Hyundai Motor Company

Kia Motors Corporation

Jun Geol Song

Seung Han Lee

Sung Chan Na

Jee Wook Huh

Yong Kak Choi

Seong Ik Park

Teh Hwan Cho

Kyoung Cheol Oh

Chang Min Lee

Kwon Chae Chung

Soo Yong Lee

An engine clutch disengagement control method for a hybrid electric vehicle is disclosed to overcome a sense of discontinuous travel caused when an engine clutch is disengaged due to influence of the inaccuracy of model engine torque. The method includes: acquiring vehicle acceleration information during engine clutch disengagement control of the hybrid electric vehicle, determining whether a predetermined condition for determining inaccuracy of model engine torque required for engine clutch disengagement control is satisfied from the acquired vehicle acceleration information, when the predetermined condition is satisfied, determining a situation in which the model engine torque is inaccurate and calculating target compensation torque using the vehicle acceleration information, calculating a target slippage amount in a transmission clutch using the calculated target compensation torque, and performing transmission clutch torque control for inducing slippage in a transmission clutch based on the target slippage amount and a current transmission speed.

Engine clutch disengagement control method for hybrid electric vehicle

An apparatus and method for controlling gear shift of a hybrid vehicle prevent frequent gear shift by adjusting output of a driving motor or a gear shift time point of a transmission based on road condition or vehicle state while the hybrid vehicle is driven in a specific road condition or a specific vehicle state in a HEV mode. The apparatus includes a driving state detector that detects a road condition and a vehicle state and a controller that receives the road condition and the vehicle state from the driving state detector to differentiate and select a hybrid electric vehicle (HEV) mode into a normal mode and a compensation mode. The controller adjusts the output of a driving motor or a gear shift time point of a transmission according to different conditions from the driving state detector in the compensation mode.

Apparatus and method for controlling gear shift of hybrid vehicle

An overheat prevention method includes an rpm comparison step of comparing an engine revolution per minute (rpm) speed with a preset rpm speed by a controller when requiring an engagement of an engine clutch, a temperature comparison step of comparing a temperature of a transmission clutch with a preset temperature by the controller when it is determined that the engine rpm speed is less than the preset rpm speed at the rpm comparison step, and a serial drive mode control step of releasing the engine clutch and engaging the transmission clutch, and controlling a hybrid starter generator (HSG) to charge a battery using engine power to provide driving power to a motor by the controller when it is determined that the temperature of the transmission clutch is higher than the preset temperature at the temperature comparison step.

Overheat prevention method for transmission clutch

A shift control system and method of a hybrid vehicle are provided and controlled by dualizing a brake shift pattern based on whether an engine clutch release is possible when a hybrid vehicle brake is engaged. The system includes a hybrid controller that is configured to detect whether engine clutch release is possible, based on battery state information and input data from a operation. In addition, a shift controller is configured to execute a gear shift by a brake shift pattern based on whether the engine clutch release is possible.

Shift control apparatus and method of hybrid vehicle

Growing community of inventors

Seoul, South Korea

Jun Geol Song