Comparative Analysis of the Influence of Road Drive Mode Speed on Fuel Consumption for Passenger Cars and Trucks

Fuel efficiency is one of the important indicators that evaluate the operational properties of a car. There are different approaches to determining fuel consumption under operating conditions, but mathematical modeling is preferred. It was established that fuel consumption directly depends on the speed of movement. The speed of movement is influenced by the technical parameters of the car, the speed limit according to the Traffic Rules, the complexity of road and transport operating conditions, the professionalism and driving style of the driver, etc. The paper examines the movement of a car on road sections where it accelerates, moves at the maximum permitted speed and stops, and the average technical speed will depend on the distance of such a road section. A model was created and simulated simulations were carried out for cars and trucks with a maximum speed limit to the permitted one in urban and non-urban conditions. In each experiment, acceleration and deceleration were varied within the prescribed limits for each type of car. The results of the most likely change in the average technical speed of the car from the length of the road section, where the car successively accelerates, moves at a constant speed and slows down to a stop, are obtained. For example, on a 100 m road section, the average technical speed of a car will be 30 km/h, and a truck - 20 km/h. Graphs of changes in the speed of cars and trucks depending on the length of the road section within and beyond the city limits are given. The average technical speed increases significantly with the increase in the length of the road section up to 1 km within the city limits and up to 2 km outside the city limits. The calculation model for determining the fuel consumption of Prof. was used in the work. Govorushchenko M.Ya. The basic rate of fuel consumption was calculated for two gasoline cars and a diesel truck. As a result of the joint use of the fuel consumption calculation model and the simulation model to determine the average technical speed from the distance of the road section on which the "acceleration-stop" cycle is carried out, the results of changes in the fuel efficiency of cars in different conditions were obtained. Graphs have been constructed that relate fuel consumption and the distance of the road section. Conclusions are formulated and ways of further research aimed at improving the methodology of fuel consumption rationing in our country are indicated.