CN107701258A - A kind of engine high-efficiency admission gear - Google Patents
A kind of engine high-efficiency admission gear Download PDFInfo
- Publication number
- CN107701258A CN107701258A CN201710938783.1A CN201710938783A CN107701258A CN 107701258 A CN107701258 A CN 107701258A CN 201710938783 A CN201710938783 A CN 201710938783A CN 107701258 A CN107701258 A CN 107701258A
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- Prior art keywords
- piston
- valve
- cam
- efficiency
- admission gear
- Prior art date
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Links
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 2
- 230000001133 acceleration Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/16—Pneumatic means
-
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/18—Means for increasing the initial opening force on the valve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention provides a kind of engine high-efficiency admission gear, including cam, piston bush, piston, cylinder head and valve；Plunger shaft is surrounded between piston bush inwall and piston bottom end and cylinder head top；Piston tip is provided with roller, is provided with the guide groove of a circle inverted T-shape inside cam along direction of rotation, and roller is worked in coordination with guide groove, and outline and the piston of cam are worked in coordination；Passage is provided with inside valve stem, the passage end communicates with plunger shaft, and the other end communicates with air inlet air flue.Engine high-efficiency admission gear of the present invention eliminates traditional valve spring, additionally it is pressurized in valve uphill process and during falling after rise, charge energy is stored in valve-closing, the fullness coefficient of cam can be increased and reduce pumping loss, so as to effectively improve engine charging efficiency.In addition, the present invention is simple and compact for structure, be advantageous to engineering application.
Description
Technical field
The invention belongs to technical field of engines, more particularly, to a kind of efficient admission gear.
Background technology
Internal combustion engine is still the maximum prime mover of thermal efficiency highest, unit volume and power-weight ratio so far, and application is non-
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
Strict oil consumption standard and Abgasgesetz.
The valve of conventional engines all carries valve preloading spring, and this causes the valve mechanism of engine designs to consider to transport
It is dynamic to learn design and stress design, avoid causing valve to fly off because rotating speed is too high and causing cam wear because contact stress is excessive
Destroy.In addition, conventional engines intake pressure wave is pulsation, i.e., when engine intake valve is opened, air-flow initially enters
In cylinder；When engine intake valve is closed, a part of air-flow is reflected back again, causes charge energy to consume.
How to ensure to improve the fullness coefficient of cam while valve mechanism reliability as far as possible at high speed and make
Air inlet has certain continuity to improve the charging efficiency of engine, and then optimizes combustion process lifting engine performance, turns into
The tireless pursuit of engine designers
The content of the invention
In view of this, the present invention is directed to propose a kind of engine high-efficiency admission gear, to realize higher cam fullness coefficient
And bigger charging efficiency.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of engine high-efficiency admission gear, including camshaft, at least one end is connected with cam for it, and cam is surrounded on cam
Axle is provided with guide groove；Piston bush, the inside of its one end have been in axial sliding connection piston, the outer end of piston and the foreign steamer of cam along it
Wide wall offsets；The other end of piston bush is connected with cylinder head, and extraneous air inlet air flue is connected provided with both ends in cylinder head；Piston bush
Inside, the part between piston and cylinder head is plunger shaft；Valve stem, it passes through cylinder head and piston, and along piston bush
Axially it is slidably connected with both；One end of valve stem is stretched into guide groove, and the other end is connected with valve, valve control air inlet air flue
Wherein one end folding；The passage of connection plunger shaft and air inlet air flue is additionally provided with valve stem.
Further, the guide groove is located at the root of the camshaft；The outline projection peak of the cam is with leading
It is corresponding to the base circle portion of groove.
Further, the both ends of the camshaft have been respectively and fixedly connected with a cam, and the valve stem is located at two cams
Between；The end of valve stem is connected with the guiding quarter butt of a T-shape, and the end for being oriented to the vertical one end of quarter butt and valve stem is consolidated
Connect, horizontal both ends are rotatably connected to a roller respectively, and two rollers are respectively placed in the guide groove of two cams.
Further, valve clearance is provided between the roller and the guide groove.
Further, the cross-sectional area of the piston is more than the cross-sectional area of the valve.
Further, the piston, valve stem, valve and piston bush are coaxial.
Relative to prior art, engine high-efficiency admission gear of the present invention has the advantage that：
Engine high-efficiency admission gear of the present invention, it is simple and compact for structure, be advantageous to engineering application.Pass through cancellation
Traditional valve spring, the contact stress between cam and valve can be effectively reduced, so as to improve the acceleration of cam,
Increase the fullness coefficient of cam.In addition, the present invention can be additionally pressurized in valve uphill process and during falling after rise,
And charge energy can be effectively stored in valve-closing, finally realize the raising of engine charging efficiency.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 be the embodiment of the present invention described in engine high-efficiency admission gear be in valve be by the main view of opening to
Sectional view；
Fig. 2 be engine high-efficiency admission gear described in the embodiment of the present invention be in the main view of valve maximum lift state to
Sectional view；
Fig. 3 is that the engine high-efficiency admission gear described in the embodiment of the present invention be in the main view of valve falling state to section view
Figure；
Fig. 4 be the embodiment of the present invention described in engine high-efficiency admission gear be in valve be by the main view of closed mode to
Sectional view；
Fig. 5 is the front view that the cam of the engine high-efficiency admission gear described in the embodiment of the present invention is engaged with roller；
Fig. 6 be Fig. 5 in A-A to sectional view.
Description of reference numerals：
1- cams；101- camshafts；2- pistons；3- piston bush；4- plunger shafts；5- cylinder head；6- valves；601- valves
Bar；602- is oriented to quarter butt；7- air inlet air flues；701- chamferings；8- passages；9- rollers；10- guide grooves.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Such as Fig. 1-6, the present invention proposes a kind of engine high-efficiency admission gear, including camshaft 101, and at least one end is affixed for it
There is a cam 1, guide groove 10 is provided with around camshaft 101 on cam 1；Piston bush 3, the inside of its one end are in axial sliding connection along it
There is piston 2, the outer end of piston 2 offsets with the outline wall of cam 1；The other end of piston bush 3 is connected with cylinder head 5, cylinder head 5
The interior air inlet air flue 7 extraneous provided with both ends connection；The inside of piston bush 3, the part between piston 2 and cylinder head 5 are plunger shaft
4；Valve stem 601, it passes through cylinder head 5 and piston 2, and is slidably connected along the axial direction of piston bush 3 with both；Valve stem 601
One end is stretched into guide groove 10, and the other end is connected with valve 6, and valve 6 controls the wherein one end folding of air inlet air flue 7；Valve stem 601
On be additionally provided with connection plunger shaft 4 and air inlet air flue 7 passage 8.
Piston 2 can slide along gap above and below the inwall of piston bush 3.Valve stem 601 respectively with cylinder head 5 and the gap of piston 2
It is slidably matched.The outline wall of cam 1 contacts with the outer end (one end for deviating from plunger shaft 4) of piston 2, defines piston 2 most
High position.
Above-mentioned guide groove 10 is located at the root of above-mentioned camshaft 101；The outline projection peak of above-mentioned cam 1 is with being oriented to
The base circle portion of groove 10 is corresponding.The structure make it that valve 6 is complete during the volume of plunger shaft 4 is changed into minimum from maximum
Into once by being closed into unlatching again to the process of closure.Afterwards, valve 6 is kept closed, until the volume of plunger shaft 4 is by most
It is small to return to maximum.
The both ends of above-mentioned camshaft 101 have been respectively and fixedly connected with an above-mentioned cam 1, and above-mentioned valve stem 601 is located at two cams 1
Between；The end of valve stem 601 is connected with the guiding quarter butt 602 of a T-shape, is oriented to the vertical one end of quarter butt 602 and valve
The end of bar 601 is affixed, and horizontal both ends are rotatably connected to a roller 9 respectively, and two rollers 9 are respectively placed in two cams 1
Above-mentioned guide groove 10 in.
Valve clearance is provided between above-mentioned rollers 9 and above-mentioned guide groove 10.On the one hand the structure can avoid valve 6 from being heated swollen
It is swollen to be opened by the top of cam 1；On the other hand can avoid stuck between roller 9 and the guide groove 10.
The cross-sectional area of above-mentioned piston 2 is more than the cross-sectional area of above-mentioned valve 6.
Above-mentioned piston 2, valve stem 601, valve 6 and piston bush 3 are coaxial.
It is above-mentioned that chamfering 701 is provided with the port of air inlet air flue 7 of the outer end of cylinder head 5；The sidewall slope of above-mentioned valve 6 is set
Put, and be engaged with chamfering 701.
The course of work of the present invention is as follows：
Such as Fig. 1, when initial, the volume of plunger shaft 4 is maximum rating.Roller 9 is located in guide groove 10 (cam annular groove)
Base circle portion, the base circle portion of cam 1 and the outer end in contact of piston 2.Now, guide groove 10 is not provided to roller 9 and acted on downwards
Power.Meanwhile one side engine booster air-flow passes sequentially through air inlet air flue 7 and passage 8 enters plunger shaft 4, due to the horizontal stroke of piston 2
Area of section is more than the cross-sectional area of valve 6, and the engine booster air-flow active force upward to piston 2 is more than engine booster
The air-flow active force downward to valve 6；High pressure draught in another aspect engine cylinder also produces upward effect to valve 6
Power, therefore valve 6 is closure (port of closure air inlet air flue 7) state.
Such as Fig. 2, as cam 1 rotates, roller 9 enters the bossing of guide groove 10, and the way roller 9 of guide groove 10 applies
Down force, band piston 2 and valve 6 are moved down, and valve 6 is opened.Due to eliminating traditional valve spring, guide groove
10th, the acceleration of piston 2 and valve 6 can be bigger, it is possible to achieve bigger fullness coefficient, is advantageous to high speed air inlet.Valve 6 is opened
During opening, the bossing of the outline of cam 1 gradually contacts with piston 2, and promotes piston 2 to move down so that plunger shaft 4
Volume be gradually reduced.Gas in plunger shaft 4 is entered in air inlet air flue 7 and cylinder by passage 8, to realize
Valve 6 realizes rapid air inlet when just opening, so as to effectively reduce pumping loss.
Such as Fig. 3, with being rotated further for cam 1, roller 9 moves from the bossing of guide groove 10 to base circle portion, gas
Door 6 gradually tends to close.In the process, the outline bossing of cam 1 continues, close to piston 2, plunger shaft 4 to be continued to press
Contracting.Gas in plunger shaft 4 also continues to enter in air inlet air flue 7 and cylinder by passage 8, is fallen after rise in valve 6
Engine can be still pressurized in journey, so as to further improve air inlet ability.
Such as Fig. 4, with being rotated further for cam 1, roller 9 enters the base circle portion of guide groove 10, and valve 6 closes completely
Close.Now, the outer end in contact of the outline bossing of cam 1 and piston 2, the volume of plunger shaft 4 reach minimum.
With being rotated further for cam 1, the outline bossing of cam 1 increases away from piston 2, the volume of plunger shaft 4 again
Greatly, engine booster air-flow is entered in plunger shaft 4 by air inlet air flue 7, passage 8, is prepared to enter into next circulation.
The present invention realizes engine continuous air inlet, effectively reduces the pulsation effect of intake pressure wave.
Engine high-efficiency admission gear of the present invention, it is simple and compact for structure, be advantageous to engineering application.Pass through cancellation
Traditional valve spring, the contact stress between cam 1 and valve 6 can be effectively reduced, so as to improve the acceleration of cam 1
Degree, increase the fullness coefficient of cam 1.In addition, the present invention can be carried out extra in the uphill process of valve 6 and during falling after rise
Supercharging, and charge energy can be effectively stored when valve 6 is closed, finally realize the raising of engine charging efficiency.
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
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
- A kind of 1. engine high-efficiency admission gear, it is characterised in that including：Camshaft (101), its at least one end are connected with cam (1), guide groove are provided with around camshaft (101) on cam (1) (10)；Piston bush (3), the inside of its one end have been in axial sliding connection piston (2), outer end and the cam (1) of piston (2) along it Outline wall offsets；The other end of piston bush (3) is connected with cylinder head (5), and entering for the both ends connection external world is provided with cylinder head (5) Gas air flue (7)；The inside of piston bush (3), the part between piston (2) and cylinder head (5) are plunger shaft (4)；Valve stem (601), it passes through cylinder head (5) and piston (2), and is slidably connected along the axial direction of piston bush (3) with both；Gas One end of door rod (601) is stretched into guide groove (10), and the other end is connected with valve (6), valve (6) control air inlet air flue (7) its Middle one end folding；The passage (8) of connection plunger shaft (4) and air inlet air flue (7) is additionally provided with valve stem (601).
- 2. engine high-efficiency admission gear according to claim 1, it is characterised in that：The guide groove (10) is located at described The root of camshaft (101)；The outline projection peak of the cam (1) is corresponding with the base circle portion of guide groove (10).
- 3. engine high-efficiency admission gear according to claim 2, it is characterised in that：The both ends of the camshaft (101) A cam (1) is respectively and fixedly connected with, the valve stem (601) is between two cams (1)；The end of valve stem (601) Portion is connected with the guiding quarter butt (602) of a T-shape, is oriented to the vertical one end of quarter butt (602) and the end of valve stem (601) is consolidated Connect, horizontal both ends are rotatably connected to a roller (9) respectively, and two rollers (9) are respectively placed in two the described of cam (1) and led In to groove (10).
- 4. engine high-efficiency admission gear according to claim 3, it is characterised in that：The roller (9) and the guiding Valve clearance is provided between groove (10).
- 5. according to the engine high-efficiency admission gear described in claim any one of 1-4, it is characterised in that：The piston (2) Cross-sectional area is more than the cross-sectional area of the valve (6).
- 6. engine high-efficiency admission gear according to claim 5, it is characterised in that：The piston (2), valve stem (601), valve (6) and piston bush (3) are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710938783.1A CN107701258B (en) | 2017-09-30 | 2017-09-30 | A kind of engine high-efficiency admission gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710938783.1A CN107701258B (en) | 2017-09-30 | 2017-09-30 | A kind of engine high-efficiency admission gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107701258A true CN107701258A (en) | 2018-02-16 |
| CN107701258B CN107701258B (en) | 2019-06-25 |
Family
ID=61183487
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710938783.1A Active CN107701258B (en) | 2017-09-30 | 2017-09-30 | A kind of engine high-efficiency admission gear |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590797A (en) * | 2018-03-05 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of high-speed diesel engine combined type valve and its driving mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217043A (en) * | 1996-05-02 | 1999-05-19 | 日锻汽门株式会社 | Spark plug function Integrated engine valve and valve train |
| CN100410573C (en) * | 2004-04-01 | 2008-08-13 | 株式会社小松制作所 | Valve device |
| CN102966397A (en) * | 2012-11-15 | 2013-03-13 | 上海交通大学 | Pressure differential contact point moving system |
| CN103939170A (en) * | 2014-03-07 | 2014-07-23 | 同济大学 | Controllable valve mechanism used for two-stroke free piston engine-electric generator system |
| WO2014195569A1 (en) * | 2013-06-05 | 2014-12-11 | Wärtsilä Finland Oy | Gas exchange valve arrangement |
-
2017
- 2017-09-30 CN CN201710938783.1A patent/CN107701258B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217043A (en) * | 1996-05-02 | 1999-05-19 | 日锻汽门株式会社 | Spark plug function Integrated engine valve and valve train |
| CN100410573C (en) * | 2004-04-01 | 2008-08-13 | 株式会社小松制作所 | Valve device |
| CN102966397A (en) * | 2012-11-15 | 2013-03-13 | 上海交通大学 | Pressure differential contact point moving system |
| WO2014195569A1 (en) * | 2013-06-05 | 2014-12-11 | Wärtsilä Finland Oy | Gas exchange valve arrangement |
| CN103939170A (en) * | 2014-03-07 | 2014-07-23 | 同济大学 | Controllable valve mechanism used for two-stroke free piston engine-electric generator system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590797A (en) * | 2018-03-05 | 2018-09-28 | 中国北方发动机研究所(天津) | A kind of high-speed diesel engine combined type valve and its driving mechanism |
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| Publication number | Publication date |
|---|---|
| CN107701258B (en) | 2019-06-25 |
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