CN107701258B - A kind of engine high-efficiency admission gear - Google Patents
A kind of engine high-efficiency admission gear Download PDFInfo
- Publication number
- CN107701258B CN107701258B CN201710938783.1A CN201710938783A CN107701258B CN 107701258 B CN107701258 B CN 107701258B CN 201710938783 A CN201710938783 A CN 201710938783A CN 107701258 B CN107701258 B CN 107701258B
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- piston
- valve
- cam
- efficiency
- guide groove
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The present invention provides a kind of engine high-efficiency admission gears, including cam, piston bush, piston, cylinder head and valve；Plunger shaft is surrounded between piston bush inner wall and piston bottom end and cylinder head top；Piston tip is equipped with idler wheel, is equipped with the guide groove of a circle inverted T-shape inside cam along direction of rotation, and idler wheel is worked in coordination with guide groove, and outer profile and the piston of cam are worked in coordination；Channel is equipped with inside valve stem, which communicates with plunger shaft, and the other end is communicated with air inlet air flue.Engine high-efficiency admission gear of the present invention eliminates traditional valve spring, it is additionally pressurized during valve uphill process and falling, charge energy is stored in valve-closing, the fullness coefficient of cam can be increased and reduces pumping loss, to effectively improve engine volumetric efficiency.In addition, the configuration of the present invention is simple is compact, be conducive to engineering application.
Description
Technical field
The invention belongs to technical field of engines, more particularly, to a kind of efficient admission gear.
Background technique
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 gradually shortage and the continuous deterioration of environmental resource of world energy sources, it would be desirable to which internal combustion engine meets more
Stringent oil consumption standard and emission regulation.
The valve of conventional engines all has valve preloading spring, this, which designs the valve mechanism of engine, will consider to transport
It is dynamic to learn design and stress design, it avoids causing valve to fly off because revolving speed is excessively high and leading to cam wear because contact stress is excessive
It destroys.In addition to this, conventional engines intake pressure wave is pulsation, i.e., when engine intake valve is opened, air-flow is initially entered
In cylinder；When engine intake valve is closed, a part of air-flow is reflected back again, and charge energy is caused to be consumed.
How to guarantee 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 volumetric efficiency of engine, and then optimizes combustion process and promote engine performance, becomes
The tireless pursuit of engine designers
Summary 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 volumetric efficiency.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of engine high-efficiency admission gear, including camshaft, at least one end are connected with cam, surround cam on cam
Axis is equipped with guide groove；The inside of piston bush, one end has 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 the extraneous air inlet air flue of connection is equipped in cylinder head；Piston bush it is interior
Portion, the part between piston and cylinder head are plunger shaft；Valve stem passes through cylinder head and piston, and along the axial direction of piston bush
It is slidably connected with the two；One end of valve stem is protruded into guide groove, and the other end is connected with valve, and valve controls air inlet air flue wherein
One end folding；The channel of connection plunger shaft and air inlet air flue is additionally provided on valve stem.
Further, the guide groove is set to the root of the camshaft；The outer profile protrusion highest point of the cam with lead
Base circle portion to slot is corresponding.
Further, the both ends of the camshaft have been respectively and fixedly connected with the cam, and the valve stem is located at two cams
Between；The end of valve stem is connected with the guiding quarter butt an of T-shape, and the end of guiding quarter butt vertical one end and valve stem is solid
It connects, horizontal both ends are rotatably connected to an idler wheel respectively, and two idler wheels are respectively placed in the guide groove of two cams.
Further, valve clearance is equipped between the idler wheel and the guide groove.
Further, the cross-sectional area of the piston is greater than the cross-sectional area of the valve.
Further, the piston, valve stem, valve and piston bush are coaxial.
Compared with the existing technology, 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 conducive to engineering application.Pass through cancellation
The contact stress between cam and valve can be effectively reduced in traditional valve spring, so as to improve the acceleration of cam,
Increase the fullness coefficient of cam.In addition to this, the present invention can be additionally pressurized during valve uphill process and falling,
And charge energy can be effectively stored in valve-closing, the final raising for realizing engine volumetric efficiency.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations 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 open state to
Cross-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
Cross-sectional view；
Fig. 3 is that 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 state to
Cross-sectional view；
Fig. 5 is the main view that the cam of engine high-efficiency admission gear described in the embodiment of the present invention is matched with idler wheel；
Fig. 6 be Fig. 5 in A-A to cross-sectional view.
Description of symbols:
1- cam；101- camshaft；2- piston；3- piston bush；4- plunger shaft；5- cylinder head；6- valve；601- valve
Bar；602- is oriented to quarter butt；7- air inlet air flue；701- chamfering；The channel 8-；9- idler wheel；10- guide groove.
Specific embodiment
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, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the 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 explicitly or implicitly include one or more of the features.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
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
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.
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
There is cam 1, surrounds camshaft 101 on cam 1 and be equipped with guide groove 10；The inside of piston bush 3, one end is in axial sliding connection along it
There is piston 2, the outer end of piston 2 offsets with the outer profile wall of cam 1；The other end of piston bush 3 is connected with cylinder head 5, cylinder head 5
It is interior to be equipped with the extraneous air inlet air flue 7 of connection；The inside of piston bush 3, the part between piston 2 and cylinder head 5 are plunger shaft 4；Gas
Door rod 601 passes through cylinder head 5 and piston 2, and is slidably connected along the axial direction of piston bush 3 and the two；One end of valve stem 601
It protrudes into guide groove 10, the other end is connected with valve 6, and valve 6 controls air inlet air flue 7, and wherein one end opens and closes；On valve stem 601 also
Channel 8 equipped with connection plunger shaft 4 and air inlet air flue 7.
Piston 2 can be slided along the inner wall upper and lower gap of piston bush 3.Valve stem 601 respectively with 2 gap of cylinder head 5 and piston
It is slidably matched.The outer profile wall of cam 1 is contacted with the outer end (away from one end of plunger shaft 4) of piston 2, defines piston 2 most
High position.
Above-mentioned guide groove 10 is set to the root of above-mentioned camshaft 101；The outer profile protrusion highest point of above-mentioned cam 1 and guiding
The base circle portion of slot 10 is corresponding.The structure makes during the volume of plunger shaft 4 becomes the smallest from maximum, and valve 6 is complete
At once by being closed into unlatching again to the process of closure.Later, valve 6 is kept closed, until the volume of plunger shaft 4 is by most
It is small to be restored 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 an of T-shape, guiding quarter butt 602 vertical one end and valve
The end of bar 601 is affixed, and horizontal both ends are rotatably connected to an idler wheel 9 respectively, and two idler wheels 9 are respectively placed in two cams 1
Above-mentioned guide groove 10 in.
Valve clearance is equipped between above-mentioned rollers 9 and above-mentioned guide groove 10.The avoidable valve 6 of structure one side is heated swollen
It is swollen to be opened by cam 1；On the other hand it can avoid stuck between idler wheel 9 and the guide groove 10.
The cross-sectional area of above-mentioned piston 2 is greater 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 equipped at 7 port of air inlet air flue of 5 outer end of cylinder head；The sidewall slope of above-mentioned valve 6 is set
It sets, and is matched with chamfering 701.
The course of work of the invention is as follows:
Such as Fig. 1, when initial, the volume of plunger shaft 4 is maximum rating.Idler wheel 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.It is acted on downwards at this point, guide groove 10 is not provided to idler wheel 9
Power.Meanwhile one side engine booster air-flow passes sequentially through air inlet air flue 7 and channel 8 enters plunger shaft 4, due to the cross of piston 2
Area of section is greater than the cross-sectional area of valve 6, and the engine booster air-flow active force upward to piston 2 is greater than engine booster
The air-flow active force downward to valve 6；High pressure draught in another aspect engine cylinder also generates upward effect to valve 6
Power, therefore valve 6 is closure (port for blocking air inlet air flue 7) state.
Such as Fig. 2, as cam 1 rotates, idler wheel 9 enters the convex portion of guide groove 10, and 10 way roller 9 of guide groove applies
Down force, band piston 2 and valve 6 move down, and valve 6 is opened.Due to eliminating traditional valve spring, guide groove
10, the acceleration of piston 2 and valve 6 can be bigger, and bigger fullness coefficient may be implemented, be conducive to high speed air inlet.Valve 6 is opened
During opening, the convex portion of 1 outer profile of cam is gradually contacted with piston 2, and piston 2 is pushed 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 channel 8, to realize
Valve 6 realizes rapid air inlet when just opening, so that pumping loss be effectively reduced.
Such as Fig. 3, with continuing to rotate for cam 1, idler wheel 9 is mobile from the convex portion of guide groove 10 to base circle portion, gas
Door 6 gradually tends to be closed.In the process, the outer profile convex portion of cam 1 continues to continue to press to plunger shaft 4 close to piston 2
Contracting.Gas in plunger shaft 4 also continues through channel 8 and enters in air inlet air flue 7 and cylinder, falls after rise in valve 6
Engine can be still pressurized in journey, to further increase air inlet ability.
Such as Fig. 4, with continuing to rotate for cam 1, idler wheel 9 enters the base circle portion of guide groove 10, and valve 6 closes completely
It closes.At this point, the outer end in contact of the outer profile convex portion of cam 1 and piston 2, the volume of plunger shaft 4 reaches minimum.
With continuing to rotate for cam 1, again far from piston 2, the volume of plunger shaft 4 increases the outer profile convex portion of cam 1
Greatly, engine booster air-flow is entered in plunger shaft 4 by air inlet air flue 7, channel 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 conducive to engineering application.Pass through cancellation
The contact stress between cam 1 and valve 6 can be effectively reduced in traditional valve spring, so as to improve the acceleration of cam 1
Degree increases the fullness coefficient of cam 1.In addition to this, the present invention can carry out additional during 6 uphill process of valve and falling
Pressurization, and charge energy can be effectively stored when valve 6 is closed, the final raising for realizing engine volumetric efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of engine high-efficiency admission gear characterized by comprising
Camshaft (101), both ends have been respectively and fixedly connected with a cam (1), have set on cam (1) around the root of camshaft (101)
There are guide groove (10)；The outer profile protrusion highest point of the cam (1) is corresponding with the base circle portion of guide groove (10)；
The inside of piston bush (3), one end has been in axial sliding connection piston (2) along it, outer end and cam (1) of piston (2)
Outer profile wall offsets；The other end of piston bush (3) is connected with cylinder head (5), and the extraneous air inlet gas of connection is equipped in cylinder head (5)
Road (7)；The inside of piston bush (3), the part between piston (2) and cylinder head (5) are plunger shaft (4)；
Valve stem (601) passes through cylinder head (5) and piston (2), and is slidably connected along the axial direction of piston bush (3) and the two；Institute
Valve stem (601) are stated between two cams (1)；One end of valve stem (601) is protruded into guide groove (10), and the other end is affixed
Have valve (6), valve (6) controls air inlet air flue (7), and wherein one end opens and closes；Connection plunger shaft (4) is additionally provided on valve stem (601)
With the channel (8) of air inlet air flue (7)；
The end of valve stem (601) is connected with the guiding quarter butt (602) an of T-shape, the vertical one end of guiding quarter butt (602) with
The end of valve stem (601) is affixed, and horizontal both ends are rotatably connected to an idler wheel (9) respectively, and two idler wheels (9) are respectively placed in
In the guide groove (10) of two cams (1).
2. engine high-efficiency admission gear according to claim 1, it is characterised in that: the idler wheel (9) and the guiding
Valve clearance is equipped between slot (10).
3. engine high-efficiency admission gear according to claim 1, it is characterised in that: the cross section face of the piston (2)
Product is greater than the cross-sectional area of the valve (6).
4. engine high-efficiency admission gear according to claim 1, 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 |
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| Publication Number | Publication Date |
|---|---|
| CN107701258A CN107701258A (en) | 2018-02-16 |
| CN107701258B true CN107701258B (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710938783.1A Active CN107701258B (en) | 2017-09-30 | 2017-09-30 | A kind of engine high-efficiency admission gear |
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| CN (1) | CN107701258B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590797B (en) * | 2018-03-05 | 2020-02-07 | 中国北方发动机研究所(天津) | High-speed diesel engine combined valve and driving mechanism thereof |
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 incorporated engine valve and valve mechanism |
| 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 incorporated engine valve and valve mechanism |
| 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 |
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| Publication number | Publication date |
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| CN107701258A (en) | 2018-02-16 |
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