CN103362664A

CN103362664A - A method of producing a control output from a clutch position sensing system of a motor vehicle

Info

Publication number: CN103362664A
Application number: CN2013101171722A
Authority: CN
Inventors: T·P·彼得里迪斯; C·E·派德勒; D·海斯凯兹; I·哈莱罗恩
Original assignee: Ford Global Technologies LLC
Current assignee: Ford Global Technologies LLC
Priority date: 2012-04-05
Filing date: 2013-04-07
Publication date: 2013-10-23
Anticipated expiration: 2033-04-07
Also published as: DE102013205315A1; RU2627952C2; GB2500932A; GB201206179D0; RU2013115132A; CN103362664B; GB2500932B

Abstract

The present invention disclose a method, in which when the position of a clutch pedal is determined within a clutch travel transition zone where the clutch pedal may be of one of a pressed state and a release state, a movable threshold is at one side where a current clutch pedal state is opposite to a clutch pedal position state and is a small distance away from the side of the clutch pedal position. In this manner, if the clutch pedal position moves to the movable threshold and passes the movable threshold, the state changes from a current state to another state. If the clutch pedal position moves away from the threshold, the threshold will follow the clutch pedal in a tailing manner.

Description

Be used for producing from the clutch position detection system of motor vehicle the method for control output

Technical field

The present invention relates to have the motor vehicle of explosive motor, particularly relate to and have the motor vehicle that automatically stop and starting at least in part the system of this explosive motor according to the clutch jointing state.

Background technique

It is known that motor vehicle with manual transmission are provided, and it has for automatically stopping and starting the stop-start system that the explosive motor of driving force is provided for these motor vehicle.

When being determined with chance and stopping explosive motor, stop-start system will stop explosive motor automatically, in order to improve fuel consumption and reduce effulent from motor.

Use for the manual transmission start-stop, " clutch pedal force down/clutch pedal discharge " threshold value is commonly used to the intention that represents that the driver drives away car when clutch is depressed, so the start-stop system starting of can piloting engine.Same threshold value when also can be used for representing the driver the disconnecting clutch pedal and want to keep static long enough so that start-stop system can switching engine to closing, with fuel saving.

The clutch pedal releasing state are typically used as the condition that the start-stop system operation authenticity/rationality (plausibility) relevant with this stop-start system checks.This authenticity test setting became before start-stop is enabled must be passed through once in each key-circulation (key-cycle).An example of this authenticity test is for known velocity ratio, to check whether the gear sensor signal is with consistent with the estimation to current driven gear of the ratio of car speed according to engine speed.If this test is passed through, the expression gear sensor is correctly worked.

In order to carry out continuously this compare test, essential not slip that is to say between clutch disk when testing, and clutch is essential to be engaged.The condition that the expression power train engages fully is to check whether clutch pedal discharges by biting point (bite-point).Therefore, if " clutch pedal force down/clutch pedal discharge " threshold value setting with respect to the biting point more-position of releasing the pedal, the clutch pedal releasing state can be as the condition of carrying out this test.

Utilize this fixed clutch pedal force down/clutch pedal discharges that its problem is to exist according to the threshold value starting/stopping availability of calibration and trading off of cornering ability attribute in the situation of threshold value.In order when the driver forces down clutch pedal, to provide the time as much as possible to pilot engine, wish high as far as possible pedal travel is set, for example force down 10%.This is not force down clutch pedal position very far away from complete release position for the starting driver that pilots engine.This set improves motor starting characteristic or the serious hope to starting of awaring.Become a problem at the top of very close pedal travel to be threshold value setting, many drivers (actual test shows about 35% to 40% order of magnitude) are shelved on its pin on the clutch pedal, sometimes be called control/pin and park (riding) clutch, perhaps in the situation that clutch engages fully when gear travels and/or clutch engage and the situation of retarder in neutral under during stationary vehicle, and therefore will always surpass threshold value.

Fig. 2 illustrates three kinds of clutch states, and discharge, force down (press) and depress (depress), and the switching threshold between the state.These three kinds of states are used in the application of neutral parking start-stop now usually.

Distinguish at " R ", clutch pedal is considered to discharge, that is to say that clutch necessarily engages, distinguish at " D ", clutch pedal is considered to depress and clutch necessarily breaks away from, and is considered to be depressed and can break away from or engage at the position clutch that " P " distinguishes according to clutch at " P " district clutch pedal.

The most significant threshold value force down and releasing state between, by Th _RPExpression.

Consider now four kinds of possible situations, at the first situation Th _RPBe configured to clutch and step on 10% of stroke, at the second situation Th _RPBe configured to clutch and step on stroke moving 30% and driver and fully its pin is removed from clutch pedal, at the third situation Th _RPBe configured to clutch and step on 10% and driver's solenoidoperated cluthes pedal of stroke and step on 25% of stroke so that its keeps forcing down clutch, at the 4th kind of situation Th _RPBeing configured to clutch steps on 30% and driver's solenoidoperated cluthes pedal of stroke and steps on 25% of stroke so that its keeps forcing down clutch.

Starting will be very rapid and can obtains time for the authenticity test in the first situation;

Starting will be not response in the second situation, because in order to realize that the starting clutch pedal must depress 30%.But having completely, the time is used for the authenticity test;

Motor will not stop in the third situation, because usually can not cross threshold value Th _RPTherefore and authenticity examination can not occur; And

In the 4th kind of situation, will start and to be used for very rapid and if having time the authenticity test.

Therefore, the problem that situation exists in the second and the 3rd is to cause the one or more of relatively poor stop-start performances of awaring, the workability of depressing of start-stop operation and as authenticity test the deexcitation that can not cause stop-start system, then may cause the driver to obscure.

Summary of the invention

An object of the present invention is to provide improving one's methods and equipment of a kind of stop-start operation that is installed in the motor on the motor vehicle with manual transmission for control, it reduces to problem above-mentioned minimum or eliminates problem above-mentioned.

According to a first aspect of the invention, a kind of method that produces control output from the clutch position detection system is provided, wherein the method comprises the position of the clutch pedal of monitoring equipment motor vehicle, restriction is by the transition zone of the circumscription of clutch pedal position, forced down by clutch pedal releasing state and clutch pedal that state consists of two kinds alternately a kind of in the state of clutch pedal position in control output described in this transition zone, movable threshold shift with the clutch pedal initial position is set, if pass this threshold value, then when described clutch pedal position is in described transition zone, to cause the change of clutch pedal position state, if and described movable threshold value is through, then described control output is changed to another kind of state from current state.

The method can also comprise the peak excursion that described movable threshold value and described clutch pedal position are set.

If stating the state of clutch pedal in place, described clutch pedal initial position is described releasing state, then the amplitude of described movable threshold value can be greater than the amplitude of described clutch pedal initial position.

If stating the state of clutch pedal in place, described clutch pedal initial position is the described state that forces down, then the amplitude of described movable threshold value can be less than the amplitude of described clutch pedal initial position.

If the clutch pedal position is in transition zone, the method can also comprise if final clutch pedal position, then defines this clutch pedal position state less than movable threshold value for discharging.

If the clutch pedal position is in transition zone, the method can also comprise if final clutch pedal position, then defines this clutch pedal position state more than or equal to movable threshold value for forcing down.

When described clutch pedal position and described movable threshold value are all in described transition zone, the method can also comprise if described clutch pedal position moves away described movable threshold value from described clutch pedal initial position, and then mobile described movable threshold value is so that the predetermined migration of maintenance and described clutch pedal position.

If move from the clutch pedal initial position towards described movable threshold value from the described device pedal position that closes, then the amplitude of described movable threshold value can keep identical, exceeds described movable threshold value intended distance position until has moved described clutch pedal position.

The lower end of described transition zone can be defined by the clutch pedal position lower limit, and the upper end can be defined by the clutch pedal position upper limit.

Discharging the district can be defined by the complete release position of clutch and clutch pedal position circumscription that the upper end is defined by the clutch pedal position lower limit by an end, and when described clutch pedal position is in described release district, the clutch pedal position state of release can be always indicated in described control output, and forcing down the district can be defined by the clutch pedal position upper limit and clutch pedal position circumscription that end opposite is limited by fixing upper threshold value by an end, and whenever described clutch pedal position described when forcing down in the district, described control is exported can always indicate the clutch pedal position state that forces down.

Depressing the district can be defined by fixing upper threshold value and clutch pedal position circumscription that end opposite is defined by the complete depressing position of clutch pedal by an end, and whenever described clutch pedal position described when depressing in the district, described control is exported can always indicate the clutch pedal position state of depressing.

The skew of described movable threshold value and described clutch pedal initial position can limit the conversion window that is at one end defined by the position of described movable threshold value and defined by described beginning clutch position in end opposite, and described conversion window always is located at described beginning clutch position towards a side in the clutch position district of another kind of clutch position state.

The method can also comprise when calculating described movable threshold value, just regulates very little amount of described movable threshold value to allow unintentional clutch pedal position to change.

Regulating described movable threshold value can comprise, when calculating described movable threshold value, just increases from described beginning clutch pedal position to the described very little amount of the described skew of described movable threshold value.

If the amplitude of described movable threshold value is added the currency of described movable threshold value greater than described beginning clutch position to by the amount that this is very little, described skew can be increased.

Replacedly, if the amplitude of described movable threshold value then deducts described very little amount by the currency from described movable threshold value less than described beginning clutch position, described skew can be increased.

Described very little amount can be less than 1% of the value of described skew.

The method can also comprise described control output is offered the stop-start system of motor vehicle from described clutch position detection system, is used for controlling the stopping and starting of motor of described motor vehicle.

According to a second aspect of the invention, a kind of clutch pedal position for detection of motor vehicle is provided and the clutch position detection system of control output of the location status of the described clutch pedal of indication is provided, this system comprises the position detecting device and the electric clutch pedal position processor of processing from the described signal of described position detecting device of the signal that the current clutch pedal position of indication is provided, if wherein described clutch pedal position is in the transition zone that the fixed upper limit by the fixedly lower limit of clutch pedal position and clutch pedal position defines, in described transition zone, the state of described clutch pedal position is release and forces down one of them, thereby described electric clutch pedal position processor can move the movable threshold value that arranges with the clutch pedal initial position, if this movable threshold value is through, then when described clutch pedal position is in described transition zone, will cause the change of clutch pedal position state, if and described movable threshold value is through, then with described control output from indicating current clutch pedal position state to change into the another kind of clutch pedal position of indication state.

If stating clutch pedal in place, described clutch pedal initial position is in the described releasing state, then described electric clutch pedal position processor can move and thereby described movable threshold value is set in order to have amplitude greater than described clutch pedal initial position amplitude, if and state clutch pedal in place, described clutch pedal initial position and be in described forcing down in the state, thereby then described electric clutch pedal position processor can move and described movable threshold value is set in order to have amplitude less than described clutch pedal initial position amplitude.

Thereby described electric clutch pedal position processor can move the peak excursion that described movable threshold value and described clutch pedal position are set.

Thereby described electric clutch pedal position processor can also be able to move, and when calculating described movable threshold value, regulates very little amount of described movable threshold value, changes to allow unintentional clutch pedal position.

Thereby described electric clutch pedal position processor can move described control output is supplied to the stop-start system of motor vehicle from described clutch position detection system, is used for controlling the stopping and starting of motor of described motor vehicle.

According to a third aspect of the invention we, a kind of motor vehicle are provided, and these motor vehicle have motor, jointing state by the clutch of clutch pedal control, the change in location according to this clutch pedal stops and starting the system of this motor and the clutch pedal detection system for detection of this clutch pedal position of second aspect according to the present invention structure automatically at least.

Description of drawings

The present invention is described below with reference to the accompanying drawings by way of example, wherein:

Figure 1A is the schematic representation that has according to the motor vehicle of stop-start system of the present invention;

Figure 1B is the schematic representation of clutch actuation system of a part that forms the stop-start system of Fig. 1;

Fig. 2 is the schematic representation that illustrates according to the operating range of the clutch pedal motion in three predetermined districts of prior art;

Fig. 3 is the schematic representation that illustrates according to the operating range of the clutch pedal in four predetermined districts of the present invention motion;

Fig. 4 illustrates the flow chart that produces the first embodiment of the method for controlling output from clutch position detection system according to the present invention;

Fig. 5 illustrates the flow chart that produces the second embodiment of the method for controlling output from clutch position detection system according to the present invention;

Fig. 6 is the schematic representation that the state conversion that six clutch positions change and cause is shown.

Embodiment

With reference to Figure 1A and 1B, Figure 1A and 1B illustrate the motor vehicle 5 with the motor 10 that drives multi-speed transmission 11.This speed changer 11 is not shown by clutch 8(Figure 1A) can be drivingly coupled to motor 10, this clutch 8 is manually engaged by the driver of motor vehicle 5 or discharges and have a gear selector (not shown).This gear selector is movable between several positions, selecteed at least one position of the gear that these several positions comprise a part that forms multi-speed transmission and do not select the neutral gear position of the gear of multi-speed transmission.When gear selector moves to neutral gear position, it is to be in neutral position state that multi-speed transmission 11 is said to be, driving at neutral position state can not be by the multi-speed transmission transmission, and when gear selector moves to transmission gear, multi-speed transmission 11 is said to be gear (in gear) state that is in, and driving at range state can be by the multi-speed transmission transmission.

The engine primer of integrated actuating device-generator 13 forms can be drivingly coupled to motor 10 and be connected in this case the bent axle of motor 10 by the flexible actuator that drives belt or chain drive 14 forms.This starter-generator 13 is connected in the power supply of storage battery 15 forms and is used for piloting engine 10, and when it during as generator operation this power supply recharged by starter-generator.The invention is not restricted to utilize starter-generator 13 and starter-generator 13 can be used to pilot engine 10 starter to replace.

Should be understood that at motor 10 during starts starter-generator 13 drives the bent axle of motor 10, and drive to produce electric energy at the launched machine 10 of this starter-generator of other times.

The exercisable on/off device of driver of key operated key 17 forms is used for total operation of control engine 10.That is to say, motor 10 operations when key 17 is in " key-connection " position, and when key 17 was in " key-disconnection " position, motor 10 can not move.Key 17 also comprises the 3rd instantaneous position for manual starting motor 10.Should be understood that and to utilize other devices to provide this functional and the invention is not restricted to utilize key.

Electronic control unit 16 is connected in starter-generator 13, motor 10, be used for monitoring this speed changer be at neutral or gear gear selector sensor 12, be used for measuring the rotational speed of wheel 20 vehicle speed sensor 21, be used for the brake pedal position sensor 24, the throttle position sensor 19 that the clutch pedal position detection system and being used for that is used for monitoring the position of clutch pedal 25 is monitored the position of accelerator pedal 18 of position of monitors brake pedal 23.This accelerator pedal 18 provides the driver's input from the power stage of motor 10 about requiring.If accelerator pedal 18 has moved from position of rest, it is generally acknowledged that accelerator pedal 18 is in to force down the position or be in the state of forcing down.

Although top reference wheel sensor 21 has been described the measurement of motor vehicle speed, but because this sensor is as the parts of antilock braking system (ABS) usually Already on the motor vehicle, so be understood that, can utilize other suitable devices to determine the speed of motor vehicle 5, for example measure the sensor from the rotational speed of the output shaft of speed changer 11.

Should be understood that term gear selector sensor is not limited to monitor the sensor of the position of this gear selector, and can be that speed changer 11 can be provided is any device in the feedback of gear or neutral gear.

Equally, the term brake pedal sensor is not limited to the sensor of monitors brake pedal position, and whether the operator that can provide motor vehicle 5 exerts pressure with any device of the feedback that motor vehicle 5 applied braking to brake petal 23.For example, brake pedal sensor can be monitored the pressure of fluid in one or more braking line.When brake petal 23 has been forced down to apply when braking fully, it is generally acknowledged that brake petal is in to force down lower state or be in to force down the position.

In this case, the clutch pedal position detection system comprise monitoring clutch pedal 25 physical location linear position sensor 26 and be used for the position signal from clutch position sensor 26 is processed into the EC3P16C that is stored in the control output that the electronic control unit 16 of the logic among electric clutch pedal position processor (EC3P) 16C uses by utilization.

Clutch position sensor 26 can comprise one or more position transducer, for example rotating potentiometer.

Determining that EC3P16C by the parts that form electronic control unit 16 utilizes from the clutch position signal of position transducer 26 receptions and carry out as the state of the clutch pedal 25 that forces down or discharge.The current location (CP) of this clutch position signal indication clutch pedal 25.

As shown in Figure 1B, in this case, the clutch actuation system engages and the clutch trip lever 29 of releasing clutch 8 forms by the secondary cylinder 28 of clutch pedal 25, hydraulic main cylinder 27, hydraulic pressure with via release bearing 9.But, should be understood that and can convert the motion of clutch pedal 25 joint or the disengaging of clutch 8 to other devices, and the invention is not restricted to utilize the hydraulic coupling actuating system.

Be to be further appreciated that electric clutch pedal position processor (EC3P) 16C can be independent unit and the parts that can not form main stop-start electronic control unit 16.

Electronic control unit 16 receives the some signals from motor 10, comprises the signal from the rotational speed of the expression motor 10 of velocity transducer (not shown), and signal is sent to motor, is used for shutdown and the starting of control engine 10.In this case, motor 10 is motors 10 of spark ignition and is used for the fuel supply system (not shown) of control engine 10 and the ignition system (not shown) of motor 10 from the signal that electronic control unit 16 sends.If motor 10 is diesel engine, only have so the fuel of supply engine to be controlled.Electronic control unit 16 is made of various elements, comprise central processing unit, storage device, timer and signal processing apparatus, it will convert to from the signal of the sensor that is connected in this electronic control unit 16 by this electronic control unit 16 employed data, with the operation of control engine 10, control engine 10 automatically stops and starting specifically.

At normal motor run duration, this electronic control unit 16 is exercisable, supply with and the point of adjustment ignition system to the fuel of motor with control so that spark the correct moment from spark plug supply engine 10, to produce the engine torque of wishing.

Electronic control unit 16 control is with the operation of the motor 10 of two kinds of mode operations, and namely first or automatic stop-start operating mode and second or continuous operation mode.But, should be understood that one or more independent electronic controller can be used for only conversion and automatically the stopping and starting of motor 10 of control engine 10 between two kinds of operating modes of the normal operation of control engine 10 and electronic control unit 16.

Electronic control unit 16 further can operate, with suitable with first mode operation motor 10 by checking that one or more engine operating parameter determines whether before allowing with the first mode operation.

These engine operating parameters comprise engine coolant temperature, any catalytic conversion agent relevant with this motor, and whether ignition and motor rotate in predetermined speed range.For example, if coolant temperature is lower than, such as, 65 ° of C or catalytic conversion agent is nonflammable or engine speed greater than, such as per minute 1100 turns (RPM), then prevents from entering first mode, and thereby electronic control unit 16 can move with warming-up mode operation motor 10, in the warming-up pattern motor 10 continuously operation no matter motor vehicle 5 are to move or static.

When one or more preset engine stops to exist with starting conditions, as long as just determine that engine operating condition satisfies, and just is arranged on this stop-start system in the first operating mode.

These engine stops and starting conditions are used for basis by signal the stopping in neutral system of this electronic control unit 16 from gear selector sensor 12 and EC3P16C reception.If be not depressed and selected from the signal indication neutral of gear selector sensor 12 from the control of EC3P16C output expression clutch pedal 25, then motor 10 stops, and when the control output expression clutch pedal 25 from EC3P16C is depressed, then motor 10 is reset, perhaps immediately starting or starting when the gear selector sensor represents that neutral is no longer selected.

Should be understood that another operating mode by the utilization of many systems is whether motor vehicle 5 move.In this case, if the speed of motor vehicle 5 is higher than predetermined low speed, then be under an embargo with the first mode operation.

With reference now to Fig. 3,, Fig. 3 illustrates EC3P16C in the mode of illustrating and how will process in the Operational Zone from the signal of clutch pedal position sensor 26 according to the percentage of the position of depressing fully.

In " R " district, will represent that from the control of EC3P16C output clutch pedal 25 is released, that is to say that clutch 8 is engaged.

In " D " district, will represent that from the control of EC3P16C output clutch pedal 25 is depressed (depress), and clutch 8 is broken away from.

" P " that be positioned at wherein in the biting point of clutch 8 distinguishes, and exports from the control of EC3P16C to represent that clutch pedal 25 is depressed (press).

In transition zone " P or R ", will be according to the position of depending on clutch pedal 25 and motion from the control output of EC3P16C.

Discharge district " R " by 0% lower limit and be that 10% predetermined fixed upper limit limits in this case.

Depress district " D " by 100% the upper limit and be that the predetermined fixed threshold Th2 of 70% Th2 determines in this case.

Transition zone " P or R " is determined by predetermined fixedly lower limit L1 with by the predetermined fixed upper limit Lu that is in this case 30%.Should predetermined fixed upper limit Lu be chosen to so that it has less than the biting point of the expection of clutch 8 greater than owing to control the positional value that (ride) clutch pedal 25 makes the positional value that these clutch pedal 25 displacements cause by the driver.

Forcing down district " P " is determined by predetermined fixedly lower limit Lu and predetermined fixed threshold Th2.

Another movable tracking threshold value Th1 moves in transition zone " P or R " and is limited by lower limit L1 and upper limit Lu.That is to say.Lu≥Th1≥L1。

With reference now to the total operation that is numbered " A " at Fig. 3 and arrives six kinds of exemplary state conversion specification EC3P16C of " F ".

State conversion " A " illustrates along the conversion of direction in exceeding the clutch pedal position (CP) of forcing down that discharges.The upper limit Lu that passes transition zone along this direction will cause that control output state from EC3P16C is from forcing down to the variation that discharges.

The clutch pedal position moves to the state conversion " C " of forcing down the district from transition zone and will always cause and force down output.Whether change of state occurs when fixed upper limit Lu is through will be decided by that original state is release or forces down.

Clutch pedal position CP causes exporting from discharging the district to forcing down district's conversion from the control of EC3P16C to the state conversion " E " that transition zone passes lower limit L1 from discharging the district.

State conversion " F " illustrates above the conversion of transition zone passes fixedly lower limit L1 along release direction.If state originally is to force down state, the fixedly lower limit L1 that then passes transition zone along this direction will always cause from the control output of EC3P16C and change to releasing state from forcing down state, if perhaps original state is releasing state then to keep this state be releasing state.

State conversion " B " illustrates, after depressing minimizing such as the clutch pedal of clutch conversion " A ", the clutch pedal position in transition zone towards the motion (depressing increase) of depressing position.That is to say that clutch is released to clutch pedal position X0, wherein X0 is illustrated in the clutch pedal position that discharges most in the border of transition zone, and now moves along opposite direction, so clutch pedal is depressed increase.X1 is the final stop place of clutch pedal, and " X " is the displacement of clutch pedal.

Conversion window (Fig. 3 is not shown) is positioned at the side of forcing down of clutch pedal position X0, and the width of conversion window is predetermined a small amount of " w " in this case, and this is " w " skew between original position X0 and tracking threshold value Th1 in a small amount.The position of conversion window is to be this skew " w " because tracking threshold value Th1 follows or trail the amount of the position of clutch pedal 325 in the side of forcing down of X0, and the motion of arrival X0 is from forcing down towards release.In the example shown, shown X1 is illustrated the distance " X " that equals " w " from the X0 displacement, so it is positioned at threshold value Th1, and because tracking threshold value Th1 is not through, clutch state keeps releasing state.Be through if follow the tracks of threshold value Th1, that is to say " X " " w ", be through then this state and will change to and force down owing to follow the tracks of threshold value Th1.

The clutch pedal position along with identical direction discussed above continue move mobile tracking threshold value Th1 not, until the width " W " of mobile conversion window more than the current location by this tracking threshold value Th1 of direction is depressed along clutch in the clutch pedal position.Should be pointed out that then conversion window will overturn (flip) in order to follow the tracks of the firm release side that is located in the clutch pedal position that is through of threshold value Th1.

Owing to do not have conversion window to be present in the release side of clutch pedal position X0, if therefore motion is continued from position X0 in the clutch pedal position, then do not have state to change and occur.Tracking threshold value Th1 will fall behind a distance " w " and follow it, in order to keep little conversion window in the side of forcing down of clutch pedal position.

State conversion " D " is illustrated in clutch pedal position in the transition zone towards the motion (depressing minimizing) of release position, and it follows motion such as " d " towards depressed state.

In this case, conversion window will be positioned at a side of the release of clutch pedal position Z0.Because it moves towards less release position from more release position, and in this case, tracking threshold value formerly is through, and causes that this state is to force down state.If clutch pedal moves the distance of " Z " from Z0 to Z1 along the clutch release direction, then will there be change of state to occur, because in this case " Z "=" w ", wherein " w " discharging the width of end by the conversion window of following the tracks of threshold value Th1 deckle circle.But, if, that is to say the clutch pedal position above " w ", " Z " increase passes tracking threshold value Th1, then state will change from forcing down to discharging, and conversion window will be positioned at a side of forcing down of clutch pedal position.

The clutch pedal position along with equidirectional discussed above continue move mobile tracking threshold value Th1 not, until the width " w " that moves more than conversion window along the clutch release direction in the clutch pedal position surpasses the current location of following the tracks of threshold value Th1.

Owing to there is not conversion window to be present in the side of forcing down of clutch pedal position Z0, therefore, force down direction from position Z0 along this such as the clutch pedal position and move, will there be change of state to occur.Follow the tracks of threshold value Th1 and will fall behind a distance " w " and follow it, in order to keep little conversion window in a side of the release of clutch pedal position, equal fixed upper limit Lu until follow the tracks of the value of threshold value.Should be understood that this fixed upper limit Lu will be less than impact, because this state has been to force down state in this case.

Thereby, movable tracking threshold value Th1 is arranged to follow the physical location (CP among Fig. 4 and Fig. 5) of clutch pedal 25 when the driver forces down with release the clutch pedal 25, and when little clutch pedal position changes when occuring with the reverse opposite direction of clutch pedal formerly, use this tracking threshold value Th1 to affect the variation of state in the clutch pedal position remains on transition zone.

Be arranged to 5% a small amount of that moves such as total clutch pedal position by the skew that will follow the tracks of threshold value Th1, the smaller variation of clutch pedal position can be used for affecting the clutch pedal position change of state.

Leave when trailing threshold value Th1 when clutch pedal position motion, follow the tracks of threshold value Th1 and follow the fixed range that the clutch pedal position is known as transition deviation " W ".When the clutch pedal position moved more than skew " W " surpass formerly trail threshold value Th1 the time, this trails threshold value Th1 will begin to follow the tracks of the clutch pedal position.This movable threshold value Th1 was limited to remain between lower limit L1 and the upper limit Lu in all time.

Driver for the motor vehicle of control/clutch pedal 25, clutch pedal 25 is the consistent distance (w%) that pedal moves away towards the motion of forcing down (being commonly used to begin engine start by stop-start system), and the actual margin that the clutch pedal that causes depresses is irrelevant with parking owing to the control/pin to clutch pedal 25 of (for example 15 to 25%) in the scope of normal expection.

Therefore, the improvement of the operation of stop-start system can produce by the little value of w% that controlling value skew such as the clutch pedal position of threshold value Th1 and clutch pedal position is trailed in setting, if be through then cause the variation of state.

The value of w% can for example be chosen as 5%, this value is for avoiding by signal noise or enough large by the conversion of moving the mistake that excites by vibration or the pin that switches the casual driver cause, but enough little for the sensation of the demand that the driver is provided engine start.

Should be pointed out that for fear of repeating fast conversion, provide the hysteresis that passes across the border to prevent quick oscillation between state (flip-flopping).That is to say, provide two to trail threshold value rather than one discussed above.

Further improving is to learn adaptively X0 and Z0.This pin that is used for driver when attempting to keep pedal static is along any one direction wriggling (creep).The variation of casual clutch pedal position is called the clutch position wriggling usually.The learn element of utilization take the time as the basis, the state that X0 and Z0 can adapt to help to avoid unnecessary is lentamente changed.By this way, start-stop system can and clearly be distinguished between the driver intention at the pin of fatigue.Expression wish to be pulled away from, to change gear or fully the clearly driver intention that further forces down or release the pedal of engaging clutch will be defined as when the amplitude that in very short predetermined amount of time, detected greater than the motion of w%.

With reference now to Fig. 6,, Fig. 6 illustrates in greater detail six kinds of clutch positions variations and how to arrange and trails threshold value Th1, in order to limit an end of conversion window, trails threshold value Th1 so that be positioned at the end opposite at place, clutch pedal position for arranging.The movement of the clutch pedal position in conversion window will not produce the change of clutch pedal position state and will not move the position of movably trailing threshold value Th1.

Should be understood that all states of determining offer electronic control unit 16 as the output from EC3P16C, are used for the stop-start system of controller motor vehicle 5.

Conversion T1 begins with CP=100% and stops with CP=24%.When the size of CP be lower than corresponding to fixed threshold Th2 70% the time, state changes to forcing down state from depressed state.Because the size of clutch pedal position CP continues to reduce, this state remains the state of forcing down until fixed upper limit Lu is through at 30% place, changes to releasing state and will rest in these releasing state until it reaches the end that the clutch pedal position is its change in location of 24% at this point state.Should be pointed out that in this case conversion window is positioned at the side of forcing down of this clutch pedal position CP=24%, and this trails threshold value Th1 towards the distance of the direction forced down skew 5%, so Th1=29%.

Conversion window always is positioned at and will causes from releasing state to forcing down state or from forcing down state to a side of the clutch pedal position that the state of releasing state changes.

Conversion T2 is that conversion T1 is moved and followed in from 24% to 0% clutch pedal position.In this case, will there be state to change, because this state has been that releasing state and clutch pedal position are towards the position movement that discharges fully.Conversion window will towards the location following clutch pedal position that discharges, still because this trails the side of forcing down that threshold value Th1 is positioned at the clutch pedal position, therefore not have state to change threshold value and be through.

Conversion T3 is that conversion T1 is moved and followed in from 24% to 100% clutch pedal position.

Amplitude increase along with the clutch pedal position does not have state to change, until the clutch pedal position is greater than the position of trailing threshold value Th1.That is to say, when CP state greater than 29% time in clutch pedal position will change to the state of forcing down from releasing state.Along with the amplitude continuation increase of clutch pedal position CP, this state forces down state with maintenance until fixed threshold Th2 is through 70%.Being higher than 70% this state will change to depressed state and keep this state until the clutch pedal position reaches 100%.

Conversion T4 begins with CP=0% and stops with CP=24%.In case pass fixedly lower limit 10%, state just changes to the state of forcing down and will remain on the state of forcing down until the clutch pedal position reaches 24% from releasing state.Because the clutch pedal position moves towards depressed state from releasing state, this conversion window be positioned at clutch pedal position CP release a side and trail threshold value Th1 from the clutch pedal position towards releasing state skew 5%.Although therefore the clutch pedal position is identical with conversion T1, the position of conversion window is on the relative side of clutch pedal position CP.

Conversion T5 is from 24% to 0%, and follows T4.

The clutch pedal position state is initially forced down after conversion T4, and is different from the result of the T1 to 24% that produces releasing state.

Along with the amplitude of clutch pedal position reduces, this state keeps identical state to reach 19% until trail threshold value Th1.Just be through this state and just change to releasing state and will rest on this identical state when trailing threshold value Th1, until the clutch pedal position reaches 0%, clutch pedal 25 force down the position fully.

When drop under the clutch pedal position be lower than current when trailing threshold value Th1, it will cause trails the side of forcing down that threshold value Th1 is turned to this clutch pedal position, and in the clutch pedal position mobile more than 5% by trailing after the threshold value Th1 of formerly arranging, this trails threshold value will fall behind 5% tracking clutch pedal position CP, reach lower limit L1 until trail threshold value Th1.

Conversion T6 follows conversion T4.

This initial conversion is to force down state and keep this state until fixed threshold Th2 is through 70%, afterwards, it arrives depressed state and remains on this depressed state owing to clutch pedal is further depressed the complete depressing position with 100% amplitude.Should be pointed out that it can not be through owing to trail the side that threshold value Th1 is positioned at the release of clutch pedal position.But when the amplitude of clutch pedal position increases from 24%, trail that threshold value Th1 will follow until it reaches the predetermined value of 30% maximum when reaching fixed upper limit Lu.

The position of conversion window and the position of therefore trailing threshold value Th1 are always in this side of clutch pedal position, if trail that threshold value Th1 is through and the clutch pedal position in transition zone, to produce from forcing down state to the variation of the state of releasing state, or vice versa.

With reference now to Fig. 4,, Fig. 4 illustrates for the first embodiment who utilizes dynamic clutch function generation according to the present invention from the control output intent of EC3P16C.

The upper limit Lu that the method briefly is included in its prespecified range initially arranges movable threshold value Th1.Then repeatedly carry out this function, and in each execution, the new position (Thresh_tmp) of movable threshold value is calculated to be constant offset, this constant offset is the current location (CP) 5% of leaving clutch pedal in this case.If near clutch pedal position (CP), then this new position is taken as to be discharged into and forces down threshold position (Th1) in the new position (Thresh_tmp) of calculating, otherwise the value of threshold value Th1 formerly is retained.Which kind of situation no matter, the value of threshold value Th1 is limited at upper limit Lu and lower limit L1, and upper and lower bound is respectively 30% and 10% in this case.

In detail, the method is not moved at step 100 motor vehicle 5 in step 100 beginning, then in step 105, key connection event occurs, and connects electric power for motor vehicle systems, especially is that electronic control unit 16, clutch pedal sensor 26 and EC3P16C connect electric power.

Then in step 110, by being set, Th1 equals fixed upper limit Lu, and namely 30%, EC3P16C is initialised, and this before the method can suitably begin, has fully depressed to realize by guaranteeing clutch pedal 25 usually.That is to say, in fact there is another step 107(not shown), in this step, whether the method test clutch pedal 25 is fully depressed, if and do not depress fully, the method turns back to step 105, and if depressed fully, the method advances to step 110 in the situation that threshold value setting is Lu trailing.After step 110, the method advances to determination step 115.

At determination step 115, current clutch pedal position (CP) and movable threshold value Th1 compare.If the amplitude of CP is equal to or greater than Th1, then the result advances to step 120, and if the amplitude of CP less than Th1, the result advances to step 130.

At first process CP more than or equal to the situation of movable threshold value Th1, the method continues in step 120, and CP and Th2 for the low threshold value of depressing the district are compared.If CP is more than or equal to Th2, this state being decided to be in step 124 " depressed " and corresponding control output is provided for electronic control unit 16, if and CP is less than Th2, this state is confirmed as " forcing down " in step 122, and corresponding control output is provided for electronic control unit 16.。The character of control output will be decided by the specific design of EC3P16C, but can for example be the 2 bits output with following sign (designation): the clutch pedal position state that [00] expression discharges; [01] the clutch position state that forces down of expression; [11] the clutch pedal position state depressed of expression.

Then the method proceeds to step 125 from

step

122 and 124, and in step 125, interim threshold value Thresh_tmp is arranged to equal CP and subtracts this transition deviation (w%).

Then method advances to step 126, compare with the value of following the tracks of threshold value Th1 at this interim threshold value Thresh_tmp of step 126, if and the value of Thresh_tmp is greater than Th1, the method advances to step 128, be arranged to Thresh_tmp at 128, Th1, and if Thresh_tmp be not more than Th1, then in step 127, Th1 remains unchanged.

Turn back to step 130, be confirmed as " releasing state " and control accordingly output offering electronic control unit 16 from CE3P16C at 130 these states, the method advances to 132 from 130.

In step 132, interim threshold value Thresh_tmp is arranged to equal CP and adds this transition deviation (w%).

The method advances to step 134, compare with the currency of following the tracks of threshold value Th1 at 134 these interim threshold value Thresh_tmp, if and the value of Thresh_tmp is less than Th1, the method advances to step 138, be arranged to Thresh_tmp at 138, Th1, and if Thresh_tmp be not less than Th1, then in step 136, Th1 remains unchanged.

From step 127,128, any one continuation of 136 and 138, the method advances to step 140, guarantees that in 140 the method value from the treatment step 127 of front or 128 or 136 or 138 Th1 that produce is respectively in upper limit Lu and lower limit L1.That is to say, if Th1 greater than Lu, its value is reduced to and equals Lu, and if the value of same Th1 less than L1, its value is increased to and equals L1.

Whether then the method advances to step 150 from step 140, still exist at 150 the method test " key connection " state.Still exist expression electric power to continue to keep connecting such as " key on-state ", then method turns back to step 115, and repeating step 115 to 150, otherwise the method finishes in step 160.As long as electric power continues to keep connecting, each carries out respectively 20 to 50 milliseconds the method step 115 to 150.

The conversion statement that many examples of the method operating procedure shown in Fig. 1 provide according to Fig. 6 below.

The conversion T1 of CP from 100% to 24%

Wherein:

CP*=100%CP* is the clutch pedal position value of calculating institute's foundation.In this case, the clutch pedal position value has 100 amplitude.

Th1=30%(is because restriction (clipping) step 140, and Th1 can not be greater than 30%).

Th2=70% L1=10% Lu=30%

Skew " w "=5%

Step number	Test or action	The result
			115	100≥30	"Yes" proceeds to 120
120	100≥70	"Yes" proceeds to 124
			124	State=D	Output state is depressed
125	100-5	Thresh_tmp=95
			126	95>30	"Yes" proceeds to 128
128	Th1=95 is set	Th1=95
			140	Restricted T h1	Th1=30

The conversion T1 of CP from 100% to 50%

Wherein:

CP*=50%

Th1=30% (because conditioning step 140, Th1 can not greater than 30%)

Th2=70% Ll=10% Lu=30%

Skew " W "=5%

Step number	Test or action	The result
			115	50≥30	"Yes" proceeds to 120

120	50≥70	"No" proceeds to 122
			122	State=P	Output state forces down
125	50-5	Thresh_tmp=45
			126	45>30	"Yes" proceeds to 128
128	Th1=45 is set	Th1=45
			140	Restricted T h1	Th1=30

The conversion T1 of the amplitude of CP from 50% to 24%

Wherein:

CP*=24%

Th1=30%(is because conditioning step 140, and Th1 can not be greater than 30%)

Th2=70% Ll=10% Lu=30%

Skew " W "=5%

Step number	Test or action	The result
			115	24≥30	"No" proceeds to 130
130	State=R	Output state discharges
			132	24+5	Thresh_tmp=29
134	29<30	"Yes" proceeds to 138
			138	Th1=29 is set	Th1=29

Therefore, at the end of conversion T1, clutch state is releasing state, and the clutch pedal position is 24%, and conversion window is positioned at a side of forcing down of this clutch pedal position, trails threshold value Th1 and is positioned at distance with this clutch pedal position 5%.

The conversion T2 of CP from 24% to 20%

Wherein:

CP*=20%

Th1=29% Th2=70% Ll=10%

Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	20≥29	"No" proceeds to 130
130	State=R	Output state discharges (being releasing state)
			132	20+5	Thresh_tmp=25
134	25<29	"Yes" proceeds to 138
			138	Th1=25 is set	Th1=25

Therefore do not have state to change, but follow the tracks of that threshold value is followed the clutch pedal position in order in the situation of a side of forcing down of clutch pedal position, keep 5% skew at conversion window.

The conversion T2 of CP from 20% to 0%

Wherein

CP*=0% Th1=25% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	0≥25	"No" proceeds to 130
130	State=R	Output state discharges
			132	0+5	Thresh_tmp=5
134	5<25	"Yes" proceeds to 138
			138	Th1=5 is set	Th1=5
140	Restricted T h1	Th1=10

Therefore, do not have change of state and follow the tracks of threshold value Th1 to be prevented from dropping to being lower than 10%, conversion window remains on a side of forcing down of clutch pedal position, but because the restriction of conditioning step 140 is positioned at 10% distance in this case.

The conversion T3 of CP from 24% to 28%

Wherein:

CP*=28% Th1=29% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	28≥29	"No" proceeds to 130
130	State=R	Output state discharges
			132	28+5	Thresh_tmp=33
134	33<29	"No" proceeds to 136
			136	Th1=Th1 is set	Th1=29

Therefore not having change of state and following the tracks of threshold value Th1 does not have to move, but is positioned in this case 1% distance.

The conversion T3 of CP from 28% to 29.5%

Wherein:

CP*=29.5% Th1=29% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	29.5≥29	"Yes" proceeds to 120
120	29.5≥70	"No" proceeds to 122
			122	State=P	Output state forces down

125	29.5-5	Thresh_tmp=24.5
			126	24.5>29	"No" proceeds to 127
127	Th1=Th1 is set	Th1=29

State has changed and has followed the tracks of threshold value Th1 and kept identical.Conversion window has forwarded a side of the release of clutch pedal position to from a rollover of forcing down of clutch pedal position, therefore follow the tracks of this side that threshold value remains on the clutch pedal position, if wherein it is through the generation change of state.

Should be understood that in this case, follow the tracks of threshold value and be positioned at 0.5% distance.In practice, be positioned at when the clutch pedal position after being through such as during 3% tracking threshold value, utilize the hysteresis band to prevent vibrate (flip-flopping) following the tracks of threshold value.

CP proceeds to 50% conversion T3 from 29.5%

Wherein:

CP*=50% Th1=29% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	50≥29	"Yes" proceeds to 120
120	50≥70	"No" proceeds to 122
			122	State=P	The state of illustrating forces down
125	50-5	Thresh_tmp=45
			126	45>29	"Yes" proceeds to 128
128	Th1=45 is set	Th1=45
			140	Restricted T h1	Th1=30

Do not have change of state and follow the tracks of threshold value Th1 to be limited in 30.Conversion window remains on release one side of clutch pedal position, therefore follows the tracks of this side that threshold value remains on the clutch pedal position, if wherein the tracking threshold value is through then change of state will occur.

The conversion T3 of CP from 50% to 100%

Wherein:

CP*=100% Th1=30% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

State is depressed from forcing down to change to, because fixedly upper threshold value Th2 has been through and has followed the tracks of threshold value and has been restricted to 30.Conversion window remains on this side of clutch pedal position, and wherein being through then such as conversion window, the generation state changes.

The conversion T4 of CP from 0% to 14%

Wherein:

CP*=14% Th1=10% (because restriction)

Th2=70% Ll=10% Lu=30%

Skew " w "=5%

Step number

Test or action

The result

115	14≥10	"Yes" proceeds to 120
			120	14≥70	"No" proceeds to 122
122	State=P	Output state forces down
			125	14-5	Thresh_tmp=9
126	9>10	"No" proceeds to 127
			127	Th1=Th1 is set	Th1=10

State has changed to from release and has forced down, and remains on 10 because lower limit L1 has been through and has followed the tracks of threshold value Th1.Conversion window remains on this side of clutch pedal position, and wherein being through change of state such as conversion window will occur, and still compares with its original position and overturns, and it is positioned at a side of the release of clutch pedal position now.

The conversion T4 of CP from 14% to 18%

Wherein:

CP*=18% Th1=10% (because restriction)

Th2=70% Ll=10% Lu=30%

Skew " w "=5%

Step number	Test or action	The result
			115	18≥10	"Yes" proceeds to 120
120	18≥70	"No" proceeds to 122
			122	State=P	Output state forces down
125	18-5	Thresh_tmp=13
			126	13>10	"Yes" proceeds to 128
128	Th1=13 is set	Th1=13

Because clutch position moves away this tracking threshold value Th1, follow the tracks of threshold value and be not through, so the state of clutch pedal keeps forcing down state.Present and the clutch of this threshold value Th1

The device pedal position is spaced apart 5%, and this side in the clutch pedal position is if pass, then

Cause change of state.

The conversion T4 of CP from 18% to 24%

Wherein:

CP*=24% Th1=13% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	24≥13	"Yes" proceeds to 120
120	24≥70	"No" proceeds to 122
			122	State=P	Output state forces down
125	24-5	Thresh_tmp=19
			126	19>13	"Yes" proceeds to 128
128	Th1=19 is set	Th1=19

The state of clutch pedal position remains unchanged and trails threshold value and followed the tracks of the clutch pedal position to keep 5% skew with its.Conversion window is positioned at a side of the release of clutch pedal position.

Should be understood that and trail in this case threshold value is positioned at the release of clutch pedal position in 19% place a side, and for identical position in conversion 1 situation, this trails threshold value is positioned at the clutch pedal position in 29% place a side of forcing down.

The conversion T5 of CP from 24% to 18%

Wherein

CP*=18% Th1=19% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	18≥19	"No" proceeds to 130
130	State=R	Output state discharges
			132	18+5	Thresh_tmp=23
134	23<19	"No" proceeds to 136
			136	Th1=Th1 is set	Th1=19

Be through because trail threshold value Th1, this state changes to releasing state from forcing down state, and the clutch pedal position is not than the current threshold position low no more than 5% of trailing but threshold value is mobile.Should be pointed out that when trailing threshold value Th1 and be through conversion window is positioned at a side of forcing down of the clutch pedal position of having overturn now.Should be understood that in practice to provide the hysteresis band, and the little variation of therefore returning towards the state of forcing down will not cause vibration.

The conversion T5 of CP from 18% to 12%

Wherein:

CP*=12% Th1=19% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	12≥19	"No" proceeds to 130
130	State=R	Output state discharges
			132	12+5	Thresh_tmp=17
134	17<19	"Yes" proceeds to 138
			138	Th1=17 is set	Th1=17

The side of forcing down that change of state and conversion window remain on the clutch pedal position does not occur, but trail threshold value begun to follow the tracks of the clutch pedal position in case lag behind it 5%.

The conversion T5 of CP from 12% to 0%

Wherein:

CP*=0% Th1=17% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	0≥17	"No" proceeds to 130
130	State=R	Output state discharges
			132	0+5	Thresh_tmp=5
134	5<17	"Yes" proceeds to 138
			138	Th1=5 is set	Th1=5
140	Restricted T h1	Th1=10

The state of clutch pedal position does not change and conversion window remains on a side of forcing down of clutch pedal position, but trailing threshold value is limited to remain on 10%.

The conversion T6 of CP from 24% to 28%

Wherein:

CP*=28% Th1=19% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	28≥19	"Yes" proceeds to 120
120	28≥70	"No" proceeds to 122
			122	State=P	Output state forces down
125	28-5	Thresh_tmp=23
			126	23>19	"Yes" proceeds to 128

128

Th1=23 is set

Th1=23

Not having change of state still to trail threshold value has moved in order to follow the tracks of the clutch pedal position

Put.

From 28% to 50% conversion T6

Wherein:

CP*=50% Th1=23% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Step number	Test or action	The result
			115	50≥23	"Yes" proceeds to 120
120	50≥70	"No" proceeds to 122
			122	State=P	Output state forces down
125	50-5	Thresh_tmp=45
			126	45>23	"Yes" proceeds to 128
128	Th1=45 is set	Th1=45
			140	Restricted T h1	Th1=30

Do not have change of state, conversion window still is positioned at release one side of clutch pedal position, but is fixed in now upper limit Lu because threshold value is trailed in upset.

The conversion T6 of CP from 50% to 100%

Wherein:

CP*=100% Th1=30% Th2=70%

Ll=10% Lu=30% is offset " w "=5%

Trail threshold value Th1 and still be constrained on upper limit Lu by restriction, but since the clutch pedal position pass this fixedly upper threshold value Th2 and stateful change.

According to a second embodiment of the present invention, carrying out circulation at each is that 0.01% minor adjustment (δ) is to remove threshold value from current clutch position (CP) for the position of threshold value (Th1) usually.This interval that increases between movable threshold value Th1 and the current clutch position CP of being intended that is to deviant, if for example driver's pin moves (wriggling) lentamente towards movable threshold value Th1.The variation of casual clutch pedal position is commonly referred to as clutch pedal " wriggling ".It is insignificant moving the effect that the variation that causes compares this adjusting with normal pedal, but prevents because the incorrect change of state that wriggling gradually rather than positive driver intention cause occurs.

Flow chart among Fig. 5 is shown in greater detail in the second embodiment who utilizes the method for dynamic clutch function in the situation that interpolation " wriggling " regulates.

In step 200 beginning, wherein motor vehicle 5 do not move in method, then occur in step 205 key connection event, connect power for motor vehicle systems, are electronic control unit 16, clutch pedal sensor 26 and EC3P16C specifically.

Then in step 210, EC3P16C equals fixed upper limit Lu namely 30% and initialization by Th1 is set, and this is by guaranteeing that before can normally beginning the method clutch pedal 25 depressed to realize fully.That is to say, another step 207(is not shown in addition in practice), in this step, whether the method test clutch pedal 25 is fully depressed, if and do not depress fully, the method turns back to step 205, and if depressed fully, the method advances to step 210 in the situation that threshold value setting is Lu trailing.After step 210, the method advances to determination step 215.

At determination step 215, current clutch pedal position (CP) and movable threshold value Th1 compare.If CP is equal to or greater than Th1, then the result advances to step 220, and if CP less than Th1, the method advances to step 230.

At first process CP more than or equal to the situation of movable threshold value Th1, the method continues in step 220, relatively CP and the Th2 that depresses district's lower threshold value.If CP is more than or equal to Th2, this state is decided to be " depressing " in step 224 and corresponding control output is provided for electronic control unit 16, if and CP is less than Th2, this state is confirmed as " forcing down " in step 222, and corresponding control output is provided for electronic control unit 16.

Then the method proceeds to step 225 from

step

222 and 224, and in step 225, interim threshold value Thresh_tmp is arranged to equal CP and subtracts this transition deviation (W%).

Then method advances to step 227, subtracting wriggling adjusting δ at this interim threshold value Thresh_tmp of step 227 with the currency of following the tracks of threshold value Th1 compares, if and the value of Thresh_tmp subtracts δ greater than Th1, the method advances to step 229, be arranged to Thresh_tmp at 229, Th1, and if be not more than Th1 at step 227Thresh_tmp and subtract δ, then in step 228, Th1 is arranged to Thh1 and subtracts δ.

Turn back to step 230, be confirmed as " release " and control accordingly output offering electronic control unit 16 from CE3P16C at 230 these states, then the method advances to 232 from 230.

In step 232, interim threshold value Thresh_tmp is arranged to equal CP and adds this transition deviation (W%).

The method advances to step 235, adding wriggling adjusting δ at 235 these interim threshold value Thresh_tmp with the currency of following the tracks of threshold value Th1 compares, if and the value of Thresh_tmp adds wriggling adjusting δ less than Th1, the method advances to step 239, is arranged to Thresh_tmp at 239, Th1, if and in step 235, the value of Thresh_tmp is not less than Th1 and adds δ, and then in step 237, Th1 is arranged to Th1 and adds δ.

From step 228,229, any one continuation of 237 and 239, the method advances to step 240, guarantees that in 240 the method value from the treatment step 228 of front or 229 or 237 or 239 Th1 that produce is respectively in upper limit Lu and lower limit L1.That is to say, if Th1 greater than Lu, its value is reduced to and equals Lu, and if the value of same Th1 less than L1, its value is increased to and equals L1.

Whether then the method advances to step 250 from step 240, still exist in 150 the method test key on-states.Still exist expression electric power to continue to keep connecting such as " key connection " state, then method turns back to step 215, and repeating step 215 to 250, otherwise the method finishes in step 260.As long as electric power continues to keep connecting, each carries out respectively 20 to 50 milliseconds the method step 215 to 250.

Being understood that of related domain, although described the present invention with reference to one or more embodiment, but the invention is not restricted to disclosed embodiment, and do not departing from the scope of the present invention interior one or more modification that can construct for disclosed embodiment or optional embodiment.

For example, the jointing state of clutch can directly not inferred from clutch pedal, but inferred from the miscellaneous part of clutch trip lever or clutch release mechanism.

Although the above is about describing the present invention about the simple single value of forcing down and discharge the threshold value between the district, but those skilled in the art is understood that, according to above-mentioned deduction, two values that the single value that is higher than movable threshold value can advantageously be used as lagging behind to work replace.By this way, be discharged into and force down threshold value and discharge threshold value with slightly different with forcing down, and if pedal remain close to movable threshold value, this will prevent the clutch pedal position of indicating discharge and force down between quick variation, or vice versa.

Also have, although describing the present invention with reference to particularly advantageous use of the present invention aspect the stop-start system of motor vehicle, but should be understood that other motor vehicle based on system can require clutch pedal position indication and the present invention can be applied to require any this motor vehicle of clutch pedal position state to use.

Claims

1. method that produces control output from the clutch position detection system, wherein the method comprises: the position of the clutch pedal of monitoring equipment motor vehicle, restriction is by the transition zone of the circumscription of clutch pedal position, forced down by clutch pedal releasing state and clutch pedal that state consists of two kinds alternately a kind of in the state of clutch pedal position in control output described in this transition zone, movable threshold value with the skew of clutch pedal initial position is set, if this movable threshold value is through, then when described clutch pedal position is in described transition zone, to cause the change of clutch pedal position state, if and described movable threshold value is through, then described control output is changed to another kind of alternating state from current state.

2. method according to claim 1, wherein said method also comprises the peak excursion that described movable threshold value and described clutch pedal position are set.

3. method according to claim 1 and 2 is described releasing state if wherein state the state of clutch pedal in place, described clutch pedal initial position, and then the amplitude of described movable threshold value will be greater than the amplitude of described clutch pedal initial position.

4. according to claim 1 to 3 any one described method, if wherein stating the state of clutch pedal in place, described clutch pedal initial position is the described state that forces down, then the amplitude of described movable threshold value will be less than the amplitude of described clutch pedal initial position.

5. according to claim 1 to 4 any one described method, wherein when described clutch pedal position and described movable threshold value are all in described transition zone, the method also comprises if described clutch pedal position moves away described movable threshold value from described clutch pedal initial position, and then mobile described movable threshold value is so that the predetermined migration of maintenance and described clutch pedal position.

6. according to claim 1 to 5 any one described method, if wherein move from the clutch pedal initial position towards described movable threshold value described clutch pedal position, then the amplitude of described movable threshold value keeps identical, until the intended distance that exceeds described movable threshold value has been moved in described clutch pedal position.

7. according to claim 1 to 6 any one described method, the lower end of wherein said transition zone is defined by the clutch pedal position lower limit, and the upper end is defined by the clutch pedal position upper limit.

8. method according to claim 7, discharge wherein that the district is defined by the complete release position of clutch by an end and clutch pedal position circumscription that the upper end is defined by the clutch pedal position lower limit, and when described clutch pedal position is in described release district, the clutch pedal position state that always indication of described control output discharges, and force down that Qu Youyi end is defined by the clutch pedal position upper limit and clutch pedal position circumscription that end opposite is limited by fixing upper threshold value, and whenever described clutch pedal position described when forcing down in the district, the clutch pedal position state that forces down is always indicated in described control output.

9. method according to claim 8, depress wherein that Qu Youyi end is defined by fixing upper threshold value and clutch pedal position circumscription that end opposite is defined by the complete depressing position of clutch pedal, and whenever described clutch pedal position described when depressing in the district, the clutch pedal position state of depressing is always indicated in described control output.

10. according to claim 8 or 9 described methods, the conversion window that the offset qualification of wherein said movable threshold value and described clutch pedal initial position is at one end defined by the position of described movable threshold value and defined by described beginning clutch position in end opposite, and described conversion window always is located at described beginning clutch position towards a side in the clutch position district of another kind of clutch position state.

11. according to the described method of any aforementioned claim, wherein the method also comprises when calculating described movable threshold value, just regulates very little amount of described movable threshold value to allow unintentional clutch pedal position to change.

12. method according to claim 11 is wherein regulated described movable threshold value and is comprised, when calculating described movable threshold value, just increases from described beginning clutch pedal position to the described very little amount of the described skew of described movable threshold value.

13. method according to claim 12, if wherein the amplitude of described movable threshold value is added the currency of described movable threshold value greater than described beginning clutch position to by the amount that this is very little, described skew is increased.

14. method according to claim 12, if wherein the amplitude of described movable threshold value then deducts described very little amount by the currency from described movable threshold value less than described beginning clutch position, described skew is increased.

15. according to claim 11 to 14 any one described method, wherein said very little amount is less than 1% of the value of described skew.

16. according to claim 1 to 15 any one described method, wherein the method also comprises described control output is offered the stop-start system of motor vehicle from described clutch position detection system, is used for controlling the stopping and starting of motor of described motor vehicle.

17. one kind for detection of the clutch pedal position of motor vehicle and the clutch position detection system of control output of the location status of the described clutch pedal of indication is provided, this system comprises the position detecting device and the electric clutch pedal position processor of processing from the described signal of described position detecting device of the signal that the current clutch pedal position of indication is provided, if wherein described clutch pedal position is in the transition zone that the fixed upper limit by the fixedly lower limit of clutch pedal position and clutch pedal position defines, in described transition zone, the state of described clutch pedal position is release and forces down one of them, thereby described electric clutch pedal position processor can move the movable threshold value that arranges with the skew of clutch pedal initial position, if this movable threshold value is through, then when described clutch pedal position is in described transition zone, will cause the change of clutch pedal position state, if and described movable threshold value is through, then with described control output from indicating current clutch pedal position state to change into the another kind of clutch pedal position of indication state.

18. system according to claim 17, if wherein stating clutch pedal in place, described clutch pedal initial position is in the described releasing state, then described electric clutch pedal position processor can move and thereby described movable threshold value is set in order to have amplitude greater than described clutch pedal initial position amplitude, if and state clutch pedal in place, described clutch pedal initial position and be in described forcing down in the state, thereby then described electric clutch pedal position processor can move and described movable threshold value is set in order to have amplitude less than described clutch pedal initial position amplitude.

19. according to claim 17 or 18 described systems, thus wherein said electric clutch pedal position processor can move the peak excursion that described movable threshold value and described clutch pedal position are set.

20. according to claim 17 to 19 any one described system, thereby wherein said electric clutch pedal position processor can also move, when calculating described movable threshold value, regulate very little amount of described movable threshold value, change to allow unintentional clutch pedal position.

21. according to claim 17 to 20 any one described system, thereby wherein said electric clutch pedal position processor can move described control output is supplied to the stop-start system of motor vehicle from described clutch position detection system, is used for controlling the stopping and starting of motor of described motor vehicle.

22. motor vehicle, described motor vehicle have motor, jointing state by the clutch of clutch pedal control, automatically stop and starting the system of described motor according to the change in location of this clutch pedal and according to claim 17 to 21 any one described clutch pedal detection system for detection of described clutch pedal position at least.