CN100564829C - A kind of pressure ratio adjustable engine - Google Patents
A kind of pressure ratio adjustable engine Download PDFInfo
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- CN100564829C CN100564829C CNB2007100567958A CN200710056795A CN100564829C CN 100564829 C CN100564829 C CN 100564829C CN B2007100567958 A CNB2007100567958 A CN B2007100567958A CN 200710056795 A CN200710056795 A CN 200710056795A CN 100564829 C CN100564829 C CN 100564829C
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- fork
- pressure ratio
- cam pin
- auxiliary drive
- drive wheels
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Abstract
The invention discloses a kind of pressure ratio adjustable type engines, comprise at least one cylinder, piston, piston links to each other with crank by upper and lower strut, it also comprises one or two fork, the upper tip of lower link that connects the lower end of last connecting rod of piston and connecting crank is hinged by a cam pin that is fixed with one or two auxiliary drive wheels on it, the center line of the center line of the center line of cam pin and the described upward lower end of connecting rod or the upper tip of lower link is eccentric to be provided with, described fork one end links to each other with described cam pin, but the other end directly is hinged on the cylinder body and is provided with the active drive wheel of one or two controlled rotation on this hinging shaft, and can rotate between described active drive wheel and the described auxiliary drive wheels cooperates.Apparatus of the present invention can be regulated the pressure ratio of motor in real time, thereby guarantee that motor through the work under the higher thermal efficiency of cycle of being everlasting, improves fuel efficiency greatly and has lower exhaust emission again.
Description
Technical field
The present invention relates to a kind of improvement of internal-combustion engine, relate in particular to a kind of pressure ratio adjustable engine.
Background technique
The conventional reciprocating internal-combustion piston engine is owing to the structural limitations of connecting rod, and pressure ratio is unadjustable, has therefore limited the raising of its performance.Along with the internal-combustion piston engine reported as (EP-0292603) patent has appearred in technological progress, its structure as shown in Figure 1.Be characterized in: piston is connected with crank by upper and lower strut, and an end points and a fork in the upper and lower strut hinged place section of stretching out on the last connecting rod are hinged, and the other end of fork is supported on the eccentric mass of engine cylinder-body.But its deficiency is that at first this mechanism's eccentric mass only changes the angle of upper and lower strut when rotating, and very little to the influence that piston position produces, pressure ratio changes too little; Secondly, the dynamic performance of motor obviously changed when eccentric mass rotated, so that this patent specification is not stated is any in advantage aspect this and application.
Summary of the invention
The object of the present invention is to provide a kind of pressure ratio adjustable engine, this motor pressure ratio can be regulated with working conditions change, thereby can improve the engine cycles thermal efficiency, combine with other technologies such as superchargings, also can obviously improve the engine fuel Economy, improve power performance, dwindle discharge capacity, reduce exhaust pollution.
A kind of pressure ratio adjustable type engines of the present invention, comprise at least one cylinder, be arranged on the piston in the described cylinder, described piston links to each other with crank by upper and lower strut, it also comprises one or two fork, the upper tip of lower link that connects the lower end of last connecting rod of piston and connecting crank is hinged by a cam pin that is fixed with one or two auxiliary drive wheels on it, the center line of the center line of the center line of described cam pin and the described upward lower end of connecting rod or the upper tip of lower link is eccentric to be provided with, described fork one end links to each other with described cam pin, but the other end directly is hinged on the cylinder body and is provided with the active drive wheel of one or two controlled rotation on this hinging shaft, and can rotate between described active drive wheel and the described auxiliary drive wheels cooperates.
In the piston motion process, when not needing to change pressure ratio, the invariant position of active drive wheel, cam pin invariant position at this moment, thus guaranteed that the invariant position of piston when top dead center guaranteed that motor is keeping steady running under the constant pressure ratio.When needs change under the motor pressure ratio situation, can implement to rotate to controlled active drive wheel according to the engine operating condition needs by control mechanism, and controlled auxiliary drive wheels is rotated, changed the position of the cam pin affixed, thereby the position of piston top dead center is changed and changed the pressure ratio of motor with it.So just can accomplish to regulate in real time the pressure ratio of motor, thereby guarantee motor, improve fuel efficiency greatly and take into account it again and have lower exhaust emission through the work of being everlasting under the higher thermal efficiency of cycle according to the needs of engine operating condition.Because the raising of pressure ratio improves the hot merit conversion efficiency, can do more merit under the same fuel consumption in addition.Therefore the pressure ratio that improves motor can be improved engine power performance simultaneously, under the same power situation of output, can reduce the discharge capacity of motor, further reduces the engine mechanical loss, improves the power per liter of motor.
Description of drawings
Fig. 1 is the engine structure schematic representation of institute's referenced patents;
Fig. 2 is the structural representation of a kind of pressure ratio adjustable engine of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
A kind of pressure ratio adjustable type engines of the present invention as shown in Figure 2, comprise at least one cylinder 6, be arranged on the piston 1 in the described cylinder, described piston 1 is by upper and lower strut 2,3 link to each other with crank 5, it also comprises one or two fork 4, the upper tip of lower link 3 that connects the lower end of last connecting rod 2 of piston and connecting crank 5 is hinged by a cam pin 7 that is fixed with one or two auxiliary drive wheels 8 on it, the center line of the center line of the center line of described cam pin 7 and the described upward lower end of connecting rod 2 or the upper tip of lower link is eccentric to be provided with, described fork 4 one ends link to each other with described cam pin 7, but the other end directly is hinged on the cylinder body and is provided with the active drive wheel 9 of one or two controlled rotation on this hinging shaft, described active drive wheel 9 can drive described auxiliary drive wheels 8 and rotate, the crankshaft center of described crank can be arranged in the crank rod movement plane on the cylinder centerline, and also cylinder centerline has eccentric distance e and eccentric the setting relatively.The center line of the center line of described cam pin center line and the described upward lower end of connecting rod or the upper tip of lower link has throw of eccentric, and its numerical value should make pressure ratio≤22 of motor.Described driving wheel can be a kind of in gear, sprocket wheel or the friction wheel, can drive by the train of gearings with strong shock resistance, the accurate advantage of regulation and control between described active drive wheel and the auxiliary drive wheels maybe can drive by modes such as chain, friction wheel, belts.Described upper and lower strut and fork can make up the shape rod member for single head bar or wishbone or both.Described upper and lower strut fork and the auxiliary drive wheels inside and outside arrangement on hinging shaft can be changed, and the interior external sorting of upper and lower strut and fork is arbitrarily, in the middle of for example lower link can being arranged in, secondly is to go up connecting rod and fork.Auxiliary drive wheels can be with active drive wheel so that to drive and reduce stress be that principle is arranged as far as possible, for example when fork is two, an auxiliary drive wheels and an active drive can be taken turns the centre that is separately fixed on cam pin and the hinging shaft and is in two forks.When fork is one, when active drive wheel and an auxiliary drive only are set, two-wheeled can be separately fixed on cam pin and the hinging shaft and be in the homonymy of fork; When two auxiliary drive wheels and two active drive wheels were set, an auxiliary drive wheels and an active drive wheel were one group of driving wheel, two groups of driving wheels can be separately positioned on the both sides of fork, promptly are that the center is symmetrical arranged with the fork.
The contrast accompanying drawing is analyzed, the present invention with the obvious difference of ratio engine is the upper tip of lower end and the lower link 3 of connecting crank 5 that connects the last connecting rod 2 of piston is directly passed to the bent axle that its center line and cylinder axis can have off-centre with power by crank and come transferring power by cam pin is hinged.And fork 4 one ends directly are hinged on the engine cylinder-body, and the other end then is connected on the cam pin; But the auxiliary drive wheels 8 that is arranged on the cam pin can be by the active drive wheel drive of the controlled rotation on the hinging shaft that is arranged on fork 4 and cylinder body rounded end, the train of gearings transmission that driving mode not only can constitute by gear but also can pass through chain, modes such as friction wheel or belt drive.Generally speaking, when crank rotated, upper and lower strut 2 and 3 was subjected to fork 4 controls, makes engine running; When needs are adjusted pressure ratio, the auxiliary drive wheels of device on cam pin rotated, thereby being changed, piston position changes the pressure ratio of motor.
Motor after above-mentioned improvement has following advantage in conjunction with the accompanying drawings:
Motor after above-mentioned improvement, as shown in Figure 2, because the position of piston when top dead center can be controlled by the position of the set cam pin 7 in upper and lower strut 2 and 3 interconnective ends, and the auxiliary drive wheels 8 affixed with cam pin, the active drive that be hinged on the cylinder body by its bearing pin is taken turns 9 controls.Therefore in the piston motion process, when not needing to change pressure ratio, the invariant position of active drive wheel, cam pin invariant position at this moment, thus guaranteed that the invariant position of piston when top dead center guaranteed that motor is keeping steady running under the constant pressure ratio.When needs change under the motor pressure ratio situation, can implement to rotate to controlled active drive wheel 9 according to the engine operating condition needs by control mechanism, and controlled auxiliary drive wheels 8 is rotated, changed the position of the cam pin affixed 7, thereby the position of piston top dead center is changed and changed the pressure ratio of motor with it.So just can accomplish to regulate in real time the pressure ratio of motor, thereby guarantee motor, improve fuel efficiency greatly and take into account it again and have lower exhaust emission through the work of being everlasting under the higher thermal efficiency of cycle according to the needs of engine operating condition.Because the raising of pressure ratio improves the hot merit conversion efficiency, can do more merit under the same fuel consumption in addition.Therefore the pressure ratio that improves motor can be improved engine power performance simultaneously, under the same power situation of output, can reduce the discharge capacity of motor, further reduces the engine mechanical loss, improves the power per liter of motor.And by contrast, traditional combustion engine is spark-ignition type internal combustion engine particularly, because its mechanics limit, has constant pressure ratio, be that the position of piston when top dead center is constant, this makes the motor lower pressure ratio of having to use under many operating modes, to avoid malcombustions such as pinking, therefore motor often is operated under the lower thermal efficiency of cycle, greatly reduces the fuel economy of motor.In addition, as shown in Figure 1 the institute quote in the motor, connected a fork 17 on the extension of its upper and lower strut 13,12, and the other end of fork is connected on the eccentric mass.Because this mechanism's eccentric mass only changes the angle of upper and lower strut when rotating, less to the influence that piston position produces, therefore too little to the change of pressure ratio; And eccentric mass when rotating the dynamic performance of motor obviously change, so that this patent specification is not stated is any in the advantage and the application that change aspect the motor pressure ratio.Therefore under the still the same working state that is operated in constant pressure ratio of this motor with conventional engines.
To sum up state, a kind of pressure ratio adjustable engine provided by the invention has following major advantage:
The low speed torque of engine output is big, power is high, and Fuel Consumption is few. Economy and the dynamic property of automobile-used machine operating mode commonly used Good. Combine with igniting or injection advance angle adjusting, EGR, supercharging and other variable techniques etc., not only can reduce discharging but also can Keep good economy, dynamic property and higher power per liter and dwindle discharge capacity. On basis of the present invention, can use existing any The internal combustion engine advanced technology.
Claims (7)
1. pressure ratio adjustable type engines, comprise at least one cylinder, be arranged on the piston in the described cylinder, described piston links to each other with crank by upper and lower strut, it is characterized in that: it also comprises one or two fork, the upper tip of lower link that connects the lower end of last connecting rod of piston and connecting crank is hinged by a cam pin that is fixed with one or two auxiliary drive wheels on it, the center line of the center line of the center line of described cam pin and the described upward lower end of connecting rod or the upper tip of lower link is eccentric to be provided with, described fork one end links to each other with described cam pin, but the other end directly is hinged on the cylinder body and is provided with the active drive wheel of one or two controlled rotation on this hinging shaft, and can rotate between described active drive wheel and the described auxiliary drive wheels cooperates.
2. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: can maybe can drive by the train of gearings driving between described active drive wheel and the auxiliary drive wheels by chain, friction wheel, belt mode.
3. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: described driving wheel is a kind of in gear, sprocket wheel or the friction wheel.
4. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: described upper and lower strut and fork are that single head bar or wishbone or both make up the shape rod member.
5. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: described upper and lower strut fork and the auxiliary drive wheels inside and outside arrangement on hinging shaft can be changed.
6. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: described fork is that two described auxiliary drive wheels and an active drive are taken turns the centre that is separately fixed on described cam pin and the hinging shaft and is in two forks; Perhaps described fork is one, and described active drive wheel and auxiliary drive are separately fixed on cam pin and the hinging shaft and are in the homonymy of fork; Perhaps described fork is one, an auxiliary drive wheels and an active drive wheel during described two auxiliary drive wheels and two active drive are taken turns are one group of driving wheel, and described two groups of driving wheels are the both sides that the center is symmetricly set on described fork respectively with the fork.
7. according to the said a kind of pressure ratio adjustable type engines of claim 1, it is characterized in that: the crankshaft center of described crank is arranged on the cylinder centerline in the crank rod movement plane, and perhaps cylinder centerline is eccentric relatively is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100567958A CN100564829C (en) | 2007-02-13 | 2007-02-13 | A kind of pressure ratio adjustable engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100567958A CN100564829C (en) | 2007-02-13 | 2007-02-13 | A kind of pressure ratio adjustable engine |
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| Publication Number | Publication Date |
|---|---|
| CN101016860A CN101016860A (en) | 2007-08-15 |
| CN100564829C true CN100564829C (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100567958A Expired - Fee Related CN100564829C (en) | 2007-02-13 | 2007-02-13 | A kind of pressure ratio adjustable engine |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4941231B2 (en) * | 2007-10-26 | 2012-05-30 | 日産自動車株式会社 | Multilink engine link geometry |
| CN102022189B (en) * | 2009-09-14 | 2013-01-02 | 中国农业大学 | Piston-type high-efficiency large-torque output engine |
| CN101701548B (en) * | 2009-11-20 | 2012-09-05 | 天津大学 | Engine with adjustable compression ratio |
| CN103114908B (en) * | 2013-03-11 | 2014-12-17 | 范伟俊 | Engine with compression ratios variable |
| CN104653290B (en) * | 2015-01-20 | 2017-04-12 | 西南交通大学 | Parameter-adjustable intelligent high performance engine main framework |
| CN105240119B (en) * | 2015-11-11 | 2018-09-18 | 陆友玲 | A kind of compression engine that when discharge capacity can be changed |
| CN111156083A (en) * | 2020-01-17 | 2020-05-15 | 东风汽车集团有限公司 | Variable compression ratio mechanism and variable compression ratio engine |
| CN112610340B (en) * | 2020-12-08 | 2022-03-18 | 东风汽车集团有限公司 | Engine movement structure with variable compression ratio |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3633429A (en) * | 1970-06-08 | 1972-01-11 | Thorvald N Olson | Piston stroke control mechanism |
| US3693463A (en) * | 1970-08-03 | 1972-09-26 | Wilbur G Garman | Linkage for a reciprocating engine crankshaft |
| US4437438A (en) * | 1980-08-13 | 1984-03-20 | Gerhard Mederer | Reciprocating piston engine |
| GB2190959A (en) * | 1986-05-31 | 1987-12-02 | Ford Motor Co | Reciprocating piston I.C. engine |
| US4957069A (en) * | 1987-05-08 | 1990-09-18 | Gerhard Mederer | Driving or working engine, in particular an internal combustion engine |
| US5595146A (en) * | 1994-10-18 | 1997-01-21 | Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft | Combustion engine having a variable compression ratio |
| CN1295181A (en) * | 2000-12-29 | 2001-05-16 | 天津大学 | Reciprocating piston type internal combustion engine |
| JP2002317663A (en) * | 2001-04-23 | 2002-10-31 | Nippon Soken Inc | Engine with variable compression ratio |
| GB2392475A (en) * | 2002-08-27 | 2004-03-03 | Edward Allen | I.c. engine connecting rod arrangement |
-
2007
- 2007-02-13 CN CNB2007100567958A patent/CN100564829C/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3633429A (en) * | 1970-06-08 | 1972-01-11 | Thorvald N Olson | Piston stroke control mechanism |
| US3693463A (en) * | 1970-08-03 | 1972-09-26 | Wilbur G Garman | Linkage for a reciprocating engine crankshaft |
| US4437438A (en) * | 1980-08-13 | 1984-03-20 | Gerhard Mederer | Reciprocating piston engine |
| GB2190959A (en) * | 1986-05-31 | 1987-12-02 | Ford Motor Co | Reciprocating piston I.C. engine |
| US4957069A (en) * | 1987-05-08 | 1990-09-18 | Gerhard Mederer | Driving or working engine, in particular an internal combustion engine |
| US5595146A (en) * | 1994-10-18 | 1997-01-21 | Fev Motorentechnik Gmbh & Co. Kommanditgesellschaft | Combustion engine having a variable compression ratio |
| CN1295181A (en) * | 2000-12-29 | 2001-05-16 | 天津大学 | Reciprocating piston type internal combustion engine |
| JP2002317663A (en) * | 2001-04-23 | 2002-10-31 | Nippon Soken Inc | Engine with variable compression ratio |
| GB2392475A (en) * | 2002-08-27 | 2004-03-03 | Edward Allen | I.c. engine connecting rod arrangement |
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| Publication number | Publication date |
|---|---|
| CN101016860A (en) | 2007-08-15 |
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Granted publication date: 20091202 Termination date: 20130213 |