Patent ID: 11872990
Assignee: HYUNDAI KEFICO CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A method of controlling clutch friction elements of an automatic transmission, the method comprising:
(a) retrieving information about shift clutches from a data storage unit and acquiring information required to predict a temperature of a friction element for each shift clutch;
(b) deriving a predicted temperature value of a friction element for each shift clutch by using the information about the shift clutches and the information required to predict the temperature of the friction element;
(c) predicting whether or not overheating occurs for each shift clutch by comparing the derived predicted temperature value of the friction element for each shift clutch with an allowable temperature set for each shift clutch;
(d) determining a target shift stage while avoiding an overheating clutch with the predicted temperature value exceeding the allowable temperature, through switching to an avoidance shift mode;
(e) determining whether to take additional protective measures by comparing the predicted temperature value of the friction element with a reference temperature obtained by adding a specific value to a current oil temperature in a state in which the avoidance shift mode is switched; and
(f) determining a final target hydraulic pressure for the target shift stage.