IN-USE COMPLIANCE TESTING OF HDV IN GERMANY

Although in-use compliance testing for cars has now been anchored in the new 98/69/EC directive, only individual programs have been conducted in various European states for heavy duty vehicles (HDV). The lowering of the limits for heavy duty vehicles will make exhaust-gas after-treatment necessary for these vehicles too, as from 2005 at the latest (EURO IV). Monitoring of the emission level is necessary throughout the vehicle's service life, in order to keep the emissions reductions achieved stable. For cost reasons, checking of adherence to exhaust-gas limits is performed in the case of heavy duty vehicles on roller dynamometers, whereas type-testing is conducted on engine test beds. Comparability between these two methods has been verified and the characteristics data of drive-train resistance and other losses, necessary for calibration of the test system, have been determined. Vehicle selection and procurement are central factors in ensuring the fleet-related representative nature of in-use compliance testing. In the case of inspection on a roller dynamometer, attention must be devoted to conformity with the type-test. which is achieved in some cases only approximately. Harmonisation at the vehicle preparation and measuring system level has been optimised. A simplified procedure using the full-load consumption has been developed for determination of the load points in the 13-stage test. Inspection of the first vehicles revealed only one irregularity in particle emissions, which need to be checked on two more vehicles with the same type of engine. Measurement of further characteristics diagrams indicate the rationality of modification to a new steady-state measuring cycle as from the year 2000 (EURO III). Even at this point in time, numerous important discoveries for in-use compliance testing of heavy duty vehicles have been made. (A) For the covering abstract see IRRD E101903.

• Corporate Authors:

  Technical University Graz

  Institute for Internal Combustion Engines and Thermodynamics, Inffeldgrasse 25
  A-8010 Graz,   Austria 
• Authors:
  • PISCHINGER, R
  • MOTZKAU, M
  • NIEDERLE, W
• Conference:
  • PROCEEDINGS OF THE EIGHTH INTERNATIONAL SYMPOSIUM TRANSPORT AND AIR POLLUTION INCLUDING COST 319 FINAL CONFERENCE, GRAZ, AUSTRIA, 31 MAY - 2 JUNE 1999
• Publication Date: 1999

Language

• English

Media Info

• Features: References;
• Pagination: p. 217-28
• Serial:
  • Volume: 76

Subject/Index Terms

• TRT Terms: Exhaust pipes; Measurement; Pollutants; Standards; Trucks
• Geographic Terms: Europe
• ITRD Terms: 2442: Emission; 8034: Europe; 1384: Exhaust pipe; 1236: Lorry; 6136: Measurement; 187: Specification (standard)
• Subject Areas: Environment; Motor Carriers;

Filing Info

• Accession Number: 00768748
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Sep 10 1999 12:00AM