Project: An In-Service Emissions Test For Spark Ignition Petrol Engines

Reference: S9911/TC

Last update: 11/05/2004 10:16:17

Objectives

The objectives of this project are to:
* conduct a literature survey of non-DETR research on in-service emissions testing,
* define the level of emissions from a catalyst-equipped vehicle which should be considered unacceptable,
* assess the effectiveness of the current test at identifying vehicles emitting this level of pollutants, and
* if necessary, propose and evaluate a variety of options for a new, more effective test, resulting in the development of a test protocol and equipment specification for a new in-service test for catalyst equipped cars.

Description

A high proportion of the vehicle fleet now consists of catalyst equipped petrol engined cars. The current MOT test involves checking a vehicle's emissions at low and high idle only. It is unclear how well the results of these tests represent emissions when the vehicle is being driven. For this reason the ability of this test to detect excessive on the road emissions from catalyst equipped vehicles needs to be assessed.

The project will consider the capabilities of current and future test equipment taking into account the findings of previous UK research on MOT emissions data, including consideration of the detection of oil burning in catalyst equipped vehicles project (S361D/VB). The project is very similar in scope and structure to research on improving the in-service emissions testing of diesel vehicles, being managed by the Vehicle Inspectorate.

Contractor(s)

AEA Technology Environment
Harwell Business Centre, Didcot, Oxfordshire, OX11 0QJ
+44 (0)1235 432201

Contract details

Cost to the Department: £350,000.00

Actual start date: 01 March 2001

Expected completion date: 30 June 2005

Publication(s)

AEAT/ENV/R/0679. Phase 1 Report - Definition of an Excess Emitter and Effectiveness of Current Annual Test
Author: AEA Technology Environment
Publication date: 01/06/2001
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/026. Phase 2a Report - Evaluation of the Significance of On Board Diagnostic/On Board Measurement Systems
Author: EMStec
Publication date: 01/09/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/027. Phase 2b Report - Identification of Options for Alternative Test Procedures
Author: EMStec
Publication date: 01/12/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/027. Phase 2b Report Appendix 1. Technologies Available for Measuring NOx
Author: EMStec
Publication date: 01/12/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/027. Phase 2b Report Appendix 2. Review of Test Procedures
Author: EMStec
Publication date: 01/12/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/027. Phase 2b Report Appendix 3. Determination of the Origins of Excess NOx Emitters and Their Repair
Author: EMStec
Publication date: 01/12/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk

EMStec/02/027. Phase 2b Report Appendix 4. Details of the Cost Effectiveness Calculations
Author: EMStec
Publication date: 01/12/2002
Unpublished
Source: Contact: stephen.mcfarlane@dft.gsi.gov.uk