AUTOMATIC TRANSMISSIONS: “PRESSURE POINTS” OF CONTROL ALGORITHMS OF “CLUTCH-TO-CLUTCH SHIFTS” TECHNOLOGY

KRASNEVSKIY Leonid G., Corresponding Member of the NAS of Belarus, D. Sc. in Eng., Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

The previous publications of the author show that the foundations of modern theory and technology of automatic transmission control can be summarized in the form of a single multidisciplinary complex consisting of six interrelated basic technologies. The widely used “Clutch-to-Clutch Shifts” (CTC) technology is among them, which provides high quality transient processes of vehicles with modern automatic transmissions. It is provided by the use of a complex of special algorithms for controlling the transmission clutches when switching its stages. In the process of their implementation, the key points are the points at which decision-making has a significant impact on the subsequent process up to the possibility of its disorganization, called therefore “pressure points”. This is, first of all, the identification of the moment of stopping the clutch piston in the process of switching and calibration of the transmission and mechatronic control system, as well as the choice of precision electrohydraulic actuators. Based on the analysis of a large volume of patents and scientific publications, the analysis of methods is given for solving these problems used by the world’s leading manufacturers of automatic transmissions.

mobile machines, automatic transmissions, mechatronic control systems, “Clutch-to-Clutch Shifts” technology of switching stages

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