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Torque Boosting of 4-Stroke Cycle Spark-lgnition Engine in Low and Middle Engine Speed Ranges by Crankcase-Supercharging
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1984 by SAE International in United States
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As a mechanical supercharging system for 4-stroke cycle engines, crankcase-supercharging seems attractive because of its low production cost and simple construction. Therefore, a crankcase-supercharged 4-stroke cycle spark-ignition engine was developed and tested in both motoring and firing modes.
It was found that the motoring volumetric efficiency could be increased over the entire engine speed range, but the increase was more noticeable at lower engine speeds. In the firing mode it was proved that a favorable throttle response and a 20 to 30% torque rise could be obtained by crankcase-supercharging without sacrificing the brake specific fuel consumption of the naturally aspirated baseline condition.
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- Naoki Okanishi - Div. of Mechanical and Transporation Engineering, The Institute of Vocational Training, (Japan)
- Itaru Fukutani - Div. of Mechanical and Transporation Engineering, The Institute of Vocational Training, (Japan)
- Eiichi Watanabe - Div. of Mechanical and Transporation Engineering, The Institute of Vocational Training, (Japan)
CitationOkanishi, N., Fukutani, I., and Watanabe, E., "Torque Boosting of 4-Stroke Cycle Spark-lgnition Engine in Low and Middle Engine Speed Ranges by Crankcase-Supercharging," SAE Technical Paper 840423, 1984, https://doi.org/10.4271/840423.
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