CN105604728B - Motor drives slide block type compression ratio piston - Google Patents
Motor drives slide block type compression ratio piston Download PDFInfo
- Publication number
- CN105604728B CN105604728B CN201610034991.4A CN201610034991A CN105604728B CN 105604728 B CN105604728 B CN 105604728B CN 201610034991 A CN201610034991 A CN 201610034991A CN 105604728 B CN105604728 B CN 105604728B
- Authority
- CN
- China
- Prior art keywords
- piston
- lower body
- compression ratio
- motor
- sliding block
- 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.)
- Expired - Fee Related
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Classifications
-
- 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 kind of motor to drive slide block type compression ratio piston, it is intended to overcome prior art the characteristics of machine components are more, and mechanism is complicated, poor reliability to be present, motor driving slide block type compression ratio piston includes piston upper body, piston lower body, rotor, latch, compression spring, snap ring, pad, extension spring and motor stator；Piston disjunction is piston upper body and piston lower body, motor stator is fixed on the motor cabinet in piston lower body center, compression spring is placed in piston lower body boss in the macropore of shoulder hole, sliding block inserts out of shoulder hole aperture and compression spring is connected with sliding block with pad by snap ring, the front end of sliding block is the arc-shaped structure that cross section is right angled triangle, the tail end of sliding block is arc-shaped surface structure, and piston upper body is with piston lower body by dividing three extension springs of section part to be connected.The present invention is inserted and extracted out the gap between piston upper body and piston lower body by sliding block to change engine compression ratio, simple in construction, highly reliable.
Description
Technical field
The invention belongs to engine plant equipment, is in particular a kind of motor driving slide block type compression ratio piston.
Background technology
The definition of compression ratio is exactly the degree that engine mixed gas body is compressed, with the cylinder total volume before compression and compression
The ratio between volume of cylinder afterwards represents.When the size of compression ratio represents that piston moves to top dead centre by lower dead center, the gas in cylinder
The degree that body is compressed.
Compression ratio has many influences on engine performance.Compression ratio is higher, and the thermal efficiency is higher, but with the increasing of compression ratio
Height, thermal efficiency increasing degree are less and less.Compression ratio, which increases, makes compression pressure, maximum combustion pressure raise, therefore makes internal combustion engine
Mechanical efficiency declines.Gasoline engine compression ratio is too high easily to produce pinking.Diesel engine compression ratio is too low to become compression terminal temperature
It is low, influence cold-start performance.Compression ratio can make the content of harmful components in I. C. engine exhaust change.The pressure of general engine
Contracting, because combustion chamber volume and displacement are all fixed parameters, has been set in the design than being immutable.
But, in order that obtain modern engine function plays more preferable efficiency in the operating mode of various change, designers start to be directed to
Study variable compression ratio engine.
The mixing atmospheric pressure that petrol engine is result in due to the combustion characteristics of gasoline can not be too high.If the pressure in cylinder
Power has exceeded critical value, and gasoline will be ignited before ignition because of compression, and this phenomenon is referred to as pinking, can be to starting
Machine brings very big injury.This problem seems especially prominent in the design of engine with supercharger.Fixed compression ratio turns into system
An about critically important factor of engine driven supercharging and turbocharged engine.It is known that after turbocharging intervention, burning
The temperature and pressure of room can be raised significantly, if this value is too high, pinking is with regard to inevitable.This can produce huge to engine
Injury, while can also influence power output.So the turbocharging of fixed compression ratio and mechanically-sapercharged engine can only be compressions
It is more much lower than common naturally aspirated engine than being designed to.But this too low compression ratio design, engine can be caused to exist again
When turbocharger does not completely intervene, efficiency of combustion is very low, and power caused by energy is than common naturally aspirated engine institute
Caused power is much less.This contradiction is the major reason for promoting designer to develop variable compression ratio engine.
In addition, this technology can allow engine to possess big advantage in terms of fuel oil adaptability.Now trendy master
The compression ratio common design of engine is flowed 10:More than 1, to obtain more preferable power output and fuel economy.But high pressure
The engine of contracting ratio needs to use the fuel oil compared with high grade, but at home, this requirement can reduce automobile in remote sites
Adaptability, and the not high application for causing high compression engine of the quality of domestic fuel oil is restricted.On domestic market
Many vehicles be exactly because compression ratio is higher and have impact on its remote districts popularization.But high compression ratio design is existing
In a designer trends of petrol engine, too small compression ratio can reduce the performance of engine, if the compression by engine
It is very lower than design, and disagreed with the mainstream development direction of engine.This contradiction shows in China and other developing countries
Obtain particularly evident.At this time, the engine of variable compression ratio just seems very valuable.
But to control compression ratio just to need more complicated structure, this can increase engine block on the contrary to a certain extent
Product, while difficulty of processing becomes big.In addition, all it is very intractable the problems such as abrasion, control accuracy, sealing, these make
Changeable compression ratio technique is obtained to be constantly subjected to hinder.
The content of the invention
It is an object of the present invention to overcome the above mentioned deficiencies, provide a kind of simple in construction, the motor driving cunning of reliable operation
Block formula compression ratio piston.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of motor drives slide block type compression ratio piston, including piston upper body, piston lower body, motor (motor stator and electricity
Machine rotor), sliding block, compression spring, snap ring, pad, extension spring, it is characterised in that：
Piston disjunction is piston upper body and two parts of piston lower body, and motor stator is fixed on the motor in piston lower body center
A cam is fixedly connected with seat, on rotor, compression spring is placed in piston lower body boss in the macropore in laterally-graded hole,
Sliding block penetrates out of shoulder hole aperture and compression spring is connected with sliding block with pad by snap ring, piston upper body and piston
Lower body is connected by three extension springs.
The center of described piston lower body is the motor cabinet of shrinkage pool shape, has shoulder hole at the boss transverse direction of piston lower body, convex
Edge of table has opened circular groove, has three equally distributed deep holes on the outside of piston lower body disjunction face, hole is opened to piston
The outer wall of body, there is cylinder fix bar in hole.
The front end of described sliding block is the arc-shaped structure that cross section is right angled triangle, and the tail end of latch is circular arc song
Face structure, there is a circle external groove to be used for fixing clasp and pad close to tail end.
The cam being fixedly connected on described rotor, the upper top surface of cam contour is the big circular arc of radius of curvature, convex
The bottom surface for taking turns profile is the small circular arc of radius of curvature.
There is the circular groove that six equally distributed cross sections are triangle on the inside of described piston upper body disjunction face, it is living
There are three equally distributed holes corresponding with piston lower body on the outside of body disjunction face beyond the Great Wall, there is cylinder fix bar in hole.
Compared with prior art, the beneficial effects of the invention are as follows：
1. motor driving rotation forces slide block movement of the slide block type compression ratio piston by cam of the present invention, and
Return in the presence of compression spring, adaptability are good.
2. motor of the present invention drives slide block type compression ratio piston by installing electric machine in internal piston, right
Piston carries out local processing, good manufacturability.
3. motor driving slide block type compression ratio piston of the present invention changes pressure by changing the structure of piston to realize
Contracting integrally changes smaller, good economy performance to engine than purpose.
4. motor driving slide block type compression ratio piston of the present invention is inserted with extracting piston upper body and work out by sliding block
The gap between lower body is filled in realize the change of compression ratio, reliable operation.
Brief description of the drawings
Illustrated below in conjunction with accompanying drawing with example.
Accompanying drawing 1 is the main sectional view of motor driving slide block type compression ratio piston of the present invention
Accompanying drawing 2 is the D-D projection views of the main section view of motor driving slide block type compression ratio piston of the present invention.
Accompanying drawing 3 is the schematic internal view of motor driving slide block type compression ratio piston of the present invention.
Accompanying drawing 4 is the front view of the sliding block part of motor driving slide block type compression ratio piston of the present invention.
Accompanying drawing 5 is the top view of the sliding block part of motor driving slide block type compression ratio piston of the present invention.
Accompanying drawing 6 is the bottom schematic view of the piston upper body of motor driving slide block type compression ratio piston of the present invention.
Accompanying drawing 7 is the sliding block assembling schematic diagram of motor driving slide block type compression ratio piston of the present invention.
In figure：1. piston upper body, 2. piston lower bodies, 3. rotors, 4. sliding blocks, 5. compression springs, 6. snap rings, 7. pads
Piece, 8. extension springs, 9. motor stators.
Embodiment
The present invention is explained in detail below in conjunction with the accompanying drawings：
Refering to Fig. 1 and Fig. 2, motor driving slide block type compression ratio piston disjunction of the present invention is piston upper body 1 with living
The two parts of lower body 2 are filled in, the center of piston lower body 2 is the motor cabinet of shrinkage pool shape, has buckle to be used to fix motor stator on motor cabinet
9, six uniform shoulder holes are distributed in the boss of piston lower body 2 and are used to limit vertically moving for corresponding six sliding blocks 4, rank
Terraced hole macropore and disjunction face are tangent, and the axis of shoulder hole is in the center of cam, and six uniform circular arcs have been opened in boss edge
Connected in star is used to limit moving radially for sliding block 4, there is three equally distributed holes, Kong Kaitou on the outside of the disjunction face of piston lower body 2
To the outer wall of piston lower body 2, there is cylinder fix bar to be used to connect extension spring 8 in hole.
Refering to Fig. 6, there is the circular groove that six equally distributed cross sections are triangle on the inside of the disjunction face of piston upper body 1
It is corresponding with the circular groove being uniformly distributed of boss edge six of piston lower body 2, the outside in the disjunction face of piston upper body 1
There are three equally distributed holes corresponding with the hole of piston lower body 2, there is cylinder fix bar to be used to connect extension spring 8 in hole, it is living
The center of body 1 is a big hole beyond the Great Wall.
Refering to Fig. 4 and Fig. 5, the front end of sliding block 4 is the arc-shaped structure that cross section is right angled triangle, the foreign steamer of sliding block 4
Exterior feature is cylindrical shaft, and the tail end of sliding block 4 is semicircular arc curved surface, has a circle external groove to be used for fixing clasp 6 close to tail end
With pad 7.
Refering to Fig. 2, the type of motor is stepper motor, and drive system is by pulse signal transmitter, step actuator and step
Stepper motor three parts form, and motor is divided into rotor 3 and motor stator 9, cam, cam are fixedly connected with rotor 3
The upper top surface of profile is the big circular arc of radius of curvature, and the bottom surface of cam contour is the small circular arc of radius of curvature.
Refering to Fig. 2, Fig. 3 and Fig. 7, motor stator 9 is fixed on the motor cabinet in the center of piston lower body 2, and is fixed with buckle,
Compression spring 5 is placed in the boss of piston lower body 2 in the macropore of shoulder hole, and sliding block 4 penetrates out of shoulder hole aperture and passes through card
Compression spring 5 is connected by ring 6 with pad 7 with sliding block 4, and snap ring 6 is stuck in the inner side of the groove of sliding block 4, and it is recessed that pad 7 is in sliding block 4
The inner side of groove, the circular arc camber structure by debugging the tail end of sliding block 4 are under the cam outline that rotor 3 connects
At bottom surface.Piston upper body 1 is with piston lower body 2 by dividing three extension springs 8 of section part to be connected.
Refering to Fig. 1 and Fig. 2, when engine needs high compression ratio, pulse signal transmitter sends pulse signal, works as stepping
After driver receives pulse signal, it is rotated with regard to Driving Stepping Motor by the direction of setting, when motor rotates, rotor
The bottom surface of cam contour on 3 promotes sliding block 4 to travel forward, compression spring 5 is in pressure by the contact with the curved surface of sliding block 4
Contracting state, the front end of sliding block 4, which is supported, opens the circular groove that section part is divided in piston upper body 1, overcomes the pulling force of extension spring 8, makes
Obtain piston upper body 1 to separate with piston lower body 2, when cam rotation 30-degree angle is spent, now sliding block 4 is located at the upper top of cam contour
In the circular arc in face, compression spring 5 is at maximum compression, and extension spring 8 is in maximum tension state, 4 fully-inserted work of sliding block
Beyond the Great Wall between body 1 and piston lower body 2, now piston upper body 1 and the separation degree of piston lower body 2 are maximum, and engine has high compression
Than.
Refering to Fig. 1 and Fig. 2, when engine needs low compression ratio, motor rotates again, the cam wheel on rotor 3
Wide upper top surface contact with the curved surface of sliding block 4, compression spring 5 are in return state, and the front end of sliding block 4 passes through compression spring 5
Return is moved backward, and when cam rotation rotates 30-degree angle again spends, the tail end of sliding block 4 is returned at the bottom surface of cam contour,
Now piston upper body 1 is close together with piston lower body 2 under the pulling force of extension spring 8, and now engine has low compression ratio.
Claims (5)
1. a kind of motor drives slide block type compression ratio piston, it is characterised in that described motor driving slide block type compression ratio piston
Including piston upper body (1), piston lower body (2), rotor (3), sliding block (4), compression spring (5), snap ring (6), pad (7),
Extension spring (8), motor stator (9)；Piston disjunction is piston upper body (1) and (2) two parts of piston lower body, motor stator
(9) it is fixed on the motor cabinet in piston lower body (2) center, a cam, compression spring (5) is fixedly connected with rotor (3)
It is placed in piston lower body (2) boss in the macropore in laterally-graded hole, sliding block (4) penetrates out of shoulder hole aperture and passes through snap ring
(6) compression spring (5) is connected with sliding block (4) with pad (7), piston upper body (1) passes through three stretchings with piston lower body (2)
Spring (8) is connected.
2. drive slide block type compression ratio piston according to the motor described in claim 1, it is characterised in that described piston lower body
(2) center is the motor cabinet of shrinkage pool shape, there is shoulder hole at the boss transverse direction of piston lower body (2), and boss edge has opened six
The circular groove of even distribution, there are three equally distributed deep holes on the outside of piston lower body (2) disjunction face, hole is opened to piston
The outer wall of body (2), there is cylinder fix bar in hole.
3. drive slide block type compression ratio piston according to the motor described in claim 1, it is characterised in that before described sliding block (4)
Hold as the arc-shaped structure that cross section is right angled triangle, the tail end of latch is arc-shaped surface structure, has a circle close to tail end
External groove is used for fixing clasp (6) and pad (7).
4. drive slide block type compression ratio piston according to the motor described in claim 1, it is characterised in that described rotor (3)
On the cam that is fixedly connected, the upper top surface of cam contour is the big circular arc of radius of curvature, and the bottom surface of cam contour is curvature half
The small circular arc in footpath.
5. drive slide block type compression ratio piston according to the motor described in claim 1, it is characterised in that described piston upper body (1)
There are the circular groove that six equally distributed cross sections are triangle, the outside in piston upper body (1) disjunction face on the inside of disjunction face
There are three equally distributed holes corresponding with piston lower body (2), there is cylinder fix bar in hole.
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 CN105604728A (en) | 2016-05-25 |
| CN105604728B true CN105604728B (en) | 2017-12-26 |
Family
ID=55984972
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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105604728B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762197B (en) * | 2017-03-16 | 2023-03-24 | 吉林大学 | Built-in swing hydraulic motor type variable compression ratio piston |
Family Cites Families (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 |
| FR2939844B1 (en) * | 2008-12-11 | 2010-12-24 | Peugeot Citroen Automobiles Sa | INTERNAL COMBUSTION ENGINE WITH VARIABLE GEOMETRY COMBUSTION CHAMBER. |
| JP2013036331A (en) * | 2011-08-03 | 2013-02-21 | Denso Corp | Driving device |
| DE102011115417A1 (en) * | 2011-10-08 | 2013-04-11 | Daimler Ag | Piston arrangement for a variable compression ratio having combustion chamber of an internal combustion engine |
| 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 |
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2016
- 2016-01-20 CN CN201610034991.4A patent/CN105604728B/en not_active Expired - Fee Related
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| CN105604728A (en) | 2016-05-25 |
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Granted publication date: 20171226 Termination date: 20190120 |