CN201269121Y - Switching structure of variable valve lift mechanism - Google Patents
Switching structure of variable valve lift mechanism Download PDFInfo
- Publication number
- CN201269121Y CN201269121Y CNU2008201402933U CN200820140293U CN201269121Y CN 201269121 Y CN201269121 Y CN 201269121Y CN U2008201402933 U CNU2008201402933 U CN U2008201402933U CN 200820140293 U CN200820140293 U CN 200820140293U CN 201269121 Y CN201269121 Y CN 201269121Y
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- Prior art keywords
- rocking arm
- room
- valve lift
- binding block
- switching construction
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Abstract
A switching structure of a delivery lift mechanism of a variable valve is characterized in that a pivot shaft is provided with a first rocker arm, a second rocker arm, a first containing chamber, a second containing chamber, a first pivot joint hole and a second pivot joint hole which are mutually adjacent in a pivot way. The first containing chamber is internally provided with a combining block in a containing way and the combining block forms an oil pressure chamber with the bottom of the containing chamber and is communicated with an oil path; the second containing chamber is internally provided with a piston in a containing way and the bottom thereof is provided with an elastic elopement in a combined way, wherein, a plurality of axial notches are opened between the combining block and the contract surface of the first containing chamber so as to reduce friction force between the combining block and the contact surface, thus leading the combining block to be capable of fast sliding between the first containing chamber and the second containing chamber, the first rocker arm and the second rocker arm are led to be connected so as to correspond to the high speed running of an engine or disconnected so as to correspond to the low speed running of the engine, and the first rocker arm and the second rocker arm are linked with the opening degree of inlet and exhaust gasoline throttles.
Description
Technical field
The utility model relates to a kind of switching construction of valve mechanism, refers to a kind of switching construction that is applicable to vario valve lift mechanism especially, so that inlet and outlet valve correspondence switches on high aperture, the low aperture when reaching the slow-speed of revolution when engine is high to be changeed.
Background technique
The known internal-combustion engine of tradition has used many valve mechanisms, and controls the switching sequential of different import/exhaust valves respectively with most rocking arms.For example Fig. 9 shows that high speed rocker arm 8 one ends are resisted against on the High speed cam 80, and low speed rocker arm 9 one ends are resisted against on the Lower speed cam 90, moves with the valve lift that drives two valve rods 81,91 respectively by difform high, low speed cam 80,90.
Because the cam face of high, low speed cam 80,90 is in case fixing, its valve lift action of being in charge of high, low speed rocking arm 8,9 promptly is fixed.Therefore, various inlet (or exhaust) demand for can be in response to high and low rotating speed the time is knownly in time linked high, low speed rocking arm 8,9 or is removed binding by a kind of switching construction, uses making two valve rods 81,91 form vario valve lift mechanisms.
Show that as Figure 10 this known switching construction is to establish a spring 82 in high speed rocker arm 8 inside to push against a cap 83, the low speed rocker arm 9 inner sliding binding blocks 93 of establishing.Binding block 93 length approximate low speed rocker arm 9 width as shown in the figure, when therefore oil pressure oil circuit 92 does not pressurize, this binding block 93 is contracted to the bottom in the contact of cap 83 by opposite spring 82, form high, low speed rocking arm 8,9 connecting states not, so can drive respectively to do the action of valve lift according to its other high, low speed cam 80,90 shapes, be applicable to slow-speed of revolution occasion.
Figure 11 shows high, low speed rocking arm 8,9 states connected to each other, it is to promote binding block 93 forward by 92 pressurizations of oil pressure oil circuit, and overcome the contact elastic force of spring 82 and cap 83, therefore binding block 93 inserts high speed rocker arm 8 and is linked, so high, low speed rocking arm 8,9 is all done the action of valve lift according to the higher High speed cam 80 of cam face with synchronous drive, is applicable to the high rotating speed occasion of big air inlet (or exhaust) demand.
Yet, the known oil pressure oil circuit 92 of working as begins the pressurization initial stage, since the wall of the peripheral surface of binding block 93 and hydraulic chamber 94 the friction of relative generation, and itself inertial mass of binding block 93 causes the oil pressure booster reaction slower more greatly, and it is very quick to add high, low speed rocking arm 8,9 relative movement this moment, cause binding block 93 to insert high speed rocker arm 8 actions not rapidly not really, cause binding block 93 frequent escapes, and produce different sound, all non-very good.
The model utility content
The purpose of this utility model provides the switching construction of a kind of vario valve lift mechanism, and it can improve known binding block and insert certain problem rapidly of high speed rocker arm action.
The purpose of this utility model is to realize like this, the switching construction of a kind of vario valve lift mechanism, mainly be coaxial one first mutually neighbour rocking arm, and one second rocking arm of being pivoted with on a pivot, first, second rocking arm is concaved with one first, 1 second corresponding room, and one first, 1 second pivoted hole respectively in adjacent inboard.The first room inside has been installed with a binding block, forms a hydraulic chamber between binding block and first room bottom, and it is communicated to an oil circuit.And the second room inside has been installed with a piston, and group is provided with an elastic element between itself and second room bottom, and pivot is hubbed between first, second pivoted hole.Offer most shafts to groove between the surface of contact of the binding block and first room, when first rocking arm, and second rocking arm when being not connecting state corresponding to pivot respectively, by oil circuit from hydraulic chamber's oil pressure of releasing, the pre-power of the elasticity that elastic element is provided is promoted binding block, is reached piston, and it is located in respectively in first, second room.Relatively, when first, second rocking arm is connecting state corresponding to pivot, make hydraulic chamber produce a constant voltage, binding block is released first room form outward by the oil circuit fuel feeding.
So, can make first rocking arm, reach second rocking arm when connecting state runs up with corresponding engine, the high aperture that the inlet and outlet throttle is opened; Or make first rocking arm, and second rocking arm in connecting state not during with corresponding engine low-speed running, the low aperture that the inlet and outlet throttle is opened.
Wherein, most shafts can be opened in the outer wall of binding block to groove; Or most shafts also can be opened in the inwall of first room to groove.And most shafts can be spaced set to groove.Simultaneously, its axle center of binding block is concaved with an axial slots, in order to alleviate the weight of binding block.The oil pressure control of the switching construction of this vario valve lift mechanism comprises an Engine Speed Sensor, a controller, reaches a solenoid valve.Engine Speed Sensor and controller electrically connect, and controller again with the solenoid valve electrically connect, controller receives the signal of Engine Speed Sensor and then controls this oil pressure solenoid valve and open or close, in order to the oil mass turnover of control oil channel.
The utility model can by above-mentioned oil pressure controlling mechanism can be when the high rotating speed of engine opens solenoid valve impel binding block to link first rocking arm, and second rocking arm and drive the high folding degree of inlet and outlet throttle so that oil pressure to be provided, and when the engine slow-speed of revolution, close solenoid valve with discharge oil pressure make binding block separate first rocking arm, and second rocking arm between, and drive the low folding degree of inlet and outlet throttle with rocking arm.Improve known binding block and inserted the not rapid certain problem of high speed rocker arm action, and can eliminate the frequent escape of binding block, produced the problem of different sound.
Description of drawings
Fig. 1 is the sectional view of the utility model first preferred embodiment.
Fig. 2 is the exploded view of the utility model first preferred embodiment.
Fig. 3 is the enlarged view of the utility model first preferred embodiment binding block.
Fig. 4 is the schematic representation of the oil pressure control system of the utility model first preferred embodiment.
Fig. 5 is the not stereogram of connecting state of the utility model first preferred embodiment.
Fig. 6 is the stereogram of the utility model first preferred embodiment connecting state.
Fig. 7 is the partly stereogram of assembly of the utility model second preferred embodiment.
Fig. 8 is the stereogram of the utility model the 3rd preferred embodiment.
Fig. 9 is known sectional view.
Figure 10 is the sectional view of known not connecting state.
Figure 11 is the sectional view of known connecting state.
The primary clustering symbol description
First rocking arm, 1,19 first room, 11 hydraulic chamber 111,94
Surface of contact 112,222,42 axial notches, 113,121 binding blocks 12,23,93
Axial slots 122,231 pistons 13 rooms 131
Second room, 21 second pivoted holes, 22 cam set 3
Right valve rod 52,181 drain tap connecting rods 6 Engine Speed Sensors 70
High speed rocker arm 8 High speed cams 80 valve rods 81,91
Embodiment
Please consult Fig. 1, Fig. 2 simultaneously, reach Fig. 3.Fig. 1 is the sectional view of the utility model first preferred embodiment, the exploded view that its relative position relation, Fig. 2 that is arranged in engine in order to the element that shows present embodiment is the utility model first preferred embodiment, and Fig. 3 be the enlarged view of the utility model first preferred embodiment binding block.
As shown in the figure, present embodiment is the switching construction of a kind of vario valve lift mechanism, mainly be on a pivot 17 coaxial be pivoted with one first mutually neighbour rocking arm 1, and one second rocking arm, 2, one cam set 3 include a Lower speed cam 31, a High speed cam 32, an and exhaust cam 33.Wherein, Lower speed cam 31 corresponding contact make the rocking arm 1 of winning drive an air intake valve connecting rod 5 and then open and close air intake valve, in this example in the surface of contact 112 of first rocking arm 1, air intake valve connecting rod 5 comprises a left valve rod 51, reaches a right valve rod 52, and it is driven simultaneously by first rocking arm 1.High speed cam 32 corresponding contact are in the surface of contact 222 of second rocking arm 2, because High speed cam 32 is higher than the lift of Lower speed cam 31, therefore the oscillator arc of second rocking arm 2 is greater than first rocking arm 1.Exhaust cam 33 corresponding contact make exhaust rocker arm 4 drive a drain tap connecting rod 6 and then open and close drain tap in the surface of contact 42 of an exhaust rocker arm 4.
As shown in Figure 2, first, second rocking arm 1,2 are concaved with one first, 1 second corresponding room 11,21, and one first, 1 second pivoted hole 16,22 respectively in adjacent inboard, first room, 11 inside have been installed with a binding block 12, and second room, 21 inside have been installed with a piston 13, and group is provided with an elastic element 15 between itself and second room, 21 bottoms, and piston 13 also is concaved with a room 131 to be installed with this elastic element 15 simultaneously, in this example, elastic element 15 is meant a pressure spring.Again, it is communicated to an oil circuit 14 first room 11, and this oil circuit 14 is arranged with in first pivoted hole 16, and pivot 17 is hubbed between first, second pivoted hole 16,22, therefore, oil circuit 14 is able to communicate with the pivot oil circuit 173 of pivot 17, is communicated to outside (figure does not show) again.
As shown in Figure 3, binding block 12 its outer walls offer most shafts to groove 121, this axial notch 121 is to be spaced set, simultaneously in order to alleviate the weight of binding block 12, it is concaved with an axial notch 122 in the place, axle center, so, more can alleviate the weight of binding block 12 friction except between the surface of contact that can reduce the binding block 12 and first room 11.Therefore, binding block 12 slippage is more rapidly inserted the not rapid certain problem of high speed rocker arm action to improve known binding block between first room 11 and second room 21.
See also Fig. 4, it is the schematic representation of the oil pressure control system of the utility model first preferred embodiment.This oil pressure control system comprises an Engine Speed Sensor 70, a controller 71, an oil pressure solenoid valve 72 as shown in the figure.Engine Speed Sensor 70 and controller 71 electrically connects, and controller 71 again with oil pressure solenoid valve 72 electrically connects, controller 71 receives the signal and then the control oil pressure solenoid valve 72 of Engine Speed Sensors 70 and opens or close.For example, when engine entered high rotation speed operation, Engine Speed Sensor 70 sent a high rotary speed instruction to controller 71, afterwards, controller 71 is sent a pilot signal order oil pressure solenoid valve 72 and is opened, so that machine oil 73 is able to the inflow oil circuit 14 via oil pressure solenoid valve 72; Otherwise, when engine entered slow-speed of revolution running, Engine Speed Sensor 70 sent a slow-speed of revolution and instructs to controller 71, afterwards, controller 71 is sent a pilot signal order oil pressure solenoid valve 72 and is closed, so that machine oil 73 is able to the outflow oil circuit 14 via oil pressure solenoid valve 72.
See also Fig. 5 and consult Fig. 2 in the lump, it is the not stereogram of connecting state of the utility model first preferred embodiment.When engine enters slow-speed of revolution running, by oil circuit 14 hydraulic chamber 111 is released from pivot oil circuit 173, the pre-power of elasticity that is provided via elastic element 15 is promoted binding block 12, is reached piston 13 again, and it is located in respectively in first, second room 11,21.At this moment, first rocking arm 1, and second rocking arm 2 be not connecting state corresponding to pivot 17 respectively, therefore, first rocking arm 1, and second rocking arm 2 control its lift respectively by Lower speed cam 31 and High speed cam 32, make air intake valve connecting rod 5 be low folding degree.
See also Fig. 6 and see also Fig. 2 and Fig. 4, it is the stereogram of the utility model first preferred embodiment connecting state, as shown in the figure, when engine enters high rotation speed operation, oil pressure enters from pivot oil circuit 173, via oil circuit 14 so that hydraulic chamber 111 is full of machine oil 73 to produce a constant voltage, this constant voltage can overcome the pre-power of the elasticity that elastic element 15 is provided and binding block 12 is released outside first room 11, and make first, second rocking arm 1,2 are connecting state corresponding to pivot 17, at this moment, first rocking arm 1, and second rocking arm 2 makes air intake valve connecting rod 5 be high folding degree by High speed cam 32 its lifts of control.
See also Fig. 7, it is the stereogram of the utility model second preferred embodiment portion of element, the structure of itself and first preferred embodiment is roughly the same, only different to be in most shafts are the inwalls that are opened in first room 11 equally spacedly to groove 113, and substitute the binding block 12 of last examples with the binding block 23 of a surface smoothing.
See also Fig. 8, it is the stereogram of the utility model the 3rd preferred embodiment.Its structure and first preferred embodiment are roughly the same, and only to be in first rocking arm 19 be that interlock one left valve rod 191, the second rocking arms 18 are interlock one right valve rods 181 to difference.
The foregoing description is only given an example for convenience of description, and the interest field that the utility model is advocated is from should but not only limiting to the foregoing description with described being as the criterion of claim of application.
Claims (10)
1. the switching construction of a vario valve lift mechanism, mainly be coaxially on a pivot to be pivoted with one first mutually neighbour rocking arm, and one second rocking arm, this first rocking arm is concaved with one first corresponding room and one second room respectively with this second rocking arm in adjacent inboard, and one first pivoted hole and one second pivoted hole, this first room inside has been installed with a binding block, form a hydraulic chamber between this binding block and this first room bottom, it is communicated to an oil circuit, and this second room inside has been installed with a piston, group is provided with an elastic element between itself and this second room bottom, and this pivot is hubbed between this first pivoted hole and this second pivoted hole;
It is characterized in that:
Offer most shafts to groove between the surface of contact of this binding block and this first room, when this first rocking arm, and this second rocking arm when being not connecting state corresponding to this pivot respectively, be from this hydraulic chamber oil pressure of releasing by this oil circuit, the pre-power of the elasticity that this elastic element is provided is promoted this binding block, is reached this piston, and it is located in respectively in this first room and this second room; Relatively, when this first rocking arm and second rocking arm are connecting state corresponding to this pivot, be to make this hydraulic chamber produce a constant voltage by this oil circuit fuel feeding, it is outer and form that this binding block is released this first room.
2. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this most shafts is opened in the outer wall of this binding block to groove.
3. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this most shafts is the inwall that is opened in this first room to groove.
4. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this most shafts is a spaced set to groove.
5. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that the axle center of this binding block is concaved with an axial slots.
6. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this piston is concaved with a room to be installed with this elastic element.
7. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this elastic element refers to a pressure spring.
8. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that more comprising a solenoid valve, and it is in order to control the oil mass turnover of this oil circuit.
9. the switching construction of vario valve lift as claimed in claim 8 mechanism, its feature one in more comprising an Engine Speed Sensor, an and controller, this controller and this Engine Speed Sensor, and this solenoid valve electrically connect, this controller receive the signal of this Engine Speed Sensor and then control this oil pressure solenoid valve and open or close.
10. the switching construction of vario valve lift as claimed in claim 1 mechanism is characterized in that this first rocking arm and a left valve rod interlock, this second rocking arm and a right valve rod interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201402933U CN201269121Y (en) | 2008-10-16 | 2008-10-16 | Switching structure of variable valve lift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201402933U CN201269121Y (en) | 2008-10-16 | 2008-10-16 | Switching structure of variable valve lift mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269121Y true CN201269121Y (en) | 2009-07-08 |
Family
ID=40841719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201402933U Expired - Fee Related CN201269121Y (en) | 2008-10-16 | 2008-10-16 | Switching structure of variable valve lift mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269121Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912329A (en) * | 2013-01-05 | 2014-07-09 | 光阳工业股份有限公司 | Internal combustion engine facilitating extraction and replacement of rocker arm shaft |
| CN105089732A (en) * | 2014-05-14 | 2015-11-25 | 丰田自动车株式会社 | Control device of internal combustion engine and variable valve device of internal combustion engine |
-
2008
- 2008-10-16 CN CNU2008201402933U patent/CN201269121Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912329A (en) * | 2013-01-05 | 2014-07-09 | 光阳工业股份有限公司 | Internal combustion engine facilitating extraction and replacement of rocker arm shaft |
| CN105089732A (en) * | 2014-05-14 | 2015-11-25 | 丰田自动车株式会社 | Control device of internal combustion engine and variable valve device of internal combustion engine |
| CN105089732B (en) * | 2014-05-14 | 2017-12-08 | 丰田自动车株式会社 | The control device of internal combustion engine and the variable valve gear of internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090708 Termination date: 20171016 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |