Continuously variable valve lift actuator of engine

摘要

Disclosed is a continuously variable valve lift actuator of an engine. The continuously variable valve lift actuator of an engine changes rotating angles of a rocker arm and a lift arm having a four-bar link structure to control an intake amount of air of an intake valve based on a running state of a vehicle, and adjusts a location and a length of a link bar by taking into consideration a rotating direction of a cam shaft and interference according to layout of the engine to advance an open time of a valve. The continuously variable valve lift actuator of an engine can reduce pumping loss by controlling an intake amount of air by changing an elevating distance of a valve according to a running state of a vehicle, and the fuel efficiency and the efficiency of the engine can be improved by advancing the open time of the valve.

主权项

1. A continuously variable valve lift actuator of an engine, comprising:
a rocker arm; a lift arm having a four-bar link structure to control an intake amount of air of an intake valve based on a running state of a vehicle; a link bar; a cam coupled to a cam shaft; and a pair of eccentric cams coupled to a control shaft, wherein the valve lift actuator is configured to change rotating angles of the rocker arm and the lift arm, and adjust a location and a length of the link bar by taking into consideration a rotating direction of the cam shaft and interference according to a layout of the engine to advance an open time of the intake valve, wherein the rocker arm is rotated within a preset angle range according to a rotational motion of the pair of eccentric cams coupled to the control shaft and a rotation motion of the cam coupled to the cam shaft, and the lift arm having one side coupled to the control shaft is rotated within the preset angle range, wherein a pair of flanges and a pair of coupling flanges spaced apart from each flange by a predetermined angle are disposed at both ends of the rocker arm in a direction perpendicular to a direction of a central axis of the rocker arm, respectively, and wherein one of the coupling flanges and the lift arm are rotatably connected to each other by one of lift arm links.