Myhalevych M. Theoretical bases of clutch control systems for the vehicles of categories N3 and M3 with mechanical transmission

Mykhalevych M.H. Theoretical bases of clutch control systems for the vehicles of categories N3 and M3 with mechanical transmission. — Qualifying scientific work, manuscript copyright. The dissertation for competition for a scientific degree of the Doctor of Engineering Science on specialty 05.22.02 — automobiles and tractors (274 — Motor transport) — Kharkiv National Automobile and Highway University, Ministry of Education and Science of Ukraine, Kharkiv, 2021. The dissertation deals with the problem of increasing the efficiency of vehicle movement, improvement of working conditions for the driver and comfort while driving by enhancement of output parameters of automated and automatic clutch control systems for vehicles of categories N3 and M3. The analysis of the current state of vehicles clutch control systems has been carried out and the research tasks have been determined. During theoretical research the mathematical description of dry friction in the part of interaction of contacting bodies in the absence of slipping has been improved. A feature of the proposed law of clutch control, based on parametric Bézier curves, is the exclusion of time from its representation, which makes possible to return to the previous mode of movement when the load changes. The methodology of formation of stable output parameters of the clutch control system taking into account internal and external factors is offered. One of the aspects of the methodology is the study of the components of the control system in a wide temperature range. In order to ensure the rational use of the car kinetic energy by the driver, a method of predicting the runway based on the functional relationship between the path in the mode of rolling or engine braking and the initial speed was developed, which is based on the balance of kinetic energy and inertia. Key words: automatic clutch control system, Bezier curve, induction sensor, vehicle launch, vehicle, coasting mode distance, vehicle clutch, influence of ambient temperature.