Numerical Investigation of the Effect of Engine Speed and Delivery Ratio on the High-Speed Knock in a Small Two-Stroke SI Engine
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.
- Record URL:
-
Supplemental Notes:
- Abstract reprinted with permission of SAE International.
-
Authors:
- Eto, Kuniyoshi
- Kuboyama, Tatsuya
- Moriyoshi, Yasuo
- Yamada, Toshio
-
Conference:
- The 26th Small Powertrains and Energy Systems Technology Conference
- Location: Himeji , Japan
- Date: 2022-10-31 to 2022-11-3
- Publication Date: 2022-1-9
Language
- English
Media Info
- Media Type: Web
- Features: References;
Subject/Index Terms
- TRT Terms: Engine knock; Engines; Spark ignition engines; Two stroke cycle engines
- Subject Areas: Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 01870489
- Record Type: Publication
- Source Agency: SAE International
- Report/Paper Numbers: 2022-32-0080
- Files: TRIS, SAE
- Created Date: Jan 23 2023 4:23PM