Engine valve lift variable mechanism
An engine valve, variable technology, applied to engine components, machines/engines, mechanical equipment, etc., can solve the problem of large moment of inertia and damping loss, poor switching reliability of high and low speed intake cams, and small rocker arm rotational inertia and damping loss. and other problems, to achieve the effect of reducing the moment of inertia and damping loss, high reliability, and reducing the number of
Inactive Publication Date: 2012-04-04
CHINA JIALING IND GROUP
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Problems solved by technology
[0003] In order to solve the problems in the prior art that the moment of inertia and damping loss of multiple rocker arms are large, and the switching reliability of high and low speed intake cams is poor, the purpose of the present invention is to provide an engine valve lift variable mechanism, the high speed intake cam and the low speed intake cam The intake cam controls the opening and closing of the intake valve through the same valve rocker arm, the rocker arm moment of inertia and damping loss are small, the switching reliability is high, and the power universal performance of the engine is improved
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[0021] like figure 1 As shown, the opening and closing of the intake valve of the traditional internal combustion engine is controlled by a cam, and the valve lift cannot be changed.
[0022] like 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 realize the opening and closing control of the intake valve through two or more rocker arms, although to a certain extent the The air intake adjustment of the engine, but due to the problems of large moment of inertia, high damping, and untimely switching response of high and low speed intake cams in multiple rocker arms, the performance of the engine cannot be fundamentally changed.
[0023] Figure 3 to Figure 5 It is a structural diagram of the engine valve lift variable mechanism of the present invention.
[0024] like image 3 As shown, one end of the camshaft 4 is fixedly provided with a timing sprocket 5, and the other end is fixedly pr...
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The invention relates to an engine valve lift variable mechanism. A high-speed air inlet cam and a low-speed air inlet cam control the opening and closing of an air inlet valve through the same valve rocker arm; and a high-speed and low-speed air inlet cam switching control mechanism is arranged on a camshaft. 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 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 invention relates to an engine valve lift variable mechanism, which can match the lift amount of the intake valve of the engine with the appropriate valve lift under different engine speeds. technical background [0002] Engine variable valve timing and lift technology is widely used in automobiles, and the technology is mature. However, for some industries with special requirements, such as the motorcycle industry, variable valve timing and lift technology has not been widely used due to constraints such as cost and structural volume. Even in some applications, two or more rocker arms are mostly used to realize the opening 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 moment of inertia and damping loss of multiple rocker arms, high and low speed switching Poor reliability and other issues, resulting in the universal performance of the engine can not be fun...
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Inventor 刘强徐毅陈光毓谭红梅谢建
Owner CHINA JIALING IND GROUP