GREEN LIGHT FOR VOLVO'S CITY FRIENDLY TRUCKS

This article describes the clean air filter (cityfilter) fitted by Volvo to its diesel urban delivery trucks which will be in service in Sweden by the end of 1989. Particulate emissions are said to be reduced by 80%, and emissions of hydrocarbons and carbon monoxide by 60% and 50% respectively. The cityfilter contains a ceramic filter with a catalytic coating which facilitates the burning of filtered soot during regeneration, and which, during operation, oxidizes the hydrocarbons and carbon monoxide in the exhaust emissions. During operation, the diesel particulates are trapped in the filter. This filtered soot is burned off between periods of operation with the engine switched off by connecting the filter to an external source of electricity. The built-in electric heating element in the filter heats up the filter insert and ignites the soot particles. An air pump supplies the correct amount of oxygen throughout this regeneration process, which takes about 3 hours. The cityfilter has an estimated service life of 300000 km and an operating range of about 300 km. Trucks stand still 70-80% of the 8-10 hours/day that they are used, and driving distances are short, and so their limitations have no effect on productivity. External noise levels are also reduced by the system to levels required by the eec in 1990. (TRRL)

• Corporate Authors:

  ROAD HAULAGE ASSOCIATION LTD

  ROADWAY HOUSE, 35 MONUMENT HILL
  WEYBRIDGE, SURREY  United Kingdom  KT13 8RN
• Authors:
  • -
• Publication Date: 1989-8

Language

• English

Media Info

• Pagination: p. 37
• Serial:
  • ROAD WAY
  • Volume: 55
  • Issue Number: 8

Subject/Index Terms

• TRT Terms: Carbon monoxide; Catalysis; Ceramic materials; Delivery vehicles; Diesel engines; Exhaust gases; Exhaust pipes; Filters; Hydrocarbons; Sound level
• Uncontrolled Terms: Decreases
• ITRD Terms: 7391: Carbon monoxide; 7127: Catalysis; 4507: Ceramic; 9009: Decrease; 1234: Delivery vehicle; 1314: Diesel engine; 2442: Emission; 1384: Exhaust pipe; 7182: Filter; 7367: Hydrocarbon; 6747: Sound level
• Subject Areas: Motor Carriers; Vehicles and Equipment;

Filing Info

• Accession Number: 00499368
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM