ASSESSMENTS OF TEST CYCLE PROPOSALS. THE FIGE TRANSIENT CYCLE AND THE OICA/ACEA STEADY STATE CYCLE WITH DYNAMIC LOAD RESPONSE TEST

In this condensed report some aspects and assessments are summarised of the two proposed test cycle candidates for the future emission regulations for heavy duty engines and vehicles. These points of view are mainly based on experiences and results made during investigations at the Motortestcenter of two heavy duty engines, a 6.7 litres Volvo D7A 285 and a 9.5 litresIveco 8460, in conjunction with a number of different test cycles. A complete description of the work made by the GRPE test cycle subgroup to select appropriate cycle candidates is presented in their final report "Development of the Test Procedure for Heavy Duty Vehicles and Engines". A fully report of the investigations made at Motortestcenter will be available in February 1996. Some of the items highlighted in this report are: (1) analysis of the cycle dynamic of the FIGE transient cycle; (2) demonstration of the possibility to divide the FIGE transient cycle into three parts, each representing different driving patterns with separate emission measurements; (3) experiences and results from opacity measurements using the OICA/ACEA dynamic load response test; (4) impact of cycle load on exhaust temperature and operating conditions for aftertreatment equipment; and (5) results from temperature measurements of a CRT (continuously regenerating trap) filter using the FIGE transient cycle and the OICA/ACEA (International Organization of Motor Vehicle Manufacturers/Association of European Car Manufacturers) steady state cycle. To ease the implementation of future regulations regarding new engine technologies and fuels it is concluded that the obvious choice is a transient test cycle, representing a real driving pattern. The FIGE cycle is a good candidate for this choice, although in some parts it needs further smoothening. A proposal is made to modify the definition of the FIGE transient test cycle to prevent cycle by-pass. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/11030240
• Corporate Authors:

  AB Svensk Bilprovning Motortestcenter

  Box 223
  Haninge,   Sweden 
• Authors:
  • HEDBOM, A
• Publication Date: 1995

Language

• English

Media Info

• Pagination: 27 p.
• Serial:
  • MTC RAPPORT
  • Issue Number: MTC 9511A
  • Publisher: AB Svensk Bilprovning Motortestcenter
  • ISSN: 1103-0240

Subject/Index Terms

• TRT Terms: Measurement; Motors; Pollutants; Test procedures; Trucks
• Geographic Terms: Sweden
• ITRD Terms: 2442: Emission; 1236: Lorry; 6136: Measurement; 1334: Motor; 8109: Sweden; 6288: Test method
• Subject Areas: Environment; Motor Carriers;

Filing Info

• Accession Number: 00739134
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Aug 28 1997 12:00AM