Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Analysis of Compression Ignition Combustion in a Schnurle-Type Gasoline Engine - Comparison of performance between direct injection and port injection systems -

  • Kim, Seok-Woo (Graduate School of Science and Technology, Chiba University) ;
  • Moriyoshi, Yasuo (Dept. of Electronics and Mechanical Engineering, Chiba University)
  • Published : 2004.08.01
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Abstract

A two-stroke Schnurle-type gasoline engine was modified to enable compression-ignition in both the port fuel injection and the in-cylinder direct injection. Using the engine, examinations of compression-ignition operation and engine performance tests were carried out. The amount of the residual gas and the in-cylinder mixture conditions were controlled by varying the valve angle rate of the exhaust valve (VAR) and the injection timing for direct injection conditions. It was found that the direct injection system is superior to the port injection system in terms of exhaust gas emissions and thermal efficiency, and that almost the same operational region of compression-ignition at medium speeds and loads was attained. Some interesting combustion characteristics, such as a shorter combustion period in higher engine speed conditions, and factors for the onset of compression-ignition were also examined.

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References

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