Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Seoul National University

Snu Rdb Foundation

Won Sik Lim

Jae Ho Lee

Ji Hoon Kim

Seok Min Jeong

Jae Hyeon Park

Suk-Won Cha

Seongwook Moon

Hee Yun Lee

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