Eccentric shaft control system of complete-variable air valve lift mechanism

Abstract

The invention relates to an eccentric shaft control system of a complete-variable air valve lift mechanism. An engine cylinder cover (7) is provided with a bearing seat (5); the bearing seat (5) is provided with an eccentric shaft (4); the eccentric shaft (4) is provided with an eccentric wheel (43); a worm (12) is installed on a rotor of a motor (1); a worm wheel (14) is fixedly connected to an eccentric shaft neck (44); and during the meshing process of the worm (12) and the worm wheel (14) driven by the motor (1), through the effect of an angle limiting device, the adjustment of an adjustment air valve from zero to the maximum value can be realized through the rotation changes of the eccentric shaft (4) from zero to 180 degrees. According to the invention, because the rotation changes of the eccentric shaft from zero to 180 degrees are controlled by the angle limiting device, the adjustment of the adjustment air valve from zero to the maximum value can be realized, and the accurate regulation and control, and prevention of system failure are ensured, so that the reliability of the engine is strengthened.

Description

technical field [0001] The invention relates to an eccentric shaft control system of a fully variable valve lift mechanism in an automobile internal combustion engine. Background technique [0002] The development of variable valve trains puts forward higher requirements for the control of the system. On the one hand, the variable valve system needs to be able to meet the variable requirements of valve lift, duration, and timing; on the other hand, it must ensure the control Accurate, avoiding system failure, thereby enhancing the reliability of engine work; in addition, it is necessary to reduce the weight and complexity of the system as much as possible. [0003] The structure of the eccentric shaft control mechanism in the Chinese patent application "a valve lift control mechanism capable of realizing stepless adjustment" (CN200910116666.2) is relatively complicated and the reliability is not high. Contents of the invention [0004] The present invention designs an ecc...

AI Technical Summary

Problems solved by technology

[0004] The present invention designs an eccentric shaft control system of a fully variable valve lift mechanism. The technical problem it solves is that the existing eccentric shaft control mechanism has a relatively complicated structure, low reliability and cannot minimize the eccentric shaft. Realize the adjustment of the valve lift from zero to the maximum value within the rotation range

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