Valve timing mechanism for engine and vehicle with same

Abstract

The invention discloses a valve timing mechanism for an engine and a vehicle with the valve timing mechanism. The valve timing mechanism comprises valve mechanisms, rocker arm components, first rollers, second rollers, first cam shafts, second cam shafts, lift adjusting mechanisms and phase adjusting mechanisms. Driving molded surfaces are constructed at the bottoms of the rocker arm components, the first rollers and the second rollers are arranged on the rocker arm components in a pivotal mode, the first cam shafts are provided with first cams, the second cam shafts are provided with second cams, the first cams abut against the first rollers, the second cams abut against the second rollers, the lift adjusting mechanisms comprise driving components, adjusting arms and connecting arms, the two ends of each connecting arm are connected with each rocker arm component and one end of each adjusting arm respectively in a pivotal mode, the driving components drive the other ends of the adjusting arms to enable the adjusting arms to rotate around the adjusting axes, and the phase adjusting mechanisms are used for adjusting the relative phase between the first cam shafts and the second cam shafts. The valve timing mechanism can achieve secondary opening of valves, meanwhile can prolong the continuous time of valve opening, and is simple in structure and small in number of 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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