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Experimental Investigation of Two Stroke Direct Injection Spark Ignition Engine

[+] Author Affiliations
K. D. Sapate

Trinity College of Engineering and Research, Pune, Maharashtra, India

A. N. Tikekar

Walchand College of Engineering, Sangali, Maharashtra, India

Paper No. IMECE2014-37879, pp. V012T15A015; 4 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 12: Transportation Systems
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4961-3
  • Copyright © 2014 by ASME


From its inception, the two-stroke cycle SI engine has been criticized for its high specific fuel consumption and too high level of emission of unburnt hydrocarbon (HC) and carbon monoxide (CO) during scavenging. These engines are used mainly due to its positive advantages of simplicity, low cost, higher power to weight ratio, low maintenance etc. for example, in two wheelers, outboard motor boats etc. In the present innovation, fuel is injected through injector mounted on the cylinder block facing spark plug, directly into the cylinder after closing both the inlet end exhaust port. The quantity of fuel injection is decided by developed electronic fuel injection control circuit based on two important parameters of engine namely load and speed. In this circuit, two input sensors namely throttle position sensor and speed & crank sensor is used along with developed software to control the quantity of fuel injection. After long experimentation with different locations of injector, sensors, etc., for selected two stroke engine, it has been observed that the power output has improved by 5%, reduction of fuel consumption by 20%, a reduction of HC and CO by 35% and 25% respectively, in injection mode.

Copyright © 2014 by ASME



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