COMBUSTION CHAMBER DESIGN FOR OPTIMUM SPARK-IGNITION ENGINE PERFORMANCE

Three distinct factors control the combustion process in a spark-ignition engine: chamber geometry and plug location; the mean motion of the charge and its turbulence characteristics; and the combustion chemistry of the fuel-air mixture. Our current understanding of these interactions is now sufficient to provide a rational procedure for combustion chamber optimization. The goals of such a procedure are to achieve fast, stable and repeatable combustion, cycle-by-cycle, with high volumetric efficiency and minimum heat transfer to the combustion chamber walls. It is shown that the primary design objective should be the best feasible combustion chamber geometry, with good distribution of the fuel, air and EGR mixture. This provides the desired benefits, with no operating penalties. Then, if additional combustion stability is still required to absorb the high EGR rates or additional air required for emission control or efficiency gains, increased turbulence should be employed. However, use of excess turbulence results in reduced volumetric efficiency and higher than necessary heat transfer. (Author/TRRL)

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

  Inderscience Enterprises Limited

  La Motte Chambers
  St Helier, Jersey,   England 
• Authors:
  • Heywood, J B
• Publication Date: 1984-5

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 336-357
• Serial:
  • International Journal of Vehicle Design
  • Volume: 5
  • Issue Number: 3
  • Publisher: Inderscience Enterprises Limited
  • ISSN: 1477-5360
  • Serial URL: http://www.inderscience.com/jhome.php?jcode=IJVD

Subject/Index Terms

• TRT Terms: Combustion; Combustion chambers; Design; Economic efficiency; Engine performance; Engines; Exhaust gas recirculation; Exhaust gases; Fuel air mixtures; Fuel consumption; Heat transfer; Improvements; Motors; Spark ignition engines; Turbulence; Vehicle design
• Uncontrolled Terms: Efficiency
• Old TRIS Terms: Engine design
• ITRD Terms: 3860: Combustion; 9011: Design (overall design); 5911: Efficiency; 2442: Emission; 232: Fuel consumption; 9108: Improvement; 1334: Motor
• Subject Areas: Design; Economics; Energy; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00388876
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Report/Paper Numbers: HS-037 378
• Files: HSL, ITRD, TRIS
• Created Date: Oct 30 1985 12:00AM