Valve train for engine and vehicle having same

Abstract

The invention discloses a gas distribution mechanism for an engine and a vehicle with the same. The gas distribution mechanism includes: a valve train; a rocker arm assembly with a drive profile adapted to drive the movement of the valve at the bottom; first and second rollers that are pivotally arranged on the rocker arm assembly; including a coaxial arrangement The camshafts of the inner shaft and the outer shaft have an inner shaft cam and an outer shaft cam that rotates with the corresponding shaft respectively, the outer shaft cam abuts against the first roller, and the inner shaft cam abuts against the second roller ; The support structure arranged on both sides of the rocker arm assembly; the phase adjustment mechanism; the gas distribution mechanism also includes a third roller or a limit pin, and the support structure is also configured with an arc surface or a sliding groove, and the third roller can roll Closely attached to the arc surface, the limit pin is slidably fitted in the slide groove. The valve mechanism of the present invention can realize the secondary opening of the valve, and at the same time can prolong the opening duration of the valve, has a simple and compact structure, and has little influence on the height of the engine.

Description

technical field [0001] The invention relates to the field of automobile construction, in particular to a gas distribution mechanism for an engine and a vehicle with the same. Background technique [0002] The valve mechanism of the engine is used to drive the opening and closing of the valves. The valve timing is generally determined based on the local optimization of a narrow working range of the engine. It is fixed during the working process, and the valve movement law is completely determined by the cam profile. . However, due to the single cam profile, it is impossible to adjust the valve movement law according to the actual working conditions of the engine, and it cannot adapt to different operating conditions of the engine at the same time, resulting in high fuel consumption and poor emissions. The advanced variable valve lift technology can only change the maximum lift of the valve opening, the change method is relatively simple, and the structure is complex, there a...

AI Technical Summary

Problems solved by technology

However, due to the single cam profile, it is impossible to adjust the valve movement law according to the actual working conditions of the engine, and it cannot adapt to different operating conditions of the engine at the same time, resulting in high fuel consumption and poor emissions. The advanced variable valve lift technology can only change the maximum lift of the valve opening, the change method is relatively simple, and the structure is complex, there are many parts, and the control is cumbersome

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