PURPOSE: An electro-hydraulic VVL(Variable Valve Lift) device is provided to reduce the impact when opening a valve through a stepped portion and a bypass channel. CONSTITUTION: An electro-hydraulic VVL device comprises a VVL housing(20), a master piston(30), a slave piston(50), and an oil control unit. The master piston is installed and slid in the VVL housing and contacts a cam(10). The slave piston is installed and slid in the VVL housing and forms an oil chamber with the master piston. The slave piston opens and closes a valve(100) according to the reciprocating motion of the master piston. The oil control unit supplies/discharges oil to/from the oil chamber.
申请公布号
KR20110063174(A)
申请公布日期
2011.06.10
申请号
KR20090120129
申请日期
2009.12.04
申请人
HYUNDAI MOTOR COMPANY;KIA MOTORS CORPORATION
发明人
CHO, HO SUNG;YANG, JIN GYU;CHO, MYUNG RAE;LEE, HONG WOOK;KANG, SEONG HYUK;PARK, TAE WON;YANG, JIN WOO;KIM, WOO TAE;CHOI, MYUNG SIK;CHOI, EUI CHUL;KANG, SUNG HAN;KIM, WON GYU