CN103573426A - Variable compression ratio mechanism of piston engine - Google Patents
Variable compression ratio mechanism of piston engine Download PDFInfo
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- CN103573426A CN103573426A CN201210279210.XA CN201210279210A CN103573426A CN 103573426 A CN103573426 A CN 103573426A CN 201210279210 A CN201210279210 A CN 201210279210A CN 103573426 A CN103573426 A CN 103573426A
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Abstract
The invention provides a variable compression ratio mechanism of a piston engine. The variable compression ratio mechanism of the piston engine is characterized in that an eccentric shaft sleeve is additionally installed between a connecting rod shaft neck of a crank shaft and a big end of a main connecting rod; the eccentric shaft sleeve can deflect freely; a control shaft and the crank shaft are arranged in parallel; a swing link is installed on the control shaft; the other end of the swing link is connected with a control connecting rod in a hinge way through a hinge shaft; a big round hole is formed in the other end of the control connecting rod, so that the control connecting rod can be sheathed on the outer circle of the eccentric shaft sleeve; the swing link, the control connecting rod and the crank shaft constitute a crank swing link mechanism; a control shaft chain wheel or a control shaft gear is installed on the control shaft; an intermediate chain or an intermediate gear is installed on the hinge shaft; an eccentric shaft sleeve chain wheel or an eccentric shaft sleeve gear is sheathed on the eccentric shaft sleeve; the control shaft is linked with the eccentric shaft sleeve through a chain or gear transmission mechanism; when the control shaft is driven by an actuator to deflect, the eccentric shaft sleeve is driven to deflect; at the moment, the stop position on a piston is changed, so that the compression ratio of the engine is adjusted.
Description
[technical field]
The present invention relates to technical field of automobile engine, adjustable continuously for the compression ratio of piston internal-combustion engine.
[background technique]
In recent decades, in order to improve the discharge of motor car engine power character, Economy and reduction pollutant, many motor manufacturers and scientific research institution have dropped into the research and development that a large amount of human and material resources carry out new technology, and the changeable compression ratio technique of motor is a kind of important new technology wherein.
The compression ratio of cylinder has considerable influence to the performance of explosive motor.Conventionally, do not occur under the prerequisite of pinking in guaranteeing cylinder, the raising compression ratio of trying one's best, is conducive to the raising of engine performance.
The compression ratio that motor can bear under different Operation Conditions is different, but the compression ratio of general motor is immutable, and any operating mode all can only be operated in the compression ratio of design in advance.Changeable compression ratio technique refers in engine working process, can the compression ratio of motor be regulated by control and the executive system being equipped with, make motor when low-load, there is higher compression ratio, to improve fuel consumption and emission performance, and there is lower compression ratio when high load and when pressurization system starts, prevent that engine cylinder internal pressure is excessive and cause the pinking of motor.Adopt changeable compression ratio technique can effectively reduce engine fuel consumption, reduce pollutant emission, significantly improve moment of torsion and the power of motor, obtain good engine performance.
The Patents of changeable compression ratio technique is a lot of at present, technological approaches also has a variety of, adds accentric support, rod journal adds accentric support, movable air cylinder cap method and oscillating cylinder cover method etc. as accentric support cover, crankshaft main journal are set on firing chamber completion method, variable piston, many link rod methods, gear type connecting rod, wrist pin.But due to be really applied on motor also seldom, the domestic motor that also there is no so far an a variable compression ratio occurs.
[summary of the invention]
The object of the invention is to propose a kind of simple in structure, reliability is high, low cost of manufacture, can directly be applied on existing fixedly compression ratio engine, and without engine body structure being carried out to too large change with regard to attainable changeable compression ratio technique.
Mentality of designing of the present invention is that the technological approaches that adds accentric support on the rod journal based on bent axle proposes.Variable compression ratio of engines mechanism comprises bent axle, is arranged on excentric sleeve, swing-bar mechanism, Control Shaft and sprocket chain strip transmission mechanism or gear drive on rod journal.Excentric sleeve is arranged between the rod journal and master connecting rod major part of bent axle, and excentric sleeve can free deflection.Control Shaft placement parallel with bent axle, is equipped with a fork on Control Shaft, fork can freely swing around Control Shaft.The hinged control link of the other end of fork, the other end of control link has a big hole, is enclosed within on the periphery of excentric sleeve, and fork, control link and bent axle have formed a crank-rocker mechanism.On Control Shaft, be coaxially installed with Control Shaft sprocket wheel or gear, intermediate chain wheel or gear are installed on the hinging shaft of fork and control link, have excentric sleeve sprocket wheel or gear on excentric sleeve, Control Shaft links by chain or gear drive and excentric sleeve.
Working principle of the present invention is:
When motor receives compression ratio adjustment instruction, Control Shaft turns over predetermined angle under the drive of certain actuator, by chain or gear drive, drive the identical angle of excentric sleeve deflection on rod journal, the position of piston top dead center changes thereupon, and the compression ratio of motor is adjusted.
The invention has the beneficial effects as follows:
1. with respect to current variable compression ratio of engines technology, of the present invention simple in structure, cost is low, and reliability is high, and the compression ratio of realizing motor with few component is adjustable continuously.
2. can be applied on existing fixedly compression ratio engine, make motor there is the function of variable compression ratio, and do not need engine body structure to carry out larger change.
[accompanying drawing explanation]
Fig. 1 first kind variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram
Excentric sleeve structural upright schematic diagram in Fig. 2 the present invention
Excentric sleeve structural plan schematic diagram in Fig. 3 the present invention
Fig. 4 first kind variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram
Two kinds of compression ratio state working procedure schematic diagram of Fig. 5 first kind variable compression ratio of engines of the present invention mechanism
Fig. 6 Equations of The Second Kind variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram
Fig. 7 Equations of The Second Kind variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram
Fig. 8 San Lei variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram
Fig. 9 San Lei variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram
Above accompanying drawing is the technical description to the principle of the invention only, has shown each feature of basic principle of the present invention in accompanying drawing, and each structural member of accompanying drawing is not to draw completely in proportion.
[embodiment]
Below in conjunction with accompanying drawing, further illustrate the present invention.It should be noted that, in this specification, not limit the present invention to the exemplary embodiment in accompanying drawing, and covered various replacements, modification, equivalents within the scope of the present invention by described in claims.As long as adopted the improvement that method of the present invention is conceived and technological scheme is carried out or be directly used in other occasion without improvement, all within the scope of protection of the invention.
Shown in Fig. 1 is first kind variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram, therefrom can substantially understand basic structure and the combining form of first kind variable compression ratio of engines of the present invention mechanism.Comprise piston 1, master connecting rod 2, bent axle 3, excentric sleeve 4, excentric sleeve sprocket wheel 5, the first chain 6, the first intermediate chain wheel 7, the second intermediate chain wheel 8, the second chain 9, Control Shaft 10, Control Shaft sprocket wheel 11, fork 12, control link 13 and hinging shaft 14.
Shown in Fig. 2 is the schematic perspective view of excentric sleeve 4 in the present invention.Excentric sleeve 4 is split type structure, has excentric sleeve sprocket wheel 5 on the periphery of excentric sleeve 4.
Shown in Fig. 3 is the floor map of excentric sleeve 4 in the present invention.Between the inner headed face of excentric sleeve 4 and the center of circle of periphery, have certain distance, this distance is called the throw of eccentric of excentric sleeve 4.The throw of eccentric of excentric sleeve 4 is set to half of piston 2 top dead center position excursions.For example, engine compression ratio is from height adjustment when minimum, and the excursion of piston 2 top dead center positions is δ, and the throw of eccentric of excentric sleeve is set to δ/2.
Fig. 4 is first kind variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram, the position relationship of piston top dead center position and each parts while having shown low compression ratio and high compression ratio two states in figure.Control Shaft 10 is controlled the deflection angle of excentric sleeve 4 by sprocket chain strip transmission mechanism.When Control Shaft 10 rotates or locks, by chain drive, control excentric sleeve 4 and rotate or locking.The deflection of excentric sleeve 4, changes the position of piston 1 top dead center by master connecting rod 2, realizes the adjustment of engine compression ratio.
Fig. 5 is two kinds of compression ratio state working procedure schematic diagram of first kind variable compression ratio of engines mechanism of the present invention, in figure, upper half part has shown under low compression ratio state, each component locations relation of motor in one week process of crankshaft rotating when 0 °, 90 °, 180 ° and 270 ° of four positions.In figure, lower half portion has shown under high compression ratio state, each component locations relation of motor in the crankshaft rotating process of a week when 0 °, 90 °, 180 ° and 270 ° of four positions.
Fig. 6 is Equations of The Second Kind variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram.Comprise piston 1, master connecting rod 2, bent axle 3, excentric sleeve 4, excentric sleeve gear 15, the first driving gear 16, intermediate gear 17, the second driving gear 18, Control Shaft gear 19, Control Shaft 10, fork 12, control link 13, the first gear shaft 20, the second gear shaft 21 and hinging shaft 14.
Equations of The Second Kind variable compression ratio of engines mechanism and first kind variable compression ratio of engines mechanism principle are basic identical, and difference is: Equations of The Second Kind variable compression ratio of engines mechanism is replaced by gear drive the chain drive in first kind variable compression ratio of engines mechanism.Excentric sleeve sprocket wheel 5 on excentric sleeve 4 is replaced by excentric sleeve gear 15, and the Control Shaft sprocket wheel 11 on Control Shaft 10 is replaced by Control Shaft gear 19, and intermediate gear 17 is arranged on hinging shaft 14.Excentric sleeve gear 15, intermediate gear 17 are identical with the number of teeth with Control Shaft gear 19 three's diameters, and are connected with a joggle by the first driving gear 16 and the second driving gear 18.The first driving gear 16 and the second driving gear 18 are arranged on control link 13 and fork 12 by the first gear shaft 20 and the second gear shaft 21 respectively.Control Shaft 10 carries out regulation and control by the deflection angle of Control Shaft gear 11, the second driving gear 18, intermediate gear 17, the first driving gear 16 and 15 pairs of excentric sleeves 4 of excentric sleeve gear, in adjustment process, between Control Shaft 10 and excentric sleeve 4, keep identical phase place.
Fig. 7 Equations of The Second Kind variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram.The position relationship of each parts of motor while having shown low compression ratio and high compression ratio two states in figure.When Control Shaft 10 rotates or locks, by gear drive, control excentric sleeve 4 and rotate or locking.The deflection of excentric sleeve 4, changes the position of piston 1 top dead center, realizes the adjustment of engine compression ratio.
Fig. 8 is San Lei variable compression ratio of engines of the present invention mechanism primary clustering exploded perspective schematic diagram.Comprise piston 1, master connecting rod 2, bent axle 3, excentric sleeve 4, excentric sleeve gear 15, intermediate gear 17, Control Shaft gear 19, Control Shaft 10, fork 12, control link 13 and hinging shaft 14.
San Lei variable compression ratio of engines mechanism and Equations of The Second Kind variable compression ratio of engines mechanism principle are basic identical, and difference is: the 3rd class variable compression ratio is removed the first driving gear 16 in Equations of The Second Kind variable compression ratio and the second driving gear 18.Excentric sleeve gear 15, intermediate gear 17 and Control Shaft gear 19 directly mesh.
Fig. 9 is San Lei variable compression ratio of engines of the present invention mechanism Principles of Regulation schematic diagram, the position relationship of each parts of motor while having shown low compression ratio and high compression ratio two states in figure.When Control Shaft 10 rotates or locks, by gear drive, control excentric sleeve 4 and rotate or locking.The deflection of excentric sleeve 4, changes the position of piston 1 top dead center, realizes the adjustment of engine compression ratio.
For San Lei variable compression ratio of engines mechanism, Control Shaft 10 can only be controlled the phase place of excentric sleeve 4 when piston top dead center.In the rotary course of bent axle 3, between Control Shaft 10 and excentric sleeve 4, cannot keep identical phase relationship.Even if Control Shaft 10 maintains static, excentric sleeve 4 phase places also can change by generating period along with the rotation of bent axle 3.
Claims (4)
1. a reciprocating engine variable compression ratio, comprise master connecting rod, bent axle, excentric sleeve, Control Shaft, fork, control link and chain drive or gear drive, excentric sleeve is arranged between the rod journal and master connecting rod major part of bent axle, and can free deflection, the axial location of Control Shaft is fixed and is parallel with the axis of bent axle, it is characterized in that: a fork is housed on Control Shaft, between Control Shaft and fork, be not fixedly connected with, fork can freely rotate around Control Shaft, the other end of fork is hinged by hinging shaft and control link, the other end of control link has a big hole, be enclosed within on the cylindrical of excentric sleeve, on Control Shaft, be installed with Control Shaft sprocket wheel or Control Shaft gear, intermediate chain wheel or intermediate gear are installed on the hinging shaft between fork and control link, on excentric sleeve, there are excentric sleeve sprocket wheel or excentric sleeve gear, Control Shaft links by chain transmission mode or gear transmission mode and excentric sleeve.
2. reciprocating engine variable compression ratio as claimed in claim 1, it is characterized in that: on excentric sleeve periphery, there is excentric sleeve sprocket wheel, on Control Shaft, be coaxially installed with Control Shaft sprocket wheel, the first intermediate chain wheel and the second intermediate chain wheel are arranged on the hinging shaft between fork and control link, the first intermediate chain wheel and the second intermediate chain wheel are fixed together or are structure as a whole, excentric sleeve sprocket wheel and the first intermediate chain wheel are by the first chain connection for transmission, and Control Shaft sprocket wheel and the second intermediate chain wheel are by the second chain connection for transmission.
3. reciprocating engine variable compression ratio as claimed in claim 1, it is characterized in that: on excentric sleeve periphery, there is excentric sleeve gear, on Control Shaft, be coaxially installed with Control Shaft gear, intermediate gear is arranged on the hinging shaft between fork and control link, between Control Shaft gear and intermediate gear, pass through the second driving gear engagement driving, between intermediate gear and excentric sleeve gear, by the first driving gear engagement driving, the first driving gear and the second driving gear are arranged on respectively on control link and fork.
4. reciprocating engine variable compression ratio as claimed in claim 1, it is characterized in that: on excentric sleeve periphery, there is excentric sleeve gear, on Control Shaft, be coaxially installed with Control Shaft gear, intermediate gear is arranged on the hinging shaft between fork and control link, Control Shaft gear and intermediate gear engagement, intermediate gear and the engagement of excentric sleeve gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210279210.XA CN103573426A (en) | 2012-08-07 | 2012-08-07 | Variable compression ratio mechanism of piston engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210279210.XA CN103573426A (en) | 2012-08-07 | 2012-08-07 | Variable compression ratio mechanism of piston engine |
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| CN103573426A true CN103573426A (en) | 2014-02-12 |
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| CN201210279210.XA Pending CN103573426A (en) | 2012-08-07 | 2012-08-07 | Variable compression ratio mechanism of piston engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089780A (en) * | 2014-05-13 | 2015-11-25 | F·波尔希名誉工学博士公司 | Switchover valve and internal combustion engine |
| CN107201945A (en) * | 2017-07-21 | 2017-09-26 | 泸州职业技术学院 | A kind of variable compression ratio engine |
| CN108425746A (en) * | 2018-04-16 | 2018-08-21 | 吉林大学 | A kind of worm and gear drive-type variable-compression-ratio piston link assembly |
| CN110118250A (en) * | 2018-02-05 | 2019-08-13 | 安里千 | A kind of switching mechanism of chain-crankshaft linkage |
| CN110966088A (en) * | 2018-09-30 | 2020-04-07 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN110966087A (en) * | 2018-09-30 | 2020-04-07 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN113653563A (en) * | 2021-08-19 | 2021-11-16 | 东风汽车集团股份有限公司 | Driving connection structure of variable compression ratio mechanism |
-
2012
- 2012-08-07 CN CN201210279210.XA patent/CN103573426A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089780A (en) * | 2014-05-13 | 2015-11-25 | F·波尔希名誉工学博士公司 | Switchover valve and internal combustion engine |
| CN105089780B (en) * | 2014-05-13 | 2017-07-21 | F·波尔希名誉工学博士公司 | Switching valve and explosive motor |
| CN107201945A (en) * | 2017-07-21 | 2017-09-26 | 泸州职业技术学院 | A kind of variable compression ratio engine |
| CN110118250A (en) * | 2018-02-05 | 2019-08-13 | 安里千 | A kind of switching mechanism of chain-crankshaft linkage |
| CN110118250B (en) * | 2018-02-05 | 2023-04-14 | 安里千 | Chain-crankshaft linkage conversion mechanism |
| CN108425746A (en) * | 2018-04-16 | 2018-08-21 | 吉林大学 | A kind of worm and gear drive-type variable-compression-ratio piston link assembly |
| CN110966088A (en) * | 2018-09-30 | 2020-04-07 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN110966087A (en) * | 2018-09-30 | 2020-04-07 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN110966087B (en) * | 2018-09-30 | 2021-08-03 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN110966088B (en) * | 2018-09-30 | 2021-09-21 | 长城汽车股份有限公司 | Eccentric shaft drive mechanism and variable compression ratio mechanism |
| CN113653563A (en) * | 2021-08-19 | 2021-11-16 | 东风汽车集团股份有限公司 | Driving connection structure of variable compression ratio mechanism |
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Application publication date: 20140212 |