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Multi-mode air distribution mechanism and control method thereof

A gas distribution mechanism, multi-mode technology, applied in the direction of mechanical equipment, engine components, machines/engines, etc., can solve the problems that cannot meet the requirements of multi-mode engines, achieve small cam force, reduce cost, length of bushing and bushing The effect of short movement distance

Inactive Publication Date: 2019-03-12
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Since most of the existing practical variable valve trains are used in four-stroke drive mode engines and cannot meet the requirements of multi-mode engines, a set of valve trains with high reliability, simple and compact structure and meeting the requirements of multi-mode engines has been developed. imperative

Method used

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  • Multi-mode air distribution mechanism and control method thereof
  • Multi-mode air distribution mechanism and control method thereof
  • Multi-mode air distribution mechanism and control method thereof

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Embodiment Construction

[0045] The present invention relates to a multi-mode valve train, which includes a first camshaft 101, a second camshaft 102, a first bushing 201, a second bushing 202, an exhaust valve assembly, an intake valve assembly and the like. The first camshaft 101 drives the first shaft sleeve 201 to rotate through the spline, and the second camshaft 102 drives the second shaft sleeve 202 to rotate through the spline. The first bushing 201 is provided with a first intake two-stroke cam 612A, a first intake four-stroke cam 614A, a second intake two-stroke cam 622A, a second intake four-stroke cam 624A, a first switching slot 301 and a second intake cam. The second switch slot 302, the second bushing 202 is provided with the first exhaust two-stroke cam 612B, the first exhaust four-stroke cam 614B, the second exhaust two-stroke cam 622B, the second exhaust four-stroke cam 624B, the third exhaust cam switching slot 303 and a fourth switching slot 304 . The first intake rocker arm 51A c...

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Abstract

The invention discloses a multi-mode air distribution mechanism and a control method thereof and belongs to the field of engine air distribution mechanisms, cylinder stopping and auxiliary braking. The multi-mode air distribution mechanism comprises a first shaft sleeve which is driven by a first cam shaft through a spline, a second shaft sleeve which is driven by a second cam shaft through a spline, a switching mechanism, a braking rocker arm and the like. By means of the multi-mode air distribution mechanism and the control method thereof, the braking rocker arm is arranged, when the brakingrocker arm corresponds to the shaft sleeve switching stage, the braking rocker arm can be maintained in a failure state, and shaft sleeve switching is conducted when the braking rocker arm corresponds to a non-public base circle section of the cams. Four-stroke classified driving, four-stroke classified braking, two-stroke classified braking and other modes of an engine can be flexibly switched by controlling the switching mechanism and the braking arm, and the economical efficiency, the emission performance, safety and the transportation capability of vehicles are improved; and the mechanismis compact in structure, and the requirement for small inter-cylinder distance engine arrangement is met.

Description

technical field [0001] The invention relates to a multi-mode gas distribution mechanism and a control method thereof, belonging to the fields of engine gas distribution mechanism, cylinder deactivation and auxiliary braking. Background technique [0002] With the rapid increase of the number of engines, energy and environmental issues as well as traffic safety issues have become one of the major issues restricting my country's sustainable development. Because of its ability to effectively reduce engine fuel consumption and emissions, cylinder deactivation technology has attracted much attention. Engine downsizing (Down-size) and low-speed (Down-speed) have become a recognized development trend of energy saving and emission reduction. When the engine brakes, the smaller the bore and the lower the speed, the worse the braking effect. As the vehicle's own braking ability continues to weaken, freight requirements continue to increase, the road environment is complex and change...

Claims

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Application Information

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IPC IPC(8): F01L1/06F01L1/18F01L1/46F01L1/38F01L13/06
CPCF01L1/06F01L1/181F01L1/38F01L1/46F01L13/06
Inventor 崔靖晨田华隆武强
Owner DALIAN UNIV OF TECH
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