In most of the world, light duty vehicles and the engines used in heavy duty vehicles are designed to comply with legal limits for exhaust emissions. The manufacturer must demonstrate that this i case by submitting vehicles or engines for testing. There is considerable evidence, though, that many vehicles operating on th roads would not achieve the appropriate emission standards. Perha the main reason for this is inadequate maintenance of the vehicle if the engine settings are not in accordance with manufacturers' specifications, it is not surprising that their performance deteriorates. Methods of addressing this problem include require on manufacturers to produce durable and stable components and a compulsory periodic test for vehicles in use. This paper reviews information on emissions from road vehicles in service and how th are related to the vehicle's condition and state of maintenance. often conflicting criteria for in-service testing are discussed w reference to a number of current and potential test procedures.

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    Radarweg 29
    Amsterdam,   Netherlands  1043 NX
  • Authors:
    • HICKMAN, A J
  • Publication Date: 1994


  • English

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Filing Info

  • Accession Number: 00715985
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD,
  • Created Date: Jan 31 2000 12:00AM