Engine valve lift variable device

An engine valve, variable technology, applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of poor switching reliability, large moment of inertia and damping loss, etc., to achieve high reliability, reduce moment of inertia and damping Loss, improve the effect of sealing

Inactive Publication Date: 2012-04-04
CHINA JIALING IND GROUP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of large moment of inertia and damping loss of multiple rocker arms in the prior art and poor reliability of high-speed and low-speed intake cam switching, the object of the present invention is to provide a variable valve lift device for an engine, which uses a rocker arm Realize the switching of high and low speed intake cams, the moment of inertia and damping loss are small, the switching reliability is high, and the power universal performance of the engine is improved

Method used

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Embodiment Construction

[0035] Below, refer to the attached Figure 1-9 The specific embodiment of the present invention is described:

[0036] Such as figure 1 As shown, the intake valve of the traditional internal combustion engine is controlled by a cam, and the lift of the valve is not variable.

[0037] Such as figure 2 As shown, the engine valve lift variable device in the prior art, the high-speed intake cam and the low-speed intake cam usually use two or more rocker arms to realize the opening and closing control of the intake valve, although this structure is to a certain extent The air intake adjustment of the engine has been changed, but due to the problems of large moment of inertia and damping loss of multiple rocker arms, and poor reliability of switching between high and low speed intake cams, the performance of the engine cannot be fundamentally changed.

[0038] Such as image 3 As shown, the engine valve lift variable device of the present invention adopts the structure of a v...

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Abstract

The invention relates to an engine valve lift variable device. The engine valve lift variable device comprises a high-speed air inlet cam, a low-speed air inlet cam and a camshaft, wherein the high-speed air inlet cam and the low-speed air inlet cam control the opening and closing of an air inlet valve through the same valve rocker arm; a high-speed air inlet cam control part and a low-speed air inlet cam control part are arranged on the valve rocker arm; and a high-speed and low-speed air inlet cam switching control mechanism is arranged on the high-speed air inlet cam control part. The high-speed air inlet cam and the low-speed air inlet cam control the opening and closing of the air inlet valve through the high-speed air inlet cam control part and the low-speed air inlet cam control part of the same valve rocker arm, so the number of the valve rocker arm is reduced, the rotating inertia and damping loss of the valve rocker arm are reduced, and the switching reliability of the high-speed air inlet cam and the low-speed air inlet cam is improved.

Description

Technical field [0001] The present invention involves a variable -range engine valve lift device that enables the ranging volume of the engine intake valve to match the appropriate valve lift at different speeds of the engine. technical background [0002] The timing and lift technology of the engine can be widely used in automobiles and mature technology.However, for some industries with special requirements, such as the motorcycle industry, due to the factors such as cost and structural volume, the timing and lift technology of the variable trada have not been widely used.Even some applications, most of them use two or more rockers to achieve the open and closing control of the valve. Although the air intake adjustment of the engine has been changed to a certain extent, due to the large rotation of the arm and the damping loss, the high and low speed switchPoor reliability and other issues lead to the universal performance of the engine that cannot be fundamentally changed. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/00F01L1/18
Inventor 刘强徐毅陈光毓谭红梅谢建
Owner CHINA JIALING IND GROUP
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