CN104405502A - Variable engine capacity system of air discharge pressure control type - Google Patents
Variable engine capacity system of air discharge pressure control type Download PDFInfo
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- CN104405502A CN104405502A CN201410549096.7A CN201410549096A CN104405502A CN 104405502 A CN104405502 A CN 104405502A CN 201410549096 A CN201410549096 A CN 201410549096A CN 104405502 A CN104405502 A CN 104405502A
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Abstract
The invention discloses a variable engine capacity system of a discharge pressure control type and belongs to the technical field of internal combustion engines. The system comprises a cylinder cover, a piston, a cylinder, a piston ring, a connecting rod, a first connecting pipe, a volume cavity, movable bodies, a spring and a connecting pipe, wherein the volume cavity is arranged at the top of the piston; the first movable body and the second movable body are both arranged in the volume cavity; the first movable body is arranged at the upper end of the second movable body; the right end face of the second movable body is connected with the right end face of the volume cavity through the spring; and the lower end face of the first movable body and the upper end face of the second movable body are both of slope structures and fit with each other. In a low-speed working condition, the second movable body moves left and the first movable body moves upward when the air discharge pressure of the engine is comparatively low, so that the volume of a combustion chamber is reduced. In a high-speed working condition, the second movable body moves right and the first movable body moves downward when air discharge pressure of the engine is comparatively high, the volume of the combustion chamber is increased. The variable engine capacity system is reasonable in structure, simple in design and is suitable for the design optimization of compression ratio of an engine.
Description
Technical field
The invention belongs to technical field of internal combustion engines, specifically, is a kind of exhaust pressure control type engine displacement variable system.
Background technique
Engine displacement is called for short discharge capacity, is the summation of each cylinder working volume of motor, the product of displacement per cylinder and cylinder number.Cylinder capacity then refers to and is also called displacement per cylinder by the gas volume that piston is inswept from top dead center to lower dead center, and it depends on cylinder diameter and piston stroke.Discharge capacity is the structural parameter of outbalance, it can the size of measured engine comprehensively. and the performance index of motor are closely related with discharge capacity, in general, the discharge capacity of automobile is larger, and power is also higher. and logical conventional unit discharge capacity is as the foundation evaluating different engine size.The summation of each displacement of multicylinder engine, is called engine displacement.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, compression ratio is made to 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 20132087509.9, name is called the patented technology of the combustion chamber of petrol engine that a kind of subregion burns, and proposes the concept of subregion burning, combustion efficiency can be made higher, but its compression ratio and engine displacement are immutable.
Summary of the invention
The present invention is directed to above-mentioned deficiency, provide a kind of exhaust pressure control type engine displacement variable system, the alterable compression ratio of motor.
The present invention is achieved through the following technical solutions, the present invention includes engine air inlet tube, air filter, gas compressor, intercooler, cylinder cap, engine exhaust pipe, catalyst, piston, cylinder, first piston ring, second piston ring, connecting rod, first connecting tube, cavity volume, first moving body, second moving body, spring and the second connecting tube, the air outlet of engine air inlet tube is connected with the intake duct on cylinder cap, air filter, gas compressor, intercooler is arranged on engine air inlet tube successively, and the suction port of engine exhaust pipe is connected with the air outlet flue on cylinder cap, and piston is arranged in cylinder, cylinder cap, cylinder, piston forms firing chamber together, first piston ring, second piston ring is arranged in the top of piston, and connecting rod and piston link together, and cavity volume is arranged in the top of piston, the first moving body, second moving body is arranged in cavity volume, and the first moving body is in the upper end of the second moving body, and the right side of the second moving body is linked together by the right side of spring and cavity volume, the lower end surface of the first moving body, the upper-end surface of the second moving body is ramp structure and the two is combined together, the first moving body, the cross section of the second moving body is rectangular, one end of first connecting tube is connected with the engine exhaust pipe before catalyst, the other end of the first connecting tube is connected with one end of the second connecting tube through after cylinder wall, and the other end of the second connecting tube is connected with the left wall of cavity volume.
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 and discharge capacity are 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, engine air inlet tube, and 2, air filter, 3, gas compressor, 4, intercooler, 5, cylinder cap, 6, engine exhaust pipe, 7, catalyst, 8, piston, 9, cylinder, 10, first piston ring, the 11, second piston ring, 12, connecting rod, 13, the first connecting tube, 14, cavity volume, the 15, first moving body, 16, the second moving body, 17, spring, the 18, second connecting tube.
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 engine air inlet tube 1, air filter 2, gas compressor 3, intercooler 4, cylinder cap 5, engine exhaust pipe 6, catalyst 7, piston 8, cylinder 9, first piston ring 10, second piston ring 11, connecting rod 12, first connecting tube 13, cavity volume 14, first moving body 15, second moving body 16, spring 17 and the second connecting tube 18, the air outlet of engine air inlet tube 1 is connected with the intake duct on cylinder cap 5, air filter 2, gas compressor 3, intercooler 4 is arranged on engine air inlet tube 1 successively, and the suction port of engine exhaust pipe 6 is connected with the air outlet flue on cylinder cap 5, and piston 8 is arranged in cylinder 9, cylinder cap 5, cylinder 9, piston 8 forms firing chamber together, first piston ring 10, second piston ring 11 is arranged in the top of piston 8, and connecting rod 12 and piston 8 link together, and cavity volume 14 is arranged in the top of piston 8, the first moving body 15, second moving body 16 is arranged in cavity volume 14, and the first moving body 15 is in the upper end of the second moving body 16, and the right side of the second moving body 16 is linked together by the right side of spring 17 with cavity volume 14, the lower end surface of the first moving body 15, the upper-end surface of the second moving body 16 is ramp structure and the two is combined together, the first moving body 15, the cross section of the second moving body is rectangular, one end of first connecting tube 13 is connected with the engine exhaust pipe 6 before catalyst 7, the other end of the first connecting tube 13 is connected with one end of the second connecting tube 18 through after cylinder wall, and the other end of the second connecting tube 18 is connected with the left wall of cavity volume 14.
In implementation process of the present invention, the first moving body 15 can move up and down in cavity volume 14, and the second moving body 16 can move left and right in cavity volume 14.When the rotating speed of motor is higher, when the exhaust pressure namely in the second connecting tube 18 is larger, the second moving body 16 moves right and Compress Spring 17, first moving body 15 moves down, then compression ratio diminishes, discharge capacity becomes large, and the knocking tends of motor diminishes; When the rotating speed of motor is lower, when the exhaust pressure namely in the second connecting tube 18 is less, under the effect of spring 17, the second moving body 16 is moved to the left, and the first moving body 15 moves up, then compression ratio becomes large, discharge capacity diminishes, and the combustion efficiency of motor is higher.
Claims (1)
1. an exhaust pressure control type engine displacement variable system, comprises engine air inlet tube (1), air filter (2), gas compressor (3), intercooler (4), cylinder cap (5), engine exhaust pipe (6), catalyst (7), piston (8), cylinder (9), first piston ring (10), second piston ring (11) and connecting rod (12), the air outlet of engine air inlet tube (1) is connected with the intake duct on cylinder cap (5), air filter (2), gas compressor (3), intercooler (4) is arranged on engine air inlet tube (1) successively, the suction port of engine exhaust pipe (6) is connected with the air outlet flue on cylinder cap (5), piston (8) is arranged in cylinder (9), cylinder cap (5), cylinder (9), piston (8) forms firing chamber together, first piston ring (10), second piston ring (11) is arranged in the top of piston (8), and connecting rod (12) and piston (8) link together, and it is characterized in that, also comprise the first connecting tube (13), cavity volume (14), first moving body (15), second moving body (16), spring (17) and the second connecting tube (18), cavity volume (14) is arranged in the top of piston (8), the first moving body (15), second moving body (16) is arranged in cavity volume (14), first moving body (15) is in the upper end of the second moving body (16), the right side of the second moving body (16) is linked together by the right side of spring (17) with cavity volume (14), the lower end surface of the first moving body (15), the upper-end surface of the second moving body (16) is ramp structure and the two is combined together, the first moving body (15), the cross section of the second moving body is rectangular, the engine exhaust pipe (6) that one end of first connecting tube (13) is front with catalyst (7) is connected, the other end of the first connecting tube (13) is connected with one end of the second connecting tube (18) through after cylinder wall, and the other end of the second connecting tube (18) is connected with the left wall of cavity volume (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549096.7A CN104405502A (en) | 2014-10-16 | 2014-10-16 | Variable engine capacity system of air discharge pressure control type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549096.7A CN104405502A (en) | 2014-10-16 | 2014-10-16 | Variable engine capacity system of air discharge pressure control type |
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| Publication Number | Publication Date |
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| CN104405502A true CN104405502A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410549096.7A Pending CN104405502A (en) | 2014-10-16 | 2014-10-16 | Variable engine capacity system of air discharge pressure control type |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604728A (en) * | 2016-01-20 | 2016-05-25 | 吉林大学 | Motor-driven sliding block type compression ratio piston |
| 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 |
| CN113669170A (en) * | 2021-08-10 | 2021-11-19 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
-
2014
- 2014-10-16 CN CN201410549096.7A patent/CN104405502A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604728A (en) * | 2016-01-20 | 2016-05-25 | 吉林大学 | Motor-driven sliding block type compression ratio piston |
| 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 |
| 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 |
| CN113669170A (en) * | 2021-08-10 | 2021-11-19 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
| CN113669170B (en) * | 2021-08-10 | 2023-02-24 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |
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| WD01 | Invention patent application deemed withdrawn after publication |