In this study, an improvement of fuel consumption by changing the exhaust timing of a two-stroke engine has been made. The study results revealed that a remarkable improvement of fuel economy is possible by controlling the exhaust timing according to the engine speed. The reason for the better fuel economy was clarified through an analysis of exhaust gases, theoretical cycle calculations, and an analysis of combustion pressure. As an example of actual application, the results of tests made on an engine equipped with Yamaha power Valve System (YPVS), which is a variable exhaust timing mechanism using a tabor-shaped valve, will also be discussed.
Improvement of Fuel Consumption with Variable Exhaust Port Timing in a Two-Stroke Gasoline Engine
Sae Technical Papers
SAE International Congress and Exposition ; 1985
1985-02-01
Conference paper
English
Improvement of fuel consumption with variable exhaust port timing in a two-stroke gasoline engine
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