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Summary & Details

Numerical Investigation of the Effect of Engine Speed and Delivery Ratio on the High Spee d Knock in a Small Two S troke S I Engine

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Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20229080

Paper/Info type: SETC

No.2022-32-0080

Pages: 1-5(Total 5 p)

Date of publication: Oct 2022

Publisher: JSAE

Language: English

Event: SETC2022

Detailed Information

Author(E)	1) Kuniyoshi Eto, 2) Tatsuya Kuboyama, 3) Yasuo Moriyoshi, 4) Toshio Yamada
Affiliation(E)	1) Chiba University, Sustainable Engine Research Center CO., Ltd., 2) Chiba University, Sustainable Engine Research Center CO., Ltd., 3) Chiba University, Sustainable Engine Research Center CO., Ltd., 4) Chiba University, Sustainable Engine Research Center CO., Ltd.
Abstract(E)	Knocking occurs within the high-speed range of small two-stroke engines used in handheld work equipment. High-speed knock may be affected by the engine speed and delivery ratio. However, evaluation of these factors independently using experimental methods is difficult. Therefore, in this study, these factors were independently evaluated using numerical calculations. The purpose of this study was to clarify the mechanism by which the intensity of high-speed knocking that occurs in small two-stroke engines becomes stronger. The results suggest that temperature inhomogeneity due to insufficient mixing of fresh air and previously burned gas may induce high-speed knocking in the operating range at high engine speeds.

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