Electro-hydraulic fully variable valve drive mechanism

Abstract

The invention provides an electronically controlled hydraulic fully variable valve drive mechanism, which includes a low-pressure valve core, a valve body, a high-pressure valve core, a cylinder liner and a first piston; the low-pressure valve core is slidably arranged on one side of the valve body; the high-pressure valve core The valve core is slidingly arranged on the other side of the valve body; the valve body is provided with a low-pressure oil chamber that can communicate with the low-pressure oil inlet, and one end of the high-pressure valve core extends into the low-pressure oil chamber; the bottom of the valve body is provided with a pressure oil outlet The valve body is provided with a low-pressure oil channel connected to the low-pressure oil inlet; the other end of the low-pressure oil channel can be connected to the pressure oil outlet; the cylinder liner is arranged at the bottom of the valve body, and the first piston penetrates the cylinder liner; One end of the first piston can extend into the pressure oil outlet. The invention has a compact structure, adopts an electronically controlled hydraulic mode to drive the valve for fully variable opening and closing, reduces technical power consumption, achieves the effects of energy recovery and action buffering, and has a high safety factor.

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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