VARIABLE VALVE LIFT SYSTEM

摘要

A variable valve lift system may include a roller finger follower having an end connected with a valve and a roller mounted thereto. A hydraulic lash adjuster supports another end of the roller finger follower and has operating modes which are changed to a high lift mode or a low lift mode according to supplied hydraulic pressure to change a height of the hydraulic lash adjuster. A hydraulic pressure supplying portion supplies the hydraulic pressure to the hydraulic lash adjuster. A cam is mounted to a camshaft and contacts the roller of the roller finger follower. The cam has a first ramp and a second ramp formed thereon.

主权项

1. A variable valve lift system comprising:
a roller finger follower having an end connected with a valve and a roller mounted thereto; a hydraulic lash adjuster supporting another end of the roller finger follower and of which operating modes are changed to a high lift mode or a low lift mode according to a supplied hydraulic pressure to change a height of the hydraulic lash adjuster; a hydraulic pressure supplying portion supplying the hydraulic pressure to the hydraulic lash adjuster; a camshaft; and a cam mounted to the camshaft and contacting the roller of the roller finger follower and having a first ramp and a second ramp are formed thereto.