Technical Information

Steering
EHi Steering Valvewww.danfoss.com

Technical Information
EHi Steering Valve

Revision history

Table of revisions
Date

ChangedRev

March 2022

Updated master model code section to align with the Design Center configurator

0401

July 2020

Updated document number to match online catalog.

0305

Changed document number from 'BC00000379' to 'BC220386485094'

XX

January 2018 Function, Technical Characteristics, Coding ; minor corrections and additions

0202

April 2017

0201

Updated some function drawings; added to EHi and system safety; Corrected Code numbers
specifications; and minor corrections

January 2017 First edition

2 | © Danfoss | March 2022

0101

BC220386485094en-000401

Technical Information
EHi Steering Valve
Contents
Overview
A wide range of steering components..................................................................................................................................... 4
Survey of literature on Danfoss steering components....................................................................................................... 5
Electrohydraulic Steering Valve.................................................................................................................................................. 6
Versions
Versions, overview........................................................................................................................................................................... 7
Parts and variants........................................................................................................................................................................7
Steering concept......................................................................................................................................................................... 7
Disengage of EH steering.........................................................................................................................................................8
Actuation of EHi steering valve..............................................................................................................................................8
Priority valve................................................................................................................................................................................. 8
Pilot relief valve............................................................................................................................................................................8
Shock valves..................................................................................................................................................................................8
Versions, examples...........................................................................................................................................................................9
EHi for Load Sensing Non-Reaction steering system.....................................................................................................9
EHi for Open Center Non-Reaction steering system....................................................................................................11
EHi for Load Sensing Reaction steering system............................................................................................................ 12
EHi for Steer by Wire steering system............................................................................................................................... 14
EHi for Hydraulic Disengage.................................................................................................................................................15
Function
Main components..........................................................................................................................................................................17
EHi xx LD R E for Reaction type steering unit.......................................................................................................................18
Neutral position.........................................................................................................................................................................18
Steering Right with EHi...........................................................................................................................................................20
Steering Right with EHi and OSP: variable steer mode...............................................................................................22
EHi xx LD N E for Non-Reaction type steering unit ........................................................................................................... 23
Neutral position.........................................................................................................................................................................23
Steering Right with EHi...........................................................................................................................................................24
EHi xx W1 N for Steer by Wire steering...................................................................................................................................26
Neutral position.........................................................................................................................................................................26
Steering Right with EHi...........................................................................................................................................................27
Technical data
EHi .......................................................................................................................................................................................................28
Weight................................................................................................................................................................................................28
PVE actuation modules................................................................................................................................................................ 28
PVE connectors............................................................................................................................................................................... 30
Coil of control valve for mode select...................................................................................................................................... 32
Electrical specifications................................................................................................................................................................32
Dimensioning steering system
Steering systems with EHi steering valve..............................................................................................................................34
Technical characteristics
EH-directional spools of EHi ......................................................................................................................................................35
Pilot pressure relief valve, (P - T, Qp) characteristic........................................................................................................... 36
Pressure drop, P-EF for EHi valve..............................................................................................................................................36
Dimensions
EHi with PVED-CLS.........................................................................................................................................................................38
System safety
Emergency steering...................................................................................................................................................................... 39
EHi and system safety...................................................................................................................................................................39
Safety considerations, On-road operation............................................................................................................................39
Variants and ordering specifications
EHi Master Model Code (MMC) breakdown......................................................................................................................... 41
Code numbers.................................................................................................................................................................................42
EHi standard configurations.......................................................................................................................................................43© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Overview
A wide range of steering components

Danfoss is one of the largest producers in the world of steering components for hydrostatic steeringsystems on off-road vehicles. Danfoss offers steering solutions both at component and system levels. Our
product range makes it possible to cover applications of all types, ranging from ordinary 2 wheel steering(also known as Ackermann steering) to articulated steering, automatic steering (for example, by sensor)
and remote controlled steering via satellite. We can offer more than 1,800 different steering units and 250
different priority valves categorized in types, variants and sizes.
Danfoss offers:
For hydrostatic steering systems:
Product type

Displacement

Rated Flow

Steering Pressure

Mini steering units

32 – 100 cm3/rev[1.95 –6.10 in3/rev]

max. 20 l/min[5.28 US gal/min]max. 140 bar[2030 psi]

Steering units

40 – 1200 cm3/rev[2.44 to 73.2 in3/rev]

max. 100 l/min[26.4 US gal/min]max. 240 bar[3481 psi]

Priority valves–40, 80, 120, 160, 320 l/min[10.6, 21.1, 31.7, 42.3, 84.5
US gal/min]max. 350 bar[5076 psi]–
Pilot operated flowamplifiers (factors: 4, 5, 8,
or 10)
Pilot operated steering
valves–

240 and 400 l/min [63.4 and max. 240 bar
105.7 US gal/min][3480 psi]
max. 100 l/min[26.4 US gal/min]max. 250 bar[3625 psi]

For electrohydraulic steering systems

4 | © Danfoss | March 2022

Product type

Displacement

Rated flow

Steering pressure

Pilot operated steering
valves-

100 l/min [26.4 US gal/min]

250 bar [3625 psi]

Integrated electricallyoperated steering valve

100 - 500 cm3/rev[6.10 - 30.51 in3]

50 l/min [13.2 US gal/min]

210 bar [3045 psi]Electrically operated
steering valve-

70 l/min [18.5 US gal/min]

250 bar [3045 psi]

BC220386485094en-000401

Technical Information
EHi Steering Valve
Overview
Characteristic features for steering units:

•
•
•
•
•
•

Low steering torque: from 0.5 to 3 N•m in normal steering situations
Low noise levelLow pressure drop
Many types available: Open center Non-reaction, Open center Reaction, Power Beyond, Closed center
Non-reaction, Load Sensing, Load Sensing Reaction
One or more built-in valve functions: relief valve, shock valves, suction valves, non-return valve in Pline and LS-line
Optional port connections according to ISO, SAE or DIN standards

Characteristics for EH steering systems with OSPE, EHPS, and EHi:•••

Possibility of GPS, row sensor, variable steering ratio and joystick steering
Possibility of manual steering even on very heavy vehicles
EHPS:‒ High steering pressure requiring smaller cylinders and flow
‒ Low pilot pressure and flow giving extremely low noise in the cabin‒ Combined with Danfoss PVG 32 proportional valve

Conversion factors
1 N•m = [8.851 lbf•in]

1 l = [0.264 US gal]

1 N = [0.2248 lbf]

1 bar = [14.5 psi]

1 mm = [0.0394 in]°F = [1.8°C + 32]

1 cm3 = [0.061 in3]

Survey of literature on Danfoss steering components
Detailed data on all Danfoss steering components and accessories can be found in our steering
component catalogs, which is divided in to the following individual sub catalogs:
General information

Steering components

Technical data on open center, and closed center steering units

OSPB, OSPC, and OSPD

Technical data on load sensing steering units, priority valves and flow
amplifiers

OSPB, OSPC, OSPF, OSPD, OSPDF, OSPL, OSPBX, and OSPLXTechnical data on priority valves

OLS

Technical data on priority flow amplifiers

OSQ

Technical data on valve blocks

OVPL and OVR

Technical data on load sensing steering units with amplification

OSPU

Technical data on steering units with zero dead band

OSPS

Technical data on steering units with integrated priority valve

VSPP

Technical data on hydraulic and EH pilot operated steering valves,electrical actuation modules and appropriate steering units.

EHPS, EHPS w. OLS 320, PVE for EHPS and OSPCXTechnical data on combined steering unit/EH steering valves and steering
wheel sensors

OSPE

Technical data on electrohydraulic steering valves

EHi

Technical data on steering wheel sensors

SASA

For technical information on individual variants, please contact the Danfoss Sales Organization.

© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Overview
Electrohydraulic Steering Valve
On tractors, harvesters, sprayers and other similar vehicles, electrically actuated steering to make auto
guidance possible is often needed. Also, manual steering with variable ratio is a preferred feature to
improve productivity and driver comfort.
On wheel loaders, fork lift trucks and similar type of vehicles, the productivity and driver comfort can beincreased significantly for off road usage, by using joystick or mini wheel for steering.
Danfoss has developed the Electrohydraulic Steering Valve (EHi) for electrohydraulic steering, controlled
by electrical input signal either from GPS receiver/controller for auto guidance, or from steering wheel
sensor (Danfoss type SASA) for variable steering ratio. In variable steering mode, the electrohydraulicvalve adds flow to the metered flow from the OSP steering unit. Alternatively, the EHi can be activated by
joystick or mini wheel.
The EHi design supports category 3 architecture according to ISO 13849-1. Fail-safe operation ofelectrohydraulic steering is achieved by means of two individual spools, both supporting medium
diagnostic coverage 90-99%. The EHi is available with PVED-CLS steering valve controller to complete afull CAT3 fail-safe steering valve. The PVED-CLS has steering specific functions, including dedicated safetyfunctions, which may be tailored for most off-road vehicles through software parameterization. The EHi isoffered with an independent 3rd party certification and a full steering sub-system specification.
EHi will be the natural choice, if space does not allow to use the combined steering unit andelectrohydraulic steering valve, type OSPE. With OSPE, installation will be very easy due to all functions
for manual and electrohydraulic steering is integrated in the one and same unit.
The EHi is designed for easy integration with other components in a steering system. EHi manifold ports
allows for building a steering system without the use of T fittings.

6 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions

Versions, overview
Parts and variantsPart

Variants

EH

EHi

EH spool, directional

Cylinder flow,
nominal, l/min

12Single section Electrohydraulic in-line (EHi) steering valve
20

30

40

50

Concept

Steering unit type or
Steer by WireOpen
center:OC

Closedcenter:CC

LS
dynamic:
LD

LS static:
LS

Steer by Wire:
W1 or W2

Reaction

Reaction Switch
Valve, RSV

Not included: N

Disengage

How to override EH
steering

Electric signal, frome.g. SASA sensor: E

Hydraulic override
from steering unit: H
PVED CCType

PVED CLS SIL 2

Coil, Voltage

Voltage, V

12Priority valve

For pump flow,
nominal, l/min

45

Relief valve

P-T, bar.

Shock valves

R-T/L-T, bar

Included: R

With steering unit:

PVE Actuation
module70

Steer by Wire:
Not relevant
PVES

24
90

None if priority valve
is not needed inside
EHi

Always included: setting value, max 250 bar
Included: setting value, max 308
bar

Not included

For a list of catalog numbers and example master model codes, see Code numbers on page 42.
Base type designation, example: EHi 20 LD N E• 20 is referring to nominal cylinder flow, named xx in examples• LD, N and E is referring to steering concept
Steering concept
EHi is offered in various versions to match the base steering unit on the vehicle.
EHi is available for:• OC: Open Center steering units• LD: Load Sensing Dynamic steering units• LS: Load Sensing Static steering units• N: Non reaction type steering units• R: Reaction type steering units
EHi is also offered in versions for pure Steer by Wire usage, meaning no hydrostatic steering unit ispresent in the steering system. EHi is available for:
• W1: EHi in Steer by Wire system© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
Disengage of EH steering
In any steering system having a hydrostatic steering unit for the base steering, the steering wheel
steering must have priority. The concept for deactivating the electrohydraulic steering must be
considered and decided. Disengage of EH steering by:• E: Electric signal detecting steering wheel rotation, for example, from Danfoss steering wheel sensor,
type SASA‒ Electrical disengage is recommended• H: Hydraulic signal from steering unit overrides electrohydraulic steering‒ Disengage of EH steering is available with the PVED-CLS actuator
Variable steer mode is not available when using hydraulic disengage.
Actuation of EHi steering valve
EHi is offered with different types of PVE actuators:
PVED-CLS: CAN ISOBUS controlled actuator with configurable electrohydraulic steering functionalities
such as auto guidance, variable steering ratio, speed dependent characteristics, AUX interface forjoystick and electric mini wheel, and with safety functions including controlling the EH cut-off valve. It
can also handle up to 3 analogue inputs. See OSPE with PVED-CLS Steering Valve Controller Data Sheet,
AI152986484866 for further details. PVED-CLS is recommended as actuator for EHi.
• PVED-CC: CAN ISOBUS controlled actuator without dedicated software for steering. See PVED-CC,
Series 5 ISObus Technical Information, BC159886484234 for further details. To be used if EH steeringfunctionalities and steering safety must be controlled by external controller, for example, vehicle
main controller.
• PVES: Ratio metric analog voltage controlled actuator without dedicated software for steering. See
PVE Series 7 Technical Information, BC218286485446 for further details.

•

Priority valve
EHi is offered with and without integrated priority valve.
Pilot relief valve
Pilot relief valve is present in any EHi. Internal connection of pilot relief valve inside EHi is dependent on
the pilot relief valve being present in the steering unit or not.
Shock valves
EHi is offered with or without shock and suction valves. Shock and suction valves are needed if they are
not present elsewhere in the steering system. If shock and suction valves are present in the steeringsystem, and always connected to the cylinder ports, additional shock and suction valves inside the EHi
will not be needed. Activation of shock valves may produce an audible noise.

8 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
Versions, examples
EHi for Load Sensing Non-Reaction steering system

EHi xx LD N EThis version is to be used in steering systems with LS Dynamic Non-Reaction steering unit and using
SASA sensor for electrical disengage of EH steering. EH steering will be disabled, when the electric poweris shut down for the solenoid valve (SOL).

Configuration number: EHi-1
No internal priority valve© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
Configuration number: EHi-4
Internal priority valve and EF-T connection

10 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
EHi for Open Center Non-Reaction steering system

EHi xx OC N EThis version is to be used in steering systems with Open Center Non-Reaction steering unit and using
SASA sensor for electrical disengage of EH steering. A priority valve is present inside EHi steering valve.
The priority valve is needed to generate stand by pressure across the EH directional valve. EH steering will
be disabled, when the electric power is shut down for the solenoid valve (SOL).

Configuration number: EHi-2© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
EHi for Load Sensing Reaction steering system

EHi xx LD R EThis version is to be used in steering systems with LS Dynamic Reaction steering unit and using SASA
sensor for electrical disengage of EH steering. Priority valve is needed inside EHi steering valve, when nopriority valve is present elsewhere. EH steering will be disabled, when the electric power is shut down forthe solenoid valve (SOL).

Configuration number: EHi-5

12 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
Configuration number: EHi-6
No internal priority valve© Danfoss | March 2022

BC220386485094en-000401 | 13

Technical Information
EHi Steering Valve
Versions
EHi for Steer by Wire steering system

EHi xx W1 N
This version is to be used in a fail-safe Steer by Wire steering system. Only the EHi valve can control thesteering cylinder. Priority valve is needed inside EHi steering valve to generate stand by pressure acrossthe directional spool. Engage and disengage of the EH steering can be controlled by a PVED-CLS actuator
or by a vehicle controller. EH steering will be disabled, when the electric power is shut down for thesolenoid valve (SOL).

Configuration number: EHi-7

14 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
EHi for Hydraulic Disengage

EHi xx xx x H
The hydraulic disengage versions of EHI for Load Sensing (EHI-9) and Open Center (EHI-10) are designed
for use with either Reaction or Non-Reaction steering units. A load sense signal is used to disengage EH
steering, so the SASA sensor is not required. EH steering will be disabled when the electrical power is shut
down for the solenoid valve (SOL).

Configuration number: EHi-9
Example shown is for load sensing dynamic© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Versions
Configuration number: EHi-10
For Open-Center

16 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Function

Main components
The EHi Steering Valve main components

8

9

3

2
1

10, 11, 12, 13

14

4

5, 6, 716

17, 18© Danfoss | March 2022

1.

RSV: Reaction Switch Valve10.

PP damping orifice2.

SOL: Solenoid control valve for EH cut off valve and RSV

11.

Priority valve spool3.

COV: EH cut off valve

12.

Priority valve spring

4.

EH directional valve

13.

Dynamic orifice5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice (not shown in image)

7.

Solenoid valve bridge

16.

PVFC valve/LS resolver

8.

Pilot reduction valve, 13 bar, SOL-PE

17.

Suction valves

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

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Technical Information
EHi Steering Valve
Function
EHi xx LD R E for Reaction type steering unit
EHi for Load Sensing Dynamic Reaction OSP Steering unit, electrical disengage of EHi by SASA steering
wheel sensor.
Configuration number: EHi-5
Neutral position

1
2
3

18

4
5

17

6

16

7
15
14
13
8
9

12

10
11

1.

RSV: Reaction Switch Valve10.

PP damping orifice2.

SOL: Solenoid control valve for EH cut off valve and RSV

11.

Priority valve spool3.

COV: EH cut off valve

12.

Priority valve spring

4.

EH directional valve

13.

Dynamic orifice5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice7.

Solenoid valve bridge

16.

PVFC valve/LS resolver

8.

Pilot reduction valve, 13 bar, SOL-PE

17.

Suction valves

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

When the engine is turned off, the priority valve spool (11) is pushed to the left by the priority valve
spring (12). The passage to the EF port is blocked. The passage to the EH directional valve spool (4) and to
the CF port of EHi is open. The P-port of the OSP LSR steering unit is connected to CF port of EHi.
When the engine is on and the steering unit OSP and the EH directional valve (4) is in neutral position, theCF pressure will rise to match the spring force in the priority valve, consequently the priority valve spool(11) will move to the right and the main pump flow will pass from P port of EHi across the integrated
priority valve spool (11) and out through the EF port. The priority valve is a “dynamic” type, meaning,when pump is on, a minor oil flow passes from CF through the Dynamic orifice (13) integrated in priority
18 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Functionvalve spool (11), the LS orifice (15), the PVFC valve/LS resolver (16), out of LS2 port of EHi and into the LS
port of the OSP steering unit. In OSP the flow in LS line streams into the spool/sleeve set and in neutral
position this dynamic oil flow passes on to tank.
When the OSP LSR reaction type steering unit is in neutral position and the solenoid control valve (2) isdeactivated, then the steering system has Reaction features: the RSV valve (1) makes connection between
the cylinder ports, CL and CR, through L and R of OSP. If the steering wheel is untouched and a delta P isgenerated in the steering cylinder, e.g. from self-aligning of the steered front axle, oil will pass from L to R
or R to L through the spool/sleeve set and gear set of the OSP steering unit and the steering wheel will
rotate until it is grabbed or delta P disappears. Only the force of the neutral spring package inside the
OSP has to be overcome to stop to rotation of the steering wheel and so stop the cylinder movement/
reaction feature.
When the SOL: Solenoid control valve for EH cut off valve (2) is deactivated, the COV: EH cut off valve (3)will prevent unintended EH steering, because CL and CR connections from EH directional valve (4) areblocked in COV: EH cut off valve (3). Pilot pressure to the PVE solenoid valve bridge (7) is interrupted. OSP
steering is possible, due to RSV: Reaction Switch Valve (1) stays in normal open position.
For any steering system that includes a steering unit OSP and EHi valve with Reaction Switch Valve (RSV),
it is important that EHi and OSP share the same tank pressure. For this purpose, the EHi provides two tankports, one of which is intended for connection to the OSP steering unit.

C Caution
Loss of EH steering or for reaction systems, an unintended turning of the steering wheel.
In load sense systems, the LS to T pressure, and in open center systems the P to T pressure drop in thesteering unit should not exceed 14 bar when the steering unit is in neutral position.

© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Function
Steering Right with EHi

1
2
3

18

4
5

17

6
7

16
15
14
13
8
9

12

10
11

1.

RSV: Reaction Switch Valve10.

PP damping orifice2.

SOL: Solenoid control valve for EH cut off valve and RSV

11.

Priority valve spool3.

COV: EH cut off valve

12.

Priority valve spring

4.

EH directional valve

13.

Dynamic orifice5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice7.

Solenoid valve bridge

16.

PVFC valve/LS resolver

8.

Pilot reduction valve, 13 bar, SOL-PE

17.

Suction valves

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

This EHi valve has two pilot reduction valves, PRV’s: (8) and (9):• PRV (9) gives pilot supply, 13 bar above tank pressure to the PVE (5), when the EH cut off valve, COV(3) is activated.
• PRV (8) gives pilot pressure, up to 13 bar above PVE pilot pressure (in total up to 26 bar above tankpressure) to activate the reaction switch valve, RSV (1), and to activate COV (3), when the solenoid
valve SOL (2) is activated.
Before it is possible to steer with the EHi valve, it is needed to power the solenoid valve (2). When having
PVED-CLS (5) on the EHi, the CLS controls the SOL (2). The CLS must receive an input from a MMI (Man
Machine Interface) to provide EH steering and the CLS will power the SOL (2).
When RSV (1) is activated, Reaction feature of the LSR type steering unit is blocked, the steering wheel
will stay in fixed position independent of cylinder port pressures.

20 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Function
When an input signal for steering is transmitted to the electrical connectors of the PVE (5), in this example
to steer to the right, the solenoid valve bridge (7) is activated, and the EH directional spool (4) is moved to
the right. So LS in spool (4) will sense the needed steering pressure, and this is transmitted to the PVFC
valve/LS resolver (16). So the valve (16) makes restriction in the dynamic LS flow from dynamic orifice (13)of priority valve, and the LS pressure on the priority valve spool (11) will match the LS pressure required
from the EH directional valve spool (4). Accordingly, the position of the priority valve spool (11) willchange to match the flow and pressure demand for EH-steering.
In case the monitoring part of the PVED-CLS registers an unintended EH directional spool movement, theelectrical power to the SOL (2) will be switched off.
The valves (8 and 9) will dump pilot pressure to tank, COV (3) will change position so that connection
from EH directional valve spool (4) to cylinder ports will be blocked. Furthermore, it will not be possible toactivate the solenoid valve bridge (7) of PVE without pilot pressure. RSV (1) also changes position to open
connection between L and R of OSP to the cylinder ports CL and CR.
In any steering scenario, manual steering wheel steering can override the EH steering by turning thesteering wheel; the steering wheel sensor type SASA transmits signal to the PVED-CLS and the EH
steering will disengage to give steering wheel priority. Furthermore, LS pressure from OSP steering unit
will increase, and this pressure will be transmitted to port LS2 of EHi and on to the RSV (1) and this will
open for steering wheel steering. For hydraulic disengage versions, the PVED-CLS detects an inability tomove the EH directional valve due to the same LS pressure increase from the OSP also acting on the COV
and creating a PVE pilot pressure (PE) drain to tank through the COV.

© Danfoss | March 2022

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Technical Information
EHi Steering Valve
Function
Steering Right with EHi and OSP: variable steer mode

1
2
3

18

4
5

17

6

16

7
15
14
13
8
9

12

10
11

1.

RSV: Reaction Switch Valve10.

PP damping orifice2.

SOL: Solenoid control valve for EH cut off valve and RSV

11.

Priority valve spool3.

COV: EH cut off valve

12.

Priority valve spring

4.

EH directional valve

13.

Dynamic orifice5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice7.

Solenoid valve bridge

16.

PVFC valve/LS resolver

8.

Pilot reduction valve, 13 bar, SOL-PE

17.

Suction valves

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

For this variable steering ratio/combined steering mode: EHi + OSP, the CLS must receive an input from a
MMI (Man Machine Interface) to allow EH and OSP steering in combination: The SASA signal will be used
to add EH flow to the OSP steering as function of steering wheel speed. The LS pressure from OSP will betransmitted to the LS2 port of the EHi, and on to the RSV (1), so that this will stay in open position during
steering wheel steering. At the same time the PVED CLS (5) will receive a signal to add EH flow to the OSP
flow. So the number of turns on the steering wheel moving the steered wheels from the one to the otherlock will be reduced dependent on parameter setting of the PVED CLS.

22 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Function
EHi xx LD N E for Non-Reaction type steering unit
EHi for Load Sensing Dynamic none reaction OSP Steering unit, electrical disengage of EHi by SASA
Steering Wheel Sensor. This EHi version has less valve functions than EHi for Reaction type steering unit,
described EHi xx LD R E for Reaction type steering unit on page 18. When the none reaction type steering
unit has integrated shock and suction valves, these valve functions are not needed inside the EHi valve.
With no reaction switch valve (RSV) it is not needed to have high pilot pressure, therefore only one pilot
reduction valve is present.
Configuration number: EHi-4
Neutral position

2
3
4
5
6

16

7
15
14
13
9

12

10
11

2.

SOL: Solenoid control valve for EH cut off valve

10.

PP damping orifice3.

COV: EH cut off valve

11.

Priority valve spool

4.

EH directional valve

12.

Priority valve spring

5.

PVE control unit

13.

Dynamic orifice6.

Spool position sensor LVDT

14.

Pilot pressure relief valve

7.

Solenoid valve bridge

15.

LS orifice9.

Pilot reduction valve, 13 bar, PE-T

16.

PVFC valve/LS resolver

When the engine is turned off, the priority valve spool (11) is pushed to the left by the spring (12). The
passage to the EF port is blocked. The passage to the EH directional valve spool (4) and to the CF port ofEHi is open. The P-port of the OSP LS steering unit is connected to CF port of EHi.
When the engine is on and the steering unit OSP and the EH spool (4) is in neutral position, the CF
pressure will rise to match the spring force in the priority valve, consequently the priority valve spool (11)© Danfoss | March 2022

BC220386485094en-000401 | 23

Technical Information
EHi Steering Valve
Function
will move to the right and the main pump flow will pass from P port of EHi across the integrated priority
valve spool (11) and out through the EF port.
The priority valve is a “dynamic” type, meaning, when pump is on, a minor oil flow passes from CF
through the Dynamic orifice (13) (integrated in spool 11), the LS orifice (15), the PVFC valve (16), out of
LS2 port of EHi and into the LS port of the OSP steering unit. In OSP the flow in LS line streams across the
LS check valve and into the spool/sleeve set and in neutral position this dynamic oil flow passes on totank.
When the solenoid control valve (2) is deactivated, the EH cut off valve (3) makes unintended EH steering
impossible, if for example, a false input signal comes to the PVE control unit (5), because CL and CR
connections from EH directional valve spool (4) are blocked in (3).
Steering Right with EHi

2
3
4
5
16

6
7

15
14
13
9

12

10
11

2.

SOL: Solenoid control valve for EH cut off valve

10.

PP damping orifice3.

COV: EH cut off valve

11.

Priority valve spool

4.

EH directional valve

12.

Priority valve spring

5.

PVE control unit

13.

Dynamic orifice6.

Spool position sensor LVDT

14.

Pilot pressure relief valve

7.

Solenoid valve bridge

15.

LS orifice9.

Pilot reduction valve, 13 bar, PE-T

16.

PVFC valve/LS resolver

Before it is possible to steer with the EHi valve, it is needed to power the solenoid valve, SOL (2). When
having PVED CLS (5) on the EHi, the CLS controls the SOL (2). The CLS must receive an input from a MMI(Man Machine Interface) to provide EH steering and the CLS will power the SOL (2). When SOL is

24 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Function
activated, the EH cut off valve, COV (3) will be moved and pilot pressure from pilot reduction valve, PRV(9) gives pilot supply to the PVE (5) and COV opens for EH steering.
When an input signal for steering is transmitted to the electrical connectors of the PVE (5), in this example
to steer to the right, the solenoid valve bridge (7) is activated, and the EH directional spool (4) is moved to
the right. So LS in spool (4) will sense the needed steering pressure, and this is transmitted to the PVFC
valve/LS resolver (16). So the valve (16) makes restriction in the dynamic LS flow from dynamic orifice (13)of priority valve, and the LS pressure on the priority valve spool (11) will match the LS pressure required
from the EH directional valve spool (4). Accordingly, the position of the priority valve spool (11) willchange to match the flow and pressure demand for EH-steering.
In case the monitoring part of the PVED CLS registers an unintended EH directional spool movement, theelectrical power to the SOL (2) will be switched off. So valve (9) will dump pilot pressure to tank, COV (3)will change position, then connection from EH directional valve spool (4) to cylinder ports will beblocked, and EH steering stops.
In any steering scenario, manual steering wheel steering can override the EH steering: by turning thesteering wheel, the steering wheel sensor type SASA transmits signal to the PVED CLS and the EH
steering will disengage to give steering wheel priority.
Variable steering ratio/Combined steering mode, EHi + OSP is also possible (not illustrated as diagram):
The CLS must receive an input from a MMI (Man Machine Interface) to allow EH and OSP steering in
combination: The SASA signal will be used to add EH flow to the OSP steering as function of steering
wheel speed. So the number of turns on the steering wheel moving the steered wheels from the one tothe other lock will be reduced dependent on parameter setting of the PVED CLS.

© Danfoss | March 2022

BC220386485094en-000401 | 25

Technical Information
EHi Steering Valve
Function
EHi xx W1 N for Steer by Wire steering
EHi Load Sensing Static steering valve for fail-safe Steer by wire Steering. EHi only can be disengaged byremoving electric power to solenoid valve.
Configuration number: EHi-7
Neutral position

2
3

18

4
17

5
6
7

15
14
12
9
10
11

2.

SOL: Solenoid control valve for EH cut off valve

10.

PP damping orifice3.

COV: EH cut off valve

11.

Priority valve spool

4.

EH directional valve

12.

Priority valve spring

5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice7.

Solenoid valve bridge

17.

Suction valve

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

When the engine is turned off, the priority valve spool (11) is pushed to the left by the spring (12). The
passage to the EF port is blocked. The passage to the EH directional valve spool (4) is open. When theengine is on and the EH spool (4) is in neutral position, the CF pressure will rise to match the spring force
in the priority valve, consequently the priority valve spool (11) will move to the right and the main pumpflow will pass from P port of EHi across the integrated priority valve spool (11) and out through the EF
port.
When the solenoid control valve (2) is deactivated, the EH cut off valve (3) will prevent unintended EH
steering, because CL and CR connections from EH directional valve spool (4) are blocked in (3). Pilotpressure to the PVE solenoid valve bridge (7) is interrupted.

26 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Function
Steering Right with EHi

2
3

18

4
17

5
6
7

15
14
12
9
10
11

2.

SOL: Solenoid control valve for EH cut off valve

10.

PP damping orifice3.

COV: EH cut off valve

11.

Priority valve spool

4.

EH directional valve

12.

Priority valve spring

5.

PVE control unit

14.

Pilot pressure relief valve

6.

Spool position sensor LVDT15.

LS orifice7.

Solenoid valve bridge

17.

Suction valve

9.

Pilot reduction valve, 13 bar, PE-T

18.

Shock valves

Before it is possible to steer with the EHi valve, it is needed to power the solenoid valve, SOL (2). When
having PVED-CLS (5) on the EHi, the CLS controls the SOL (2). The CLS must receive an input from a MMI(Man Machine Interface) to provide EH steering and the CLS will power the SOL (2). When SOL is
activated, the EH cut off valve, COV (3) will be moved and pilot pressure from pilot reduction valve, PRV(9) gives pilot supply to the PVE (5) and COV opens for EH steering. When an input signal for steering istransmitted to the electrical connectors of the PVE (5), in this example to steer to the right, the solenoid
valve bridge (7) is activated, and the EH directional spool (4) is moved to the right. So LS in spool (4) willsense the needed steering pressure, and this is transmitted on to the priority valve spool (11).
Accordingly, the position of the priority valve spool (11) will change to match the flow and pressure
demand for EH-steering.
In case the monitoring part of the PVED-CLS registers an unintended EH directional spool movement, theelectrical power to the SOL (2) will be switched off. So valve (9) will dump pilot pressure to tank, COV (3)will change position, then connection from EH directional valve spool (4) to cylinder ports will beblocked, and EH steering stops.

© Danfoss | March 2022

BC220386485094en-000401 | 27

Technical Information
EHi Steering Valve
Technical data

EHi
The technical data for EHi are typical measured results. For the hydraulic system a mineral based
hydraulic oil with a viscosity of 21mm2/s (102 SUS) and a temperature of 50° C (122° F) was used.
Max. pressure

Port P-T, EF-T

250 bar[3625 psi]

Port CF-T

250 bar[3625 psi]

Port LS1-T, LS2-T

250 bar[3625 psi]

Port L-T, R-T, CL-T, CR-T

308 bar[4467 psi]

Port T

25 bar[362 psi]

Port P, EF

90 l/min[23.8 US gal/min]Port L, R, CL, CR
steering wheel steering

70 l/min[18.5 US gal/min]Port CL, CR
EH steering

12, 20, 30, 40, 50 or 70
l/min[3.2, 5.3, 7.9, 10.6, 13.2 or
18.5 US gal/min]

Spool travel,
EH directional spool± 4 mm[± 0.16 in]

Dead band, EH-directional
spool, nominal± 0.8 mm[± 0.03 in]

Oil flow rated

Priority valve

Oil temperature

Type

Dynamic or Static

Spring force

7 bar, 10 bar[100 psi, 145 psi]

Nominal flow

45 or 90 l/min

11.9 or [23.8 US gal/min]

Recommended temperature +30° C to +60° C[+86° F to +140° F]

Min. temperature-30° C[-22° F]

Max. temperature

90° C[190° F]

Ambient temperature-30° C to +60° C[+22° F to +140° F]

Operating range

12 to 75 mm2/sec[66.0 to 370.3 SUS]

Min. viscosity

10 mm2/sec[58.9 SUS]

Max. viscosity

460 mm2/sec[2134 SUS]

Filtration

Max contamination(ISO 4406)

21/19/16

Temperature difference
between steering valve andother hydraulics

Max.

Δ10° COil viscosity[Δ18° F]

WeightEHi weighs 11.2 kg (24.7 lbs).
PVE actuation modules
PVE actuation modules comprehensive technical literature
PVED-CLSOSPE with PVED-CLS Steering Valve Controller Data Sheet

AI152986484866

PVED-CC Series 5

PVED-CC Series 5 Technical Information

BC159886484234

PVES Series 7

PVE Series 7 Technical Information

BC218286485446

Comprehensive technical literature is online at www.danfoss.com

28 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Technical data
PVE actuation modules main values
PVED-CLS
Supply voltage
Current consumption

Signal voltage

9 to 35 Vdc

Oil viscosity

Oil temperature--

in on-road mode

0.23 A at 12 V--

in operational mode-

0.52 A at 12 V-

in neutral – Power state-

0.08 A at 12 V-

at rated voltage PVES--

0.57 A at 12 V

neutral--

0.5 x U DC

CR-port ↔
CL-port--0.25 • U DC to
0.75 • U DC--

0.25 mA to 0.70 mA

Electrical de-energized

0 l/min0 l/min

0.3 l/min

Spool locked position

0 l/min0 l/min

0.1 l/min

Pilot oil flow, continuous
actuations

0.7 l/min

0.7 l/min

0.8 l/minrange

12 to 75 mm2/s

min.

10 mm2/s

max.

460 mm2/s

Rec. range+30° C to +60° C (+86° F to +140° F)-30° C (+22° F)

max.
Rec. range

Filtering
Pilot pressure

90° C (194° F)-30° C to +60° C (+22° F to +140° F)
Max. allowed degree of contamination (ISO 4406): 23/19/16

Rec. range

13.5 ± 1.5 bar

Hysteresis© Danfoss | March 2022

11 to 32 Vdc

1.32 A at 12 V

min.
Ambient temperature

PVES

in operational/off-road
mode, activating cut off
valve, max

Signal current at rated
voltageOil consumption

PVED-CC

approx. 0%

Enclosure

DEUTSCH connector

Pins, surface treatment

DEUTSCH connector

IP 67
Sn/TinNi/Nickel

BC220386485094en-000401 | 29

Technical Information
EHi Steering Valve
Technical data
PVE connectors
PVED-CLS
DEUTSCH one 12 pin connector - DT04-12PA-B016

12

1

7

6

Pinouts
PinoutFunction

PinoutFunction

1

AD2

7

Power ground -

2

AD3

8

Power supply +3

Sensor power ground9

CAN_L_MAIN

4

CAN_H_SAFETY

10

CAN_H_MAIN

5

CAN_L_SAFETY

11

5V sensor supply+

6

Digital output

12

AD1

PinoutFunction

Terminator resistor: None
Mating connector: DT06-12SA-P012
PVED-CCDEUTSCH DT - two 4 pin connector, DT04-4P

4

1

3

2

2

3

1

4

Pinouts
PinoutFunction
Front

Back

1

CAN_H

1

CAN_H

2

CAN_L

2

CAN_L

3

Power supply +3Power supply +4Power ground -4

Power ground -Terminator resistor: None
Mating connector: DT06-4S-E003
30 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Technical data
PVES
DEUTSCH DT - one 6 pin connector, DT04-6P

3

4

2

5

1

6

Pinouts
PinoutFunction

PinoutFunction1

Vsignal4

Spool position

2

Error

5

Power ground -3

Not used

6

Power ground +Mating connector: DT06-6S-E003© Danfoss | March 2022

BC220386485094en-000401 | 31

Technical Information
EHi Steering Valve
Technical data
Coil of control valve for mode selectSpecifications

•
•
•
•
•
•

Duty cycle rating: 100%
Magnet wire insulation: Class H (180C)
Ambient temperature: -30° C to +60° C [-22° F to +140° F]
Diodes are available; contact your Danfoss representative
Environmental protection: IP 65
All AC coils are internally rectified

Operating limits, D08, 16 watt coil
100°
90°
80°
2

70°
60°
1

50°
3
40°
30°
20°
10°
0°

-10°
-20°
70%

80%

90%

100%

110%

120%

130%

140%

4

1. Minimum pull-in voltage
2. Maximum operating limit
3. Ambient temperature in Celsius
4. Percent rated voltage

Electrical specifications
16 watt coils

32 | © Danfoss | March 2022

Voltage(V)

Resistance (Ohms) ±5% at 20° C [72 Current draw (A) at 25° C [77° F]
°F]

Color

Terminals

12

9

1.33

Gray

DEUTSCH

24

36

0.67

Black

DEUTSCH

BC220386485094en-000401

Technical Information
EHi Steering Valve
Technical data
Terminals
DEUTSCH Code DE

45.2[1.78]

60.7[2.39]© Danfoss | March 2022

Voltage (V)Power (W)Part number

12

16

D08-16-12D-DE

24

16

D08-16-24D-DE

BC220386485094en-000401 | 33

Technical Information
EHi Steering Valve
Dimensioning steering system

Steering systems with EHi steering valve
Steering systems using an ordinary steering unit (for example, Danfoss OSP type steering unit), formanual steering and an EHi valve for electrical steering (for example, auto guidance, joystick, and/or
variable steering), the following main values for EHi must be decided.
• Nominal cylinder port flow, CQ‒ Normally based on port flow available from OSP approximately at 100 rpm steering wheel speed,for example, an OSPC 200, the port flow will be 20 l/min at 100 rpm, so the EH directional spool
should be the one with CQ = 20 l/min nominal.
• Maximum steering pressure, bar, P-T‒ Same as the P-T value for the OSP steering unit if a relief valve is present in the OSP, otherwise P-T
setting of the EHi must be determined based on maximum steering system pressure allowed.
• Shock valves, whether needed or not‒ If shock valves outside the EHi valve are protecting the cylinder ports of the EHi in any steeringmode, no shock valves will be needed inside the EHi valve.
‒ If shock valves are needed inside EHi, the setting must be approximately 50 bar higher thanmaximum steering pressure, P-T.

C Caution
High steering cylinder speed can affect controllability of the vehicle.
Do not choose a directional spool with higher nominal flow than recommended, which can affectrequirements for response time of any safety functions added to the steering system.

C Caution
EHi, in connection with OSPD ON/OR, Open center type steering units with dual displacement, systeminstability can be an issue.
Minimum flow of 5 l/min to the P port of the steering unit must be ensured, so that in any EH steeringsituation, shift valve in the OSPD steering unit will be in position for normal steer mode/full displacement.
Flow to P port of OSPD should not drop below 5 l/min to avoid the shift valve moving to “emergency
steer position”.
For fail-safe Steer By Wire Steering systems only using EHi valve for the following main values for EHi
must be decided.
• Nominal cylinder port flow, CQ‒ Normally based on maximum time(s) for turning steered wheels from one to the other cylinder
lock, cylinder having stroke volume V
V(l) 0,800 l
t(s) 2,4 sec=>
CQ (l/min) = V/t = (0,8/2,4)*60 = 20 l/min•

Maximum steering pressure, bar, P-T‒ Must be determined based on maximum steering system pressure allowed.
•

Shock valve setting‒ Must be approximately 50 bar higher than maximum steering pressure, P-T

For other options to be determined for EHi, see Versions on page 7.

34 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Technical characteristics

EH-directional spools of EHi
Cylinder flow characteristic for directional spools
Ql/min

US gal/min

70

F

F

17.5
60
15

E

E

50
12.5

D

D

40
10

C

30

C
7.5

B

B

20
5

A

A
10
2.5

L

R

-4

-3

-2

-1

0

1

2

3

4 mm

-580

-492

-328

-164

0

164

328

492

580 Can

0.35

0.40

0.43

0.46

0.5

0.54

0.57

0.60

0.65 Us/U DC

A=Valid for spools for nominal cylinder flow CQ = 12 l/min [3.17 US gal/min]B=

Valid for spools for nominal cylinder flow CQ = 20 l/min [5.28 US gal/min]C=

Valid for spools for nominal cylinder flow CQ = 30 l/min [7.97 US gal/min]D=

Valid for spools for nominal cylinder flow CQ = 40 l/min [10.57 US gal/min]E=

Valid for spools for nominal cylinder flow CQ = 50 l/min [13.21 US gal/min]F=

Valid for spools for nominal cylinder flow CQ = 70 l/min [18.48 US gal/min]

The curves, A through E, are valid for EHi with internal priority valve with 7 bar [100 psi] spring and 0.9
mm [0.035 in] dynamic orifice, and 1.2 mm (0,047 in) LS orifice, and at 60 l/min [15.85 US gal/min] pumpflow.
For EHi without internal priority valve, the curves, A through E, are valid in combination with external
priority valve OLS 80, 152B8258 at 60 l/min [15.85 US gal/min] pump flow.
The curve F is valid for EHi with internal priority valve with 10 bar [145 psi] spring and 0.9 mm [0.034 in]
dynamic orifice and 1.2 mm (0.047 in) LS orifice and at 100 l/min [26.41 US gal/min] pump flow.
© Danfoss | March 2022

BC220386485094en-000401 | 35

Technical Information
EHi Steering Valve
Technical characteristics
For EHi without internal priority valve, the curves, F is valid in combination with external priority valve
OLS 120, 152B8129 at 100 l/min [26.41 US gal/min] pump flow.
Pilot pressure relief valve, (P - T, Qp) characteristic
The pilot pressure relief valve protects the steering system against excessive pressure.
The pilot pressure relief valve works together with the priority valve in the EHi or together with theexternal priority valve to limit the maximum steering pressure P-T. The pilot pressure relief valve is set atan oil flow to the priority valve of 25 l/min [6.6 US gal/min].
Setting tolerance: rated value +10 bar [145 psi].
P-T

P-T

psi

bar

3500
3000

250

200 bar[2900 psi]
170 bar[2465 psi]
140 bar[2030 psi]

200

2500
2000
1500

150

100

1000

50
500

0

Qp
0

10

20

30

40

50

60

70

80

90

l/min

Qp
0

5

10

15

20

US gal/min

EHi's with 45 l/min priority valve spool should not be applied with more than 45 l/min pump flow.

Pressure drop, P-EF for EHi valve
This data comes from measurements on a representative sample of EHi valves from production. Oil withviscosity of 21 mm2/s at 50° C was used during measuring.
Measurement is made when the pressure on the LS connection is zero. The minimum curve applies when
the pressure on the EF connection is higher than the actual control spring pressure.
The curve for control spring pressure of 7 bar [100 psi] and 10 bar [145 psi] applies when pressure on the
EF port is zero.

36 | © Danfoss | March 2022

BC220386485094en-000401

Technical Information
EHi Steering Valve
Technical characteristics
EHi with 45 l/min priority valve spool
P-EF P-EF
psi

bar

20
250

10 bar[145 psi]
dynamic

18
16

200

10 bar[145 psi]
static7 bar[102 psi]
dynamic

14
12

150

10

7 bar
[102 psi]
static

8
100

6
50

4

min.

2
0

0
0

5

10

20

15

25

30

40

35

Qp

l/min

50

45

Qp
2.5

0

7.5

5

10

12.5

US gal/min

EHi with 90 l/min priority valve spool
P-EF P-EF
psi

bar

20
250

10 bar [145 psi] dynamic

18

10 bar [145 psi] static

16

7 bar [102 psi] dynamic
200

150

14
12

7 bar [102 psi] static

10

min.

8
100

6
50

4
2

0

0

Qp

0

10

20

30

40

50

60

70

80

90

l/min

Qp
0

© Danfoss | March 2022

5

10

15

20

US gal/min

BC220386485094en-000401 | 37

Technical Information
EHi Steering Valve
Dimensions

EHi with PVED-CLS
Dimensions in millimeters

A-A
4.5

155

3.5

84

110

C

75

42.5

194

15
14.5

110

84.5
117.5

M AD E IN D E N M AR K

73
55

20

151

60

A

C
157

87

67
42

93

68

68

34

B B

74.5

92

39.5

41

22

16.5
33.5
77.5

29
32

A

113.5
82

121.5

74

33.5
125.5

60

B-B
Ø16

111087024±0.2

Ø12±0.2

45°

C

Min. 12

Metric-port version (ISO 6149-1)

38 | © Danfoss | March 2022

P, T, EF

CL, CR, L, R

LS1, LS2C

M22 x 1.5
15 mm deep

M18 x 1.5
14.5 mm deep

M12 x 1.5
11.5 mm deep

M8 x 1.25
12 mm deepBC220386485094en-000401

Technical Information
EHi Steering Valve
System safety

Emergency steering
Steering systems with EHi steering valve and OSP steering unit:
In case of no steering pump supply, the OSP steering unit can be used for emergency steering. The gear
wheel set acts as a hand driven pump, and so muscle power will be converted from input torque androtation on the steering wheel to hydraulic power in the form of pressure and flow out of the cylinder
port to which side the steering is done.
Look in General, Steering Components Technical Information, BC152886484183, under the General
Information chapter, for calculating manual/emergency steering.
For fail-safe Steer By Wire Steering systems only using EHi steering valve, manual activated emergency
steering will not be possible. Such steering systems must be set up with complete redundancy, or it must
only be used for limited maximum driving speed and only for off road usage.
EHi and system safety
EHi has built in safety function in form of cut off valve. In starting point this cut off valve is in safe state.
Connections from directional valve to cylinder ports are blocked. The cut off valve will only make EH
steering possible when the solenoid valve is powered.
The cut off valve controls the pilot pressure to the PVE actuator. If there isn't any power on the solenoid
valve, there isn't any pilot supply to the PVE to move the directional spool out of neutral.
In addition to electrical control, by means of the solenoid valve, the reaction switch valve (RSV) can be
pushed over hydraulically by turning the steering wheel. Through this design, full system pressure isavailable to force open the RSV.
Disengage is achieved by means of SASA sensor. For EHi configuration numbers EHi-9 and EHi-10, see EHi
standard configurations on page 43. Both RSV and cut off valve (COV) can be pushed over hydraulicallyby turning the steering wheel. Disengage is achieved by means of EH spool monitoring.
Full system pressure to move spools may be considered a well tried safety principle according toISO13849-2 annex C, table C.2
PVED--CLS actuator works as a certified Safety Controller. The PVED-CLS directly controls the cut off valve
by power on/power off to the solenoid valve. If there is no power to the solenoid valve, the EHi is in Safe
State.
Integrated safety functions in the PVED-CLS can power off the solenoid valve, and bring the EHi to a safe
state. Refer to PVED-CLS Controller for Electrohydraulic Steering User Manual, AQ186886485220.
PVE actuators PVED-CC or PVES, the cut off valve function must be controlled by a separate controller. For
example, vehicle main controller, which must power on/power off the solenoid valve to disable/enable
Safe State of the EHi valve.
Safety considerations, On-road operation
PVED-CC and PVES actuators are single string designs with limited on board fault monitoring.
The OEM is responsible to establish the necessary means to inform and de-energize the PVE from thecabin when driving on public roads.

C Caution
Non-conforming steering can affect controllability of the vehicle.
Apply vehicle specific safety monitoring systems that will detect non-conforming steering; issue
appropriate warnings; and effectively disable PVED-CC and PVES actuators if necessary. A minimum
safety system should include a manual power switch to electrically power off electrohydraulic actuatorsand the solenoid valves while driving on public roads.
© Danfoss | March 2022

BC220386485094en-000401 | 39

Technical Information
EHi Steering Valve
System safety
System safety
The PVED-CLS actuator can be de-energized while driving on public roads. A road switch design may be
applied to keep the PVED-CLS energized while driving on public roads. Refer to PVED-CLS Controller forElectrohydraulic Steering User Manual, AQ186886485220.

40 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Variants and ordering specifications

EHi Master Model Code (MMC) breakdown
To create the MMC, visit the Danfoss Design Center Configurator for EHi.
Example model code
EHI-20-W1-W-N-S-H-EF-S-10-N-E-A-AA-S-N-P-P-S-P-N-S-CLSA-AA-202-NN-NN-D-12-150-210-S-B-G-N-NNDS-PB-SWID001182
Model code position
0

-

1

-

2

-

3

-

4

...

EHI

-

20

-

W1

-

W

-

N

...

Position reference
Position

Component

Position

Component

0

Product type20

L and R ports

1

Electrohydraulic flow, nominal

21

CF ports

2

Circuit type22

PVE actuator

3

Pilot unit type23

Firmware type4

Disengage

24

Firmware revision5

LS1 signal (external)

25

Firmware package

6

Integrated priority valve

26

Additional information

7

Excess flow

27

Cut-off coil connector

8Integrated priority valve type28

Cut-off coil voltage

9Integrated PV spring

29

Relief valve setting

10

Pressure resolver (PVFC)

30Shock valves setting

11

Relief valve connection

31

Dynamic orifice

12

Ports standard

32

PP orifice

13

Ports sizing

33

LS orifice14

LS1 port

34

Reaction switch15

LS2 port

35

Special feature

16

EF port

36

Label

17

P and T front ports

37

Paint

18

P and T side ports

38

Software ID

19

CL and CR ports-© Danfoss | March 2022

BC220386485094en-000401 | 41

Technical Information
EHi Steering Valve
Variants and ordering specifications
Code numbers
Configuration numbers, in the following table, are referring to matrix description for EHi standard
configurations on page 43.
Code no.

Conf.
no.

MMC*

Position

N.A.

1

2

3

4

6

7

8

9

10

11

12

22

27

28

29

30

34

37

11179597

EHi-1

30

LD

N

E

N

NN

N

NN

N

S

A

CLSA

D

12

175

NNN

N

PB

11179598

EHi-2

30

OC

N

E

H

EF

E

10

N

S

A

CLSA

D

12

175

NNN

N

PB

11179600

EHi-4

30

LD

N

E

H

ET

D

07

R

S

A

CLSA

D

12

175

NNN

N

PB

11179613

EHi-5

30

LD

N

E

H

EF

D

07

R

S

A

CLSA

D

12

175

230

H

PB

11179614

EHi-6

30

LD

N

E

N

NN

N

NN

R

S

A

CLSA

D

12

175

230

H

PB

11179601

EHi-7

30

W1

W

N

H

EF

S

10

N

E

A

CLSA

D

12

175

230

N

PB

11179595

EHI-9

30

LS/LD

N/R

H

N

NN

N

NN

W

E

A

CLSA

D

12

175

230

H

PB

11179596

EHI-10

30

OC

N/R

H

H

EF

D

07

W

E

A

CLSA

D

12

175

230

H

PB

* Not all positions are shown; only key positions which differentiate standard configurations

EHi standard configurations are primarily defined by circuit type, pilot unit type, and disengage method.
See Versions, examples on page 9 for schematics and details. See Parts and variants on page 7 for abreakdown of these options.

42 | © Danfoss | March 2022

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Technical Information
EHi Steering Valve
Variants and ordering specifications
EHi standard configurations
Configurations

OEM installation
EHi-1

Hydraulic Circuit

EHi-2

EHi-4

Load Sensing Open CenterFeatureCut-off valve••

Relief valve•

Priority valve

EHi-5

GPS Universal

EHi-7

EHi-91EHi-101

Load
Sensing(Static andDynamic)
With/
Without
ReactionOpen Center
With/
Without
Reaction

Load Sensing Load Sensing Load Sensing SBW failReaction
Reaction
safe / 4
Wheel
Steering

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

Shock-suction valves
PVFC LS resolver valve

EHi-6

SBW / 4WS

•

•

•

•

•

•

•

•

•

•

•

Reaction Switch Valve forreaction (RSV)

•

•

•

•

OSP override on RSV

•

•

•

•

•

•

LS shuttle (SBW or 2WS)
EF and T internallyconnected•

Disengage without
SASA(hydraulic disengage)2
Electrical disengage, forexample, by SASA

•

•

•

•

•

•

1 Contact Danfoss Power Solutions for more information.
2 Variable steer mode is not available when using hydraulic disengage.

© Danfoss | March 2022

BC220386485094en-000401 | 43

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© Danfoss | March 2022

BC220386485094en-000401