Advanced Rapid Combustion Concept Using Autoignition Assisted Flame for High Compression Ratio SI Engines

Author:

Sasaki Yuta1,Hori Junki2,Seto Masatoshi2,Fujikawa Tatsuya2,Morii Youhi3,Nakamura Hisashi3,Maruta Kaoru3

Affiliation:

1. Mazda Motor Corporation Graduate School of Engineering, Toho

2. Mazda Motor Corporation

3. Institute of Fluid Science, Tohoku University

Abstract

<div class="section abstract"><div class="htmlview paragraph">To achieve higher thermal efficiency for spark- ignition (SI) engines, advanced rapid combustion technology under high compression ratio is needed. The results of single-cylinder preliminary engine tests using E.U. commercial fuel at 96 RON show that the higher the compression ratio, the faster the combustion speed. Additional engine test and computations using S5R five-component surrogate gasoline with reliable chemistry under various temperature and pressure conditions implied that the autoignition assisted flame played significant role under higher compression ratio conditions, i.e., high temperature and pressure conditions, where apparent increases in laminar flame speeds compared to conventional combustion.</div></div>

Publisher

Society of Automotive Engineers of Japan

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