INFLUENCE OF OPERATING VARIABLES AND PRECHAMBER SIZE ON COMBUSTION IN A PRECHAMBER STRATIFIED-CHARGE ENGINE

The prechamber stratified-charge engine is a low emission, efficient alternative to the conventional homogeneous-charge, spark-ignition engine. The prechamber stratified-charge, spark-ignition engine. The prechamber stratified-charge concept extends the operating range of the spark-ignition engine to leaner overall air/fuel ratios than can be achieved by the conventional design. This paper describes the results of experimental and computer simulation studies of the combustion process in the prechamber three-valve stratified-charge engine. Prechamber and main-chamber pressure data and matched computer simulation calculations are used to determine the effects of variations in overall air/fuel ratio, engine speed and load, and prechamber volume and orifice diameter on the parameters which define the combustion process (spark advance for optimum torque, ignition delay, combustion duration), on cylinder pressure diagrams (mean main-chamber pressure, mean pressure difference across the orifice, and cycle-by-cycle pressure fluctuations) and on exhaust emissions.

• Supplemental Notes:
  • Preprint from the 13-16 November 1978 Meeting.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Wall, J C
  • Heywood, J B
• Publication Date: 1978

Media Info

• Features: References;
• Pagination: 24 p.
• Serial:
  • Society of Automotive Engineers Preprint
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Combustion; Combustion chambers; Exhaust gases; Fuel air mixtures; Simulation; Spark ignition engines; Stratified charge engines; Variables; Vehicle power plants
• Uncontrolled Terms: Air fuel ratio
• Old TRIS Terms: Automobile engines; Stratified-charge combustion
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00195306
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: SAE 780966
• Files: TRIS
• Created Date: Aug 15 1979 12:00AM