URBAN AIR QUALITY IMPROVEMENT BY USING A CNG LEAN BURN ENGINE FOR CITY BUSES

The use of compressed natural gas (CHG)-fuelled lean-burn city bus engines has a significant potential for air quality improvement in urban areas. Particularly important is the reduction of NOx, as well as particulate and non-regulated HC-emissions. For this reason, a CNG-fuelled, lean-burn, turbo-charged, intercooled engine equipped with catalytic converter was developed. The basic engine is a 6-cylinder, heavy duty, serial production Hungarian diesel engine which complies with Euro-2 emissions limits. The objective of this development was to meet European emission limits forecast for the year 2005 (NOx less than 3.0 g/kWh CO and HC less than 0.6 g/kWh). Furthermore, it was necessary to fulfil the heavy-duty requirements regarding performance behaviour, driveability and reliability. To achieve these requirements, a careful optimization of the main control parameters was carried out. On the basis of test bench results, low emissions and favourable fuel consumption capability of the engine are reported. Based on the evaluation of economical feasibility, the costs of CNG bus operation is additionally discussed. It can be concluded that CNG city bus operation is - compared to diesel operation - a promising way to improve economically the local air quality. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14775360
• Corporate Authors:

  Inderscience Enterprises Limited

  World Trade Center Building, 110 Avenue Louis Casai
  Geneva,   Switzerland 

  Inderscience Enterprises Limited

  World Trade Center Building, 110 Avenue Louis Casai
  Geneva,   Switzerland 

  Inderscience Enterprises Limited

  World Trade Center Building, 110 Avenue Louis Casai
  Geneva,   Switzerland 
• Authors:
  • MERETI, T
  • VAN LING, JAN
  • HAVENITH, C
• Publication Date: 1998

Language

• English

Media Info

• Features: References;
• Pagination: p. 240-52
• Serial:
  • International Journal of Vehicle Design
  • Volume: 20
  • Issue Number: 1-4
  • Publisher: Inderscience Enterprises Limited
  • ISSN: 1477-5360
  • Serial URL: http://www.inderscience.com/jhome.php?jcode=IJVD

Subject/Index Terms

• TRT Terms: Air; Burning rate; Buses; Engines; Environment; Fuel consumption; Gases; Lean fuel mixtures; Pollutants; Quality control; Urban areas
• Uncontrolled Terms: Quality
• ITRD Terms: 6714: Air; 1272: Bus; 2442: Emission; 2455: Environment; 232: Fuel consumption; 6734: Gas; 1335: Lean burn (engine); 1334: Motor; 9063: Quality; 313: Urban area
• Subject Areas: Energy; Public Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00758309
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, ATRI
• Created Date: Jan 25 1999 12:00AM