CN105604728A - Motor-driven sliding block type compression ratio piston - Google Patents
Motor-driven sliding block type compression ratio piston Download PDFInfo
- Publication number
- CN105604728A CN105604728A CN201610034991.4A CN201610034991A CN105604728A CN 105604728 A CN105604728 A CN 105604728A CN 201610034991 A CN201610034991 A CN 201610034991A CN 105604728 A CN105604728 A CN 105604728A
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- CN
- China
- Prior art keywords
- motor
- piston
- compression ratio
- slide block
- lower body
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
-
- 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
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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)
Abstract
The invention discloses a motor-driven sliding block type compression ratio piston. The motor-driven sliding block type compression ratio piston aims at overcoming the defects that in the prior art, there are too many parts, a mechanism is complex, and reliability is poor. The motor-driven sliding block type compression ratio piston comprises an upper piston body, a lower piston body, a motor rotor, a plug pin, compression springs, clamping rings, gaskets, extension springs and motor stators. The piston is divided into the upper piston body and the lower piston body. The motor stators are fixed to a motor seat in the center of the lower piston body. The compression springs are placed in large holes of step holes in a boss of the lower piston body. Sliding blocks are inserted from small holes of the step holes and connected with the compression springs through the clamping rings and the gaskets. The front ends of the sliding blocks are of arc-shaped structures with cross sections in right triangle shapes, and the tail ends of the sliding blocks are of arc-shaped curved face structures. The upper piston body and the lower piston body are connected through the three extension spring on the divided face. The compression ratio of an engine is changed by inserting the sliding blocks into and pulling the sliding blocks out of the clearance between the upper piston body and the lower piston body, the structure is simple, and high reliability is achieved.
Description
Technical field
The invention belongs to engine mechanical equipment, say that more specifically a kind of motor drives slide block type compression ratio piston.
Background technology
The definition of compression ratio is exactly the compressed degree of engine mixed gas body, with recently representing of the volume of cylinder after the cylinder total volume before compression and compression. When the size of compression ratio represents that piston moves to top dead centre by lower dead center, the compressed degree of gas in cylinder.
Compression ratio combustion motor performance has many-sided impact. Compression ratio is higher, and the thermal efficiency is higher, but with the increasing of compression ratio, thermal efficiency increasing degree is more and more less. Compression ratio increases all raises compression pressure, maximum combustion pressure, therefore make combustion engine mechanical decrease in efficiency. The too high easy generation pinking of gasoline engine compression ratio. The too low meeting of diesel engine compression ratio makes compression terminal temperature step-down, affects cold-start performance. Compression specific energy changes the content of harmful components in I. C. engine exhaust. The compression ratio of general engine is immutable, because combustion chamber volume and displacement are all fixing parameters, in design, reserves. But, in order to make Modern Engine can bring into play better efficiency in the operating mode of various variations, designers start to be devoted to study variable compression ratio engine.
Due to the combustion characteristics of gasoline has caused petrolic mixed air pressure can not be too high. If the pressure in cylinder has exceeded critical value, gasoline will be lighted because of compression before igniting, and this phenomenon is called as pinking, can bring very large injury to engine. It is particularly outstanding that this problem seems in the design of engine with supercharger. Fixing compression ratio becomes a very important factor of restriction engine driven supercharging and turbocharged engine. We know, after turbocharging gets involved, the temperature and pressure of combustion chamber can significantly raise, if this value is too high, pinking just unavoidably. This can produce huge injury to engine, also can affect power output simultaneously. So turbocharging and the mechanically-sapercharged engine of fixing compression ratio can only design more much lowerly than common naturally aspirated engine compression ratio. But the design of this too low compression ratio, can cause again engine in the time that turbocharger does not get involved completely, and efficiency of combustion is very low, few many of power that the power that can produce produces than common naturally aspirated engine. This contradiction is to impel designer to develop the major reason of variable compression ratio engine.
In addition, this technology can allow engine aspect fuel oil adaptability, have huge advantage. The compression ratio of now trendy main flow engine generally designs more than 10:1, to obtain better power output and fuel economy. But the engine of high compression ratio need to use the fuel oil compared with high grade, but at home, this requirement can reduce the adaptability of automobile in remote place, and the not high application that makes high compression engine of the quality of domestic fuel oil is restricted. Many vehicles on domestic market are exactly to have affected it because compression ratio is higher in popularization from far-off regions. But high compression ratio design is petrolic designer trends now, too little compression ratio can reduce the performance of engine, if very low by the compression ratio design of engine disagreed with the mainstream development direction of engine again. This contradiction seems particularly evident in China and other developing countries. At this time, the engine of variable compression ratio just seems very valuable.
Just need more complicated structure but control compression ratio, this can increase engine volume to a certain extent on the contrary, and difficulty of processing becomes large simultaneously. In addition, the problems such as wearing and tearing, control accuracy, sealing are all very thorny, and these are hindered changeable compression ratio technique always.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of simple in structure, the motor of reliable operation drives slide block type compression ratio piston.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of motor drives slide block type compression ratio piston, comprises piston upper body, piston lower body, and motor (motor stator and rotor), slide block, Compress Spring, snap ring, pad, extension spring, is characterized in that:
Piston disjunction is piston upper body and two parts of piston lower body, motor stator is fixed on the motor cabinet of piston lower body central authorities, on rotor, be fixedly connected with a cam, Compress Spring is placed in the macropore of horizontal shoulder hole in piston lower body boss, slide block penetrates and Compress Spring is connected with slide block with pad by snap ring in the aperture of shoulder hole, and piston upper body is connected by three extension springs with piston lower body.
The central authorities of described piston lower body are the motor cabinets of shrinkage pool shape, the boss of piston lower body laterally place has shoulder hole, and circular groove has been opened at boss edge, and piston lower body divides the outside of section to have three equally distributed deep holes, open to the outer wall of piston lower body in hole, has cylinder fixed bar in hole.
The front end of described slide block is that cross section is the arc-shaped structure of right angled triangle, and the tail end of latch is arc-shaped surface structure, has the outer groove of a circle for fixing snap ring and pad near tail end.
The cam being fixedly connected with on described rotor, the upper end face of cam contour is the circular arc that radius of curvature is large, the bottom surface of cam contour is the circular arc that radius of curvature is little.
It is leg-of-mutton circular groove that described piston upper body divides section inner side to have six equally distributed cross sections, and piston upper body divides the outside of section to have three equally distributed holes corresponding with piston lower body, has cylinder fixed bar in hole.
Compared with prior art, the invention has the beneficial effects as follows:
1. motor of the present invention drives slide block type compression ratio piston to promote slide block movement by the rotation of cam, and under the effect of Compress Spring return, adaptability is good.
2. motor of the present invention drives slide block type compression ratio piston by mounted motor device in internal piston, and piston is carried out to local processing, good manufacturability.
3. motor of the present invention drives slide block type compression ratio piston to realize change compression ratio object by changing the structure of piston, less to the change of engine entirety, good economy performance.
4. motor of the present invention drives slide block type compression ratio piston to be inserted and extracted out gap between piston upper body and piston lower body by slide block to realize the change of compression ratio, reliable operation.
Brief description of the drawings
Illustrate with example below in conjunction with accompanying drawing.
Accompanying drawing 1 is the main cutaway view that motor of the present invention drives slide block type compression ratio piston
Accompanying drawing 2 is D-D projection views that motor of the present invention drives the master of slide block type compression ratio piston to analyse and observe.
Accompanying drawing 3 is schematic internal view that motor of the present invention drives slide block type compression ratio piston.
Accompanying drawing 4 is front views that motor of the present invention drives the slide block part of slide block type compression ratio piston.
Accompanying drawing 5 is top views that motor of the present invention drives the slide block part of slide block type compression ratio piston.
Accompanying drawing 6 is bottom schematic view that motor of the present invention drives the piston upper body of slide block type compression ratio piston.
Accompanying drawing 7 is slide block assembling schematic diagrames that motor of the present invention drives slide block type compression ratio piston.
In figure: 1. piston upper body, 2. piston lower body, 3. rotor, 4. slide block, 5. Compress Spring, 6. snap ring, 7. pad, 8. extension spring, 9. motor stator.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is explained in detail:
Consult Fig. 1 and Fig. 2, it is piston upper body 1 and piston lower body 2 two parts that motor of the present invention drives the disjunction of slide block type compression ratio piston, the central authorities of piston lower body 2 are motor cabinets of shrinkage pool shape, on motor cabinet, there is buckle for fixed electrical machinery stator 9, in the boss of piston lower body 2, have and be distributed with six uniform shoulder holes for limiting vertically moving of corresponding six slide blocks 4, shoulder hole macropore is tangent with point section, the center of the axis of shoulder hole in cam, boss edge has opened six uniform circular grooves for limiting moving radially of slide block 4, there are three equally distributed holes in the outside of 2 points of sections of piston lower body, open to the outer wall of piston lower body 2 in hole, in hole, there is cylinder fixed bar for connecting extension spring 8.
Consult Fig. 6, it is that leg-of-mutton circular groove is corresponding with six circular grooves that distribute uniformly of boss edge of piston lower body 2 that there are six equally distributed cross sections section inner side, 1 point of piston upper body, the outside of the 1 point of section in piston upper body has three equally distributed holes corresponding with the hole of piston lower body 2, in hole, have cylinder fixed bar for connecting extension spring 8, the central authorities of piston upper body 1 are a large hole.
Consult Fig. 4 and Fig. 5, the front end of slide block 4 is that cross section is the arc-shaped structure of right angled triangle, and the outline of slide block 4 is cylindrical shaft-like thing, and the tail end of slide block 4 is semicircular arc curved surfaces, has the outer groove of a circle for fixing snap ring 6 and pad 7 near tail end.
Consult Fig. 2, the type of motor is stepper motor, drive system is made up of pulse signal transmitter, step actuator and stepper motor three parts, motor is divided into rotor 3 and motor stator 9, on rotor 3, be fixedly connected with cam, the upper end face of cam contour is the circular arc that radius of curvature is large, and the bottom surface of cam contour is the circular arc that radius of curvature is little.
Consult Fig. 2, Fig. 3 and Fig. 7, motor stator 9 is fixed on the motor cabinet of piston lower body 2 central authorities, and fix with buckle, Compress Spring 5 is placed in the macropore of shoulder hole in piston lower body 2 boss, slide block 4 penetrates and Compress Spring 5 is connected with slide block 4 with pad 7 by snap ring 6 in the aperture of shoulder hole, snap ring 6 is stuck in the inner side of slide block 4 grooves, the inner side of pad 7 in slide block 4 grooves, makes the bottom surface place of the cam outline that the circular arc camber structure of slide block 4 tail ends connects in rotor 3 by debugging. Piston upper body 1 is connected by three extension springs 8 of point section part with piston lower body 2.
Consult Fig. 1 and Fig. 2, in the time that engine needs high compression ratio, pulse signal transmitter sends pulse signal, when step actuator receives after pulse signal, it rotates by the direction of setting with regard to Driving Stepping Motor, in the time of electric machine rotation, the bottom surface of the cam contour on rotor 3 by with the contacting of slide block 4 curved surfaces, promoting slide block 4 travels forward, Compress Spring 5 is in compressive state, slide block 4 front end support and open the circular groove of the 1 point of section part in piston upper body, overcome the pulling force of extension spring 8, piston upper body 1 is separated with piston lower body 2, in the time that cam rotation 30-degree angle is spent, now slide block 4 is positioned at the circular arc of the upper end face of cam contour, Compress Spring 5 is in maximum compression place, extension spring 8 is in maximum tension state, slide block 4 inserts between piston upper body 1 and piston lower body 2 completely, the now separation degree maximum of piston upper body 1 and piston lower body 2, engine has high compression ratio.
Consult Fig. 1 and Fig. 2, in the time that engine needs low compression ratio, motor rotates again, the upper end face of the cam contour on rotor 3 contacts with slide block 4 curved surfaces, and Compress Spring 5 is in return state, and the front end of slide block 4 moves backward by the return of Compress Spring 5, when cam rotation is rotated 30-degree angle while spending again, slide block 4 tail ends are got back to the bottom surface place of cam contour, and now piston upper body 1 is close together under the pulling force of extension spring 8 with piston lower body 2, and now engine has low compression ratio.
Claims (5)
1. motor drives a slide block type compression ratio piston, it is characterized in that, described motor drives slide block type to pressContracting comprises piston upper body (1) than piston, piston lower body (2), rotor (3), slide block (4), compressionSpring (5), snap ring (6), pad (7), extension spring (8), motor stator (9); Piston disjunction isPiston upper body (1) and (2) two parts of piston lower body, motor stator (9) is fixed on piston lower body (2)On the motor cabinet of central authorities, be fixedly connected with a cam on rotor (3), Compress Spring (5) is placed on workIn plug lower body (2) boss, in the macropore of horizontal shoulder hole, slide block (4) penetrates also in the aperture of shoulder holeCompress Spring (5) is connected with slide block (4) with pad (7) by snap ring (6), piston upper body (1)Be connected by three extension springs (8) with piston lower body (2).
2. drive slide block type compression ratio piston according to motor claimed in claim 1, it is characterized in that, describedThe central authorities of piston lower body (2) are the motor cabinets of shrinkage pool shape, and the boss of piston lower body (2) laterally place has ladderHole, six equally distributed circular grooves have been opened at boss edge, and the outside of piston lower body (2) point section hasThree equally distributed deep holes, open to the outer wall of piston lower body (2) in hole, has cylinder fixed bar in hole.
3. drive slide block type compression ratio piston according to motor claimed in claim 1, it is characterized in that described cunningThe front end of piece (4) is that cross section is the arc-shaped structure of right angled triangle, and the tail end of latch is arc-shaped surfaceStructure, has the outer groove of a circle for fixing snap ring (6) and pad (7) near tail end.
4. drive slide block type compression ratio piston according to motor claimed in claim 1, it is characterized in that described electricityThe cam being fixedly connected with on machine rotor (3), the upper end face of cam contour is the circular arc that radius of curvature is large, camThe bottom surface of profile is the circular arc that radius of curvature is little.
5. drive slide block type compression ratio piston according to motor claimed in claim 1, it is characterized in that described workInside body (1) point section, having six equally distributed cross sections is beyond the Great Wall leg-of-mutton circular groove, pistonThe outside of upper body (1) point section has three equally distributed holes corresponding with piston lower body (2), in hole, hasCylinder fixed bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610034991.4A CN105604728B (en) | 2016-01-20 | 2016-01-20 | Motor drives slide block type compression ratio piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610034991.4A CN105604728B (en) | 2016-01-20 | 2016-01-20 | Motor drives slide block type compression ratio piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105604728A true CN105604728A (en) | 2016-05-25 |
| CN105604728B CN105604728B (en) | 2017-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610034991.4A Expired - Fee Related CN105604728B (en) | 2016-01-20 | 2016-01-20 | Motor drives slide block type compression ratio piston |
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| Country | Link |
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| CN (1) | CN105604728B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762197A (en) * | 2017-03-16 | 2017-05-31 | 吉林大学 | A kind of built-in rotary actuator formula Ratios piston |
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| DE102008038076A1 (en) * | 2008-08-16 | 2010-02-18 | Daimler Ag | Piston for reciprocating engine e.g. petrol engine, of motor vehicle, has piston pin bearing comprising eccentric element, where axis of piston pin is eccentrically adjustable by rotational adjustment of eccentric element |
| WO2010066980A1 (en) * | 2008-12-11 | 2010-06-17 | Peugeot Citroën Automobiles SA | Internal combustion engine with a variable-geometry combustion chamber |
| JP2013036331A (en) * | 2011-08-03 | 2013-02-21 | Denso Corp | Driving device |
| CN103874837A (en) * | 2011-10-08 | 2014-06-18 | 戴姆勒股份公司 | Piston arrangement for a combustion chamber of an internal combustion engine, having a variable compression ratio |
| CN203822474U (en) * | 2014-03-13 | 2014-09-10 | 范伟俊 | Energy-saving engine with variable compression ratio |
| CN104329182A (en) * | 2014-10-21 | 2015-02-04 | 韦晓晖 | Piston system with penetrating hole in top |
| CN104405502A (en) * | 2014-10-16 | 2015-03-11 | 上海鲁交测控科技有限公司 | Variable engine capacity system of air discharge pressure control type |
| JP2015098857A (en) * | 2013-11-20 | 2015-05-28 | トヨタ自動車株式会社 | Internal combustion engine |
| CN205297759U (en) * | 2016-01-20 | 2016-06-08 | 吉林大学 | Motor drive slider formula compression ratio piston |
-
2016
- 2016-01-20 CN CN201610034991.4A patent/CN105604728B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008038076A1 (en) * | 2008-08-16 | 2010-02-18 | Daimler Ag | Piston for reciprocating engine e.g. petrol engine, of motor vehicle, has piston pin bearing comprising eccentric element, where axis of piston pin is eccentrically adjustable by rotational adjustment of eccentric element |
| WO2010066980A1 (en) * | 2008-12-11 | 2010-06-17 | Peugeot Citroën Automobiles SA | Internal combustion engine with a variable-geometry combustion chamber |
| JP2013036331A (en) * | 2011-08-03 | 2013-02-21 | Denso Corp | Driving device |
| CN103874837A (en) * | 2011-10-08 | 2014-06-18 | 戴姆勒股份公司 | Piston arrangement for a combustion chamber of an internal combustion engine, having a variable compression ratio |
| JP2015098857A (en) * | 2013-11-20 | 2015-05-28 | トヨタ自動車株式会社 | Internal combustion engine |
| CN203822474U (en) * | 2014-03-13 | 2014-09-10 | 范伟俊 | Energy-saving engine with variable compression ratio |
| CN104405502A (en) * | 2014-10-16 | 2015-03-11 | 上海鲁交测控科技有限公司 | Variable engine capacity system of air discharge pressure control type |
| CN104329182A (en) * | 2014-10-21 | 2015-02-04 | 韦晓晖 | Piston system with penetrating hole in top |
| CN205297759U (en) * | 2016-01-20 | 2016-06-08 | 吉林大学 | Motor drive slider formula compression ratio piston |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762197A (en) * | 2017-03-16 | 2017-05-31 | 吉林大学 | A kind of built-in rotary actuator formula Ratios piston |
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| Publication number | Publication date |
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| CN105604728B (en) | 2017-12-26 |
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