CN104405519A - Stretching type compression ratio variable device - Google Patents
Stretching type compression ratio variable device Download PDFInfo
- Publication number
- CN104405519A CN104405519A CN201410559514.0A CN201410559514A CN104405519A CN 104405519 A CN104405519 A CN 104405519A CN 201410559514 A CN201410559514 A CN 201410559514A CN 104405519 A CN104405519 A CN 104405519A
- Authority
- CN
- China
- Prior art keywords
- piston
- compression ratio
- moving body
- cylinder
- volume
- 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
Links
- 230000006835 compression Effects 0.000 title claims abstract description 30
- 238000007906 compression Methods 0.000 title claims abstract description 30
- 238000010304 firing Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
Classifications
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- 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
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
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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
- F02F3/26—Pistons having combustion chamber in piston head
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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
- F02F3/28—Other pistons with specially-shaped head
Landscapes
- 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 relates to a stretching type compression ratio variable device, and belongs to the technical field of internal combustion engines. The stretching type compression ratio variable device comprises an air cylinder, a cylinder cover, a piston, a first piton ring, a second piston ring, a connecting rod, a volume cavity, a moving body and a spring, wherein the cylinder cover is arranged at the upper end of the air cylinder; the piston is arranged inside the air cylinder; a combustion chamber is formed by the air cylinder, the cylinder cover and the piston together; the first piston ring and the second piston ring are respectively arranged on the top of the piston; the connecting rod is connected with the piston together; the volume cavity is arranged on the top of the piston; the moving body is arranged inside the volume cavity; the two ends of the spring are respectively connected with the lower end face of the moving body and the lower end face of the volume cavity. Under a high-speed working condition, when the pressure inside the combustion chamber is maximum and the combustion pressure is higher, the moving body moves downwards, and the volume of the combustion chamber becomes larger; under a low-speed working condition, when the pressure inside the combustion chamber is maximum and the combustion pressure is lower, the moving body moves upwards, and the volume of the combustion chamber becomes smaller. The stretching type compression ratio variable device is reasonable in structure and simple in design, and is suitable for the optimal design of the compression ratio of an engine.
Description
Technical field
The invention belongs to the compression ratio design apparatus of technical field of internal combustion engines, specifically, is a kind of drawing alterable compression ratio device.
Background technique
Compression ratio refers to that engine mixed gas body is by the degree compressed, with the ratio of the volume of cylinder (i.e. combustion chamber volume) after the cylinder total volume before compression and compression.At present, overwhelming majority automobile adopts so-called ' Reciprocating engine ', simply, be exactly in cylinder, a piston is had to do straight reciprocating motion again and again, and always circulating endlessly, so the movement travel scope of going round and beginning again at this and having it certain among continual working stroke.With regard to certain cylinder of motor, when the stroke of piston arrives minimum point, location point now is just called lower dead center, it is range volume that whole cylinder comprises the volume that firing chamber formed, when piston reverses direction motion, when arriving peak position, this location point is just called top dead center, the volume formed is the minimum situation of whole piston movement swept volume, and the compression ratio that need calculate is exactly the ratio of this range volume and minimum volume.The object of variable compression ratio is the fuel economy improving supercharged engine.In supercharged engine, in order to prevent pinking, its compression ratio is lower than naturally aspirated engine.When low pressure, the thermal efficiency reduces. and fuel economy is declined.Special in turbosupercharged engine due to supercharging level rise slowly under low compression ratio condition moment of torsion rise also very slow. form so-called turbo lag phenomenon.That is, motor is when low speed, and pressurization is delayed, wait until motor accelerate to certain rotating speed after pressurization system just play a role.In order to address this problem, variable compression ratio is important method.In other words. make compression ratio bring up to identical with naturally aspirated engine compression ratio or exceed at the running on the lower load of low pressure: on the other hand. suitably reduce compression ratio under the high load operating mode in high pressure-charging.In other words, along with the change of load regulates compression ratio continuously. the thermal efficiency can be improved from low-load in high whole condition range.But the compression ratio of available engine is immutable, because combustion chamber volume and displacement are all fixing parameters, reserve in the design.
Through existing literature search, find that number of patent application is 20092014360.5, name is called a kind of patented technology changing the mechanism of engine compression ratio, a kind of mechanism of variable compression ratio is proposed, make combustion efficiency higher, but what its compression ratio change needs were artificial goes to control, and can not regulate by teaching display stand.
Summary of the invention
The present invention is directed to above-mentioned deficiency, provide a kind of drawing alterable compression ratio device, the compression ratio of motor can self-control.
The present invention is achieved through the following technical solutions, the present invention includes cylinder, cylinder cap, piston, first piston ring, second piston ring, connecting rod, cavity volume, moving body and spring, cylinder cap is arranged in the upper end of cylinder, piston is arranged in cylinder, cylinder, cylinder cap, piston forms firing chamber together, first piston ring, second piston ring is arranged in the top of piston, connecting rod and piston link together, cavity volume is arranged in the top of piston, moving body is arranged in cavity volume, the two ends of spring respectively with the lower end surface of moving body, the lower end surface of cavity volume is connected, cavity volume, the cross section of moving body is rectangular, the outer wall of moving body seals with the internal face of cavity volume and contacts.
The invention has the beneficial effects as follows: the present invention is reasonable in design, structure is simple, and under different engine speed, the compression ratio of motor is variable, and the combustion efficiency of each operating mode motor is all higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of A-A section in Fig. 1;
Fig. 3 is the structural representation of B-B section in Fig. 1;
Label in accompanying drawing is respectively: 1, cylinder, and 2, cylinder cap, 3, piston, 4, first piston ring, the 5, second piston ring, 6, connecting rod, 7, cavity volume, 8, moving body, 9, spring.
Embodiment
Elaborate to embodiments of the invention below in conjunction with accompanying drawing, the present embodiment, premised on technical solution of the present invention, give detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
embodiment
Embodiments of the invention as shown in Figure 1, the present invention includes cylinder 1, cylinder cap 2, piston 3, first piston ring 4, second piston ring 5, connecting rod 6, cavity volume 7, moving body 8 and spring 9, cylinder cap 2 is arranged in the upper end of cylinder 1, piston 3 is arranged in cylinder 1, cylinder 1, cylinder cap 2, piston 3 forms firing chamber together, first piston ring 4, second piston ring 5 is arranged in the top of piston 3, connecting rod 6 and piston 3 link together, cavity volume 7 is arranged in the top of piston 3, moving body 8 is arranged in cavity volume 7, the two ends of spring 9 respectively with the lower end surface of moving body 8, the lower end surface of cavity volume 7 is connected, cavity volume 7, the cross section of moving body 8 is rectangular, the outer wall of moving body 8 seals with the internal face of cavity volume 7 and contacts.
In implementation process of the present invention, moving body 8 can move up and down in cavity volume 7.When the rotating speed of motor is higher, when firing chamber maximum combustion pressure is larger, moving body 8 moves down and Compress Spring 9, then engine compression ratio diminishes, discharge capacity becomes large, and the knocking tends of motor diminishes; When the rotating speed of motor is lower, when firing chamber maximum combustion pressure is larger, under the elastic reaction of spring 9, moving body 8 moves up, then compression ratio becomes large, discharge capacity diminishes, and the combustion efficiency of motor is higher.
Claims (1)
1. a drawing alterable compression ratio device, comprise cylinder (1), cylinder cap (2), piston (3), first piston ring (4), second piston ring (5) and connecting rod (6), cylinder cap (2) is arranged in the upper end of cylinder (1), piston (3) is arranged in cylinder (1), cylinder (1), cylinder cap (2), piston (3) forms firing chamber together, first piston ring (4), second piston ring (5) is arranged in the top of piston (3), connecting rod (6) and piston (3) link together, it is characterized in that, also comprise cavity volume (7), moving body (8) and spring (9), cavity volume (7) is arranged in the top of piston (3), moving body (8) is arranged in cavity volume (7), the two ends of spring (9) respectively with the lower end surface of moving body (8), the lower end surface of cavity volume (7) is connected, cavity volume (7), the cross section of moving body (8) is rectangular, the outer wall of moving body (8) seals with the internal face of cavity volume (7) and contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559514.0A CN104405519A (en) | 2014-10-20 | 2014-10-20 | Stretching type compression ratio variable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559514.0A CN104405519A (en) | 2014-10-20 | 2014-10-20 | Stretching type compression ratio variable device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405519A true CN104405519A (en) | 2015-03-11 |
Family
ID=52643173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410559514.0A Pending CN104405519A (en) | 2014-10-20 | 2014-10-20 | Stretching type compression ratio variable device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405519A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840343A (en) * | 2016-05-26 | 2016-08-10 | 江苏源之翼电气有限公司 | Efficient double-piston hot-air engine |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
| WO2020159425A1 (en) * | 2019-02-01 | 2020-08-06 | Hedman Ericsson Patent Ab | Method for providing variable compression ratio in a combustion engine and device for the method |
| RU2795139C2 (en) * | 2019-02-01 | 2023-04-28 | Хедман Эрикссон Патент Аб | Method for providing variable compression in combustion engine and device for implementing the method |
-
2014
- 2014-10-20 CN CN201410559514.0A patent/CN104405519A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840343A (en) * | 2016-05-26 | 2016-08-10 | 江苏源之翼电气有限公司 | Efficient double-piston hot-air engine |
| WO2020159425A1 (en) * | 2019-02-01 | 2020-08-06 | Hedman Ericsson Patent Ab | Method for providing variable compression ratio in a combustion engine and device for the method |
| SE543474C2 (en) * | 2019-02-01 | 2021-03-02 | Hedman Ericsson Patent Ab | Method for producing variable compression ratio in internal combustion engine and device for the method |
| CN113396275A (en) * | 2019-02-01 | 2021-09-14 | 海德曼爱立信专利公司 | Method for providing a variable compression ratio in an internal combustion engine and device for the method |
| US11441493B2 (en) | 2019-02-01 | 2022-09-13 | Hedman Ericsson Patent Ab | Method for providing variable compression ratio in a combustion engine and device for the method |
| RU2795139C2 (en) * | 2019-02-01 | 2023-04-28 | Хедман Эрикссон Патент Аб | Method for providing variable compression in combustion engine and device for implementing the method |
| CN113396275B (en) * | 2019-02-01 | 2023-08-25 | 海德曼爱立信专利公司 | Method for providing variable compression ratio in internal combustion engine and device therefor |
| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |