CN118683494A - Pedal device for drive-by-wire system of vehicle - Google Patents
Pedal device for drive-by-wire system of vehicle Download PDFInfo
- Publication number
- CN118683494A CN118683494A CN202410311737.9A CN202410311737A CN118683494A CN 118683494 A CN118683494 A CN 118683494A CN 202410311737 A CN202410311737 A CN 202410311737A CN 118683494 A CN118683494 A CN 118683494A
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- pedal
- sensor
- elastic
- sensors
- vehicle
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- 238000005259 measurement Methods 0.000 claims abstract description 27
- 238000011156 evaluation Methods 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 13
- 230000005489 elastic deformation Effects 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/02—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for main transmission clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
- B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/30—Controlling members actuated by foot
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Regulating Braking Force (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
Pedal device (10) for a drive-by-wire system of a vehicle (1), having at least one pedal (11), which comprises an interior space (12) surrounded by a housing (14) having an elastic pedal pad (13), wherein at least two sensors (16, 17) are provided, which detect an actuation force (F) currently acting on the elastic pedal pad (13) on the basis of different measurement principles and output corresponding measurement signals to at least one evaluation and control unit (3, 18), wherein a first sensor (16) of the at least two sensors (16, 17) is mechanically connected to the elastic pedal pad (13) and detects an elastic deformation of the pedal pad (13), which elastic deformation is indicative of the actuation force (F) currently acting, and wherein a second sensor (17) of the at least two sensors (16, 17) detects a pressure change in the interior space (12), which is indicative of the actuation force (F) currently acting, without being mechanically connected to the elastic pedal pad (13).
Description
Technical Field
The present invention relates to a pedal device for a drive-by-wire system of a vehicle. The invention also relates to a vehicle having such a pedal device for a drive-by-wire system.
Background
Pedal units for vehicles known from the prior art are generally designed on the basis of travel. In particular in vehicle braking systems, hydraulic pressure is built up in the braking system based on pedal travel and mechanical intervention. This means that a specific pedal travel is assigned a corresponding driver brake request. The pedal travel for establishing pressure, including the additional reserve travel for the standby situation, defines the installation space provided for such pedal units in the vehicle interior.
In addition, so-called Drive-by-Wire systems (Drive-by-Wire systems) are known from the prior art, which merely forward driver commands electrically or electronically. Well-known examples of such drive-by-wire systems are an electronic accelerator pedal for drive control, a brake-by-wire system for brake control, or a steer-by-wire system for steering control. Drive-by-wire refers to driving or controlling a vehicle without mechanical force transmission from an operating component of the vehicle (such as an accelerator pedal, brake pedal, or steering wheel) to a corresponding regulatory component of the vehicle (such as the vehicle's accelerator, brake, and/or steering wheel). This means that in such drive-by-wire systems the corresponding pedal unit is separated from the power flow and the mentioned functions are instead controlled by means of cables and servomotors or electromechanical actuators. Thus, the actuation of the respective pedal unit by the driver can be detected, for example, by a force-sensitive sensor surface and electrically transmitted to the respective vehicle system. By eliminating the mechanical connection, a new pedal concept can be implemented, as pedal travel is no longer required to achieve vehicle deceleration.
A method for operating a brake pedal unit of a vehicle and providing feedback to a driver is known from DE 10 2017 217 578 A1. The brake pedal unit has a large number of pressure-sensitive or force-sensitive sensors. In this method, the output signals of a large number of pressure-sensitive or force-sensitive sensors are detected; determining at least one position and/or orientation of the operator's foot relative to the leg rest member based on the detected output signal; feedback signals indicative of the particular location and/or direction are output at an output unit of the vehicle.
A device for accelerating or decelerating a motor vehicle is known from DE 103 12 547a1, which has two actuating elements, wherein a first actuating element serves to accelerate the motor vehicle and a second actuating element serves to decelerate the motor vehicle, and the actuation thereof takes place by applying a hand or foot force. Here, the two actuating members operate essentially without a stroke and after the hand or foot force has been removed from the first or second actuating member (depending on whether the hand or foot force was last applied), the speed of the motor vehicle remains constant until further actuation of the first or second actuating member is performed.
An actuating mechanism for influencing a device for braking, clutching or driving a motor vehicle is known from DE 102 39 913a 1. The actuation mechanism actuated by the driver is mechanically decoupled from the actuator of the device. For this purpose, the actuating mechanism is a sensor that detects the actuating force of the driver exclusively and generates a control signal that is independent of the actuating travel and has no actuating travel. The actuation mechanism may be configured as a piezoceramic force sensor, strain gauge or a combination thereof. A torque sensor may also be used instead of a force sensor if it is desired to detect rotational forces. The actuation mechanism may be arranged in the foot space of the driver or in the region of the steering wheel. For electro-hydraulic brake devices requiring pedals, the actuating mechanism should be disposed on the foot pedal. The actuating mechanism can also be designed in general redundantly.
Disclosure of Invention
A pedal device for a drive-by-wire system of a vehicle having the features of independent claim 1 has the following advantages: the actuation force applied to the elastic pedal pad is detected by heterogeneous redundant measurements based on different measurement principles. The direct connection of the first sensor to the resilient pedal pad enables a more accurate or stable detection of the currently acting actuation force. Due to the lack of connection to the elastic pedal pad, a pressure change in the inner space of the pedal can be simply detected, so that the reliability of the measurement of the first sensor can be easily checked. Due to the elastic deformation of the elastic pedal pad, the volume of the inner space is compressed, which can be detected as a minute pressure change.
Embodiments of the present invention provide a pedal apparatus for a drive-by-wire system of a vehicle, the pedal apparatus having at least one pedal. The pedal comprises an interior space surrounded by a housing with an elastic pedal pad, in which interior space at least two sensors are arranged, which detect the current actuation force acting on the elastic pedal pad on the basis of different measurement principles and output corresponding measurement signals to at least one evaluation and control unit. In this case, a first sensor of the at least two sensors is mechanically connected to the elastic pedal pad and detects an elastic deformation of the pedal pad, which represents the currently acting actuating force. A second sensor of the at least two sensors detects a pressure change in the interior space without being mechanically connected to the resilient pedal pad, the pressure change being indicative of a currently acting actuation force.
In addition, a vehicle having such a pedal device is proposed.
In the present case, an evaluation and control unit may refer to an electrical device, such as a controller, in particular a brake controller or an engine controller, which processes or evaluates the detected sensor signals. The evaluation and control unit may have at least one interface, which may be designed on the basis of hardware and/or software. In a hardware-based design, these interfaces may be part of, for example, a so-called system ASIC, which contains the various functions of the evaluation and control unit. It is also possible that the interface itself is an integrated circuit or at least partly consists of discrete devices. In a software-based design, the interfaces may be software modules that are present with other software modules, for example, on a microcontroller. A computer program product with a program code which is stored on a machine-readable carrier, such as a semiconductor memory, a hard disk memory or an optical memory, and which is used to carry out the evaluation when the program is executed by the evaluation and control unit is also advantageous.
In the present case, a sensor means a structural unit comprising at least one sensor component which directly or indirectly detects a physical quantity or a change in a physical quantity and preferably converts it into an electrical sensor signal.
The plausibility check (Plausibilisierung) refers to a method in which the result or value of the determined physical quantity is checked to see if it is acceptable and/or reasonable and/or understandable.
Advantageous improvements to the pedal device for a drive-by-wire system of a vehicle, which is given in independent claim 1, are made possible by the measures and further developments outlined in the dependent claims.
It is particularly advantageous if the at least one evaluation and control unit is configured to determine the current actuation force from the at least one first measurement signal of the at least two sensors and to use the at least one second measurement signal of the at least two sensors to check the plausibility of the at least one first measurement signal. Thus, for example, at least one first measurement signal can be output by a first sensor which is mechanically connected to the elastic pedal pad and detects an elastic deformation of the pedal pad. The at least one second measurement signal for checking the plausibility of the first measurement signal can be output, for example, by a second sensor which detects a pressure change in the interior without being mechanically connected to the elastic pedal pad.
In an advantageous embodiment of the pedal device, the first sensor may be configured as a strain sensor with at least one strain gauge, as a pressure sensor with at least one piezo element, or as a linear travel sensor. This enables accurate and stable detection of the elastic deformation of the elastic pedal pad. The second sensor may preferably be configured as a barometric sensor. Thereby, the volumetric compression of the inner space of the pedal based on the elastic deformation of the pedal pad can be detected as a minute change in the inner pressure.
In a further advantageous embodiment of the pedal device, the interior of the at least one pedal can be closed in a fluid-tight manner. For this purpose, the connection of the spring pedal pad to the housing can be closed in a fluid-tight manner, for example, with silicone.
In a further advantageous embodiment of the pedal device, at least one pedal may be a brake pedal for performing a braking function and for actuating a brake system. Alternatively, the at least one pedal may be an accelerator pedal for performing an acceleration function and for operating the drive train. In a vehicle having a manual transmission, at least one pedal may be a clutch pedal for performing a clutch function.
In a further advantageous embodiment of the pedal device, the first evaluation and control unit can be arranged in the interior of the at least one pedal. Additionally or alternatively, the second evaluation and control unit may be arranged outside the at least one pedal.
Drawings
Embodiments of the invention are illustrated in the accompanying drawings and explained in more detail in the following description. In the drawings, the same reference numerals indicate components or parts that perform the same or similar functions.
Fig. 1 shows a schematic view of an embodiment of a pedal device for a drive-by-wire system of a vehicle according to the present invention.
Detailed Description
As shown in fig. 1, the illustrated embodiment of a pedal device 10 for a drive-by-wire system of a vehicle 1 according to the present invention comprises at least one pedal 11 comprising an interior space 12 surrounded by a housing 14 having an elastic pedal pad 13. At least two sensors 16, 17 are arranged in the interior 12, which sensors detect the actuating force F currently acting on the elastic pedal pad 13 on the basis of different measuring principles and output corresponding measuring signals to at least one evaluation and control unit 3, 18. The first sensor 16 of the at least two sensors 16, 17 is mechanically connected to the elastic pedal pad 13 and detects an elastic deformation of the pedal pad 13, which represents the currently acting actuation force F. The second sensor 17 of the at least two sensors 16, 17 detects, without mechanical connection with the elastic pedal pad 13, a pressure change in said inner space 12, which pressure change is indicative of the currently acting actuation force F.
As further shown in fig. 1, the first sensor 16 is configured as a strain sensor 16A with at least one strain gauge, which is directly connected to the resilient pedal pad 13. In fig. 1, the solid line of the pedal pad 13 shows the rest position of the resilient pedal pad 13 in the absence of an applied actuation force F. The dashed line of the pedal pad 13 shows the elastic deformation of the elastic pedal pad 13 in the presence of the actuation force F. The pedal device 10 is preferably arranged in the foot space of the vehicle 1. In the illustrated embodiment, the pedal 11 is configured as a brake pedal 11A for performing a braking function, wherein the actuation force F is applied by the foot of the driver. The brake system of the vehicle 1 is controlled by a brake pedal 11. This means that the measurement signals of the at least two sensors 16, 17 are evaluated by the at least one evaluation and control unit 3, 18 to generate a control signal for the actuators of the brake system.
In addition to the brake pedal 11A, the pedal device 10 further comprises a further pedal 11, not shown, configured as an accelerator pedal, for performing an accelerator function and for actuating the drive train, which is configured similarly to the brake pedal 11 shown, in order to redundantly detect actuation of the pedal 11 configured as an accelerator pedal. In the vehicle 1 having the manual transmission, the pedal device 10 includes a third pedal 11 configured as a clutch pedal for performing a clutch function, which is also configured similarly to the brake pedal 11 shown, so as to redundantly detect actuation of the pedal 11 configured as the clutch pedal.
As further shown in fig. 1, a first evaluation and control unit 18 is arranged on the circuit board 15 in the interior space 12 of the pedal 11 and is electrically coupled with the first sensor 16. The first evaluation and control unit 18 generates, in conjunction with the first sensor 16 configured as a strain sensor 16A, a first measurement signal which represents the current actuation force F and is preferably evaluated to generate a control signal. As further shown in fig. 1, the volume of the interior space 12 of the pedal 11 is compressed due to the elastic deformation of the elastic pedal pad 13. In the exemplary embodiment shown, the second sensor 17 is embodied as a gas pressure sensor 17A and is integrated into an ASIC module (ASIC: application specific integrated circuit). The air pressure sensor 17A detects a pressure change in the inner space 12 of the pedal 11 due to the volume compression of the inner space 12. The ASIC module of the air pressure sensor 17A is also arranged on the circuit board 15 and outputs a second measurement signal of the second sensor 17, which is configured as an air pressure sensor 17A, which is redundant to the currently acting actuation force F and is evaluated to check the plausibility of the first measurement signal. In the event of a failure of the first sensor 16, the second measurement signal of the second sensor 17 can be used to generate a control signal in the emergency operation of the vehicle 1.
In the embodiment shown, the inner space 12 of the at least one pedal 11 is closed in a fluid-tight manner. For this purpose, the connection of the elastic pedal pad 13 to the housing 14 is closed in a fluid-tight manner with silicone. The circuit board 15 is electrically connected to the external second evaluation and control unit 3 arranged outside the interior space 11 via the connection cable 5, the connection cable 5 being led from the interior space 12 of the pedal 11 through the fluid-tight cable sleeve 19. In the illustrated embodiment of the pedal device 10, the second evaluation and control unit 3 is configured as a brake controller for performing a braking function. This means that the second evaluation and control unit 3 receives a first measurement signal from the first evaluation and control unit 18, which represents the currently acting actuation force F detected by the first sensor 16, and generates a steering signal for the brake system actuator on the basis of the currently acting actuation force F. The second evaluation and control unit 3 receives a second measurement signal which is redundant to the currently acting actuating force F from the ASIC module of the second sensor 17 embodied as a pneumatic sensor 17A and evaluates the second measurement signal in order to check the plausibility of the first measurement signal of the first sensor 16 before outputting the actuating signal for the brake system actuator.
In an alternative embodiment of the pedal device 10, not shown, the first sensor 16 is configured as a pressure sensor with at least one piezo element or as a linear travel sensor in order to detect an elastic deformation of the elastic pedal pad 13 by the currently acting actuating force F.
Claims (10)
1. Pedal device (10) for a drive-by-wire system of a vehicle (1), comprising at least one pedal (11) having an interior space (12) surrounded by a housing (14) having an elastic pedal pad (13), in which interior space at least two sensors (16, 17) are provided, which sensors detect an actuation force (F) currently acting on the elastic pedal pad (13) on the basis of different measurement principles and output corresponding measurement signals to at least one evaluation and control unit (3, 18), wherein a first sensor (16) of the at least two sensors (16, 17) is mechanically connected to the elastic pedal pad (13) and detects an elastic deformation of the pedal pad (13), which elastic deformation represents a currently acting actuation force (F), wherein a second sensor (17) of the at least two sensors (16, 17) detects a change in pressure in the interior space (12) without being mechanically connected to the elastic pedal pad (13), which indicates a current change in the force (F).
2. Pedal device (10) according to claim 1, characterized in that the at least one evaluation and control unit (3, 18) determines the current actuation force from at least one first measurement signal of the at least two sensors (16, 17) and verifies the plausibility of the at least one first measurement signal with at least one second measurement signal of the at least two sensors (16, 17).
3. Pedal device (10) according to claim 1 or 2, characterized in that the first sensor (16) is configured as a strain sensor (16A) with at least one strain gauge, or as a pressure sensor with at least one piezo-element, or as a linear travel sensor.
4. A pedal device (10) according to any one of claims 1 to 3, characterized in that the second sensor (17) is configured as a barometric pressure sensor (17A).
5. Pedal device (10) according to any one of claims 1 to 4, characterized in that the inner space (12) of the at least one pedal (11) is closed in a fluid-tight manner.
6. Pedal device (10) according to any one of claims 1 to 5, characterized in that the at least one pedal (11) is a brake pedal for performing a braking function and for operating a brake system, or an accelerator pedal for performing an acceleration function and for operating a drive train, or a clutch pedal for performing a clutch function.
7. Pedal device (10) according to any one of claims 1 to 5, characterized in that a first evaluation and control unit (18) is arranged in the interior space (12) of the at least one pedal (11).
8. Pedal device (10) according to any one of claims 1 to 6, characterized in that the second evaluation and control unit (3) is arranged outside the at least one pedal (11).
9. A vehicle (1) having a pedal device (10) designed according to any one of claims 1 to 8.
10. The vehicle (1) according to claim 9, characterized in that the first pedal (11) is configured as a brake pedal (11A) and the second pedal (11) is configured as an accelerator pedal, wherein the third pedal (11) is configured as a clutch pedal if the vehicle comprises a manual transmission.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023202614.7 | 2023-03-23 | ||
| DE102023202614.7A DE102023202614A1 (en) | 2023-03-23 | 2023-03-23 | Pedal arrangement for a drive-by-wire system of a vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118683494A true CN118683494A (en) | 2024-09-24 |
Family
ID=92634134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410311737.9A Pending CN118683494A (en) | 2023-03-23 | 2024-03-19 | Pedal device for drive-by-wire system of vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN118683494A (en) |
| DE (1) | DE102023202614A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1475290A (en) | 1973-10-09 | 1977-06-01 | Lucas Electrical Ltd | Foot operated controls |
| US4404439A (en) | 1979-03-01 | 1983-09-13 | Leighton John D | Method and construction for vehicle brake pedal and switch assembly |
| DE10239913A1 (en) | 2002-08-30 | 2004-03-18 | Audi Ag | Actuating means for influencing a system for braking, coupling or driving a motor vehicle |
| DE10241365B4 (en) | 2002-09-06 | 2007-03-22 | Bayerische Motoren Werke Ag | Operating device for a motor vehicle |
| DE10312547A1 (en) | 2003-03-21 | 2004-10-14 | Audi Ag | Device for accelerating or decelerating a motor vehicle |
| DE102013106655A1 (en) | 2013-06-25 | 2015-01-08 | Still Gmbh | Mobile working machine with brake actuator |
| JP6572858B2 (en) | 2016-09-28 | 2019-09-11 | 株式会社デンソー | Pedal device |
| DE102017217578A1 (en) | 2017-10-04 | 2019-04-04 | Ford Global Technologies, Llc | A method of operating a brake pedal unit of a vehicle, with feedback to an operator of the brake pedal unit, and brake pedal unit |
-
2023
- 2023-03-23 DE DE102023202614.7A patent/DE102023202614A1/en active Pending
-
2024
- 2024-03-19 CN CN202410311737.9A patent/CN118683494A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023202614A1 (en) | 2024-09-26 |
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