Electrically-controlled hydraulic fully-variable valve driving mechanism

Abstract

The invention provides an electrically-controlled hydraulic fully-variable valve driving mechanism. The electrically-controlled hydraulic fully-variable valve driving mechanism comprises a low-pressure valve element, a valve body, a high-pressure valve element, a cylinder sleeve and a first piston, wherein the low-pressure valve element is arranged on one side in the valve body in a sliding mode; the high-pressure valve element is arranged on the other side in the valve body in a sliding mode; a low-pressure oil cavity capable of communicating with a low-pressure oil inlet is formed in the valve body, and one end of the high-pressure valve element extends into the low-pressure oil cavity; a pressure oil outlet is formed in the bottom of the valve body; a low-pressure oil channel connected with the low-pressure oil inlet is arranged in the valve body; the other end of the low-pressure oil channel can communicate with a pressure oil outlet; the cylinder sleeve is arranged at the bottom of the valve body, and the first piston penetrates through the cylinder sleeve; and one end of the first piston can extend into the pressure oil outlet. The structure is compact, the valve is driven to be opened and closed in an electrically-controlled hydraulic fully-variable mode, the technical power consumption is reduced, the effects of energy recovery and action buffering are achieved, and the safety coefficient is high.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an electronically controlled hydraulic fully variable valve driving mechanism. Background technique [0002] At present, the variable phase and variable valve lift mechanism on the vehicle engine is mainly the cam valve lift mechanism, which changes the valve timing and valve lift through the transformation of the cam. This structure can only realize part of the valve with fixed size. Lift adjustment, and the opening and closing phase of the valve cannot be adjusted independently of each other, only early opening and early closing or late opening and late closing can be realized at the same time, therefore, it is impossible to reasonably adjust the valve timing and valve lift required by the engine under different working conditions adjust; [0003] In the working process of the existing hydraulic valve system, some systems can realize variable adjustment of valve phase and valv...

AI Technical Summary

Problems solved by technology

[0002] At present, the variable phase and variable valve lift mechanism on the vehicle engine is mainly the cam valve lift mechanism, which changes the valve timing and valve lift through the transformation of the cam. This structure can only realize part of the valve with fixed size. Lift adjustment, and the opening and closing phase of the valve cannot be adjusted independently of each other, only early opening and early closing or late opening and late closing can be realized at the same time, therefore, it is impossible to reasonably adjust the valve timing and valve lift required by the engine under different working conditions adjust;

[0003] During the working process of the existing hydraulic valve system, some systems can realize the variable adjustment of valve phase and valve lift, but due to the complex structure of the system and large technical power consumption, it is easy to affect the fuel consumption of the engine

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