Schemes of variablecompressionratio (VCR), variable exhaust gas recirculation (EGR), variable exhaust valve timing, and EGR with stratification by tumble charge flow are recommended.
The pump features a variable discharge port design which adjusts automatically to the internal compressionratio of the vacuum pump resulting in maximum efficiency throughout the vacuum range.
我们公司生产的液环真空泵，具有不同的出料口，自动调节内部压缩率，已达到最大的真空效率。
3
The potentials to extend the operating range of HCCI engines through two strategies, i. e. variablecompressionratio and boost, were investigated.