US 12,072,024 B2
System and method for controlling engine torque according to transmission hydraulic pressure
Nam-Hoon Kim, Gyeonggi-do (KR); Sung-Hyun Park, Gyeonggi-do (KR); Se-Hoon Son, Gyeonggi-do (KR); and John-Ha Lee, Gyeonggi-do (KR)
Assigned to Hyundai Kefico Corporation, Gyeonggi-do (KR)
Filed by Hyundai Kefico Corporation, Gyeonggi-do (KR)
Filed on Apr. 26, 2023, as Appl. No. 18/139,894.
Claims priority of application No. 10-2022-0058406 (KR), filed on May 12, 2022.
Prior Publication US 2023/0407967 A1, Dec. 21, 2023
Int. Cl. F16H 63/50 (2006.01); F16H 61/04 (2006.01)
CPC F16H 63/502 (2013.01) [F16H 61/0403 (2013.01); F16H 2306/30 (2013.01); F16H 2306/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of controlling engine torque of an engine of a vehicle according to transmission hydraulic pressure, the method comprising:
providing an engine torque converter connected to the engine and an automatic transmission of the vehicle, the engine torque converter configured to distribute engine torque to wheels of the vehicle;
confirming, in an engine torque controller, whether a turbine speed difference satisfies a condition for entering engine torque control during shifting of the automatic transmission;
calculating, by the engine torque controller, a required turbine torque for preventing a shift shock using at least one of a turbine angular acceleration, a driving resistance torque, or a coupling solenoid torque;
performing, by the engine torque controller, turbine torque factor learning using, as a stored value of turbine torque factor learning, a result obtained by applying one at least one of an accelerator pedal scope (APS), an engine torque, and a transmission fluid temperature at the beginning of actual shifting to a condition for entering the turbine torque factor learning under the condition that no flare occurs during the shifting, applying average turbine acceleration or average engine torque difference reduction to a condition for prohibiting the turbine torque factor learning, and generating and storing the result of the turbine torque factor learning in accordance with the shift time that began from the actual shifting start point;
converting, by the engine torque controller, the stored value of turbine torque factor learning into an engine torque control value by the required turbine torque; and
applying, by the engine torque controller, the engine torque control value to output of the engine.