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Effect of Temperature Distribution of Air-Fuel Mixture on Knocking Intensity in a Rapid Compression and Expansion Machine
Published May 23, 2012 by Society of Automotive Engineers of Japan in Japan
As a sharp rise of in-cylinder pressure caused by spontaneous ignition of unburned air-fuel mixture is an important factor affecting the knocking occurrence and its intensity, the authors assumed that reducing the pressure rise rate could inhibit a severe knocking. The present study focuses on understanding the effects of temperature distribution of air-fuel mixture on knocking intensity in a rapid compression and expansion machine. Four patterns of spatial temperature distribution of air-fuel mixture were designed to investigate the influence of knocking intensity. As a result, a large temperature stratification of air-fuel mixture could reduce the knocking intensity.