Small High-Speed, High-Performance Gasoline Engine

This paper describes the efforts that have been made in the pursuit of high volumetric efficiency, high thermal efficiency, and high mechanical efficiency in the Honda small high-speed gasoline engine. The problems discussed include utilization of the dynamic effects of intake and exhaust systems; combustion characteristics; concrete measures to reduce mechanical loss; and valve floating, which poses difficult problems in realizing high-speed four-stroke engine operation.