汽车滑行节油性研究

Study on Fuel-saving Performance for Automobile Sliding

长期以来,带挡滑行与脱挡滑行孰更节油,一直争论不休。根据能量守恒原则,通过合理假设,对两种滑行方式的节油性进行了分析论证,推导表明:脱挡滑行节能效果更好。在理论推导基础上,定性分析了车辆实际滑行过程的节油机理,指出:当车辆加速滑行时,采用脱挡滑行方式,可充分利用车辆惯性提升滑行节油效果;当车辆需要减速时,采用带挡滑行方式,以滑代刹,在发挥发动机制动作用的同时,利用电控发动机减速断油功能实现节油。

For a long time, it has been debated which is more fuel-efficient between sliding in neutral and sliding in gear. According to the energy conservation principle, the fuel-saving performance of the two sliding modes have been demonstrated and analyzed through reasonable hypothesis. It has been drawn that sliding in neutral is more fuel-efficient. On the basis of theoretical derivation, the fuel-saving mechanisms of automobile in actual sliding process were analyzed in quantify. It points out that, sliding in neutral can improve the fuel-saving effect by making full use of vehicle inertia while automobile pulses and glides. When automobile needs to slow down, sliding in gear is adopted and the braking is replaced with sliding to save fuel by using the function of engine braking and DFCO （deceleration fuel out off） with electronic control engine.