Patent ID: 7255076

Claim:
A variable valve lift apparatus for vehicle engines, comprising: a high-speed arm, comprising: a body including a bottom plate and vertical plates, and rotatably mounted to a rocker arm shaft; cam contact parts provided on upper ends of respective vertical plates, and contacting high-speed cams; first and second cylinders provided under the corresponding cam contact parts; a side body to couple the first cylinder to a rocker arm shaft boss provided on an associated vertical plate; and an oil hole, an annular groove, and an oil passage provided in the rocker arm shaft, the rocker arm shaft boss, and the side body, respectively, and making an interior of the rocker arm shaft communicate with the first cylinder; a low-speed arm located between the vertical plates of the high-speed arm, and rotatably mounted to the rocker arm shaft, and comprising: a roller shaft having the same inner diameter as each of the first and second cylinders of the high-speed arm; a roller fitted over the roller shaft, and contacting a low-speed cam; and a valve pressing end provided in front of the roller; a compression pin provided in the first cylinder coupled to the oil passage of the high-speed arm; a center pin provided in the roller shaft of the low-speed arm; and a return spring provided in the second cylinder of the high-speed arm.