CN205805636U - The sliding cam axle of variable valve lift - Google Patents
The sliding cam axle of variable valve lift Download PDFInfo
- Publication number
- CN205805636U CN205805636U CN201620458800.2U CN201620458800U CN205805636U CN 205805636 U CN205805636 U CN 205805636U CN 201620458800 U CN201620458800 U CN 201620458800U CN 205805636 U CN205805636 U CN 205805636U
- Authority
- CN
- China
- Prior art keywords
- guiding groove
- groove
- lift
- backhaul
- action bars
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
-
- 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
- F01L2013/10—Auxiliary actuators for variable valve timing
- F01L2013/101—Electromagnets
Abstract
The utility model discloses the sliding cam axle of a kind of variable valve lift, including central shaft, cam bit and the executor with action bars；Cam sleeve slidingtype connects on center shaft and spacing with central shaft circumference, and the action bars end of executor contacts with cam bit or disengages；One end periphery wall of described cam bit is provided with lift guiding groove and backhaul guiding groove, and the action bars end of executor is slidably fitted in lift guiding groove or backhaul guiding groove；Converge for same termination groove at described lift guiding groove and the termination of backhaul guiding groove, be the most independent and parallel at both starting vessels；Described starting vessel is between two termination grooves.After using above structure, enormously simplify the structure of lift range variable, only need to process two guiding grooves on cam bit outer circle wall, it is to avoid the docking of groove in prior art.
Description
Technical field
This utility model relates to the technical field of camshaft, is especially the sliding cam of a kind of variable valve lift
Axle.
Background technology
Traditional petrolic valve stroke is fixing immutable, say, that the cam profile of camshaft is only
One, this has resulted in this long-range can not make electromotor all obtain good response in high velocity and low regime.Conventional gasoline
The design of cam contour line of the valve stroke of electromotor is to select electromotor balance under full working scope, and its result is electromotor
Both less than optimal high speed efficiency, also can not get optimal low speed torque, simply obtain best balanced performance under full working scope.Gas
Door timing is to run strict time control to be had up and down with piston when of valve opening closedown, and it is to ensure that electromotor is transported
The key factor of row.And lift range variable is on the basis of valve timing, under individual other operating mode, the unlatching making valve is big
Little change, reduce discharge improving engine power or stabilized (steady-state) speed.Such as air inlet is few and aerofluxus is many during idling,
Bigger air-intake negative-pressure and more eddy current can be produced, allow air and fuel oil be sufficiently mixed, thus the torsion during raising slow-speed of revolution
Output；And during high speed, valve opening big, air inlet is the most, and the air so sucked is more, makes the breathing of electromotor more suitable
Freely.
In prior art, variable valve lift system is mainly by the low angle cam on switching camshaft and high angle
Cam, realizes the variable lift of valve.Publication No. CN104047662A as disclosed on State Intellectual Property Office website
Patent " multistage variable valve lift apparatus, system and electromotor ", it includes camshaft, multiple cam, electromagnetic unit and valve
Open or close part；Multiple cams are slidably disposed on camshaft and each cam includes having guiding boss
Cam base portion and cam lobe, electromagnetic unit includes the action bars with guiding groove, and guiding boss selectively inserts guiding groove,
Valve opens or closes any one selective contact of part and multiple cams.
But, the structure of this lift range variable there is the problem that
1) as shown in accompanying drawing 3 in this patent application, the guiding boss of cam includes that operation guide protuberance is with reverse
Guiding boss, thus cause at the point intersected with each other at operation guide protuberance and reverse leading protuberance, form rhombus friendship
Fork protuberance, in order to make the action bars on electromagnetic unit successfully can slide on these guiding boss, dashes forward in diamond crossing
Go out portion is provided around groove；When electromagnetic unit starts, the end of its action bars is at guiding boss, reverse leading protuberance
Slide with on diamond crossing protuberance, to realize the variable of valve stroke；But, due to the guiding boss on gear outer wall
Trend be to tilt, therefore, this adds difficulty in processing, and especially guiding boss and reverse leading protuberance is handed over
The processing of the diamond crossing protuberance at remittance, the docking of the groove around these requires height, further increases the difficulty of processing；
2) it addition, the lift of changeable air valve and backhaul are and reversely to be drawn at guiding boss by the action bars of electromagnetic unit
Leading what the switching between protuberance realized, the rotating shaft of electromotor simultaneously turns to and also changes, therefore, and the operation of electromagnetic unit
Bar realizes boom and returns two actions of bar, and the signal of telecommunication that these actions are all electromagnetic units controls；Especially action bars
When covering a lift, action bars must return bar, is now to make the spring in electromagnetic valve deform by sending the signal of telecommunication,
And the stretching of spring or compression all have a hysteresis quality, thus result in action bars and return the reaction of bar slowly, so that valve liter
The transmutability of journey becomes unstable, and reacts insensitive.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of processes valve liter simple, that reaction is sensitiveer
The sliding cam axle that journey is variable.
For solving above-mentioned technical problem, the slidingtype central shaft of the variable valve lift that this utility model provides, it includes
Central shaft, cam bit and the executor with action bars；Cam bit slidingtype connects on center shaft and limits with central shaft circumference
Position, the action bars end of executor contacts with cam bit or disengages；It is characterized in that: one end periphery wall of described cam bit
Being provided with lift guiding groove and backhaul guiding groove, the action bars end of executor is slidably fitted in lift guiding groove or backhaul is drawn
In guide groove；Converge for same termination groove at described lift guiding groove and the termination of backhaul guiding groove, at both starting vessels
For the most independent and parallel；Described starting vessel is between two termination grooves.
Described executor is electromagnetic valve, with two behaviour being stretched out by electromagnetic valve control or being bounced back on each electromagnetic valve
Making bar, the end of two action bars is the most each slidably connected in lift guiding groove or backhaul guiding groove.
One section, the centre of described lift guiding groove is spiral lead-over groove, and one section, the centre of same backhaul guiding groove is and liter
The spiral lead-over groove that in journey guiding groove, the hand of spiral of spiral lead-over groove is contrary；Article two, it is provided with point to guiding between spiral lead-over groove
Ridge, dividing to guiding ridge is tip end in the meet of lift guiding groove and backhaul guiding groove.
The quantity of described executor is identical with the quantity of cam bit.
The bottom land of the termination groove that described lift guiding groove and backhaul guiding groove share is the cambered surface outwards arched upward, this cambered surface
One end extend through the circumferential wall to cam bit, the other end is smoothed with the meet of lift guiding groove and backhaul guiding groove
Cross.
After using above structure, this utility model compared with prior art, has the advantage that
1) it is combined a shared termination groove, simply two due to the lift guiding groove on cam bit and backhaul guiding groove
The meet of person is provided with point to the tip end guiding ridge, and both starting vessels then lay respectively at the both sides of termination groove,
The action bars only needing executor when lift and backhaul slides in lift guiding groove or slides in backhaul guiding groove, and passes through
Divide to guiding ridge to guide, therefore, enormously simplify the structure of lift range variable, only need to be at cam bit outer circle wall
On process two guiding grooves, it is to avoid the docking of groove in prior art；
2) simultaneously, after the structure of lift and backhaul simplifies, synchronously make action bars at lift guiding groove and backhaul guiding groove
Interior slip is more smooth and easy, and the switching of lift and backhaul is sensitiveer, quick；
3) two action bars are arranged on same electromagnetic valve, make an electromagnetic valve control two action bars, and lift
Guiding groove and backhaul guiding groove get together, and shorten the entire length size of central shaft, make structure compacter from length,
It is more applicable in the compactest existing engine system；
4) bottom land of the termination groove of lift guiding groove and backhaul guiding groove is cambered surface transition, makes action bars cover a row
Cheng Houneng is transitioned on the outer circle wall of cam bit by plane, thus disengages, and in other words, adds mechanical action bars
Retracting action, compensate for the hysteresis quality of spring works, makes the switching of action bars when lift and backhaul more accurate.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the slidingtype central shaft of this utility model variable valve lift.
Fig. 2 is axial broken section structural representation in Fig. 1.
Fig. 3 is the structural representation of this utility model cam block.
Fig. 4 is the perspective view of this utility model cam block.
Fig. 5 is the sectional structure schematic diagram of this utility model cam block.
Fig. 6 is the structural representation in A-A direction in Fig. 1.
Fig. 7 is the structural representation in B-B direction in Fig. 1.
Wherein, 1, central shaft；2, cam bit；3, electromagnetic valve；4, action bars；5, backhaul guiding groove；6, lift guiding groove；7、
Divide to guiding ridge；8, plane；9, termination groove；10, starting vessel；11, cambered surface；12, spiral lead-over groove.
Detailed description of the invention
With detailed description of the invention, this utility model is described in more detail below in conjunction with the accompanying drawings.
From the structural representation of the slidingtype central shaft of this utility model variable valve lift shown in Fig. 1～Fig. 7,
It includes central shaft 1, cam bit 2 and the executor with action bars 4.Cam bit 2 slidingtype be connected on central shaft 1 and with in
Mandrel 1 circumference is spacing, and action bars 4 end of executor contacts with cam bit 2 or disengages.In the present embodiment, cam bit 2 with in
The circumference of mandrel 1 is spacing refers to central shaft 1 for splined shaft, cam bit 2 is provided with splined hole, both carry out coupling by spline thus
Realize circumference spacing.One end periphery wall of described cam bit 2 is provided with lift guiding groove 6 and backhaul guiding groove 5, executor's
Quantity is identical with the quantity of cam bit 2, and action bars 4 end of executor is slidably fitted in lift guiding groove 6 or backhaul
In guiding groove 5.Converging for same termination groove 9 at described lift guiding groove 6 and the termination of backhaul guiding groove 5, both rise
It is the most independent and parallel at beginning groove 10.Described starting vessel 10 is between two termination grooves 9.
Described executor is electromagnetic valve 3, and each electromagnetic valve 3 is controlled stretch out or bounce back by electromagnetic valve 3 with two
Action bars 4, the end of two action bars 4 is the most each slidably connected at lift guiding groove 6 or backhaul guiding groove 5
In.
One section, the centre of described lift guiding groove 6 is spiral lead-over groove 12, and one section, the centre of same backhaul guiding groove 5 is
The spiral lead-over groove 12 contrary with the hand of spiral of spiral lead-over groove 12 in lift guiding groove 6.Article two, between spiral lead-over groove 12
It is provided with point to guiding ridge 7, point is tip end in the meet of lift guiding groove 6 and backhaul guiding groove 5 to guiding ridge 7.
The bottom land of the termination groove 9 that described lift guiding groove 6 and backhaul guiding groove 5 share is the cambered surface 11 outwards arched upward,
One end of this cambered surface 11 extends through the circumferential wall to cam bit 2, the other end and lift guiding groove 6 and the remittance of backhaul guiding groove 5
Seamlessly transit at conjunction.
Described lift guiding groove 6 is plane 8 with the bottom land of the starting vessel 10 of backhaul guiding groove 5, one end of plane 8 and liter
The bottom land of journey guiding groove 6 or backhaul guiding groove 5 seamlessly transits, and the other end of plane 8 extends through the circumference to cam bit 2
Wall.The bottom land of the starting vessel of lift guiding groove and backhaul guiding groove is plane transition, then be in order to logical when action bars is cut
Cross plane transition to enter in groove, be equivalent to there is an effect for buffering, thus avoid when action bars is just cut with cam bit
Vibrations, also protect each part of interaction；This is also that lift guiding groove 6 and backhaul guide on machining cam block simultaneously
The incision transition face of milling cutter during groove 5.
Course of action of the present utility model is as follows: during valve stroke, and central shaft 1 drives cam bit 2 to rotate, on electromagnetic valve 3
Left side action bars 4 (illustrating with the direction shown in accompanying drawing 1) end enter lift guiding groove 6 starting vessel 10 in, with
The rotation of cam bit 2, action bars 4 slides in lift guiding groove 6, until sliding in termination groove 9, now cam bit 2 is simultaneously
Central shaft 1 is made moving axially to the left, makes the exterior annular groove that the steel ball in central shaft 1 is pushed against in cam bit 2；Gas
During door backhaul, central shaft 1 drives cam bit 2 to rotate, and action bars 4 end on the right side on electromagnetic valve 3 enters backhaul guiding groove 5
In starting vessel 10, along with the rotation of cam bit 2, action bars 4 slides in backhaul guiding groove 5, until sliding in termination groove 9, this
Time cam bit 2 on central shaft 1, make moving axially to the right simultaneously, make that the steel ball in central shaft 1 is pushed against in cam bit 2 is interior
Side ring-shaped groove.
The above, be only the most feasible enforcement example of this utility model, it is impossible to the most i.e. limit to of the present utility model
Interest field, for those skilled in the art, all utilization the technical solution of the utility model and technology design are made
Other various corresponding changes all should belong within this utility model scope of the claims.
Claims (5)
1. a sliding cam axle for variable valve lift, including central shaft (1), cam bit (2) and with action bars (4)
Executor；It is upper and spacing with central shaft (1) circumference that cam bit (2) slidingtype is connected to central shaft (1), the action bars of executor
(4) end contacts with cam bit (2) or disengages；It is characterized in that: one end periphery wall of described cam bit (2) is provided with liter
Journey guiding groove (6) and backhaul guiding groove (5), action bars (4) end of executor is slidably fitted in lift guiding groove (6) or returns
In journey guiding groove (5)；Converge for same termination groove at described lift guiding groove (6) and the termination of backhaul guiding groove (5)
(9), both starting vessel (10) places are the most independent and parallel；Described starting vessel (10) be positioned at two termination groove (9) it
Between.
The sliding cam axle of variable valve lift the most according to claim 1, it is characterised in that: described executor is
Electromagnetic valve (3), with two action bars (4) being stretched out by electromagnetic valve (3) control or being bounced back on each electromagnetic valve (3), two
The end of action bars (4) is the most each slidably connected in lift guiding groove (6) or backhaul guiding groove (5).
The sliding cam axle of variable valve lift the most according to claim 1, it is characterised in that: described lift guides
One section, the centre of groove (6) is spiral lead-over groove (12), and one section, the centre of same backhaul guiding groove (5) is and lift guiding groove (6)
The spiral lead-over groove (12) that the hand of spiral of middle spiral lead-over groove (12) is contrary；Article two, be provided with between spiral lead-over groove (12) point to
Guiding ridge (7), dividing to guiding ridge (7) is tip end in the meet of lift guiding groove (6) and backhaul guiding groove (5).
The sliding cam axle of variable valve lift the most according to claim 1, it is characterised in that: described executor's
Quantity is identical with the quantity of cam bit (2).
The sliding cam axle of variable valve lift the most according to claim 1, it is characterised in that: described lift guides
Groove (6) is the cambered surface (11) outwards arched upward with the bottom land of the termination groove (9) that backhaul guiding groove (5) shares, the one of this cambered surface (11)
End extends through the circumferential wall to cam bit (2), and the other end is flat with the meet of lift guiding groove (6) and backhaul guiding groove (5)
Slip over and cross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620458800.2U CN205805636U (en) | 2016-05-18 | 2016-05-18 | The sliding cam axle of variable valve lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620458800.2U CN205805636U (en) | 2016-05-18 | 2016-05-18 | The sliding cam axle of variable valve lift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205805636U true CN205805636U (en) | 2016-12-14 |
Family
ID=57499941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620458800.2U Active CN205805636U (en) | 2016-05-18 | 2016-05-18 | The sliding cam axle of variable valve lift |
Country Status (1)
| Country | Link |
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| CN (1) | CN205805636U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863765A (en) * | 2016-05-18 | 2016-08-17 | 宁波圣龙汽车动力系统股份有限公司 | Sliding type cam shaft with variable valve lift |
| CN108716426A (en) * | 2017-03-31 | 2018-10-30 | 马勒国际有限公司 | Valve acutating gear for internal combustion engine |
| CN108843422A (en) * | 2018-06-19 | 2018-11-20 | 浙江吉利控股集团有限公司 | Lift range variable regulating device and its control method |
| CN110005498A (en) * | 2019-05-15 | 2019-07-12 | 杰锋汽车动力系统股份有限公司 | A kind of two-stage variable air valve lift range mechanism for internal combustion engine |
| CN110005495A (en) * | 2019-05-09 | 2019-07-12 | 杰锋汽车动力系统股份有限公司 | Internal combustion engine three-level lift range variable structure |
| CN110159386A (en) * | 2019-05-09 | 2019-08-23 | 杰锋汽车动力系统股份有限公司 | Internal combustion engine two-stage variable air valve lift range mechanism |
-
2016
- 2016-05-18 CN CN201620458800.2U patent/CN205805636U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863765A (en) * | 2016-05-18 | 2016-08-17 | 宁波圣龙汽车动力系统股份有限公司 | Sliding type cam shaft with variable valve lift |
| CN108716426A (en) * | 2017-03-31 | 2018-10-30 | 马勒国际有限公司 | Valve acutating gear for internal combustion engine |
| CN108716426B (en) * | 2017-03-31 | 2021-03-26 | 马勒国际有限公司 | Valve gear for an internal combustion engine |
| CN108843422A (en) * | 2018-06-19 | 2018-11-20 | 浙江吉利控股集团有限公司 | Lift range variable regulating device and its control method |
| CN110005495A (en) * | 2019-05-09 | 2019-07-12 | 杰锋汽车动力系统股份有限公司 | Internal combustion engine three-level lift range variable structure |
| CN110159386A (en) * | 2019-05-09 | 2019-08-23 | 杰锋汽车动力系统股份有限公司 | Internal combustion engine two-stage variable air valve lift range mechanism |
| CN110005498A (en) * | 2019-05-15 | 2019-07-12 | 杰锋汽车动力系统股份有限公司 | A kind of two-stage variable air valve lift range mechanism for internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |