STUDY ON LEAN COMBUSTION; ITS EFFECT ON EMISSIONS AND SOME ACCOMPANYING PROBLEMS (PART 1). ANALYSIS OF TORCH FLAME LEAN COMBUSTION ENGINES

This paper reports tests on cvcc engines, carried out as the first phase of a study on lean combustion engines and the reduction of exhaust emissions. The results obtained are as follows: (1) the fuel consumption rates of the test engine were higher than those of a conventional engine, and even more so at low speeds; (2) in a 10-mode driving cycle more than 6% of the total oxide of nitrogen emissions occur under accelerations from 20 to 40 km/h; (3) hc emission increases at low speed (up to 20 km/h) but decreases with retarded ignition timing. Improving low speed emission seems possible if the exhaust gas temperature is kept high enough for oxidation; and (4) the ignition timing of the cvcc engine should never be changed from its normal setting if the emission levels of the various components are to be held below the required standards. /TRRL/

• Corporate Authors:

  Traffic Safety & Nuisance Research Inst, Japan

  Ministry of Transport
  Tokyo, ZZ Jpan   

  Traffic Safety & Nuisance Research Inst, Japan

  Ministry of Transport
  Tokyo, ZZ Jpan   
• Authors:
  • Yoshihara, K
  • ABE, T
  • HORI, S
  • SATO, Y
• Publication Date: 1975-3

Language

• Japanese

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 145-161
• Serial:
  • Traffic Safety & Nuisance Research Institute Rpt
  • Volume: 50
  • Issue Number: 3
  • Publisher: Traffic Safety & Nuisance Research Inst, Japan

Subject/Index Terms

• TRT Terms: Air quality management; Combustion; Exhaust gases; Flames; Fuel consumption; Hydrocarbons; Ignition; Lean fuel mixtures; Motors; Nitric oxide; Nitrogen; Nitrogen oxides; Oxides; Vehicle power plants
• Old TRIS Terms: Automobile engines; Exhaust emission control; Lean fuel engine; Torches
• ITRD Terms: 3860: Combustion; 2442: Emission; 232: Fuel consumption; 7367: Hydrocarbon; 1327: Ignition; 1334: Motor; 7128: Nitrogen; 7372: Oxide
• Subject Areas: Energy; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00163197
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: May 18 1978 12:00AM