CN102808670A - Air intake/exhaust valve lift-variable system in air intake pressure regulating type - Google Patents
Air intake/exhaust valve lift-variable system in air intake pressure regulating type Download PDFInfo
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- CN102808670A CN102808670A CN2012103162780A CN201210316278A CN102808670A CN 102808670 A CN102808670 A CN 102808670A CN 2012103162780 A CN2012103162780 A CN 2012103162780A CN 201210316278 A CN201210316278 A CN 201210316278A CN 102808670 A CN102808670 A CN 102808670A
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Abstract
The invention discloses an air intake/exhaust valve lift-variable system in an air intake pressure regulating type, belonging to the technical field of internal combustion engines. The system comprises an air intake channel, an air exhaust channel, an air intake valve lower section, an air exhaust valve, an air intake valve upper section, a capacity cavity, a movable body, a perforation pipe, a movable block, an air inlet pipe, a connecting pipe and a spring, wherein the movable body is mounted in the capacity cavity and is contacted with the inner wall face of the capacity cavity in a sealing manner; the perforation pipe perforates the upper wall face and the lower wall face of the movable body; the movable block is mounted in the perforation pipe and is contacted with the inner wall face of the perforation pipe in a sealing manner; the lower end face of the movable block is a plane; the upper end face of the movable block is an inclined face; the air intake valve upper section passes through the upper wall face of the capacity cavity and is extended into the perforation pipe; the lower end face of the air intake door upper section is contacted with the upper end face of the movable block in a sealing manner; when pressure in the air intake pipe is relatively large, the movable body is moved to right; the air intake valve lift is increased; when the pressure in the air intake pipe is relatively small, the movable body is moved to left; the air intake valve lift is reduced; and the intake/exhaust valve variable-lift system is characterized by reasonable design and simple structure and is suitable for engine valve lift-variable systems.
Description
Technical field
What the present invention relates to is a kind of engine intake and exhaust system of technical field of internal combustion engines, particularly a kind of suction pressure regulating type intake and exhaust variable valve lift system.
Background technique
Traditional petrolic valve lift is fixing immutable, and just the cam profile of camshaft has only a kind ofly, and this has just caused this lift can not make motor all obtain good response in high velocity and low velocity zone.The valve lift of conventional gasoline machine motor is that the cam profile design is that the balance of motor under full operating mode selected; Consequently motor both can not get best high speed efficient; Also can not get best low speed torque, but obtained best balanced performance under the full operating mode.The employing of lift range variable makes motor can both be met the valve lift of demand in high velocity and low velocity zone, thereby improves high engine speeds power and low speed torque.
Retrieval through to the existing technology document is found; Chinese patent application number 200910190522.1; Patent name: a kind of hydraulic valve mechanism of lift range variable, this patented technology provides a kind of device of variable valve lift, can take into account the high and low rotating speed operating mode of motor preferably.But its design is the hydraulic mechanism that utilizes, and very high to sealing requirements, poorly sealed words cause fluid seepage easily; And because there is certain compressibility in liquid, the speed of response that valve lift changes has certain retardance.
Summary of the invention
The present invention is directed to the deficiency of above-mentioned existing technology, a kind of suction pressure regulating type intake and exhaust variable valve lift system is provided, the speed of response that valve lift is changed is very fast.
The present invention realizes through following technological scheme; The present invention includes: cylinder, piston, cylinder head, intake duct, air outlet flue, intake valve hypomere, exhaust valve hypomere, intake valve epimere, exhaust valve epimere, cavity volume, moving body, first run through pipe, first moving block, second runs through pipe, second moving block, suction tude, connecting tube and spring; Piston is installed in the space that cylinder surrounds and with the internal face sealing of cylinder and contacts; The air outlet of intake duct, the suction port of air outlet flue all are connected with cylinder head; The lower end surface of the lower end surface of intake valve hypomere, exhaust valve hypomere is all in the firing chamber; Moving body is installed in the cavity volume and with the internal face sealing of cavity volume and contact, and first runs through pipe, second runs through two walls up and down that Guan Jun runs through moving body, first moving block be installed in first run through pipe interior and with first run through pipe internal face seal and contact; Second moving block be installed in second run through in the pipe and with second run through pipe internal face sealing contact; The lower end surface of the lower end surface of first moving block, second moving block is the plane, and the upper-end surface of the upper-end surface of first moving block, second moving block is the inclined-plane, and the intake valve epimere passes the upper wall surface of cavity volume and stretches into first and runs through in the pipe; The lower end surface of intake valve epimere contacts with the upper-end surface sealing of first moving block; The intake valve hypomere passes the lower wall surface of cavity volume and stretches into first and runs through in the pipe, and the upper-end surface of intake valve hypomere contacts with the lower end surface sealing of first moving block, and the exhaust valve epimere passes the upper wall surface of cavity volume and stretches into second and runs through in the pipe; The lower end surface of exhaust valve epimere contacts with the upper-end surface sealing of second moving block; The exhaust valve hypomere passes the lower wall surface of cavity volume and stretches into second and runs through in the pipe, and the upper-end surface of exhaust valve hypomere contacts with the lower end surface sealing of second moving block, and the air outlet of suction tude is connected with the suction port of intake duct; The two ends of connecting tube are connected with the left wall of suction tude, cavity volume respectively, and the right wall of moving body is connected with the right wall of cavity volume through spring.
Further, the cross section of said cavity volume is a rectangular in the present invention, and said first runs through pipe, second runs through pipe and be the uniform section pipe.
In the present invention, moving body, first moving block and second moving block all can be in cavity volume move left and right, first moving block, second moving block can follow in running through pipe also that hypomere moves up and down together on the inlet and exhaust valve.When the suction tude internal pressure is low; Moving body is moved to the left under the elastic reaction of spring, and first moving block, second moving block also are moved to the left simultaneously, the upper-end surface slide relative of the lower end surface of intake valve epimere and first moving block; The intake valve hypomere moves up under the effect of holddown spring; The upper-end surface slide relative of the lower end surface of exhaust valve epimere and second moving block, the exhaust valve hypomere moves up under the effect of holddown spring, thereby the inlet and exhaust valve lift is diminished.When the suction tude internal pressure is higher; Moving body moves right and pressure spring, and first moving block, second moving block also move right simultaneously, the upper-end surface slide relative of the lower end surface of intake valve epimere and first moving block; The intake valve hypomere moves down under the effect of holddown spring; The upper-end surface slide relative of the lower end surface of exhaust valve epimere and second moving block, the exhaust valve hypomere moves down under the effect of holddown spring, thereby makes the inlet and exhaust valve lift become big.
Compared with prior art, the present invention has following beneficial effect and is: the present invention is reasonable in design, and is simple in structure, can realize the continuous variable of valve lift, and the speed of response that valve lift is changed is very fast, and does not need special control mechanism.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of A-A section among Fig. 1;
Wherein: 1, cylinder, 2, piston, 3, cylinder head, 4, intake duct, 5, air outlet flue; 6, intake valve hypomere, 7, the exhaust valve hypomere, 8, the intake valve epimere, 9, the exhaust valve epimere, 10, cavity volume; 11, moving body, 12, first runs through pipe, 13, first moving block, 14, second runs through pipe; 15, second moving block, 16, suction tude, 17, connecting tube, 18, spring.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, present embodiment is a prerequisite with technological scheme of the present invention, provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As depicted in figs. 1 and 2; The present invention includes: comprise that drawing together cylinder 1, piston 2, cylinder head 3, intake duct 4, air outlet flue 5, intake valve hypomere 6, exhaust valve hypomere 7, intake valve epimere 8, exhaust valve epimere 9, cavity volume 10, moving body 11, first runs through pipe 12, first moving block 13, second and run through pipe 14, second moving block 15, suction tude 16, connecting tube 17 and spring 18; Piston 2 is installed in the space that cylinder 1 surrounded and with the internal face sealing of cylinder 1 and contacts; The suction port of the air outlet of intake duct 4, air outlet flue 5 all is connected with cylinder head; The lower end surface of the lower end surface of intake valve hypomere 6, exhaust valve hypomere 7 is all in the firing chamber; Moving body 11 is installed in the cavity volume 10 and with the internal face sealing of cavity volume 10 and contacts; First runs through pipe 12, second runs through two walls up and down that pipe 14 all runs through moving body 11; First moving block 13 is installed in first to be run through in the pipe 12 and runs through the sealing of pipe 12 internal face and contact with first, second moving block 15 be installed in second run through in the pipe 14 and with second run through pipe 14 internal face seal and contact, the lower end surface of the lower end surface of first moving block 13, second moving block 15 is the plane; The upper-end surface of the upper-end surface of first moving block 13, second moving block 15 is the inclined-plane; Intake valve epimere 8 passes the upper wall surface of cavity volume 10 and stretches into first and runs through in the pipe 12, and the lower end surface of intake valve epimere 8 contacts with the upper-end surface sealing of first moving block 13, and intake valve hypomere 6 passes the lower wall surface of cavity volume 10 and stretches into first and runs through in the pipe 12; The upper-end surface of intake valve hypomere 6 contacts with the lower end surface sealing of first moving block 13; Exhaust valve epimere 9 passes the upper wall surface of cavity volume 10 and stretches into second and runs through in the pipe 14, and the lower end surface of exhaust valve epimere 9 contacts with the upper-end surface sealing of second moving block 15, and exhaust valve hypomere 7 passes the lower wall surface of cavity volume 10 and stretches into second and runs through in the pipe 14; The upper-end surface of exhaust valve hypomere 7 contacts with the lower end surface sealing of second moving block 15; The air outlet of suction tude 16 is connected with the suction port of intake duct 4, and the two ends of connecting tube 17 are connected with the left wall of suction tude 16, cavity volume 10 respectively, and the right wall of moving body 11 is connected with the right wall of cavity volume 10 through spring 18; The cross section of cavity volume 10 is a rectangular, and first runs through pipe 12, second runs through pipe and 14 be the uniform section pipe.
In the present invention, moving body 11, first moving block 13 and second moving block 15 all can be in cavity volume 10 move left and right, first moving block 13, second moving block 15 can follow in running through pipe also that hypomere moves up and down together on the inlet and exhaust valve.When suction tude 16 internal pressures are low; Moving body 11 is moved to the left under the elastic reaction of spring 18; First moving block 13, second moving block 15 also are moved to the left simultaneously; The upper-end surface slide relative of the lower end surface of intake valve epimere 8 and first moving block 13, intake valve hypomere 6 moves up under the effect of holddown spring, the upper-end surface slide relative of the lower end surface of exhaust valve epimere 9 and second moving block 15; Exhaust valve hypomere 7 moves up under the effect of holddown spring, thereby the inlet and exhaust valve lift is diminished.When suction tude 16 internal pressures are higher; Moving body 11 moves right and pressure spring 18, the first moving blocks 13, second moving block 15 also move right the upper-end surface slide relative of the lower end surface of intake valve epimere 8 and first moving block 13 simultaneously; Intake valve hypomere 6 moves down under the effect of holddown spring; The upper-end surface slide relative of the lower end surface of exhaust valve epimere 9 and second moving block 15, exhaust valve hypomere 7 moves down under the effect of holddown spring, thereby makes the inlet and exhaust valve lift become big.Therefore, the present invention can take into account the high and low rotating speed operating mode of motor preferably.
Claims (2)
1. suction pressure regulating type intake and exhaust variable valve lift system; Comprise cylinder (1), piston (2), cylinder head (3), intake duct (4), air outlet flue (5), intake valve hypomere (6) and exhaust valve hypomere (7); Piston (2) is installed in the space that cylinder (1) surrounded and with the internal face sealing of cylinder (1) and contacts; The suction port of the air outlet of intake duct (4), air outlet flue (5) all is connected with cylinder head; The lower end surface of the lower end surface of intake valve hypomere (6), exhaust valve hypomere (7) is all in the firing chamber; It is characterized in that also comprising that intake valve epimere (8), exhaust valve epimere (9), cavity volume (10), moving body (11), first run through pipe (12), first moving block (13), second runs through pipe (14), second moving block (15), suction tude (16), connecting tube (17) and spring (18); Moving body (11) is installed in the cavity volume (10) and with the internal face sealing of cavity volume (10) and contacts; First runs through pipe (12), second runs through two walls up and down that pipe (14) all runs through moving body (11); First moving block (13) be installed in first run through in the pipe (12) and with first run through pipe (12) internal face seal and contact; Second moving block (15) be installed in second run through in the pipe (14) and with second run through pipe (14) internal face seal and contact; The lower end surface of the lower end surface of first moving block (13), second moving block (15) is the plane; The upper-end surface of the upper-end surface of first moving block (13), second moving block (15) is the inclined-plane; Intake valve epimere (8) passes the upper wall surface of cavity volume (10) and stretches into first and runs through in the pipe (12), and the lower end surface of intake valve epimere (8) contacts with the upper-end surface sealing of first moving block (13), and intake valve hypomere (6) passes the lower wall surface of cavity volume (10) and stretches into first and runs through in the pipe (12); The upper-end surface of intake valve hypomere (6) contacts with the lower end surface sealing of first moving block (13); Exhaust valve epimere (9) passes the upper wall surface of cavity volume (10) and stretches into second and runs through in the pipe (14), and the lower end surface of exhaust valve epimere (9) contacts with the upper-end surface sealing of second moving block (15), and exhaust valve hypomere (7) passes the lower wall surface of cavity volume (10) and stretches into second and runs through in the pipe (14); The upper-end surface of exhaust valve hypomere (7) contacts with the lower end surface sealing of second moving block (15); The air outlet of suction tude (16) is connected with the suction port of intake duct (4), and the two ends of connecting tube (17) are connected with the left wall of suction tude (16), cavity volume (10) respectively, and the right wall of moving body (11) is connected through the right wall of spring (18) with cavity volume (10).
2. suction pressure regulating type intake and exhaust variable valve lift according to claim 1 system, the cross section that it is characterized in that said cavity volume (10) is a rectangular, said first runs through pipe (12), second runs through pipe (14) and is the uniform section pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103162780A CN102808670A (en) | 2012-08-30 | 2012-08-30 | Air intake/exhaust valve lift-variable system in air intake pressure regulating type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103162780A CN102808670A (en) | 2012-08-30 | 2012-08-30 | Air intake/exhaust valve lift-variable system in air intake pressure regulating type |
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| CN102808670A true CN102808670A (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103162780A Pending CN102808670A (en) | 2012-08-30 | 2012-08-30 | Air intake/exhaust valve lift-variable system in air intake pressure regulating type |
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| CN (1) | CN102808670A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454227A (en) * | 2014-10-21 | 2015-03-25 | 韦晓晖 | Piston system with volume cavity formed inside |
| CN106194445A (en) * | 2016-08-16 | 2016-12-07 | 上海交通大学 | Air bleeding valve spin mechanics for low-speed diesel engine |
| CN106246278A (en) * | 2016-08-16 | 2016-12-21 | 上海交通大学 | Intake and exhaust valve stroke synchronous regulation mechanism |
| CN106285823A (en) * | 2016-08-16 | 2017-01-04 | 上海交通大学 | Engine with supercharger valve stroke continuous changeable device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323671A1 (en) * | 1993-07-15 | 1995-01-19 | Schaeffler Waelzlager Kg | Continuously variable camshaft adjustment |
| US5463987A (en) * | 1994-07-13 | 1995-11-07 | Cukovich; Mark S. | Variable valve timing mechanism |
| US20020185090A1 (en) * | 2001-06-08 | 2002-12-12 | Trw Deutschland Gmbh | Device to actuate a gas shuttle valve in an internal combustion engine |
| GB2443690A (en) * | 2006-11-09 | 2008-05-14 | Anthony Edgar Blackburn | Retractable cam system for an 8-stroke and 4-stroke cycle change engine |
| KR20100029889A (en) * | 2008-09-09 | 2010-03-18 | 현대자동차주식회사 | Variable valve lift device |
| CN102588076A (en) * | 2012-03-27 | 2012-07-18 | 上海交通大学 | Volume cavity regulating intake device |
-
2012
- 2012-08-30 CN CN2012103162780A patent/CN102808670A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323671A1 (en) * | 1993-07-15 | 1995-01-19 | Schaeffler Waelzlager Kg | Continuously variable camshaft adjustment |
| US5463987A (en) * | 1994-07-13 | 1995-11-07 | Cukovich; Mark S. | Variable valve timing mechanism |
| US20020185090A1 (en) * | 2001-06-08 | 2002-12-12 | Trw Deutschland Gmbh | Device to actuate a gas shuttle valve in an internal combustion engine |
| GB2443690A (en) * | 2006-11-09 | 2008-05-14 | Anthony Edgar Blackburn | Retractable cam system for an 8-stroke and 4-stroke cycle change engine |
| KR20100029889A (en) * | 2008-09-09 | 2010-03-18 | 현대자동차주식회사 | Variable valve lift device |
| CN102588076A (en) * | 2012-03-27 | 2012-07-18 | 上海交通大学 | Volume cavity regulating intake device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454227A (en) * | 2014-10-21 | 2015-03-25 | 韦晓晖 | Piston system with volume cavity formed inside |
| CN106194445A (en) * | 2016-08-16 | 2016-12-07 | 上海交通大学 | Air bleeding valve spin mechanics for low-speed diesel engine |
| CN106246278A (en) * | 2016-08-16 | 2016-12-21 | 上海交通大学 | Intake and exhaust valve stroke synchronous regulation mechanism |
| CN106285823A (en) * | 2016-08-16 | 2017-01-04 | 上海交通大学 | Engine with supercharger valve stroke continuous changeable device |
| CN106194445B (en) * | 2016-08-16 | 2019-12-13 | 上海交通大学 | Exhaust valve self-rotating mechanism for low-speed diesel engine |
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Application publication date: 20121205 |