Rocker arm assembly with variable valve lift

Abstract

The invention relates to a rocker arm assembly with a variable valve lift. The rocker arm assembly comprises a rocker arm, a swing arm, a driving piece and a lift adjusting assembly, wherein one end of the rocker arm is connected with a rocker arm roller and in transmission fit with a cam structure; one end of the swing arm is rotationally connected with the rocker arm, the rotating axial direction of the swing arm is parallel to the rotating axial direction of the rocker arm, and the other end of the swing arm is rotationally connected with a valve bridge assembly; the driving piece is movably arranged on the rocker arm and can be close to or far away from the swing arm so as to be used for abutting against and driving the swing arm to move when the rocker arm rotates; and the lift adjusting assembly is arranged on the rocker arm and can be used for limiting the driving piece at at least two positions. The rocker arm assembly is prevented from being limited by different types of valve bridge assemblies, due to the fact that the transmission mode is a lever type transmission mode, the valve bridge assembly can achieve large lift change in a limited space, adaptability is higher, more space is saved, response is faster during operation, and the lift of the engine valve bridge assembly can be driven and adjusted according to user requirements.

Description

technical field [0001] The present application relates to the field of valve trains for vehicle engines, in particular to a rocker arm assembly with variable valve lift. Background technique [0002] In the engine, the rocker arm rollers in contact with the cam structure are generally driven to drive the rocker arm to move, and finally drive the valve bridge connected to the rocker arm to lift. With the continuous development of engines, variable valve lift technology has become an important technology in the engine field. [0003] At this stage, the variable valve lift movement mechanism can generally be realized by means of variable cam or variable valve bridge. The variable cam method can be realized by changing the cam position or switching the cam and switching the rocker roller, which often requires complex conversion mechanisms and servo motors to control; the variable height valve bridge is to use the height change of the valve bridge to realize the valve lift chan...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a rocker arm assembly with variable valve lift to solve the problems of complex structures, limited space, and difficult installation in the various ways of realizing variable valve lift in the related art

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