The trick is to keep very light pressure on the gas pedal, just enough to feed a steady amount of fuel to the engine.

技巧是在油门上轻施压力，仅够供给引擎稳定量的燃料。

youdao

In this system the crankshaft rotating Angle, where the peak combustion pressure occurs, is taken to be a feed back signal, so that the ignition timing of the engine is able to be controlled.

该控制系统利用最高燃烧压力点的曲轴转角作为反馈信号，实现其对发动机点火正时的控制。

youdao