Valve train for engine and vehicle having the 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 and a second cam shaft, a lift adjusting mechanism and a phase adjusting mechanism, wherein a drive profile 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 lift adjusting mechanism comprises a drive component and a press block, the bottom of the press block is formed into a lift profile which is clung to the third roller in fit manner, and the drive component drives the press block to rotate; the phase adjusting mechanism is used for adjusting the relative phases of the first cam shaft and the second cam shaft. The valve timing mechanism for the engine is capable of realizing the secondary open of the valve and prolonging the valve opening duration and has advantages of simple structure and less parts.

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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