CN102966394B - Dual moving block synchronous movement type mechanical system for valve lift modulation of engine - Google Patents

Dual moving block synchronous movement type mechanical system for valve lift modulation of engine Download PDF

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Publication number
CN102966394B
CN102966394B CN201210438991.2A CN201210438991A CN102966394B CN 102966394 B CN102966394 B CN 102966394B CN 201210438991 A CN201210438991 A CN 201210438991A CN 102966394 B CN102966394 B CN 102966394B
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China
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pipe
moving
moving block
cavity volume
engine
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Expired - Fee Related
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CN201210438991.2A
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Chinese (zh)
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CN102966394A (en
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韦红雨
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Abstract

The invention relates to a dual moving block synchronous movement type mechanical system, which belongs to the technical field of mechanical design. The dual moving block synchronous movement type mechanical system comprises an air inlet, an air outlet, an inlet valve lower section, an exhaust valve, an inlet valve upper section, a containing cavity, moving bodies, a penetrating tube, moving blocks, a connecting tube and springs, wherein the lower end surfaces of the first moving block and the second moving block are flat surfaces, the upper end surfaces of the first moving block and the second moving block are inclined surfaces, the left wall surface of the first moving body is connected with the left wall surface of the containing cavity through the first spring, and the right wall surface of the second moving body is connected with the right wall surface of the containing cavity through the second spring. When pressure in an exhaust tube of an engine is higher, the first moving body is moved to the left, the second moving body is moved to the right, and the lift ranges of an inlet valve and the exhaust valve are increased. When the pressure in the exhaust tube of the engine is lower, the first moving body is moved to the right, the second moving body is moved to the left, and the lift ranges of the inlet valve and the exhaust valve are reduced. The dual moving block synchronous movement type mechanical system has the advantages of reasonable design and simple structure, and is suitable for an engine variable valve lift system.

Description

The two-track motion block synchronizing moving formula mechanical system that engine air valve lift regulates
Technical field
What the present invention relates to is a kind of engine intake and exhaust system, particularly a kind of two-track motion block synchronizing moving formula mechanical system of technical field of mechanical design.
Background technique
Traditional petrolic valve lift is fixing immutable, and namely the cam profile of camshaft only has one, and this just causes 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 and design of cam contour line select the balance of motor under full working scope, consequently motor both can not get best high speed efficiency, also can not get best low speed torque, but best balanced performance under obtaining full working scope.The employing of lift range variable, makes motor can be met the valve lift of demand in high velocity and low velocity zone, thus improves high engine speeds power and low speed torque.
Through finding the retrieval of prior art document, China Patent No. 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 utilized, and very high to sealing requirements, poorly sealed words easily cause fluid seepage; And there is certain compressibility due to liquid, the speed of response of valve lift change has certain retardance.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, provide a kind of two-track motion block synchronizing moving formula mechanical system, the speed of response that valve lift can be made to change is very fast.
The present invention is achieved through the following technical solutions, the present invention includes: cylinder, piston, cylinder head, intake duct, air outlet flue, intake valve hypomere, exhaust valve hypomere, compressor air inlet machine pipe, gas compressor, engine air inlet tube, engine exhaust pipe, turbine, turbine steam outlet pipe, intake valve epimere, exhaust valve epimere, cavity volume, first moving body, first runs through pipe, first moving block, second moving body, second runs through pipe, second moving block, first spring, second spring and connecting tube, piston to be arranged in space that cylinder surrounds and to seal with the internal face of cylinder and contacts, the air outlet of intake duct, the suction port of air outlet flue is all connected with cylinder head, the air inlet/outlet of gas compressor respectively with the air outlet of gas compressor machine suction tude, the suction port of engine air inlet tube is connected, and the air outlet of engine air inlet tube is connected with the suction port of intake duct, the air inlet/outlet of turbine respectively with the air outlet of engine exhaust pipe, the suction port of turbine steam outlet pipe is connected, and the suction port of engine exhaust pipe is connected with the air outlet of air outlet flue, the lower end surface of intake valve hypomere, the lower end surface of exhaust valve hypomere all in firing chamber, the first moving body, second moving body to be installed in cavity volume and to seal with the internal face of cavity volume and contacts, and first runs through pipe, second runs through pipe passes through the first moving body respectively, two walls up and down of the second moving body, first moving block is arranged on first to be run through in pipe and to seal with the first internal face running through pipe and contact, second moving block is arranged on second to be run through in pipe and to seal with the second internal face running through pipe and contact, the lower end surface of the first moving block, the lower end surface of the second moving block is plane, the upper-end surface of the first moving block, the upper-end surface of the second moving block is inclined-plane, intake valve epimere through cavity volume upper wall surface and stretch into first and run through in pipe, the lower end surface of intake valve epimere seals with the upper-end surface of the first moving block and contacts, intake valve hypomere through cavity volume lower wall surface and stretch into first and run through in pipe, the upper-end surface of intake valve hypomere seals with the lower end surface of the first moving block and contacts, exhaust valve epimere through cavity volume upper wall surface and stretch into second and run through in pipe, the lower end surface of exhaust valve epimere seals with the upper-end surface of the second moving block and contacts, exhaust valve hypomere through cavity volume lower wall surface and stretch into second and run through in pipe, the upper-end surface of exhaust valve hypomere seals with the lower end surface of the second moving block and contacts, the cross section of cavity volume is rectangular, and first runs through pipe, second runs through pipe is uniform section pipe, the left wall of the first moving body is connected with the left wall of cavity volume by the first spring, the right wall of the second moving body is connected with the right wall of cavity volume by the second spring, the two ends of connecting tube respectively with engine exhaust pipe, the upper wall surface of cavity volume is connected.
In the present invention, the first moving body, the second moving body, the first moving block and the second moving block all can move left and right in cavity volume, and the first moving block, the second moving block also can followed by inlet and exhaust valve upper-lower section and move up and down together running through in pipe.When engine exhaust overpressure is lower, first moving body moves right under the elastic reaction of the first spring, second moving body is moved to the left under the elastic reaction of the second spring, first moving block, the second moving block also move simultaneously, the lower end surface of intake valve epimere and the upper-end surface relative sliding of the first moving block, intake valve hypomere moves up under the effect of holddown spring, the lower end surface of exhaust valve epimere and the upper-end surface relative sliding of the second moving block, exhaust valve hypomere moves up under the effect of holddown spring, thus inlet and exhaust valve lift is diminished.When engine exhaust overpressure is higher, first moving body is moved to the left and compresses the first spring, second moving body moves right and compresses the second spring, first moving block, the second moving block also move simultaneously, the lower end surface of intake valve epimere and the upper-end surface relative sliding of the first moving block, intake valve hypomere moves down under the effect of holddown spring, the lower end surface of exhaust valve epimere and the upper-end surface relative sliding of the second moving block, exhaust valve hypomere moves down under the effect of holddown spring, thus makes inlet and exhaust valve lift become large.
Compared with prior art, the present invention has following beneficial effect and is: the present invention is reasonable in design, and structure is simple, can realize the continuous variable of valve lift, and the speed of response that valve lift can be made again to change is very fast, and does not need special control mechanism.
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;
Wherein: 1, cylinder, 2, piston, 3, cylinder head, 4, intake duct, 5, air outlet flue, 6, intake valve hypomere, 7, exhaust valve hypomere, 8, compressor air inlet machine pipe, 9, gas compressor, 10, engine air inlet tube, 11, engine exhaust pipe, 12, turbine, 13, turbine steam outlet pipe, 14, intake valve epimere, 15, exhaust valve epimere, 16, cavity volume, 17, first moving body, 18, first runs through pipe, 19, first moving block, 20, second moving body, 21, second runs through pipe, 22, second moving block, 23, first spring, 24, second spring, 25, 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
As depicted in figs. 1 and 2, the present invention includes: comprise cylinder 1, piston 2, cylinder head 3, intake duct 4, air outlet flue 5, intake valve hypomere 6, exhaust valve hypomere 7, compressor air inlet machine pipe 8, gas compressor 9, engine air inlet tube 10, engine exhaust pipe 11, turbine 12, turbine steam outlet pipe 13, intake valve epimere 14, exhaust valve epimere 15, cavity volume 16, first moving body 17, first runs through pipe 18, first moving block 19, second moving body 20, second runs through pipe 21, second moving block 22, first spring 23, second spring 24 and connecting tube 25, piston 2 to be arranged in space that cylinder 1 surrounds and to seal with the internal face of cylinder 1 and contacts, the air outlet of intake duct 4, the suction port of air outlet flue 5 is all connected with cylinder head 3, the air inlet/outlet of gas compressor 9 respectively with the air outlet of gas compressor machine suction tude 8, the suction port of engine air inlet tube 10 is connected, and the air outlet of engine air inlet tube 10 is connected with the suction port of intake duct 4, the air inlet/outlet of turbine 12 respectively with the air outlet of engine exhaust pipe 11, the suction port of turbine steam outlet pipe 13 is connected, and the suction port of engine exhaust pipe 11 is connected with the air outlet of air outlet flue 5, the lower end surface of intake valve hypomere 6, the lower end surface of exhaust valve hypomere 7 all in firing chamber, the first moving body 17, second moving body 20 to be installed in cavity volume 16 and to seal with the internal face of cavity volume 16 and contacts, and first runs through pipe 18, second runs through pipe 21 passes through the first moving body 17 respectively, two walls up and down of the second moving body 20, first moving block 19 is arranged on first to be run through in pipe 18 and seals with the first internal face running through pipe 18 and contact, second moving block 22 is arranged on second to be run through in pipe 21 and seals with the second internal face running through pipe 21 and contact, the lower end surface of the first moving block 19, the lower end surface of the second moving block 22 is plane, the upper-end surface of the first moving block 19, the upper-end surface of the second moving block 22 is inclined-plane, intake valve epimere 14 through cavity volume 16 upper wall surface and stretch into first and run through in pipe 18, the lower end surface of intake valve epimere 14 seals with the upper-end surface of the first moving block 19 and contacts, intake valve hypomere 6 through cavity volume 16 lower wall surface and stretch into first and run through in pipe 18, the upper-end surface of intake valve hypomere 6 seals with the lower end surface of the first moving block 19 and contacts, exhaust valve epimere 15 through cavity volume 16 upper wall surface and stretch into second and run through in pipe 21, the lower end surface of exhaust valve epimere 15 seals with the upper-end surface of the second moving block 22 and contacts, exhaust valve hypomere 7 through cavity volume 16 lower wall surface and stretch into second and run through in pipe 21, the upper-end surface of exhaust valve hypomere 7 seals with the lower end surface of the second moving block 22 and contacts, the cross section of cavity volume 16 is rectangular, and first runs through pipe 18, second runs through pipe 21 is uniform section pipe, the left wall of the first moving body 17 is connected with the left wall of cavity volume 16 by the first spring 23, the right wall of the second moving body 20 is connected with the right wall of cavity volume 16 by the second spring 24, the two ends of connecting tube 25 respectively with engine exhaust pipe 11, the upper wall surface of cavity volume 16 is connected.
In the present invention, first moving body 17, second moving body 20, first moving block 19 and the second moving block 22 all can move left and right in cavity volume 16, and the first moving block 19, second moving block 22 also can followed by inlet and exhaust valve upper-lower section and move up and down together running through in pipe.When engine exhaust pipe 11 internal pressure is lower, first moving body 17 moves right under the elastic reaction of the first spring 23, second moving body 20 is moved to the left under the elastic reaction of the second spring 24, first moving block 19, second moving block 22 also moves simultaneously, the lower end surface of intake valve epimere 14 and the upper-end surface relative sliding of the first moving block 19, intake valve hypomere 6 moves up under the effect of holddown spring, the lower end surface of exhaust valve epimere 15 and the upper-end surface relative sliding of the second moving block 22, exhaust valve hypomere 7 moves up under the effect of holddown spring, thus inlet and exhaust valve lift is diminished.When engine exhaust pipe 11 internal pressure is higher, first moving body 17 is moved to the left and compresses the first spring 23, second moving body 20 moves right and compresses the second spring 24, first moving block 19, second moving block 22 also moves simultaneously, the lower end surface of intake valve epimere 14 and the upper-end surface relative sliding of the first moving block 19, intake valve hypomere 6 moves down under the effect of holddown spring, the lower end surface of exhaust valve epimere 15 and the upper-end surface relative sliding of the second moving block 22, exhaust valve hypomere 7 moves down under the effect of holddown spring, thus make inlet and exhaust valve lift become large.Therefore, the present invention can take into account the high and low rotating speed operating mode of motor preferably.

Claims (1)

1. the two-track motion block synchronizing moving formula mechanical system of an engine air valve lift adjustment, comprise cylinder (1), piston (2), cylinder head (3), intake duct (4), air outlet flue (5), intake valve hypomere (6), exhaust valve hypomere (7), compressor air inlet machine pipe (8), gas compressor (9), engine air inlet tube (10), engine exhaust pipe (11), turbine (12) and turbine steam outlet pipe (13), piston (2) to be arranged in space that cylinder (1) surrounds and to seal with the internal face of cylinder (1) and contacts, the air outlet of intake duct (4), the suction port of air outlet flue (5) is all connected with cylinder head (3), the air inlet/outlet of gas compressor (9) respectively with the air outlet of gas compressor machine suction tude (8), the suction port of engine air inlet tube (10) is connected, the air outlet of engine air inlet tube (10) is connected with the suction port of intake duct (4), the air inlet/outlet of turbine (12) respectively with the air outlet of engine exhaust pipe (11), the suction port of turbine steam outlet pipe (13) is connected, the suction port of engine exhaust pipe (11) is connected with the air outlet of air outlet flue (5), the lower end surface of intake valve hypomere (6), the lower end surface of exhaust valve hypomere (7) is all in firing chamber, characterized by further comprising intake valve epimere (14), exhaust valve epimere (15), cavity volume (16), first moving body (17), first runs through pipe (18), first moving block (19), second moving body (20), second runs through pipe (21), second moving block (22), first spring (23), second spring (24) and connecting tube (25), first moving body (17), second moving body (20) to be installed in cavity volume (16) and to seal with the internal face of cavity volume (16) and contacts, first runs through pipe (18), second runs through pipe (21) passes through the first moving body (17) respectively, two walls up and down of the second moving body (20), first moving block (19) is arranged on first to be run through in pipe (18) and to run through the internal face of managing (18) and seal with first and contact, second moving block (22) is arranged on second to be run through in pipe (21) and to run through the internal face of managing (21) and seal with second and contact, the lower end surface of the first moving block (19), the lower end surface of the second moving block (22) is plane, the upper-end surface of the first moving block (19), the upper-end surface of the second moving block (22) is inclined-plane, intake valve epimere (14) through cavity volume (16) upper wall surface and stretch into first and run through in pipe (18), the lower end surface of intake valve epimere (14) seals with the upper-end surface of the first moving block (19) and contacts, intake valve hypomere (6) through cavity volume (16) lower wall surface and stretch into first and run through in pipe (18), the upper-end surface of intake valve hypomere (6) seals with the lower end surface of the first moving block (19) and contacts, exhaust valve epimere (15) through cavity volume (16) upper wall surface and stretch into second and run through in pipe (21), the lower end surface of exhaust valve epimere (15) seals with the upper-end surface of the second moving block (22) and contacts, exhaust valve hypomere (7) through cavity volume (16) lower wall surface and stretch into second and run through in pipe (21), the upper-end surface of exhaust valve hypomere (7) seals with the lower end surface of the second moving block (22) and contacts, the cross section of cavity volume (16) is rectangular, first runs through pipe (18), second runs through pipe (21) is uniform section pipe, the left wall of the first moving body (17) is connected by the left wall of the first spring (23) with cavity volume (16), the right wall of the second moving body (20) is connected by the right wall of the second spring (24) with cavity volume (16), the two ends of connecting tube (25) respectively with engine exhaust pipe (11), the upper wall surface of cavity volume (16) is connected, inlet and exhaust valve can self-control under the effect of the first spring (23), the second spring (24).
CN201210438991.2A 2012-11-06 2012-11-06 Dual moving block synchronous movement type mechanical system for valve lift modulation of engine Expired - Fee Related CN102966394B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103277164A (en) * 2013-05-09 2013-09-04 上海交通大学 Push-pull valve height variable system
CN106168145A (en) * 2016-07-13 2016-11-30 孙志国 Rotary stress balance height adjustment mechanism
CN106285823A (en) * 2016-08-16 2017-01-04 上海交通大学 Engine with supercharger valve stroke continuous changeable device

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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
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CN102606279A (en) * 2012-03-27 2012-07-25 上海交通大学 Air inlet system with movable component in air inlet tube
CN102678279A (en) * 2012-05-21 2012-09-19 上海交通大学 Deflation type gas compressor surge regulation mechanism

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DE20109597U1 (en) * 2001-06-08 2001-09-27 Trw Deutschland Gmbh Device for actuating a gas exchange valve of an internal combustion engine
KR101405612B1 (en) * 2008-09-09 2014-06-10 현대자동차주식회사 Variable valve lift device

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
CN102588077A (en) * 2012-03-27 2012-07-18 上海交通大学 Engine intake system with variable-volume intake pipe
CN102606279A (en) * 2012-03-27 2012-07-25 上海交通大学 Air inlet system with movable component in air inlet tube
CN102678279A (en) * 2012-05-21 2012-09-19 上海交通大学 Deflation type gas compressor surge regulation mechanism

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