CN101749424B - Method and device of forming engagement state of manual transmission - Google Patents

Method and device of forming engagement state of manual transmission Download PDF

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Publication number
CN101749424B
CN101749424B CN200910253534.4A CN200910253534A CN101749424B CN 101749424 B CN101749424 B CN 101749424B CN 200910253534 A CN200910253534 A CN 200910253534A CN 101749424 B CN101749424 B CN 101749424B
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gear
strange
threshold value
neutral
shift
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CN101749424A (en
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T·P·彼得里迪斯
I·哈莱罗恩
P·G·布里托
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • 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
    • 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
    • B60W30/192—Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
    • 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
    • F02N11/0833—Vehicle conditions
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/04—Ratio selector apparatus
    • F16H59/044—Ratio selector apparatus consisting of electrical switches or sensors
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H59/70—Inputs being a function of gearing status dependent on the ratio established
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/48—Drive Train control parameters related to transmissions
    • B60L2240/486—Operating parameters
    • 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
    • B60W2510/10—Change speed gearings
    • B60W2510/1005—Transmission ratio engaged
    • 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
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
    • F02N2200/0802—Transmission state, e.g. gear ratio or neutral state
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H2059/6823—Sensing neutral state of the transmission
    • 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
    • F16H—GEARING
    • F16H2312/00—Driving activities
    • F16H2312/14—Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights
    • 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
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention relates to a method and device of forming the engagement state of a manual transmission. The invention discloses a method for determining an upper in-gear signal threshold and a lower in-gear signal threshold of a signal associated with the manual transmission 3 of a micro hybrid vehicle and coming from a magnetic PWM sensor 7. The upper in-gear signal threshold and the lower in-gear signal threshold can be used for confirming whether the manual transmission 3 is in a safe neutral state before an engine starts automatically.

Description

Set up the method and apparatus of the engagement of manual transmission
Technical field
The present invention relates to the method and apparatus of the engagement for confirming manual transmission, and be specifically related to determine the engagement of the manual transmission that is assembled to micro-hybrid vehicle.
Background technique
Known micro-hybrid technology is assembled to hand gear vehicle and makes it possible in the time of stationary vehicle, by calling automatic engine stop and starting and reduce fuel consumption.Can utilize different tail-off (shut down) and restart strategy, as neutral gear stops (SIN) and engage a gear parking (SIG).In SIN and SIG configuration, there is such situation, require the reliable signal of indication speed changer in neutral gear.The launched machine management system stop-start of this signal logic is as the condition that determines whether to allow tail-off or restart.This is to be avoided the safety-critical requirement that transmission system engages the vehicle mobile unintentionally causing owing to starting (crank) motor when.
In SIN system, motor cuts out conventionally in the time of stationary vehicle, and speed changer is in neutral gear and clutch pedal unclamps.In order to restart motor after closing, if detect that speed changer is in neutral gear, driver conventionally triggers and restarts by depressing clutch pedal.
If clutch and braking pedal are depressed, also likely speed changer is hung on gear, conventionally calls SIG and stops, if braking pedal unclamps, clutch keeps being depressed, and conventionally calls SIG and restarts.
In addition, when speed changer is during in neutral gear, what all may require for SIN and SIG application that system causes restarts, thereby prevents that driver is because low battery voltages gets into a difficult position, or guarantees the comfortable of in the Parking extending operator cabin.
Therefore, usually, transmission neutral sensing is the basic demand of operation SIN strategy, and if utilize restarting of system initiation, for SIG system, be also requirement.
Strong and reliable transmission neutral sensing is not the concept of easily implementing, this is due to the tolerance stack/tolerance chain that has mechanical part used in speed changer (tolerance chain), sensor and magnetic tolerance, and the combination of inexactness and external noise factor.In addition, the definition of neutral gear is not concept intuitively.If neutral gear is defined as shifting of transmission bar swivel mount Rotary District, wherein the moment of torsion of transmission is zero, cumulative in given tolerance, measure inexactness and NF in the situation that, this Rotary District too little and accurate sensing conventionally.In addition the cumulative shift level swivel mount rotation neutral gear stop position that affects of speed changer mechanical part tolerance.The in rotary moving of shift level starts to measure from zero degree rotation, and zero degree is the neutral gear stop position in certain variator.This makes to calibrate fixed threshold and becomes complicated to determine the border of any neutral gear window (neutral window) or engage a gear district (in-gear zones), and this border is all effective to all speed changers.Although can learn to grasp the difference of speed changer on neutral gear stop position by (end of transmission-line) the zero off-set study of the transmission line rear end of some form or line of vehicles rear end (end of vehicle-line) zero off-set, but this process has been brought risk, i.e. study may not be executed correctly, or in the time that speed changer is in use changed, study can not be updated, and therefore can in the skew of institute's mastery learning, introduce error.This may cause serious consequence, and unexpected vehicle mobile in stop-start operation, therefore must avoid.
Summary of the invention
The object of this invention is to provide improving one's methods and equipment of a kind of engagement of confirming manual transmission.
According to a first aspect of the invention, provide a kind of indication to there is the method for the engagement of the manual transmission of shift level, whether the location positioning speed changer of this shift level is in strange gear, even gear or neutral gear, wherein the method comprises provides sensor to monitor the position of shift level, monitor the output signal from sensor, for sensor signal is set up strange gear neutral gear threshold value and even gear neutral gear threshold value, if and from the signal of sensor between strange gear neutral gear threshold value and even gear neutral gear threshold value, use the indication in neutral gear as speed changer of this signal.
Described shift level can be gear shift roofbolt, and the rotational position of this gear shift roofbolt can determine that whether speed changer is in strange gear, even gear or neutral gear, and this sensor can monitor the rotational position of gear shift roofbolt.
May further include for set up strange gear neutral gear threshold value and even gear neutral gear threshold value from the signal of sensor strange gear mechanical tolerance and the even gear mechanical tolerance that foundation is associated with speed changer and sensor, be established to the minimum gear shift roofbolt rotation that strange gear pushes, be established to the minimum gear shift roofbolt rotation that even gear pushes, set up strange gear and push tolerance, set up even gear and push tolerance, and use described even gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to strange gear and described strange gear push tolerance and produce described strange gear neutral gear threshold value, and use described strange gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to even gear and described even gear push tolerance and produce described even gear neutral gear threshold value.
Strange gear pushes minimum gear shift roofbolt rotation that threshold value can equal to push to strange gear and deducts strange gear and push tolerance and deduct even gear mechanical tolerance again.
Even gear pushes minimum gear shift roofbolt rotation that threshold value can equal to push to even gear and deducts even gear and push tolerance and deduct strange gear mechanical tolerance again.
The method can further comprise determines whether strange gear mechanical tolerance is less than strange gear and pushes threshold value, and determine whether even gear mechanical tolerance is less than even gear and pushes threshold value, if and only if being less than strange gear, strange gear mechanical tolerance pushes threshold value, and when even gear mechanical tolerance is less than even gear and pushes threshold value, use the signal indication in neutral gear as speed changer from sensor.
According to a second aspect of the invention, a kind of equipment of the operation of controlling micro-hybrid vehicle is provided, this vehicle has: drive the motor that is connected to manual transmission, described manual transmission has shift level, and whether speed changer is in strange gear, even gear or neutral gear described in the location positioning of described shift level; Sensor, for monitoring the position of described shift level; Determination module out of supply, output signal to stop-start controller for receiving from the signal of described sensor and providing, wherein said determination module out of supply operationally monitors the described signal from described sensor, determine that whether described signal level is very between gear neutral gear threshold value and even gear neutral gear threshold value, if and from the described signal of described sensor between described strange gear neutral gear threshold value and described even gear neutral gear threshold value, export the signal of a speed changer in neutral gear to described stop-start controller.
Described shift level can be gear shift roofbolt, and the rotational position of this gear shift roofbolt can determine that whether speed changer is in strange gear, even gear or neutral gear, and this sensor can monitor the rotational position of gear shift roofbolt.
Advantage of the present invention is to provide the reliable indication of the engagement of speed changer, and learns without production line rear end (end of line) zero off-set.
Accompanying drawing explanation
Below by example and with reference to accompanying drawing explanation the present invention, wherein:
Fig. 1 is according to the schematic diagram of the micro-hybrid vehicle of the embodiment of the present invention;
Fig. 2 A is the Local map of the transmission components of the motor vehicle shown in Fig. 1, and it illustrates the position of transmission state sensor and magnetic object;
Fig. 2 B is the schematic diagram that the motion of speed changer swivel mount gear shift roofbolt is shown, the rotational position of this speed changer swivel mount gear shift roofbolt is by transmission state sensor sensing;
Fig. 3 A is the first schematic diagram of swivel mount gear shift roofbolt follower;
Fig. 3 B is the second schematic diagram of the swivel mount gear shift roofbolt follower shown in Fig. 3 A;
Fig. 4 is the block diagram of the data stream between the transmission state sensor shown in Fig. 1 and micro-hybrid stop-start module;
Fig. 5 is the chart illustrating from the relation between output signal and the rotation of swivel mount jack-post of transmission state sensor;
Fig. 6 is the chart that the various factors of the neutral gear threshold value of speed changer shown in the definite Fig. 1 of impact is shown;
Fig. 7 is the flow chart of a kind of method of the engagement of speed changer shown in Fig. 1 of confirmation; And
Fig. 8 A and Fig. 8 B are the flow charts of a kind of method of the neutral gear threshold value of speed changer shown in definite Fig. 1.
Embodiment
First with reference to figure 1-5, it illustrates a kind of micro-hybrid motor vehicles 1, and it has through clutch (not shown) and drives and be connected to the motor 2 of manual transmission/speed changer 3.Electronic controller 4 is provided to the operation of control engine 2 and comprises for automatically stopping and 2 the stop-start controller 6 and for determining the transmission state module 5 of serviceability of speed changer 3 of piloting engine.
Electronic controller 4 is set to receive a large amount of inputs or the signal from sensor 9, comprise from the engine speed of engine speed sensor, from the car speed of vehicle speed sensor, from the clutch pedal position of pedal sensor, from the accelerator pedal position of pedal sensor, one or more from the brake pedal position of pedal sensor, and can receive the information about other assemblies on vehicle, as the serviceability of the charged state of battery (not shown) and air-conditioning unit (not shown).
From the part input of sensor 9 or can be stopped-starter controller of all inputs 6 for determining when that stopping and piloting engine 2 is safe.Be appreciated that stop-start controller 6 and transmission state module 5 can be the parts that separate unit maybe can be formed as Single Electron controller 4, as shown in the figure.
Transmission state module 5 is set to receive from the signal of transmission state sensor 7 of housing 3B that is connected to speed changer 3.Transmission state sensor 7 be magnetic PWM sensor and based on transmission state sensor 7 and and the magnetic object 8 that is associated of swivel mount gear shift roofbolt 3A between variations of flux signal is provided.
Fig. 2 A illustrates typically the configuration of " H door " speed changer, and it is made up of the gear shift swivel mount gear shift roofbolt 3A that is positioned at basic trnasmission housing 3B.In the time that speed change lever (not shown) moves forward and backward to select respectively strange gear and even gear, gear shift swivel mount gear shift roofbolt 3A rotation, and in the time that speed change lever moves left and right to change the plane that speed change lever moves therein, gear shift swivel mount gear shift roofbolt 3A moves axially.According to the configuration of speed changer 3, reverse gear can be configured to strange gear or even gear.
Magnetic object 8 is connected to gear shift swivel mount gear shift roofbolt 3A, and in illustrated example, transmission state sensor 7 is positioned at the outside of gearbox case (housing) 3B and detects the in rotary moving of magnetic object 8.But, be appreciated that transmission state sensor 7 can be arranged in case of transmission 3B.
Fig. 2 B illustrates the movement of magnetic object 8 when different gears are selected.Although in this case, it is upper that magnetic target object 8 is fixed on gear shift roofbolt 3A, so that it moves together with gear shift roofbolt 3A, this not necessarily and in some applications, can connect magnetic object 8 so that it only rotates and does not move axially.
In addition, the movement at shift level between engage a gear and neutral position is in linear application, Linear-moving but not in rotary moving being sensed.
Fig. 3 A and Fig. 3 B illustrate follower 3C, this follower 3C rotates by the rotation of gear shift roofbolt 3A, and follower 3C has three ratchet 3E, and central ratchet is corresponding to neutral position, strange gear ratchet is positioned at neutral gear ratchet one side, and even gear ratchet is positioned at the opposite side of neutral gear ratchet.Shown in ball and spring body 3D engage with in ratchet 3E one, spheroid 3D directly or through support by case of transmission 3B sliding support.Be appreciated that spheroid 3D can be replaced by the spring biasing bolt with hemispherical ends.Ratchet 3E is that speed changer 3 defines neutral position and engage a gear position, particularly the top (peaks) between neutral gear ratchet and engage a gear ratchet determines whether will move into engage a gear (pushing) or enter neutral gear (not pushing) unclamping speed change lever Rear Derailleur 3, this will be described in more detail below.
Fig. 4 illustrates in greater detail the relation between speed changer 3, magnetic object 8, transmission state sensor 7, transmission state module 5 and stop-start module 6, particularly data stream therebetween.
From speed changer 3, can find out and have the physical connection of magnetic object 8 and the physical connection to transmission state sensor 7, the former shows as the mechanical connection of magnetic object 8 to gear shift roofbolt 3A, and the latter shows as the mechanical connection of transmission state sensor 7 to gearbox case 3B.
Between transmission state sensor 7 and magnetic object 8, exist flux to connect, thereby variations of flux can be by transmission state sensor 7 sensings to provide signal, the rotational position of this signal designation gear shift roofbolt 3A, and therefore indicate speed changer 3 whether in strange gear, even gear or neutral gear.Whether attention transmission state sensor 7 only can distinguish speed changer in strange gear (as 1,3,5), even gear (as 2,4,6) or neutral gear, but can not determine the residing accurate gear of speed changer 3.
The signal of transmission state sensor 7 output indication speed changers in strange gear or even gear or neutral gear, and export the whether out of order quality signal of indication transmission state sensor 7 self being produced by transmission state sensor 7.That is to say, transmission state sensor 7 is intelligent sensors and has self diagnostic capability.
In Fig. 4, these signals have been divided into four inputs, but in fact only have two input, a sense position signal and quality signals to transmission state module 5.For more accurate, transmission state sensor 7 output pwm signals, this signal (between 10% to 90%) or outside scope (> 90% or < 10%) in scope.In the time having fault, transmission state sensor 7 produces extraneous signal, therefore in fact only has the output of the physics from transmission state sensor 7.Enter drive software in transmission state module 5 is explained this PWM, if and PWM (> 90% or < 10%) outside scope, enter drive software set quality signal is FAULT (having fault).If pwm signal is (between 10% to 90%) in scope, enter drive software set quality signal is OK (well).Then relatively pwm signal and threshold value of transmission state module 5, to set, whether whether selected, the strange gear of indication neutral gear is selected, the whether selecteed mark of even gear.
The signal of engagement of transmission state module 5 output indication speed changers 3 and the signal of the quality of this output of indication are to stop-start module.In practice, transmission state module 5 compares pwm signal and threshold value in attention, and to arrange, whether whether selected, the strange gear of indication neutral gear is selected, the whether selecteed mark of even gear.
Fig. 5 illustrates that the angle on x axle rotates the typical sensors signal of drawing with respect to gear shift swivel mount gear shift roofbolt.The scope of the sensor signal of PWM in this case, is between 10% to 90% PWM dutycycle.In the time that zero degree rotates, speed changer 3 is positioned at neutral gear, and corresponding nominal sensor signal is 50%.In the time that speed change lever moves forwardly into one of strange gear, sensor signal is reduced to below 50%, and on the contrary, in the time that one of even gear is selected, sensor signal is increased to more than 50%.
Sensor signal outside the scope of 10%-90% is used to the super scope fault mode of transmission state sensor 7 and diagnoses with auxiliary engine management system.Therefore, for example, 5% signal level can indicate transmission state sensor 7 to have fault.
Should be appreciated that, also can arrange transmission state sensor 7 with convenient speed changer 3 when the neutral gear, corresponding nominal sensor signal is 50%, in the time that speed change lever moves forwardly into one of strange gear, sensor signal is increased to more than 50%, and in the time that one of even gear is selected, sensor signal is reduced to below 50%.
With reference now to Fig. 7,, it illustrates the method according to this invention 50, and it provides the indication of the engagement of speed changer 3.
After starting, method enters step 100, is wherein that speed changer 3 is determined strange gear neutral gear threshold value and even gear neutral gear threshold value.Strange gear neutral gear threshold value is the maximum safety signal level that can guarantee to exist neutral gear in strange gear direction, and even gear neutral gear threshold value is the maximum safety signal level that can guarantee to exist neutral gear in even gear direction.The technology that is used for setting up these threshold values will illustrate in greater detail with reference to figure 8A and Fig. 8 B below.
After step 100, be step 110, wherein transmission state module 5 monitors the output from transmission state sensor 7.That is to say, be provided for transmission state module 5 from the signal of transmission sensors 7.
Strange gear neutral gear threshold value and even gear neutral gear threshold value are stored in transmission state module 5, and the signal receiving from transmission state sensor 7 by repeatedly with these threshold value comparisons, thereby determine that they are whether in these threshold limits.If from the signal of transmission state sensor 7 between strange gear neutral gear threshold value and even gear neutral gear threshold value, this shows that speed changer 3 is in neutral gear, or more precisely, thereby speed changer can not transmit enough moments of torsion causes the danger of vehicle 1 to move in the time that motor 2 is restarted, and method enters step 114.
In step 114, speed changer is sent to stop-start controller 6 in the signal of neutral gear, thereby meeting when stopping or piloting engine any other condition of 2, allows to occur automatically stopping and starting of vehicle 1.
On the contrary, if from the signal of transmission state sensor 7 not between strange gear neutral gear threshold value and even gear neutral gear threshold value, this show speed changer 3 in engage a gear or, or more precisely, thereby speed changer can transmit enough moments of torsion causes the danger of vehicle 1 to move in the time that motor 2 is restarted, and method enters step 113.
In step 113, speed changer is sent to stop-start controller 6 in the signal of engage a gear, thereby the in the situation that of SIN micro-hybrid vehicle, prevent the automatic starting of vehicle 1, or the in the situation that of SIG micro-hybrid vehicle, prevent the starting of motor 2, unless piloted engine, other conditions of 2 all meet, as clutch departs from.
With reference now to Fig. 8 A and Fig. 8 B,, it illustrates in greater detail the method 100 for determining strange neutral gear border and even neutral gear border.
After beginning, the method enters step 101, calculates the mechanical tolerance being associated with speed changer 3 that may affect signal output here.Mechanical tolerance T mechthe mechanical transmission tolerance being formed by time-independent noise, when speed changer 3 is during in its neutral gear stop position, these influence of noise sensor signals and not changing with the rotation of gear shift roofbolt.Go out mechanical tolerance T from cumulative speed changer mechanical tolerance and NF analytical derivation thus mech, the combined effect transmission neutral stop position of the two.If study is considered to necessary, these are can be by the noise of zero off-set learning and mastering.T mechin Fig. 6, draw and represent the possible range of the neutral gear stop position of speed changer 3.
Then the method enters step 102, and here nominal neutral gear window edge is defined.The general neutral gear definition that requires to transmit zero moment of torsion need not be in the method, but the limitation standard that speed changer " pushes " is used to define neutral gear.
Pushing boundary is such position, if motor 2 is started by starter motor, clutch pedal discharges, and shifting of transmission roofbolt 3A is in being less than the displaced position that pushes boundary, speed changer 3 will be forced to return neutral position, if but shifting of transmission roofbolt 3A is positioned at the position pushing outside boundary, speed changer 3 will be " pushed " into gear and vehicle 1 is easy to stroboscopic motion and movement.
Therefore, push that boundary is regarded as secure threshold and as nominal neutral gear window edge.It will be understood by those skilled in the art that while being positioned likely transmitting torque before speed changer 3 is pushing, but only under condition below: engine running, clutch is not depressed, and then driver applies sizable power to speed change lever.Under these conditions, vehicle 1 is suitable for going slowly.But under the background of stop-start operation, these conditions are difficult to meet in the event of starting, because if motor 2 is static, need not applies large active force to speed change lever without clutch pedal in the situation that and select gear.This means that speed changer 3 will be moved through easily pushes boundary, and transmission state sensor 7 will detect this event.Therefore after motor starts beginning soon, driver must apply energetically speed change lever, and without clutch pedal, because the possibility of vehicle mobile is minimum.In addition, in order to meet current safety standard, if acceleration is less than 0.25m/s 2, it is acceptable that vehicle 1 moves forward, and that is to say, and vehicle 1 is mobile in 2 seconds is less than 0.5 meter, and this is enough can in the situation that not damaging Security, make a response slowly because this moves concerning driver.
With reference to figure 6, suppose the speed changer of worst-case conditions, Δ minpI evenand Δ minpI oddbe illustrated respectively in even gear direction and strange gear direction from neutral gear stop position to the minimum axle rotation that may push the earliest.
Referring again to Fig. 8 A, next step is to calculate to push measurement tolerance PI in even gear direction tOLevenwith in strange gear direction, push measurement tolerance PI tOLodd.
PI tOLevenand PI tOLoddbe the tolerance being made up of the noise that affects sensor signal, these noises change with the rotation of gear shift roofbolt 3A, and comprise and affect Signal gradient and time-independent noise and time dependent noise.These noises can not be by zero off-set learning and mastering.
PI tOLevenand PI tOLoddbe may push the earliest and given all NF situations under necessity buffering between 7 precision that can measure of transmission state sensor.
Then the method enters step 104, and this step is to determine whether to require the zero off-set study of production line rear end or no use from the signal of transmission state sensor 7 and without the inspection of zero off-set study.If T mech< (Δ minpI even-PI tOLeven)/2 and T mech< (Δ minpI odd-PI tOLodd)/2 item can be used from the signal of transmission state sensor 7 and learn without zero off-set, and the method enters step 106.
But, if one of test in step 104 can not meet, the method enters step 105, must before without production line rear end zero off-set study, reduce in use tolerance, standard and the NF of speed changer 3, magnetic object 8 and transmission state sensor 7 here from the signal of transmission state sensor 7.Reduce tolerance stack-ups (stack) and may relate to deflation member or component specifications, or reduce or eliminate external noise factor as temperature.After step 105, the method is returned to step 101, then repeating step 101 to 103 before again performing step 104.
If two conditions of step 104 can not meet again, show fully to tighten member or component specifications or reduce or eliminate external noise factor as temperature, the method enters step 107.In step 107, the method finishes, and requires the skew study of production line rear end.But if the condition of step 104 meets, the method enters step 106.
Notice that in fact step 104 comprises inequality condition, in fact it check neutral gear Windows calibration border PI evenThreshand PI oddThreshdrop on by strange gear mechanical tolerance T mechoddwith even gear mechanical tolerance T mechevenoutside the region limiting, (in Fig. 6, be only shown T mech).This is because if be not like this, and neutral position can not accurately directly be determined from transmission state sensor signal.
In step 106, neutral gear window edge PI evenThreshand PI oddThreshequation calculating with below: PI evenThresh=Δ minpI even-PI tOLeven-T mech oddpI oddThresh=Δ minpI odd-PI tOLodd-T mech evenpI evenThreshand PI oddThreshbe final safe neutral gear window edge, it is stored in transmission state module 5, be used for and from the signal comparison of transmission state sensor 7 to determine that whether speed changer 3 is in neutral gear.
That is to say, if: PI oddThreshthe position < PI of < transmission state sensor signal evenThreshthe signal that neutral gear exists is sent to stop-start controller 6 from transmission state module 5, otherwise speed changer is not sent to start-stop controller 6 at the signal of neutral gear.
Generally speaking, the invention provides the whether signal in neutral gear and without the method for production line rear end zero off-set study of a kind of calibrating transmission state sensor signal output indication speed changer.
Although by using PWM magnetic sensor or PLCD (the linear contactless displacement of permanent magnetism) sensor to describe the present invention, wherein PLCD uses magnet and produces the PWM output for transmission state sensor (being sometimes referred to as LVDT sensor), but should be appreciated that the displacement transducer that also can use other types, for example, use magnet and produce the hall effect sensor of PWM output.And, the invention is not restricted to use the sensor that produces PWM output; The present invention can be applicable to equally use and produces variable voltage output but not the displacement transducer of PWM output signal.
It will be appreciated by those skilled in the art that, although the mode with example has been described the present invention by reference to one or more embodiments, but the invention is not restricted to disclosed embodiment, and can in the case of not departing from the scope of the invention of claim restriction, conceive one or more modifications or the alternative embodiment to disclosed embodiment.

Claims (6)

1. an indication has the method for the engagement of the manual transmission of shift level, described in the location positioning of described shift level, whether speed changer is in strange gear, even gear or neutral gear, wherein the method comprises provides sensor to monitor the position of described shift level, monitor the output signal from described sensor, for set up strange gear neutral gear threshold value and even gear neutral gear threshold value from the described signal of described sensor, if from the described signal of described sensor between described strange gear neutral gear threshold value and described even gear neutral gear threshold value, use the indication in neutral gear as described speed changer of described signal, wherein said shift level is gear shift roofbolt, the rotational position of described gear shift roofbolt determines that whether described speed changer is in strange gear, even gear or neutral gear, and the described rotational position of gear shift roofbolt described in described sensor monitoring, wherein for set up strange gear mechanical tolerance and the even gear mechanical tolerance that strange gear neutral gear threshold value and even gear neutral gear threshold value further comprise that foundation is associated with described speed changer and described sensor from the described signal of described sensor, be established to the minimum gear shift roofbolt rotation that strange gear pushes, be established to the minimum gear shift roofbolt rotation that even gear pushes, set up strange gear and push tolerance, set up even gear and push tolerance, and use described even gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to strange gear and described strange gear push tolerance and produce described strange gear neutral gear threshold value, and use described strange gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to even gear and described even gear push tolerance and produce described even gear neutral gear threshold value.
2. method according to claim 1, wherein said strange gear pushes threshold value and equals the described minimum gear shift roofbolt pushing to strange gear and rotate and deduct described strange gear and push tolerance and deduct described even gear mechanical tolerance again.
3. method according to claim 1, wherein said even gear pushes threshold value and equals the described minimum gear shift roofbolt pushing to even gear and rotate and deduct described even gear and push tolerance and deduct described strange gear mechanical tolerance again.
4. method according to claim 2, wherein said even gear pushes threshold value and equals the described minimum gear shift roofbolt pushing to even gear and rotate and deduct described even gear and push tolerance and deduct described strange gear mechanical tolerance again.
5. according to the method described in any one in claim 1-4, wherein said method further comprises determines whether described strange gear mechanical tolerance is less than described strange gear and pushes threshold value, and determine whether described even gear mechanical tolerance is less than described even gear and pushes threshold value, if and only if being less than described strange gear, described strange gear mechanical tolerance pushes threshold value, and when described even gear mechanical tolerance is less than described even gear and pushes threshold value, use the described signal indication in neutral gear as described speed changer from described sensor.
6. control the equipment of the operation of micro-hybrid vehicle for one kind, described micro-hybrid vehicle has: drive the motor that is connected to manual transmission, described manual transmission has shift level, and whether speed changer is in strange gear, even gear or neutral gear described in the location positioning of described shift level, sensor, for monitoring the position of described shift level, determination module out of supply, output signal to stop-start controller for receiving from the signal of described sensor and providing, wherein said determination module out of supply operationally monitors the described signal from described sensor, for set up strange gear neutral gear threshold value and even gear neutral gear threshold value from the described signal of described sensor, determine that whether described signal level is very between gear neutral gear threshold value and even gear neutral gear threshold value, if and from the described signal of described sensor between described strange gear neutral gear threshold value and described even gear neutral gear threshold value, export the signal of a speed changer in neutral gear to described stop-start controller, wherein said shift level is gear shift roofbolt, the rotational position of described gear shift roofbolt determines that whether described speed changer is in strange gear, even gear or neutral gear, and the described rotational position of gear shift roofbolt described in described sensor monitoring,
Wherein for set up strange gear mechanical tolerance and the even gear mechanical tolerance that strange gear neutral gear threshold value and even gear neutral gear threshold value further comprise that foundation is associated with described speed changer and described sensor from the described signal of described sensor, be established to the minimum gear shift roofbolt rotation that strange gear pushes, be established to the minimum gear shift roofbolt rotation that even gear pushes, set up strange gear and push tolerance, set up even gear and push tolerance, and use described even gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to strange gear and described strange gear push tolerance and produce described strange gear neutral gear threshold value, and use described strange gear mechanical tolerance, the described minimum gear shift roofbolt rotation pushing to even gear and described even gear push tolerance and produce described even gear neutral gear threshold value.
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