The engine is the internal energy into the kinetic energy of the body, the car engine has three cylinders, four cylinders, five cylinders, six cylinders, eight cylinders, twelve cylinders, and more cylinders. The engine has a front and rear two, there are divided into inline engine, the level of the engine, V-type engine. The form of the car engine is mainly the cylinder and the piston as the conversion mechanism of the internal combustion engine. According to the different forms of fuel and ignition can be divided into gasoline engine or diesel engine, or with hydrogen, natural gas, oil and gas fuel for the engine, the combustion form and gasoline engine difference is small. According to the work cycle and piston stroke characteristics of the division, but also divided into two-stroke and four-stroke engine. The company sells the engine scrap pieces, are imported back to the import, are safe to use after the car.