IMPROVEMENT OF FUEL CONSUMPTION WITH VARIABLE EXHAUST PORT TIMING IN A TWO-STROKE GASOLINE ENGINE

In this study, an improvement of fuel consumption by changing the exhaust timing of a two-stroke engine has been made. The study results revealed that a remarkable improvement of fuel economy is possible by controlling the exhaust timing according to the engine speed. The reason for the better fuel economy was clarified through an analysis of exhaust gases, theoretical cycle calculations, and an analysis of combustion pressure. As an example of actual application, the results of tests made on an engine equipped with Yamaha Power Valve System (YPVS), which is a variable exhaust timing mechanism using a tabor-shaped valve, will also be discussed.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • International Congress and Exposition, Detroit, Michigan, February 25-March 1, 1985.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Nomura, K
  • Hirano, S
  • GOTOH, T
  • Motoyama, Y
• Publication Date: 1985

Media Info

• Features: Figures; References;
• Pagination: 9 p.
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Exhaust gases; Fuel consumption; Improvements; Two stroke cycle engines; Valve timing
• Old TRIS Terms: Engine timing; Test results
• Subject Areas: Energy; Safety and Human Factors;

Filing Info

• Accession Number: 00450921
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 850183, HS-038 965
• Files: HSL, USDOT
• Created Date: Dec 31 1985 12:00AM