Vehicle power performance is mainly affected by engine parameters, transmission ratio of main reducer, transmission gear number and transmission ratio, streamlined automobile, automobile quality, tire size and form, and driving conditions of automobile.

　　①发动机参数的影响有发动机大功率、发动机大转矩和发动机外特性曲线的形状。

　　The influence of engine parameters includes the maximum power, the maximum torque and the shape of engine external characteristic curve.

　　②主减速器传动比的影响。主减速器传动比的选择主要考虑汽车的用途及经常使用的道路条件。

　　(2) The influence of transmission ratio of main reducer. The choice of transmission ratio of main reducer mainly considers the use of automobile and the road conditions which are often used.

　　③传动系统档数的影响。无副变速器和分动器时，传动系统档数即为变速器前进档的档数。变速器档数增加时，发动机在接近大功率工况下工作的机会增加，发动机的平均功

　　(3) The influence of transmission gear number. The number of gears in the transmission system is the number of gears in the forward gear of the transmission when there are no transmission and transmission. With the increase of transmission gears, the chance of engine working near maximum power increases, and the average power of engine increases.

　　④变速器传动比的影响。有变速器的小传动比和大传动比以及变速器各档传动比的比例关系。

　　(4) The influence of transmission ratio. The relationship between the minimum transmission ratio and the maximum transmission ratio of the transmission and the proportions of the transmission ratios of each gear.

　　⑤汽车流线形的影响。汽车的空气阻力系数对汽车的动力性有影响。流线形对高速汽车的动力性、经济性影响是非常显著的，但对汽车能克服的大道路阻力影响不大。

　　_The influence of automobile streamline. The aerodynamic drag coefficient of a vehicle has an effect on its dynamic performance. Streamlinearity has a significant impact on the power and economy of high-speed vehicles, but it has little impact on the maximum road resistance that can be overcome by vehicles.

　　⑥汽车质量的影响。汽车总质量增加时，动力因数将随之下降，而道路阻力和加速阻力随之增大。因此对于额定载质量一定的汽车，在保证刚度与强度足够的前提下，应尽量减轻自身质量，以提高汽车的动力性。

　　_The influence of automobile quality. As the total mass of the vehicle increases, the power factor will decrease, while the road resistance and acceleration resistance will increase. Therefore, for a vehicle with a certain rated load quality, on the premise of ensuring sufficient stiffness and strength, it is necessary to reduce its own mass as far as possible in order to improve the power performance of the vehicle.

　　⑦轮胎尺寸与形式的影响。汽车的驱动力与滚动阻力以及附着力都受轮胎的尺寸与形式的影响，故合理选用轮胎花纹与形式对汽车的动力性有重要意义。

　　_The influence of tire size and form. The driving force, rolling resistance and adhesion of automobiles are affected by the size and form of tyres. Therefore, it is important to choose the proper pattern and form of tyres for the power performance of automobiles.

　　⑧影响汽车运行条件的主要因素有气候条件、高原山区、道路条件等。在高原地区行驶的车辆，由于海拔较高，空气稀薄，使发动机充气量与气缸内压缩终点压力降低，导致发动机功率下降。汽车行驶在坏路和无路的条件下，由于路面附着系数减小和车轮滚动阻力增加，使汽车动力性大大降低。

　　_The main factors affecting the running conditions of automobiles are climate conditions, plateau mountainous areas, road conditions and so on. Vehicles traveling in Plateau area, because of the high altitude and thin air, reduce the inflatability of the engine and the end pressure of compression in the cylinder, resulting in the decrease of engine power. Under the condition of bad road and no road, the vehicle dynamic performance is greatly reduced due to the reduction of road adhesion coefficient and the increase of wheel rolling resistance.

　　济南哪里有宝马汽车维修的等更多内容可以点击我们的官网进行咨询：http://www.lutongqixiu.com/

　　Where does Jinan have BMW repair and other more content can be clicked on our official website for consultation: http://www.lutongqixiu.com/