点燃式发动机紊流型燃烧室的设计与研究

Turbulence Combustion Chamber for Spark-Ignition Engines

摘要本文提出了一种组织点燃式发动机稀燃速燃的紊流型燃烧室,在一台自行设计改装的单缸试验机上对浴盆型、碗型、火球型、紧凑型、紊流型等五种燃烧室进行了对比试验研究,获得了采用不同燃烧室时发动机的性能、排放指标和燃烧特性参数,结果表明采用紊流型燃烧室时发动机具有最佳的综合性能指标,外特性燃油消耗率曲线平坦,最低油耗率为260g/(kW·h),HC、CO排放下降,动力性能和操纵性能得到改善.

A turbulence combustion chamber promoting fast burning of lean air-fuel mixture in spark-ignition engines was proposed. Comparative tests were made among bathtub chamber, bowl-in-piston, May-precess, HRCC in head, and turbulencc chamber on a self-modified single-cylinder test engine. Performance, exhaust emissions and combustion characteristics of the engine with above-menitioned combustion chambers were measured and results showed that proposed turbulence combustion chamber gave the best comprehensive performance: power output was increased, driveability was improved.BSFE curve at WOT condition was flat and lowest BSFE went down to 260 g/(kW·h), and HC and CO emissions were low.