Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p84
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 84/150)
Character Range: 961558–964637

7.1.2. of this annex using the qualified deteriorated component that is qualified for use with the parent engine.

                   Annex 9B - Appendix 8 Demonstration requirements in case of performance monitoring of a wall-flow diesel particulate filter
A.8.1.  General
A.8.1.1.  This Appendix specifies the OBD demonstration process applicable in the case where the filtering process of a wall-flow diesel particulate filter (DPF) is subject to performance monitoring.
A.8.1.1.  A deteriorated wall-flow DPF can be created, for example, by drilling holes into the DPF substrate or by grinding the end caps of the DPF substrate.
A.8.2.   Qualification test
A.8.2.1.  Principle
A.8.2.1.1.  A deteriorated wall-flow DPF is considered as a "Qualified Deteriorated Component" if, under the operating conditions of the engine specified for the purpose of that test, the pressure drop ("delta pressure") across that deteriorated wall-flow DPF exceeds or is no less than 60 per cent of the pressure drop measured across a clean and non-deteriorated wall-flow DPF of the same type.
A.8.2.1.1.1.  The manufacturer shall demonstrate that this clean and non-deteriorated wall-flow DPF leads to the same back-pressure as the deteriorated one before its deterioration.
A.8.2.2.  Qualification process
A.8.2.2.1.  For qualifying a deteriorated wall-flow DPF, the engine equipped with that wall-flow DPF shall be operated under stabilised steady-state conditions, set at the speed and load values specified for mode 9 in the WHSC test cycle specified in Annex 4 to this Regulation (55 per cent normalised speed and 50 per cent normalised torque).
A.8.2.2.2.  To qualify a deteriorated wall-flow DPF as a "Qualified Deteriorated Component", the manufacturer shall demonstrate that the pressure drop across that deteriorated wall-flow DPF, measured when the engine system is operated under the conditions specified in paragraph A.8.2.2.1., is no less than the percentage of the pressure drop across a clean and non-deteriorated DPF under the same conditions which is applicable in accordance with paragraphs A.8.2.1.1. and A.8.2.1.2. of this appendix.
A.8.2.3.  Demonstration of the OBD performance
A.8.2.3.1.  The demonstration of the OBD performance shall be conducted in accordance with the requirements of paragraph 7.1.2. of this annex with the qualified deteriorated wall-flow DPF mounted on the parent engine system.

          Annex 9C Technical requirements for assessing the in-use performance of on-board diagnostic systems (OBD)
1.  Applicability
 In its current version, this annex is only applicable to road-vehicles equipped with a compression-ignition engine.
2. Reserved
3.  Definitions
3.1. "In-Use performance ratio"
 The in-use performance ratio (IUPR) of a specific monitor m of the OBD system is: IUPRm = Numeratorm / Denominatorm
3.2. "Numerator"
 The numerator of a specific monitor m (Numeratorm) is a counter indicating the number of times a vehicle has been operated such that all monitoring conditions necessary for that specific monitor to detect a malfunction