CN105972121A - Method for acquiring gear-shifting request of automobile driver and device using the same - Google Patents

Abstract

The invention relates to a method for operating an automobile by an actuator (40) of a clutch (20), torque generated by a motor (10) is transmitted to the clutch through a shaft (21) of the input end of the clutch, wherein when a driver of the automobile has a gear-shifting request, the actuator (40) is operated, so that the maximum torque which can be transmitted by the clutch (20) is changed through an input torque on the shaft (21) applied to the input end of the clutch.

Description

For knowing method and the device for the method for the gearshift request of automobile driver

Technical field

The method that the present invention relates to the actuator of a kind of activatable clutch for manipulating motor vehicles.In addition the present invention relates to a kind of device, especially a kind of control equipment, this control equipment is arranged for performing described method.

Background technology

The method measurable moment transmission of a kind of automatic clutch for knowing motor vehicles is disclosed by unpub document DE 10 2,014 203 958, the most only just disconnecting described automatic clutch only up to a previously given boundary in shift process in the method, when the transmission of measurable moment starts, this boundary is corresponding to the position desired by automatic clutch.

Summary of the invention

Having the advantage that the method for feature described in independent claims 1 possesses is: can reduce the load of actuator and be thus able to spend the less working time.It is possible to realize reducing cost and/or alleviating weight or realize actuator income in terms of kinetics.

The method that can specify that the actuator of a kind of activatable clutch for manipulating motor vehicles in the first aspect.The torque produced by motor is delivered on described clutch by the axle of clutch input, such as bent axle.When automobile driver has gearshift request, then manipulate this actuator such that it is able to change, according to the input torque on the axle being applied to clutch input, the torque that maximum can be transmitted by this clutch.The change hereinafter also referred to torque of the torque that this maximum can be transmitted is followed the trail of or is simply referred as following the trail of.Here, " gearshift request " means the intention of the gearshift for gear, will shift gears i.e. at once.

Followed the trail of by torque and decrease the turn-off time of clutch and gearshift request can be realized rapidly.Certainly when the torque can transmitted maximum carries out this tracking, actuator changes its position state in other words.According to whether have the intention of gearshift to implement described tracking, the load decreased that thereby produce described actuator, that introduced.Especially it can be stated that when identify without gearshift request time or when unidentified go out gearshift request time, do not implement described tracking.

When following the trail of especially it can be stated that maximum transferable torque is to exceed described input torque less than the previously given maximum difference of energy for amplitude, but the transferable torque of described maximum is especially not less than described input torque.

In another aspect it can be stated that identify whether there is gearshift request according to the degrees of actuation of accelerator pedal.

When the temporal change of the degrees of actuation of accelerator pedal unloads threshold value (Entlastungsschwellwert) in other words more than release threshold value, then enable in particular to identify gearshift request.This enables in particular to when negative change, i.e. arranges when unloading accelerator pedal.When performing rapidly described release, i.e. when the absolute value of (bearing) temporal change is more than unloading threshold value, then can particularly simple identify current gearshift request.

In another aspect it can be stated that identify according to the rotating speed of motor, if there is gearshift request.This is also the very simple way for identifying gearshift request.Especially it can be stated that when rotating speed is less than lower rotary speed threshold value, then identify gearshift request.It is very possible for shifting to lower gear in this case.Can also specify, when rotating speed is more than upper rotary speed threshold value, then identify gearshift request.It is very possible for shifting to higher gear in this case.

Gearshift request can be known in another aspect according to the degrees of actuation of gear level.This gearshift request is then able to the first signal of the degrees of actuation according to the gear level characterizing motor vehicles and occurs according to the secondary signal obtained by the filtering to this first signal.Described gear level can be bearing on axle, in order to inserts shift rod shifting block groove when gearshift.When being linked into gear, described axle just rotates.The most described degrees of actuation is such as corresponding to the anglec of rotation of described axle.

This advantage possessed is, knows gearshift request adaptively.Degrees of actuation is known, then the drift of the sensor signal caused owing to the transformable longitudinal dilatation line in other words of parts expands (such as under the influence of temperature) can be compensated by the method if by sensor.Other environmental effects can also be compensated.Know gearshift request the most steadily.Furthermore, it is possible to particularly simple perform the method.

Here, can specify in the very simple design of one, relatively knowing to shift gears and ask according to described first signal and the threshold value that can change, wherein this threshold value that can change is relevant with described secondary signal.It can be stated that when described compare drawn the first signal with described can change threshold value intersect conclusion time, i.e. when the conclusion of the variation of sign of the described difference comparing and having drawn between the first signal and the threshold value that can change, then identifying shift gears asks.

It can be stated that know the described threshold value that can change in the following manner in another very simple improvement project: described secondary signal to be applied one (that be such as multiplied or addition) side-play amount.The most described can the threshold value of change as secondary signal and the summation of side-play amount or can obtain as product.

If the gear being currently linked into of the gear according to motor vehicles selects described side-play amount, then when arranging described shift rod shifting block groove in H-shape, it is possible to particularly simple use the method.

A kind of design of this aspect especially can specify that, when for arrange the gear being currently linked into gear level must the direction of the bigger degrees of actuation of court move time, described side-play amount is positive, and wherein when for arrange the gear being currently linked into gear level must the direction of the lower degrees of actuation of court move time, this side-play amount is negative.

In another aspect it can be stated that implement the filtering of described first signal by means of wave filter, this wave filter has output signal and input signal, and wherein delay and/or storage by this input signal obtain this output signal.Utilize such wave filter can perform the sane method of type described above in a very simplified manner.Such as, described in a kind of particularly simple design, wave filter can be PT1-wave filter.

Computer program, the storage medium of electronics and control equipment is the present invention relates in other respects, wherein said computer program be designed to perform according to one of foregoing aspects of method institute in steps, store computer program on said storage, described control equipment be configured to perform according to one of the method in terms of any one in aforementioned aspect institute in steps.

Accompanying drawing explanation

Accompanying drawing schematically illustrates especially advantageous embodiment of the invention.Wherein:

Fig. 1 shows the topological structure of power assembly system；

Fig. 2 is the flow chart of the first possible method identified for the request of shifting gears；

Fig. 3 is the flow chart of the second possible method identified for the request of shifting gears；

Fig. 4 is the structure chart of the 3rd possible method identified for the request of shifting gears；

Fig. 5 shows the signal curve in the gearshift request according to Fig. 4 identifies；

Fig. 6 is the flow chart of the procedure for opening semi-automatic clutch.

Detailed description of the invention

Fig. 1 shows the topological structure of the power assembly system of motor vehicles 1, can run the method according to the invention in described power assembly system.This motor vehicles 1 has combustion motors 10, and this combustion motors is connected with gear 30 separably by clutch 20.The torque produced by combustion motors 10 is delivered on clutch 10 by bent axle 21.The torque transmitted by this clutch 10 is delivered on gear 30 by the axle 22 of clutch output.Here it is shown that a kind of automanual drive mechanism.Clutch 20 can be activated by clutch actuator 40.Gear 30 is a manual gear.Gear selects to be carried out by gear level 50, this gear level can be moved in shift rod shifting block groove gR, g1, g2, g3, g4, g5, g6 in gearshift tree construction gear-shifting box in other words (Schaltbaum) 51, and these shift rod shifting block grooves correspond respectively to the selection of the gear of gear 30.Shift rod shifting block groove gR corresponds to reverse gear, shift rod shifting block groove g1 corresponds to the first gear, shift rod shifting block groove g2 corresponds to the second gear, shift rod shifting block groove g3 corresponds to third gear position, shift rod shifting block groove g4 corresponds to fourth gear position, and shift rod shifting block groove g5 corresponds to 6th gear corresponding to fifth gear position and shift rod shifting block groove g6.Coupled with gear 30 by the attachment means 60 of machinery to realize the gearshift described gear level of request 50.

Described gear level 50 is bearing on (unshowned) axle in this example.Time within any one described gear level 50 being inserted in shift rod shifting block groove gR, g1, g3, g5 above, the most front described rotation.Time within any one being inserted into by described gear level 50 in following shift rod shifting block groove g2, g4, g6, described axle rotates backward.This axle is mounted with rotation angle sensor 80, in order to know the anglec of rotation of this axle.

Absolute shift sensor 70 can be set with being effectively connected of the attachment means 70 of machinery, in order to be informed in described gear 30 gear being linked into.Subsequently the gear known is conveyed to control equipment 15.This control equipment 15 e.g. motor control apparatus.

Equally, the signal characterizing the angle of rotation of described axle is transferred to control equipment 80 by rotation angle sensor 80.This control equipment 80 can run the method according to the invention.Additionally, the storage medium 16 of electronics can be arranged in control equipment 80, store computer program on the storage medium, and this computer program is so programmed, so that when it runs on described control equipment 80, it performs the method according to the invention.

Additionally, described motor vehicles 1 can also have clutch pedal (not shown), its degrees of actuation can be known by clutch sensor 90 and can be transferred to described control equipment 15.In this case, on the one hand the driver of motor vehicles 1 can be by carrying out cut-off clutch 20 to the manipulation of described clutch pedal.Can also automatically disconnect this clutch 20 but then.

Additionally, described motor vehicles 1 can also have accelerator pedal 94, its degrees of actuation can be accelerated pedal sensor 95 and knows and can be transferred to described control equipment 15.

Fig. 2 schematically illustrates, and how the first aspect that gearshift request identifies can be run.Start described method in step 400.Detect the degrees of actuation of described accelerator pedal 94.Know the absolute value of the temporal rate of change of this degrees of actuation.Carry out step 410, the absolute value of the most described temporal rate of change whether than can be previously given unloading threshold value big.The most then carry out step 420, be determined with gearshift request in this step.Otherwise carry out step 430, judge in this step: utilize that the method is unidentified to be gone out to have gearshift request.

Fig. 3 schematically illustrates how the second aspect of gearshift request identification can be run.Start described method in step 500.Such as known the rotating speed of bent axle 21 by speed probe, the rotating speed of described bent axle is corresponding to the rotating speed of combustion motors 10.Carry out step 510, determine that whether described rotating speed is less than lower rotary speed threshold value in this step.If it is the case, then carry out step 520, it is determined with gearshift request in this step.Otherwise carry out step 530.In this step 530, determine whether described rotating speed is more than rotary speed threshold value.If it is the case, carry out step 520 the most equally.Otherwise carry out step 540, judge in this step unidentified go out following situation: utilize the method unidentified go out have gearshift request.(verzweigen) can certainly not shifted from step 500 and to step 510 but be transferred directly to step 530.Alternatively, it is also possible to be not transfer to step 530 from step 510 but be transferred directly to step 540.

Fig. 4 schematically illustrates how the third aspect of gearshift request identification can be run.The anglec of rotation of axle is transferred to wave filter 100 and is also transmitted to gearshift request recognition unit 150 by described rotation angle sensor 80.The anglec of rotation detected of described axle is also referred to as the first signal in this application.

It is provided with a unit 110, identifies the end of the gearshift request of driver.At the end of described unit 110 have identified the gearshift request of driver, this unit transmits a signal to timer 120.Such as when identify be linked into gear time, it is possible to identify gearshift request end.

Secondary signal is exported to side-play amount signal generating unit 140 by described wave filter 100.This wave filter 100 can be PT1-wave filter, and this PT1 wave filter receives described secondary signal and as input parameter and utilizes the second parameter to export the signal filtered accordingly as output parameter.Here wave filter 100 is PT1-wave filter indecisive.Certainly, PT1-wave filter can particularly simple realize.But can also use other wave filter, as long as this wave filter promotes to receive output signal basically by the delay of input signal.Wave filter 100 also such as is able to be the element of a storage, thus the value inputting parameter is written in FIFO-relief area as time series and this time series exports together as output parameter with time migration.

Certainly can specify, when wave filter 100 have received corresponding signal from timer 120, described wave filter just has the function having been described.Specify in this embodiment, timer 120 persistent period that wait one section can be previously given after gearshift request terminates, and transmit a signal to described wave filter 100 afterwards in this persistent period.Receive described wave filter 100 before this signal export one can be previously given but fixing value.After receiving this signal, this wave filter 100 exports the first signal filtered.This first signal filtered is also referred to as secondary signal in the range of present patent application.

The signal characterizing the gear being currently linked into is transferred to gear recognition unit 130 by shift sensor 70.This gear recognition unit 130 is known the gear being currently linked into from the signal characterizing the gear being currently linked into and is transmitted to described side-play amount signal generating unit 140 and gearshift request recognition unit 150.

Described side-play amount signal generating unit 140 identifies whether in advance to have identified and should implement shift process described in checking.In which case it judges that the second stage implementing to know method for distinguishing for the request of shifting gears, otherwise implement the first stage of the method.

The symbol of described side-play amount is selected according to the gear transmitted.With regard to gear level 50 position corresponding to described axle direct rotational direction those gears for, the symbol selecting this side-play amount be negative, with regard to gear level 50 position corresponding to bear direction of rotation those gears for, select this side-play amount symbol be just.In this example, the direct rotational direction of described axle is corresponding to the first, the 3rd and fifth gear position, and the negative direction of rotation of this axle is corresponding to the second, the 4th and 6th gear, identifying first, the 3rd, fifth gear position time to select described symbol be negative, and identifying second, the 4th, 6th gear time select this symbol for just.

Described side-play amount is such as added to the secondary signal that received by wave filter 100 from side-play amount signal generating unit 140, in order to obtain the threshold value that can change.This threshold value that can change is transmitted to gearshift request recognition unit 150.

The described threshold value that can change is compared by described gearshift request signal generating unit 150 with the first signal.If this gearshift request signal generating unit 150 determines that the first signal intersects with this threshold value that can change, then just identified gearshift request.

Fig. 5 exemplarily shows in the case of first changing to fourth gear position and the shift process that will be manually placed on gear level subsequently that the described gearshift request according to Fig. 4 identifies.Depict time t on the horizontal scale, depict degrees of actuation A of described gear level 50 on the vertical scale.The time graph of first threshold schw1 showing the first signal s and can change, this threshold value is corresponding to positive side-play amount presented hereinbefore.This is the threshold value that can change, and this threshold value that can change is transferred to gearshift request recognition unit 150 in the figure 2 example.

Only having the Second Threshold schw2 that can change of negative side-play amount to illustrate to also illustrate, this Second Threshold is equally learned with first threshold schw1 that can change.This gear it is linked in first time period T1.Degrees of actuation decline the most rapidly, lives through a short minima finally to have the value of near constant in the second time period T2.Owing to the restriction of the smoothness properties of wave filter 100, first threshold schw1 that can change and the Second Threshold schw2 that can change do not demonstrate the characteristic of toning (ü berschwingend).

First the absolute value of side-play amount is chosen as big.Described gearshift request identifies, the first stage presented hereinbefore starts along with the beginning of the second time period T2.Such as utilize ramp function that the absolute value of described side-play amount is reduced to a low value.The band strutted by first threshold schw1 that can change and the Second Threshold schw2 that can change is the narrowest.Because described gear level 50 is in its resting position, so the value of the first signal s is maintained in this band.

Now, in the time period T3 of and then the second time period T2, show what to be there occurs when the driver of motor vehicles 1 is manually placed on gear level 50.Gear level 50 thus changes its degrees of actuation A, and the value of the first signal s such as increases.When first time point t1, the curve of the first signal s is pitched with the curve intersection of first threshold schw1 that can change, and i.e. from the first stage, the value of the first signal s is first more than the value of first threshold schw1 that can change.

Here, described gearshift request recognition unit 150 identifies: gearshift request is identified.

Fig. 6 schematically illustrates the flow process of the method for cut-off clutch 20.Perform the method according to Fig. 2 in step 1010.Step 1040 is sent to by utilizing the method whether to identify gearshift request.

Perform the method according to Fig. 3 the most in step 1020.Step 1040 is sent to by utilizing the method whether to identify gearshift request.

The method according to Fig. 4 is performed concurrently in step 1030.Step 1040 is sent to by utilizing the method whether to identify gearshift request.

It is of course possible to only carry out concurrently in these three method two kinds or only carry out the one in these three method.

These three result is joined logically together with " or (ODER) " and passes the result to step 1050 in step 1040.If at least one in the method being that is performed in parallel has been known gearshift request, then gearshift request will be had to pass to step 1050, otherwise the request of shifting gears will not pass to step 1050.

In step 1050, step 1060 is asked and is transferred to when not shifting gears and asking in check whether there is gearshift, and transfers to step 1070 when there being gearshift request.Terminate the method in step 1060.

Activate torque in process 1070 to follow the trail of.Know the torque being applied on bent axle 21.This is such as realized by combined characteristic, and this combined characteristic is stored in the storage medium 16 of electronics.Described combined characteristic addresses setting position in other words by the running parameter of combustion motors 10 to the torque produced by this combustion motors 10.To be able to be added in the value of torque so known by previously given maximum difference, this has just drawn specified-clutch torque.This specified clutch torque capacities is that clutch 20 should be able to the torque of maximum delivered.Such as being obtained the suitable manipulation for clutch actuator 40 by combined characteristic by the torque known and specified clutch torque capacities, described suitable manipulation is carried out in the following manner: the torque can transmitted by clutch 20 maximum is more than known torque and the most described specified clutch torque capacities.Then, utilize this suitable manipulation to manipulate described clutch actuator 40.It is recycled and reused for the method step of this method that torque is followed the trail of constantly, so that the Assist force that can be transmitted by clutch 20 maximum follows the torque produced by combustion motors 10 in other words.

Carry out step 1080, the most such as by the analysis of the signal transmitted by rotation angle sensor 80 is known whether really to implement gearshift.If identified gearshift request after can be previously given time interval in be not the case, then carry out step 1100.In this step described torque is followed the trail of deactivation and terminates the method.

And if this is contrary with this kind of situation, then carry out step 1090.Break clutch in step 1090, and terminate the tracking of described moment equally.Can check whether during further and be linked into new gear and the most again made this clutch combine.The method is terminated with this.

The most self-evident it is possible to performs introduced method with software, or can perform introduced method with hardware or with the mixed form being made up of hardware and software.

Claims (13)

1. the method being used for manipulating the actuator (40) of the clutch (20) that can activate of motor vehicles (1), the torque produced by motor (10) is passed on described clutch by the axle (21) of clutch input, wherein, when the driver of motor vehicles (1) has gearshift request, manipulate described actuator (40), thus change, according to the input torque on the axle (21) being applied to clutch input, the torque that maximum can be transmitted by described clutch (20).

Method the most according to claim 1, wherein the maximum torque that can transmit is with less than exceeding described input torque for amplitude by previously given maximum difference.

Method the most according to claim 1 and 2, wherein identifies whether there is gearshift request according to the degrees of actuation of accelerator pedal (94).

Method the most according to claim 3, wherein when the temporal change of the degrees of actuation of described accelerator pedal (94) is more than unloading threshold value, then having identified gearshift request.

5., according to the method described in any one in the claims, wherein identify whether there is gearshift request according to the rotating speed of described motor (10).

6. according to the method described in any one in the claims, wherein identify the existence of gearshift request according to the first signal (s) of the degrees of actuation of the gear level (50) characterizing motor vehicles, and identify the existence of gearshift request according to the secondary signal obtained by the filtering to described first signal (s).

Method the most according to claim 6, wherein relatively knowing gearshift request according to described first signal (s) and the threshold value (schw1, schw2, schw3) that can change, the threshold value (schw1, schw2, schw3) that wherein said energy changes is relevant with described secondary signal.

Method the most according to claim 7, knows the described threshold value (schw1, schw2, schw3) that can change: described secondary signal is applied a side-play amount the most in the following manner.

Method the most according to claim 8, wherein selects described side-play amount according to the gear being currently linked into of the gear (30) of motor vehicles (1).

10. according to the method described in any one in claim 6 to 9, wherein filtered by means of wave filter (100), wherein obtained the output signal of this wave filter (100) by the delay of the input signal of described wave filter (100) and/or storage.

11. computer programs, this computer program is arranged for performing the institute of one of method according to any one of claim 1 to 10 in steps.

The storage medium (16) of 12. electronics, stores computer program according to claim 10 on the storage medium of this electronics.

13. control equipment (15), and this control equipment is arranged for performing the institute of one of method according to any one of claim 1 to 10 in steps.