Rocker arm mechanism

Abstract

The invention relates to a rocker arm mechanism. The rocker arm mechanism comprises inner rocker arms, an outer rocker arm and a cam shaft, wherein the inner rocker arms and the outer rocker arm are rotationally connected through a connecting shaft, and the cam shaft is located at the upper portions of the inner rocker arms and the outer rocker arm; the outer rocker arm is in a T shape, and a basecircle needle bearing is rotationally connected into a longitudinal arm body of the outer rocker arm; the inner rocker arms are rectangular, are located on the two outer sides on the left and right of the longitudinal arm body of the outer rocker arm and include the low-lift inner rocker arm and the high-lift inner rocker arm, a low-lift needle bearing is rotationally connected into the low-liftinner rocker arm, and a high-lift needle bearing is rotationally connected into the high-lift inner rocker arm; and a cam part on a cam shaft comprises a base circle cam located at the middle portionand connected with the base circle needle bearing and lift cams located on the two sides and connected with the low-lift needle bearing and the high-lift needle bearing at the same time, and only onerocker arm mechanism is needed for achieving the cylinder stopping-high lift-low lift working mode.

Description

technical field [0001] The present invention relates to a rocker mechanism. Background technique [0002] With the increasing popularization of the concept of energy saving and environmental protection, more and more attention has been paid to energy saving and emission reduction of automobiles, and engine variable valve lift technology is an effective means to realize energy saving and emission reduction of automobiles. In order to cope with climbing and acceleration conditions, the power of the engine is surplus, so the power of the engine is greatly wasted when the car is running at low speed, and the variable valve lift technology of the engine can change the lift of the valve under different working conditions , so as to change the engine power, not only can make full use of the engine power, but also can reduce fuel consumption, reduce exhaust emissions, and achieve the effect of energy saving and environmental protection. [0003] At present, most variable valve lift...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the variable valve lift mechanisms are cam shift, multi-cam, internal and external rocker arm mechanisms, and most of the internal and external rocker arm mechanisms can only realize cylinder deactivation or high and low lift changes. The mechanism is complex and the cost is high

[0004] In the prior art, only two working modes of cylinder deactivation-normal or high lift-low lift can be realized, and cylinder deactivation-high lift-low lift working mode cannot be realized at the same time; the lock pin and the lock pin spring are installed in the inner rocker arm , the inner rocker arm and the outer rocker arm have relative movement, oil circuit design is difficult, and the sealing is poor; and the two working modes require two cams of different sizes, and the process is complicated

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