Numerical Investigation of the Effect of Engine Speed and Delivery Ratio on the High-Speed Knock in a Small Two-Stroke SI Engine

2022-32-0080

01/09/2022

Features
Event
The 26th Small Powertrains and Energy Systems Technology Conference
Authors Abstract
Content
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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DOI
https://doi.org/10.4271/2022-32-0080
Pages
5
Citation
Eto, K., Kuboyama, T., Moriyoshi, Y., and Yamada, T., "Numerical Investigation of the Effect of Engine Speed and Delivery Ratio on the High-Speed Knock in a Small Two-Stroke SI Engine," SAE Technical Paper 2022-32-0080, 2022, https://doi.org/10.4271/2022-32-0080.
Additional Details
Publisher
Published
Jan 9, 2022
Product Code
2022-32-0080
Content Type
Technical Paper
Language
English