汽车额定功率参数的选择及测试-------外文翻译.docVIP

Rated power of motor vehicles to choose and test parameters Hyundai Motor starters all the electricity used, the function of starter is quickly and reliably start the engine, so that the normal work of the engine. Therefore, in the choice of engines, must be compatible with the identified good starter; Of course, must choose a good starter with the engine and the transmission ratio of the best fit of the battery charge level. In order to make the engine can be quickly and reliably, the starter must have sufficient power, otherwise it may not start the engine, or an increase in the number of repeat start, start-up time, the burning of starter, the fuel consumption of too many negative impact.1 starter choice of rated power parameters 1.1 engine starter drive minimum speed Starter must be launched to make the engine work a minimum speed, the rated speed is the starter, and starter of the rated power P determined by the minimum start-up engine speed n_f (unit: r / min) and huge start-up resistance M_f (unit: Nm), that is: P ≥ (M_f × n_f) / 9549.3KW.The engine is determined, start the engine torque and minimum speed start-up will have been identified. In accordance with the conditions of vaporization of gasoline engines in the 0 ~ 20 degrees starting at the minimum speed is generally 35 r / min ~ 40 r / min, at a lower temperature in order to guarantee the start-up reliability and wear and tear to consider in order to in paragraph 1 times after detonation engine can work, generally take the lowest gasoline engine start-up speed for the 50r / min ~ 70 r / min; diesel engines rely on compression ignition, the minimum start-up speed is higher. Because the speed is low, as a result of compression time, heat dissipation, increased leakage, it will cause the end of compression stroke to reduce air temperature to ignite the fuel is not easy, so the minimum starting speed diesel gasoline than the high-confidential, and its value with the form of engine vary, but generally 100 r