CN106150585A - The control method of continuous variable valve lift mechanism and device - Google Patents
The control method of continuous variable valve lift mechanism and device Download PDFInfo
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- CN106150585A CN106150585A CN201510209236.0A CN201510209236A CN106150585A CN 106150585 A CN106150585 A CN 106150585A CN 201510209236 A CN201510209236 A CN 201510209236A CN 106150585 A CN106150585 A CN 106150585A
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Abstract
The control method of the continuous variable valve lift mechanism that the present invention provides and device, it is possible to avoid the confined planes of mechanism, with machinery stop, strong shock occurs, thus reduce the abrasion of the parts to mechanism, it is ensured that the control accuracy of mechanism, promote the sound quality of electromotor.Described method comprises determining that whether valve reaches the first lift or the second lift；Wherein, described first lift is the lift of maximum lift distance the first preset value with described valve, and described second lift is the lift of minimum lift distance the second preset value with described valve；If it is determined that described valve arrives described first lift or described second lift, obtain first rotating speed driving motor of described continuous variable valve lift mechanism, and be the second rotating speed by the adjustment of rotational speed of described driving motor；Wherein, described second rotating speed is less than described first rotating speed.The present invention is applicable to control technical field.
Description
Technical field
The present invention relates to control technical field, particularly to continuous variable valve lift mechanism control method and
Device.
Background technology
Continuous variable valve lift mechanism can make valve stroke realize consecutive variations, therefore phase within the specific limits
Than in conventional variable air valve lift range mechanism, it is the most flexible to the control of air input of engine by air, can effectively drop
Pumping loss under lower part load, thus improve fuel economy.
Due to continuous variable valve lift mechanism structure complexity, electronic control unit (Electronic Control
Unit, ECU) need based on higher mechanism controls precision and air inlet certainty of measurement, could realize valve
The accurate control of lift.And the control method of existing continuous variable valve lift mechanism is in regulation valve stroke
During, for realizing the quick regulation of valve, often make the confined planes of mechanism occur strong with machinery stop
Strong shock.On the one hand, the parts of mechanism can be caused abrasion by this, cause shorten the service life of mechanism,
And the position that mechanism wear can make mechanism's machinery stop in turn offsets, thus cause ECU to machine
The control accuracy of structure reduces.On the other hand, the confined planes of mechanism occurs shock also can make machine with machinery stop
Sound vibration roughness (Noise, Vibration, Harshness, the NVH) problem of structure is serious, NVH performance
Decline.
Summary of the invention
In view of this, it is contemplated that propose control method and the device of continuous variable valve lift mechanism, with
There is strong shock with machinery stop in the confined planes avoiding mechanism, thus reduces the abrasion of the parts to mechanism,
Ensure the control accuracy of mechanism, promote the sound quality of electromotor.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of control method of continuous variable valve lift mechanism, including:
Determine whether valve reaches the first lift or the second lift；Wherein, described first lift is and described gas
The lift of maximum lift distance first preset value of door, described second lift is and the minimum lift of described valve
The lift of distance the second preset value；
If it is determined that described valve arrives described first lift or described second lift, obtain described continuous variable gas
First rotating speed driving motor of door lift mechanisms, and be the second rotating speed by the adjustment of rotational speed of described driving motor；
Wherein, described second rotating speed is less than described first rotating speed.
Further, described method also includes:
Determine described driving motor whether stall；
If it is determined that described driving motor has not stalled at, control described driving motor stepping；
If it is determined that described driving motor rotation blockage, it is judged that whether described continuous variable valve lift mechanism arrives machinery
Stop；
If it is determined that described continuous variable valve lift mechanism arrives machinery stop, control described driving motor and stop
Stepping.
Preferably, described judge described continuous variable valve lift mechanism whether arrive machinery stop include:
Judge the electric current of described driving motor whether more than the first pre-set current value, or maintain second preset electricity
Flow valuve reaches preset duration；If the electric current of described driving motor exceedes described first pre-set current value, or maintains
Described second pre-set current value reaches preset duration, determines that described continuous variable valve lift mechanism only arrives machinery
Point；Otherwise, it determines described continuous variable valve lift mechanism does not arrives machinery stop；
Or,
Detect described driving motor and have attonity, and judge that whether the voltage of described driving motor is at default model
In enclosing；If described driving motor attonity, and the voltage of described driving motor is in described preset range, really
Fixed described continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines described continuous variable valve liter
Journey mechanism does not arrives machinery stop.
Further, described judge described continuous variable valve lift mechanism whether arrive machinery stop after,
Also include:
If it is determined that described continuous variable valve lift mechanism does not arrives machinery stop, determine the first of described valve
Lift direction, controls described driving motor and drives after described valve moves predeterminable range along the second lift direction,
Move along described first lift direction again；Wherein, described first lift direction is for point to from described maximum lift
The direction of described minimum lift or point to the direction of described maximum lift from described minimum lift, described second liter
Cheng Fangxiang is in opposite direction with described first lift；
If described first lift direction is the direction pointing to described minimum lift from described maximum lift, it is judged that institute
State valve and can move to described minimum lift along described first lift direction；Or,
If described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that institute
State valve and can move to described maximum lift along described first lift direction；
If it is determined that described valve can move to described minimum lift along described first lift direction, treat described valve
After moving to described minimum lift, control described driving motor and stop stepping；Or, however, it is determined that described valve can
Described maximum lift is moved to along described first lift direction, after described valve motion to described maximum lift,
Control described driving motor and stop stepping.
Further, described minimum can be moved to along described first lift direction at the described valve of described judgement
Lift, or, can the described valve of described judgement move to described maximum lift along described first lift direction
Afterwards, also include:
If described valve cannot move to described minimum lift along described first lift direction, or, if described gas
Door cannot move to described maximum lift along described first lift direction, starts electromotor described continuously with operating
Variable air valve lift range mechanism；
If described first lift direction is the direction pointing to described minimum lift from described maximum lift, it is judged that institute
State valve and can move to described minimum lift along described first lift direction；Or, if described first lift
Direction is the direction pointing to described maximum lift from described minimum lift, it is judged that can described valve along described the
One lift direction moves to described maximum lift；
If it is determined that described valve can move to described minimum lift along described first lift direction, treat described valve
After moving to described minimum lift, control described driving motor and stop stepping；Or, however, it is determined that described valve can
Described maximum lift is moved to along described first lift direction, after described valve motion to described maximum lift,
Control described driving motor and stop stepping.
In prior art, for realizing the quick regulation of valve, often make confined planes and the machinery stop of mechanism
There is strong shock.On the one hand, the parts of mechanism can be caused abrasion by this, cause the service life of mechanism
Shorten, and the position that mechanism wear can make mechanism's machinery stop in turn offsets, thus cause
The control accuracy of mechanism is reduced by ECU.On the other hand, the confined planes of mechanism occurs to clash into also with machinery stop
The NVH problem that can make mechanism is serious, NVH hydraulic performance decline.And continuous variable valve of the present invention
The control method of lift mechanisms, is determining that valve reaches of maximum lift distance the first preset value with valve
One lift or (close maximum at valve with during the second lift of minimum lift distance second preset value of valve
When lift or minimum lift), first obtain first rotating speed driving motor of continuous variable valve lift mechanism, so
After by drive motor adjustment of rotational speed be the second less rotating speed.Therefore, compared to prior art, the present invention
The control method Neng Shi mechanism of described continuous variable valve lift mechanism mildly arrives machinery stop, thus
There is strong shock with machinery stop in the confined planes avoiding mechanism, reduces the abrasion of the parts to mechanism, protect
The control accuracy of card mechanism, promotes the sound quality of electromotor.
Another object of the present invention is to propose the control device of continuous variable valve lift mechanism, to avoid machine
There is strong shock with machinery stop in the confined planes of structure, thus reduces the abrasion of the parts to mechanism, it is ensured that
The control accuracy of mechanism, promotes the sound quality of electromotor.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of control device of continuous variable valve lift mechanism, including: first determine unit, acquiring unit,
Adjustment unit；
Described first determines unit, is used for determining whether valve reaches the first lift or the second lift；Wherein,
Described first lift is the lift of maximum lift distance the first preset value with described valve, described second lift
For the lift with minimum lift distance second preset value of described valve；
For described first, described acquiring unit, if determining that unit determines that described valve arrives described first lift
Or described second lift, obtain first rotating speed driving motor of described continuous variable valve lift mechanism；
Described adjustment unit, being used for the adjustment of rotational speed of described driving motor is the second rotating speed；Wherein, described
Second rotating speed is less than described first rotating speed.
Further, described device also includes: second determines unit, the first judging unit, the first control list
Unit；
Described second determines unit, is used for determining described driving motor whether stall；
Described first control unit, if determining that unit determines that described driving motor has not stalled at for described second,
Control described driving motor stepping；
Described first judging unit, if determining that unit determines described driving motor rotation blockage for described second, sentences
Whether disconnected described continuous variable valve lift mechanism arrives machinery stop；
Described first control unit, if being additionally operable to described first judging unit to determine described continuous variable valve liter
Journey mechanism arrives machinery stop, controls described driving motor and stops stepping.
Preferably, described first judging unit specifically for:
Judge the electric current of described driving motor whether more than the first pre-set current value, or maintain second preset electricity
Flow valuve reaches preset duration；If the electric current of described driving motor exceedes described first pre-set current value, or maintains
Described second pre-set current value reaches preset duration, determines that described continuous variable valve lift mechanism only arrives machinery
Point；Otherwise, it determines described continuous variable valve lift mechanism does not arrives machinery stop；
Or,
Detect described driving motor and have attonity, and judge that whether the voltage of described driving motor is at default model
In enclosing；If described driving motor attonity, and the voltage of described driving motor is in described preset range, really
Fixed described continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines described continuous variable valve liter
Journey mechanism does not arrives machinery stop.
Further, described device also includes: the 3rd determines unit, the second control unit, the second judgement list
Unit；
Described 3rd determines unit, for judging described continuously variable valve lift at described first judging unit
After whether mechanism arrives machinery stop, if described first judging unit determines described continuously variable valve lift
Mechanism does not arrives machinery stop, determines the first lift direction of described valve；Wherein, described first lift side
Maximum lift described in Xiang Weicong is pointed to the direction of described minimum lift or points to described maximum from described minimum lift
The direction of lift；
Described second control unit, is used for controlling described driving motor and drives described valve along the second lift direction
After motion predeterminable range, then move along described first lift direction, described second lift direction and described first
Lift is in opposite direction；
Described second judging unit, if being described from the sensing of described maximum lift for described first lift direction
The direction of minimum lift, it is judged that can described valve move to described minimum lift along described first lift direction；
Or, if described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that
Can described valve move to described maximum lift along described first lift direction；
Described first control unit, is additionally operable to if it is determined that described valve can move to along described first lift direction
Described minimum lift, after described valve motion to described minimum lift, controls described driving motor and stops step
Enter；Or, however, it is determined that described valve can move to described maximum lift along described first lift direction, treats described
After valve motion extremely described maximum lift, control described driving motor and stop stepping.
Further, described device also includes: start unit；
At described second judging unit, described start unit, for judging that can described valve along described first liter
Cheng Fangxiang moves to described minimum lift, or, described second judging unit judges that can described valve along institute
State after the first lift direction moves to described maximum lift, if described second judging unit determines described valve
Cannot move to described minimum lift or described maximum lift along described first lift direction, start electromotor with
Operate described continuous variable valve lift mechanism；
Described second judging unit, is additionally operable to start electromotor at described start unit and continuously may be used so that operating is described
After air valve variation lift mechanisms, if described first lift direction is to point to described minimum liter from described maximum lift
The direction of journey, it is judged that can described valve move to described minimum lift along described first lift direction；Or,
If described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that described gas
Can door move to described maximum lift along described first lift direction.
The control controlling device and above-mentioned continuous variable valve lift mechanism of described continuous variable valve lift mechanism
Method processed is identical relative to prior art have the advantage that, does not repeats them here.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.At accompanying drawing
In:
Fig. 1 is the structural representation of continuous variable valve lift mechanism；
Fig. 2 is the control method schematic flow sheet of the continuous variable valve lift mechanism described in the embodiment of the present invention
One；
Fig. 3 is the control method schematic flow sheet of the continuous variable valve lift mechanism described in the embodiment of the present invention
Two；
Fig. 4 is the control method schematic flow sheet of the continuous variable valve lift mechanism described in the embodiment of the present invention
Three；
Fig. 5 is the control method schematic flow sheet of the continuous variable valve lift mechanism described in the embodiment of the present invention
Four；
Fig. 6 is the control apparatus structure schematic diagram of the continuous variable valve lift mechanism described in the embodiment of the present invention
One；
Fig. 7 is the control apparatus structure schematic diagram of the continuous variable valve lift mechanism described in the embodiment of the present invention
Two；
Fig. 8 is the control apparatus structure schematic diagram of the continuous variable valve lift mechanism described in the embodiment of the present invention
Three；
Fig. 9 is the control apparatus structure schematic diagram of the continuous variable valve lift mechanism described in the embodiment of the present invention
Four.
Description of reference numerals:
1-drives motor, and 2-controls axle, 3-gear, 4-rotating dog, 5-cam, 6-the first rocking arm, 7-roller,
8-the second rocking arm, 9-roller pin, 10-valve, 11-tappet, 12-rocker-arm roller pin, 13-valve rocker, 14-tooth bar.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment
Can be mutually combined.
It addition, for the ease of the technical scheme clearly describing the embodiment of the present invention, in an embodiment of the present invention,
Have employed the printed words such as " first ", " second " function is carried out with the essentially identical identical entry of effect or similar item
Distinguish, it will be appreciated by those skilled in the art that the printed words such as " first ", " second " not to quantity and perform secondary
Sequence is defined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of example arrangement of the continuous variable valve lift mechanism in the present embodiment is as it is shown in figure 1, it wraps
Including cam 5, and cam 5 is connected with the roller 7 in the first rocking arm 6, one end of the first rocking arm 6 is connected to
On rocker-arm roller pin 12, the other end is connected on the second rocking arm 8 by roller pin 9, and the second rocking arm 8 shakes with valve
Arm 13 is connected by rocker-arm roller pin 12；One end of valve rocker 13 connects valve 10, and the other end is by tappet 11
Jack-up；Rocker-arm roller pin 12 is connected by the first rocking arm 6 with roller pin 9, is provided with slide rail on the second rocking arm 8,
Roller pin 9 and rocker-arm roller pin 12 can on the slide rail of the second rocking arm 8 synchronous slide；Second rocking arm 8 is by rotating
Pin 4 is connected with tooth bar 14, and tooth bar 14 engages with gear 3, and gear 3 is connected with controlling axle 2, controls axle
2 are connected with driving motor 1.
Its operation principle is as follows: when valve stroke one timing, cam 5 drives roller 7 to rotate around rotating dog 4
Swinging, roller 7 drives the second rocking arm 8 to swing with rotating dog 4 for center of rotation by roller pin 9, and second
Rocking arm 8 drives rocker-arm roller pin 12, thus drives valve rocker 13 to rotate around the summit of tappet 11, and then drives
Valve 10 is with appropriate lift period ground opening and closing；When the operating point of electromotor changes, ECU sends out
Go out instruction, control to drive motor 1 to start.Drive motor 1 to drive control axle 2 to move, control axle 2 and pass through
Gear 3 and tooth bar 14 pass motion to rotating dog 4, so that rotating dog 4 synchronizing moving, and rocker-arm roller pin
12 and roller pin 9 position keep constant, roller pin 9 center be equivalent to lever control end, rotating dog 4
Center is equivalent to fulcrum, and rocker-arm roller pin 12 center is equivalent to intermediate point, at the control end (roller pin 9) of lever
Invariant position, fulcrum (rotating dog 4) position can timing, the range of intermediate point (rocker-arm roller pin 12) is (i.e.
The lift of valve 12) will change, i.e. realize variable valve lift.
Certainly, the one that the only embodiment of the present invention of the continuous variable valve lift mechanism shown in Fig. 1 is given is shown
Example structure, the structure of the continuous variable valve lift mechanism described in the embodiment of the present invention can also have other
Form, this is not especially limited by the embodiment of the present invention.
Fig. 2 show the control method of a kind of continuous variable valve lift mechanism that the embodiment of the present invention provides
Schematic flow sheet, sees Fig. 2, and described method includes:
S201, the control device of continuous variable valve lift mechanism determine whether valve reaches the first lift or
Two lifts, wherein, the first lift is the lift of maximum lift distance the first preset value with valve, second liter
Journey is the lift of minimum lift distance the second preset value with valve.
It should be noted that the soft degree of regulation and governing speed need to be considered to the first preset value and second
Preset value carries out value, specifically can be configured in conjunction with practical experience, and the value of the two can be identical, also
Can be different, this is not especially limited by the embodiment of the present invention.Preferably, the first preset value and the second preset value
It is specifically as follows 1～2mm.
It addition, it should be noted that, lift range sensor can be installed in mechanism, be judged by lift range sensor
Whether valve reaches the first lift/the second lift.Specifically, can pre-recorded valve in maximum lift/minimum
The voltage that during lift, lift range sensor detects, during valve motion, obtains lift range sensor inspection in time
The voltage surveyed, and poor with pre-recorded voltage, if the two difference is in default scope, then show gas
Door reaches the first lift/the second lift.
Herein, the embodiment of the present invention additionally provides another and judges whether valve reaches the first lift/the second liter
The method of journey: the number of steps that acquisition valve moves to maximum lift driving motor from minimum lift in advance (is designated as
N), and by the first preset value/the second preset value it is scaled the corresponding number of steps driving motor (to be designated as respectively
M/n), when driving motor to drive valve motion, the accumulative number of steps (being designated as M) driving motor, and sentence
Whether disconnected N-M is equal to m/n, if, then it represents that valve has reached the first lift/the second lift.
S202 is if it is determined that valve arrives the first lift or the second lift, the control of continuous variable valve lift mechanism
Device processed obtains first rotating speed driving motor of continuous variable valve lift mechanism, and will drive turning of motor
Speed is adjusted to the second rotating speed, and wherein, the second rotating speed is less than the first rotating speed.
That is, when valve is close to maximum lift or minimum lift, by reducing the rotating speed driving motor so that machine
Structure smoothly arrives machinery stop, thus avoids the confined planes of mechanism, with machinery stop, strong shock occurs.
Concrete, when valve is close to maximum lift or minimum lift, the rotating speed driving motor can be reduced to
1/5 originally～1/15, the i.e. second rotating speed is specifically as follows the 1/5～1/15 of the first rotating speed.Certainly, the present invention
In the control method of the continuous variable valve lift mechanism described in embodiment, it is possible to do not obtain the first rotating speed, and
It is to prestore the second rotating speed (specifically can be obtained by experience), is rising close to maximum lift or minimum at valve
Cheng Shi, is the second rotating speed prestored by the adjustment of rotational speed of driving motor, and this is not made specifically by the embodiment of the present invention
Limit.
Further, as it is shown on figure 3, the control of continuous variable valve lift mechanism described in the embodiment of the present invention
Method processed can also include:
S203, the control device of continuous variable valve lift mechanism determine driving motor whether stall.
S204 is if it is determined that drive motor to have not stalled at, and the control device of continuous variable valve lift mechanism controls to drive
Galvanic electricity machine stepping.
S205 is if it is determined that drive motor rotation blockage, and the control device of continuous variable valve lift mechanism judges continuously
Whether variable air valve lift range mechanism arrives machinery stop.
S206 is if it is determined that continuous variable valve lift mechanism arrives machinery stop, continuously variable valve lift machine
The control device of structure controls to drive motor to stop stepping.
In prior art, when abrasion occur in the parts of mechanism, MECHANISM PRECISION can decline therewith, cause machine
The mechanical stop of structure offsets, and machinery stop will certainly cause mechanism to liter process control after offseting
Accuracy declines.And the control method of the continuous variable valve lift mechanism described in the embodiment of the present invention, pass through
Moment, whether testing agency there is stall, after determining that mechanism has not stalled at, controlled to drive motor to continue stepping,
So can ensure that mechanism can arrive the mechanical stop of reality, and then ensure to rise the accuracy of process control, with
Time be that later stage mechanism's self-inspection provides safeguard.
It should be noted that one with ordinary skill in the art would appreciate that when mechanism arrives machinery stop,
Drive motor that stall can occur, on the one hand, after stall, supply current can increase accordingly, so that ECU bears
(i.e. there is overload) in high current load, causes ECU overheated, ECU is caused damage；On the other hand, stifled
The change of team makes the axial force driving motor increase, if lasting stall will result in driving motor performance and declines.
And the control method of the continuous variable valve lift mechanism described in the embodiment of the present invention, by timely testing agency
State, decision mechanism whether arrive machinery stop, mechanism arrive machinery stop after, in time control drive
Motor stop stepping, thus avoid mechanism's clamping stagnation in machinery stop, and then extend ECU service life, carry
Rise the performance of driving motor.
Preferably, in step S205, the control device of continuous variable valve lift mechanism judges continuous variable gas
Whether door lift mechanisms arrives machinery stop specifically may include that
The device that controls of continuous variable valve lift mechanism judges to drive whether the electric current of motor is preset more than first
Current value, or maintain the second pre-set current value and reach preset duration；If the electric current driving motor is pre-more than first
If current value, or maintain the second pre-set current value and reach preset duration, determine continuous variable valve lift mechanism
Arrive machinery stop；Otherwise, it determines continuous variable valve lift mechanism does not arrives machinery stop；
Or,
The control device detection of continuous variable valve lift mechanism drives motor to have attonity, and judges to drive
Whether the voltage of motor is in preset range；If driving motor attonity, and the voltage of motor is driven to preset
In the range of, determine that continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines continuous variable valve
Lift mechanisms does not arrives machinery stop.
Wherein it is desired to explanation, it will appreciated by the skilled person that and different mechanisms is existed
Different applied environments, the first predetermined current, the second predetermined current and the value of preset duration also differ,
Specifically by experiment or empirically can obtain, this is not especially limited by the embodiment of the present invention.Exemplary,
First predetermined current can be 50A, and the second predetermined current can be 30A, and preset duration can be 10ms.
It should be noted that when mechanism arrives machinery stop, drive motor that stall can occur, on the one hand,
After stall, supply current can increase accordingly, so that ECU bears high current load (overload i.e. occur), leads
Cause ECU overheated, ECU is caused damage；On the other hand, stall can make the axial force driving motor increase
Add, if continuing stall to will result in driving motor performance decline.Continuous variable described in the embodiment of the present invention
Whether the control method of air valve lift range mechanism, arrive machinery by the state of timely testing agency, decision mechanism
Stop, after mechanism arrives machinery stop, controls in time to drive motor to stop stepping, thus avoids mechanism to block
Stagnant in machinery stop, and then extend the service life of ECU, promote the performance driving motor.
Further, as shown in Figure 4, the control of the continuous variable valve lift mechanism described in the embodiment of the present invention
Method processed, whether the control device at continuous variable valve lift mechanism judges continuous variable valve lift mechanism
After arriving machinery stop (i.e. S205), it is also possible to including:
S207 is not if it is determined that continuous variable valve lift mechanism arrives machinery stop, continuously variable valve lift
The device that controls of mechanism determines the first lift direction of valve, controls to drive motor to drive valve along the second lift
After direction motion predeterminable range, then move along the first lift direction；Wherein, the first lift direction is from maximum
Lift point to minimum lift direction or from minimum lift point to maximum lift direction, the second lift direction with
First lift is in opposite direction.
If S208a the first lift direction is the direction pointing to minimum lift from maximum lift, continuous variable valve
The control device of lift mechanisms judges that can valve move to minimum lift along the first lift direction.
Or,
If S208b the first lift direction is the direction pointing to maximum lift from minimum lift, continuous variable valve
The control device of lift mechanisms judges that can valve move to maximum lift along the first lift direction.
S209, if it is determined that valve can move to minimum lift along the first lift direction, treats that valve motion is to minimum
After lift, the control device of continuous variable valve lift mechanism controls to drive motor to stop stepping；Or, if really
Determine valve and can move to maximum lift along described first lift direction, after valve motion to maximum lift, even
The control device of continuous variable air valve lift range mechanism controls to drive motor to stop stepping.
That is, mechanism's clamping stagnation is caused when external cause (such as the foreign body such as impurity, dust) so that mechanism does not arrives
When i.e. there is stall in machinery stop, can be first by mechanism's return (regulating certain distance the most in the opposite direction), so
After be further continued for along the regulation of original direction.If valve adjustments to maximum lift or minimum lift (can be depended on
The direction of motion of valve before clamping stagnation), then show to be shaken off by the foreign body causing clamping stagnation by return, mechanism can
Run well；Otherwise, show foreign body still suffer from mechanism within, mechanism can not run well.
Further, as it is shown in figure 5, the control of continuous variable valve lift mechanism described in the embodiment of the present invention
At the control device of continuous variable valve lift mechanism, method processed judges that can valve move along the first lift direction
To minimum lift, or, the control device of continuous variable valve lift mechanism judges that can valve along first liter
After Cheng Fangxiang moves to maximum lift, it is also possible to including:
If S210 valve cannot move to minimum lift along the first lift direction, or, if valve cannot be along
One lift direction moves to maximum lift, the control device of continuous variable valve lift mechanism start electromotor with
Operating continuous variable valve lift mechanism.
Afterwards, the control device of continuous variable valve lift mechanism judges that can valve along the first lift direction again
Move to minimum lift or can valve move to maximum lift along the first lift direction, if permissible, treat valve
When moving to minimum lift or maximum lift, the control device of continuous variable valve lift mechanism controls to drive electricity
Machine stops stepping.
That is, when still cannot shake off the foreign body causing clamping stagnation after by mechanism's return, can be by starting electromotor
Works, due to the moment operated in mechanism, in-house can produce bigger vibrations, and mechanism is each simultaneously
Lubricity between part is preferable, therefore often can solve mechanism's clamping stagnation by works so that it is normal
Operating.
In prior art, for realizing the quick regulation of valve, often make confined planes and the machinery stop of mechanism
There is strong shock.On the one hand, the parts of mechanism can be caused abrasion by this, cause the service life of mechanism
Shorten, and the position that mechanism wear can make mechanism's machinery stop in turn offsets, thus cause
The control accuracy of mechanism is reduced by ECU.On the other hand, the confined planes of mechanism occurs to clash into also with machinery stop
The NVH problem that can make mechanism is serious, NVH hydraulic performance decline.
And the control method of continuous variable valve lift mechanism of the present invention, determining that valve reaches and gas
First lift of maximum lift distance first preset value of door or with minimum lift distance second preset value of valve
The second lift time (when valve is close to maximum lift or minimum lift), first obtain continuous variable valve liter
First rotating speed driving motor of journey mechanism, then the adjustment of rotational speed by driving motor is the second less rotating speed.
Therefore, compared to prior art, the control method of continuous variable valve lift mechanism of the present invention can make
Mechanism mildly arrives machinery stop, thus avoids the confined planes of mechanism, with machinery stop, strong shock occurs,
Reduce the abrasion of the parts to mechanism, it is ensured that the control accuracy of mechanism, promote the sound quality of electromotor.
Meanwhile, in prior art, when abrasion occur in the parts of mechanism, MECHANISM PRECISION can decline therewith,
The mechanical stop causing mechanism offsets, and machinery stop will certainly cause mechanism to lift after offseting
The accuracy controlled declines.And the control method of the continuous variable valve lift mechanism described in the embodiment of the present invention,
By the moment, whether testing agency there is stall, after determining that mechanism has not stalled at, controls to drive motor persistently to walk
Enter, so can ensure that mechanism can arrive the mechanical stop of reality, and then ensure to rise the accuracy of process control,
Provide safeguard for later stage mechanism's self-inspection simultaneously.
It addition, when mechanism arrives machinery stop, drive motor that stall can occur, on the one hand, to supply after stall
Electricity electric current can increase accordingly, so that ECU bears high current load (overload i.e. occur), causes ECU mistake
Heat, causes damage to ECU；On the other hand, stall can make the axial force driving motor increase, if held
Continuous stall will result in driving motor performance and declines.Continuously variable valve lift machine described in the embodiment of the present invention
Whether the control method of structure, arrive machinery stop by the state of timely testing agency, decision mechanism, at machine
After structure arrives machinery stop, control in time to drive motor to stop stepping, thus avoid mechanism's clamping stagnation to stop in machinery
Point, and then extend the service life of ECU, promote the performance driving motor.
Fig. 6 show the control device 60 of a kind of continuous variable valve lift mechanism that the embodiment of the present invention provides
Structural representation, see Fig. 6, described device includes: first determine unit 601, acquiring unit 602,
Adjustment unit 603.
Wherein, first determines unit 601, is used for determining whether valve reaches the first lift or the second lift；
Wherein, the first lift is the lift of maximum lift distance the first preset value with valve, and the second lift is and gas
The lift of minimum lift distance second preset value of door.
For first, acquiring unit 602, if determining that unit 601 determines that valve arrives the first lift or second liter
Journey, obtains first rotating speed driving motor of continuous variable valve lift mechanism.
Adjustment unit 603, being used for the adjustment of rotational speed by driving motor is the second rotating speed；Wherein, the second rotating speed
Less than the first rotating speed.
Further, as it is shown in fig. 7, the control of continuous variable valve lift mechanism described in the embodiment of the present invention
Device 60 processed can also include: second determines unit the 604, first judging unit the 605, first control unit
606。
Wherein, second determines unit 604, is used for determining driving motor whether stall.
First control unit 606, if determining that unit 604 determines that driving motor has not stalled at for second, controls
Drive motor stepping.
For second, first judging unit 605, if determining that unit 604 determines driving motor rotation blockage, it is judged that even
Whether continuous variable air valve lift range mechanism arrives machinery stop.
First control unit 606, if being additionally operable to the first judging unit 605 to determine continuously variable valve lift machine
Structure arrives machinery stop, controls to drive motor to stop stepping.
Preferably, the first judging unit 605 specifically may be used for:
Judge that the electric current driving motor, whether more than the first pre-set current value, or maintains the second pre-set current value
Reach preset duration；If the electric current of driving motor is more than the first pre-set current value, or maintains the second predetermined current
Value reaches preset duration, determines that continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines continuously may be used
Air valve variation lift mechanisms does not arrives machinery stop；
Or,
Detection drives motor to have attonity, and judges that the voltage driving motor is whether in preset range；If
Drive motor attonity, and drive the voltage of motor in preset range, determine continuously variable valve lift machine
Structure arrives machinery stop；Otherwise, it determines continuous variable valve lift mechanism does not arrives machinery stop.
Further, as shown in Figure 8, the control of the continuous variable valve lift mechanism described in the embodiment of the present invention
Device 60 processed can also include: the 3rd determines unit the 607, second control unit the 608, second judging unit
609。
Wherein, the 3rd determines unit 607, for judging continuous variable valve liter at the first judging unit 605
After whether journey mechanism arrives machinery stop, if the first judging unit 605 determines continuously variable valve lift machine
Structure does not arrives machinery stop, determines the first lift direction of valve；Wherein, the first lift direction is from maximum
Lift is pointed to the direction of minimum lift or points to the direction of maximum lift from minimum lift.
Second control unit 608, is used for controlling to drive motor to drive valve to move default along the second lift direction
After Ju Li, then moving along the first lift direction, the second lift direction is in opposite direction with the first lift.
Second judging unit 609, if being the side pointing to minimum lift from maximum lift for the first lift direction
To, it is judged that can valve move to minimum lift along the first lift direction；Or, if the first lift direction is
The direction of maximum lift is pointed to, it is judged that can valve move to along the first lift direction rise higher most from minimum lift
Journey.
First control unit 606, if being additionally operable to the second judging unit 609 to determine that valve can be along the first lift side
To moving to minimum lift, after valve motion to minimum lift, control to drive motor to stop stepping；Or,
If the second judging unit 609 determines that valve can move to maximum lift along the first lift direction, treat valve motion
To maximum lift, control to drive motor to stop stepping.
Further, as shown in Figure 8, the control of the continuous variable valve lift mechanism described in the embodiment of the present invention
Device 60 processed can also include: start unit 610.
At the second judging unit 609, start unit 610, for judging that can valve along the first lift direction fortune
Move to minimum lift, or, the second judging unit 609 judges that can valve move to along the first lift direction
After maximum lift, if the second judging unit 604 determines that valve cannot move to minimum along the first lift direction
Lift or maximum lift, start electromotor with the continuous variable valve lift mechanism that operates.
Second judging unit 604, is additionally operable to start electromotor with the continuous variable gas that operates at start unit 610
After door lift mechanisms, if the first lift direction is the direction pointing to minimum lift from maximum lift, it is judged that gas
Can door move to minimum lift along the first lift direction；Or, if the first lift direction is from minimum lift
Point to the direction of maximum lift, it is judged that can valve move to maximum lift along the first lift direction.
Concrete, the control device 60 of use continuous variable valve lift mechanism described in the embodiment of the present invention
The method controlling continuous variable valve lift mechanism refers to the aforesaid associated description of the embodiment of the present invention, herein
Repeat no more.
In prior art, for realizing the quick regulation of valve, often make confined planes and the machinery stop of mechanism
There is strong shock.On the one hand, the parts of mechanism can be caused abrasion by this, cause the service life of mechanism
Shorten, and the position that mechanism wear can make mechanism's machinery stop in turn offsets, thus cause
The control accuracy of mechanism is reduced by ECU.On the other hand, the confined planes of mechanism occurs to clash into also with machinery stop
The NVH problem that can make mechanism is serious, NVH hydraulic performance decline.And continuous variable valve of the present invention
The control device of lift mechanisms, is determining that valve reaches of maximum lift distance the first preset value with valve
One lift or (close maximum at valve with during the second lift of minimum lift distance second preset value of valve
When lift or minimum lift), first obtain first rotating speed driving motor of continuous variable valve lift mechanism, so
After by drive motor adjustment of rotational speed be the second less rotating speed.Therefore, compared to prior art, the present invention
The control method Neng Shi mechanism of described continuous variable valve lift mechanism mildly arrives machinery stop, thus
There is strong shock with machinery stop in the confined planes avoiding mechanism, reduces the abrasion of the parts to mechanism, protect
The control accuracy of card mechanism, promotes the sound quality of electromotor.
Meanwhile, in prior art, when abrasion occur in the parts of mechanism, MECHANISM PRECISION can decline therewith,
The mechanical stop causing mechanism offsets, and machinery stop will certainly cause mechanism to lift after offseting
The accuracy controlled declines.And the control device of the continuous variable valve lift mechanism described in the embodiment of the present invention,
By the moment, whether testing agency there is stall, after determining that mechanism has not stalled at, controls to drive motor persistently to walk
Enter, so can ensure that mechanism can arrive the mechanical stop of reality, and then ensure to rise the accuracy of process control,
Provide safeguard for later stage mechanism's self-inspection simultaneously.
It addition, when mechanism arrives machinery stop, drive motor that stall can occur, on the one hand, to supply after stall
Electricity electric current can increase accordingly, so that ECU bears high current load (overload i.e. occur), causes ECU mistake
Heat, causes damage to ECU；On the other hand, stall can make the axial force driving motor increase, if held
Continuous stall will result in driving motor performance and declines.Continuously variable valve lift machine described in the embodiment of the present invention
Whether the control device of structure, arrive machinery stop by the state of timely testing agency, decision mechanism, at machine
After structure arrives machinery stop, control in time to drive motor to stop stepping, thus avoid mechanism's clamping stagnation to stop in machinery
Point, and then extend the service life of ECU, promote the performance driving motor.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (10)
1. the control method of a continuous variable valve lift mechanism, it is characterised in that described method includes:
Determine whether valve reaches the first lift or the second lift；Wherein, described first lift is and described gas
The lift of maximum lift distance first preset value of door, described second lift is and the minimum lift of described valve
The lift of distance the second preset value；
If it is determined that described valve arrives described first lift or described second lift, obtain described continuous variable gas
First rotating speed driving motor of door lift mechanisms, and be the second rotating speed by the adjustment of rotational speed of described driving motor；
Wherein, described second rotating speed is less than described first rotating speed.
Method the most according to claim 1, it is characterised in that described method also includes:
Determine described driving motor whether stall；
If it is determined that described driving motor has not stalled at, control described driving motor stepping；
If it is determined that described driving motor rotation blockage, it is judged that whether described continuous variable valve lift mechanism arrives machinery
Stop；
If it is determined that described continuous variable valve lift mechanism arrives machinery stop, control described driving motor and stop
Stepping.
Method the most according to claim 2, it is characterised in that the described continuous variable valve of described judgement
Whether lift mechanisms arrives machinery stop includes:
Judge the electric current of described driving motor whether more than the first pre-set current value, or maintain second preset electricity
Flow valuve reaches preset duration；If the electric current of described driving motor exceedes described first pre-set current value, or maintains
Described second pre-set current value reaches preset duration, determines that described continuous variable valve lift mechanism only arrives machinery
Point；Otherwise, it determines described continuous variable valve lift mechanism does not arrives machinery stop；
Or,
Detect described driving motor and have attonity, and judge that whether the voltage of described driving motor is at default model
In enclosing；If described driving motor attonity, and the voltage of described driving motor is in described preset range, really
Fixed described continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines described continuous variable valve liter
Journey mechanism does not arrives machinery stop.
The most according to the method in claim 2 or 3, it is characterised in that continuously may be used described judgement is described
After whether air valve variation lift mechanisms arrives machinery stop, also include:
If it is determined that described continuous variable valve lift mechanism does not arrives machinery stop, determine the first of described valve
Lift direction, controls described driving motor and drives after described valve moves predeterminable range along the second lift direction,
Move along described first lift direction again；Wherein, described first lift direction is for point to from described maximum lift
The direction of described minimum lift or point to the direction of described maximum lift from described minimum lift, described second liter
Cheng Fangxiang is in opposite direction with described first lift；
If described first lift direction is the direction pointing to described minimum lift from described maximum lift, it is judged that institute
State valve and can move to described minimum lift along described first lift direction；Or,
If described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that institute
State valve and can move to described maximum lift along described first lift direction；
If it is determined that described valve can move to described minimum lift along described first lift direction, treat described valve
After moving to described minimum lift, control described driving motor and stop stepping；Or, however, it is determined that described valve can
Described maximum lift is moved to along described first lift direction, after described valve motion to described maximum lift,
Control described driving motor and stop stepping.
Method the most according to claim 4, it is characterised in that can edge at the described valve of described judgement
Described first lift direction moves to described minimum lift, or, can the described valve of described judgement along described
After first lift direction moves to described maximum lift, also include:
If described valve cannot move to described minimum lift along described first lift direction, or, if described gas
Door cannot move to described maximum lift along described first lift direction, starts electromotor described continuously with operating
Variable air valve lift range mechanism；
If described first lift direction is the direction pointing to described minimum lift from described maximum lift, it is judged that institute
State valve and can move to described minimum lift along described first lift direction；Or, if described first lift
Direction is the direction pointing to described maximum lift from described minimum lift, it is judged that can described valve along described the
One lift direction moves to described maximum lift；
If it is determined that described valve can move to described minimum lift along described first lift direction, treat described valve
After moving to described minimum lift, control described driving motor and stop stepping；Or, however, it is determined that described valve can
Described maximum lift is moved to along described first lift direction, after described valve motion to described maximum lift,
Control described driving motor and stop stepping.
6. the control device of a continuous variable valve lift mechanism, it is characterised in that described device includes:
First determines unit, acquiring unit, adjustment unit；
Described first determines unit, is used for determining whether valve reaches the first lift or the second lift；Wherein,
Described first lift is the lift of maximum lift distance the first preset value with described valve, described second lift
For the lift with minimum lift distance second preset value of described valve；
For described first, described acquiring unit, if determining that unit determines that described valve arrives described first lift
Or described second lift, obtain first rotating speed driving motor of described continuous variable valve lift mechanism；
Described adjustment unit, being used for the adjustment of rotational speed of described driving motor is the second rotating speed；Wherein, described
Second rotating speed is less than described first rotating speed.
Device the most according to claim 6, it is characterised in that described device also includes: second determines
Unit, the first judging unit, the first control unit；
Described second determines unit, is used for determining described driving motor whether stall；
Described first control unit, if determining that unit determines that described driving motor has not stalled at for described second,
Control described driving motor stepping；
Described first judging unit, if determining that unit determines described driving motor rotation blockage for described second, sentences
Whether disconnected described continuous variable valve lift mechanism arrives machinery stop；
Described first control unit, if being additionally operable to described first judging unit to determine described continuous variable valve liter
Journey mechanism arrives machinery stop, controls described driving motor and stops stepping.
Device the most according to claim 7, it is characterised in that described first judging unit specifically for:
Judge the electric current of described driving motor whether more than the first pre-set current value, or maintain second preset electricity
Flow valuve reaches preset duration；If the electric current of described driving motor exceedes described first pre-set current value, or maintains
Described second pre-set current value reaches preset duration, determines that described continuous variable valve lift mechanism only arrives machinery
Point；Otherwise, it determines described continuous variable valve lift mechanism does not arrives machinery stop；
Or,
Detect described driving motor and have attonity, and judge that whether the voltage of described driving motor is at default model
In enclosing；If described driving motor attonity, and the voltage of described driving motor is in described preset range, really
Fixed described continuous variable valve lift mechanism arrives machinery stop；Otherwise, it determines described continuous variable valve liter
Journey mechanism does not arrives machinery stop.
9. according to the device described in claim 7 or 8, it is characterised in that described device also includes: the 3rd
Determine unit, the second control unit, the second judging unit；
Described 3rd determines unit, for judging described continuously variable valve lift at described first judging unit
After whether mechanism arrives machinery stop, if described first judging unit determines described continuously variable valve lift
Mechanism does not arrives machinery stop, determines the first lift direction of described valve；Wherein, described first lift side
Maximum lift described in Xiang Weicong is pointed to the direction of described minimum lift or points to described maximum from described minimum lift
The direction of lift；
Described second control unit, is used for controlling described driving motor and drives described valve along the second lift direction
After motion predeterminable range, then move along described first lift direction, described second lift direction and described first
Lift is in opposite direction；
Described second judging unit, if being described from the sensing of described maximum lift for described first lift direction
The direction of minimum lift, it is judged that can described valve move to described minimum lift along described first lift direction；
Or, if described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that
Can described valve move to described maximum lift along described first lift direction；
Described first control unit, is additionally operable to if it is determined that described valve can move to along described first lift direction
Described minimum lift, after described valve motion to described minimum lift, controls described driving motor and stops step
Enter；Or, however, it is determined that described valve can move to described maximum lift along described first lift direction, treats described
After valve motion extremely described maximum lift, control described driving motor and stop stepping.
Device the most according to claim 9, it is characterised in that described device also includes: start single
Unit；
At described second judging unit, described start unit, for judging that can described valve along described first liter
Cheng Fangxiang moves to described minimum lift, or, described second judging unit judges that can described valve along institute
State after the first lift direction moves to described maximum lift, if described second judging unit determines described valve
Cannot move to described minimum lift or described maximum lift along described first lift direction, start electromotor with
Operate described continuous variable valve lift mechanism；
Described second judging unit, is additionally operable to start electromotor at described start unit and continuously may be used so that operating is described
After air valve variation lift mechanisms, if described first lift direction is to point to described minimum liter from described maximum lift
The direction of journey, it is judged that can described valve move to described minimum lift along described first lift direction；Or,
If described first lift direction is the direction pointing to described maximum lift from described minimum lift, it is judged that described gas
Can door move to described maximum lift along described first lift direction.
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| CN201510209236.0A CN106150585B (en) | 2015-04-28 | 2015-04-28 | Control method and device of continuous variable valve lift mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112068465A (en) * | 2020-08-19 | 2020-12-11 | 科博达(重庆)智控技术有限公司 | Deceleration torque reduction control method and system for automobile actuators |
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| CN106150585B (en) | 2019-12-24 |
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