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对于汽油机来说,其部份负荷工况下的实际工作循环更加偏离理想循环,因此其有效效率显著降低。为减少节气门调节时的损失,联邦德国大众汽车公司研究了可变进气门关闭时间和可变压缩比的影响,并据此设计出具有可变配气相位和可变压缩比的汽车用汽油机,本文将介绍这种发动机的设计方案和试验结果。
For a gasoline engine, the actual duty cycle under partial load conditions deviates further from the ideal cycle, so its effective efficiency is significantly reduced. In order to reduce the loss of throttle adjustment, the Federal Republic of Germany Volkswagen studied the variable intake valve closing time and the impact of variable compression ratio, and accordingly designed with variable valve timing and variable compression ratio for automotive Gasoline engine, this article will introduce the design of this engine and test results.