Variable valve control mechanism

Abstract

The present invention relates to a variable valve control mechanism, characterized in that the movement of a sliding block is controlled so as to make the variable valve control mechanism driven by an actuating mechanism, further control the opening of an engine valve for producing high lift or low lift and achieve the switching effect between high lift and low lift. The design provided by the present invention can solve the switching failure of the traditional hole-pin connecting mechanism due to the inaccurate positioning in the lift switching. In the better practical examples of the present invention, the actuating mechanism in high lift does not contact the variable valve control mechanism when the valve is in low lift, so the valve motion will not be affected even in low lift. Thereby, the present invention can make the engine operate with better combustion efficiency under an appropriate rotating speed and reduce the oil consumption.

Description

technical field [0001] The invention relates to a valve control mechanism, in particular to a variable valve control mechanism which utilizes the movement of a control slider to selectively receive the driving force of an actuating mechanism and then controls the lift opening state of the valve. Background technique [0002] In recent years, the price of oil has skyrocketed, and the fuel consumption performance of engines has been paid more attention. According to the research data, the importance of the variable valve control mechanism technology is quite high, because the technology is the basis of many technologies such as cylinder deactivation and engine downsizing. [0003] Among the variable valve mechanisms, most of the mechanisms are designed as in US Patent No. US. Pat. No. 6,223,706B1. Referring to Fig. 1, the variable valve mechanism 1 has a hollow outer jack 10, an inner jack 11 is located inside the outer jack 10 and can slide therein, a set of high and low lif...

AI Technical Summary

Problems solved by technology

In this design, when the outer jacking cylinder 10 and the inner jacking cylinder 11 are to be connected, but if the locking pin 14 is not on the same straight line as the hole, the locking pin 14 will not be able to enter the accommodation space 102 smoothly, and the head switching will fail.

[0005] In addition, when this type of design is in a low-lift state, the low-lift cam will press down on the inner jack 11 to drive the valve. At this time, the high-lift cam will still press down on the outer jack 10, although the displacement of the outer jack 10 can be controlled by the inside of the jack. However, if the design of the spring 16 in the ejector group is poor, or the high-lift cam still presses down on the outer ejector when the valve is closed, it will exert a force on the valve spring 16, which will affect the valve spring 16 in the low-lift state. Valve actuation affects

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