Valve stroke control compression bar

Abstract

The invention provides a valve stroke control compression bar. The valve stroke control compression bar comprises a first rocker arm, a second rocker arm, an idler wheel component, a lock pin and a spring, wherein the first rocker arm and the second rocker arm are two relatively independent rocker arms which are connected in a pivoted mode through a pivoting restoration mechanism, the idler wheel component is connected with the second rocker arm, the lock pin and the spring are installed in the second rocker arm, a lock port for locking the lock pin is formed in the first rocker arm, and a first rocker arm restoration limiting mechanism is arranged on the second rocker arm. According to the valve stroke control compression bar, switching between the locking state and the unlocking state is achieved through the cooperation of the two relatively independent rocker arms which are connected in the pivoted mode and the idler wheel component in a purely mechanical way. When the compression bar works, a cam shaft is in sliding contact with the first rocker arm and in rolling contact with the second rocker arm through the idler wheel component, and in this way, the working reliability of the rocker arms is improved greatly and the service life of the compression bar is prolonged greatly. The compression bar has the remarkable advantages of being simple in structure, high in reliability and the like.

Description

technical field [0001] The invention relates to the technical field of engine variable valve pressure rods, in particular to a valve lift control pressure rod matched with a camshaft whose outer cam blades have high lift and middle cam blades have low lift. Background technique [0002] The variable valve lift system has been widely used in new automobile engines. It enables the engine to obtain a valve lift that meets the demand in both high-speed and low-speed areas, thereby increasing the high-speed power of the engine and reducing fuel consumption at low speeds. fuel economy. [0003] The engine variable valve pressure rod is an important part of the above variable valve lift system. It switches the two states of the variable valve pressure rod according to the control signal sent by the engine control system to achieve the purpose of controlling the valve lift. The structure of the existing variable valve pressure lever of the engine is complex, and the switch between ...

AI Technical Summary

Problems solved by technology

The structure of the existing variable valve pressure lever of the engine is complex, and the switch between the locked state and the unlocked state cannot well meet the high valve lift and low valve lift required by the engine in the high speed area and the low speed area, especially in the During the most commonly used low-lift movement, the reliability of the rocker arm is insufficient, resulting in a reduction in the service life of the pressure rod when the engine is at low lift for a long time

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