Valve train for engine and vehicle having same

Abstract

The invention discloses a valve timing mechanism for an engine and a vehicle with the same. The valve timing mechanism comprises a valve mechanism, a rocker component, a first, a second and a third roller, a first cam shaft, a second cam shaft, a press block and a phase regulating mechanism, wherein a drive molded surface which is used for driving the valve mechanism is formed at the bottom of the rocker component; the first, second and third rollers are pivotally mounted on the rocker component, and the first and third rollers are arrayed coaxially; the first cam shaft comprises a first cam, the second cam shaft comprises a second cam, and the first cam is propped against the first roller while the second cam is propped against the second roller; the press block is static relatively to the engine body and is formed with a circular arc camber, and the third roller is clung to the circular arm camber; the phase regulating mechanism is used for regulating the relative phases of the first cam shaft and the second cam shaft. The valve timing mechanism is capable of realizing the secondary open of the valve, prolonging the valve opening duration, realizing the asynchronous work of two valves at the same side of the same cylinder, is capable of changing the vortex and tumble in the combustion chamber, and is capable of improving the combustion.

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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