CN102953838B - Damper assemblies and controlling method thereof - Google Patents
Damper assemblies and controlling method thereof Download PDFInfo
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- CN102953838B CN102953838B CN201110249306.7A CN201110249306A CN102953838B CN 102953838 B CN102953838 B CN 102953838B CN 201110249306 A CN201110249306 A CN 201110249306A CN 102953838 B CN102953838 B CN 102953838B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention provides a kind of damper assemblies (100) and controlling method thereof, possess: throttle-valve body (18), motor (14), predeterminated position return mechanism (13), air throttle sensor (16,17) and air throttle control unit (3), this control unit (3) is configured to, when key is opened and is judged to be that predeterminated position return mechanism (13) is abnormal in engine revolution, drive motor (14) and envoy's air valve opening becomes default aperture.According to the present invention, reliability and the Security of damper assemblies (100) further can be improved.
Description
Technical field
The present invention relates to a kind of automobile damper assemblies and controlling method thereof, particularly a kind of damper assemblies and controlling method thereof can carrying out safe handling after the diagnostic result of predeterminated position return mechanism occurs extremely.
Background technique
In the prior art, detected the entering amount of accelerator pedal by accelerator pedal sensor, corresponding to this detection limit setting air throttle target aperture, the electronic type damper assemblies being controlled throttle-valve body by motoring is known.According to this electronic type damper assemblies, control throttle-valve body and carry out the adjustment of engine output, thus improving the runnability of engine.
In addition, in order to ensure the Security of damper assemblies, implement various diagnosis, when diagnostic result is judged to be abnormal, motor power is closed, by predeterminated position return mechanism air throttle aperture maintained in the default aperture of mechanicalness setting in advance, thus remain MIN and keep out of the way traveling, to improve the Security of automobile.Herein, keep out of the way to travel referring to when vehicle breaks down and makes ECU detect abnormal, can danger be avoided and ensure that vehicle has MIN driveability, thus the maintenance station etc. near automobile safety arrival can be made.
Herein, in electronic type damper assemblies, various motion (such as, Japanese Unexamined Patent Publication 11-229943 publication, Japanese Unexamined Patent Publication 11-257103 publication etc.) is existed to the diagnostic techniques of predeterminated position return mechanism.
In technology described in Japanese Unexamined Patent Publication 11-229943 publication (patent documentation 1), under the state that the stopping of (KeyOFF) rear engine closed by key, by motoring throttle-valve body till air throttle aperture becomes diagnosis target aperture, stop motor power afterwards, detect the restoring force air throttle aperture relying on spring (predeterminated position return mechanism) at the appointed time and whether across regulation aperture, thus spring diagnosis can be carried out.
In technology described in Japanese Unexamined Patent Publication 11-257103 publication (patent documentation 2), (KeyOn) is opened afterwards and under the state of engine also in revolution at key, situation in deceleration fuel cutoff during vehicle travels is captured, when air throttle aperture is near default aperture and than default aperture closer to opening side, implement the diagnosis of spring (predeterminated position return mechanism).
But, in patent documentation 1, only can carry out throttle-valve body is back to the spring of default aperture diagnosis from the side more closed than default aperture.But throttle-valve body is back to the spring of default aperture diagnosis from the side of more opening than default aperture can not be carried out.
In patent documentation 2, although describe in deceleration fuel cutoff pattern, carry out the diagnosis of spring from the side of more opening than default aperture.But it is actually and is urged near default aperture by throttle-valve body by motor, and not returns default aperture by the effect of spring.Therefore, can not judge whether spring can proper function well.
And, in the damper assemblies of patent documentation 1,2, after diagnostic result occurs extremely, just enter fault mode, immediately motor power is closed, thus stop the control to throttle-valve body.But because predeterminated position return mechanism breaks down, throttle-valve body can not return to default aperture automatically, thus brings potential safety hazard.
Patent documentation 1: Japanese Unexamined Patent Publication 11-229943 publication
Patent documentation 2: Japanese Unexamined Patent Publication 11-257103 publication
Summary of the invention
The present invention is the result of the concentrated research in view of the problems referred to above, its object is to, and provides a kind of damper assemblies and the controlling method thereof that can carry out safe handling after the diagnostic result of predeterminated position return mechanism occurs extremely.
Therefore, to achieve these goals, damper assemblies of the present invention, possesses: throttle-valve body, and the sectional area of the air suction way of engine is changed, thus regulates the suction air quantity of engine; Motor, drives described throttle-valve body to rotate in described air suction way; Predeterminated position return mechanism, comprise the first spring and the second spring, described first spring is by described throttle-valve body from opening side to corresponding to the predeterminated position deflection presetting aperture, and described throttle-valve body deflects from closedown side to described predeterminated position by described second spring; Air throttle sensor, for detecting air throttle aperture; And air throttle control unit, described air throttle control unit is configured to, and when key is opened and is judged to be described predeterminated position return mechanism exception in engine revolution, drives described motor and makes described air throttle aperture become described default aperture.
In addition, in the damper assemblies of the invention described above, described air throttle control unit is configured to, when key is opened and is judged to be described predeterminated position return mechanism exception in engine revolution, drive described motor and make after described air throttle aperture becomes default aperture, monitor described air throttle aperture, if described throttle-valve body can not keep described default aperture after the described motor power of cut-out, then again drive described motor and make described throttle-valve body maintain described default aperture.
In addition, damper assemblies of the present invention, possesses: throttle-valve body, and the sectional area of the air suction way of engine is changed, thus regulates the suction air quantity of engine; Motor, drives described throttle-valve body to rotate in described air suction way; Predeterminated position return mechanism, comprise the first spring and the second spring, described first spring is by described throttle-valve body from opening side to corresponding to the predeterminated position deflection presetting aperture, and described throttle-valve body deflects from closedown side to described predeterminated position by described second spring; Air throttle sensor, for detecting air throttle aperture; And air throttle control unit, described air throttle control unit is configured to, when being judged to be described predeterminated position return mechanism exception when closing key, upper once open key after again carry out the diagnosis of described predeterminated position return mechanism.
In the damper assemblies of the invention described above, described air throttle control unit is configured to, the diagnostic result of the described predeterminated position return mechanism again carried out after opening key is in normal situation, necessary aperture when driving described motor described throttle-valve body to be maintained starting, implements usually to control to described throttle-valve body after starting.
In addition, in the damper assemblies of the invention described above, described air throttle control unit is configured to, after opening key, the diagnosis of described predeterminated position return mechanism is again for time abnormal, necessary aperture when driving described motor described throttle-valve body to be maintained starting, after starting, envoy's air valve opening becomes default aperture.
In addition, the controlling method of damper assemblies of the present invention, comprising: when key is opened and is judged to be described predeterminated position return mechanism exception in engine revolution, drive described motor and make described air throttle aperture become described default aperture.
In addition, in the controlling method of the damper assemblies of the invention described above, when key is opened and is judged to be described predeterminated position return mechanism exception in engine revolution, drive described motor and make after described air throttle aperture becomes default aperture, monitor described air throttle aperture, if described throttle-valve body can not keep described default aperture after the described motor power of cut-out, then again drive described motor and make described throttle-valve body maintain described default aperture.
In addition, the controlling method of damper assemblies of the present invention, comprising: when being judged to be described predeterminated position return mechanism exception when closing key, upper once open key after again carry out the diagnosis of described predeterminated position return mechanism.
In addition, in the controlling method of the damper assemblies of the invention described above, the diagnostic result of the described predeterminated position return mechanism again carried out after opening key is in normal situation, necessary aperture when driving described motor described throttle-valve body to be maintained starting, implements usually to control to described throttle-valve body after starting.
In addition, in the controlling method of the damper assemblies of the invention described above, after opening key, the diagnosis of described predeterminated position return mechanism is again for time abnormal, and necessary aperture when driving described motor described throttle-valve body to be maintained starting, after starting, envoy's air valve opening becomes default aperture.
By technique scheme, the advantage that has of the present invention and beneficial effect are:
After the diagnostic result of predeterminated position return mechanism occurs extremely, do not cut off motor power and by motor, throttle-valve body driven, further can improve reliability and the Security of damper assemblies.
Accompanying drawing explanation
Fig. 1 is the structural drawing representing damper assemblies 100 of the present invention.
Fig. 2 is the figure of all structures representing the engine controller 1 comprising air throttle control unit 3.
Fig. 3 is the figure closing the action of damper assemblies 100 after (KeyOFF) and the diagnosis of return spring 12 for illustration of key.
Fig. 4 is the action specification figure in deceleration fuel cutoff pattern under various vehicle speed condition.
Fig. 5 is the action specification figure in deceleration fuel cutoff pattern of the present invention under low vehicle speed condition.
Fig. 6 is the action specification figure in high engine speed fuel cut-off pattern of the present invention.
Fig. 7 is the action specification figure in high speed of a motor vehicle fuel cut-off pattern of the present invention.
Action specification figure when Fig. 8 is predeterminated position return mechanism 13 fault.
Motoring action specification figure when Fig. 9 is predeterminated position return mechanism 13 fault.
The action specification figure that motor power when Figure 10 is predeterminated position return mechanism 13 fault cuts off, drive again.
Figure 11 be key close time return spring be diagnosed as the action of NG and key is opened next time time recover normal action specification figure.
Figure 12 be key when closing return spring be diagnosed as the action of NG and key is opened next time time be still diagnosed as the action specification figure of NG.
Figure 13 be key when closing return spring be diagnosed as the action of NG and key is opened next time time be still diagnosed as the action specification figure of NG.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in more detail.
Fig. 1 is the structural drawing representing damper assemblies 100 of the present invention.This damper assemblies 100 possesses: throttle-valve body 18, and the sectional area of the air suction way of engine is changed, thus regulates the suction air quantity of engine; Motor 14, drives throttle-valve body 18 to rotate in air suction way; Acquiescence spring (the first spring) 11, by throttle-valve body 18 from opening side to corresponding to the predeterminated position deflection presetting aperture; Return spring (the second spring) 12, by throttle-valve body 18 from the predeterminated position deflection of closedown side; Air throttle sensor 16,17, for detecting air throttle aperture; And air throttle control unit 3.In addition, motor 24 makes throttle-valve body 18 rotate by transmission device 15.
Fig. 2 represents the figure of all structures of the engine controller 1 comprising air throttle control unit 3.The engine controller 1 comprising this air throttle control unit 3 possesses: input I/F (A/D converter) 9, engine control calculation unit 2 and air throttle control unit 3.A/D converter 9 obtains vehicle speed signal and engine speed signal from Bus-Speed Monitoring portion 22 and engine winding number detection unit 23.
In accelerator pedal portion 6, be configured with accelerator pedal 24 and 2 accelerator pedal sensor 25,26.The intention of driver is represented by the entering amount (accelerator pedal entering amount) of accelerator pedal 24, and this entering amount is as angle of entering into, and by accelerator pedal sensor 25,26 detect.In order to improve the reliability of acceleration operation, accelerator pedal sensor 25,26 structures that can be configured to multiple type.In present embodiment, be the structure of two heavy types as mentioned above.Afterwards, A/D converter 9 reads the accelerator pedal entering amount signal in accelerator pedal portion 6, and reads air throttle Measuring opening signal from air throttle sensor 16,17.
Motor 14, transmission device 15 and predeterminated position return mechanism 13 that air throttle portion 7 comprises throttle-valve body 18, drives this throttle-valve body 18 to rotate, and the air throttle sensor 16,17 being configured with multiple type.In present embodiment, it is the structure of double type.Air throttle portion 7 and air throttle control unit 3 constitute the damper assemblies 100 of present embodiment.
Predeterminated position return mechanism 13 possess for from open side return predeterminated position acquiescence spring 11 and from the return spring 12 closing side and return predeterminated position.
Engine control calculation unit 2 reads accelerator pedal sensor 25, the testing signal of 26, and determines accelerator pedal aperture.Afterwards, according to the aperture desired value corresponding to the throttle-valve body 18 of the amount of described accelerator pedal aperture stored, and set the target aperture (required air throttle aperture) of throttle-valve body 18, and export this required air throttle aperture to air throttle control unit 3.
This air throttle control unit 3 possesses air throttle and controls calculation unit 4 and motor drive circuit portion 5.Air throttle controls calculation unit 4 based on the signal from A/D transducer 9, carries out the drived control of motor 14, and carries out fault diagnosis to described 2 air throttle sensors 16,17.Motor drive circuit portion 5 is such as powered via relay 19 by storage battery B.The testing signal of air throttle sensor 16,17 controls calculation unit 4 by this air throttle and reads, the presence or absence of the exception of diagnosis air throttle sensor 16,17.Have abnormal, judge air throttle sensor 16,17 break down.If talked about normally, based on the signal of air throttle sensor 16,17, determine the actual aperture of air throttle.Based on the requirement aperture of throttle-valve body 18 and the deviation of actual aperture, feedback control (F/B) is carried out to make the mode requiring aperture consistent with actual aperture, calculate the drive volume of the motor 14 that throttle-valve body 18 is rotated, this drive volume is exported to the motor 14 in air throttle portion 7 via motor drive circuit portion 5, thus via motor 14, transmission device 15 makes throttle-valve body 18 carry out opening and closing.
In addition, in present embodiment, diagnose abnormal state by engine control calculation unit 2 or air throttle control unit 3, when indicating motoring to stop, protective function starts action.That is, predeterminated position return mechanism 13 (with reference to Fig. 2) is kept in air throttle portion 7.Time abnormal, throttle-valve body 18 is remained the default aperture of initial setting by this predeterminated position return mechanism 13.This default aperture is set to, and guarantees to keep out of the way to travel and can the engine air intake of scope of safety stop by brake.
But, because predeterminated position return mechanism 13 needs Security when guaranteeing damper assemblies 100 exception, if the reliability of the diagnosis of return spring and the acquiescence spring forming predeterminated position return mechanism therefore can be improved, then further can improve the Security of damper assemblies 100.
An example of the diagnostic method of return spring 12 is as described below.When key closes (KeyOFF), the diagnosis of return spring 12 is implemented.Fig. 3 is the figure closing the action of damper assemblies 100 after (KeyOFF) and the diagnosis of return spring 12 for illustration of key.Driver closes key (KeyOFF), then fuel and igniting stop, thus engine stops.In order to remove the object of negative pressure in sucking pipe etc. when engine stopping, operate with acceleration the side independently temporarily driving throttle-valve body 18 envoy air valve opening court to open and changing.Secondly, in order to learn the full cut-off point voltage of throttle-valve body 18, and control throttle-valve body 18 to full close position, and learn full cut-off point voltage.In the process implementing the study of full cut-off point voltage, the mode that motor 14 maintains full cut-off point with throttle-valve body 18 drives.After the study of full cut-off point voltage terminates, the driving of motor 14 stops, and namely cuts off the power supply of motor 14.After the power-off of motor 14, by the return force of return spring 12, throttle-valve body 18 is opened and becomes set default aperture.Air throttle control unit 3 diagnoses predeterminated position return mechanism 13 whether normally throttle-valve body 18 to be back to default open range, thus terminates whole diagnostic action.
According to the difference of the air displacement of engine, generally with the speed of a motor vehicle of 50km/h ~ 80km/h can keep out of the way travel and by brake can the default air throttle aperture of emergency for about 12deg.In addition, in this situation, preset the normal of aperture and judge that open range is more appropriate as 12deg ± 5deg.
But throttle-valve body 18 is back to set default aperture by return spring 12 and acquiescence spring 11 acting in conjunction by predeterminated position return mechanism 13.Although confirmed closely to make throttle-valve body 18 return default aperture by the return force of return spring 12, if can confirm further give tacit consent to spring 11 return effect, just further can improve reliability.To this, the diagnosis of the predeterminated position return mechanism 13 of present embodiment, not only be there is the action returned from the side closed by return spring 12 when key closes (KeyOFF), also to have when key opens (KeyON) from the side of opening by the action that acquiescence spring 11 returns, thus further improve Security.
But, open (KeyON) at key and in engine revolution, throttle-valve body 18 be set as that more than default aperture has nothing to do with the operation of accelerator pedal 24, that is violate the intention of driver and make the rising of the rotating speed of engine be breakneck.Usually, presetting the setting of aperture is keep out of the way traveling when being assumed to be fault, and namely the imaginary speed of a motor vehicle is the aperture that 50km/h ~ 80km/h sets, and violates the intention of driver in the process of moving and throttle-valve body 18 to be opened to this aperture be irrational after all.
On the other hand, although open in (KeyON) time afterwards and before starter starts engine from key and can diagnose acquiescence spring 11, but due to fail to start before diagnosis terminates, so will take a long time to starting, consider to be accepted from the angle of commodity.
So, open (KeyON) at key and in engine revolution, stop the control to throttle-valve body 18, and throttle-valve body 18 is forced the opportunity being urged to the position of more opening than default aperture, may be thought of as in fuel cut-off pattern.In fuel cut-off pattern, because the burning of engine stops, the words of throttle-valve body 18 action also do not affect.
As mentioned above, the diagnositc decision presetting aperture is that 12deg ± 5deg is more appropriate.Therefore, as the position exceeding more than specified value than default aperture, it is appropriate for selecting this specified value to be about 10deg.
The form of fuel cut-off has varied, such as, there is fuel cut-off when slowing down.It is decontroled accelerator pedal under the state of the speed of a motor vehicle with a certain degree, is gently reduced the situation of the speed of a motor vehicle by engine brake.Fig. 4 represents the figure that this situation is described.After the condition of fuel cut-off is set up, the power-off of motor 14 during implementing fuel cut-off thus diagnosis predeterminated position return mechanism 13.But the object of this diagnosis is to confirm throttle-valve body 18 can be made to return from the position of more opening than default aperture by acquiescence spring 11.
In this situation, driver loosening accelerator pedal, then making to slow down pin leave accelerator pedal 24 after accelerating.Fig. 4 represents the change of engine speed, accelerator pedal aperture, the speed of a motor vehicle and air throttle aperture in this series of actions.Now, first throttle-valve body 18 drives to the side of opening by motor 14, the stage arriving target aperture fine repeatable operation open side and close the driving of side, thus keep certain aperture.Afterwards, in the stage that accelerator pedal 24 loosens, motor 14 drives to closing side, thus reduces air throttle aperture rapidly.
Afterwards, in during fuel cut-off is set up, in the position of more opening than default aperture, close motor 14 power supply, thus implement the diagnosis of acquiescence spring 11.That is, under the state of situation 1 in the drawings, implement the diagnosis of acquiescence spring 11.
But, as previously mentioned, if to preset the setting of aperture be the supposition speed of a motor vehicle is the situation of 70km/h, though then the speed of a motor vehicle be 40km/h state under the condition of fuel cut-off set up, will the state of situation 2 in diagram be become.
Under the state of situation 2, what diagnose is not acquiescence spring, and makes return spring, so in this case, there is no need to implement diagnosis.
In addition, suppose in 100km/h running process, when pin leaves accelerator pedal 24, when the condition of fuel cut-off is set up, the speed of a motor vehicle the chances are 70km/h, it is near default aperture.This becomes the state of situation 3 in diagram, in this situation, even if become default aperture after motor 14 power-off, can not think acquiescence spring 11 diagnostic result OK.That is, it is not be back near default aperture by the effect of acquiescence spring 11, but because the driving force of motor 14 returns.
Therefore, under the state shown in Fig. 4, when air throttle opening ratio preset aperture exceed more than specified value, just can implement close motor 14 and diagnosis acquiescence spring 11.If air throttle control unit 3 detects that actual aperture becomes in the scope of default aperture ± 5deg, then judge that diagnostic result is as normal.
In addition, as shown in Figure 5, when air throttle aperture exceeds more than specified value unlike default aperture, drive throttle-valve body 18 by motor 14 until after air throttle aperture reaches and exceed specified value than default aperture, close the power supply of motor 14 and implement to give tacit consent to the diagnosis of spring 11.
Be explained above in deceleration fuel cutoff pattern the explanation that acquiescence spring 11 is diagnosed.The situation of fuel cut-off has various, and Fig. 6 is the mode of execution diagnosed acquiescence spring 11 under representing high engine speed fuel cut-off pattern.When high engine speed fuel cut-off pattern refers to that the rotating speed of engine rises to more than specified value, the fuel cut-off carried out for the object of protection engine.In this case, because air throttle aperture is in standard-sized sheet or close to standard-sized sheet, after the condition of fuel cut-off is set up, can carry out the diagnosis giving tacit consent to spring 11 at once.After the diagnosis of acquiescence spring 11 terminates, correspond to the mode of accelerator pedal aperture with air throttle aperture and usually control.
Fig. 7 represents mode of execution during high speed of a motor vehicle fuel cut-off pattern.When high speed of a motor vehicle fuel cut-off pattern refers to that the speed of a motor vehicle rises to more than the regulation speed of a motor vehicle, the fuel cut-off carried out for the object of protection vehicle.In this situation, be in standard-sized sheet due to air throttle aperture or close to standard-sized sheet, after the condition of fuel cut-off is set up, the diagnosis giving tacit consent to spring 11 can be carried out at once.After the diagnosis of acquiescence spring 11 terminates, correspond to the mode of accelerator pedal aperture with air throttle aperture and usually control.
Secondly, in mixed power (HEV) car, after driving from engine and switching to electric drive, drive throttle-valve body 18 by motor 14 until after air throttle aperture reaches and exceed specified value than default aperture, close the power supply of motor 14 and implement to give tacit consent to the diagnosis of spring 11.
As switching to power-actuated diagnosis opportunity, if waited as long for, again may switch back engine and driving, thus losing the chance of diagnosis.Therefore, as early as possible, such as, after about 5 seconds, the diagnosis giving tacit consent to spring 11 is carried out.
Above, describe key and open (KeyON) and in engine revolution, and the diagnosis carrying out predeterminated position return mechanism 13 is under steam possible.When diagnositc decision is NG (exception), usually at once motor 14 power-off is stopped the action of air throttle control unit 3.
But as shown in Figure 8, when predeterminated position return mechanism 13 breaks down, even if close motor 14 power supply, air throttle aperture can not be back to default aperture.
Therefore, as shown in Figure 9, key is opened (KeyON) and in engine revolution, when judging predeterminated position return mechanism 13 as exception, and drive motor 14 and envoy's air valve opening becomes default aperture.This state is the fault state of damper assemblies 100, stops controlling completely, so control by the power-off of motor 14 after throttle-valve body 18 becomes default aperture, thus stop the control to throttle-valve body 18 owing to expecting to cut off the electricity supply.
But, as shown in Figure 10, key is opened (KeyON) and engine revolution in, judge that predeterminated position return mechanism 13 is as when abnormal, drive motor 14 and envoy's air valve opening continue to monitor air throttle aperture after becoming default aperture, if under the state finding the supply disconnecton of motor 14, when can not keep default aperture, drive motor 14 again, the mode maintaining default aperture with envoy's air valve opening controls.
Secondly, close the situation being judged to be fault in the spring diagnosis of (KeyOFF) at key, be described with Figure 11.When key closes (KeyOFF), owing to confirming that the restoring force by return spring 12 can not return default aperture, then drive motor 14 and control air throttle aperture and become default aperture.Afterwards, all power comprising ECU is closed.
Key is called self-" shut " mode" after closing (KeyOFF).ECU is in order to implement the process before supply disconnecton, and the power supply of ECU and the power supply of damper assemblies controlled by ECU are in "on" position.After the process of ECU before supply disconnecton terminates, cut off the electricity supply and finishing control by self.
Because the diagnosis that (KeyON) does not implement predeterminated position return mechanism 13 usually opened by next key, the result of its diagnosis is still NG, namely enters failsafe mode thus the power supply of cut-out motor.But driver does not know that the result of determination after last key closedown (KeyOFF) is NG, and during the common starting of default opening ratio, aperture wants large, so the rotating speed of engine start increases greatly, there is the possibility bringing scaring to driver.
Therefore, when key predeterminated position return mechanism 13 diagnositc decision of closing after (KeyOFF) is NG, the diagnosis of return spring 12 is implemented when upper once key opens (KeyON).The result that return spring 12 is diagnosed; be judged to be OK when confirming as normal reply, thus air throttle aperture is controlled the aperture for necessity during starting, after starting, implement control usually; herein, usually control to refer to that the mode corresponding to accelerator pedal aperture with air throttle aperture controls.In addition, can be thought of as a front diagnostic result NG herein may cause diagnostic result wrong due to the error in data of sensor.
On the other hand, when the result that the return spring 12 when key opens (KeyON) is as shown in Figure 12 diagnosed is judged to be NG again, drive motor 14 and envoy's air valve opening controls in default aperture and enters fail safe situation.
In addition, when the diagnostic result of the return spring 12 when key opens (KeyON) is as shown in Figure 13 judged to be NG again, immediately air throttle aperture is not moved to default aperture, but necessary aperture when temporarily drive motor 14 makes throttle-valve body 18 remain on starting, be urged to default aperture more after activation.In this situation, the impact brought to driver can be alleviated.
According to damper assemblies 100 of the present invention, when the diagnostic result of predeterminated position return mechanism is abnormal, continues by motor 14 action controlling throttle-valve body 18, further can improve reliability and the Security of damper assemblies 100.
Although below illustrate invention has been in conjunction with the accompanying drawings and embodiments, be appreciated that above-mentioned explanation does not limit the present invention in any form.Those skilled in the art can be out of shape the present invention when not departing from connotation of the present invention and scope as required and change, and these distortion and change all fall within the scope of the present invention.
Claims (2)
1. a damper assemblies, is characterized in that,
Possess:
Throttle-valve body, makes the sectional area of the air suction way of engine change, thus regulates the suction air quantity of engine;
Motor, drives described throttle-valve body to rotate in described air suction way;
Predeterminated position return mechanism, comprise the first spring and the second spring, described first spring is by described throttle-valve body from opening side to corresponding to the predeterminated position deflection presetting aperture, and described throttle-valve body deflects from closedown side to described predeterminated position by described second spring;
Air throttle sensor, for detecting air throttle aperture; And
Air throttle control unit,
Described air throttle control unit is configured to,
In the fuel cut-off pattern of described engine, when presetting aperture described in described air throttle opening ratio and exceeding more than specified value, stop the energising of described motor, thus carry out the diagnosis of described first spring;
In the fuel cut-off pattern of described engine, when described air throttle aperture exceeds more than described specified value unlike described default aperture, by throttle-valve body described in described motoring until after described air throttle aperture reaches and exceed specified value than described default aperture, stop the energising of described motor, thus carry out the diagnosis of described first spring
And, described air throttle control unit is configured to, when key open and in engine revolution and in fuel cut-off pattern at described engine, described first spring is diagnosed and is judged to be described first spring exception, drive described motor and make after described air throttle aperture becomes default aperture, monitor described air throttle aperture, if described throttle-valve body can not keep described default aperture after the described motor power of cut-out, then again drive described motor and make described throttle-valve body maintain described default aperture.
2. a controlling method for damper assemblies, is characterized in that,
Described damper assemblies possesses:
Throttle-valve body, makes the sectional area of the air suction way of engine change, thus regulates the suction air quantity of engine;
Motor, drives described throttle-valve body to rotate in described air suction way;
Predeterminated position return mechanism, comprise the first spring and the second spring, described first spring is by described throttle-valve body from opening side to corresponding to the predeterminated position deflection presetting aperture, and described throttle-valve body deflects from closedown side to described predeterminated position by described second spring;
Air throttle sensor, for detecting air throttle aperture; And
Air throttle control unit,
Described method comprises: in the fuel cut-off pattern of described engine, when presetting aperture described in described air throttle opening ratio and exceeding more than specified value, stops the energising of described motor, thus carries out the diagnosis of described first spring; In the fuel cut-off pattern of described engine, when described air throttle aperture exceeds more than described specified value unlike described default aperture, by throttle-valve body described in described motoring until after described air throttle aperture reaches and exceed specified value than described default aperture, stop the energising of described motor, thus carry out the diagnosis of described first spring
And, when key open and in engine revolution and in fuel cut-off pattern at described engine, described first spring is diagnosed and is judged to be described first spring exception, drive described motor and make after described air throttle aperture becomes default aperture, monitor described air throttle aperture, if described throttle-valve body can not keep described default aperture after the described motor power of cut-out, then again drive described motor and make described throttle-valve body maintain described default aperture.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520004A (en) * | 2009-04-01 | 2009-09-02 | 四川红光汽车机电有限公司 | Electronic air throttle body for non-contact sensor |
| CN202250409U (en) * | 2011-08-26 | 2012-05-30 | 日立汽车部件（苏州）有限公司 | Air throttle device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03290041A (en) * | 1990-04-06 | 1991-12-19 | Nissan Motor Co Ltd | Throttle valve controller for internal combustion engine |
| JPH11257103A (en) * | 1998-03-13 | 1999-09-21 | Suzuki Motor Corp | Throttle opening diagnostic device |
| JP2004225538A (en) * | 2003-01-20 | 2004-08-12 | Mitsubishi Electric Corp | Throttle valve control device |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520004A (en) * | 2009-04-01 | 2009-09-02 | 四川红光汽车机电有限公司 | Electronic air throttle body for non-contact sensor |
| CN202250409U (en) * | 2011-08-26 | 2012-05-30 | 日立汽车部件（苏州）有限公司 | Air throttle device |
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| Publication number | Publication date |
|---|---|
| CN102953838A (en) | 2013-03-06 |
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