TWO STROKE GASOLINE ENGINE HAVING SMALL TOXIC EMISSIONS

In an effort to reduce its characteristic toxic emissions of carbon monoxide and unburned hydrocarbons, a new two-stroke gasoline engine design was tested which features clean-air scavenging of cylinders and internal mixture control by blowing the rich mixture into the cylinder. The rich mixture combined with the residual air from scavenging forms a more completely combustible mixture. Three testing units were used: the model engine, the experimental engine, and the working engine having 50 cc working capacity and an integrated control for air flow through both systems and for fuel control. Although a divided combustion chamber was investigated, only experimental results with an undivided combustion space on all three units are presented. The following characteristics were noted: the working characteristic of the engine expressed by the torque curve or mean effective pressure versus the speed at full load is distinctively a flexible characteristic; there is an intensive torque decrease with increasing speed of rotation. No special control of thee scavenging air flow is necessary because of the piston compressor. There is a great reduction of residual gases in the working medium; the combustion process is identical to that in the four-stroke engine.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Presented at SAE Congress and Exposition, Detroit, 26 February-2 March 1979.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Pavletic, R
• Publication Date: 1979

Media Info

• Features: References;
• Pagination: 14 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: Air; Combustion; Exhaust gases; Flow; Torque; Two stroke cycle engines
• Uncontrolled Terms: Air flow
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00386866
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 790486, HS-029 269U
• Files: HSL, USDOT
• Created Date: Jul 30 1984 12:00AM