# Presentation: 671274

## EPA Clean Diesel Engine Implementation Workshop

- Kevin Otto
- Cummins Inc.
- August 6-7, 2003

**Implications of On-Board Diagnostics  for Engine Manufacturers**

## EPA Heavy-Duty Engine Emission Standards

- PM

**EPA Heavy-Duty Engine Emission Standards**

- Steady State
- Test

- NOx + HC

- Transient Test

- NOx
- (Unregulated)

- PM (Unregulated)

- NOx

- NOx + HC

- NOx

- PM

- Urban Bus PM

- NOx

## Future Emissions Standards

- Compliance represents a significant task
- Reducing NOx and PM the additional 90% will require more resources than the 84% and 90% already delivered
- Already are implementing a manufacturer led in-use compliance program
- Testing required in 2007 with pilot to begin in 2005
- In-use emission test 25% of our engine families per year
- Approximately 10 vehicles per family

## Emission Reduction Strategies

- Particulates and Hydrocarbons
- Oxydation Catalyst
- PM Filtration

- NOx
- Selective Catalytic Reduction (SCR)
- NOx Adsorbers
- Exhaust Gas Recirculation (EGR)
- Combustion System and Fuel Injection Equipment Improvements

## July 25 CARB HD OBD Draft Regulation 	- Concerns from a quick review

**July 25 CARB HD OBD Draft Regulation ****	****- Concerns from a quick review**

- Compliance Date of 2007 **Vehicle Model Year is specified**, not Engine Model Year
- Diagnostic Monitoring of all electrical inputs and outputs, plus major systems for:
- Engine, Aftertreatment, **Transmission and Vehicle Systems**
- Major System Monitors that are **Vehicle Dependent**
- This presents a calibration issue for items like vehicle cooling/electrical systems and transmissions

## July 25 CARB HD OBD Draft Regulation 	- Concerns from a quick review

- Engine OEM responsible for the certification process **including vehicle functions**
- OBD test cycles for validation/demonstration
- Significant pre- and post-production requirements
- Specified Scan Tool protocol and connector
**Does not allow J1939 or existing connector**
**Different service language and process** vs. today’s
- Confirmed fault, pending, readiness, continuous, non-continuous, etc.
- Emissions vs. other faults
- Impact on technician training and procedures

## Who is Responsible for OBD Certification?

**Who is Responsible for OBD Certification?**

- Engine manufacturer should be responsible for OBD on the engine and corresponding aftertreatment system
- Multiplexed sensors and systems present additional challenges
- Engine manufacturer should not be held responsible for OBD requirements beyond its expertise and influence

- Engine

- Powertrain

- Truck OEM

- Customer

## Magnitude and Complexity of OBD Work(Cummins Example)

- Bodybuilder scenario adds additional complexity

## Resources and Timing

- Significant resources are required to implement
- The Industry has insufficient leadtime to fully implement OBD compliance
- Light Duty OBD II promulgated in 1989 and implemented in 1996
- Time of over 6 years with several years prior experience on OBD I
- Current draft regulation allows 3 - 5 years for Heavy Duty

## Recommendation

- Cummins advocates a phased implementation approach to Heavy Duty in-use compliance assurance
- First phase should be the manufacturer run in-use test program
- OBD requirements should be deferred to a later phase
- Cummins would like to be involved in further discussions on the listed concerns