UkrainianProfessional Education

Abstract

The driving cycle is a set of regulated modes of movement of motor vehicles. The standardized driving cycle is determined by an average statistical analysis of the nature of the car's movement in specific operating conditions. Driving cycles are created to evaluate the efficiency of the car in specific operating conditions. Parameters and control modes of car systems are chosen according to the consequences of the driving cycle. Cycle phase indicators, i.e. time, maximum speed, average speed, maximum acceleration/deceleration and average acceleration/deceleration are different in different cycles. The mode of movement is determined mainly by the speed and its change according to the elements of the driving cycle: acceleration, steady motion, deceleration, braking, stopping, recovery of motion. Determining the energy, economic and environmental indicators of the car in the modes of the driving cycle is possible with the help of a mathematical model that describes these modes. It is known that the driving modes of the car in the urban cycle have an unstable character. During the change of the car's operating modes, there is a constant change in fuel consumption and emissions of harmful substances. Most emissions of harmful substances enter the environment during engine warm-up, therefore it is important to reduce the engine warm-up time and speed up the catalytic converter warm-up. The article is devoted to the refinement of the mathematical model of the car's movement in the driving cycle, taking into account the heating of the catalytic converter

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