At present, most of the cars produced and sold on the market are traditional fuel vehicles. Fuel cars bring many conveniences to people’s lives, but at the same time, they also cause serious pollution to people’s living environment and the depletion of oil resources. In order to alleviate the environmental pressure and energy crisis, the “863” plan of the Ministry of Science and Technology has listed new energy vehicles as a key development project.
As a unique new driving mode of electric vehicle, the wheel-side drive system has an important impact on the transmission efficiency of the whole vehicle. The wheel drive system omits the main reducer, differential and universal joint. Compared with the traditional drive system, it has the advantages of high transmission efficiency and simple structure. It is a new trend in the development of automobile transmission system. The decelerated wheel drive system is composed of high-speed motor, gear reducer and wheel. Transmission efficiency is a factor that cannot be ignored in the design. The efficiency analysis of the wheel drive system is mainly aimed at the efficiency analysis of its gearbox. However, there are few studies on the efficiency formula of the gearbox of the wheel drive system at home and abroad.
The research takes the special gearbox of a wheel drive system as the research object. On the basis of summarizing the previous research results, the calculation formula of the total efficiency of the gearbox is proposed, and the influence of various parameters on the efficiency of the gearbox is analyzed with Matlab software. The analysis results can provide a theoretical basis for the optimization design of the gearbox.
This paper studies the efficiency of a special gearbox for the wheel drive system of electric vehicles, and establishes the total efficiency model of the gearbox. The efficiency curve obtained from the study shows that the main influencing parameter of the total efficiency of the gearbox of the system is the number of driving gear teeth. Normal modulus and kinematic viscosity. Compared with the gear box of the traditional drive system, the gear working load and speed of the gear box of the wheel drive system are relatively high, so the oil mixing loss related to the gear speed is also relatively high. This conclusion can provide a theoretical basis for further study of the transmission efficiency of the wheel drive system.