Mechanical continuous variable valve lift mechanism

A valve lift, mechanical technology, applied in the direction of mechanical equipment, machine/engine, engine components, etc., can solve the problems of difficult control, complex mechanism, not multi-level intelligent control, etc., and achieve the effect of small work wear
CN101701540AInactive Publication Date: 2010-05-05丛培伟
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
丛培伟
Publication Date
2010-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a mechanical continuous variable valve lift mechanism which can lead the lift capacity of an engine valve to be changed into being closed all the way from the maximum according to the preset control value and ensure the valve timing not to be changed. The mechanism comprises a cam (101), an actuating mechanism (20) of a changeable rocker arm, the changeable rocker arm (301), a valve tappet (107), a tappet seat (108), a valve (100) and an auxiliary return spring (403); wherein the actuating mechanism (20) of the changeable rocker arm is provided with a changeable rocker arm shaft (203) which is connected with the changeable rocker arm (301), can control and change the space mechanical characteristics of the changeable rocker arm (301) and used for leading the lift capacity of the valve (100) to be continuously changed. The invention aims at thoroughly solving the problem of variable gas distribution of an internal-combustion engine puzzling the engine industry for dozens of years, omits a throttle valve of the engine, and leads continuous variable valve lift technology to be popularized to a minitype engine with less emission.
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Description

technical field

[0001] The invention relates to a mechanical continuously variable valve lift mechanism, which can make the valve lift of the engine vary from maximum to closed according to a preset control value and keep the valve timing constant. Background technique

[0002] As we all know, because of the requirements of the best air-fuel ratio of the engine, the air volume of the cylinder must be precisely controlled for different working conditions, that is, how much air should be taken in with the throttle, otherwise the combustion will be insufficient and emission problems will occur. Technologies that can precisely control the air distribution of the engine include throttle technology and continuously variable valve lift technology. At present, the engine uses the throttle technology to control the intake air volume of the cylinder, but the throttle technology is not the technology that best meets the engine gas distribution requirements. For the throttle condition,...

Claims

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