CNG LOW EMISSION CITY BUSES

A stoichiometric Compressed Natural Gas (CNG) s.i. 9.5 litre engine with a 3-way catalyst has been developed for achieving very low emission figures. The basic engine layout is as follows: Heron type combustion chamber with gallery cooled piston; 10 compression ratio; low oil consumption; water cooled turbocharger plus waste gate; and closed loop control of the stoichiometric mixture by means of oxygen sensor. An engine configuration with a rated power output of 165 kW at 2100 rpm and a peak torque of 870 Nm at 1400 rpm has been examined. Emissions obtained under the European 13-mode procedure have been obtained. A general comparison among reciprocating internal combustion engines using different fuels (natural gas, gasoline, methanol and Diesel fuel) as far as brake thermal efficiency and carbon dioxide are concerned is presented. (A) For the covering abstract of the conference see IRRD 853181.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0852987951
• Corporate Authors:

  Mechanical Engineering Publications Limited

  P.O. Box 24, Northgate Avenue
  Bury St Edmunds, Suffolk IP32 6BW,   England 
• Authors:
  • CORNETTI, G M
  • FILIPPI, F
  • SIGNER, M
• Conference:
  • BUS '92. THE EXPANDING ROLE OF BUSES TOWARDS THE TWENTY-FIRST CENTURY. INTERNATIONAL CONFERENCE (17-19 MARCH 1992). PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS, LONDON. PAPER C437/030
• Publication Date: 1992

Language

• English

Media Info

• Features: References;
• Pagination: p. 29-38

Subject/Index Terms

• TRT Terms: Air pollution; Alternatives analysis; Buses; Catalysis; Conferences; Control; Economic efficiency; Exhaust gases; Exhaust pipes; Fuels; Gases; Methanol
• Uncontrolled Terms: Decreases; Efficiency
• ITRD Terms: 9000: Alternative; 7127: Catalysis; 1394: Catalytic converter; 8525: Conference; 3874: Control; 9009: Decrease; 5911: Efficiency; 2442: Emission; 1384: Exhaust pipe; 3850: Fuel; 6734: Gas; 7338: Methanol
• Subject Areas: Economics; Energy; Public Transportation;

Filing Info

• Accession Number: 00631886
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-85298-795-1
• Files: ITRD
• Created Date: Jul 1 1993 12:00AM