CN101936229A - Variable volume compression ratio engine - Google Patents
Variable volume compression ratio engine Download PDFInfo
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- CN101936229A CN101936229A CN 201010235106 CN201010235106A CN101936229A CN 101936229 A CN101936229 A CN 101936229A CN 201010235106 CN201010235106 CN 201010235106 CN 201010235106 A CN201010235106 A CN 201010235106A CN 101936229 A CN101936229 A CN 101936229A
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- compression ratio
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- bent axle
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Abstract
The invention discloses a variable volume compression ratio engine, comprising an ECU, a crankshaft, a connecting rod and a piston and the like, wherein the crankshaft is sheathed by a crankshaft sleeve composed of two crank sleeves and one shaft neck sleeve; one end of the connecting rod is ratably connected with the shaft neck sleeve and the other end is connected with the piston via a piston pin; two crank sleeves of each crankshaft sleeve group are respectively mounted in the operation holes on two operation sleeves; the crankshaft sleeve is controlled by adjusting the operation sleeves via an adjusting mechanism, to move downward or upward along the centerline of the cylinder to change the distance between the main journal and the shaft neck sleeve when the piston is at the upper dead center, thereby changing the compression height when the piston at the upper dead center to realize different compression ratios. In the technical scheme, the compression ratio of the engine can be controlled to satisfy the actual condition optimally according to gas intake, different load operating conditions and the compression ratios required by different fuels, in order to reach optimal fuel economy, dynamic property and discharge effects and realize wide selectivity of fuels of one engine.
Description
Technical field
The present invention relates to the changeable compression ratio technique of motor, can allow to realize different compression ratios by control piston different compression height when the top dead center.
Background technique
Along with the increasingly stringent of Abgasgesetz and the client requirement to the motor Economy, emission performance and the fuel-economy performance of improving motor have been the greatest difficulty that traditional combustion engine faced.Motor changes the main three-way catalyst that adopts of discharging now, improves the fuel-economy performance and mainly adopts in-cylinder direct injection and changeable air valve technology.In order further to reduce discharging, multiple new combustion mode has appearred now.These new combustion modes mainly are to pursue the formation of low-temperature burning and homogeneous charge, promptly require low charge temperature and uniform mixed gas, also have lower compression ratio, to reduce NOX and PM discharging.For the low-temperature burning technology is realized in the full load mode scope, the application of changeable compression ratio technique is necessary.In order to improve the fuel-economy performance and smooth-going power output under various rotating speed load conditions, the application of changeable compression ratio technique also is necessary on the other hand.
The compression ratio of present most of motor is fixed, and the air inlet charge is few when the slow-speed of revolution, and actual compression ratio is lower than the compression ratio of design, can not make atomizing fuel oil and burning.When high rotating speed or turbosupercharger intervention, aeration quantity is greater than the cylinder internal volume in the cylinder, and actual compression ratio is higher than the compression ratio of design, at this moment is easy to generate pinking and burning in advance, has reduced power output and the increasing infringement to motor greatly.Changeable compression ratio technique can change compression ratio according to the change of air inlet charge, fuel oil energy is fully burnt and avoids pinking.Suitable reduction compression ratio when low-load can effectively reduce discharging.
At present commonplace abroad to the research of variable compression ratio engine, but can realize that the achievement of variable compression ratio function is fewer, and complex structure, be difficult for volume production.
Summary of the invention
Technical problem to be solved by this invention provides a kind of variable compression ratio that continuously changes piston different compression heights when top dead center.
The technical solution adopted for the present invention to solve the technical problems is: the variable volume compression ratio engine comprises compositions such as ECU, bent axle, connecting rod and piston.Be set with the bent axle cover on the bent axle, described bent axle cover is made up of two crank covers and a neck bush, one end and the neck bush of connecting rod are rotationally connected, the other end is connected with piston by wrist pin, two crank covers on every suite axle sleeve are installed in two respectively and control controlling in the hole of putting, described two control the cover be installed in the crankcase chute, and fixedly connected with lift device, bent axle and bent axle cover are formed variable compression ratio, axle journal on the described bent axle and crank can slide up and down in the sliding-groove that bent axle puts, and variable compression ratio is to control by the cover of controlling that is installed on the crankcase; Described bent axle is fixed on the crankcase by the overall fixed frame, described overall fixed frame is provided with hydraulic regulator or adjustable diameter and screw adjusting mechanism, regulate lift device by controlling mechanism and control cover, the motion downward or upward of bent axle cover, described controlling between hole and the crank cover can be adopted sliding bearing or rolling bearing.
After taking technique scheme, the present invention drives the bent axle cover by connecting rod, drives crankshaft rotating by the bent axle cover.Regulate by controlling mechanism and to control cover and control the bent axle cover, moving downward or upward along cylinder center line changes the distance of piston main journal and neck bush when the top dead center.Thereby change piston different compression height when top dead center and realize different compression ratios.When reducing compression ratio, main journal and neck bush are apart from shortening during piston top dead center, because neck bush and crank cover are whole, the crank cover is to rotate in controlling the hole, do not rotate with crankshaft center, because the special construction of this variable volume compression ratio engine, when expanding acting, the pressure that effectively does work reduces gradually, and the acting radius but increases gradually, so just make engine torsion equilibrium when top dead center arrives lower dead center, can effectively reduce engine vibration and improve rotatory inertia, the neck bush that piston rod drives is to rotate along controlling the hole, when piston top dead center reduces, stroke of piston does not change, and has so just improved the engine cylinder internal volume.
Beneficial effect of the present invention can reduce following some:
1, reasonable in design being installed on upright motor or the V-type engine simple in structure, and can realize the variable fully of compression ratio.
2, motor down and according to different control of the required compression ratio of various fuel, makes the compression ratio of motor meet present case most according to air inlet charge and various load conditions in the course of the work.Reach the optimum efficiency of fuel economy, power character and discharging.And can make a motor more extensive to the selectivity of fuel.
3 the present invention can realize that miller cycle further improves fuel economy and power character under full operating mode.The special entity of this variable volume compression ratio engine when reducing compression ratio, can effectively reduce engine vibration and improve rotatory inertia, and improve the engine cylinder internal volume.As cooperate turbosupercharger, and will improve the air inlet charge greatly so, it is high-power to become engine design little discharge capacity to realize.Effectively reduce the motor volume, improve power and weight ratio.Reduce complete vehicle quality simultaneously, further save fuel oil.
Description of drawings
This specification comprises following nine width of cloth accompanying drawings:
Fig. 1 is the structural representation of variable volume compression ratio engine of the present invention;
Fig. 2 is that the master of variable volume compression ratio engine bent axle of the present invention looks intention;
Fig. 3 is the side view of variable volume compression ratio engine bent axle of the present invention;
Fig. 4 is the plan view of variable volume compression ratio engine bent axle cover of the present invention;
Fig. 5 is the side view of variable volume compression ratio engine bent axle cover of the present invention;
Fig. 6 is the erection drawing of variable volume compression ratio engine bent axle of the present invention and bent axle cover;
Fig. 7 is the plan view that variable volume compression ratio engine of the present invention is controlled cover;
Fig. 8 is the structural representation of variable volume compression ratio engine hydraulic regulator of the present invention;
Fig. 9 is the structural representation of variable volume compression ratio engine adjustable diameter and screw adjusting of the present invention mechanism;
Component, toponym and pairing mark: ECU1 among the figure, oil hydraulic pump 2, connecting rod 4, piston 5, actuating motor 9, bent axle 10, main journal 11, axle journal 12, crank 13, bent axle cover 20, crank cover 21, neck bush 22, sliding-groove 23, control cover 30, control hole 31, overall fixed frame 40, solenoid valve 41, lift device 42, hydraulic piston 43, upper oil cavitie 45A, lower oil cavitie 45B, turbine nut 47, worm screw 48.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
With reference to Fig. 1, Fig. 7 variable volume compression ratio engine, comprise ECU1, bent axle 10, compositions such as connecting rod 4 and piston 5, be set with bent axle cover 20 on the bent axle 10, described bent axle cover 20 is made up of 21 and neck bushes 22 of two crank covers, one end and the neck bush 22 of connecting rod 4 are rotationally connected, the other end is connected with piston 5 by wrist pin, two crank covers 21 on every suite axle sleeve 20 are installed in two respectively and control controlling in the hole 31 on the cover 30, control cover and 30 be installed in the crankcase chute for described two, and fixedly connected with lift device 42, bent axle 10 is formed variable compression ratio with bent axle cover 20, and variable compression ratio is to control by the cover 30 of controlling that is installed on the crankcase; Described bent axle 10 is fixed on the crankcase by overall fixed frame 40, described overall fixed frame 40 is provided with hydraulic regulator or adjustable diameter and screw adjusting mechanism, regulate lift device 42 by controlling mechanism and control cover 30, bent axle cover 20 motion downward or upward, described controlling between hole 31 and the crank cover 21 can be adopted sliding bearing or rolling bearing.
Be made up of bent axle 10 and bent axle cover 20 with reference to the described variable volume compression ratio of Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 mechanism, crank 13 is sleeved in the sliding-groove 23 with axle journal 12, and an end and the neck bush 22 of connecting rod 4 are rotationally connected.
Can adopt hydraulic regulator or adjustable diameter and screw adjusting mechanism with reference to the described operating-controlling mechanism of figure Fig. 8, Fig. 9; Fluid drive mechanism comprises ECU1, oil hydraulic pump 2, solenoid valve 41, lift device 42, hydraulic piston 43 compositions, the upper end of described lift device 42 is controlled cover and 30 is fixedlyed connected with two, fixedly connected with hydraulic piston 43 in the lower end, described solenoid valve 41 is controlling mechanisms of regulating upper oil cavitie 45A and lower oil cavitie 45B oil mass, described oil hydraulic pump 2 is by crank-driven, and screw-drive mechanism comprises ECU1, lift device 42, turbine nut 47, worm screw 48, actuating motor 9 compositions; The upper end of described lift device 42 is controlled cover and 30 is fixedlyed connected with two, and the lower end screw rod is installed in the turbine nut 47, and described turbine nut 47, worm screw 48 are connected with actuating motor 9.
Variable volume compression ratio engine of the present invention is described further the technical program in conjunction with top fundamental diagram:
Motor is in the high compression ratio state before startup and during the slow-speed of revolution, piston 5 is in the highest top dead center position work, lift device 42 and control cover 30 and be in the extreme higher position.When engine running, increase according to the air inlet charge, give ECU1 by intake flow sensor transmission information, by carrying the information to solenoid valve 41 after the ECU1 processing, the oil pressure that makes solenoid valve 41 regulate upper oil cavitie 45A and lower oil cavitie 45B is regulated hydraulic piston 43 and is driven lift device 42, controls cover 30 and bent axle cover 20 moves down synchronously, reduces compression ratio thereby make piston 5 distance of neck bush 22 and main journal 11 when top dead center shorten the compression height that reduces piston 5.During low load operation,, suitably reduce compression ratio and under full operating mode, be achieved, dischargings such as NOX and PM are reduced by the low-temperature burning technology by above-mentioned working principle.
When motor when reducing air inlet charge or high loaded process, can regulate hydraulic piston 43 by the oil pressure that solenoid valve 41 is regulated upper oil cavitie 45A and lower oil cavitie 45B and drive lift device 42, control cover 30 and bent axle cover 20 moves up synchronously, improve compression ratio thereby make piston 5 distance of neck bush 22 and main journal 11 when top dead center increase the compression height that improves piston 5.The present invention also can use adjustable diameter and screw adjusting mechanism to regulate compression ratio.
This variable volume compression ratio technique scheme can be regulated compression ratio according to the air inlet charge, makes under the various operating modes, and fuel oil can both fully atomize and burn, and improves power output and fuel-economy performance under the various operating modes.
Generator with continuous variable volume compression ratio of the present invention is not subjected to the restriction of engine cylinder number, can be used on the multicylinder engine, and its working principle is the same.
Claims (4)
1. variable volume compression ratio engine, comprise ECU (1), bent axle (10), connecting rod (4) and piston compositions such as (5), it is characterized in that: be set with bent axle cover (20) on the bent axle (10), described bent axle cover (20) is made up of two crank covers (21) and a neck bush (22), one end of connecting rod (4) and neck bush (22) are rotationally connected, the other end is connected with piston (5) by wrist pin, two crank covers (21) on every suite axle sleeve (20) are installed in two respectively and control controlling in the hole (31) on the cover (30), control cover (30) and be installed in the crankcase chute for described two, and fixedly connected with lift device (42), bent axle (10) is formed variable compression ratio with bent axle cover (20), axle journal (12) on the described bent axle (10) can slide up and down in the sliding-groove (23) on the bent axle cover (20) with crank (13), and variable compression ratio is to control by the cover (30) of controlling that is installed on the crankcase; Described bent axle (10) is fixed on the crankcase by overall fixed frame (40), described overall fixed frame (40) is provided with hydraulic regulator or adjustable diameter and screw adjusting mechanism, regulate by controlling mechanism that lift device (42) is controlled cover (30), bent axle cover (20) moves downward or upward, described controlling between hole (31) and the crank cover (21) can be adopted sliding bearing or rolling bearing.
2. variable volume compression ratio engine according to claim 1, it is characterized in that: described variable compression ratio is made up of bent axle (10) and bent axle cover (20), axle journal (12) is sleeved in the sliding-groove (23) with crank (13), and an end of connecting rod (4) and neck bush (22) are rotationally connected.
3. variable volume compression ratio engine as claimed in claim 1 is characterized in that: described overall fixed frame (40), fixedly connected with crankcase by screw mandrel.
4. variable volume compression ratio engine according to claim 1, it is characterized in that: described operating-controlling mechanism can adopt hydraulic regulator or adjustable diameter and screw adjusting mechanism; Fluid drive mechanism comprises ECU (1), oil hydraulic pump (2), solenoid valve (41), lift device (42), hydraulic piston (43) composition, the upper end of described lift device (42) is controlled cover (30) and is fixedlyed connected with two, fixedly connected with hydraulic piston (43) in the lower end, described solenoid valve (41) is a controlling mechanism of regulating upper oil cavitie (45A) and lower oil cavitie (45B) oil mass, described oil hydraulic pump (2) is by crank-driven, and screw-drive mechanism comprises ECU (1), lift device (42), turbine nut (47), worm screw (48), actuating motor (9) composition; The upper end of described lift device (42) is controlled cover (30) and is fixedlyed connected with two, and the lower end screw rod is installed in the turbine nut (47), and described turbine nut (47), worm screw (48) are connected with actuating motor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010235106 CN101936229A (en) | 2010-07-23 | 2010-07-23 | Variable volume compression ratio engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010235106 CN101936229A (en) | 2010-07-23 | 2010-07-23 | Variable volume compression ratio engine |
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|---|---|
| CN101936229A true CN101936229A (en) | 2011-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010235106 Pending CN101936229A (en) | 2010-07-23 | 2010-07-23 | Variable volume compression ratio engine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094716A (en) * | 2011-03-14 | 2011-06-15 | 高伟 | Variable compression ratio engine |
| CN102400794A (en) * | 2011-11-21 | 2012-04-04 | 黄轩弟 | Variable-compression-ratio engine |
| CN105240070A (en) * | 2015-10-13 | 2016-01-13 | 宁波高新区金杉新能源科技有限公司 | Variable displacement timing device for engine and operating manner of variable displacement timing device |
| CN106958550A (en) * | 2017-05-18 | 2017-07-18 | 重庆交通大学 | VCR engine crankshaft connecting rod hydraulic control systems and its control method |
| CN111622836A (en) * | 2020-06-05 | 2020-09-04 | 张家陶 | Engine crankshaft with adjustable radius |
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| CN1782348A (en) * | 1999-12-14 | 2006-06-07 | 贝特·荣松 | Device for adjusting combustion volume and combustion compression of in piston engines |
| JP2007071155A (en) * | 2005-09-08 | 2007-03-22 | Kayseven Co Ltd | Compression ratio variable reciprocating cylinder device |
| CN1940265A (en) * | 2000-09-27 | 2007-04-04 | Rcv发动机有限公司 | Rotating cylinder valve engine |
| CN201027568Y (en) * | 2007-06-06 | 2008-02-27 | 高伟 | Stroke-variable engine crank link mechanism |
| CN101545401A (en) * | 2008-03-28 | 2009-09-30 | 高伟 | Engine crank-connecting rod mechanism with variable expansion stroke |
| DE102008046821A1 (en) * | 2008-09-11 | 2010-04-01 | Audi Ag | Crankshaft for internal combustion engine with variable compression, has crankshaft base body, which has lifting pin with eccentric bush, where distance piece is arranged between pinions |
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2010
- 2010-07-23 CN CN 201010235106 patent/CN101936229A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1782348A (en) * | 1999-12-14 | 2006-06-07 | 贝特·荣松 | Device for adjusting combustion volume and combustion compression of in piston engines |
| CN1940265A (en) * | 2000-09-27 | 2007-04-04 | Rcv发动机有限公司 | Rotating cylinder valve engine |
| JP2007071155A (en) * | 2005-09-08 | 2007-03-22 | Kayseven Co Ltd | Compression ratio variable reciprocating cylinder device |
| CN201027568Y (en) * | 2007-06-06 | 2008-02-27 | 高伟 | Stroke-variable engine crank link mechanism |
| CN101545401A (en) * | 2008-03-28 | 2009-09-30 | 高伟 | Engine crank-connecting rod mechanism with variable expansion stroke |
| DE102008046821A1 (en) * | 2008-09-11 | 2010-04-01 | Audi Ag | Crankshaft for internal combustion engine with variable compression, has crankshaft base body, which has lifting pin with eccentric bush, where distance piece is arranged between pinions |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094716A (en) * | 2011-03-14 | 2011-06-15 | 高伟 | Variable compression ratio engine |
| CN102400794A (en) * | 2011-11-21 | 2012-04-04 | 黄轩弟 | Variable-compression-ratio engine |
| CN105240070A (en) * | 2015-10-13 | 2016-01-13 | 宁波高新区金杉新能源科技有限公司 | Variable displacement timing device for engine and operating manner of variable displacement timing device |
| CN105240070B (en) * | 2015-10-13 | 2018-07-24 | 宁波高新区金杉新能源科技有限公司 | A kind of engine variable discharge capacity advance/retard mechanism and its function mode |
| CN106958550A (en) * | 2017-05-18 | 2017-07-18 | 重庆交通大学 | VCR engine crankshaft connecting rod hydraulic control systems and its control method |
| CN111622836A (en) * | 2020-06-05 | 2020-09-04 | 张家陶 | Engine crankshaft with adjustable radius |
| CN111622836B (en) * | 2020-06-05 | 2021-11-19 | 张家陶 | Engine crankshaft with adjustable radius |
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Application publication date: 20110105 |