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 a plurality of valve mechanisms, a plurality of rocker arm components, a plurality of sets of first rollers, a plurality of sets of second rollers, first cam shafts, second cam shafts and a phase adjusting mechanism. 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 comprise inner shafts and outer shafts, the inner shafts and the outer shafts are coaxially arranged, a plurality of inner shaft cams are arranged on the inner shafts, a plurality of outer shaft cams are arranged on the outer shafts, the inner shaft cams abut against some first rollers respectively, the outer shaft cams abut against the other first rollers respectively, the second cam shafts are provided with a plurality of driving cams, the driving cams abut against the second rollers, and the phase adjusting mechanism is used for adjusting the relative phase between the outer shafts and the second cam shafts, and the relative phase between the outer shafts and the inner 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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