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Universal multi-mode gas distribution mechanism

A gas distribution mechanism and multi-mode technology, applied in mechanical equipment, engine components, engine control, etc., can solve problems such as high fuel consumption, long mileage, and large displacement of a single engine, and achieve reduced fuel consumption and emissions, fast switching, and improved The effect of braking power

Inactive Publication Date: 2019-07-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the number of engines such as trucks is less than that of gasoline engines, due to the large displacement and long mileage of a single engine, the fuel consumption is high and the emissions are bad.

Method used

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  • Universal multi-mode gas distribution mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 It is a schematic diagram of the first embodiment of the universal multi-mode valve train. figure 2 and image 3 They are the expanded schematic diagrams of the intake bushing and the exhaust bushing respectively.

[0041]The intake valve sleeve 202 is provided with an intake driving cam 214 , an intake braking cam 212 , a first intake switching slot 231 and a second intake switching slot 232 . The exhaust valve sleeve 102 is provided with an exhaust driving cam 114 , an exhaust braking cam 112 , a first exhaust switch slot 131 and a second exhaust switch slot 132 . The switching mechanism includes a first intake switching mechanism 221 , a second intake switching mechanism 222 , a first exhaust switching mechanism 121 and a second exhaust switching mechanism 122 . The intake drive cam 214 has a lobe during the intake stroke, the intake detent cam 212 has a lobe near each bottom dead center, the exhaust drive cam 114 has a lobe during the exhaust stroke, an...

Embodiment 2

[0048] Figure 4 It is a schematic diagram of the second embodiment of the universal multi-mode valve train. Compared with embodiment 1, embodiment 2 uses a branched rocker arm to drive a pair of valve assemblies.

Embodiment 3

[0050] Figure 5 It is a schematic diagram of the second embodiment of the universal multi-mode valve train. Figure 6 and Figure 7 They are the expanded schematic diagrams of the intake bushing and the exhaust bushing respectively. The intake valve sleeve 202 is provided with an intake driving cam 214 , an intake zero-lift cam 210 , an intake braking cam 212 , a first intake switching slot 231 and a second intake switching slot 232 . The exhaust valve sleeve 102 is provided with an exhaust driving cam 114 , an exhaust zero-lift cam 110 , an exhaust braking cam 112 , a first exhaust switch slot 131 and a second exhaust switch slot 132 . The phase of the intake camshaft 201 is adjusted by the camshaft phase adjustment mechanism 3 . The switching mechanism includes an intake first switching mechanism 221 , an intake second switching mechanism 222 , an intake third switching mechanism 223 , an exhaust first switching mechanism 121 , an exhaust second switching mechanism 122 a...

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Abstract

The invention relates to a universal multi-mode gas distribution mechanism, and belongs to the field of engine braking. The mechanism comprises gas intake / exhaust valve assemblies, gas intake / exhaustcamshafts, gas intake / exhaust shaft sleeves, a switching mechanism and the like. The gas intake shaft sleeve is at least provided with a gas intake driving cam and a gas intake braking cam, wherein the gas intake driving cam is provided with at least one protrusion in the gas intake stroke, and the raised gas intake braking cam is provided with at least one protrusion close to each lower stop point. The gas exhaust shaft sleeve is at least provided with a gas exhaust driving cam and a gas exhaust braking cam, wherein the gas exhaust driving cam is provided with at least one protrusion in the gas exhaust stroke, and the gas exhaust braking cam is provided with at least one protrusion close to each upper stop point and at each gas exhaust lower stop point. The gas intake shaft sleeve and / orthe gas exhaust shaft sleeve can also be provided with a zero-lift cam. The universal multi-mode gas distribution mechanism realizes an efficient two-stroke braking mode, and the braking power of an engine is improved, specifically, the braking power of the engine is improved by about 56% under a high speed when compared with that of ordinary two-stroke braking, is improved by about 103% when compared with that of pressure reduction braking, and is improved by about 221% when compared with that of gas release braking; and staged braking is realized, and the safety and transportation capabilityof vehicles such as trucks are effectively improved.

Description

technical field [0001] The invention relates to a universal multi-mode gas distribution mechanism, which belongs to the field of engine braking. Background technique [0002] There are many long and steep roads in my country, the weight of trucks is higher than foreign standards, and the problem of overloading and overspeeding of trucks is serious. All these have led to frequent road traffic accidents caused by trucks in my country, and extremely dangerous traffic accidents are mainly caused by large trucks. The main brake system and the retarder of the transmission system such as electromagnetic type and eddy current type are prone to problems such as rapid reduction of braking power caused by overheating after long-term work, but the above-mentioned problems do not exist in engine braking. The braking power of the two-stroke auxiliary braking technology is higher than that of the existing four-stroke braking technology, which is the future development trend. Most of the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06F01L1/26F01L1/053F02D13/02F02D13/04
CPCF01L1/053F01L1/26F01L13/0036F01L13/06F02D13/028F02D13/04
Inventor 崔靖晨隆武强田华
Owner DALIAN UNIV OF TECH
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