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A Study of the Delivery Ratio Characteristics of Crankcase-Scavenged Two-Stroke Cycle Engines

1969; Linguagem: Inglês

10.4271/690136

2688-3627

Kazunari Komotori, Eiichi Watanabe,

Vehicle emissions and performance

THE OUTPUT CHARACTERISTICS of two-stroke cycle engines are determined mainly by the charging efficiency which is a product of the delivery ratio and the trapping efficiency. With the same scavenging system, there i s l i t t le difference in trapping efficiency at a specified delivery rat io . (1) Therefore, the output characteristics of crankcase -scavenged two -stroke cycle engines with the same scavenging system depend chiefly on the delivery ratio. When these engines are used as prime movers of motorscooters or auromobiles, it is usually not required to have the tuning effects from the inlet and/or exhaust pipe sysrems because of their vehicle characteristics. Under these