Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Seoul National University

Snu Rdb Foundation

Won Sik Lim

Jae Ho Lee

Ji Hoon Kim

Jae Hyeon Park

Seok Min Jeong

Hee Yun Lee

Suk-Won Cha

Seongwook Moon

Daero Park

Howon Seo

Jung Un An

Kyo Bum Lee

Nam Woong Kim

A method for calculating a degradation degree of a damper clutch of an automatic transmission of a vehicle includes: filtering, by a controller, a vibration signal of the vehicle according to driving of the vehicle in order to remove a vibration signal of the vehicle corresponding to a natural frequency of an engine of the vehicle from the vibration signal of the vehicle according to the driving of the vehicle; converting, by the controller, the filtered vibration signal into a signal including a sinusoidal wave having a natural frequency of the automatic transmission based on a gear stage of the automatic transmission of the vehicle by using a frequency analysis method; and calculating, by the controller, a degradation degree of the damper clutch included in a torque converter of the automatic transmission based on a magnitude of the sinusoidal wave having the natural frequency of the automatic transmission.

Method and apparatus for calculating degradation degree of a damper clutch of an automatic transmission of a vehicle

A hydraulic pressure instruction-learning apparatus of a hybrid vehicle includes a power source including an engine and a motor. The engine clutch is disposed between the engine and the motor. The vehicle controller is configured to output a hydraulic pressure instruction to control engagement/disengagement of the engine clutch. The vehicle controller compares output performance of the engine clutch with predetermined dynamic target performance in a launch control, extracts a performance error function if a difference therebetween exceeds a predetermined allowable error range, and corrects the output performance of the engine clutch, such that the output performance falls within the predetermined allowable error range and is stored as a learned value.

Hydraulic pressure instruction-learning apparatus for hybrid vehicle and method using the same

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Seoul, South Korea

Won Sik Lim