Estimation of specific engine power when designing motor vehicles

Abstract

The growth of the dynamic properties of motor vehicles is an objective and continuous process. The power reserve required to create the required acceleration must be incorporated into the design when designing the car. For intensive acceleration of a vehicle from the minimum speed or from a standstill, as well as for overtaking vehicles in front at a reduced speed, it is very important for an overtaking vehicle to increase its speed in the shortest possible time in order to bypass this vehicle on the shortest path. It should also be noted that overtaking should be ensured with a minimum increase in engine power, since the engine power reserve, laid down during design, is limited by factors such as production costs, transportation costs, fuel reserves, etc.

The correct choice of the values ​​of the dynamic properties helps to increase the competitiveness of the vehicle in the world market. It should be noted that the manufacturer who is able to predict the development of the society's demand for one or another indicator of dynamic properties has a high chance of success. Therefore, creating a new vehicle, designers must take into account the operational, consumer and safety properties will be in demand by society.

It is necessary to have a mathematical apparatus that allows, at the design stage, to carry out a rational choice of the specific engine power according to the condition of ensuring the required dynamic characteristics of vehicles and from the time of the start of product design, and its competitiveness in the market.

The obtained dependencies make it possible to carry out at the design stage a rational choice of engine power according to the condition of ensuring the required dynamic characteristics of the vehicle. To realize the potential capabilities of vehicles, it is necessary to install engines, the power of which significantly exceeds the actually used ones. Implementation of the proposed recommendations will ensure a high technical level and competitiveness of promising vehicles in the world market. The results obtained can be recommended to specialists for use in the design, production, certification and operation of vehicles.