这种模式在下坡时更有用，这时的效果与引擎制动相似。
This can be useful when going downhill, where the effect is similar to engine braking.
对客车行驶时发动机制动的下坡能力进行了试验和理论分析，结果表明客车下坡行驶时通过发动机制动可以在部分坡度的坡道上满足汽车正常行驶的要求。
The experiment and theory analysis on the ability were carried out, the results show that it can meet the demands for bus to travel on some sloping hillside by engine braking.
对客车下坡行驶时排气制动的能力进行试验和理论研究。
The thesis makes experiment and theory analysis on ability of the exhaust braking when a bus goes downhill.
应用推荐