Driving device for variable valve lift of automobile engine

Abstract

The invention belongs to the technical field of automobile engines, and specifically relates to a driving device for variable valve lift of an automobile engine, which includes a valve arranged on a cylinder head, one end of a rocker arm of the valve connected to a rod end of the valve, and the other end of the rocker arm of the valve One end is also connected with the valve lifter, and the device also includes an intermediate rocker arm. The lower end of the intermediate rocker arm forms a pressure fit with the middle section of the valve rocker arm, and the upper end of the intermediate rocker arm abuts against the curved surface of the guide rail of the upper support. The two sides are against the eccentric shaft and the camshaft respectively, and the middle rocker arm is also connected with the spring. The spring provides elastic force to drive the middle rocker arm against the camshaft. Arranged in parallel, the eccentric shaft includes a rotating shaft and an eccentric wheel set on the rotating shaft. A turbine disk is arranged at the middle of the rotating shaft of the eccentric shaft. The turbine disk and the worm cooperate to form a worm gear and worm mechanism. The arm and the support of four points can realize the adjustment of valve opening and closing and lift. The device structure is simple and the accuracy of adjusting the valve lift is high.

Description

technical field [0001] The invention belongs to the technical field of automobile engines, in particular to a driving device for variable valve lift of automobile engines. Background technique [0002] At present, most piston-type automobile engines use the throttling method of the throttle valve to control the air charge entering the engine cylinder, and the air charge entering the intake manifold is controlled by the throttling effect of the throttle valve, thereby controlling the air charge entering the intake manifold. The air charge of the engine's valves, which in turn control the air charge into the engine cylinders. However, the mechanical parameters of this kind of throttle valve have been set. When the engine operating conditions are complex, the air charge demand in the cylinder has a large difference with the different engine operating conditions. Taking a gasoline engine as an example, when the load is small, the engine only needs a small air charge, and in ord...

AI Technical Summary

Problems solved by technology

The core part of the above-mentioned control mechanism achieves the purpose of adjusting the attitude of the combined rocker arm through the swing of the connecting shaft. The structure is complex, and the installation of the connecting shaft in the engine is relatively difficult.

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