EP4649246A1 - Verfahren zur aktuierung einer parksperre eines fahrzeugs, computerprogramm und computerprogrammprodukt zur durchführung des verfahrens und fahrzeug - Google Patents
Verfahren zur aktuierung einer parksperre eines fahrzeugs, computerprogramm und computerprogrammprodukt zur durchführung des verfahrens und fahrzeugInfo
- Publication number
- EP4649246A1 EP4649246A1 EP24700896.4A EP24700896A EP4649246A1 EP 4649246 A1 EP4649246 A1 EP 4649246A1 EP 24700896 A EP24700896 A EP 24700896A EP 4649246 A1 EP4649246 A1 EP 4649246A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- vehicle speed
- computer program
- determined
- parking lock
- 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.)
- Pending
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
- F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
-
- 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
- F16H59/36—Inputs being a function of speed
- F16H2059/366—Engine or motor speed
Definitions
- the invention relates to a method for activating a parking lock of a vehicle, a computer program and a computer program product for carrying out this method, and a vehicle with such a computer program or computer program product.
- Parking locks are known in which an electrically actuated lever with a so-called ratchet tooth interacts with a gear wheel of a drive train in order to block or lock the drive train.
- the publication DE 102017 102 804 A1 is mentioned, which describes such a parking lock with a ratchet mechanism.
- Such parking locks can be actuated below a definable, critical vehicle speed limit, which is monitored by sensors when the vehicle speed is determined. Wheel speed information is used to determine the vehicle speed and provided to a control unit of the vehicle.
- the object of the present invention is to improve the safety of such parking locks or parking lock systems.
- a method for activating a parking lock of a vehicle is proposed.
- the parking lock is activated when a defined reference speed of the vehicle is undercut by a determined vehicle speed, whereby the vehicle speed is determined by means of a rotor position sensor integrated into the parking lock, which provides periodic voltage signals to determine the vehicle speed within a control unit of the vehicle.
- the proposed method is based on the concept of integrating a rotor position sensor into a parking lock.
- a position sensor arrangement with an inductive signal transmitter and a sensor component that interacts with the signal transmitter and is at least partially made of metal is accommodated in a housing of the parking lock, wherein this position sensor arrangement detects an absolute angular position or angular position of a rotor of an electric motor of an electric motor drive unit for driving a vehicle, which rotor is connected to a shaft.
- the highly accurate vehicle speed determined in this way is used to check the plausibility of vehicle speed control information determined based on other sensor signals, which as such represents primary vehicle speed information for orientation.
- This vehicle speed control information can be determined, for example, from wheel speed sensor signals within a control unit of the vehicle, such as a so-called ESP control unit (Electronic Stability Program) - also called ESC control unit (Electronic Stability Control).
- ESP control unit Electronic Stability Program
- ESC control unit Electric Stability Control
- This is an electronic driver assistance system that is intended to counteract the vehicle's skidding by braking individual wheels. This is also referred to as so-called driving dynamics control. This redundancy supports the release of a drive train lock by the parking lock or secures it (veto option).
- a control unit of an inverter can be provided in the form of a central control unit, in which, among other things, signal processing for the parking lock can also take place, whereby a first vehicle speed information is checked for plausibility with a second vehicle speed information, i.e. the vehicle speed information determined by means of the rotor position sensor integrated in the parking lock, in order to be able to issue an approval for a locking request.
- a second vehicle speed information i.e. the vehicle speed information determined by means of the rotor position sensor integrated in the parking lock
- the highly accurate vehicle speed determined in this way is itself used as vehicle speed control information, against which plausibility can then be checked as such if necessary.
- the highly accurate vehicle speed thus determined is determined within a control unit integrated into the parking lock.
- a vehicle with a computer program or a computer program product of the type described above is proposed.
- a vehicle is understood to mean any type of vehicle or motor vehicle that is powered by an electric motor, but in particular passenger cars and/or commercial vehicles in the form of electric or hybrid vehicles. These can be partially or fully autonomous vehicles.
- a rotor position sensor integrated into a parking lock of an electric motor drive unit for driving a vehicle to actuate the parking lock, wherein a vehicle speed is determined within a control unit of the vehicle on the basis of periodic voltage signals provided by the rotor position sensor in order to release a locking request.
- Fig. 1 an electric or hybrid vehicle with a lockable electric motor drive unit.
- the vehicle 2 illustrated in Fig. 1 comprises an electric motor drive unit 4 with a permanent or separately excited synchronous machine as an electric motor for driving the vehicle, wherein the electric motor can optionally be combined with a reduction gear, a high-voltage battery 8 and an inverter 6, which is included in the power electronics of the vehicle 2 and which establishes the connection between the electric motor of the electric motor drive unit 4 and the high-voltage battery 8.
- the power electronics can optionally comprise an integrated voltage converter 10, which supplies a low-voltage electrical system of the vehicle from the high-voltage electrical system of the vehicle.
- a control unit of the inverter 6 controls, regulates and monitors the electric motor and ensures that the torque supply and speed control of a drive train of the vehicle 2 are as required.
- the inverter 6 converts the direct voltage of the high-voltage battery 8 into the alternating voltage required by the electric motor.
- the power electronics or the inverter 6 included in the power electronics not only supplies the electric motor with electricity, but also the high-voltage battery 8 - namely when the electric motor works as a generator and feeds electricity into the high-voltage battery 8. In this process, known as recuperation, it converts the alternating current generated by the electric motor into direct current and thus charges the high-voltage battery 8.
- a parking lock - also called a locking device - is integrated into the electric motor drive unit 4, in which a rotor position sensor RPS is integrated.
- This rotor position sensor RPS serves on the one hand for efficient commutation of the electric motor and on the other hand for providing periodic, sine-cosine-shaped voltage signals, which are provided to a control unit of the vehicle, such as the control unit of the inverter 6. From these voltage signals, the control unit calculates an absolute angle of a rotor of the electric motor or an exact angular position of the rotor or a rotor shaft as well as its/their exact rotational speed.
- a vehicle speed can be determined with high precision by the control unit.
- the vehicle speed determined in this way can be used to check the plausibility of vehicle speed control information determined based on other sensor signals.
- the vehicle speed determined in this way can be used, for example, in the control unit of the inverter 6 to check the plausibility of this vehicle speed control information and thus to enable a rotor shaft lock. After such a plausibility check, After activation and release, the control unit of the inverter 6 issues a locking command to the parking lock.
- Such redundant determination of the vehicle speed increases the functional security of the parking lock.
- the control unit of the inverter 6 can function as a central control unit for the parking lock.
- the vehicle speed determined in this way can itself be used as vehicle speed guidance information, against which plausibility can be checked if necessary.
- the parking lock itself comprises a control unit in which the said determination of the vehicle speed can be carried out based on the said sine-cosine-shaped voltage signals.
- PCB printed circuit board
- This printed circuit board has control electronics with an integrated signal generator with a coil arrangement, which interacts with a sensor component in the form of a metallic, disk-like element that is fixed to the rotor shaft of the electric motor.
- This metallic element functions as a sensor wheel, which, in conjunction with the signal generator, generates the said sine-cosine-shaped voltage signals.
- the printed circuit board can have a computing or processing unit that determines the said vehicle speed from the sine-cosine-shaped voltage signals.
- the parking lock is actuated to lock or block the drive train when a definable reference speed of the vehicle is undercut by a vehicle speed determined based on the said sine-cosine-shaped voltage signals.
- the control devices described above comprise a digital microprocessor unit (CPU) that is data-connected to a memory system and a bus system, a working memory (RAM) and a storage medium.
- the CPU is designed to process commands that are implemented as a program stored in a memory system, to detect input signals from the data bus and to output output signals to the data bus.
- the memory system can have various storage media in the form of magnetic, solid-state and other non-volatile media on which a corresponding computer program for carrying out the method and the advantageous embodiments is stored.
- the program can be designed in such a way that it embodies or is capable of carrying out the method aspects described here, so that the CPU can carry out the steps of such methods and thus control both the vehicle and the parking lock or locking device.
- Suitable for carrying out the method is a computer program which has program code means for carrying out all the steps of any of the claims or method claims when the program is executed in the CPU.
- the computer program can be easily read into existing control electronics and used to control both the vehicle and the parking lock or locking device.
- a computer program product is provided with program code means stored on a computer-readable data carrier for carrying out the method according to any one of the claims, when the computer Program product is executed in the CPU.
- the computer program product can also be integrated into the control electronics as a retrofit option.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023200224.8A DE102023200224B4 (de) | 2023-01-12 | 2023-01-12 | Verfahren zur Aktuierung einer Parksperre eines Fahrzeugs, Computerprogramm und Computerprogrammprodukt zur Durchführung des Verfahrens und Fahrzeug |
| PCT/EP2024/050575 WO2024149835A1 (de) | 2023-01-12 | 2024-01-11 | Verfahren zur aktuierung einer parksperre eines fahrzeugs, computerprogramm und computerprogrammprodukt zur durchführung des verfahrens und fahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4649246A1 true EP4649246A1 (de) | 2025-11-19 |
Family
ID=89661783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24700896.4A Pending EP4649246A1 (de) | 2023-01-12 | 2024-01-11 | Verfahren zur aktuierung einer parksperre eines fahrzeugs, computerprogramm und computerprogrammprodukt zur durchführung des verfahrens und fahrzeug |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4649246A1 (de) |
| CN (1) | CN120530274A (de) |
| DE (1) | DE102023200224B4 (de) |
| WO (1) | WO2024149835A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017102804B4 (de) | 2017-02-13 | 2019-03-14 | Schaeffler Technologies AG & Co. KG | Vorrichtung zum Betätigen einer Parksperre |
| US11091149B2 (en) * | 2017-11-09 | 2021-08-17 | Robert Bosch Gmbh | Vehicle electronic stability control system including improved wheel speed detection |
| DE102020204296A1 (de) | 2020-04-02 | 2021-10-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben einer Parksperreneinrichtung in einem Fahrzeug und Parksperreneinrichtung für ein Fahrzeug |
| DE102020212578A1 (de) * | 2020-10-06 | 2022-04-07 | Robert Bosch Gesellschaft mit beschränkter Haftung | Parksperreneinrichtung für ein Fahrzeug und Verfahren zum Betreiben einer Parksperreneinrichtung für ein Fahrzeug |
| DE102021125114B3 (de) * | 2021-09-28 | 2022-09-22 | Schaeffler Technologies AG & Co. KG | Elektrischer Achsantriebsstrang, Steuereinheit und Computerprogrammprodukt |
| DE102022207258A1 (de) | 2022-07-15 | 2024-01-18 | Vitesco Technologies GmbH | Sperrvorrichtung, Elektromotor-Antriebseinheit und Fahrzeug |
-
2023
- 2023-01-12 DE DE102023200224.8A patent/DE102023200224B4/de active Active
-
2024
- 2024-01-11 WO PCT/EP2024/050575 patent/WO2024149835A1/de not_active Ceased
- 2024-01-11 EP EP24700896.4A patent/EP4649246A1/de active Pending
- 2024-01-11 CN CN202480007570.5A patent/CN120530274A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024149835A1 (de) | 2024-07-18 |
| DE102023200224A1 (de) | 2024-07-18 |
| CN120530274A (zh) | 2025-08-22 |
| DE102023200224B4 (de) | 2026-06-25 |
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