EP3448709A1 - Fahrzeug mit einem automatikgetriebe - Google Patents
Fahrzeug mit einem automatikgetriebeInfo
- Publication number
- EP3448709A1 EP3448709A1 EP17709659.1A EP17709659A EP3448709A1 EP 3448709 A1 EP3448709 A1 EP 3448709A1 EP 17709659 A EP17709659 A EP 17709659A EP 3448709 A1 EP3448709 A1 EP 3448709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- accelerator pedal
- time interval
- feedback
- vehicle
- driver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/24—Providing feel, e.g. to enable selection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H2059/0234—Selectors for gearings using foot control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/24—Providing feel, e.g. to enable selection
- F16H2061/241—Actuators providing feel or simulating a shift gate, i.e. with active force generation for providing counter forces for feed back
Definitions
- the invention relates to a vehicle according to the preamble of
- Claim 1 and a method for operating a vehicle according to claim 9.
- the gearshift takes place as a function of driving parameters, such as the driving speed, the accelerator pedal position and the accelerator pedal gradient. Based on the current driving state detected from the driving parameters, the transmission control device determines a shift recommendation based on which the gear shift takes place.
- driving parameters such as the driving speed, the accelerator pedal position and the accelerator pedal gradient.
- the transmission control device determines a shift recommendation based on which the gear shift takes place.
- a generic vehicle has a drive unit, such as a
- the vehicle has an electronic control device which controls the drive unit in response to a desired torque predefined by the driver by actuating the accelerator pedal.
- the automatic transmission is a
- Gear shifts triggers.
- the gearshifts are made with partially depressed accelerator pedal, in accelerator pedal positions that (in
- kick-down downshift in which in an accelerator pedal in the accelerator pedal Characteristic curve a kick-down pressure point is integrated.
- the kick-down pressure point is positionally fixed (that is, not displaceable via the accelerator pedal travel) integrated in the accelerator pedal characteristic and in the region of the complete
- the starting point of the invention is a special driving situation in which, starting from a constant drive, an acceleration drive is changed.
- the accelerator pedal is stepped with a positive accelerator pedal gradient (ie, toward full
- Automatic transmission for assisting acceleration travel automatic downshifts from a higher gear to a lower gear, for example, in a first gear shift from the eighth gear to the seventh gear and in a second gear shift from the seventh gear to the sixth gear.
- a downshift may not be expedient, for example due to driver-side information about the route or about the traffic situation. It is also possible that the driver wants to avoid a downshift, because due to the
- Powertrain is a time for a circuit execution in the
- Circuit design in automated manual transmissions will give a driver the upcoming circuit design by building a
- the object of the invention is to provide a vehicle and a method for triggering gearshifts in an automatic transmission of a vehicle, in which there are additional degrees of freedom for the driver while driving.
- Gearbox control unit associated with a signal generating unit.
- Signal generating unit for the driver feedback on an imminent release of the gear shift In this way, the driver receives during driving an opportunity to influence whether the gear shift should actually take place or not.
- the invention therefore takes place - in contrast to a kick-down pressure point - a gear shift feedback at partially accelerated accelerator pedal, in an accelerator pedal position which is not fixed in position integrated in the accelerator pedal characteristic, but in dependence on the current driving condition on the available accelerator pedal travel may vary.
- the kick-down pressure point is not variable, but positionally positioned at the end of the accelerator pedal characteristic, ie at almost completely depressed accelerator pedal position and not partially depressed accelerator pedal.
- Gear depressions suppressed that is, the display of such further feedback is omitted according to the invention.
- the suppression may be limited in time for an applicable time (for example, two seconds) for a time interval that starts after the first gear shift is triggered and may be in the range of two seconds, for example. That after the first
- Gear shift occurring time interval can be reset to 0 in order to further increase comfort in the operation of the vehicle and run again from 0, if during the time interval expiration is a driver-induced action, such as the operation of a brake pedal, a steering wheel, the gear selector lever or the accelerator pedal.
- a driver-induced action such as the operation of a brake pedal, a steering wheel, the gear selector lever or the accelerator pedal.
- Such an action can be interpreted as an uninterrupted continuation of the acceleration ride.
- no further feedback about the following gear recesses will be generated if driver actions are present.
- the acceleration drive after the first gear reset can go into a constant drive (or in general: there are no driver actions that cause a load change). In this case, if necessary, the time interval until the end of the time interval expires. If a resumption of acceleration travel takes place after the time interval sequence, then the feedback about an imminent release of the second gear reduction circuit is no longer suppressed but rather generated by the signal generation unit.
- the above signal generating unit is in signal communication with the
- Trigger signal generating unit with a trigger signal to the
- a timer may be connected, which the above trigger signal on the upcoming gearshift.
- the timer can lock a trigger signal on the impending release of the second or subsequent gear downshifts and forward only after the Zeitintervall- sequence to the signal generating unit, if the trigger signal after the time interval sequence still applied to the signal input of the timer.
- the timer can additionally be assigned a reset unit, by means of which the time interval stored in the timer can be reset to 0.
- the reset unit can also be an action caused by the driver
- the reset unit resets the running time interval to 0, so that the time interval starts again from 0.
- Such an action may be, for example, the operation of the accelerator pedal, the brake pedal, the gear selector lever and / or the steering wheel.
- the signal generating unit can in any way a haptic, optical or acoustic feedback on an upcoming event
- the accelerator pedal can be acted upon by a reset active
- the dual-function accelerator pedal may also function as a signal generating unit in which the controller varies an accelerator pedal characteristic that represents the restoring force via the accelerator pedal travel when the gearshift trigger is impending. This means that the feedback is integrated as a haptic perceptible restoring force variation in the accelerator pedal characteristic.
- the impending gearshift triggering can be accomplished, for example, by a return force increase, such as a pressure point, by a return force reduction and / or by a momentary return force vibration.
- the accelerator pedal can preferably be made stronger in a downshift than in upshifts, in which the accelerator pedal is rather less far pushed.
- the invention relates to a driving situation in which
- the driver preferably receives from the accelerator pedal the haptic feedback about the upcoming switch-back trip. In a further impressions of the accelerator pedal, therefore, the driver can
- Deceleration by reducing the positive accelerator pedal gradient that is, by the accelerator pedal, or holds the accelerator pedal in position and not pushed further beyond the pressure point.
- a so-called force-feedback accelerator pedal as is known from DE 10 2008 020 842 A1 by way of example, is suitable for the technical embodiment.
- an accelerator pedal can be adjusted by appropriate control of the control device, the characteristic curve of the accelerator pedal.
- the driver can therefore not only communicate a desired torque specification of the electronic control device.
- the accelerator pedal can also give the driver an immediate impression of whether a gear shift is imminent or not due to a situationally changing restoring force.
- Fig. 2 is a stored in a transmission control unit of an automatic transmission shift map, on the basis of the
- Fig. 3 and 4 respectively accelerator pedal characteristics, in the case of a
- Fig. 1 is made with a view to a simple understanding of the invention. Therefore, Fig. 1 is only a grossly simplified
- the automatic transmission 5 can be for the distribution of the drive torque to the vehicle wheels in driving connection with not shown front and / or rear differential.
- Transmission control unit 16 of the automatic transmission 5 can be controlled by means of an electronic control device 7, which detects a plurality of driving parameters as input variables.
- an electronic control device 7 which detects a plurality of driving parameters as input variables.
- Control device 7 connected to an active accelerator pedal 9.
- the control device 7 is supplied with a driver specification corresponding to a desired torque M SO II.
- Sollmoment specification and the above-mentioned driving parameters controls the control device 7 via dashed lines shown signal lines 1 1, the engine control unit 15 of the internal combustion engine 1 and the
- the accelerator pedal 9 in the present case is a so-called force-feedback pedal whose accelerator pedal characteristic (FIGS. 3 and 4) is dependent on
- control device 7 via the signal line 21 to the accelerator pedal 9 in connection.
- the transmission control unit 16 determines based on the roughly shown in FIG. 2
- the shell diagram shown in FIG. 2 represents the specific one
- Switching characteristics is the shell diagram for comparability simplified for a fixed gear ratio.
- Drive unit can be calculated on the basis of the transmission ratio and the driving speed.
- the ordinate axis can also be the torque of the drive unit or the effective mean pressure of the drive unit.
- the specific fuel consumption is a measure of the efficiency of a
- the control device generates at an impending triggering a gear shift a trigger signal S T , with which the accelerator pedal 9 is controlled to generate a feedback on the upcoming release of a gearshift.
- Signal line 21 is a timer 23 connected, which can delay the transmission of the trigger signal ST limited in time, as will be described later.
- the timer 23 is associated with a reset unit 25, by means of which a timer 23 deposited in the time interval At can be reset to 0.
- the reset unit 25 is the input side in signal communication with a vehicle steering wheel, a brake pedal 27 and the accelerator pedal. 9
- a trigger signal ST is generated in the control device 7, with the over
- the accelerator pedal 9 is controlled to produce as feedback A (Fig. 3), a pressure point in the accelerator pedal characteristic.
- the pressure point A integrated in the accelerator pedal characteristic curve is exceeded, the driver can consciously trigger the upcoming gear shift R8 / 7 or dispense with such a gear shift by releasing the accelerator pedal.
- the timer 23 After triggering the first gear shift 8/7, the timer 23 starts the time interval At, which is in Fig. 1 for example, two seconds. With the help of the timer 23 trigger signals ST on the
- the reset unit 25 detects an action caused by the driver, that is, there is an accelerator pedal, brake pedal and / or steering wheel operation before. In this case, the reset unit 25 resets the elapsed time interval ⁇ t to 0, so that the time interval ⁇ t starts from 0 again. This case is indicated in FIG. 3, according to which there is no feedback about the upcoming second gear shift R7 / 6.
- the reset unit 25 when transitioning the acceleration drive into the constant drive, the reset unit 25 does not detect any action caused by the driver, that is to say there is no accelerator pedal, brake pedal and / or steering wheel actuation. In this case, the reset unit 25 does not reset the expiring time interval At to 0, so that the time interval At may elapse until the time interval end.
- the trigger signal ST is forwarded via the imminent release of the second gear shift R7 / 6 without delay to the accelerator pedal 9 to generate there the pressure point B shown in FIG. 4 in the accelerator pedal characteristic.
- exemplary switch-back thresholds R8 / 7 and R7 / 6 are indicated, on the basis of which the transmission control unit 16 in an 8-speed automatic transmission
- Gear downshifts makes.
- the downshift thresholds R8 / 7 and R7 / 6 are above the dotted full load characteristic of
- the accelerator pedal characteristic curves of FIGS. 3 and 4 respectively represent the restoring force F via the accelerator pedal travel s.
- the respective accelerator pedal characteristic increases approximately linearly to almost completely compressed
- Accelerator pedal position is a positionally integrated in the characteristic curve integrated kickdown pressure point K, which initiates a kickdown downshift with (almost) completely depressed accelerator pedal 9.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016005121.3A DE102016005121B3 (de) | 2016-04-28 | 2016-04-28 | Fahrzeug mit einem Automatikgetriebe |
| PCT/EP2017/055468 WO2017186389A1 (de) | 2016-04-28 | 2017-03-08 | Fahrzeug mit einem automatikgetriebe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3448709A1 true EP3448709A1 (de) | 2019-03-06 |
Family
ID=58264526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17709659.1A Withdrawn EP3448709A1 (de) | 2016-04-28 | 2017-03-08 | Fahrzeug mit einem automatikgetriebe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3448709A1 (de) |
| DE (1) | DE102016005121B3 (de) |
| WO (1) | WO2017186389A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114426015B (zh) * | 2022-02-28 | 2023-05-26 | 神龙汽车有限公司 | 混合动力汽车换挡控制方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004026407B4 (de) * | 2004-05-29 | 2010-06-24 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Steuerung einer einstellbaren Rückstellkraft auf ein Fahrpedal in einem Fahrzeug |
| DE102008020842A1 (de) * | 2008-04-25 | 2009-10-29 | Bayerische Motoren Werke Aktiengesellschaft | Kraftfahrzeug mit Hybridantrieb |
| DE102010039376A1 (de) * | 2010-08-17 | 2012-02-23 | Zf Friedrichshafen Ag | Verfahren zum Betreiben eines Antriebsstrangs |
| KR20120136922A (ko) * | 2011-06-10 | 2012-12-20 | 현대자동차주식회사 | 악셀페달의 답력을 이용한 자동변속 경보장치 및 이의 제어방법 |
| JP5848634B2 (ja) * | 2012-02-29 | 2016-01-27 | 本田技研工業株式会社 | 車両用アクセルペダル装置 |
-
2016
- 2016-04-28 DE DE102016005121.3A patent/DE102016005121B3/de not_active Expired - Fee Related
-
2017
- 2017-03-08 EP EP17709659.1A patent/EP3448709A1/de not_active Withdrawn
- 2017-03-08 WO PCT/EP2017/055468 patent/WO2017186389A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016005121B3 (de) | 2017-07-20 |
| WO2017186389A1 (de) | 2017-11-02 |
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