A mechanical adjustment device of a hydraulically driven fully variable valve

Abstract

A mechanical adjustment device for a hydraulically driven fully variable valve belongs to the technical field of engines. The two plungers of the two-valve opening and closing adjustment mechanism of the present invention are respectively placed in the two guide rails of the base; the tops of the two plungers respectively contact the two cams; During the air stroke: the spiral groove Ⅰ of the plunger Ⅰ is connected with the oil passage Ⅰ and oil passage Ⅱ of the base; the spiral groove Ⅱ of the plunger Ⅱ is connected with the oil passage Ⅱ and oil passage Ⅳ of the base; during the exhaust stroke: the plunger Ⅱ The spiral groove III of the base is connected with the oil passage III and the oil passage V of the base; the oil inlet hole of the hydraulic piston valve group, the oil drain hole of the hydraulic piston valve group, and the oil pipe II of the hydraulic oil supply adjustment mechanism are respectively connected with the oil passages IV and V of the base. The oil passage V is connected with the oil passage I; the invention can realize continuous variable valve lift and valve phase, can maintain the maximum lift of the valve within a certain period of time, can realize no-throttle load control of gasoline engines, reduce pumping loss, and improve Inflatable efficiency and the realization of Miller cycle, to achieve the effect of energy saving and emission reduction, simple structure, easy to control.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a mechanically regulated fully variable valve mechanism of a hydraulically driven internal combustion engine. Background technique [0002] Due to the fixed structure of the traditional engine's valve mechanism, the valve timing cannot be changed during the operation of the engine. Usually, it can only ensure the performance of the internal combustion engine in a certain working condition, and it cannot take into account the requirements of various working conditions at the same time. It is difficult To achieve the real optimal valve timing. These fixed valve operating parameters are just a compromise of various comprehensive contradictions of internal combustion engine operation requirements for valve work under different operating conditions. Therefore, in order to meet the different valve timing requirements under different working conditions, improve the economy ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of high energy consumption and high-speed response, durability, and reliability of the existing hydraulically driven variable valve mechanism solenoid valve, which cannot meet the needs and are expensive, and provide a simple and reliable structure that can flexibly control the valve. Hydraulic fully variable valve mechanical adjustment device for lift and valve timing

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