CN105971685A - Automatic following system of valve stroke - Google Patents
Automatic following system of valve stroke Download PDFInfo
- Publication number
- CN105971685A CN105971685A CN201610550795.2A CN201610550795A CN105971685A CN 105971685 A CN105971685 A CN 105971685A CN 201610550795 A CN201610550795 A CN 201610550795A CN 105971685 A CN105971685 A CN 105971685A
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- CN
- China
- Prior art keywords
- extrusion
- spring
- control volume
- centrifugal
- movable block
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
Abstract
The invention belongs to the technical field of machine design and discloses an automatic following system of the valve stroke. The automatic following system comprises an executing body, a moving body, a penetrating pipe, a moving block, a pull rod, a control body, a rotating shaft, centrifugal bodies, balls, springs and a stretching body, wherein the moving body is arranged inside the executing body, the penetrating pipe is arranged inside the moving body, the moving block is arranged inside the penetrating pipe, the rotating shaft is fixedly connected to the control body and is connected to an engine crankshaft through a chain, the first springs, the centrifugal bodies, the balls, the second spring and the stretching body are arranged inside the control body, and the longitudinal sections of the centrifugal bodies and the stretching body are respectively of a trapezoidal shape. According to the automatic following system, when the rotation speed of an engine is high, the valve stroke is large; when the rotation speed of the engine is small, the valve stroke is small. The automatic following system is reasonable in design, simple in structure and suitable for optimization design of a valve stroke-variable system of the engine.
Description
Technical field
The present invention relates to the variable valve lift system of a kind of technical field of mechanical design, particularly one is applicable to gas
The valve stroke automatic following system that door lift is associated with engine speed.
Background technology
Traditional petrolic valve stroke is fixing immutable, and namely the cam profile of camshaft is only
Having one, this has resulted in this lift can not make electromotor all obtain good response in high velocity and low regime.
The valve stroke i.e. design of cam contour line of conventional gasoline machine electromotor be to electromotor under full working scope balance choosing
Selecting, its result is that electromotor both can not get optimal high speed efficiency, also can not get optimal low speed torque, but obtains
Arrive best balanced performance under full working scope.The employing of lift range variable, makes electromotor in high velocity and low regime
The valve stroke of demand can be met, thus improve high engine speeds power and low speed torque.
Through the retrieval of prior art literature is found, China Patent No. application number 200910190522.1, patent name:
The hydraulic valve mechanism of a kind of lift range variable, this patented technology provides the device of a kind of variable valve lift, can be preferably
Take into account the high and low rotating speed operating mode of electromotor.But its design is the hydraulic mechanism utilized, the highest to sealing requirements, close
Fluid seepage is easily caused if Feng Buyan；And owing to liquid exists certain compressibility, the sound of valve stroke change
Speed is answered to have certain retardance.
Summary of the invention
Originally the present invention is directed to above-mentioned the deficiencies in the prior art, it is provided that a kind of mechanical conditioning type variable valve lift system, energy
The response speed making valve stroke change is very fast.
The present invention is achieved through the following technical solutions, the present invention include inlet manifold, compressor, air intake branch,
On cylinder cap, cylinder body, piston, exhaust branch pipe, turbine, exhaust main, inlet valve hypomere, exhaust valve hypomere, inlet valve
Section, perform body, moving body, run through pipe, movable block, pull bar, control volume, rotary shaft, the first spring, be centrifuged body,
Ball, the second spring, extrusion, inlet manifold, air intake branch link together, and exhaust branch pipe, exhaust main connect
Together, compressor is arranged on inlet manifold, and turbine is arranged on exhaust main, and piston is arranged in cylinder body, air inlet
Door hypomere, exhaust valve hypomere are arranged on cylinder cap, and it is internal that moving body is arranged in execution, runs through pipe and is arranged in moving body,
Movable block is arranged in and runs through in pipe, and the vertical section of movable block is trapezoidal, and the upper end of inlet valve hypomere is through the lower wall performing body
Touching with the bottom connection of movable block behind face, the top phase after the upper wall surface performing body with movable block is crossed in the lower end of inlet valve epimere
Contact, rotary shaft is consolidated with control volume, and rotary shaft is connected with engine crankshaft by chain, the first spring,
Centrifugal body, ball, the second spring, extrusion are arranged in control volume, and centrifugal body, the vertical section of extrusion are ladder
Shape, ball is embedded in the outside wall surface of extrusion, and a side wall surface of centrifugal body contacts with ball, the opposite side of centrifugal body
Wall is connected with the internal face of control volume by the first spring, and the right wall of extrusion is by the second spring and control volume
Internal face is connected, and one end of pull bar is connected with extrusion left wall face, and the other end of pull bar is through performing body
After wall, the right wall with moving body is consolidated.
Further, in the present invention, centrifugal body, ball are array and arrange, the cross section of control volume internal cavity
For round, the cross section of extrusion is round, and the cross section of centrifugal body is rectangle.
Compared with prior art, the present invention have the advantages that into: the present invention is reasonable in design, simple in construction, valve
Lift can followed by the rotating speed started and be changed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial enlarged drawing of Fig. 1；
Fig. 3 is the profile of control volume in the present invention；
Fig. 4 is the structural representation of A-A section in Fig. 1；
Fig. 5 is the structural representation of B-B section in Fig. 3；
Wherein: 1, inlet manifold, 2, compressor, 3, air intake branch, 4, cylinder cap, 5, cylinder body, 6, piston, 7,
Exhaust branch pipe, 8, turbine, 9, exhaust main, 10, inlet valve hypomere, 11, exhaust valve hypomere, 12, on inlet valve
Section, 13, perform body, 14, moving body, 15, run through pipe, 16, movable block, 17, pull bar, 18, control volume, 19,
Rotary shaft, the 20, first spring, 21, centrifugal body, 22, ball, the 23, second spring, 24, extrusion.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are elaborated, the present embodiment premised on technical solution of the present invention,
Give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figures 1 to 5, the present invention includes inlet manifold 1, compressor 2, air intake branch 3, cylinder cap 4, cylinder body
5, piston 6, exhaust branch pipe 7, turbine 8, exhaust main 9, inlet valve hypomere 10, exhaust valve hypomere 11, inlet valve
Epimere 12, perform body 13, moving body 14, run through pipe 15, movable block 16, pull bar 17, control volume 18, rotary shaft
19, the first spring 20, centrifugal body 21, ball the 22, second spring 23, extrusion 24, inlet manifold 1, air inlet are propped up
Pipe 3 links together, and exhaust branch pipe 7, exhaust main 9 link together, and compressor 2 is arranged on inlet manifold 1,
Turbine 8 is arranged on exhaust main 9, and piston 6 is arranged in cylinder body 5, inlet valve hypomere 10, exhaust valve hypomere 11
Being arranged on cylinder cap 4, moving body 14 is arranged in execution body 13, runs through pipe 15 and is arranged in moving body 14, mobile
Block 16 is arranged in and runs through in pipe 15, and the vertical section of movable block 16 is trapezoidal, and the upper end of inlet valve hypomere 10 is through performing
After the lower wall surface of body 13, the bottom connection with movable block 16 touches, and the upper wall performing body 13 is crossed in the lower end of inlet valve epimere 12
Behind face, the top with movable block 16 contacts, and rotary shaft 19 is consolidated with control volume 18, and rotary shaft 19 passes through chain
Bar is connected with engine crankshaft, the first spring 20, centrifugal body 21, ball the 22, second spring 23, extrusion 24
Being arranged in control volume 18, centrifugal body 21, the vertical section of extrusion 24 are trapezoidal, and ball 22 is embedded in stretching
In the outside wall surface of body 24, a side wall surface of centrifugal body 21 contacts with ball 22, and the opposite side wall of centrifugal body 21 leads to
Crossing the first spring 20 to be connected with the internal face of control volume 18, the right wall of extrusion 24 is by the second spring 23 and control
The internal face of body 18 processed is connected, and one end of pull bar 17 is connected with extrusion 24 left wall face, pull bar 17
The other end is consolidated with the right wall of moving body 14 after performing the wall of body 13, centrifugal body 21, ball 22
Being array to arrange, the cross section of control volume 18 internal cavity is round, and the cross section of extrusion 24 is round, from
The cross section of heart body 21 is rectangle.
In the implementation process of the present invention, rotary shaft 19 is connected with engine crankshaft by chain.Work as engine speed
Time higher, the rotary speed of control volume 18 is the highest, and under the left and right of centrifugal force, centrifugal body 21 is displaced outwardly and compresses the
One spring 20, extrusion 24 moves right under the effect of the second spring 23 so that pull bar 17 pull moving body 14,
Movable block 16 moves right together, and inlet valve epimere 12 moves up, and the overall lift of inlet valve becomes big.In like manner, when
When engine speed is relatively low, the rotary speed of control volume 18 is relatively low, and under the effect of the first spring 20, centrifugal body is inwards
Mobile, extrusion 24 is moved to the left, so that pull bar 17 pulls moving body 14, movable block 16 to be moved to the left together,
Inlet valve epimere 12 moves down, and the overall lift of inlet valve diminishes.
Claims (2)
1. a valve stroke automatic following system, including inlet manifold (1), compressor (2), air intake branch (3),
Under cylinder cap (4), cylinder body (5), piston (6), exhaust branch pipe (7), turbine (8), exhaust main (9), inlet valve
Section (10), exhaust valve hypomere (11), inlet manifold (1), air intake branch (3) link together, exhaust branch pipe (7),
Exhaust main (9) links together, and compressor (2) is arranged on inlet manifold (1), turbine (8) row of being arranged in
On gas house steward (9), piston (6) is arranged in cylinder body (5), inlet valve hypomere (10), exhaust valve hypomere (11)
Be arranged on cylinder cap (4), it is characterised in that also include inlet valve epimere (12), perform body (13), moving body (14),
Run through pipe (15), movable block (16), pull bar (17), control volume (18), rotary shaft (19), the first spring (20),
Centrifugal body (21), ball (22), the second spring (23), extrusion (24), moving body (14) is arranged in execution body
(13) in, running through pipe (15) and be arranged in moving body (14), movable block (16) is arranged in and runs through in pipe (15),
The vertical section of movable block (16) is trapezoidal, after the upper end of inlet valve hypomere (10) passes the lower wall surface performing body (13)
Touch with the bottom connection of movable block (16), the lower end of inlet valve epimere (12) cross after the upper wall surface of execution body (13) with
The top of movable block (16) contacts, and rotary shaft (19) is consolidated with control volume (18), rotary shaft (19)
It is connected with engine crankshaft by chain, the first spring (20), centrifugal body (21), ball (22), the second spring
(23), in extrusion (24) is arranged in control volume (18), centrifugal body (21), the vertical section of extrusion (24)
Being trapezoidal, ball (22) is embedded in the outside wall surface of extrusion (24), a side wall surface of centrifugal body (21) and rolling
Pearl (22) contacts, and the opposite side wall of centrifugal body (21) is interior by the first spring (20) and control volume (18)
Wall is connected, and the right wall of extrusion (24) is connected with the internal face of control volume (18) by the second spring (23)
Connecing and be connected, one end of pull bar (17) is connected with extrusion (24) left wall face, and the other end of pull bar (17) passes
After performing the wall of body (13), the right wall with moving body (14) is consolidated.
Valve stroke automatic following system the most according to claim 1, it is characterised in that centrifugal body (21), ball (22)
Being array to arrange, the cross section of control volume (18) internal cavity is round, and the cross section of extrusion (24) is circle
Type, the cross section of centrifugal body (21) is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550795.2A CN105971685A (en) | 2016-07-13 | 2016-07-13 | Automatic following system of valve stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610550795.2A CN105971685A (en) | 2016-07-13 | 2016-07-13 | Automatic following system of valve stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105971685A true CN105971685A (en) | 2016-09-28 |
Family
ID=56953138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610550795.2A Pending CN105971685A (en) | 2016-07-13 | 2016-07-13 | Automatic following system of valve stroke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971685A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926834A (en) * | 2012-10-12 | 2013-02-13 | 上海交通大学 | Mechanical type valve stroke continuously-variable device |
| CN202991165U (en) * | 2012-12-04 | 2013-06-12 | 朱锋 | Tappet height mechanical regulation device |
| CN103233793A (en) * | 2013-04-07 | 2013-08-07 | 上海交通大学 | Valve control mechanism with stepping motor |
| CN103277164A (en) * | 2013-05-09 | 2013-09-04 | 上海交通大学 | Push-pull valve height variable system |
| CN105422271A (en) * | 2015-12-21 | 2016-03-23 | 康明 | Slope-type pull rod up and down moving device |
| CN105464791A (en) * | 2015-12-21 | 2016-04-06 | 王悦萍 | Top end air inflation smooth movement system |
| CN105508028A (en) * | 2015-12-21 | 2016-04-20 | 康明 | Slope-inlaid type rolling device |
-
2016
- 2016-07-13 CN CN201610550795.2A patent/CN105971685A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926834A (en) * | 2012-10-12 | 2013-02-13 | 上海交通大学 | Mechanical type valve stroke continuously-variable device |
| CN202991165U (en) * | 2012-12-04 | 2013-06-12 | 朱锋 | Tappet height mechanical regulation device |
| CN103233793A (en) * | 2013-04-07 | 2013-08-07 | 上海交通大学 | Valve control mechanism with stepping motor |
| CN103277164A (en) * | 2013-05-09 | 2013-09-04 | 上海交通大学 | Push-pull valve height variable system |
| CN105422271A (en) * | 2015-12-21 | 2016-03-23 | 康明 | Slope-type pull rod up and down moving device |
| CN105464791A (en) * | 2015-12-21 | 2016-04-06 | 王悦萍 | Top end air inflation smooth movement system |
| CN105508028A (en) * | 2015-12-21 | 2016-04-20 | 康明 | Slope-inlaid type rolling device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |