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체인 CVT 동력전달 요소 소음, 진동 특성에 관한 실험적 연구
류성수(Sungsoo Ryu),이선형(Sun hyeong Lee),조명수(Myung-Soo Cho),최인혁(Inhyuk Choi) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Pull type Continuous Variable Transmission(CVT) has an advantage on maintaining an internal combustion engine higher power efficiency than a push type CVT, while pulley-chain impact noise might pass through the driver seat position. To examine main cause of the chain impact noise and to reduce it, the specific driving pattern was considered via CAN bus and implemented to the transmission dynamometer. Noise and vibration of the CVT were measured in each step input torques and shift modes in the dynamometer tests.
아이들 조건에서 자동변속기 밸브바디의 압력 맥동 현상에 대한 연구
전경원(Kyungwon Jeon),류성수(Sungsoo Ryu),박현창(Hyunchang Park),조명수(Myungsoo Cho) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
This paper is an experimental study on the main factors of fluid pressure pulsation phenomena occurring automatic transmission’s valve body in idle condition. When the vehicle is stationary, the transmission reserves the necessary hydraulic pressure in the ND / NR accumulator in preparation for forward or reverse. In the process of storing the hydraulic pressure in the accumulator, the line pressure is varied. When characteristics of dynamic pressure are not considered, pressure pulsation may occur. In order to identify the main factors of the pressure pulsation, the pressure propagation characteristics were analyzed by intervals and the influence factors were experimentally verified.