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Actuating agencies, variable valve lift devices, engines and automobiles

An actuator and valve lift technology, applied in the fields of variable valve lift devices, engines, automobiles, and actuators, can solve the problems of many moving parts and complex structure, and achieve the effect of variable lift and simple structure

Active Publication Date: 2020-01-14
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is that the variable valve lift technology in the prior art has complex structure and many moving parts.

Method used

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  • Actuating agencies, variable valve lift devices, engines and automobiles
  • Actuating agencies, variable valve lift devices, engines and automobiles
  • Actuating agencies, variable valve lift devices, engines and automobiles

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Experimental program
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Embodiment Construction

[0046] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0047] refer to figure 1 , in the prior art, such as Audi’s AVS variable valve lift system, mainly by switching two sets of cams 3 and 4 with different heights on the camshaft 2 to change the lift of the valve, through the screw mounted on the camshaft 2 The groove sleeve 2a is used to realize the left and right movement of the camshaft 2, and then switch the high and low cams on the camshaft 2. For example, when the engine is under high load, the electromagnetic driver 1 moves the camshaft 2 to the right and switches to the high-angle cam 4, thereby increasing the valve lift; when the engine is under low load, the electromagnetic driver 1 moves the camshaft 2 to the right. Moving left, switch to low angle cam 3 to reduce valve lift.

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Abstract

Provided are an actuating mechanism, a variable valve lift device, an engine and an automobile. The actuating mechanism comprises a shaft and at least one drive set. Each drive set comprises a first swinging arm and a second swinging arm, wherein the first swinging arm is provided with a first valve opening section along the circumferential curved surface, and the first valve opening section extends from the basic circle of the first swinging arm; the second swinging arm is provided with a second valve opening section along the circumferential curved surface, and the second valve opening section extends from the basic circle of the second swinging arm; and when the first valve opening section and the second valve opening section face a roller, the first valve opening section is lower thanthe second valve opening section in the direction from the roller to the drive set. The variable valve lift device is simple in structure, the rollers make contact with the first valve opening sections and the second valve opening sections separately through axial movement of the drive sets, thus a valve can be switched between a high lift and a low lift, and the variable lift of the valve is achieved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an actuator, a variable valve lift device, an engine and an automobile. Background technique [0002] The engine gas distribution mechanism (internal combustion engine gas distribution mechanism) is to open and close the intake and exhaust valves of each cylinder regularly according to the requirements of the working cycle and ignition sequence in each cylinder of the engine, so that the fresh combustible mixture (gasoline engine) Or air (diesel engine) can enter the cylinder in time, and exhaust gas can be discharged from the cylinder in time. During the compression and power strokes, the valve is closed to ensure the sealing of the combustion chamber. [0003] The valves that control the intake charge exchange process of the engine have three main characteristic parameters: valve opening phase, valve opening duration angle (the crankshaft angle at which the valve remains o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L13/00
CPCF01L13/0015
Inventor 朱兰张小虎陈明徐政
Owner SAIC MOTOR