北京bj2020s型汽车改装设计.doc

北京BJ2020S型汽车改装设计 摘要 本文讨论了对驾校使用的汽车进行改装,将北京BJ2020S型汽车的发动机拆除,换装电动机。 驾校使用的汽车行驶速度只需2~3kmph,走走停停,导致发动机效率极低,并且污染严重。而且随着近年来油价的急剧上涨,使用汽油的成本太高。因此希望用电动机来代替发动机驱动汽车。这样既可以降低汽车的使用成本,也可以减少污染。 由于电动机与发动机的动力特性不同,所以改装涉及了多个方面,包括电机的选用,传动系统的改装,线路的设计及用电安全．本文中改装的汽车为驾校训练使用，要求行驶速度为２～３kmph．根据这一要求得出驱动汽车所需力矩和功率，据此选择电动机．由电动机输出转速确定传动比，从而改装传动系统．最后考虑供电线路的布置及用电安全． 关键词:驾驶训练、汽车改装、电动车、 THE REFIT OF BEIJING JEEP BJ2020S 　　　　　　　　　　　 Abstract We discuss the refit of BeiJing Jeep BJ2020s in this paper.Remove the engine,change a motor instead. The jeep used in the driving school is driving at the speed of only 2~3 kmpf .It is result that the power of the engine runs low ,and it pollute much .In recent years ,the price of the oil is too high ,so using oil in training become very expensive .As a result ,we hope that motor can be used in the jeep instead of the engine .In this way we will reduce the cost of training and the pollution . Because of the difference of the characteristic between engines and motors, refit involve several aspects. Including many ways ,for example to chose a motor ,refit the driving systems ,design the circuitry and the safety of the electricity .The car in this paper is a training car in driving school ,it is requited to run at the speed of 2~3 kmph. To meet the need ,we can gain the moment and the power needed ,in this way we will get a motor .When the motor is chosen ,we have a output rate .So the driving radio is determined. To get the driving radio we have to refit the driving systems .At last we have to design the electricity line and make sure it is safe . KEY WORD:driving training ,refit jeep ,motor jeep 目录 摘要………………………………………………………………………………………………1 Abstract……………………………………………………………………………………………2 绪论…………………………………………………………………………………… ..4 引言………………………………………………………………………………….4 汽车改装前后经济性比较………………………………………………………….7 汽车改装难度分析………………………………………………………………….7 汽车改装后对环境的影响…………………………………………………………10 改装…………………………………………………………………………………… 11 2.1 计算所需驱动力矩及功率…………………………………………………………11 2