Stepless valve rocker mechanism with variable lift and corresponding valve device

Abstract

The invention discloses a stepless valve rocker mechanism with a variable lift and a corresponding valve device. A rocker mechanism is used for being in linkage matching with a valve rod of the valve device to control the size of a valve channel of the valve device and comprises a crank connecting rod component, a crankshaft position regulation component, a valve rocker and a rocker drive component; the crank connecting rod component is composed of a crank, a crankshaft, a connecting rod and a connecting rod reset spring; the crank is an eccentric wheel; an eccentric hole of the crank is connected to the crankshaft; the position of the crankshaft is in stepless regulation by the crankshaft position regulation component; the connecting rod is an eccentric sleeve and sleeves the outer part of the eccentric wheel; one end of the connecting rod reset spring is connected with the connecting rod; the other end of the connecting rod reset spring is connected to a fixed point; the valve rocker is a lever with an eccentric part of the connecting rod as the middle fulcrum; the left end of the valve rocker is hinged to the upper end of the valve rod; and the right end of the valve rocker is in driving matching with the rocker drive component. According to the stepless valve rocker mechanism, under the conditions that the lift of an overhead cam and the phase relationship between the opportunity of opening and closing the valve and a piston crank are invariable, the lift of the valve can be regulated in a stepless manner.

Description

technical field [0001] The invention relates to a valve timing mechanism of a piston type engine, in particular to an infinitely variable lift valve rocker mechanism and a corresponding valve device. Background technique [0002] The valve timing mechanism of the engine is responsible for providing the fresh air necessary for the combustion of gasoline to the cylinder and discharging the exhaust gas after combustion. This set of actions can be regarded as the process of inhalation and exhalation of the human body. In terms of working principle, the main function of the valve timing mechanism is to open and close the intake and exhaust valves of each cylinder according to a certain time limit, so as to realize the whole process of engine cylinder ventilation and replenishment. We can compare the valve of the engine to a door. The size and duration of the door opening determine the flow of people in and out. The larger the opening angle of the door, the longer the opening tim...

AI Technical Summary

Problems solved by technology

[0007] The defect of Honda's i-VTEC technology is that it cannot be adjusted continuously, it is a two-stage variable valve lift system

[0010] The defect of BMW's Valvetronic technology is that it is a continuously adjustable variable valve lift system, but the added mechanism takes up a lot of space

[0013] Nissan's VVEL is a continuously adjustable variable valve lift system, but the added mechanism takes up a lot of space, and the friction pairs consume more power

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