CN101539412B - A method and apparatus of validating an output from a position sensor - Google Patents

A method and apparatus of validating an output from a position sensor Download PDF

Info

Publication number
CN101539412B
CN101539412B CN2009101306193A CN200910130619A CN101539412B CN 101539412 B CN101539412 B CN 101539412B CN 2009101306193 A CN2009101306193 A CN 2009101306193A CN 200910130619 A CN200910130619 A CN 200910130619A CN 101539412 B CN101539412 B CN 101539412B
Authority
CN
China
Prior art keywords
working cylinder
cylinder piston
output
clutch
component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2009101306193A
Other languages
Chinese (zh)
Other versions
CN101539412A (en
Inventor
塞米·佩特里迪斯
伊恩·哈勒伦
安德鲁·安德森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of CN101539412A publication Critical patent/CN101539412A/en
Application granted granted Critical
Publication of CN101539412B publication Critical patent/CN101539412B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18018—Start-stop drive, e.g. in a traffic jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18054—Propelling the vehicle related to particular drive situations at stand still, e.g. engine in idling state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/10—Safety devices
    • F02N11/101—Safety devices for preventing engine starter actuation or engagement
    • F02N11/103—Safety devices for preventing engine starter actuation or engagement according to the vehicle transmission or clutch status
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B60W2510/0208—Clutch engagement state, e.g. engaged or disengaged
    • B60W2510/0225—Clutch actuator position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/02—Clutches
    • B60W2510/0291—Clutch temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0676—Engine temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0685—Engine crank angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/06—Ignition switch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/10—Accelerator pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/14—Clutch pedal position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/18—Sensors; Details or arrangements thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/5023—Determination of the clutch wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • F16D2500/50233—Clutch wear adjustment operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/508—Relating driving conditions
    • F16D2500/50883—Stop-and-go, i.e. repeated stopping and starting, e.g. in traffic jams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/51—Relating safety
    • F16D2500/5108—Failure diagnosis
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

A method and apparatus for validating the operation of a slave cylinder position sensor 63 that is used to measure the position of a slave cylinder piston 62 is disclosed in which the output from a master cylinder piston position sensor 53 is used to predict, e.g. by using look-up tables, the position of the slave cylinder piston 62 and the output from the slave piston sensor 63 is compared to the predicted slave piston position derived from the master cylinder piston sensor 53. If the measured slave piston position falls within predetermined limits applied to the predicted position then the output from slave piston sensor 63 is determined to be reliable and valid otherwise the output is treated as unreliable. Preferably, the prediction of slave piston position is a temperature compensated prediction value. The slave cylinder operates a clutch and the master cylinder is controlled by an electronic controller.

Description

The method and apparatus that is used for the output of affirmation position transducer
Technical field
The present invention relates to the position transducer in the motor vehicles, be specifically related to the apparatus and method for the output of confirming (validate) position transducer.
Background technology
Be equipped with the hand gear vehicle of engine automatic stop/starting control to be commonly referred to micro-hybrid vehicle (Micro-hybrid vehicle), for such vehicle, wish when possibility by utilizing automatic tail-off and restart to maximize fuel economy.The stop-start system of neutral parking (SIN, Stop-in-Neutral) generally is applied in the market at present, but these systems can not maximize fuel economy, the wait because a lot of driver can put into gear in static vehicle.Can not trigger in these cases stopping and parking (SIG, the Stop-in-Gear) strategy of need to putting into gear of neutral parking.
Yet, in order to use parking (SIG) the stop-start strategy of putting into gear, need to guarantee that power train separates the vehicle movement that tries to avert accidents or occur not expecting.Usually pressing clutch pedal and brake pedal and might variator be in that triggering when putting into gear state puts into gear stopping of stopping and starting.Yet, in order to ensure so tactful safety, if receive the restart request that the driver causes by for example releasing brake device pedal, this then can only allow the stop-start logic when power train is separated fully, to rotate and pilot engine, because can prevent that vehicle from rotating during starts shake (jerking) or mobile.If satisfy the condition (be zero and press clutch pedal and brake pedal such as, the speed of a motor vehicle) of tail-off, the Parking condition of then putting into gear should prevent that engine from cutting out to guarantee that engine can restart when power train is not separated fully.
In addition, if the restart that stop-start strategy permission system causes for example when battery need to charge or exist air-conditioning (A/C) request, then only allows to rotate starting when power train is separated.Need so during the rotation start event that system causes, to occur to cause the very unexpected vehicle movement of serious consequence in order to prevent.Therefore, there is the safety-critical demand in the closing with restart of stopping of putting into gear, namely power train must be separated.
Be used for making the position of clutch coupling joint and the working cylinder piston that separates by the use location sensor measurement, can determine when clutch coupling separates.Yet because the complicacy of clutch coupling and clutch actuation system can not be guaranteed clutch separation simply, and because the safety-critical essence of this application must be confirmed the output of position transducer.
Summary of the invention
A target of the present invention provides the apparatus and method for the output of confirming position transducer.
According to a first aspect of the invention, a kind of method of the output for confirming position transducer is provided, the method comprises: use the primary importance sensor that the output of the position of first component is provided, the position of the measurement of use first component draws the position of the prediction of the second component that is connected to first component, use the position of second place sensor measurement second component, the position of the second component that relatively draws from the output of second place sensor and the position of the prediction of second component and the result that will compare are used as the indication of validity of the output of second place sensor.
If the position of the second component that draws from the output of second place sensor is dropped in the predetermined tolerance range of position of prediction of second component, then the output of second place sensor can be confirmed as reliably.
If the position of the second component that draws from the output of second place sensor is dropped on outside the predetermined tolerance range of position of prediction of second component, then can confirm as the output of second place sensor insecure.
The method also comprises measures at least one temperature and based on the adjustment tolerance range of measuring.
The method also comprises measures at least one temperature and based on the position of the prediction of the adjustment second component of measuring.
First component can be the piston of clutch master cylinder, and second component can be the piston of clutch working cylinder, and these two parts are connected together by hydraulic (lift) linkage therebetween.
According to a second aspect of the invention, a kind of clutch system is provided, this system comprises: clutch coupling, hydraulic clutch actuation system and electronic controller, wherein hydraulic clutch actuation system comprises the master cylinder with master cylinder piston, working cylinder with working cylinder piston, master cylinder is connected to the hydraulic (lift) linkage of working cylinder, measure the position of master cylinder piston and the primary importance sensor of the signal of indication measurement value is provided to electronic controller, the position of surveying work cylinder piston also provides the second place sensor of the signal of indication measurement value to electronic controller, wherein electronic controller can operate the position that produces the prediction of working cylinder piston for the position with the measurement of master cylinder piston, and the position of the position of the measurement of the working cylinder that relatively draws from the output of second place sensor and the prediction of working cylinder piston and the result that will compare are used as the indication of validity of the output of second place sensor.
If the position of the working cylinder piston that draws from the output of second place sensor is dropped in the predetermined tolerance range of position of prediction of working cylinder piston, then can to operate for the output of confirming second place sensor be reliable to electronic controller.
If the position of the working cylinder piston that draws from the output of second place sensor is dropped on outside the predetermined tolerance range of position of prediction of working cylinder piston, then can to operate for the output of confirming second place sensor be insecure to electronic controller.
Electronic controller also can operate for definite at least one temperature and based on determined adjustment tolerance range.
Electronic controller also can operate for determining at least one temperature and based on the position of the prediction of determined adjustment working cylinder piston.
Determine that at least one temperature can comprise at least one temperature of measurement or predict at least one temperature by modeling or calculating.
Description is described the present invention by example.
Description of drawings
Fig. 1 is the schematic diagram with micro-hybrid vehicle of stop-start system;
Fig. 2 is the clutch coupling that uses in micro-hybrid vehicle shown in Figure 1 and the schematic diagram of clutch actuation system;
Fig. 3 illustrates the high level flow chart of action of operation of explosive motor that forms the part of vehicle shown in Figure 1 for control;
Fig. 4 is the high level flow chart that illustrates be used to the method for the indication of the engagement state that clutch coupling shown in Figure 2 is provided;
Fig. 5 is the process flow diagram that illustrates for the method according to this invention of the output signal of the clutch working cylinder of a part that confirm to form clutch actuation system shown in Figure 2;
Fig. 6 is the process flow diagram that illustrates for the first embodiment of the method for the current null position of the piston of the clutch working cylinder of a part that determine to form clutch actuation system shown in Figure 2;
Fig. 7 is the process flow diagram that illustrates for the second embodiment of the method for the current null position of the piston of determining clutch working cylinder;
Fig. 8 is the process flow diagram that illustrates for the method for the required threshold value displacement of the separation of determining realization clutch coupling shown in Figure 2.
Fig. 9 is the process flow diagram that illustrates for the method for the engagement state of determining clutch coupling shown in Figure 2;
Figure 10 is the schematic diagram of motion of piston of clutch working cylinder that forms the part of clutch actuation system shown in Figure 2;
Figure 11 is the form that is illustrated in the default that operating period of method shown in Figure 7 obtains; And
Figure 12 is the form that is illustrated in the default that operating period of method shown in Figure 6 obtains.
Embodiment
Specifically with reference to figure 1 and Fig. 2, the motor vehicles 5 with the engine 10 that drives multistage manual transmission 11 are shown.Variator 11 is by clutch system 50 engine 10 that is in transmission connection, and clutch system 50 can be used by the driver of motor vehicles 5 clutch pedal 25 manually to engage or discharge.
Variator 11 has the gear selector (not shown) that can move between some positions, these positions comprise the part that at least one has selected to form multiple-speed gear-box gear the position and do not select the neutral gear position of the gear of multiple-speed gear-box.When gear selector moved to neutral gear position, multiple-speed gear-box 11 was called and is in neutral position state, and its medium power can not be by the multiple-speed gear-box transmission; And move to when putting into gear the position at gear selector, multiple-speed gear-box 11 is called the state of putting into gear that is in, and its medium power can be by the multiple-speed gear-box transmission.
Form is the engine starter of integrated starter-generator 13 engine 10 that is in transmission connection, and is the bent axle that the flexible gear 14 of driving belt or chain-drive mechanism is connected to engine 10 by form in this case.Starter-generator 13 is connected to the power supply that form is battery 15 and is used for piloting engine 10.When starter-generator was worked as generator, this battery was by starter-generator charging.Should be understood that starter-generator 13 can be replaced by 10 the starter motor of being used for piloting engine.
Drive the bent axle of engines 10 at the during starts starter-generator 13 of engine 10, and other the time starter-generator drive to produce electric energy by engine 10.
Form is the overall operation that can be used for by the switchgear (on-offdevice) of driver's operation control engine 10 of available key operated ignition switch 17.Namely, ignition switch 17 is in " connections " position (ignition switch is connected (key-on)) and when ignition switch 17 was in "off" position (ignition switch disconnection (key-off)), engine 10 can not move when engine 10 operation.Ignition switch 17 also comprises the 3rd instantaneous position for manual starting engine 10.Should be understood that and to use other devices that this function is provided and the invention is not restricted to use available key operated ignition switch.
Electronic controller 16 is connected to starter-generator 13, engine 10, be used for monitoring that variator 11 is in the gear selector sensor 12 that neutral is still put into gear, the road speeds sensor 21 that is used for the rotating speed of measurement wheel 20, the brake pedal position sensor 24 that is used for the position of supervision brake pedal 23, the clutch master cylinder position transducer 53 that is used for monitoring the position of master cylinder piston 52 and indirectly monitors the position of the clutch pedal 25 that is mechanically connected to master cylinder piston, the clutch working cylinder position transducer 63 that is used for the position of follow-up work cylinder piston 62 is also connected to the throttle position sensor 19 for the position that monitors accelerator pedal 18.
The position of master cylinder piston 52 and working cylinder piston 62 can use any method in the multiple location sensing method as example and unrestriced PLCD (the linear contactless displacement of permanent magnetism) method and Hall effect method are measured by sensor 53,63.
Driver's input that accelerator pedal 18 provides required engine 10 power to export.If accelerator pedal 18 has moved from rest position, then can be described as accelerator pedal and be in depressed position or be in pressured state.
Should understand, the sensor of the position of the gear selector that term " gear selector sensor " is not limited to monitor, but can put into gear or any device of the feedback of neutral for providing variator 11 to be in, and shift sensor is not that the SIG stop-start system is necessary.
Whether similarly, term " brake pedal sensor " is not limited to monitor the sensor of the position of brake pedal, but can exert pressure with any device of the feedback of retro maneuver vehicle 5 to brake pedal 23 for driver that motor vehicles 5 are provided.For example, the brake pedal sensor can monitor the pressure of the fluid in one or more brake pipes.Fully pressing down brake pedal 23 with when braking, brake pedal is called and is in pressured state or is in depressed position.
Now specifically with reference to figure 2, can see that clutch system 50 comprises clutch coupling 2 and clutch coupling 2 is connected to the fluid power system of clutch pedal 25.Fluid power system comprises the mechanical linkage that clutch pedal 25 is connected to the master cylinder piston 52 of master cylinder 51, the output of master cylinder 51 is connected to hydraulic connecting or the fluid pressure line 55 of an end of the working cylinder 61 that wherein is slidingly fitted with working cylinder piston 62, and the mechanical linkage 65 from working cylinder piston 62 to the release bearing 6 that is used for optionally separation and engaging clutch 2.
Should be understood that the displacement on arrow " clutch-pedal travel " direction of clutch pedal in Fig. 2 will produce respectively master cylinder piston 52 corresponding displacement D on the clutch separation direction Master cylinder pistonWith working cylinder piston 62 corresponding displacement D Working cylinder piston
Clutch coupling 2 is to push away to put type (push release type) power clutch and comprise cover cap and main assemblage of spring 3, platen 4 in this case, and between platen 4 be connected to clutch plate 7 between the flywheel 8 of bent axle (not shown) of engine 10.Clutch coupling 2 has conventional structure and not at this detailed description, only need to know this stage under working cylinder piston 62 effects release bearing 6 at arrow D Clutch couplingMotion on the direction is the motion on the clutch separation direction, and opposite motion is the motion on the clutch coupling direction of engagement.On certain point in the range of movement of release bearing 6, the state of clutch coupling 2 will be changed into the engagement state that wherein can transmit a large amount of moments of torsion from the released state that clutch coupling does not wherein transmit torque to variator 11 from engine 10 basically.This position that clutch coupling engages is commonly referred to the biting point.The value of moment of torsion depends on that several factors is different between vehicle and vehicle, these factors comprise the mechanical ratio between engine 10 and the driving wheel (not shown), friction force in the power train, friction force between wheel and the road surface, but in general when using, will produce shake and the common moment of torsion in 3 to 10Nm scopes that can be noticed by the occupant of motor vehicles.
Electronic controller 16 receives some signals from engine 10, comprises the signal from the rotating speed of the indication engine 10 of speed probe (not shown), and transmits a signal to engine to be used for closing and starting of control engine 10.In this case, engine 10 is spark ignition engines 10 and is used for the fuel feed system (not shown) of control engine 10 and the firing system (not shown) of engine 10 from the signal that electronic control unit 16 sends.If engine 10 is diesel motors, the fuel that then only controls to engine is supplied with.Electronic controller 16 can comprise various parts, comprise central processing unit, memory storage, timer, and will be converted to from the signal of the sensor that is connected to electronic controller 16 the operation signal processing apparatus of the data that automatically stop and starting of control engine 10 specifically that is used for control engine 10 by electronic controller 16.Should also be understood that electronic controller 16 can be by communicating with one another to realize that some electronic control units that separate of required function form.
At the normal engine run duration, electronic controller 16 can operate the fuel supplied with to engine 10 for control and point of adjustment ignition system in order to provide spark to produce the engine torque of expectation by spark plug to engine 10 in correct timing.
The operation of electronic controller 16 control engines 10, and engine 10 can operate in two kinds of patterns: first mode or stop-start operational mode and the second pattern or manual mode of operation.
Being used for determining engine 10 with the operation of the second pattern or with the principal element that first mode operates is whether motor vehicles 5 are in motion.If motor vehicles 5 are in motion, then engine operates with the second pattern, and engine 10 will move continuously, if and motor vehicles 5 are not in motion, then engine 10 wherein shows that may carry out stop-start operates the automatic stop-start operation of then carrying out engine as long as other factors are as mentioned below with the first mode operation.
In first mode or stop-start pattern, when one or more predetermined engine stops and starting conditions satisfied, engine 10 was not having the driver optionally to be stopped and being started by electronic controller 16 under intervening.These stop with starting conditions based on the signal that is received from throttle sensor 19, brake sensor 24, clutch system 50 and gear selector sensor 12 by electronic controller 16.The position of clutch coupling 2, accelerator pedal 18, brake pedal 23 and variator 11 or state all are different motor vehicles variablees, may be used to the operation of control engine 10.Should be understood that and also can use a lot of its dependent variables, include but not limited to the pump operated state of PAS, the output of detent vacuum transducer, the manual disable switch of stop-start.
When engine 10 operated with the second pattern, reforwarding row and the manual operation by ignition switch 17 stopped and piloting engine 10 as long as ignition switch 17 remains on " connection " position engine.
Although the measured value that makes to describe motor vehicle speed of reference wheel sensor 21 above, because such sensor is configured on the motor vehicles as the part of anti-blocking brake system usually, but should understand, other devices that are fit to also can be used for determining the speed of motor vehicles 5, such as the sensor of the rotating speed of the output shaft of measuring variator 11.
Refer now to Fig. 3, illustrate be used to determine whether may be with the high level flow chart of the method for stop-start pattern or first mode operation.
The method starts from step 30, and ignition switch 17 is in open position and remains on this state until step 31 ignition switch 17 moves on position, and this will pilot engine 10 in step 32.
Then in step 33, determine whether to satisfy the condition of stop-start.In these conditions one can be whether vehicle 5 is higher than predetermined speed motion and for the present invention, also comprises the engagement state of clutch coupling 2.
Ignore the every other condition that satisfies of may needing, if the state of clutch coupling 2 is defined as " separation ", condition and the method for then satisfying the operation of SIG stop-start proceed to step 35, wherein select the first operator scheme; If but the state of clutch coupling 2 is defined as " joint ", condition and the method for then not satisfying the stop-start operation proceed to step 34, wherein select the second operator scheme or normal manipulation mode.
After step 34 and 35, the method proceeds to step 36 to determine whether ignition switch 17 still is on position.If ignition switch is still connected, if then the method is returned step 33 but ignition switch is defined as being in open position, then the method finishes in step 37.
Refer now to Fig. 4, the high level flow chart of method of the routine of a plurality of links that comprise that the engagement state of determining clutch coupling 2 is required is shown.
The method starts from step 31, and at this moment ignition switch 17 moves on position, then in step 100, determines whether the output of working cylinder position transducer 63 is reliable.
If determine that working cylinder position transducer 63 is unreliable, then the method proceeds to step 150, and wherein mark is set to zero.Should be understood that in practice, this mark can be set to zero in order to consistent starting state is provided when ignition switch is connected.Then the method proceeds to step 500, wherein the state of mark is selected the first operator scheme as needs or the indication of the second operator scheme sends the stop-start control system to.In the example shown, be that zero mark setting always makes stop-start system select the second operator scheme.Then the method proceeds to step 600, wherein determine ignition switch 17 whether still be on position and if it is the method return step 100, otherwise the method finishes 1000.
Yet if determine that in step 100 working cylinder position transducer 63 is reliable, the method proceeds to step 200 from step 100, wherein determines the current null position of working cylinder piston 62.
Then the method proceeds to step 300, wherein determines to guarantee to separate the required displacement threshold value (X that starts at from the working cylinder piston null position Threshold value).
Then in step 400, determine whether the displacement of the measurement of working cylinder piston 62 exceeds displacement threshold value X Threshold value, and if it is mark is set to 1, otherwise mark is set to 0.
Then the method proceeds to step 500, wherein the state of mark is selected the first operator scheme as needs or the indication of the second operator scheme sends the stop-start control system to.In the example shown, be that 0 mark setting always makes stop-start system select the second operator scheme, be 1 mark setting always makes stop-start system select the first operator scheme.Then the method proceeds to step 600, determine wherein whether ignition switch 17 still is on position, and if it is the method is returned step 100, otherwise the method finishes 1000.
Should understand, opposite annotated logic can be used or certain other forms of designator can be used, for example the method can depend on by still not passing through the check at 400 places, redirect (GO TO) is to step 34 or the step 35 of method shown in Fig. 3, and step 150 can be the output of " jumping to step 34 ".
Now specifically with reference to figure 5, be shown specifically the method according to this invention shown in the step 100 of Fig. 4.
In a word, use master cylinder position transducer 53 and working cylinder position transducer 63 to measure the position of the piston 62 of the piston 52 of master cylinder 51 in the hydraulic clutch release systems and working cylinder 61, and send the output signal of these sensors to electronic controller 16.Electronic controller 16 can operate for comparing the master cylinder piston position of being measured by master cylinder position transducer 53 and the working cylinder piston position of being measured by working cylinder position transducer 63 so that affirmation or the confirmation to the position of working cylinder piston 62 to be provided.
Be in desired location if working cylinder piston 62 is confirmed as, the output signal of then supposing working cylinder position transducer 63 is the reliable indication of working cylinder piston position.
Should understand, when initial setting up vehicle 5, by master cylinder piston 52 and working cylinder piston 62 being moved to its corresponding cylinder 51,61 ends two position transducers 53,63 output are calibrated to the actual zero point position, described end is that piston displacement begins the place when pressing down clutch pedal 25, or uses sensor setting to be configured to realize these reference values.
Get back to Fig. 5, in step 105, use master cylinder position transducer 53 to measure the position of master cylinder piston 52, then determine system temperature in step 115.System temperature can obtain by the one or more temperature sensors that are arranged in each position of clutch actuation system; can be by one in master cylinder position transducer 53 and the working cylinder position transducer 63 or both acquisitions; prerequisite is that temperature signal can from obtaining with these sensors 53,63 related temperature-compensation circuits, maybe can or calculate acquisition by modeling.
Then in step 120, electronic controller 16 is determined the working cylinder piston position of prediction by the signal that receives from master cylinder position transducer 53.
Can carry out this prediction with two kinds of methods.
In the first option, use the master cylinder piston position as the polynomial expression that forms splines, discrete filter function or discrete transfer function or the input of polynomial expression group, and use the output of polynomial expression, splines, filter function or transport function as estimation or the prediction of working cylinder piston position.
In the second option, use the master cylinder piston position as the input of two look-up tables.In these look-up tables first produces the value that is used for corresponding greatest hope working cylinder piston position, and second generation in these look-up tables is used for the value of corresponding minimum expectation working cylinder piston position.
Then in step 125, according to the prediction of temperature correction working cylinder piston position.This is desired, because have various factors to affect the relation between the position of the position of master cylinder piston 52 and working cylinder piston 62 but be temperature the most significantly in these factors, temperature can cause being connected the expansion/contraction of the pipeline that is used for connection master cylinder 51 and working cylinder 61 for transmit motion and power from master cylinder 51 with contraction to the expansion of the hydraulic fluid of working cylinder 61.The expansion of these pipelines is so that need to fill extra fluid in pipeline, this is called " Volume Loss effect " and is to cause the most remarkable reason of distinguishing between master cylinder piston position and the working cylinder piston position.
Because the temperature range that experiences between the operating period for generation of the transport function of the prediction of the position of working cylinder piston 62 or possible noise factor that relation must comprise all scopes and vehicle 5 may be wider, to temperature range completely enough the wide tolerance range of healthy and strong needs application when working cylinder position transducer 63 in fact works, check unsuccessfully preventing.The danger of using wide tolerance range is to can't detect and the incoherent problem of temperature, because such problem is too little with respect to considering the required tolerance range of temperature variation.
Therefore, by comprising that temperature sensor or temperature model are to provide temperature information to control algolithm, can effectively eliminate temperature factor, thereby allow to use less tolerance range considering other noise factor, thereby the increase system is to the susceptibility of the real mistake of the operation of working cylinder position transducer 63.
Should understand, in practice, can combination step 120 and 125, namely be used for the transport function of position of prediction work cylinder piston 62 or relation and can comprise temperature compensation but illustrate discretely in the drawings, although because do not expect also may eliminate step 115 and 125 and use large tolerance to bring and consider temperature variation.
Now get back to Fig. 5, in step 130, compare the position (P of the prediction of working cylinder piston 62 Prediction) with step 110 in the position of the measurement that draws from working cylinder position transducer 63, and in step 135, determine the position (P that measures Survey Amount) whether in the predetermined tolerance upper limit and lower variation of tolerance.
For example, if the position of prediction is 15mm and tolerance limit is ± 0.05mm, then step 130 place relatively can be following form:
P The lower limit of prediction＜P Measure＜P The upper limit of prediction
Or use prediction and the limit provide previously:
14.95＜P Measure＜15.05?
If the answer to this check is yes, then the method proceeds to step 140, is no if answer, and then the method proceeds to step 145.
Should be understood that in practice, this relatively can be the comparison of numerical data or voltage level and not be the comparison of physical size.
If the method proceeds to step 140, show that then working cylinder position transducer 63 confirmed and can use, so then the method can turn back to the step 200 of main method.On the contrary, if the method proceeds to step 145, although then show the failure and not shown of affirmation process, error flag can be set.Then the method returns the step 150 of main method, and the indication engine must be second or normal manipulation mode operation, because the output of working cylinder position transducer 63 is insincere.
Can be after ignition switch be connected or only when one group of entry condition satisfies, with continuously or the mode that repeats carry out comparison in step 130 and the description of 135 places.
An example of entry condition is to work as master cylinder piston 52 within the specified portions of its scope, in the time of for example near the end block piece (end-stop) that engages or separate.
Other examples of entry condition comprise when speed that the speed when master cylinder piston 52 is lower than assign thresholds or working cylinder piston 62 is lower than assign thresholds.
When clutch coupling 2 moves between full engagement position and complete separation point position, piston 62 short-distance movements of working cylinder 61, this is usually in the zone of 8mm.Yet working cylinder 61 has much bigger possible moving range, usually in the zone of 24mm, and at the whole life period of clutch coupling when clutch coupling 2 wearing and tearing or when changing, the moving range of less 8mm can this in a big way in movement (seeing Figure 10).
The effect of clutch abrasion is rest position or the null position of mobile working cylinder piston 62 when clutch coupling 2 engages shown in Figure 10 left side fully, and if avoid measuring error, then needs to compensate this null position and move.
If the output of using working cylinder position transducer 63 is with the indication of engagement state that clutch coupling 2 is provided effectively, then need to have a kind of method to determine the minimum position of the rest position of working cylinder piston 62, thereby eliminate the effect that on a large scale, moves so among a small circle.Thereby Fig. 6 illustrates be used to providing this minimum null position to eliminate or compensate the first embodiment 200a of the method 200 of clutch abrasion effect.
Method 200a starts from the step 31 carried out when ignition switch 17 moves on position, the first element that the method is carried out is that current zero migration value Z is set to equal maximum zero migration value M.
Maximum zero migration value is set to the value (this value is 24mm as shown in figure 10 in this case) more than or equal to the absolute working cylinder piston position of measuring at the farthest possibility transfer point place of working cylinder piston 62 on detaching direction.Its effect has engaged regardless of its virtual condition for the indication of ignition switch connection place before operated clutch 2 clutch coupling 2.This is preferred safety condition for stop-start system, because this can prevent unsafe engine start.
Working cylinder position transducer 63 is the position of follow-up work cylinder piston 62 continuously, and the minimum zero migration value Z of storage working cylinder piston 62.
Although it will be understood by those skilled in the art that and can determine full engagement position in step 210, the position of surveying work cylinder piston 62 then, in practice, measure continuously the position of piston 62 and with the least displacement position of piston 62 as bonding station.
Then in step 215, compare the new measured value Z of zero migration NewlyWith the current value that is stored in the zero migration in the electronic controller 16.
If the new value Z of zero migration NewlyValue Z than current storage zero migration is little, and then the method proceeds to step 220, otherwise the method proceeds to step 225.
In step 220, the value Z of zero migration is set to equal the new value Z of off-set value at zero point NewlyAnd the method proceeds to step 230, and in step 225, and then the value of zero migration remains unchanged and therefore Z is set to equal Z existing value and the method proceed to step 230.
In step 230, determine whether ignition switch 17 still is on position, and if it is the method is got back to step 210, if the method finishes in step 240 but ignition switch 17 has now disconnected.
The method guarantees when clutch coupling 2 wearing and tearing, regulates zero migration value Z and engages fully and the position of clutch pedal 25 when not having displacement at clutch coupling 2 to keep the true zero point value to equal working cylinder piston 62.If do not use the output of the party's rule working cylinder position transducer 63 when clutch coupling 2 wearing and tearing, to have the error of increase and may indicate the not mobile in fact mobile distance of working cylinder piston 62.This is a problem when the output of working cylinder position transducer 63 is used for controlling other vehicle characteristics such as stop-start based on the clutch coupling engagement state, because must determine that the position of working cylinder piston 62 is in order to accurately determine reliably the engagement state of clutch coupling 2 with pinpoint accuracy (less than 0.1mm).
Should be understood that as long as ignition switch 17 remains on position, just can repeatedly circulate and carry out circulation 210,215,220,230,210 or 210,215,225,230,210.
Refer now to Fig. 7, be used for to determine second embodiment of method 200 of the zero migration value of working cylinder piston 62, wherein with regard to step 31 to 230 speeches with mentioned above identical, so repeat no more for these steps.
Have the automatic wear compensation function at release bearing 6 or clutch coupling 2 and use this second embodiment method 200b when offsetting the effect of clutch abrasion.When being in the process of joint, clutch coupling 2 repeatedly operating such device with the effect of compensation clutch driven plate 7 wearing and tearing after the clutch operating, therefore this effect moves away from full engagement position with zero migration position Z as shown in figure 10 and reaches predetermined amount, such as 0.1mm.
Get back to Fig. 7 from step 230, if ignition switch 17 disconnects, then the method finishes in step 240, if but ignition switch 17 still connects, then the method proceeds to step 250, wherein definite since the last time cycle for the treatment of operated clutch 2 whether.
If clutch coupling does not operate, namely keep engaging or separating fully, then the method proceeds to step 210, if but have clutch operating, namely separate and joint subsequently, then the method proceeds to step 260, wherein will less value S be added to the zero migration value Z of current storage.Then the method proceeds to step 210.
The effect of disturbance or increment S can illustrate best with reference to Figure 11 and Figure 12.
At first with reference to Figure 11, use default M=25mm, Z Newly=8.0mm and S=0.2mm illustrate the sheet format output of each step of method 200b.Should be understood that and not realize the method with physical size, can realize the method with numerical data or the value as voltage, but for illustration purpose, use actual measured value.
For the first half of form, increment S is offset by step 215 ratchet decrement algorithm (ratchet down algorithm) of expression in 230 as shown to the effect of the value Z of zero migration.Being Z remains on 8.0 to the iteration of this scope, and this is not enough to occur any wearing and tearing and the automatic wear compensation mechanism related with release bearing 6 or clutch coupling 2 do not carry out self-regulation to it.Should be understood that when having clutch abrasion value Z NewlyCan reduce, and can be yes in step 215 result therefore, and Z NewlyCan be set to new Z value, for example, if the new full engagement position that measures working cylinder piston 62 in step 210 is the currency of 7.95mm and Z be 8.0mm 215 upcheck and Z will be set to 7.95mm.
The situation that the latter half of form is illustrated in the automatic wear compensation mechanism related with release bearing 6 or clutch coupling 2 when carrying out self-regulation.In this case, carry out the adjusting of 0.1mm.Its effect is upchecking of step 215 place, because then 8.1mm is updated to 8.1mm in step 220 with the zero migration value less than 8.2mm.Therefore the effect of wear adjustment is compensated by method 200b shown in Figure 7 automatically.
Refer now to Figure 12, the situation for clutch coupling 2 or release bearing 6 with wear-compensating with method 200a shown in Figure 6 is shown.
But the first half of this form is different from the latter half of identical this form shown in Figure 11, because the method is not used incremental step S.
Therefore, after clutch coupling 2 or release bearing 6 had carried out the automatic adjusting of 0.1mm as mentioned above, the method was with the Z of 8.1mm NewlyValue enters step 215 and because Z value increment value S and remain on 8.0mm not, the check at 215 places failure and therefore zero migration Z remain on 8.0mm, and carried out how many times and automatically regulated all so, can only reduce or keep present worth by algorithm because zero migration Z can't increase.Its effect be each error that all produces increase when automatically adjusting by clutch coupling 2 or release bearing 6 and working cylinder position transducer 63 will indicate mistakenly working cylinder piston 62 than its actual present position more near the separation point position, and so risk of the engagement state of clutch coupling 2 being defined as separating when existing clutch coupling in fact to keep engaging.Should be understood that this mistake can only correction when next ignition switch is connected the circulation beginning.
In a word, the ratchet algorithm is by following work: if it is farther to detect absolute working cylinder piston position off-set value than current maintenance on direction of engagement, then the ratchet algorithm is replaced the zero migration value of current maintenance with the new value of measuring.Therefore, the highest position of degree of engagement that always in this ignition key cycled, detects of the value of current maintenance.
The zero migration value that is kept by the ratchet algorithm can be as " zero migration " with by deducting the relative position of zero migration Z evaluation work cylinder piston 62, as hereinafter describing in detail from absolute working cylinder piston position.
In some cases, preferably prevent the execution of ratchet algorithm.For example, under the high-engine rotating speed, the working cylinder piston position that the distortion of clutch components such as diaphragm spring causes can provide the mistake indication to working cylinder piston 62 full engagement position.In these situations or other situations, can avoid mistake by " freezing " ratchet algorithm.When freezing, ratchet mechanism can not be upgraded the value of its current maintenance and therefore for example use the value that provides above, if measure wrong value Z Newly=7.5mm can be not influential yet, because zero migration Z will be frozen in 8.0mm.
As mentioned above, each clutch coupling 2 separates when then engaging, and zero migration Z is with regard to disturbance or increase progressively to hold any movement of the working cylinder piston that automatic adjusting mechanism or self-regulating mechanism by clutch coupling 2 cause.Use disturbance by increasing little amount S, increment S is having to zero migration Z in the scope of 0.1mm to 0.2mm usually, and its effect is with respect to zero point of the relative Repeat of absolute range mobile working cylinder piston 62 on detaching direction.Each clutch coupling 2 separates and triggers disturbance when then next engaging, but automatic adjusting mechanism does not separate a lot of kilometers of regulating when then engaging and travelled between vehicle is being regulated usually at each clutch coupling 2.Yet the disturbance of making when not automatically adjusting is eliminated rapidly by the ratchet algorithm.Disturbance or the amplitude that increases progressively must be chosen as is a bit larger tham the adjusting made by automatic adjusting mechanism and regulates to hold in the single disturbance repeatedly.
For the cost-effective and reliable method of the engagement state that is provided for determining clutch coupling 2, the inventor recognizes that the value that provides indication clutch coupling 2 to engage or separate can be provided from the displacement of its full engagement position working cylinder piston 62.Term engages or is separated in and refers in this context whether clutch coupling 2 transmits the moment of torsion of scheduled volume.
Scheme described herein determines based on the output of working cylinder position transducer 63 whether clutch coupling 2 is in released state, the linear position of this sensor measurement working cylinder piston 62.The method that herein proposes is used in the position of the working cylinder piston 62 that senses moving along its stroke that indication clutch coupling 2 separates when exceeding threshold value.Must calibrate this threshold value so as to consider clutch actuation system 50 and clutch coupling 2 in all tolerances, these tolerances comprise: variation between the part during manufacturing, assembling variation, wearing and tearing, environmental baseline such as temperature and sensor accuracy.Thereby this guarantees and can separate the needs that threshold value is exempted study clutch separation/abutment to each vehicle production line calibration single clutch.
In these variablees, be temperature the most significantly, because the variation of temperature not only can affect the physical size of parts, also can affect the frictional property of clutch coupling 2.Therefore thereby a kind of method shown in Figure 8 is used for the precision that error that compensation temperature causes improves the displacement threshold value of calculation expectation.
Method 300 starts from step 31, and this step is that ignition switch is connected event, and next step is the temperature in one or more ignition key position gaging clutch drive systems 50.This output that can maybe can pass through by using a plurality of special temperature sensors to carry out the temperature-compensation circuit of use working cylinder position transducer 63 realizes.Regardless of the method for using, all in step 320, use this temperature value to determine displacement threshold value X Threshold valueThe value of temperature compensation to determine the engagement state of clutch coupling 2.
The method of using in step 320 is diversified, but can comprise that the model that uses clutch actuation system is to determine guaranteeing that clutch coupling 2 separates the displacement of required working cylinder piston 62; The experimental data that use is stored in one or more look-up tables is separated the displacement of required working cylinder piston 62 to determine to guarantee clutch coupling 2; And come the temperature of estimating clutch 2 and/or clutch actuation system based on environment temperature and the combination that is included in other sensor signals in the electronic controller 16 or information such as engine torque, engine speed, the speed of a motor vehicle etc.
Should be understood that step 320 comprises at least one algorithm that the position that makes working cylinder piston 62 is relevant with the engagement state of clutch coupling 2 and revises these one or more algorithms to consider the temperature input of measuring in step 310.
Then in step 330, with the displacement threshold value X of temperature compensation Threshold valueValue be stored in the electronic controller 16 to use in the future.Then method 300 finishes in step 340.
Refer now to Fig. 4 and Fig. 9, disclose the method 400 that is used for the engagement state of definite clutch coupling 2.
Method 400 starts from step 31, and this step is that ignition switch is connected event, then uses working cylinder position transducer 63 surveying work cylinder pistons 62 from the displacement (X of the measurement of its actual zero point position in step 410 Measure).
Then in step 420, by from the shift value of measuring, deducting use above with reference to a zero migration Z who draws among figure 6 and the described method 200a of Fig. 7 and the 200b, the actual displacement of evaluation work cylinder piston 62.
Be X Actual=X Measure-Z
Wherein:
X ActualThe actual displacement of=working cylinder piston;
X Measure=the displacement of being measured by the working cylinder position transducer; And
Z=zero migration.
Then the method proceeds to step 430, wherein compares the actual displacement X of working cylinder piston 62 ActualWith the displacement threshold value of determining by the said method 300 shown in Fig. 8.
That is, service test: X Actual＞X Threshold valueDetermine that clutch coupling 2 engages or separation.
Should be understood that in order to consider lag-effect two threshold values can be arranged, a threshold value is used for a direction of sensor signal.That is, if signal is increasing then is using a threshold value, if sensor signal is reducing then uses Second Threshold.
If by this check, then the method proceeds to step 450 mark and is set to one (1) with 2 separation of indication clutch coupling, if but the check at step 430 place is failed, and then be set to zero (0) at step 460 mark and be defined as engaging with the indication clutch coupling.
Figure 10 illustrates X ActualGreater than X Threshold value, i.e. therefore the actual displacement of working cylinder piston 62 situation and the method during greater than the threshold value displacement determine that clutch coupling 2 separates.
After step 450 and 460, method proceeds to step 470 and control turns back to the main operation routine in step 500 shown in Figure 4.
Said method is that illustrated examples and step wherein can depend in due course order execution of application, carry out synchronously, carry out simultaneously, or carries out with different orders.
It will be understood by those skilled in the art that, although described the present invention by example with reference to one or more embodiment, the invention is not restricted to the disclosed embodiments and can construct one or more modifications of the disclosed embodiments or alternate embodiment are not departed from the scope of the present invention of setting forth in claims of the application.

Claims (10)

1. method of be used for confirming the output of position transducer, described method comprises: use the primary importance sensor that the output of the position of first component is provided, the position of the measurement of use first component draws the position of the prediction of the second component that is connected to first component, use the position of second place sensor measurement second component, the position of the position of the second component that relatively draws from the output of second place sensor and the prediction of second component and the result that will compare are used as the indication of validity of the output of second place sensor, wherein said first component is the piston of clutch master cylinder, described second component is the piston of clutch working cylinder, and described first component and second component are connected together by therebetween hydraulic (lift) linkage.
2. the method for claim 1 is characterized in that, if the position of the second component that draws from the output of second place sensor is dropped in the predetermined tolerance range of position of prediction of second component, then the output of second place sensor is confirmed as reliably.
3. method as claimed in claim 1 or 2, it is characterized in that, if the position of the second component that draws from the output of second place sensor is dropped on outside the predetermined tolerance range of position of prediction of second component, then confirm as the output of second place sensor insecure.
4. method as claimed in claim 2 or claim 3 is characterized in that, described method also comprises measures at least one temperature and based on the adjustment tolerance range of measuring.
5. such as each the described method in the claim 1 to 4, it is characterized in that, described method also comprises measures at least one temperature and based on the position of the prediction of the adjustment second component of measuring.
6. clutch system, described clutch system comprises: clutch coupling, hydraulic clutch actuation system and electronic controller, wherein said hydraulic clutch actuation system comprises the master cylinder with master cylinder piston, working cylinder with working cylinder piston, master cylinder is connected to the hydraulic (lift) linkage of working cylinder, measure the position of master cylinder piston and the primary importance sensor of the signal of indication measurement value is provided to electronic controller, the position of surveying work cylinder piston also provides the second place sensor of the signal of indication measurement value to electronic controller, wherein said electronic controller can operate the position that produces the prediction of working cylinder piston for the position with the measurement of master cylinder piston, and the position of the position of the measurement of the working cylinder piston that relatively draws from the output of second place sensor and the prediction of working cylinder piston and the result that will compare are used as the indication of validity of the output of second place sensor.
7. clutch system as claimed in claim 6, it is characterized in that, if the position of the working cylinder piston that draws from the output of second place sensor is dropped in the predetermined tolerance range of position of prediction of working cylinder piston, then can to operate for the output of confirming second place sensor be reliable to electronic controller.
8. such as claim 6 or 7 described clutch systems, it is characterized in that, if the position of the working cylinder piston that draws from the output of second place sensor is dropped on outside the predetermined tolerance range of position of prediction of working cylinder piston, then can to operate for the output of confirming second place sensor be insecure to electronic controller.
9. such as claim 7 or 8 described clutch systems, it is characterized in that, described electronic controller also can operate for definite at least one temperature and based on determined adjustment tolerance range.
10. such as each the described clutch system in the claim 6 to 9, it is characterized in that, described electronic controller also can operate for determining at least one temperature and based on the position of the prediction of determined adjustment working cylinder piston.
CN2009101306193A 2008-03-20 2009-03-18 A method and apparatus of validating an output from a position sensor Active CN101539412B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0805219.3A GB2458498B (en) 2008-03-20 2008-03-20 A method and apparatus for validating the output from a position sensor
GB0805219.3 2008-03-20

Publications (2)

Publication Number Publication Date
CN101539412A CN101539412A (en) 2009-09-23
CN101539412B true CN101539412B (en) 2013-01-16

Family

ID=39386539

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101306193A Active CN101539412B (en) 2008-03-20 2009-03-18 A method and apparatus of validating an output from a position sensor

Country Status (3)

Country Link
CN (1) CN101539412B (en)
DE (1) DE102009008520B4 (en)
GB (1) GB2458498B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8494711B2 (en) * 2010-01-04 2013-07-23 GM Global Technology Operations LLC Automated start-stop systems and methods for internal combustion engines
DE102010055044A1 (en) * 2010-11-08 2012-05-10 Ipgate Ag Piston-cylinder device, for conveying a hydraulic fluid, in particular for a vehicle brake
AT510206B1 (en) * 2011-08-10 2013-05-15 Avl List Gmbh METHOD FOR OPERATING A START-STOP DEVICE
DE102012218255A1 (en) * 2011-10-26 2013-05-02 Schaeffler Technologies AG & Co. KG Method for actuating clutch of drive motor, has displacement sensor which is associated with piston to detect actual distance traveled by gear spindle, which is compared with the predetermined path
DE102012220178B4 (en) 2012-01-26 2022-02-10 Schaeffler Technologies AG & Co. KG Procedure for fault detection in a hydraulic clutch control system
WO2014049751A1 (en) * 2012-09-26 2014-04-03 株式会社小松製作所 Cylinder position measurememt device and cylinder position measurement method
GB2506674B (en) * 2012-10-08 2018-08-08 Ford Global Tech Llc A method for producing an adaptive inferred clutch engagement state
DE102015006196A1 (en) * 2015-05-15 2016-11-17 Wabco Gmbh Device for actuating a clutch and a gearbox and method for controlling
KR101703758B1 (en) 2015-10-20 2017-02-08 현대오트론 주식회사 Method for learning t-s curve of electric motor controled dry clutch system
EP3589857B1 (en) * 2017-03-03 2021-02-24 GKN Automotive Ltd. Method and device for operating a drivetrain

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631656A (en) * 1995-03-01 1997-05-20 Honeywell Inc. Fail safe system with common mode avoidance
US6536389B1 (en) * 2002-04-16 2003-03-25 Ford Global Technologies, Inc. Adaptive control of cylinder valve timing in internal combustion engine
CN1690396A (en) * 2004-04-27 2005-11-02 株式会社日立制作所 Diagnostic system for internal combustion engine
CN1975134A (en) * 2005-11-30 2007-06-06 福特环球技术公司 System and method for providing multi fuel for engine cylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0195463A3 (en) * 1985-03-11 1988-03-16 Applied Power Inc. Hydraulic master-slave cylinder clutch with safety system to assure positive clutch actuation
US5438516A (en) 1993-10-29 1995-08-01 Williams Controls, Inc. Integrated vehicle brake control device position sensor with precalibrated multiple sensor outputs
FR2728517A1 (en) 1994-12-27 1996-06-28 Valeo CONTROL DEVICE FOR MOTOR VEHICLE CLUTCH AND PROCEDURE FOR IMPLEMENTING THIS CONTROL DEVICE
DE10248805A1 (en) 2002-10-19 2004-04-29 Robert Bosch Gmbh Method and device for controlling a vehicle
US7228249B2 (en) 2002-11-19 2007-06-05 General Motors Corporation Methods and apparatus for determining the condition of a sensor and identifying the failure thereof
US7568402B2 (en) * 2006-08-04 2009-08-04 Gm Global Technology Operations, Inc. Method and apparatus for fault-tolerant transmission gear selector lever position determination

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631656A (en) * 1995-03-01 1997-05-20 Honeywell Inc. Fail safe system with common mode avoidance
US6536389B1 (en) * 2002-04-16 2003-03-25 Ford Global Technologies, Inc. Adaptive control of cylinder valve timing in internal combustion engine
CN1690396A (en) * 2004-04-27 2005-11-02 株式会社日立制作所 Diagnostic system for internal combustion engine
CN1975134A (en) * 2005-11-30 2007-06-06 福特环球技术公司 System and method for providing multi fuel for engine cylinder

Also Published As

Publication number Publication date
GB2458498A (en) 2009-09-23
GB2458498B (en) 2012-02-08
DE102009008520B4 (en) 2021-08-26
GB0805219D0 (en) 2008-04-30
CN101539412A (en) 2009-09-23
DE102009008520A1 (en) 2009-09-24

Similar Documents

Publication Publication Date Title
CN101539412B (en) A method and apparatus of validating an output from a position sensor
CN101539179B (en) A method and apparatus for determining the engagement state of a clutch
CN101539174B (en) Method and apparatus for determining the position of clutch-driven piston
US5847272A (en) Function testing device for an actuator system such as a automatic friction clutch used with a motor vehicle gearbox
US6547699B2 (en) Method and apparatus for diagnosing a malfunction of a clutch actuator
US5928110A (en) Power train with automated clutch for use in motor vehicles
CN106460966B (en) Method for determining the contact point variation of the hybrid separation formula clutch of hybrid vehicle
US8118708B2 (en) Method for controlling an automated friction clutch
US6094976A (en) Method of specifying and diagnosing abnormalities in partially-connected clutch stroke levels
GB2370078A (en) Method for operating a transmission device
CN102149947A (en) Engine power management for a selectable one-way clutch or mechanical diode in automatic transmissions
US20160245203A1 (en) Method of controlling the stopping and starting of an engine
US10018233B2 (en) Automatic clutch calibration
CN101539176B (en) Method and apparatus for determining whether leak is present in hydraulic clutch actuation system
CN103711890B (en) A kind of method for being used to infer clutched state
GB2335474A (en) A method of detecting faults in an automated clutch
EP2991873A1 (en) Method for calibrating a clutch control algorithm
CN104002789A (en) Method of producing an adaptive dataset of disengaged clutch pedal positions
CN102951154A (en) A method of controlling a motor vehicle
US6424903B1 (en) Vehicle clutch control device
CN114303021A (en) Method for verifying a valve position of a hybrid drive train having a parking brake and at least one electric motor
KR102540557B1 (en) Method for stuck diagnosis of lubrication control valve of hybrid vehicle
EP2208906B1 (en) Control apparatus and control method for actuator
EP4107404B1 (en) Method for determining the kiss point of a clutch
CN112041595B (en) Method for learning neutral and gear positions of a manual transmission of a vehicle

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant