CN206071668U - A kind of variable valve actuator for air - Google Patents
A kind of variable valve actuator for air Download PDFInfo
- Publication number
- CN206071668U CN206071668U CN201621072016.4U CN201621072016U CN206071668U CN 206071668 U CN206071668 U CN 206071668U CN 201621072016 U CN201621072016 U CN 201621072016U CN 206071668 U CN206071668 U CN 206071668U
- Authority
- CN
- China
- Prior art keywords
- tappet
- oil
- push rod
- valve
- actuating push
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of variable valve actuator for air, including tappet, tappet overcoat, valve actuating push rod and cam；Tappet overcoat is hollow cylindrical structure, and its inner surface is slidably matched with tappet outer surface；Cam is arranged on directly over tappet；Tappet seat is additionally provided with, upper end is connected with tappet inside upper surface, lower end is slidably matched with valve actuating push rod inner surface top；Valve actuating push rod is internally provided with the return spring coordinated with its inner surface, and spring stop is provided with above return spring；Added lift chamber is constituted between spring stop, tappet seat and valve actuating push rod；Tappet overcoat inner surface, between valve actuating push rod outer surface, tappet inner surface and tappet seat, constitute closed pumping cavity；This utility model need not be additionally provided high-pressure fuel supply system, and hydraulic oil oil supply system is simple, can carry out dynamic regulation to valve added lift as needed, and this utility model is based on frame for movement, corresponding rapid, the good reliability of mechanism, added lift control logic is simple, and staking-out work amount is little.
Description
Technical field
This utility model is related to I. C engine distribution mechanism, and in particular to a kind of variable valve actuator for air.
Background technology
, using the mechanical drive mode of actuated by cams valve, the keying characteristic of valve is very for the traditional valve actuating mechanism of electromotor
Depend on the motion molded line of cam in big degree, and the design of cam motion molded line depend primarily on each operating mode rotating speed of electromotor,
The equilibrium valve of load aggregative indicator, its performance can only meet the demand of engine portion divided working status, the such as dynamic property or height of underload
The fuel economy of load, and the demand of full working scope can not be met.
Utility model content
This utility model provides a kind of variable valve actuator for air that can realize continuously adjusting and controlling valve timing and lift.
Originally the technical scheme of new employing is：A kind of variable valve actuator for air, including tappet, tappet overcoat, valve actuating push rod and
Cam；Cylindrical structure of the tappet for lower hollow structure, tappet overcoat are hollow cylindrical structure, outside its inner surface and tappet
Surface is slidably matched；Cam is arranged on directly over tappet；Cylindrical structure of the valve actuating push rod for upper hollow；It is additionally provided with tappet
Seat, upper end are connected with tappet inside upper surface, and lower end is slidably matched with valve actuating push rod inner surface top；Arrange inside valve actuating push rod
There is the return spring coordinated with its inner surface, above return spring, be provided with spring stop；Spring stop, tappet seat and valve are pushed away
Added lift chamber is constituted between bar；Oil scraper ring is provided between tappet overcoat and valve actuating push rod, tappet overcoat inner surface, valve are pushed away
Closed pumping cavity is constituted between rod outer surface, tappet inner surface and tappet seat；Pumping cavity is connected with added lift chamber；Tappet overcoat
On be provided with connection oil supply system pipeline oil-in and oil return opening；The oil-feed of connection oil-in and pumping cavity is provided with tappet
Oil duct；The oil return oil duct of connection added lift chamber and oil return opening is provided with tappet；Connection oil return oil duct is provided with tappet
Pressure limiting oil duct, arranges limited valve on pressure limiting oil duct.
Further, in line check valve is provided between the pumping cavity and added lift chamber.
Further, the tappet seat is that mid diameter is big, three little rank cylindrical structures of two ends diameter；From top to bottom
The cylinder groove that single order cylinder is arranged with tappet inside upper surface is engaged, from top to bottom in the 3rd rank cylinder and valve actuating push rod
Surface is engaged.
Further, between the spring stop and tappet seat, on valve actuating push rod, it is provided with thrust block.
Further, the oil scraper ring is fixedly connected with tappet overcoat by Positioning screw.
Further, the tappet seat second-order cylindrical outer surface is provided with annular oil groove, annular oil groove diametric(al)
On be provided with horizontal oil duct, be provided with vertical oil duct on tappet seat axial direction, constitute the oil duct of T-shaped；T-shaped oil duct connect pumping cavity and
Added lift chamber.
Further, the tappet direction of motion is provided with length of two not connected and two ends for arc-shaped on the tappet
Oil groove；One of connection oil-in and oil-feed oil duct；Another connection oil return opening and oil return oil duct.
Further, the oil scraper ring is hollow circular cylinder structure.
The beneficial effects of the utility model are：
(1) this utility model oil-feed and force feed need not be additionally provided high-pressure fuel supply system all by completing in itself, and hydraulic oil is supplied
Oil system is simple, popularization is good；
(2) this utility model can design the ratio of pumping cavity and added lift cavity area as needed, additional to valve
Lift carries out dynamic regulation, face amount when maximizing valve lift curve；
(3) this utility model does not change valve, cam mechanism and cam drive, for changing for traditional immutable mechanism
Dynamic design efforts would is little, it is easy to promotion and implementation；
(4), mainly based on frame for movement, the response of mechanism is rapid, good reliability for this utility model, added lift control
Logic is simple, and staking-out work amount is little.
Description of the drawings
Fig. 1 is this utility model structural representation.
In figure：1- valve actuating push rods, 2- tappet overcoats, 3- Positioning screws, 4- oil scraper rings, 5- hydraulic pressure oil sumps, 6- enter electromagnetic oil
Valve, 7- oil-ins, 8- oil-feed oil ducts, 9- in line check valves, 10- tappets, 11- cams, 12- pressure limiting valves, 13- pressure limiting oil ducts, 14-
Oil return oil duct, 15- oil return openings, 16- oil return solenoid valves, 17- tappet seats, 18- pumping cavities, 19- thrust blocks, 20- added lifts chamber,
21- spring stops, 22- return springs.
Specific embodiment
This utility model is described further with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of variable valve actuator for air, including tappet 10, tappet overcoat 2, valve actuating push rod 1 and cam 11；Very
Cylindrical structure of the post 10 for lower hollow structure, tappet overcoat 2 are hollow cylindrical structure, its inner surface and 10 appearance of tappet
Face is slidably matched；Cam 11 is arranged on directly over tappet 10；Cylindrical structure of the valve actuating push rod 1 for upper hollow；It is additionally provided with
Tappet seat 17, upper end are connected with 10 inside upper surface of tappet, and lower end is slidably matched with 1 inner surface top of valve actuating push rod；Valve is pushed away
Bar 1 is internally provided with the return spring 22 coordinated with its inner surface, and spring stop 21 is provided with above return spring 22；Spring catch
Added lift chamber 20 is constituted between plate 21, tappet seat 17 and valve actuating push rod 1；Gear is provided between tappet overcoat 2 and valve actuating push rod 1
Oil ring 4, constitutes closed force feed between 2 inner surface of tappet overcoat, 1 outer surface of valve actuating push rod, 10 inner surface of tappet and tappet seat 17
Chamber 18；Pumping cavity 18 is connected with added lift chamber 20；7 He of oil-in of connection oil supply system pipeline is provided with tappet overcoat 2
Oil return opening 15；The oil-feed oil duct 8 of connection oil-in 7 and pumping cavity 18 is provided with tappet 10；Connection is provided with tappet 10 attached
Plus the oil return oil duct 14 of lift chamber 20 and oil return opening 15；The pressure limiting oil duct 13 of connection oil return oil duct 14, limit are provided with tappet 10
Force feed arranges limited valve 12 on road 13.
Further, in line check valve 9 is provided between the pumping cavity 18 and added lift chamber 20；It is unidirectional that oil-feed is set
Valve 9 may insure that hydraulic oil enters added lift chamber 20 without there is adverse current from pumping cavity 18.
Further, the tappet seat 17 is that mid diameter is big, three little rank cylindrical structures of two ends diameter；From top to bottom
The cylinder groove that first rank cylinder is arranged with 10 inside upper surface of tappet is engaged, and the 3rd rank cylinder is pushed away with valve from top to bottom
It is engaged above 1 inner surface of bar；When installing and using, tappet seat 7, valve actuating push rod 1 and tappet 10 keep coaxial, and this structure is caused
Its cooperation is more stable；10 bottom of tappet cuts out two cylinders coaxial from tappet 10 but that diameter is different, forms "convex" shaped
Cylindrical cavity；First rank cylinder is engaged tappet seat 17 with the small column groove inside tappet 10 from top to bottom, and top surface with it is little
The top surface laminating of cylinder groove；17 bottom periphery of tappet seat forms sealing surface with the inner surface of 1 cylindrical cavity of valve actuating push rod.
Further, between the spring stop 21 and tappet seat 17, on valve actuating push rod 1, it is provided with thrust block 19；Can be with
The distance of the movement of limited spring baffle plate 21, it is ensured that the volume in added lift chamber 20；21 outer surface of spring stop is justified with valve actuating push rod 1
Post inner cavity surface forms sealing surface.
Further, the tappet overcoat 2 is hollow cylindrical structure, and oil scraper ring 4 is by Positioning screw 3 and tappet overcoat
2 are fixedly connected；Tappet overcoat 2 keeps coaxial with tappet 10, and 10 outer surface of tappet forms sealing surface with 2 inner surface of tappet overcoat.
Further, 17 second-order cylindrical outer surface of the tappet seat is provided with annular oil groove, annular oil groove diameter side
Horizontal oil duct has been set up, vertical oil duct on 17 axial direction of tappet seat, has been provided with, the oil duct of T-shaped has been constituted；T-shaped oil duct connection force feed
Chamber 18 and added lift chamber 20.
Further, it is arc-shaped 10 direction of motion of tappet to be provided with two not connected and two ends on the tappet 10
Long oil groove；One of connection oil-in 7 and oil-feed oil duct 8；Another connection oil return opening 15 and oil return oil duct 14；Length is set
Oil groove may insure tappet 10 in case of motion by the oil-in 7 on long oil groove and tappet overcoat 2,15 phase of oil return opening
It is logical；Oil-feed oil duct 18 and oil return oil duct 14 are respectively provided with the top of long oil groove；Oil supply system is connected by oil-feed oil duct 8 with pumping cavity 18
Logical, oil return system is connected by oil return oil duct 14 with added lift chamber 20.
Further, the oil scraper ring 4 is hollow circular cylinder structure, keeps coaxial with tappet 10；Arrange on tappet overcoat 2
There is screwed hole, 4 outer surface of oil scraper ring is provided with and 2 identical screwed hole of tappet overcoat, by Positioning screw 3 and tappet overcoat 2
It is connected；4 outer surface of oil scraper ring forms sealing surface with 2 inner surface of tappet overcoat；The inner surface of oil scraper ring 4 is outer with valve actuating push rod 1
Surface forms sealing surface.
During use, tappet 10, tappet overcoat 2, tappet seat 17, oil scraper ring 4 and valve actuating push rod 1 keep coaxial；With oil-in 7
It is provided with the oil supply system pipeline of connection into solenoid 6, is provided with back on the oil supply system pipeline being connected with oil return opening 15
Solenoid 16.
During use, the pressure limiting value calculating method of pressure limiting valve 12 is as follows：
Fk=k (L+ Δ l)=P0S is
P0=k (L+ Δ l)/s
In formula：Rigidity of the k for valve spring, Δ l are valve maximum added lift, and s is that valve is pushed away in added lift chamber 20
The lifting surface area of bar 1, L are valve original lift, FkFor spring force of the total lift of valve when maximum, P0For the voltage limiting value of pressure limiting valve 12；
During use, the voltage limiting value of pressure limiting valve 12 is only needed to be slightly larger than P0.
Enter solenoid 6 to open, oil return solenoid valve 16 is closed, hydraulic oil well oil feeding system and oil-feed oil duct 8 and pumping cavity
18 communicate；When tappet 10 is moved upwards with cam 11, as tappet overcoat 2 and oil scraper ring 4 are fixed, so pumping cavity 18
Volume V1Increase with the up of tappet 10, oil pressure p1Reduce, hydraulic oil is full of whole pumping cavity 18, enters solenoid 6 and closes
Close；When cam promotes tappet 10 descending and hydraulic oil in " extruding " pumping cavity 18, the volume V of pumping cavity 181Reduce, oil pressure p1
Increase, hydraulic oil Jing in line check valves 9 and "T"-shaped oil duct enter added lift chamber 20, and hydraulic oil is pushed away under fluid power effect first
Dynamic spring stop 21, overcomes 22 pretightning force of return spring, and then push the spring baffle plate exercises valve actuating push rod 1 and tappet seat 17 21 times
Produce relative displacement, so as to cause the actual displacement of the actual displacement of valve actuating push rod 1 more than tappet seat 17, valve added lift by
This generation.
The actual value of valve added lift is relevant with the volume change in pumping cavity 18 and added lift chamber 20；ΔV1=Δ V2,
That is s1Δl1=s2Δl2, V1For the volume of pumping cavity 18, s1For hydraulic oil lifting surface area in pumping cavity 18, p1For in pumping cavity 18
Hydraulic oil pressure, V2For the volume in added lift chamber 20, s2For hydraulic oil lifting surface area in added lift chamber 20, p2For additional liter
Hydraulic oil pressure in journey chamber 20, Δ l1For the descending displacement of tappet, Δ l2For the added lift value of valve；When 18 hydraulic pressure of pumping cavity
Oily lifting surface area s1With the lifting surface area s in added lift chamber 202Ratio be 1:When 1, the descending displacement of tappet 10 is additional with valve
Lift range value is equal；Work as s1With s2Ratio be more than 1:When 1, added lift value of the descending displacement of tappet 10 less than valve；Work as s1With s2
Ratio be less than 1:When 1, added lift value of the descending displacement of tappet 10 more than valve；It follows that appropriate design s can be passed through1
With s2Ratio adjusting the added lift of valve；When valve added lift value is more than maximum added lift value, hydraulic oil Jing
The pressure limiting valve 12 of oil return oil duct 14 flows out, and the added lift of valve keeps dynamic equilibrium, until oil return solenoid valve 16 is opened, adds
Lift disappears；When tappet 10 is up with cam 11, enters solenoid 6 and oil return solenoid valve 16 is opened, enter solenoid 6
Hydraulic oil is prepared into pumping cavity 18 for circulation once, and the hydraulic oil in added lift chamber 20 is in the presence of return spring 22
Jing oil return solenoid valves 16 flow into hydraulic oil pond 5；When added lift need not be produced, enter solenoid 6 and oil return solenoid valve 16
State, cam profile motion of the valve by former machine are maintained a normally open.
, compared with traditional valve actuating mechanism, this utility model can be according to the rotating speed of each operating mode of electromotor and load for this utility model
The keying moment of adjustment valve and lift, preferably can meet fuel economy under each operating mode load of electromotor, dynamic property and
The requirement of discharge, lifts the overall performance of electromotor；Changeable air valve technology can pass through the keying moment realization for changing valve simultaneously
Miller cycle, contributes to the enforcement of the new combustion pattern such as homogeneity compression-ignition, premixed combustion.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (8)
1. a kind of variable valve actuator for air, it is characterised in that：Including tappet (10), tappet overcoat (2), valve actuating push rod (1) and cam
(11)；Cylindrical structure of the tappet (10) for lower hollow structure, tappet overcoat (2) is hollow cylindrical structure, its inner surface
It is slidably matched with tappet (10) outer surface；Cam (11) is arranged on directly over tappet (10)；Valve actuating push rod (1) is upper hollow
Cylindrical structure；Tappet seat (17) is additionally provided with, upper end is connected with tappet (10) inside upper surface, lower end and valve actuating push rod (1)
Inner surface top is slidably matched；Valve actuating push rod (1) is internally provided with the return spring (22) coordinated with its inner surface, return spring
(22) spring stop (21) is provided with above；Additional liter is constituted between spring stop (21), tappet seat (17) and valve actuating push rod (1)
Journey chamber (20)；Oil scraper ring (4) is provided between tappet overcoat (2) and valve actuating push rod (1), tappet overcoat (2) inner surface, valve are pushed away
Closed pumping cavity (18) is constituted between bar (1) outer surface, tappet (10) inner surface and tappet seat (17)；Pumping cavity (18) with it is additional
Lift chamber (20) connects；The oil-in (7) and oil return opening (15) of connection oil supply system pipeline are provided with tappet overcoat (2)；Very
The oil-feed oil duct (8) of connection oil-in (7) and pumping cavity (18) is provided with post (10)；Connection is provided with tappet (10) additional
The oil return oil duct (14) of lift chamber (20) and oil return opening (15)；The pressure limiting oil of connection oil return oil duct (14) is provided with tappet (10)
Road (13), arranges limited valve (12) on pressure limiting oil duct (13).
2. a kind of variable valve actuator for air according to claim 1, it is characterised in that：The pumping cavity (18) and added lift
In line check valve (9) is provided between chamber (20).
3. a kind of variable valve actuator for air according to claim 1, it is characterised in that：The tappet seat (17) is mid diameter
Greatly, three little rank cylindrical structures of two ends diameter；First rank cylinder and the setting of tappet (10) inside upper surface from top to bottom
Cylinder groove is engaged, and the 3rd rank cylinder is engaged with above valve actuating push rod (1) inner surface from top to bottom.
4. a kind of variable valve actuator for air according to claim 1, it is characterised in that：The spring stop (21) and tappet seat
(17), between, on valve actuating push rod (1), it is provided with thrust block (19).
5. a kind of variable valve actuator for air according to claim 1, it is characterised in that：The oil scraper ring (4) is by positioning spiral shell
Nail (3) is fixedly connected with tappet overcoat (2).
6. a kind of variable valve actuator for air according to claim 3, it is characterised in that：Tappet seat (17) the second-order cylinder
External surface is provided with annular oil groove, and horizontal oil duct is provided with annular oil groove diametric(al), and tappet seat (17) axle sets up
There is vertical oil duct, constitute the oil duct of T-shaped；T-shaped oil duct connection pumping cavity (18) and added lift chamber (20).
7. a kind of variable valve actuator for air according to claim 1, it is characterised in that：Along tappet (10) on the tappet (10)
The direction of motion is provided with long oil groove of two not connected and two ends for arc-shaped；One of connection oil-in (7) and oil-feed
Oil duct (8)；Another connection oil return opening (15) and oil return oil duct (14).
8. a kind of variable valve actuator for air according to claim 1, it is characterised in that：The oil scraper ring (4) is hollow circuit cylinder
Body structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621072016.4U CN206071668U (en) | 2016-09-22 | 2016-09-22 | A kind of variable valve actuator for air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621072016.4U CN206071668U (en) | 2016-09-22 | 2016-09-22 | A kind of variable valve actuator for air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206071668U true CN206071668U (en) | 2017-04-05 |
Family
ID=58438957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621072016.4U Withdrawn - After Issue CN206071668U (en) | 2016-09-22 | 2016-09-22 | A kind of variable valve actuator for air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206071668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285824A (en) * | 2016-09-22 | 2017-01-04 | 西华大学 | A kind of variable valve actuator for air |
-
2016
- 2016-09-22 CN CN201621072016.4U patent/CN206071668U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285824A (en) * | 2016-09-22 | 2017-01-04 | 西华大学 | A kind of variable valve actuator for air |
| CN106285824B (en) * | 2016-09-22 | 2018-09-21 | 西华大学 | A kind of variable valve actuator for air |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170405 Effective date of abandoning: 20180921 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170405 Effective date of abandoning: 20180921 |