CN104500239A - Suspended type compression ratio variable device - Google Patents
Suspended type compression ratio variable device Download PDFInfo
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- CN104500239A CN104500239A CN201410559515.5A CN201410559515A CN104500239A CN 104500239 A CN104500239 A CN 104500239A CN 201410559515 A CN201410559515 A CN 201410559515A CN 104500239 A CN104500239 A CN 104500239A
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Abstract
A suspended type compression ratio variable device belongs to the technical field of internal combustion engines and comprises an air cylinder a cylinder cover, a piston, piston rings, a connecting rod, a volume cavity, hanger plates, springs and a moving body, wherein the volume cavity is arranged in the center of the piston; the first hanger plate and the second hanger plate are both arranged at the top end of the volume cavity; the moving body is arranged in the volume cavity; and the two ends of the moving body are connected with the first hanger plate and the second hanger plate through the first spring and the second spring respectively. Under a high speed working condition, when the highest combustion pressure in a combustion chamber is higher, the moving body moves down, and the volume of the combustion chamber is increased; and under a low speed working condition, when the highest combustion pressure in the combustion chamber is lower, the moving body moves down, and the volume of the combustion chamber is reduced. The suspended type compression ratio variable device is reasonable in structure, simple in design and applicable to the optimization design of the engine compression ratio.
Description
Technical field
The invention belongs to the compression ratio design apparatus of technical field of internal combustion engines, specifically, is a kind of suspension type 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 suspension type 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, first link plate, second link plate, first spring, second spring and moving body, 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 central position of piston, first link plate, second link plate is arranged in the top of cavity volume, moving body is arranged in cavity volume, the two ends of moving body are respectively by the first spring, second spring and the first link plate, second link plate is connected, cavity volume, first link plate, second link plate, the cross section of moving body is rectangular.
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, the 8, first link plate, the 9, second link plate, the 10, first spring, the 11, second spring, 12, moving body.
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 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, cavity volume 7, first link plate 8, second link plate 9, first spring 10, second spring 11 and moving body 12, cavity volume 7 is arranged in the central position of piston 3, first link plate 8, second link plate 9 is arranged in the top of cavity volume 7, moving body 12 is arranged in cavity volume 7, the two ends of moving body 12 are respectively by the first spring 10, second spring 11 and the first link plate 8, second link plate 9 is connected, cavity volume 7, first link plate 8, second link plate 9, the cross section of moving body 12 is rectangular.
In implementation process of the present invention, moving body 12 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 12 moves down and first spring 10 and the second spring 11 that stretch, 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 less, under the stretching action of the first spring 10 and the second spring 11, moving body 12 moves up, then compression ratio becomes large, discharge capacity diminishes, and the combustion efficiency of motor is higher.
Claims (1)
1. a suspension type alterable compression ratio device, comprises 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), and 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), and connecting rod (6) and piston (3) link together, and it is characterized in that, also comprise cavity volume (7), first link plate (8), second link plate (9), first spring (10), second spring (11) and moving body (12), cavity volume (7) is arranged in the central position of piston (3), the first link plate (8), second link plate (9) is arranged in the top of cavity volume (7), and moving body (12) is arranged in cavity volume (7), and the two ends of moving body (12) are respectively by the first spring (10), second spring (11) and the first link plate (8), second link plate (9) is connected, cavity volume (7), first link plate (8), second link plate (9), the cross section of moving body (12) is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559515.5A CN104500239A (en) | 2014-10-20 | 2014-10-20 | Suspended type compression ratio variable device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559515.5A CN104500239A (en) | 2014-10-20 | 2014-10-20 | Suspended type compression ratio variable device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104500239A true CN104500239A (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410559515.5A Pending CN104500239A (en) | 2014-10-20 | 2014-10-20 | Suspended type compression ratio variable device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500239A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996346A (en) * | 2017-01-06 | 2017-08-01 | 中国第汽车股份有限公司 | A kind of automated variable compression ratio engine piston |
-
2014
- 2014-10-20 CN CN201410559515.5A patent/CN104500239A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996346A (en) * | 2017-01-06 | 2017-08-01 | 中国第汽车股份有限公司 | A kind of automated variable compression ratio engine piston |
| CN106996346B (en) * | 2017-01-06 | 2020-09-18 | 中国第一汽车股份有限公司 | Automatic variable compression ratio engine piston |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |
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| WD01 | Invention patent application deemed withdrawn after publication |