CN108506059A - A kind of mechanical type variable valve driving device - Google Patents
A kind of mechanical type variable valve driving device Download PDFInfo
- Publication number
- CN108506059A CN108506059A CN201810179660.9A CN201810179660A CN108506059A CN 108506059 A CN108506059 A CN 108506059A CN 201810179660 A CN201810179660 A CN 201810179660A CN 108506059 A CN108506059 A CN 108506059A
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- CN
- China
- Prior art keywords
- molded line
- tablet
- valve
- cam
- mechanical type
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The present invention provides a kind of mechanical type variable valve driving devices, including valve, valve spring is equipped in the middle part of the valve, gear is installed at top, and the gear can rotate around the valve, the periphery of the gear with connect control-rod, top is installed by tablet, the tablet is internally provided with groove, and top is equipped with cam, and valve clearance is equipped between the cam and the tablet.Mechanical type variable valve driving device of the present invention, tablet is set to rotate 180 ° by the linear motion distance of lever for adjusting oil, the cooperation rule between the first molded line, the second molded line and tablet interior grooves can be changed, to realize that 2/4 stroke is variable, control mechanism need not be operated under each working cycles, but need just to be adjusted under the operating mode changed in stroke, control is simple, is conducive to the engineering application of changeable air valve technology.
Description
Technical field
The invention belongs to engine arts, more particularly, to a kind of mechanical type variable valve driving device.
Background technology
Internal combustion engine is still that thermal efficiency highest, unit volume and the maximum prime mover of power-weight ratio, application are non-so far
Often extensively, however as the gradual shortage and the continuous deterioration of environmental resource of world energy sources, it would be desirable to which internal combustion engine meets more
Stringent emission regulation and economic index.Traditional combustion engine takes the camshaft actuated valve of fixed molded line, this makes internal combustion
The discharge of machine can not reach best with oil consumption in all operating points, and therefore, most internal combustion engine all uses changeable air valve
Technical controlling discharges, and reduces oil consumption.
Changeable air valve technology is broadly divided into variable gas distribution technology based on camshaft and at present without cam distribution technology.The former
It is main to change mechanical structure, therefore simple in structure, fast response time, but because remaining cam, valve is only opposite can
Become, can not arbitrarily can be changed.And it then can arbitrarily change valve timing, lift and duration without cam distribution technology.With regard to driving
Flowing mode divides, and no cam distribution technology is divided into the modes such as electromagnetic drive, electrically driven, motor driving, electro-hydraulic driving.Relative to
The shortcomings of energy consumption of electromagnetic drive is big, and electrically driven response speed is low and unstable, motor-driven system complex, electro-hydraulic drive
It is dynamic it is relatively easy without cam distribution technical pattern, response speed is very fast.However it also have the shortcomings that it is inevitable：Under high rotating speed
Flow rate of hydraulic system is inadequate, and valve reaches at maximum lift and take a seat place, and speed is fast, impact force is big.Therefore it is mainly used for diesel engine
On this lower engine of rotating speed, in addition to this, it is necessary to use expensive electrohydraulic servo system and relative complex control
Technology processed avoids impact of taking a seat to be accurately controlled valve stroke, considerably increases the cost of engine.Therefore, it is necessary to be directed to hair
The specific purposes of motivation uses suitable changeable air valve technology.It is has been common that such as patent of invention (title：Multi-mode 2 is rushed
The stroke explosive motor of journey/4；The patent No.：200880102440.0) described in, by the way that engine strokes are transported from 4 strokes
Row, which is switched to the operation of 2 strokes, can so that combustion frequency is double, or even hair is also realized when the output work of each cycle is identical
Motivation power it is double.It is necessary to be directed to the demand, research energy consumption valve low, simple in structure and flexibility and changeability as a result,
Mechanism, to realize that 2/4 stroke exchanges function.
Invention content
In view of this, the present invention is directed to propose a kind of mechanical type variable valve driving device, by change cam profile with
Cooperation rule between tablet inside, it is final to realize that 2/4 stroke exchanges work(to change the matching relationship between cam and valve
Energy.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of mechanical type variable valve driving device, including cam, tablet, valve, gear and control-rod, the valve top
The gear is installed in portion, and the gear exterior connects the control-rod, and the control-rod can control the gear relative to described
180 ° of valve rotation, the gear top are fixedly mounted the tablet, and the tablet is internally provided with a groove, on the tablet
Side is equipped with the cam, is equipped with valve clearance between the cam and the tablet, and the external peripheral surface of the cam is equipped with the
One molded line and the second molded line, when first molded line and the groove are worked in coordination, first molded line and the tablet without
Contact, second molded line drive the valve opening and closing；When second molded line and the groove are worked in coordination, institute
It states the second molded line and the tablet is contactless, first molded line drives the valve opening and closing.
Further, first molded line is double peach-shapeds, described when first molded line is engaged with the tablet
Cam every revolution, first molded line drive the tablet twice.
Further, second molded line is single peach-shaped, described when second molded line is engaged with the tablet
Cam every revolution, first molded line drive the tablet primary.
Further, the quantity of first molded line and second molded line is one, and in the cam
Portion.
Further, the control-rod is equipped with spur gear.
Further, it is equipped with valve spring in the middle part of the valve.
Further, the cam and engine speed ratio are 1: 2.
Compared with the existing technology, mechanical type variable valve driving device of the present invention has the advantage that：
(1) mechanical type variable valve driving device of the present invention is made by the linear motion distance of lever for adjusting oil
Tablet rotates 180 °, thus it is possible to vary the cooperation rule between the first molded line, the second molded line and tablet interior grooves, to realize 2/
4 strokes are variable.
(2) mechanical type variable valve driving device of the present invention, need not be under each working cycles to control
Mechanism processed is operated, but needs just to be adjusted under the operating mode changed in stroke, and control is simple, is conducive to changeable air valve skill
The engineering application of art.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram when embodiment of the present invention is in valve-closing under 4 stroke operating modes；
Fig. 2 is the schematic diagram when embodiment of the present invention is in valve opening under 4 stroke operating modes；
Fig. 3 is the schematic diagram when embodiment of the present invention is in valve-closing under 2 stroke operating modes；
Fig. 4 is the schematic diagram when embodiment of the present invention is in valve opening under 2 stroke operating modes；
Fig. 5 is the front view of cam in the embodiment of the present invention；
Fig. 6 is the left view of Fig. 5；
Fig. 7 is the vertical view of Fig. 1 and Fig. 2 middle plateforms；
Fig. 8 is the vertical view of Fig. 3 and Fig. 4 middle plateforms；
Fig. 9 is the schematic diagram of gear and control-rod cooperation.
Reference sign：
1- cams；The first molded line of 11-；The second molded line of 12-；2- tablets；21- grooves；3- valve spring；4- valves；5- teeth
Wheel；6- control-rods.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of mechanical type variable valve driving device, as shown in Figures 1 to 9, including cam 1, tablet 2, valve 4, gear 5
With control-rod 6, the gear 5 is installed at the top of the valve 4, control-rod 6 described in 5 external connection of the gear, the control-rod 6
The controllable gear 5 rotates 180 ° relative to the valve 4, and the tablet 2 is fixedly mounted in 5 top of the gear, described flat
Plate 2 is internally provided with a groove 21, and 2 top of the tablet is equipped with the cam 1, is equipped between the cam 1 and the tablet 2
The external peripheral surface of valve clearance, the cam 1 is equipped with the first molded line 11 and the second molded line 12, when first molded line 11 and institute
When stating groove 21 and working in coordination, first molded line 11 is contactless with the tablet 2, and second molded line 12 drives the valve
5 open and close；When second molded line 12 and the groove 21 are worked in coordination, second molded line 12 and the tablet 2
Contactless, first molded line 11 drives the valve 5 to open and close.
First molded line 11 is double peach-shapeds, when first molded line 11 is engaged with the tablet 2, the cam
1 every revolution, first molded line 11 drive the tablet 2 twice.
Second molded line 12 is single peach-shaped, when second molded line 12 is engaged with the tablet 2, the cam
1 every revolution, first molded line 12 drive the tablet 2 primary.
The quantity of first molded line 11 and second molded line 12 is one, and positioned at the middle part of the cam 1.
The control-rod 6 is equipped with spur gear, the gear 5 movable linearly of control-rod 6.
4 middle part of the valve is equipped with valve spring 3.
The cam 1 is 1: 2 with engine speed ratio.
A kind of course of work of mechanical type variable valve driving device is：
In fig. 1 and 2, first molded line 11 is worked in coordination with the groove 21, first molded line 11 with it is described
Tablet 2 is contactless, thus the characteristics of motion of first molded line 11 on the tablet 2 without influence.In Fig. 1, the second type
Line 12 is in base circle conditions, at this time second molded line 12 to the tablet 2 and valve 4 without driving effect, therefore valve 4
It is closed under the preload force effect of the valve spring 3；In fig. 2, second molded line 12 is in raised position,
Second molded line 12 drives the tablet 2 and valve 4 at this time, and the active force of the valve spring 3 is overcome to make institute
State the opening of valve 4.Since second molded line 12 is single peach-shaped shape, the rotating speed of cam 1 and the rotating ratio of engine are 1：2, institute
With every turn two circle of engine, the cam 1 turns around, and second molded line 12 can drive the tablet 2 primary, and engine is made to do
Work(is primary, therefore is four-stoke mode.
As shown in Fig. 3, Fig. 4, Fig. 7 and Fig. 8, when valve 4 is closed down, the linear movement using control-rod 6 makes
The gear 5 rotates 180 ° relative to the valve 4, and second molded line 12 is worked in coordination with the groove 21 at this time, described
Second molded line 12 and the tablet 2 are contactless, thus the characteristics of motion of second molded line 12 on the tablet 2 without influence.
In Fig. 3, first molded line 11 is in base circle conditions, at this time first molded line 11 to the tablet 2 and valve 4 without driving
Effect, therefore valve 4 is closed under the preload force effect of the valve spring 3；In Fig. 4, first molded line
11 are in raised position, and first molded line 11 drives the tablet 2 and valve 4 at this time, overcomes the valve bullet
The active force of spring 3 makes the valve 4 open.Since first molded line 11 is double peach-shaped shapes, the rotating speed of cam 1 and engine
Rotating ratio is 1：2, so every turn of engine two encloses, the cam 1 turns around, and first molded line 11 can drive the tablet 2
Twice, make engine acting twice, therefore be two-stroke mode.
To sum up, by changing the linear motion displacement of the control-rod 6, thus it is possible to vary the second molded line 12, the first molded line 11
With the cooperation rule between 2 interior grooves 21 of the tablet, finally change the characteristics of motion of the valve 5, realizes that 2/4 stroke can
Become.The present invention need not operate control mechanism under each working cycles, but the work for needing to change in stroke
It is just adjusted under condition, control is simple, is conducive to the engineering application of changeable air valve technology.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of mechanical type variable valve driving device, it is characterised in that：Including cam (1), tablet (2), valve (4), gear
(5) and control-rod (6),
The gear (5) is installed at the top of the valve (4), control-rod (6) described in gear (5) external connection, the control
Bar (6) can control the gear (5) to rotate 180 ° relative to the valve (4), is fixedly mounted at the top of the gear (5) described flat
Plate (2), the tablet (2) are internally provided with a groove (21), the cam (1), the cam are equipped with above the tablet (2)
(1) it is equipped with valve clearance between the tablet (2), the external peripheral surface of the cam (1) is equipped with the first molded line (11) and the
Two molded line (12),
When first molded line (11) and the groove (21) are worked in coordination, first molded line (11) and the tablet (2)
Contactless, second molded line (12) drives the valve (5) to open and close；When second molded line (12) and the groove
(21) when working in coordination, second molded line (12) and the tablet (2) are contactless, and first molded line (11) drives the gas
Door (5) opens and closes.
2. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：First molded line
(11) it is double peach-shapeds, when first molded line (11) is engaged with the tablet (2), cam (1) every revolution, institute
It states the first molded line (11) and drives the tablet (2) twice.
3. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：Second molded line
(12) it is single peach-shaped, when second molded line (12) is engaged with the tablet (2), cam (1) every revolution, institute
Stating the first molded line (12) drives the tablet (2) primary.
4. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：First molded line
(11) and the quantity of second molded line (12) is one, and positioned at the middle part of the cam (1).
5. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：The control-rod (6)
It is equipped with spur gear.
6. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：In the valve (4)
Portion is equipped with valve spring (3).
7. a kind of mechanical type variable valve driving device according to claim 1, it is characterised in that：The cam (1) with
Engine speed ratio is 1: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810179660.9A CN108506059B (en) | 2018-03-05 | 2018-03-05 | A kind of mechanical type variable valve driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810179660.9A CN108506059B (en) | 2018-03-05 | 2018-03-05 | A kind of mechanical type variable valve driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506059A true CN108506059A (en) | 2018-09-07 |
| CN108506059B CN108506059B (en) | 2019-09-06 |
Family
ID=63376083
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810179660.9A Active CN108506059B (en) | 2018-03-05 | 2018-03-05 | A kind of mechanical type variable valve driving device |
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| Country | Link |
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| CN (1) | CN108506059B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5950583A (en) * | 1997-04-25 | 1999-09-14 | Dr. Ing. H.C.F. Porsche Ag | Valve gear of an internal-combustion engine |
| CN101443536A (en) * | 2006-05-01 | 2009-05-27 | 里卡多公司 | Modulated combined lubrication and control pressure system for two-stroke/four-stroke switching |
| GB2470025A (en) * | 2009-05-06 | 2010-11-10 | Thomas Tsoi Hei Ma | Switchable valve actuation system for a selectable 2-stroke/ 4-stroke i.c engine |
| CN106762001A (en) * | 2016-12-21 | 2017-05-31 | 朱譞晟 | The full variable valve driving apparatus of the camshaft of geometry containing continuous variable and adder |
| CN107676144A (en) * | 2017-09-30 | 2018-02-09 | 中国北方发动机研究所(天津) | A kind of 2/4 Stroke Engine hydraulic variable valve mechanism |
-
2018
- 2018-03-05 CN CN201810179660.9A patent/CN108506059B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5950583A (en) * | 1997-04-25 | 1999-09-14 | Dr. Ing. H.C.F. Porsche Ag | Valve gear of an internal-combustion engine |
| CN101443536A (en) * | 2006-05-01 | 2009-05-27 | 里卡多公司 | Modulated combined lubrication and control pressure system for two-stroke/four-stroke switching |
| GB2470025A (en) * | 2009-05-06 | 2010-11-10 | Thomas Tsoi Hei Ma | Switchable valve actuation system for a selectable 2-stroke/ 4-stroke i.c engine |
| CN106762001A (en) * | 2016-12-21 | 2017-05-31 | 朱譞晟 | The full variable valve driving apparatus of the camshaft of geometry containing continuous variable and adder |
| CN107676144A (en) * | 2017-09-30 | 2018-02-09 | 中国北方发动机研究所(天津) | A kind of 2/4 Stroke Engine hydraulic variable valve mechanism |
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| Publication number | Publication date |
|---|---|
| CN108506059B (en) | 2019-09-06 |
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