稀薄混合气 meaning in English

weak mixture

Llc lean limit control
稀薄混合气极限控制器
Moreover , it has been pointed out that the hydrogen engine used in ? cylinder injection with high pressure can increase volumetric efficiency and compression ratio , - therefore , the performance indexes in this engine , such as output power , thermal efficiency , range of thickness of mixture with normal operation and nox emission , can be improved , and it is possible for the engine to realize rapid combustion of thin mixture , so abnormal combustion , such as backfire , pre ? ignition , can be controlled effectively
指出了采用内部混合气形成方式且高压喷射的氢发动机，有利于提高充气效率和压缩比，从而改善发动机的动力性和经济性；有利于扩展发动机正常工作的浓度范围；并且有利于实现稀薄混合气快速燃烧，从而可以有效地抑制早燃、回火及爆燃等异常燃烧和no _ x排放量。试验指出了发动机的点火正时、喷射正时及喷氢量对发动机的性能、异常燃烧、 no _ x排放量有很大影响。