CN106246276A - The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method - Google Patents
The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method Download PDFInfo
- Publication number
- CN106246276A CN106246276A CN201610757733.9A CN201610757733A CN106246276A CN 106246276 A CN106246276 A CN 106246276A CN 201610757733 A CN201610757733 A CN 201610757733A CN 106246276 A CN106246276 A CN 106246276A
- Authority
- CN
- China
- Prior art keywords
- rocking arm
- activator
- piezo
- valve
- valve clearance
- 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.)
- Pending
Links
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
-
- 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
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
- F01L9/24—Piezo-electric actuators
Abstract
The present invention relates to technical field of engines, particularly relate to automatic adjusting mechanism and the Automatic adjustment method of a kind of valve clearance.Valve clearance can be carried out automatization's regulation.Overcoming and waste time and energy when being adjusted valve clearance by manpower intervention in prior art, cost of labor is high, and is difficult to meet the defect of the properly functioning demand of electromotor.The embodiment of the present invention provides the automatic adjusting mechanism of a kind of valve clearance, it is applied to overhead cam shaft generator, including: piezo-activator, described piezo-activator includes the first end and the second end being oppositely arranged, first end of described piezo-activator is fixed, and the second end is connected with rocking-arm driving for the fulcrum as rocking arm；First end and second end of described piezo-activator electrically connect with voltage-adjustable power respectively, described piezo-activator can elongate or shorten when the output voltage of described voltage-adjustable power changes, the fulcrum driving described rocking arm moves up and down, and is adjusted valve clearance.
Description
Technical field
The present invention relates to technical field of engines, particularly relate to the automatic adjusting mechanism of a kind of valve clearance and be automatically adjusted
Method.
Background technology
In the cold state, when valve is closed, the gap between valve and driving member is referred to as between valve electromotor
Gap.Valve is typically arranged in the cylinder head of internal combustion engine, and when electromotor is properly functioning, valve can occur because temperature raises
Expansion makes length increase, by arranging valve clearance, it is possible to avoiding expanding with heat and contract with cold impacts valve timing, valve clearance
Time too small, valve expands and makes valve-closing not tight, and leak air phenomenon, and engine power is declined, valve clearance mistake
Time big, valve opening is delayed, and valve stroke reduces, and the intake and exhaust time shortens so that engine charge is not enough, aerofluxus is not clean and merit
Rate declines.
In prior art, owing to the major advantage of overhead camshaft valve actuating mechanism is that movement parts is few, driving-chain is short, whole
The rigidity of mechanism is big, is suitable for high speed engine, and therefore, most of automobile engines all use overhead camshaft gazogene
Structure.
But, electromotor, in running, along with the increase of the time of operation, can wear and tear between valve and driving member
And valve clearance is changed, at this moment can affect normal valve timing, and, research shows, the size of valve clearance
Power under electromotor different rotating speeds is exported the impact having in various degree, wishes when engine speed is relatively low to increase between valve
Gap, then wishes when rotating speed is higher to reduce valve clearance, and in prior art, the regulation of valve clearance generally uses manual adjustment side
Formula, wastes time and energy, and cost of labor is high, and is difficult to meet the properly functioning demand of electromotor.
Summary of the invention
Embodiments of the invention provide automatic adjusting mechanism and the Automatic adjustment method of a kind of valve clearance, it is possible to valve
Gap carries out automatization's regulation.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
On the one hand, the embodiment of the present invention provides the automatic adjusting mechanism of a kind of valve clearance, is applied to overhead camshaft
Electromotor, including:
Piezo-activator, described piezo-activator includes the first end and the second end being oppositely arranged, described piezo-activator
The first end fix, the second end is for being connected with rocking-arm driving as the fulcrum of rocking arm；
First end and second end of described piezo-activator electrically connect with voltage-adjustable power respectively, described piezo-activator
Can elongate or shorten when the output voltage of described voltage-adjustable power changes, drive and move down on the fulcrum of described rocking arm
Dynamic, valve clearance is adjusted.
Preferably, described automatic adjusting mechanism also includes housing and the drive mechanism being fixedly installed, the one of described housing
End is open, and described piezo-activator and described drive mechanism are arranged in described housing successively by the open end of described housing,
And the first end of described piezo-activator end thereof contacts relative with the open end of described housing connects, the second end and described transmission
Mechanism connects near the end thereof contacts of described piezo-activator, and described drive mechanism stretches out away from one end of described piezo-activator
Described hull outside is flexibly connected with described rocking arm.
Optionally, described drive mechanism includes: pressure-bearing body and supporter, and described pressure-bearing body and described supporter are by described
The open end of housing is arranged in described housing successively, and the first end of described pressure-bearing body terminates with the second of described piezo-activator
Touching and connect, the second end of described pressure-bearing body, described supporter enclose near one end of described piezo-activator and described housing
Hydraulic cavities.
Preferably, described hydraulic cavities is less than described hydraulic cavities near described away from the diameter of one end of described piezo-activator
The diameter of one end of piezo-activator.
Further, it is provided with pressure transducer at the preset height of described hydraulic cavities.
Preferably, described pressure transducer includes test side, the housing sidewall at described preset height offering through hole,
The test side of described pressure transducer is positioned at described hydraulic cavities through described through hole, and with the edge seal of described through hole even
Connect.
Optionally, described piezo-activator is constituted by multilayer piezoelectric ceramic sheet is stacked.
On the other hand, the embodiment of the present invention provides the valve actuating mechanism of a kind of electromotor, including valve group and valve transmission group；
Described valve train group includes rocking arm, overhead camshaft and automatic adjusting mechanism as above；
Described overhead camshaft is arranged on the top of described rocking arm, and is in transmission connection with the middle part of described rocking arm, described
The upper end of valve group is flexibly connected with one end of described rocking arm, on described automatic adjusting mechanism as described rocking arm fulcrum one
End is flexibly connected with the other end of described rocking arm；
Or, described overhead camshaft is arranged on the lower section of described rocking arm, and is flexibly connected with one end of described rocking arm,
The upper end of described valve group is flexibly connected with the other end of described rocking arm, as the fulcrum of rocking arm on described automatic adjusting mechanism
One end is flexibly connected with the middle part of described rocking arm.
Optionally, described drive mechanism passes through convex spherical and recessed ball away from one end of described piezo-activator with described rocking arm
Face is connected.
On the other hand, the embodiment of the present invention provides a kind of electromotor, including cylinder and valve actuating mechanism as above, institute
State rocking arm and be arranged on the top of described cylinder；
Described overhead camshaft is arranged on the top of described rocking arm, and when being in transmission connection with the middle part of described rocking arm, institute
State between the upper cylinder cover that automatic adjusting mechanism is arranged on described rocking arm and described cylinder, and the fixing end of described automatic adjusting mechanism
Connection is contacted with described upper cylinder cover；Or,
Described overhead camshaft is arranged on the lower section of described rocking arm, and is flexibly connected with one end of described rocking arm, described
Automatic adjusting mechanism is arranged on the top of described rocking arm.
Another further aspect, the embodiment of the present invention provides the Automatic adjustment method of a kind of valve clearance, is applied to as above
Electromotor；Including:
Make electromotor run under default operating mode, the output voltage of described voltage-adjustable power is adjusted so that institute
State piezo-activator to elongate or shorten, drive the fulcrum of described rocking arm to move up and down, valve clearance is adjusted.
Preferably, electromotor is made also to include before running under default operating mode described in:
Presetting under valve clearance first, simulated engine runs under some groups of different rotating speeds, respectively at each not
By described pressure transducer, the force value at described preset height is detected under same rotating speed, obtain the rotating speed of electromotor
And the functional relationship between the pressure at valve clearance and described preset height.
Optionally, the described output voltage to described voltage-adjustable power is adjusted specifically including:
Determine the real-time rotating speed of described electromotor, preset valve clearance according to described functional relationship with second to obtain this real-time
The force value at described preset height that rotating speed is corresponding at any time, and according to described pressure transducer detected real-time
Deviation between pressure and described force value calculates the magnitude of voltage eliminated corresponding to this deviation, regulates described piezoelectricity variable power supply
Output voltage is equal to described magnitude of voltage.
Further, described second the initial valve clearance that valve clearance is described electromotor is preset.
Preferably, described second preset valve clearance according to the valve clearance of real-time speed setting of described electromotor.
Embodiments provide automatic adjusting mechanism and the Automatic adjustment method of a kind of valve clearance, by overhead
Arranging piezo-activator in formula cam axle engine, and the first end of piezo-activator is fixed, the second end is as rocking arm
Fulcrum is connected with described rocking-arm driving, and described piezo-activator can occur flexible when the change in voltage of voltage-adjustable power, band
The fulcrum of dynamic described rocking arm moves up and down, it is possible to be adjusted valve clearance.Overcome and prior art is passed through manpower intervention
Wasting time and energy when being adjusted valve clearance, cost of labor is high, and is difficult to meet the defect of the properly functioning demand of electromotor.
Accompanying drawing explanation
The structural representation of the automatic adjusting mechanism of a kind of valve clearance that Fig. 1 provides for the embodiment of the present invention；
The structural representation of a kind of valve actuating mechanism that Fig. 2 provides for the embodiment of the present invention；
The structural representation of the another kind of valve actuating mechanism that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
The automatic adjusting mechanism of a kind of valve clearance that below in conjunction with the accompanying drawings embodiment of the present invention provided and being automatically adjusted
Method is described in detail.
On the one hand, the embodiment of the present invention provides the automatic adjusting mechanism of a kind of valve clearance, is applied to overhead camshaft
Electromotor, sees Fig. 1, including:
Piezo-activator 1, described piezo-activator includes the first end and the second end being oppositely arranged, described piezo-activator
First end of 1 is fixed, and the second end is connected with rocking-arm driving for the fulcrum as rocking arm；
First end and second end of described piezo-activator 1 electrically connect with voltage-adjustable power respectively, described piezoelectric actuated
Device 1 can elongate or shorten when the output voltage of described voltage-adjustable power changes, and the fulcrum driving described rocking arm is upper and lower
Mobile, valve clearance is adjusted.
Wherein, in overhead cam shaft generator, described rocking arm is arranged on the top of cylinder, according to described camshaft and
The active position difference of described rocking arm has two kinds of structures, and a kind of structure is: described camshaft is arranged on the top of described rocking arm, and
Being in transmission connection with the middle part of described rocking arm, one end of described rocking arm is in transmission connection with fulcrum, and the other end passes with the tail end of valve group
Being dynamically connected, in the structure shown here, described rocking arm is single-arm lever, and valve clearance is formed at described rocking arm and the basic circle of described camshaft
Between, under the driving of camshaft, the swing part of rocking arm swings up and down around described fulcrum such that it is able to unlatching and the pass to valve
Close and be driven；Another kind of structure is: described rocking arm is fixed on the top of described cylinder, and described camshaft is arranged on described rocking arm
Lower section, and be in transmission connection with one end of described rocking arm, the other end of described rocking arm is in transmission connection with the tail end of valve group, at this
In structure, described rocking arm is double-arm lever, and valve clearance is formed between the tail end of described rocking arm and described valve group, at cam
Under the driving of axle, rocking arm swings with rocker arm shaft for fulcrum such that it is able to the opening and closing to valve are driven.
The embodiment of the present invention provides the automatic adjusting mechanism of a kind of valve clearance, by overhead cam shaft generator
Arranging piezo-activator 1, and the first end of piezo-activator 1 is fixed, the second end is as fulcrum and the described rocking arm of rocking arm
Being in transmission connection, described piezo-activator 1 can occur flexible when the change in voltage of voltage-adjustable power, drives propping up of described rocking arm
Point moves up and down, it is possible to be adjusted valve clearance.Overcome in prior art and by manpower intervention, valve clearance is carried out
Wasting time and energy during regulation, cost of labor is high, and is difficult to meet the defect of the properly functioning demand of electromotor.
In one embodiment of the invention, described automatic adjusting mechanism also includes housing 2 and the drive mechanism being fixedly installed
3, the one end open of described housing 2, described piezo-activator 1 and described drive mechanism 3 are by the open end of described housing 2 successively
It is arranged in described housing 2, and the end thereof contacts that the first end of described piezo-activator 1 is relative with the open end of described housing 2
Connect, the second end is connected near the end thereof contacts of described piezo-activator 1 with described drive mechanism 3, described drive mechanism 3 away from
One end of described piezo-activator 1 is stretched out described housing 2 outside and is connected with described rocking-arm driving.
By arranging housing 2 and drive mechanism 3, and described piezo-activator 1 and described drive mechanism 3 are arranged on described
In housing 2 so that the second end of described piezo-activator 1 can pass through on drive mechanism 3 away from the one of described piezo-activator 1
End stretches out described housing 2 outside and is connected with described rocking-arm driving, it is possible to avoid described piezo-activator 1 to carry out directly with described rocking arm
Described piezo-activator 1 is caused abrasion by contact.
Wherein, the structure of described drive mechanism 3 is not limited, as long as when described piezo-activator 1 occurs flexible, energy
Described drive mechanism 3 is enough promoted to move up and down.
In another embodiment of the present invention, described drive mechanism 3 includes: pressure-bearing body 31 and supporter 32, described pressure-bearing body
31 and described supporter 32 be arranged in successively in described housing 2 by the open end of described housing 2, the first of described pressure-bearing body 31
End is connected with the second end in contact of described piezo-activator 1, and the second end of described pressure-bearing body 31, described supporter 32 are near described
One end and the described housing 1 of piezo-activator 1 enclose hydraulic cavities 33.
In embodiments of the present invention, by arranging hydraulic cavities 33, described hydraulic cavities between supporter 32 and pressure-bearing body 31
33 can filling liquid force feed, use rigid body with described drive mechanism 3 compared with, it is possible to will act on the side on described drive mechanism 3
Balance out to stress so that act on the lateral stress on described pressure actuator 1 close to zero such that it is able to preferably avoid
Described piezo-activator 1 is damaged by lateral stress.
In one embodiment of the invention, described hydraulic cavities 33 is less than institute away from the diameter of one end of described piezo-activator 1
State the hydraulic cavities 33 diameter near one end of described piezo-activator 1.
Use this structure, it is possible to produced by described piezo-activator 1 flexible carries out stroke amplification.
Preferably, it is provided with pressure transducer 34 at the preset height of described hydraulic cavities 33.By setting at preset height
Put pressure transducer 34, it is possible to the force value at described preset height is detected, and then between valve clearance can being carried out
Connect detection.
Wherein, the set-up mode of described pressure transducer 34 is not limited, as long as can be by described pressure transducer 34
It is fixed at described preset height.
In one embodiment of the invention, described pressure transducer 34 includes test side, housing 2 side at described preset height
Offering through hole on wall, the test side of described pressure transducer 34 is positioned at described hydraulic cavities 33 through described through hole, and with institute
The edge seal stating through hole connects.
In embodiments of the present invention, described pressure transducer 34 is fixed at described preset height, it is possible to described pre-
If the criterion that highly detected pressure value at place changes as valve clearance such that it is able to valve clearance is carried out more accurately
Regulation.
Wherein, the concrete structure of described piezo-activator 1 is not limited.
In one embodiment of the invention, described piezo-activator 1 is constituted by multilayer piezoelectric ceramic sheet is stacked.
On the other hand, the embodiment of the present invention provides the valve actuating mechanism of a kind of electromotor, sees Fig. 2 and Fig. 3, including valve group
01 and valve transmission group 001；
Described valve train group 001 includes rocking arm 10, overhead camshaft 11 and automatic adjusting mechanism as above
12；
Seeing Fig. 2, described overhead camshaft 11 is arranged on the top of described rocking arm 10, and with the middle part of described rocking arm 10
Being in transmission connection, the upper end of described valve group 01 is flexibly connected with one end of described rocking arm 10, the conduct of described automatic adjusting mechanism 12
One end of the fulcrum of rocking arm 10 is flexibly connected with the other end of described rocking arm 10；
Or, see Fig. 3, described overhead camshaft 11 is arranged on the lower section of described rocking arm 10, and with described rocking arm 10
One end be flexibly connected, the upper end of described valve group 01 is flexibly connected with the other end of described rocking arm 10, described automatic regulating machine
Structure 12 is flexibly connected with the middle part of described rocking arm 10 as one end of the fulcrum of rocking arm 10.
The embodiment of the present invention provides the valve actuating mechanism of a kind of electromotor, by arranging pressure in overhead cam shaft generator
Electric actuator 1, and the first end of piezo-activator 1 is fixed, the second end passes with described rocking arm 10 as the fulcrum of rocking arm 10
Being dynamically connected, described piezo-activator 1 can occur flexible when the change in voltage of voltage-adjustable power, drives propping up of described rocking arm 10
Point moves up and down, it is possible to be adjusted valve clearance.Overcome in prior art and by manpower intervention, valve clearance is carried out
Wasting time and energy during regulation, cost of labor is high, and is difficult to meet the defect of the properly functioning demand of electromotor.
Wherein, when described overhead camshaft 11 is arranged on the top of described rocking arm 10, and with the middle part of described rocking arm 10
When being in transmission connection, described overhead camshaft 11 directly middle part with described rocking arm 10 can contact connection, or, described rocking arm
The middle part of 10 is provided with rolling bearing, and described overhead camshaft 11 can contact connection with described rolling bearing, in such manner, it is possible to
Reduce the abrasion to described rocking arm 10.Same, when described overhead camshaft 11 is arranged on the lower section of described rocking arm 10, and with
When one end of described rocking arm 10 is in transmission connection, described overhead camshaft 11 can directly with the end thereof contacts of described rocking arm 10 even
Connect, or, one end of described rocking arm 10 is provided with rolling bearing, and described overhead camshaft 11 can be accepted with described rotary shaft
Touch and connect, in such manner, it is possible to reduce the abrasion to described rocking arm 10.
Wherein, to described drive mechanism 3 away from one end and the described rocking arm 10 of described piezo-activator 1 connected mode not
Limit, as long as described rocking arm 10 can be put for fulcrum with described drive mechanism 3 away from one end of described piezo-activator 1
Dynamic.
Preferably, described drive mechanism 3 away from one end and the described rocking arm 10 of described piezo-activator 1 by convex spherical and
Concave spherical surface is connected.
On the other hand, the embodiment of the present invention provides a kind of electromotor, including cylinder and valve actuating mechanism as above, institute
State rocking arm and be arranged on the top of described cylinder；
Described overhead camshaft is arranged on the top of described rocking arm, and is in transmission connection with the middle part of described rocking arm, described
Automatic adjusting mechanism is arranged between the upper cylinder cover of described rocking arm and described cylinder, and the fixing end of described automatic adjusting mechanism with
The contact of described upper cylinder cover connects；Or,
Described overhead camshaft is arranged on the lower section of described rocking arm, and is flexibly connected with one end of described rocking arm, described
Automatic adjusting mechanism is arranged on the top of described rocking arm.
The embodiment of the present invention provides a kind of electromotor, by arranging piezo-activator in overhead cam shaft generator,
And the first end of piezo-activator is fixed, the second end is connected with described rocking-arm driving as the fulcrum of rocking arm, described piezoelectricity
Actuator can occur flexible when the change in voltage of voltage-adjustable power, drives the fulcrum of described rocking arm to move up and down, it is possible to right
Valve clearance is adjusted.Overcome and waste time and energy when valve clearance is adjusted by manpower intervention by prior art, people
Work cost is high, and is difficult to meet the defect of the properly functioning demand of electromotor.
Another further aspect, the embodiment of the present invention provides the Automatic adjustment method of a kind of valve clearance, is applied to as above
Overhead cam shaft generator；Including:
Electromotor runs under default operating mode, is adjusted the output voltage of described voltage-adjustable power so that described
Piezo-activator elongates or shortens, and drives the fulcrum of described rocking arm to move up and down, is adjusted valve clearance.
The embodiment of the present invention provides the Automatic adjustment method of a kind of valve clearance, by making electromotor transport under default operating mode
OK, along with the prolongation of the time of operation, valve clearance can change, or, need under different rotating speeds under default operating mode
Different valve clearancies is to improve the power output of electromotor, by adjusting the output voltage of described voltage-adjustable power
Joint, it is possible to making described piezo-activator occur flexible, so, the fulcrum of described rocking arm can move up and down such that it is able to gas
Door gap is adjusted.Overcome and waste time and energy when valve clearance is adjusted by manpower intervention by prior art, manually
Cost is high, and is difficult to meet the defect of the properly functioning demand of electromotor.
In one embodiment of the invention, described in make electromotor also include before running under default operating mode:
Presetting under valve clearance first, simulated engine runs under some groups of different rotating speeds, respectively at each not
By described pressure transducer, the force value at described preset height is detected under same rotating speed, obtain the rotating speed of electromotor
And the functional relationship between the pressure at valve clearance and described preset height.
By obtaining the functional relationship between the pressure at the rotating speed of electromotor and valve clearance and described preset height,
When valve clearance changes, also can change for the pressure at the described preset height corresponding to different rotating speeds, from
And it is capable of the detection to valve clearance.
In another embodiment of the present invention, the described output voltage to described voltage-adjustable power is adjusted specifically wrapping
Include:
Determine the real-time rotating speed of described electromotor, preset valve clearance according to described functional relationship with second to obtain this real-time
The force value at described preset height that rotating speed is corresponding at any time, and according to described pressure transducer detected real-time
Deviation between pressure and described force value calculates the magnitude of voltage eliminated corresponding to this deviation, regulates described voltage variable power supplies
Output voltage is equal to described magnitude of voltage.
In embodiments of the present invention, it is determined by the real-time rotating speed of described electromotor, and by setting between certain valve
Gap, calculates the force value at the described preset height corresponding to this real-time rotating speed according to described functional relationship, meanwhile, by described pressure
The real-time pressure that force transducer is detected compares with calculating the force value obtained, if there is deviation, then between explanation valve
Gap is not equal to set valve clearance, so, be calculated the magnitude of voltage eliminated corresponding to this deviation by described deviation, and regulate
The output voltage of described voltage variable power supplies is equal to described magnitude of voltage, it is possible to be modified described functional relationship such that it is able to
Valve clearance is adjusted so that described valve clearance is set valve clearance.
In one embodiment of the invention, described second presets the initial valve clearance that valve clearance is described electromotor.If
Described electromotor runs under constant rotating speed, then along with the prolongation of the time of operation, between valve and drive disk assembly, abrasion makes
Valve clearance diminishes, at this moment, and the initial valve clearance that valve clearance can be made to be described electromotor by valve gap adjustment,
To eliminate the change of the valve timing that valve clearance change is brought.
Or, described second preset valve clearance according to the valve clearance of real-time speed setting of described electromotor.If
Described electromotor runs under different rotating speeds, then under different rotating speeds, in order to realize the maximization of engine power output,
Valve clearance difference (such as, can have been wished when low engine speed is run to increase valve clearance, transport in described high engine speeds
Wish during row to reduce valve clearance), at this moment, valve clearance can be made to be that the valve clearance set is come by valve gap adjustment
Realize.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (15)
1. the automatic adjusting mechanism of a valve clearance, it is characterised in that be applied to overhead cam shaft generator, including:
Piezo-activator, described piezo-activator includes the first end and the second end being oppositely arranged, the of described piezo-activator
One end is fixed, and the second end is connected with rocking-arm driving for the fulcrum as rocking arm；
First end and second end of described piezo-activator electrically connect with voltage-adjustable power respectively, and described piezo-activator can be
The output voltage of described voltage-adjustable power elongates or shortens when changing, and drives the fulcrum of described rocking arm to move up and down, right
Valve clearance is adjusted.
Automatic adjusting mechanism the most according to claim 1, it is characterised in that
Described automatic adjusting mechanism also includes housing and the drive mechanism being fixedly installed, and the one end open of described housing is described
Piezo-activator and described drive mechanism are arranged in described housing successively by the open end of described housing, and described piezoelectricity causes
The end thereof contacts that first end of dynamic device is relative with the open end of described housing connects, and the second end and described drive mechanism are near described
The end thereof contacts of piezo-activator connects, and described drive mechanism stretches out described hull outside away from one end of described piezo-activator
It is flexibly connected with described rocking arm.
Automatic adjusting mechanism the most according to claim 2, it is characterised in that
Described drive mechanism includes pressure-bearing body and supporter, described pressure-bearing body and the described supporter open end by described housing
Being arranged in successively in described housing, the first end of described pressure-bearing body is connected with the second end in contact of described piezo-activator, described
Second end of pressure-bearing body, described supporter enclose hydraulic cavities near one end of described piezo-activator and described housing.
Automatic adjusting mechanism the most according to claim 3, it is characterised in that
Described hydraulic cavities is less than described hydraulic cavities near described piezo-activator away from the diameter of one end of described piezo-activator
The diameter of one end.
Automatic adjusting mechanism the most according to claim 3, it is characterised in that
It is provided with pressure transducer at the preset height of described hydraulic cavities.
Automatic adjusting mechanism the most according to claim 5, it is characterised in that
Described pressure transducer includes test side, and the housing sidewall at described preset height offers through hole, and described pressure passes
The test side of sensor is positioned at described hydraulic cavities through described through hole, and is connected with the edge seal of described through hole.
Automatic adjusting mechanism the most according to claim 1, it is characterised in that
Described piezo-activator is constituted by multilayer piezoelectric ceramic sheet is stacked.
8. the valve actuating mechanism of an electromotor, it is characterised in that include valve group and valve transmission group；
Described valve train group includes rocking arm, overhead camshaft and being automatically adjusted as described in any one of claim 1-7
Mechanism；
Described overhead camshaft is arranged on the top of described rocking arm, and is in transmission connection with the middle part of described rocking arm, described valve
The upper end of group is flexibly connected with one end of described rocking arm, as one end of fulcrum of rocking arm with described on described automatic adjusting mechanism
The other end of rocking arm is flexibly connected；
Or, described overhead camshaft is arranged on the lower section of described rocking arm, and is flexibly connected with one end of described rocking arm, described
The upper end of valve group is flexibly connected with the other end of described rocking arm, as one end of fulcrum of rocking arm on described automatic adjusting mechanism
It is flexibly connected with the middle part of described rocking arm.
Valve actuating mechanism the most according to claim 8, it is characterised in that
Described drive mechanism is connected by convex spherical and concave spherical surface with described rocking arm away from one end of described piezo-activator.
10. an electromotor, it is characterised in that include cylinder and the valve actuating mechanism as described in any one of claim 8-9, institute
State rocking arm and be arranged on the top of described cylinder；
Described overhead camshaft is arranged on the top of described rocking arm, and is in transmission connection with the middle part of described rocking arm, described automatically
Governor motion is arranged between the upper cylinder cover of described rocking arm and described cylinder, and the fixing end of described automatic adjusting mechanism is with described
Upper cylinder cover contact connects；Or,
Described overhead camshaft is arranged on the lower section of described rocking arm, and when being flexibly connected with one end of described rocking arm, described from
Dynamic governor motion is arranged on the top of described rocking arm.
The Automatic adjustment method of 11. 1 kinds of valve clearancies, it is characterised in that be applied to electromotor as claimed in claim 10；
Including:
Electromotor runs under default operating mode, is adjusted the output voltage of described voltage-adjustable power so that described piezoelectricity
Actuator elongates or shortens, and drives the fulcrum of described rocking arm to move up and down, is adjusted valve clearance.
12. Automatic adjustment method according to claim 11, it is characterised in that
Described electromotor is made also to include before running under default operating mode:
Presetting under valve clearance first, simulated engine runs under some groups of different rotating speeds, different at each respectively
By described pressure transducer, the force value at described preset height is detected under rotating speed, obtain rotating speed and the gas of electromotor
The functional relationship between pressure at door gap and described preset height.
13. Automatic adjustment method according to claim 12, it is characterised in that
The described output voltage to described voltage-adjustable power is adjusted specifically including:
Determine the real-time rotating speed of described electromotor, preset valve clearance according to described functional relationship with second and obtain this real-time rotating speed
The force value at described preset height corresponding at any time, and the real-time pressure detected according to described pressure transducer
And the deviation between described force value calculates the magnitude of voltage eliminated corresponding to this deviation, regulates the output of described piezoelectricity variable power supply
Voltage is equal to described magnitude of voltage.
14. Automatic adjustment method according to claim 13, it is characterised in that
Described second presets the initial valve clearance that valve clearance is described electromotor.
15. Automatic adjustment method according to claim 13, it is characterised in that
Described second preset valve clearance according to the valve clearance of real-time speed setting of described electromotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610757733.9A CN106246276A (en) | 2016-08-29 | 2016-08-29 | The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610757733.9A CN106246276A (en) | 2016-08-29 | 2016-08-29 | The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106246276A true CN106246276A (en) | 2016-12-21 |
Family
ID=57596780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610757733.9A Pending CN106246276A (en) | 2016-08-29 | 2016-08-29 | The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246276A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761866A (en) * | 2019-12-25 | 2020-02-07 | 潍柴动力股份有限公司 | Method and system for evaluating valve clearance adjustment period |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050066919A1 (en) * | 2003-09-30 | 2005-03-31 | Shinogle Ronald D. | System and method for actuating an engine valve |
| CN101086212A (en) * | 2007-06-04 | 2007-12-12 | 奇瑞汽车有限公司 | Engine air valve device capable of controlling cylinder ceasing |
| CN103953415A (en) * | 2014-04-08 | 2014-07-30 | 天津大学 | Novel piezoelectric stepless variable valve mechanism based on inverse piezoelectric effect |
| CN105156166A (en) * | 2015-08-17 | 2015-12-16 | 天津大学 | Piezo-electric crystal electronic control hydraulic rapid VVT and VVL device and control method thereof |
-
2016
- 2016-08-29 CN CN201610757733.9A patent/CN106246276A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050066919A1 (en) * | 2003-09-30 | 2005-03-31 | Shinogle Ronald D. | System and method for actuating an engine valve |
| US20050274342A1 (en) * | 2003-09-30 | 2005-12-15 | Caterpillar Inc. | System and method for actuating an engine valve |
| CN101086212A (en) * | 2007-06-04 | 2007-12-12 | 奇瑞汽车有限公司 | Engine air valve device capable of controlling cylinder ceasing |
| CN103953415A (en) * | 2014-04-08 | 2014-07-30 | 天津大学 | Novel piezoelectric stepless variable valve mechanism based on inverse piezoelectric effect |
| CN105156166A (en) * | 2015-08-17 | 2015-12-16 | 天津大学 | Piezo-electric crystal electronic control hydraulic rapid VVT and VVL device and control method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761866A (en) * | 2019-12-25 | 2020-02-07 | 潍柴动力股份有限公司 | Method and system for evaluating valve clearance adjustment period |
| CN110761866B (en) * | 2019-12-25 | 2020-05-01 | 潍柴动力股份有限公司 | Method and system for evaluating valve clearance adjustment period |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9091204B2 (en) | Internal combustion engine having piston with piston valve and associated method | |
| US10385797B2 (en) | Linear motor valve actuator system and method for controlling valve operation | |
| KR20100053461A (en) | Variable valve driving device of internal combustion engine | |
| US20060096560A1 (en) | Engine valve actuation system | |
| JP5864820B2 (en) | Piston-train guide apparatus and method | |
| JP4779775B2 (en) | Intake control device for internal combustion engine | |
| EP2677142A1 (en) | Method and device for controlling the operation of dual-fuel engine | |
| CN106246276A (en) | The automatic adjusting mechanism of a kind of valve clearance and Automatic adjustment method | |
| CN104121054A (en) | Piston engine valve timing and variable lift driving system | |
| US8881703B2 (en) | Apparatus for actuating at least one outlet valve of a valve-controlled internal combustion engine | |
| US9091218B2 (en) | Valve train and method for control time variation | |
| RU2708191C2 (en) | Piston internal combustion engine with variable stroke of piston and method for operation thereof | |
| CN206111260U (en) | Piezoelectricity driven tappet formula does not have camshaft valve actuating mechanism | |
| CN106321178A (en) | Push rod of engine, engine and automatic adjusting method for valve gap | |
| EP3073071A1 (en) | Camshaft torque based valve timing adjustment | |
| KR101886051B1 (en) | Systematic change valve lift device | |
| CN206054024U (en) | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism | |
| KR102148096B1 (en) | An electronic control type variable valve timing apparatus for engine | |
| JP4385585B2 (en) | Internal combustion engine | |
| KR102223439B1 (en) | Flexible cam technology | |
| CN103912328A (en) | Swing arm and variable valve lift drive device with swing arm | |
| KR101222158B1 (en) | Measuring system for cap shim assembly system for the CVVL engine | |
| JP5284879B2 (en) | Valve control device for gas exchange valve in internal combustion engine | |
| KR0134991B1 (en) | Intake/exhaust valve apparatus of internal combustion engine using piezoelectric actuator | |
| CN107869368A (en) | A kind of fluid pressure type of Piezoelectric Driving is without camshaft valve actuating mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |
|
| RJ01 | Rejection of invention patent application after publication |