CN106218626A - The method of electronic brake system, vehicle and electronic brake - Google Patents
The method of electronic brake system, vehicle and electronic brake Download PDFInfo
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- CN106218626A CN106218626A CN201610619629.3A CN201610619629A CN106218626A CN 106218626 A CN106218626 A CN 106218626A CN 201610619629 A CN201610619629 A CN 201610619629A CN 106218626 A CN106218626 A CN 106218626A
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Classifications
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- Regulating Braking Force (AREA)
Abstract
A kind of method that the invention discloses electronic brake system, vehicle and electronic brake.This electronic brake system includes: the first hardwire interface, is connected with the parking switch of vehicle by the first rigid line, for obtaining the parking hard signal indicating this parking switch whether to be triggered；EBI, is connected with the controller local area network of this vehicle, for obtaining the bus signals of this controller local area network；Controller, for performing electronic brake operation according to this parking hard signal and this bus signal control executor；Executor, for performing the operation of this electronic brake under the control of this controller.The method of the electronic brake system of the present invention, vehicle and electronic brake, it is possible to reduce the operation complexity of vehicle.
Description
Technical Field
The present invention relates to the field of vehicles, and more particularly, to an electronic parking brake system, a vehicle, and a method of electronic parking braking.
Background
The Electronic Parking Brake (EPB) is a technology that integrates a temporary Brake during driving and a long-term Brake after parking, and implements a parking Brake by an electronic control method. The EPB system may automatically apply the parking brake after the engine is shut down; the parking is convenient and reliable, and the accidental release can be prevented; for EPB, the braking force is fixed and can not be different from person to person and have deviation; can be used for braking in emergency.
In the vehicle, there is a P range (parking range) in addition to the EPB. When the shift control handle is placed in the P gear, the parking locking mechanism locks the output shaft of the transmission. The transmission shaft is partially locked in the gearbox in P gear, so that the brake is not stepped on the flat ground at the moment, and the vehicle also has certain braking force. The EPB and P-gear are implemented by different devices, and have complex operation and high hardware cost.
Disclosure of Invention
The invention provides an electronic parking brake system, a vehicle and an electronic parking brake method, which can reduce the operation complexity of the vehicle.
In a first aspect, there is provided an electronic parking brake system including:
the first hard wire interface is connected with a parking switch of the vehicle through a first hard wire and used for acquiring a parking hard wire signal indicating whether the parking switch is triggered;
the bus interface is connected with a controller area network of the vehicle and used for acquiring a bus signal of the controller area network;
the controller is used for controlling the actuator to execute the electronic parking brake operation according to the parking hard wire signal and the bus signal;
and an actuator for performing the electronic parking brake operation under the control of the controller.
In some possible implementations, the electronic parking brake system further includes:
the second hard wire interface is connected with an ignition switch of the vehicle through a second hard wire and used for acquiring an ignition hard wire signal;
the controller is specifically configured to control the actuator to perform the electronic parking brake operation according to the ignition hard wire signal, the parking hard wire signal, and the bus signal.
In some possible implementations, the controller is specifically configured to,
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
and controlling the actuator to perform the electronic parking brake operation.
In some possible implementations, determining that the ignition switch is in the ignition state based on the ignition hard wire signal includes:
and when the parking hard wire signal is consistent with the parking bus signal in the bus signals and both indicate that the parking switch is triggered, determining that the parking switch is in a triggered state.
In some possible implementations, determining that the vehicle is in a stationary state based on the bus signal includes:
when the vehicle speed signal or the motor pulse signal in the bus signal is not invalid, determining that the vehicle is in a static state according to the vehicle speed signal and/or the motor pulse signal; or,
and when the vehicle speed signal and the motor pulse signal in the bus signal are both invalid, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle.
In some possible implementations, the controller is further configured to control the actuator to perform an electronic parking brake release operation based on the ignition hard wire signal and the bus signal.
In some possible implementations, controlling the actuator to perform the electronic parking brake release operation based on the ignition hard wire signal and the bus signal includes:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
and controlling the actuator to execute the electronic parking brake releasing operation.
In some possible implementations, the controller is further configured to,
and when a trailer mode command is received, determining that a brake pedal of the vehicle is in a non-depressed state according to the bus signal, and controlling the actuator to execute an electronic parking brake releasing operation.
In some possible implementations, the controller is further configured to control the actuator to perform the electronic parking brake operation upon receiving a trailer mode cancel command.
In some possible implementations, the electronic parking brake system includes the parking switch.
In a second aspect, a vehicle is provided, comprising:
the electronic parking brake system of the first aspect or any possible implementation manner of the first aspect.
In the vehicle of the invention, a parking gear, such as a P gear, is not set any more, namely, only other non-parking gears are set in a transmission of the vehicle; a parking switch may be provided in the electronic parking brake system, and a user performs a parking brake operation by the electronic parking brake system through an operation of the parking switch. Therefore, the operation of a user is simple, the manufacturing cost of the vehicle is low, and the control of the electronic parking brake system is high in safety and stability and high in reliability.
In a third aspect, a method of electronic parking braking is provided, comprising:
acquiring a parking hard wire signal indicating whether a parking switch of a vehicle is triggered;
acquiring a bus signal of a controller area network of the vehicle;
and carrying out electronic parking brake control according to the parking hard wire signal and the bus signal.
In some possible implementations, the method further includes:
acquiring an ignition hard wire signal of an ignition switch of the vehicle;
according to the parking hard wire signal and the bus signal, electronic parking brake control is carried out, and the method comprises the following steps:
and performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal and the bus signal.
In some possible implementations, performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal, and the bus signal includes:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
the electronic parking brake control is performed.
In some possible implementations, determining that the parking switch is activated based on the parking hard wire signal and the bus signal includes:
and when the parking hard wire signal is consistent with the parking signal in the bus signal and both indicate that the parking switch is triggered, determining that the parking switch is triggered.
In some possible implementations, determining that the vehicle is in a stationary state based on the bus signal includes:
when the vehicle speed signal or the motor pulse signal in the bus signal is not invalid, determining that the vehicle is in a static state according to the vehicle speed signal and/or the motor pulse signal; or,
and when the vehicle speed signal and the motor pulse signal in the bus signal are both invalid, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle.
In some possible implementations, the method further includes:
and performing electronic parking brake release control according to the ignition hard wire signal and the bus signal.
In some possible implementations, performing an electronic parking brake release control based on the ignition hard wire signal and the bus signal includes:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
the electronic parking brake release control is performed.
In some possible implementations, the method further includes:
and when a trailer mode command is received, determining that the brake pedal of the vehicle is not pressed down according to the bus signal, and performing electronic parking brake release control.
In some possible implementations, the method further includes:
and when a command for canceling the trailer mode is received, carrying out electronic parking brake control.
In a fourth aspect, an apparatus for electronic parking brake is provided. The apparatus includes a processor and a memory. The memory is used for storing instructions and the processor is used for executing the instructions. When the processor executes the instructions stored by the memory, the execution causes the processor to perform the method of the third aspect or any possible implementation manner of the third aspect.
In a fifth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for performing the method of the third aspect or any possible implementation manner of the third aspect.
Based on the technical scheme, in the invention, the controller controls the actuator to execute the electronic parking brake operation according to the parking hard wire signal and the bus signal of the controller local area network. That is, the control logic of the EPB system is based on the parking hard wire signal and the bus signal, so that the parking brake operation by the electronic parking brake system can be realized by the user through the operation of the parking switch, and the P range and the related operation to the P range are not required. Therefore, the technical scheme of the invention can reduce the operation complexity of the vehicle.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of an electronic parking brake system according to an embodiment of the present invention.
FIG. 2 is a schematic circuit diagram of a parking switch and gear position of an embodiment of the present invention.
Fig. 3 is a schematic view of an electronic parking brake system according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of a parking procedure according to an embodiment of the present invention.
FIG. 5 is a schematic diagram of a brake release process according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of an electronic parking brake system for trailer control according to an embodiment of the present invention.
Fig. 7 is a schematic flowchart of a method of electronic parking braking according to an embodiment of the present invention.
Fig. 8 is a schematic block diagram of an apparatus of an electronic parking brake according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a schematic view of an electronic parking brake system according to an embodiment of the present invention.
As shown in fig. 1, the electronic parking brake system may include: a first hard-wired interface 110, a bus interface 120, a controller 130, and an actuator 140.
The first hard wire interface 140 is connected to a parking switch of the vehicle through a first hard wire, and is used for acquiring a parking hard wire signal indicating whether the parking switch is triggered.
The bus interface 120 is connected to a Controller Area Network (CAN) of the vehicle, and is configured to obtain a bus signal of the CAN;
the controller is used for controlling the actuator to execute the electronic parking brake operation according to the parking hard wire signal and the bus signal;
and an actuator for performing the electronic parking brake operation under the control of the controller.
In the embodiment of the present invention, a parking switch is provided in the vehicle, and the electronic parking brake system is connected to the parking switch through the first hard wire interface 140, so that a parking hard wire signal can be acquired.
Alternatively, the parking switch may be provided on the electronic parking brake system. That is, the parking switch may be a switch or a button provided on the electronic parking brake system.
The parking switch may replace the P range in the vehicle. That is, the parking brake operation may be performed by the electronic parking brake system by operating the parking switch without providing the P range in the vehicle.
It should be understood that the parking switch may be expressed by other names, such as EPB button, parking switch, P-range switch, etc., and the present invention is not limited to the specific expressions.
For example, in one embodiment, the P range is not set in the transmission of the vehicle, but a parking switch is set on the electronic parking brake system, and when a user wants to park the vehicle, the user only needs to press the parking switch, and the parking hard wire signal is obtained by the electronic parking brake system through the first hard wire interface 140, so that the electronic parking brake system CAN perform EPB control based on the parking hard wire signal and the bus signal of the CAN.
The bus interface 120 is connected to the CAN of the vehicle, and is configured to obtain a bus signal of the CAN.
CAN is a serial communication network that effectively supports distributed control or real-time control. After receiving the information of the sensor responsible for sending data to the control unit in the vehicle, the control unit in the vehicle CAN take corresponding measures through analysis and processing, and sends the information to the CAN. This information is thus transmitted over the CAN and is received by each control unit connected to the CAN, and is stored if it is useful for itself and ignored if it is not useful.
Alternatively, the bus signal of the CAN may include a gear signal, a brake pedal signal, an accelerator pedal signal, a vehicle speed signal, an electrode pulse signal, a door signal, and the like. For example, the signals of the respective gears may be connected to a Vehicle Control Unit (VCU) through respective PIN lines as shown in fig. 2, the VCU being connected to the EPB system via a CAN network, and bus signals of the CAN being supplied to the EPB system through the VCU. Information on the various pedals, vehicle speed, etc. may be broadcast in the CAN network and thus may be retrieved by the EPB system. K1 in fig. 2 denotes a parking switch.
In the embodiment of the invention, the parking signal in the hard wire signal is also transmitted in the CAN network to become the parking signal in the bus signal of the CAN.
It should be appreciated that each of the plurality of bus signals described above may be acquired via a separate bus interface, that is, the electronic parking brake system may include a plurality of bus interfaces (as shown in fig. 3), with one bus signal being acquired via each bus interface.
The controller 130 is configured to control the actuator to perform an electronic parking brake operation according to the parking hard line signal and the bus signal. Accordingly, the actuator 140 serves to perform the electronic parking brake operation under the control of the controller.
In the embodiment of the present invention, the controller 130 controls the actuator to perform the electronic parking brake operation according to the parking hard wire signal and the bus signal of the CAN. That is, the control logic of the EPB system is based on the parking hard wire signal and the bus signal, so that the parking brake operation by the electronic parking brake system can be realized by the user through the operation of the parking switch, and the P range and the related operation to the P range are not required. Therefore, the electronic parking brake system of the embodiment of the invention can reduce the operation complexity of the vehicle.
Optionally, as shown in fig. 3, in another embodiment of the present invention, the electronic parking brake system further includes:
and a second hard-wire interface 150, wherein the second hard-wire interface 150 is connected with an ignition switch of the vehicle through a second hard wire, and is used for acquiring an ignition hard-wire signal.
Specifically, the electronic parking brake system is connected to a hard wire that is connected to a vehicle ignition switch (IGN) in addition to a hard wire that is connected to a parking switch. The electronic parking brake system obtains an ignition hard wire signal through the second hard wire interface 150 to determine whether an ignition switch is turned on.
It should be understood that, in the embodiments of the present invention, "first", "second", and the like are only for distinguishing different reference objects, and do not limit respective reference objects.
In this case, the controller 130 is specifically configured to control the actuator 140 to perform the electronic parking brake operation according to the ignition hard wire signal, the parking hard wire signal, and the bus signal.
The controller 130 performs a judgment based on the ignition hard wire signal, the parking hard wire signal and the bus signal, and performs a corresponding EPB control.
Alternatively, in another embodiment of the present invention, the controller 130 is specifically configured to,
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
and controlling the actuator to perform the electronic parking brake operation.
The embodiment realizes parking by the electronic parking brake system. The controller 130 first determines that the ignition switch is in an ignition state according to the ignition hard wire signal; and determining that the parking switch is triggered according to the parking hard wire signal and the bus signal. Specifically, when the parking hard wire signal and the parking signal in the bus signal are consistent and both indicate that the parking switch is triggered, the parking switch is determined to be triggered. The controller 130 then determines that the vehicle is stationary based on the bus signal. Optionally, when the vehicle speed signal or the motor pulse signal in the bus signal is not failed, determining that the vehicle is in a stationary state according to the vehicle speed signal and/or the motor pulse signal; or when the vehicle speed signal and the motor pulse signal in the bus signal are both failed, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle. The vehicle speed signal and the motor pulse signal in the bus signal are invalid, which means that the vehicle speed signal and the motor pulse signal do not exist in the CAN network. In the case where it is determined that the ignition switch is in the ignition state, the parking switch is activated, and the vehicle is in a stationary state, the controller 130 controls the actuator 140 to perform an electronic parking brake operation, thereby achieving parking.
Fig. 4 is an example of a parking process according to an embodiment of the present invention.
401, it is determined whether the ignition switch is in an ignition state. If the ignition switch is not in the ignition state, ending; if the ignition switch is in the ignition state 402 is executed.
And 402, determining that the parking switch is triggered according to the parking hard wire signal.
When the user activates the parking switch, a generated parking hard wire signal indicating that the parking switch is activated is transmitted to the electronic parking brake system, followed by 403.
And 403, determining whether the parking hard wire signal is consistent with the parking signal in the bus signal of the CAN. And if the parking hard wire signal is consistent with the parking signal in the CAN bus signal, determining that a parking switch is triggered, and executing 404.
404, determining whether the EPB is in a release state and the voltage is normal, if not, ending; if so, 405 is performed.
405, determining whether a vehicle speed signal and a motor pulse signal in the CAN bus signal are both invalid, and if not, executing 406; if so, 409 is performed.
And 406, determining whether the vehicle is in a static state according to the vehicle speed signal and the motor pulse signal.
407, determining whether the vehicle is in a static state, and if not, finishing; if so, 408 is performed.
And 408, controlling the EPB clamping operation. I.e. to control the caliper clamping.
409, determining whether the vehicle is in a static state according to the signal of the acceleration sensor in the vehicle.
410, determining whether the vehicle is in a static state, and if not, finishing; if so, 408 is performed.
In the above-described aspect, the latter operation is continued only when it is confirmed that the parking hard wire signal in the hard wire signal coincides with the parking signal transmitted in the CAN network, and it is possible to prevent the emergency braking function of the EPB from being erroneously performed in normal running.
Optionally, in another embodiment of the present invention, the controller 130 is further configured to control the actuator to perform an electronic parking brake release operation according to the ignition hard wire signal and the bus signal.
The embodiment realizes the release of the brake by the electronic parking brake system. Optionally, controlling the actuator to perform an electronic parking brake release operation according to the ignition hard wire signal and the bus signal comprises:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
and controlling the actuator to execute the electronic parking brake releasing operation.
Specifically, the controller 130 first determines that the ignition switch is in the ignition state according to the ignition hard wire signal; then, according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear, such as an R gear (reverse gear), an N gear (neutral gear) or a D gear (forward gear); then, the electronic parking brake release control is performed.
Fig. 5 is an example of a process of releasing the brake according to the embodiment of the present invention.
501, it is determined whether the ignition switch is in an ignition state. If the ignition switch is not in the ignition state, ending; if the ignition switch is in the ignition state 502 is executed.
502, determining that the brake pedal is in a depressed state and the accelerator pedal is in a non-depressed state, 503 is executed.
503, determining that the gear of the vehicle is in the non-parking gear, and executing 504.
504, determining whether the EPB caliper is in a clamping state and the voltage is normal, if not, finishing; if so, 505 is performed.
And 505, carrying out EPB release control.
Alternatively, in another embodiment of the present invention, the controller 130 is configured to control the actuator to perform the trailer operation according to a bus signal of the CAN.
The electronic parking brake system of the embodiment of the invention can also perform trailer control. Specifically, when a trailer mode command is received, the brake pedal of the vehicle is determined to be in a non-depressed state according to the bus signal of the CAN, and the actuator is controlled to execute an EPB release operation: and controlling the actuator to execute the EPB operation when receiving the command of canceling the trailer mode.
Fig. 6 is a schematic diagram of the electronic parking brake system for trailer control according to the embodiment of the present invention. As shown in fig. 6, the EPB system determines BCM ignition by Body Control Module (BCM); due to BCM ignition, a Human Machine Interface (HMI) can be started, which can enter trailer mode; the EPB system receives the trailer mode command through the HMI, and if the EPB judges that the brake pedal is not braked according to the CAN signal from the VCU, the EPB command releases the caliper so that the vehicle CAN be towed.
The EPB can remember the trailer status while being towed to maintain the trailer status.
In the trailer mode (towing mode), the shift to the forward gear is not possible. To cancel the towing mode, the parking switch may be triggered or the "trailer mode" button of the HMI touched again, and the current towing mode is cancelled and the caliper clamped.
The EPB is connected to the HMI on the right side in FIG. 6 means that the EPB can inform the HMI of the current status.
Having described the electronic parking brake system of the embodiment of the present invention in detail, a method of the electronic parking brake of the embodiment of the present invention is described below.
Fig. 7 shows a schematic flowchart of a method of electronic parking braking according to an embodiment of the present invention. The method may be performed by the electronic parking brake system of the embodiment of the present invention described above, and in particular, may be performed by a controller in the electronic parking brake system. As shown in fig. 7, the method includes:
710, acquiring a parking hard wire signal indicating whether a parking switch of the vehicle is triggered;
720, acquiring a bus signal of a controller area network of the vehicle;
and 730, performing electronic parking brake control according to the parking hard wire signal and the bus signal.
In the embodiment of the invention, the electronic parking brake control is carried out according to the parking hard wire signal and the bus signal of the controller area network. That is, the control logic of the EPB system is based on the parking hard wire signal and the bus signal, so that the parking brake operation by the electronic parking brake system can be realized by the user through the operation of the parking switch, and the P range and the related operation to the P range are not required. Therefore, the method for electronic parking brake of the embodiment of the invention can reduce the operation complexity of the vehicle.
Optionally, in another embodiment of the present invention, the method further includes:
acquiring an ignition hard wire signal of an ignition switch of the vehicle;
according to the parking hard wire signal and the bus signal, electronic parking brake control is carried out, and the method comprises the following steps:
and performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal and the bus signal.
Optionally, in another embodiment of the present invention, the performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal and the bus signal includes:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
the electronic parking brake control is performed.
Optionally, in another embodiment of the present invention, determining that the parking switch is activated according to the parking hard wire signal and the bus signal includes:
and when the parking hard wire signal is consistent with the parking signal in the bus signal and both indicate that the parking switch is triggered, determining that the parking switch is triggered.
Optionally, in another embodiment of the present invention, determining that the vehicle is in a stationary state according to the bus signal includes:
and when the vehicle speed signal or the motor pulse signal in the bus signal is not failed, determining that the vehicle is in a static state according to the vehicle speed signal and/or the motor pulse signal.
Optionally, in another embodiment of the present invention, determining that the vehicle is in a stationary state according to the bus signal includes:
and when the vehicle speed signal and the motor pulse signal in the bus signal are both invalid, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle.
Optionally, in another embodiment of the present invention, the method further includes:
and performing electronic parking brake release control according to the ignition hard wire signal and the bus signal.
Optionally, in another embodiment of the present invention, performing an electronic parking brake release control according to the ignition hard wire signal and the bus signal comprises:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
the electronic parking brake release control is performed.
Optionally, in another embodiment of the present invention, the method further includes:
and when a trailer mode command is received, determining that the brake pedal of the vehicle is not pressed down according to the bus signal, and performing electronic parking brake release control.
Optionally, in another embodiment of the present invention, the method further includes:
and when a command for canceling the trailer mode is received, carrying out electronic parking brake control.
It should be understood that, for brevity, detailed description is omitted herein for the corresponding processes in the method for electronic parking brake according to the embodiment of the present invention, which may refer to the functional description of the corresponding components in the electronic parking brake system according to the embodiment of the present invention.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
An embodiment of the present invention further provides a vehicle, including:
the electronic parking brake system of the embodiment of the invention is described above.
Specifically, in the vehicle of the embodiment of the invention, the parking gear, for example, the P gear, is no longer set, that is, only other non-parking gears are set in the transmission of the vehicle; a parking switch may be provided in the electronic parking brake system, and a user performs a parking brake operation by the electronic parking brake system through an operation of the parking switch. Therefore, the operation of a user is simple, the manufacturing cost of the vehicle is low, and the control of the electronic parking brake system is high in safety and stability and high in reliability.
Fig. 8 shows a schematic view of an electronic parking brake apparatus according to an embodiment of the present invention. The device may be provided in an electronic parking brake system, for example, the device may be a controller in the electronic parking brake system.
As shown in fig. 8, the apparatus may include: a processor 810 and a memory 820.
The processor 810 and the memory 820 may be connected to each other by a bus. The bus may be an ISA (Industry standard Architecture) bus, a PCI (Peripheral component interconnect) bus, an EISA (Extended Industry standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc.
The memory 820 is used to store programs. In particular, the program may include program code comprising computer operating instructions. Memory 820 may include both read-only memory and random-access memory, and provides instructions and data to processor 810. The Memory 820 may include a Random-Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
Alternatively, a program implementing the method of electronic parking brake of the embodiment of the present invention described above may be stored in the memory 820.
Processor 810 executes a program stored in memory 820 for performing the method of electronic parking brake of an embodiment of the present invention described above.
Processor 810 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 810. The Processor 810 may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 820, and the processor 810 reads the information in the memory 820 and combines the hardware to complete the steps of the above method.
In particular, processor 810 is configured to:
acquiring a parking hard wire signal indicating whether a parking switch of a vehicle is triggered;
acquiring a bus signal of a controller area network of the vehicle;
and carrying out electronic parking brake control according to the parking hard wire signal and the bus signal.
Optionally, the processor 810 is configured to:
acquiring an ignition hard wire signal of an ignition switch of the vehicle;
and performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal and the bus signal.
Optionally, the processor 810 is configured to:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
the electronic parking brake control is performed.
Optionally, the processor 810 is configured to:
and when the parking hard wire signal is consistent with the parking signal in the bus signal and both indicate that the parking switch is triggered, determining that the parking switch is triggered.
Optionally, the processor 810 is configured to:
when the vehicle speed signal or the motor pulse signal in the bus signal is not invalid, determining that the vehicle is in a static state according to the vehicle speed signal and/or the motor pulse signal; or,
and when the vehicle speed signal and the motor pulse signal in the bus signal are both invalid, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle.
Optionally, processor 810 is configured to perform an electronic parking brake release control based on the ignition hard wire signal and the bus signal.
Optionally, the processor 810 is configured to:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
the electronic parking brake release control is performed.
Optionally, the processor 810 is configured to:
and when a trailer mode command is received, determining that the brake pedal of the vehicle is not pressed down according to the bus signal, and performing electronic parking brake release control.
Optionally, the processor 810 is configured to:
and when a command for canceling the trailer mode is received, carrying out electronic parking brake control.
It should be understood that the specific examples in the embodiments of the present invention are provided only to help those skilled in the art better understand the embodiments of the present invention, and do not limit the scope of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the several embodiments provided in the present application, it should be understood that the disclosed system and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. An electronic parking brake system, comprising:
the parking system comprises a first hard wire interface, a second hard wire interface and a control module, wherein the first hard wire interface is connected with a parking switch of a vehicle through a first hard wire and used for acquiring a parking hard wire signal indicating whether the parking switch is triggered;
the bus interface is connected with a controller area network of the vehicle and used for acquiring a bus signal of the controller area network;
the controller is used for controlling the actuator to execute the electronic parking brake operation according to the parking hard wire signal and the bus signal;
an actuator for performing the electronic parking brake operation under the control of the controller.
2. The electronic parking brake system of claim 1, further comprising:
the second hard wire interface is connected with an ignition switch of the vehicle through a second hard wire and used for acquiring an ignition hard wire signal;
the controller is specifically configured to control the actuator to perform the electronic parking brake operation according to the ignition hard wire signal, the parking hard wire signal, and the bus signal.
3. Electronic parking brake system according to claim 2, wherein the controller is in particular adapted to,
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
and controlling the actuator to execute the electronic parking brake operation.
4. The electronic parking brake system of claim 3, wherein determining that the ignition switch is in an ignition state based on the ignition hard-wire signal comprises:
and when the parking hard wire signal and the parking signal in the bus signal are consistent and both indicate that the parking switch is triggered, determining that the parking switch is triggered.
5. The electronic parking brake system of claim 3 or 4, wherein determining that the vehicle is in a stationary state based on the bus signal comprises:
when a vehicle speed signal or a motor pulse signal in the bus signal is not invalid, determining that the vehicle is in a static state according to the vehicle speed signal and/or the motor pulse signal; or,
and when the vehicle speed signal and the motor pulse signal in the bus signal are both invalid, determining that the vehicle is in a static state according to the signal of an acceleration sensor in the vehicle.
6. The electronic parking brake system of any one of claims 2 to 5, wherein the controller is further configured to control the actuator to perform an electronic parking brake release operation based on the ignition hard wire signal and the bus signal.
7. The electronic parking brake system of claim 6, wherein controlling the actuator to perform an electronic parking brake release operation based on the ignition hard wire signal and the bus signal comprises:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
and controlling the actuator to execute the electronic parking brake releasing operation.
8. The electronic parking brake system according to any one of claims 1 to 7, wherein the controller is further configured to determine that a brake pedal of the vehicle is in a non-depressed state according to the bus signal and control the actuator to perform an electronic parking brake release operation when a trailer mode command is received.
9. The electronic parking brake system of claim 8, wherein the controller is further configured to control the actuator to perform an electronic parking brake operation upon receiving a trailer mode cancellation command.
10. A vehicle, characterized by comprising:
the electronic parking brake system according to any one of claims 1 to 9.
11. A method of electronic parking braking, comprising:
acquiring a parking hard wire signal indicating whether a parking switch of a vehicle is triggered;
acquiring a bus signal of a controller area network of the vehicle;
and carrying out electronic parking brake control according to the parking hard wire signal and the bus signal.
12. The method of claim 11, further comprising:
acquiring an ignition hard wire signal of an ignition switch of the vehicle;
the electronic parking brake control according to the parking hard wire signal and the bus signal comprises the following steps:
and performing the electronic parking brake control according to the ignition hard wire signal, the parking hard wire signal and the bus signal.
13. The method of claim 12, wherein said performing the electronic parking brake control based on the ignition hard-wire signal, the parking hard-wire signal, and the bus signal comprises:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
determining that the parking switch is triggered according to the parking hard wire signal and the bus signal;
determining that the vehicle is in a static state according to the bus signal;
the electronic parking brake control is performed.
14. The method of claim 13, wherein the determining that the parking switch is activated based on the parking hard wire signal and the bus signal comprises:
and when the parking hard wire signal and the parking signal in the bus signal are consistent and both indicate that the parking switch is triggered, determining that the parking switch is triggered.
15. The method according to any one of claims 12 to 14, further comprising:
determining that the ignition switch is in an ignition state according to the ignition hard wire signal;
according to the bus signal, determining that a brake pedal of the vehicle is in a treading state, an accelerator pedal of the vehicle is in a non-treading state, and a gear of the vehicle is shifted to a non-parking gear;
an electronic parking brake release control is performed.
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| CN201610619629.3A CN106218626B (en) | 2016-07-29 | 2016-07-29 | The method of electronic brake system, vehicle and electronic brake |
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| CN201610619629.3A CN106218626B (en) | 2016-07-29 | 2016-07-29 | The method of electronic brake system, vehicle and electronic brake |
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| CN106218626A true CN106218626A (en) | 2016-12-14 |
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