The two-stroke engine has a good potential for future development, especially in the field of light powered two-wheelers. The main reason consists in its advantages regarding the significantly reduced engine weight and volume compared with four-stroke-engines at the same power. The main condition for such development is the reduction of pollutant emission and bsfc to the level of modern four stroke engines. While scavenging improvements are not sufficient for this aim, an internal mixture formation is imposed. This paper presents a concept for modeling and interactive adaptation of the processes within the combustion chamber respectively within the injection system. The design of the injection system and the configuration of the combustion chamber have been optimized by means of the correlated results of both programs. The engine tests confirm this feedback strategy, showing the same HC and bsfc level as for a modern four-stroke engine for same application, but with 40% increased effective power at the same swept volume.
Gasoline direct injection for two-stroke scooter-engines concept, modeling and performances
1999
Conference paper
English
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