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

Claim 2:
3. The method according to claim 1, wherein in step (b), the predicted temperature value of the friction element for each shift clutch is derived by:
determining a rotation speed and relative speed of a clutch hub and a clutch drum for each shift clutch corresponding to a current turbine rotation speed from a clutch speed map set by a relationship between a rotation speed of a turbine and the clutch hub and the clutch drum for each shift clutch;
determining a current rotation speed of an oil pump or the turbine rotation speed and an oil temperature, and an oil supply flow rate for each shift clutch corresponding to a current shift stage using an oil flow rate map;
determining an estimated transmission torque for each shift clutch using a clutch torque map, which uses a piston acting pressure derived from a target hydraulic pressure for each shift clutch and a rotational inertia of the friction element as factors, and deriving a heating value of the friction element for each shift clutch using a heating value map set by a relationship between the estimated transmission torque for each shift clutch and the relative speed between the clutch hub and the clutch drum; and
finally determining the predicted temperature value of the friction element for each shift clutch corresponding to the oil supply flow rate for each shift clutch and the heating value of the friction element for each shift clutch using a friction element temperature map set by a relationship between the heating value of the friction element for each shift clutch and the oil supply flow rate for each shift clutch.