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Variable valve driving mechanism of engine

A driving mechanism and engine technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of poor reliability and durability, increased cost, limited application, etc., to achieve simple and compact structure, easy manufacturing and assembly, and wide application. Effect

Active Publication Date: 2015-01-28
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a variable valve drive mechanism for an engine, which will solve the technical problem in the prior art that it is necessary to add a rocker arm to realize another valve movement, especially to increase the rocker arm. The technical problems of occupying space behind the arm, complex structure and control, increased cost, poor reliability and durability, and limited application

Method used

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  • Variable valve driving mechanism of engine
  • Variable valve driving mechanism of engine

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Embodiment Construction

[0022] figure 1 and figure 2 Describes the positional relationship among relevant parts in the embodiment of the engine variable valve drive mechanism of the present invention. These components are an integral part of the valve train 200 of the engine. In this case, the cam roller 235 is rotatably mounted on a roller shaft 231 which is mounted on the component 210 . Component 210 can be a rocker arm of an overhead cam engine, or a cam follower of a pushrod engine (because people are familiar with engines, some engine parts, such as rocker arms, pushrods, and cam followers and valves, etc., not listed here). The roller driving mechanism 100 is arranged in the component 210 . The roller drive mechanism 100 here includes a spring 156 and a piston 164 . One side of the piston 164 (the left side in the figure) is subjected to the force of the spring 156, and the other side of the piston 164 (the right side in the figure) is subject to the force of the fluid (such as engine oi...

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Abstract

The invention discloses a variable valve driving mechanism of an engine. The mechanism comprises an engine valve, cams, a cam roller, a roller shaft, a roller shift fork and a roller driving mechanism, wherein the roller driving mechanism is used for switching the cam roller between a first axial position and a second axial position on the roller shaft through the roller shift fork, so that the cam roller is connected with different cams to produce different engine valve events. The roller driving mechanism comprises a piston and a spring; the piston is connected with one end of the roller shift fork; the other end of the roller shift fork is provided with two separated guide holes; the two separated guide holes sleeve the roller shaft and the cam roller is sandwiched in the middle; the movement of the piston is transferred to the cam roller through the roller shift fork. The cam roller is moved through the roller shift fork by using the roller driving mechanism on the outer side of the cam roller; the mechanism has a simple and compact structure, is durable and reliable in operation and has extremely wide application, such as engine cylinder closing, engine brake, engine exhaust gas recirculation and engine turn-on and turn-off.

Description

Technical field: [0001] The invention relates to the mechanical field, in particular to the field of engine valve driving, in particular to a variable valve driving mechanism of the engine. Background technique: [0002] In the prior art, the conventional valve driving method of the engine is well known, and its application has a history of more than one hundred years. However, due to the additional requirements on engine emissions and engine braking, more and more engines need to add other valve movements on the basis of conventional valve movements, such as valve movements for exhaust gas recirculation and engine braking. Sometimes in order to increase fuel efficiency, the valves of certain cylinders of the engine need to be completely closed (the valve movement is completely lost or eliminated). When the cylinder is closed, in addition to eliminating the valve movement, it also stops injecting fuel into the cylinder. [0003] In order to obtain variable valve movement, f...

Claims

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Application Information

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IPC IPC(8): F01L1/34
Inventor 杨洲
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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