METHOD FOR DETERMINING ENERGY LOSSES IN THE TRANSMISSION OF VEHICLES

Autor: I. Shasha
Rok vydání: 2020
Předmět:
Zdroj: The collection of scientific works of the National Academy of the National Guard of Ukraine; Vol. 2 No. 36 (2020)
Сборник научных трудов Национальной академии Национальной гвардии Украины; Том 2 № 36 (2020)
Збірник наукових праць Національної академії Національної гвардії України; Том 2 № 36 (2020)
ISSN: 2409-7470
DOI: 10.33405/2409-7470/2020/2/36/223551
Popis: Generally the transmission can be considered as a mechanical system formed by a set of rigid links, the position and speed of which are determined by the problem of the law of motion of the engine crankshaft. The transmission of the car consists of a large number of flywheels which are interconnected by shafts, clutches and other elastic elements with different angular stiffness. These assembly units form a rather complex torsional oscillatory system with scattered parameters. Loads acting on the transmission of the car are due to environmental influences (macro- and micro-profile of the bearing surface, physical and mechanical properties of the soil, etc.) and fluctuations of the car itself, and are random.To determine the actual loads in its elements and the degree of non-uniformity of their motion, as well as finding the laws of this motion, it is necessary to take into account their elasticity and the impact of these processes on fuel consumption.The method of determining losses in the transmission of the car on the basis of the energy approach taking into account the operating conditions of armored vehicles of the NGU is proposed. The method should be based on a mathematical model of fuel consumption as the main source of energy, which takes into account the variety of operating conditions and follows from the theory of the car. Mechanical losses in the engine can be expressed through the magnitude of the piston stroke and crankshaft speed. The average effective pressure is determined by the force lost in the transmission and the force applied to the wheels of the car. The total moment of resistance of transmission given to driving wheels is presented in the form of two components: the moment caused by friction losses in knots transferring loadings (gearboxes, a transfer case, reducers of leading axles, cardan transfers), and the moment taking into account expenses energy for oil spraying in units (hydraulic losses). The total transmission losses consist of two main components: idling losses and torque transmission losses. Losses in transmission separately on units are defined by means of the special stands equipped with braking and loading devices. An important advantage of the method is the ability to obtain the equation of engine power balance and determine the efficiency of the transmission as a system with distributed parameters. Further research should be aimed at improving the mathematical model of fuel consumption, taking into account the calculated values of the transmission efficiency depending on the operating conditions of armored vehicles of the NGU.
Пропонується метод визначення втрат у трансмісії автомобілів на основі енергетичного підходу з урахуванням умов експлуатації автобронетанкової техніки НГУ. Основою методу є математична модель витрати пального як основного джерела енергії, що враховує різноманіття умов експлуатації і випливає з теорії автомобіля. Важливою перевагою методу є можливість отримання рівняння балансу потужності двигуна та визначення коефіцієнта корисної дії трансмісії як системи з розподіленими параметрами.
Databáze: OpenAIRE
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