CN103790716A - Engine with compression ratio varying device - Google Patents
Engine with compression ratio varying device Download PDFInfo
- Publication number
- CN103790716A CN103790716A CN201210586208.7A CN201210586208A CN103790716A CN 103790716 A CN103790716 A CN 103790716A CN 201210586208 A CN201210586208 A CN 201210586208A CN 103790716 A CN103790716 A CN 103790716A
- Authority
- CN
- China
- Prior art keywords
- compression ratio
- motor
- connecting rod
- control shaft
- ratio device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Transmission Devices (AREA)
Abstract
The present invention discloses an engine with a compression ratio varying device. The engine comprises a crankshaft, a piston, a connection rod for connecting a crank pin of the crankshaft and the piston, and a compression ratio varying device capable of varying the distance between the piston and the crank pin. The compression ratio varying device includes a cover mounted on the outside of the engine, wherein a cover pin portion and a worm gear mounting space are formed in the cover; a control shaft which is contact with the cover pin portion, wherein an operation arm projects from the outer periphery of the control shaft; and a motor portion wherein a worm connected with the motor portion is mounted on the cover, and the worm is engaged with the worm gear to enable the control shaft to rotate according to the motor portion, and wherein the distance between the piston and the crank pin is changed by rotating the control shaft.
Description
The cross reference of related application
The application requires the preference of No. 10-2012-0122088th, the korean patent application of submitting on October 31st, 2012, and the full content of this application is incorporated into this all objects for quoting by this.
Technical field
The present invention relates to a kind of motor with alterable compression ratio device, this motor changes the compression ratio of firing chamber to improve combustion efficiency and to reduce noise/vibration according to the operating conditions of motor.
Background technique
In general, if increase compression ratio, can improve the thermal efficiency of motor, if the ignition timing in ignition-type motor is advanceed to predeterminated level, also can increase the thermal efficiency.
But, if under high compression ratio advance ignition timing, in cylinder, the fuel of improper burning will cause damage to motor, therefore, to being restricted in advance of ignition timing, can be detrimental to like this output power.
Variable compression ratio (VCR) device can change according to the driving situation of motor the compression ratio of the air/fuel mixture in cylinder.
Having in the motor of alterable compression ratio device, increase the compression ratio of air/fuel mixture during in low load condition at motor, to improve the combustion efficiency of fuel, and reduce the compression ratio of air/fuel mixture during in high load condition at motor, to prevent engine knock and to improve the output of motor.
The motor with conventional alterable compression ratio device can change length between piston and the crank pin that piston is connected with bent axle to change compression ratio.
The motor with the alterable compression ratio device of the above-mentioned type comprises Control Shaft, shaft-cup, body cover and control motor, and wherein said control motor makes Control Shaft rotation, and the operating arm being arranged on Control Shaft makes capacity eccentric bearing rotation by bar linkage structure.
, Control Shaft is fixed on engine body with shaft-cup, body cover covers shaft-cup and Control Shaft meanwhile, and therefore, the number of part and weight thereof must increase.In addition, be arranged on an end of body cover as the control motor of actuator, therefore layout volume increases, and the driving torque of control motor cannot be delivered to Control Shaft effectively.
The information that is disclosed in this background of invention technology part is only intended to deepen the understanding to general background technique of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been prior art known in those skilled in the art.
Summary of the invention
A kind of motor with alterable compression ratio device is devoted to provide in various aspect of the present invention, its advantage is to simplify the structure of body cover and shaft-cup, reduce number of parts and weight, reduce the layout volume as the control motor of actuator, and the driving torque of controlling motor is delivered to Control Shaft effectively.
In one aspect of the invention, a kind of motor with alterable compression ratio device can comprise: bent axle, and described bent axle is arranged on engine body in rotatable mode, and crank pin is arranged in described bent axle; Piston, the to-and-fro motion in the cylinder of described engine body of described piston; Connecting rod, described connecting rod links together the described crank pin of described bent axle and described piston; And described alterable compression ratio device, described alterable compression ratio device changes the distance between described piston and described crank pin, wherein said alterable compression ratio device can comprise: body cover, described body cover is arranged on the outside of described engine body, and cover necked part and turbine installing space are formed in described body cover; Control Shaft, the excircle of described Control Shaft contacts with described cover necked part, thereby is supported by described cover necked part in rotatable mode, and wherein turbine is arranged in a side of described Control Shaft, and operating arm is outstanding from the excircle of described Control Shaft; With motor part, described motor part is divided the outside that is arranged on described body cover, wherein be connected to the worm screw of described motor part by being installed on described body cover through described body cover, described worm screw engages with described turbine, to described Control Shaft is rotated according to described motor part, wherein change the distance between described piston and described crank pin by rotating described Control Shaft.
Described alterable compression ratio device can comprise: capacity eccentric bearing, and described capacity eccentric bearing is plugged between described piston and wrist pin, and described wrist pin connects described piston and described connecting rod; And offset connecting rod, described offset connecting rod links together one end of described operating arm and described capacity eccentric bearing.
Described offset connecting rod can comprise: first connecting rod, and one end of described first connecting rod is connected to described one end of described operating arm; And second connecting rod, one end of described second connecting rod is connected to described capacity eccentric bearing, and the other end of described second connecting rod is connected to the other end of described first connecting rod.
Multiple operating arms are formed on described Control Shaft, and spaced in the longitudinal direction one section of intended distance, and described turbine is arranged between described operating arm.
Described Control Shaft is set to parallel with described bent axle, and is arranged between described engine body and described body cover in rotatable mode.
Shaft neck part is being formed on described Control Shaft between described operating arm, and described shaft neck part contacts with the cover necked part forming in described body cover.
Operating arm installing space is formed in described body cover, for receiving described operating arm at described operating arm installing space.
Turbine installing space is formed in described body cover, for receiving described turbine.
Worm screw mounting hole is formed in described body cover, and for receiving described worm screw, and described worm screw mounting hole is communicated with described turbine installing space.
According in the motor with alterable compression ratio device of exemplary of the present invention, independent lid is not set to be fixed on Control Shaft on engine body, body cover is arranged on engine body, by body cover, Control Shaft is arranged on engine body simultaneously, therefore, gross weight and number of parts can reduce, and layout diminishes, and assembling process also can shorten.
In addition, motor part is divided on the core in the outside that is arranged on body cover, and therefore, total arrangement reduces, and the moment of torsion of motor part can be delivered to Control Shaft effectively.
By including accompanying drawing herein in and being used from subsequently the embodiment of explanation some principle of the present invention with accompanying drawing one, the further feature that method and apparatus of the present invention has and advantage will more specifically become clear or be illustrated.
Accompanying drawing explanation
Fig. 1 shows according to the part side view of the motor with alterable compression ratio device of exemplary of the present invention.
Fig. 2 is according to the part perspective view of the motor with alterable compression ratio device of exemplary of the present invention.
Fig. 3 is according to the decomposed perspective view of the motor with alterable compression ratio device of exemplary of the present invention.
Fig. 4 is the side view being illustrated according to the internal surface of the body cover of equipping on the motor of exemplary of the present invention.
Should understand, appended accompanying drawing has not shown the technique of painting of slightly simplifying of the exemplifying various features of basic principle of the present invention pari passu.Specific design feature of the present invention disclosed herein for example comprises that concrete size, direction, position and profile will partly will be applied and the environment of use is determined by concrete.
In these figures, run through several figures of accompanying drawing, reference character is quoted part equally or that be equal to of the present invention.
Embodiment
To each embodiment of the present invention at length be made and being quoted below, the example of these embodiments be shown in the accompanying drawings and be described below.Although the present invention will combine and be described with exemplary, should recognize, this specification is not intended to limit the invention to those exemplary.On the contrary, the present invention is intended to not only cover these exemplary, and covers various selection forms, modification, the equivalent form of value and other embodiment that can be included within the spirit and scope of the present invention that limited by claims.
Hereinafter will describe exemplary of the present invention in detail referring to accompanying drawing.
Fig. 1 shows according to the part side view of the motor with alterable compression ratio device of exemplary of the present invention.
Referring to Fig. 1, the motor with alterable compression ratio device comprises bent axle 120, connecting rod 140, capacity eccentric bearing 170, wrist pin 160, piston 110, Control Shaft 100, operating arm 105, first connecting rod 130 and second connecting rod 150.
The underpart of connecting rod 140 is connected to crank pin 125, and this crank pin is arranged on bent axle 120, and the upper end portion of connecting rod 140 is connected to piston 110 by wrist pin 160.
And capacity eccentric bearing 170 is plugged on wrist pin 160 and is formed between the inner circumference in hole of the upper end of connecting rod 140.That is to say, capacity eccentric bearing 170 is arranged between connecting rod 140 and wrist pin 160 in rotatable mode.
By rotating eccentricity bearing 170, can change the distance between piston 110 and crank pin, thereby change the compression ratio of motor.
Control Shaft 100 arranges abreast with rotatable mode and bent axle 120, and operating arm 105 is outwards outstanding on Control Shaft 100.
An end of first connecting rod 130 is connected to one end of operating arm 105, and an end of second connecting rod 150 is connected to another end of first connecting rod 130.In addition, another end of second connecting rod 150 is connected to capacity eccentric bearing 170.
Herein, operating arm 105 and first connecting rod 130 link together by joint pin, and first connecting rod 130 and second connecting rod 150 also link together by joint pin.And capacity eccentric bearing 170 is fixed on second connecting rod 150, make second connecting rod 150 can make capacity eccentric bearing 170 rotate.
If Control Shaft 100 rotates, operating arm 105 promotes or pulls first connecting rod 130, and second connecting rod 150 makes capacity eccentric bearing 170 in the clockwise direction or counterclockwise upper rotation.
Fig. 2 is according to the part perspective view of the motor with alterable compression ratio device of exemplary of the present invention.
Referring to Fig. 2, motor comprises engine body 200, and it has cylinder, is arranged on the bent axle 120 on cylinder 210 downsides, is arranged on the body cover 220 on engine body 200 sides, and is arranged on the motor part 230 on body cover 220 outsides.Body cover 220 can be arranged on engine body 200.
In exemplary of the present invention, the output torque of motor part 230 is used for making Control Shaft 100 in the clockwise direction or counterclockwise upper rotation.
In addition, Control Shaft 100 is plugged between the internal surface of body cover 220 and the outer surface of engine body 200 in rotatable mode.That is to say, Control Shaft 100 is arranged on engine body 200 in rotatable mode by body cover 220.
Fig. 3 is according to the decomposed perspective view of the motor with alterable compression ratio device of exemplary of the present invention, and Fig. 4 shows according to the side view of the internal surface of the body cover of equipping on motor of exemplary of the present invention.
Referring to Fig. 3 and Fig. 4, the motor with alterable compression ratio device comprises body cover 220, Control Shaft 100, operating arm 105, worm gear 310, worm screw 300 and motor part 230.
In exemplary of the present invention, operating arm installing space 107 is formed on the internal surface of body cover 220, corresponding to operating arm 105.
Cover necked part 400 is by slidingsurface engagement shaft necked part 330, and the cover necked part 400 of body cover 220 is fixed on Control Shaft 100 on engine body 200 in rotatable mode.
In addition, turbine 310 is being formed between operating arm 105 on Control Shaft 100, and worm screw 300 engages with turbine 310.
Can make worm screw 300 rotate by the motor being arranged in motor part 230, worm screw 300 can make to rotate through the Control Shaft 100 of turbine 310.
As mentioned above, the worm screw mounting hole 410 that worm screw inserts is formed in body cover 220, and turbine installing space 420 is formed on body cover 220, corresponding to worm screw mounting hole 410.
As mentioned above, in exemplary of the present invention, independent lid is not set Control Shaft 100 is fixed on engine body 200.
And the body cover 220 being arranged on engine body 200 is arranged on Control Shaft 100 on body cover 220, therefore, gross weight can reduce, and layout is simple, and assembling process also can shorten.
In addition, motor part 230 is arranged on the core in outside of body cover 220, and therefore, total arrangement reduces, and motor part 230 can be delivered to Control Shaft 100 effectively by moment of torsion.
For the ease of making an explanation in appended claims and accurately definition, term " on ", D score, " interior " and " outward " describe the feature of exemplary in the position of feature as shown in the figure in order to reference.
The description above concrete exemplary of the present invention being presented is for the purpose of illustration and description.Description above does not want to become milli exhaustively, neither want the present invention to be restricted to disclosed precise forms, and obviously, be all possible according to a lot of changes of above-mentioned instruction and variation.Selecting exemplary and being described is in order to explain certain principles of the present invention and practical application thereof, thereby makes others skilled in the art can realize and utilize various exemplary of the present invention and different choice form and modification.Scope of the present invention is intended to be limited by appended claims and the equivalent form of value thereof.
Claims (9)
1. a motor with alterable compression ratio device, comprising:
Bent axle, described bent axle is arranged on engine body in rotatable mode, and crank pin is arranged in described bent axle;
Piston, the to-and-fro motion in the cylinder of described engine body of described piston;
Connecting rod, described connecting rod links together the described crank pin of described bent axle and described piston; And
Described alterable compression ratio device, described alterable compression ratio device changes the distance between described piston and described crank pin,
Wherein said alterable compression ratio device comprises:
Body cover, described body cover is arranged on the outside of described engine body, and cover necked part and turbine installing space are formed in described body cover;
Control Shaft, the excircle of described Control Shaft contacts with described cover necked part, thereby is supported by described cover necked part in rotatable mode, and wherein turbine is arranged in a side of described Control Shaft, and operating arm is outstanding from the excircle of described Control Shaft; With
Motor part, described motor part is divided the outside that is arranged on described body cover,
Wherein be connected to the worm screw of described motor part by being installed on described body cover through described body cover, described worm screw engages with described turbine, to described Control Shaft is rotated according to described motor part,
Wherein change the distance between described piston and described crank pin by rotating described Control Shaft.
2. the motor with alterable compression ratio device according to claim 1, wherein said alterable compression ratio device comprises:
Capacity eccentric bearing, described capacity eccentric bearing is plugged between described piston and wrist pin, and described wrist pin connects described piston and described connecting rod; And
Offset connecting rod, described offset connecting rod links together one end of described operating arm and described capacity eccentric bearing.
3. the motor with alterable compression ratio device according to claim 2, wherein said offset connecting rod comprises:
First connecting rod, one end of described first connecting rod is connected to described one end of described operating arm; And
Second connecting rod, one end of described second connecting rod is connected to described capacity eccentric bearing, and the other end of described second connecting rod is connected to the other end of described first connecting rod.
4. the motor with alterable compression ratio device according to claim 2, wherein multiple operating arms are formed on described Control Shaft, and are spaced apart at a predetermined distance from each other in the longitudinal direction, and described turbine is arranged between described operating arm.
5. the motor with alterable compression ratio device according to claim 4, wherein said Control Shaft is set to parallel with described bent axle, and is arranged between described engine body and described body cover in rotatable mode.
6. the motor with alterable compression ratio device according to claim 4, wherein shaft neck part is being formed on described Control Shaft between described operating arm, and described shaft neck part contacts with the described cover necked part forming in described body cover.
7. the motor with alterable compression ratio device according to claim 4, wherein operating arm installing space is formed in described body cover, for receiving described operating arm at described operating arm installing space.
8. the motor with alterable compression ratio device according to claim 4, wherein turbine installing space is formed in described body cover, for receiving described turbine.
9. the motor with alterable compression ratio device according to claim 8, wherein worm screw mounting hole is formed in described body cover, and for receiving described worm screw, and described worm screw mounting hole is communicated with described turbine installing space.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0122088 | 2012-10-31 | ||
| KR1020120122088A KR101886078B1 (en) | 2012-10-31 | 2012-10-31 | Engine that has compression ratio variable device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103790716A true CN103790716A (en) | 2014-05-14 |
Family
ID=50479572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210586208.7A Pending CN103790716A (en) | 2012-10-31 | 2012-12-28 | Engine with compression ratio varying device |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101886078B1 (en) |
| CN (1) | CN103790716A (en) |
| DE (1) | DE102012113138B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11421588B2 (en) | 2020-04-02 | 2022-08-23 | Soon Gil Jang | Variable compression ratio engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6581552B2 (en) * | 2000-05-29 | 2003-06-24 | Meta Motoren-Und Energie-Technik Gmbh | Apparatus for changing the compression of a cylinder of a piston engine |
| CN1950596A (en) * | 2004-03-11 | 2007-04-18 | 维亚内·拉比 | Adjustment device for a variable compression ratio engine |
| CN101680363A (en) * | 2007-06-13 | 2010-03-24 | 丰田自动车株式会社 | Variable compression ratio internal combustion engine |
| CN102465771A (en) * | 2010-11-18 | 2012-05-23 | 现代自动车株式会社 | Variable compression ratio apparatus |
| CN102562354A (en) * | 2010-12-10 | 2012-07-11 | 丰田合成株式会社 | Boot seal for variable compression-rate engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4062867B2 (en) * | 2000-07-31 | 2008-03-19 | 日産自動車株式会社 | Internal combustion engine with variable compression ratio mechanism |
| KR101198786B1 (en) * | 2010-06-30 | 2012-11-07 | 현대자동차주식회사 | Variable compression ratio apparatus |
| KR101258947B1 (en) | 2011-04-28 | 2013-04-29 | 삼성중공업 주식회사 | Vessel with hydrofoils |
-
2012
- 2012-10-31 KR KR1020120122088A patent/KR101886078B1/en active IP Right Grant
- 2012-12-28 DE DE102012113138.4A patent/DE102012113138B4/en not_active Expired - Fee Related
- 2012-12-28 CN CN201210586208.7A patent/CN103790716A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6581552B2 (en) * | 2000-05-29 | 2003-06-24 | Meta Motoren-Und Energie-Technik Gmbh | Apparatus for changing the compression of a cylinder of a piston engine |
| CN1950596A (en) * | 2004-03-11 | 2007-04-18 | 维亚内·拉比 | Adjustment device for a variable compression ratio engine |
| CN101680363A (en) * | 2007-06-13 | 2010-03-24 | 丰田自动车株式会社 | Variable compression ratio internal combustion engine |
| CN102465771A (en) * | 2010-11-18 | 2012-05-23 | 现代自动车株式会社 | Variable compression ratio apparatus |
| CN102562354A (en) * | 2010-12-10 | 2012-07-11 | 丰田合成株式会社 | Boot seal for variable compression-rate engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140056727A (en) | 2014-05-12 |
| DE102012113138A1 (en) | 2014-04-30 |
| KR101886078B1 (en) | 2018-08-08 |
| DE102012113138B4 (en) | 2021-08-26 |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140514 |
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