众所周知,汽车的动力来自于燃料燃烧时释放的化学能,而燃料难以完全燃烧和含有较多杂质是目前城市空气污染的主要原因。要改变空气污染的现状,关键就在于改变汽车的动力系统混合动力汽车就应运而生了。目前,这种汽车的动力形式多为汽油动力与电力的混合。油电混合车是种高效低耗的汽车配有两套发动机——电动引擎与汽油引擎。同时这种汽车还采用一种特殊系统来捕捉刹车时产生的能量并将其存储到车载电池组中。 It is well known that the driving force of a car comes from the chemical energy released when the fuel is burned. However, it is a major cause of urban air pollution that the fuel is difficult to be completely combusted and contains more impurities. To change the status quo of air pollution, the key is to change the car’s powertrain hybrid electric vehicle came into being. At present, most of the motive power of such vehicles is the mixture of gasoline power and electricity. Hybrid cars are efficient and cost-effective vehicles equipped with two sets of engines - electric and petrol engines. At the same time, this car also uses a special system to capture the energy generated when braking and store it in the car battery pack.