CN113147409A - Electronic parking redundancy control system and method - Google Patents
Electronic parking redundancy control system and method Download PDFInfo
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- CN113147409A CN113147409A CN202110282195.3A CN202110282195A CN113147409A CN 113147409 A CN113147409 A CN 113147409A CN 202110282195 A CN202110282195 A CN 202110282195A CN 113147409 A CN113147409 A CN 113147409A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
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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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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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
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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Abstract
The invention discloses an electronic parking redundancy control system and a method, which relate to the field of electronic parking, and the system comprises a redundancy assembly arranged between an EPB controller and an EPB actuator of a vehicle EPB system, wherein the redundancy assembly comprises a combined relay and a gateway, the upper end of the combined relay is connected with a vehicle storage battery and the EPB controller, and the lower end of the combined relay is connected with the EPB actuator so as to selectively communicate the EPB controller with the EPB actuator or communicate the vehicle storage battery with the EPB actuator; the gateway is connected with the EPB controller, detects the working state of the EPB controller and is connected with the combined relay to realize the control of the combined relay, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly. The invention effectively reduces the manufacturing cost of the vehicle and avoids resource waste.
Description
Technical Field
The invention relates to the field of electronic parking, in particular to an electronic parking redundancy control system and method.
Background
EPB (Electrical Park Brake) is currently in use more and more widely, and an electronic button is used to replace a traditional pull rod hand Brake, and compared with a traditional parking Brake system, the EPB has the following advantages: the functions of automatic parking, automatic release, emergency braking assistance, hill starting assistance and the like can be realized, and the comfort and the convenience of parking and the safety when the vehicle fails are improved; the parking is convenient and reliable, and the accidental release can be prevented; the force of different drivers is different, the traditional parking brake has difference on the actual parking acting force, and the EPB brake force is stable and cannot be different from person to person; the occupied cab space is small.
At present, for EPB redundancy control schemes, a plurality of schemes exist at present, but the schemes basically adopt a mode of adding one controller to realize EPB redundancy backup, the mode of adding the controller is adopted to realize redundancy, the scheme is feasible, for a vehicle enterprise, the manufacturing cost of the vehicle is greatly increased, and meanwhile, as the EPB controller has extremely low failure probability, the mode of additionally adding the controller to realize redundancy also causes resource waste.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an electronic parking redundancy control system and method, which effectively reduce the manufacturing cost of a vehicle and avoid resource waste caused by using high-cost equipment hardware.
In order to achieve the above object, the present invention provides an electronic parking redundancy control system, including a redundancy assembly disposed between an EPB controller and an EPB actuator of an EPB system of a vehicle, the redundancy assembly including:
the upper end of the combined relay is connected with both the vehicle storage battery and the EPB controller, and the lower end of the combined relay is connected with the EPB actuator so as to selectively communicate the EPB controller with the EPB actuator or communicate the vehicle storage battery with the EPB actuator;
the gateway is connected with the EPB controller, detects the working state of the EPB controller and is connected with the combined relay to realize the control of the combined relay, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to communicate the EPB controller with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
On the basis of the technical proposal, the device comprises a shell,
the upper end of the combined relay is connected with a power supply harness of a vehicle storage battery and a power supply harness of the EPB controller;
the lower end of the combined relay is connected with a power supply wiring harness of the EPB actuator.
On the basis of the technical proposal, the device comprises a shell,
the gateway is connected with the EPB controller through a CAN network;
one pin of the gateway is connected with a control pin of the combined relay.
On the basis of the technical proposal, the device comprises a shell,
when the EPB controller works normally, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator;
when the EPB controller fails, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
On the basis of the technical proposal, the device comprises a shell,
when the EPB controller works normally, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator;
when the EPB controller fails, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
On the basis of the technical scheme, when the gateway drives the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and after the electronic calipers of the EPB actuator are clamped, the method further comprises the following steps:
after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator.
On the basis of the technical scheme, when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in the invalid state.
The invention provides an electronic parking redundancy control method which specifically comprises the following steps:
the working state of the EPB controller obtained based on the gateway is as follows:
when the working state of the EPB controller is a normal working state, the gateway drives the combined relay to work so as to communicate the EPB controller with the EPB actuator;
when the working state of the EPB controller is a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped.
On the basis of the technical scheme, when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in the invalid state.
On the basis of the technical scheme, when the gateway drives the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and after the electronic calipers of the EPB actuator are clamped, the method further comprises the following steps:
after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator.
Compared with the prior art, the invention has the advantages that: the redundancy assembly is arranged between the EPB controller and the EPB actuator of the vehicle EPB system, so that the connection between the vehicle storage battery and the EPB actuator is realized, or the EPB controller and the EPB actuator are connected, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to communicate the EPB controller with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly, the redundancy control of the EPB can be realized by only additionally increasing the combined relay, the manufacturing cost of the vehicle is effectively reduced, the resource waste caused by using high-cost equipment hardware is avoided, and the applicability is wide.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 structural diagram of an electronic parking redundancy control system according to an embodiment of the present invention;
fig. 2 is a flowchart of an electronic parking redundancy control method according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an electronic parking redundancy control system, which is characterized in that a redundancy component is arranged between an EPB controller and an EPB actuator of a vehicle EPB system, when the EPB controller is in a normal working state, a gateway drives a combined relay to work so as to communicate the EPB controller with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to communicate a vehicle storage battery with the EPB actuator, and an electronic caliper of the EPB actuator clamps tightly, so that the redundancy control of the EPB can be realized through the combined relay, the manufacturing cost of a vehicle is effectively reduced, and the resource waste caused by using high-cost equipment hardware is avoided. The embodiment of the invention correspondingly provides an electronic parking redundancy control method, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, the electronic calipers of the EPB actuator clamp the EPB, the redundancy control of the EPB can be realized through the combined relay, and the manufacturing cost of the vehicle is effectively reduced.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.
Referring to fig. 1, an electronic parking redundancy control system according to an embodiment of the present invention includes a redundancy component disposed between an EPB controller and an EPB actuator of a vehicle EPB system, where the redundancy component includes a combination relay and a gateway.
The upper end of the combined relay is connected with both the vehicle storage battery and the EPB controller, and the lower end of the combined relay is connected with the EPB actuator, so that the EPB controller and the EPB actuator can be selectively communicated or the vehicle storage battery and the EPB actuator can be selectively communicated. The gateway is connected with the EPB controller, detects the working state of the EPB controller and is connected with the combined relay to realize the control of the combined relay, when the EPB controller is in a normal working state, the gateway orders the combined relay to work so as to communicate the EPB controller with the EPB actuator, when the EPB controller is in a failure state, the gateway orders the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly. The combined relay is equivalent to a selective switch, and under the control of the gateway, certain two ports on the combined relay are selectively communicated, namely when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to enable the EPB controller to be communicated with the EPB actuator, the EPB actuator is controlled by the EPB controller, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, the vehicle storage battery directly supplies power to the EPB actuator, and the electric calipers drive the EPB actuator to clamp.
The redundancy assembly is arranged between the EPB controller and the EPB actuator of the vehicle EPB system, so that the connection between the vehicle storage battery and the EPB actuator is realized, or the EPB controller and the EPB actuator are connected, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to enable the EPB controller to be communicated with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, the electronic calipers of the EPB actuator are clamped, the redundancy control of the EPB can be realized by only additionally increasing the combined relay, and the manufacturing cost of the vehicle is effectively reduced.
For the circuit connection of the electronic parking redundancy control system according to the invention, in particular, the upper end of the combination relay is connected to both the supply line bundle of the vehicle battery and the supply line bundle of the EPB controller, i.e. one of the ports at the upper end of the combination relay is connected to the supply line bundle of the vehicle battery and the other port at the upper end of the combination relay is connected to the supply line bundle of the EPB controller. The lower extreme of combination relay links to each other with the supply pencil of EPB executor, and the EPB executor includes EPB left executor and EPB right executor, and then the lower extreme of combination relay links to each other with the supply pencil of EPB left executor, also links to each other with the supply pencil of EPB right executor simultaneously, and when the EPB controller was failure state, the gateway drove combination relay work so that vehicle battery all communicates with EPB left executor and EPB right executor.
The gateway is connected with the EPB Controller through a CAN (Controller Area Network) Network, so that output signals of the EPB Controller are collected, and a basis is provided for subsequently judging whether the EPB Controller is in a normal working state or not based on the collected signals. One pin of the gateway is connected with a control pin of the combined relay, and the gateway realizes the control of the combined relay in a mode of outputting high and low levels.
In a possible implementation manner, the gateway implements control on the combined relay by outputting high and low levels, which may be: when the EPB controller works normally, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator, namely the EPB controller controls the EPB actuator; when the EPB controller fails, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator clamp, namely the vehicle storage battery directly supplies power to the EPB actuator to drive the electric calipers of the EPB actuator to clamp.
In a possible implementation manner, the gateway implements control on the combined relay by outputting high and low levels, which may be: when the EPB controller works normally, the gateway outputs a low level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator, namely the EPB controller controls the EPB actuator; when the EPB controller fails, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator clamp, namely the vehicle storage battery directly supplies power to the EPB actuator to drive the electric calipers of the EPB actuator to clamp.
For the structure of the electronic parking redundancy control system in the embodiment of the invention, the EPB controller is also connected with the EPB switch, the EPB controller is connected with the EPB switch through a hard wire, and the EPB controller is turned on or off through the EPB switch; meanwhile, the EPB controller is also connected with other controllers, and the EPB controller is connected with the other controllers through a CAN bus.
In the embodiment of the present invention, when the gateway drives the combined relay to operate so as to communicate the vehicle battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped, the method further includes: after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator. Specifically, when the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, the electronic calipers of the EPB actuator are clamped, and after the vehicle storage battery supplies power to the EPB actuator for more than 2 seconds, the gateway drives the combined relay to work so as to disconnect the vehicle storage battery from the EPB actuator, and enable the EPB controller to be communicated with the EPB actuator. The gateway controls the time for clamping the electronic calipers of the EPB actuator, and can be set by referring to the time for controlling the electronic calipers to clamp by the EPB, namely the specific clamping time is calibrated according to the characteristics of hardware equipment, and according to the characteristics of the electric calipers, when the electric calipers are continuously supplied with power for 30s at 14V, the electronic calipers cannot be damaged.
In the embodiment of the invention, for the judgment of the normal working state or the failure state of the EPB controller, when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in the failure state. The method comprises the steps of collecting an output signal of an EPB controller, detecting a vehicle speed signal of a vehicle, detecting the time when a driver steps on a brake pedal, and when a gateway detects that the signal output by the EPB controller is an invalid signal, namely the signal output by the EPB controller cannot control an EPB actuator, the signal is an invalid signal, the detected vehicle speed signal is 0, namely the vehicle is in a static state at the moment, and the time when the driver steps on the brake pedal exceeds a set time, the working state of the EPB controller is judged to be a failure state. When the output signal of the EPB controller is normal, namely the EPB controller can correspond to the corresponding brake operation of the driver and corresponds to the output signal outwards, and the signal can realize the normal control of the EPB actuator, the working state of the EPB controller is judged to be the normal working state. In the embodiment of the invention, the set time can be flexibly calibrated and is generally set to be 10 s.
Through the mode that only increases a set of combination relay, when the EPB parking function of vehicle became invalid, the gateway CAN be according to specific CAN signal, when the signal of EPB controller output was invalid signal, gateway control combination relay, order about combination relay work and make vehicle battery and EPB executor intercommunication, supply power to the EPB executor by the vehicle battery, make the electron calliper of EPB executor press from both sides tightly, realize the parking function that brakes, thereby guarantee that electron calliper is under the condition that the EPB controller became invalid, there is another emergency parking's mode, realize EPB's redundant control, and the CAN signal on the whole car, the gateway homoenergetic detects and obtains, consequently, only need increase certain logic and just CAN reach the redundant demand of EPB emergency parking.
The working principle of the electronic parking redundancy control system provided by the embodiment of the invention is as follows: the power supply wiring harness of the EPB actuator is provided with a combined relay, the upper end of the combined relay is connected with the power supply wiring harness of the vehicle storage battery and the power supply wiring harness of the EPB controller, the lower end of the combined relay is connected with the power supply wiring harness of the EPB actuator, a gateway is connected with the EPB controller through a CAN network, one pin of the gateway is connected with a control pin of the combined relay, when the normal work of the EPB controller is detected, the gateway outputs a set level to the control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator, the EPB actuator is controlled by the EPB controller, when the failure of the EPB controller is detected, the gateway outputs a high (low) level to the control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and an electronic caliper of the EPB actuator is clamped, namely, the vehicle storage battery directly supplies power to the EPB actuator, and driving the electric calipers of the EPB actuator to clamp, and meanwhile, after the clamping time of the electric calipers of the EPB actuator exceeds preset time, driving the combined relay to work by the gateway, disconnecting the vehicle storage battery from the EPB actuator, communicating the EPB controller with the EPB actuator, and continuously controlling the EPB actuator by the EPB controller at the moment.
According to the electronic parking redundancy control system provided by the embodiment of the invention, the redundancy assembly is arranged between the EPB controller and the EPB actuator of the vehicle EPB system, so that the connection between the vehicle storage battery and the EPB actuator is realized, or the connection between the EPB controller and the EPB actuator is realized, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so that the EPB controller is communicated with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped, so that the redundancy control of the EPB can be realized only by additionally increasing the combined relay, the manufacturing cost of the vehicle is effectively reduced, the resource waste caused by using high-cost equipment hardware is avoided, and the applicability is wide.
Referring to fig. 2, an electronic parking redundancy control method provided in an embodiment of the present invention is implemented based on the above-mentioned electronic parking redundancy control system, and specifically includes the following steps:
s1: based on the working state of the EPB controller obtained by the gateway, when the working state of the EPB controller is a normal working state, the operation goes to S2, and when the working state of the EPB controller is a failure state, the operation goes to S3; in the embodiment of the invention, when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in a failure state.
S2: the gateway drives the combined relay to work so as to enable the EPB controller to be communicated with the EPB actuator;
s3: the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, and the electronic calipers of the EPB actuator clamp.
For the circuit connection of the hardware involved in the electronic parking redundancy control method according to the present invention, specifically, the upper end of the combination relay is connected to both the power supply harness of the vehicle battery and the power supply harness of the EPB controller, i.e., one of the ports at the upper end of the combination relay is connected to the power supply harness of the vehicle battery, and the other port at the upper end of the combination relay is connected to the power supply harness of the EPB controller. The lower extreme of combination relay links to each other with the supply pencil of EPB executor, and the EPB executor includes EPB left executor and EPB right executor, and then the lower extreme of combination relay links to each other with the supply pencil of EPB left executor, also links to each other with the supply pencil of EPB right executor simultaneously, and when the EPB controller was failure state, the gateway drove combination relay work so that vehicle battery all communicates with EPB left executor and EPB right executor.
In the embodiment of the present invention, in S3, after the gateway drives the combination relay to operate so as to communicate the vehicle battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped, the method further includes: after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator. Specifically, when the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, the electronic calipers of the EPB actuator are clamped, and after the vehicle storage battery supplies power to the EPB actuator for more than 2 seconds, the gateway drives the combined relay to work so as to disconnect the vehicle storage battery from the EPB actuator, and enable the EPB controller to be communicated with the EPB actuator. The gateway controls the clamping time of the electronic calipers of the EPB actuator, and can be set by referring to the clamping time of the electronic calipers controlled by the EPB, namely the specific clamping time is calibrated according to the characteristics of hardware equipment.
The combined relay in the embodiment of the invention is equivalent to a selective switch, and under the control of the gateway, two ports on the combined relay are selectively communicated, namely when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to enable the EPB controller to be communicated with the EPB actuator, the EPB actuator is controlled by the EPB controller, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, and the vehicle storage battery directly supplies power to the EPB actuator so as to drive the electric calipers of the EPB actuator to clamp.
In the embodiment of the present invention, the gateway implements control on the combined relay by outputting high and low levels, and may be: when the EPB controller works normally, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator, namely the EPB controller controls the EPB actuator; when the EPB controller fails, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator clamp, namely the vehicle storage battery directly supplies power to the EPB actuator to drive the electric calipers of the EPB actuator to clamp.
In the embodiment of the present invention, the gateway implements control on the combined relay by outputting high and low levels, and may be: when the EPB controller works normally, the gateway outputs a low level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator, namely the EPB controller controls the EPB actuator; when the EPB controller fails, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator clamp, namely the vehicle storage battery directly supplies power to the EPB actuator to drive the electric calipers of the EPB actuator to clamp.
For the judgment of the normal working state or the failure state of the EPB controller, in the actual emergency process, when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in the failure state. The method comprises the steps of collecting an output signal of an EPB controller, detecting a vehicle speed signal of a vehicle, detecting the time when a driver steps on a brake pedal, and when a gateway detects that the signal output by the EPB controller is an invalid signal, namely the signal output by the EPB controller cannot control an EPB actuator, the signal is an invalid signal, the detected vehicle speed signal is 0, namely the vehicle is in a static state at the moment, and the time when the driver steps on the brake pedal exceeds a set time, the working state of the EPB controller is judged to be a failure state. When the output signal of the EPB controller is normal, namely the EPB controller can correspond to the corresponding brake operation of the driver and corresponds to the output signal outwards, and the signal can realize the normal control of the EPB actuator, the working state of the EPB controller is judged to be the normal working state. In the embodiment of the invention, the set time can be flexibly calibrated and is generally set to be 10 s.
Through the mode that only increases a set of combination relay, when the EPB parking function of vehicle became invalid, the gateway CAN be according to specific CAN signal, when the signal of EPB controller output was invalid signal, gateway control combination relay, order about combination relay work and make vehicle battery and EPB executor intercommunication, supply power to the EPB executor by the vehicle battery, make the electron calliper of EPB executor press from both sides tightly, realize the parking function that brakes, thereby guarantee that electron calliper is under the condition that the EPB controller became invalid, there is another emergency parking's mode, realize EPB's redundant control, and the CAN signal on the whole car, the gateway homoenergetic detects and obtains, consequently, only need increase certain logic and just CAN reach the redundant demand of EPB emergency parking.
According to the electronic parking redundancy control method, the redundancy assembly is arranged between the EPB controller and the EPB actuator of the vehicle EPB system, so that the connection between the vehicle storage battery and the EPB actuator is realized, or the connection between the EPB controller and the EPB actuator is realized, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so that the EPB controller is communicated with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electronic parking redundancy control system, comprising a redundancy component arranged between an EPB controller and an EPB actuator of a vehicle EPB system, the redundancy component comprising:
the upper end of the combined relay is connected with both the vehicle storage battery and the EPB controller, and the lower end of the combined relay is connected with the EPB actuator so as to selectively communicate the EPB controller with the EPB actuator or communicate the vehicle storage battery with the EPB actuator;
the gateway is connected with the EPB controller, detects the working state of the EPB controller and is connected with the combined relay to realize the control of the combined relay, when the EPB controller is in a normal working state, the gateway drives the combined relay to work so as to communicate the EPB controller with the EPB actuator, when the EPB controller is in a failure state, the gateway drives the combined relay to work so as to communicate the vehicle storage battery with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
2. The electronic parking redundancy control system of claim 1, wherein:
the upper end of the combined relay is connected with a power supply harness of a vehicle storage battery and a power supply harness of the EPB controller;
the lower end of the combined relay is connected with a power supply wiring harness of the EPB actuator.
3. The electronic parking redundancy control system of claim 1, wherein:
the gateway is connected with the EPB controller through a CAN network;
one pin of the gateway is connected with a control pin of the combined relay.
4. The electronic parking redundancy control system of claim 3, wherein:
when the EPB controller works normally, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator;
when the EPB controller fails, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
5. The electronic parking redundancy control system of claim 3, wherein:
when the EPB controller works normally, the gateway outputs low level to a control pin of the combined relay to drive the combined relay to work so that the EPB controller is communicated with the EPB actuator;
when the EPB controller fails, the gateway outputs high level to a control pin of the combined relay to drive the combined relay to work so that the vehicle storage battery is communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped tightly.
6. The electronic parking redundancy control system of claim 1, further comprising, after the gateway actuates the combination relay to communicate the vehicle battery with the EPB actuator and the electronic calipers of the EPB actuator are clamped:
after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator.
7. An electronic parking redundancy control system according to any of claims 1 to 6, characterized in that: when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in a failure state.
8. An electronic parking redundancy control method is realized based on the electronic parking redundancy control system of claim 1, and is characterized by comprising the following steps:
the working state of the EPB controller obtained based on the gateway is as follows:
when the working state of the EPB controller is a normal working state, the gateway drives the combined relay to work so as to communicate the EPB controller with the EPB actuator;
when the working state of the EPB controller is a failure state, the gateway drives the combined relay to work so as to enable the vehicle storage battery to be communicated with the EPB actuator, and the electronic calipers of the EPB actuator are clamped.
9. The electronic parking redundancy control method of claim 8, wherein: when the gateway detects that the signal output by the EPB controller is an invalid signal, the vehicle is in a static state, and the stepping time of the brake pedal exceeds the set time, the gateway judges that the EPB controller is in a failure state.
10. The electronic parking redundancy control method of claim 8, further comprising, after the gateway actuates the combination relay to communicate the vehicle battery with the EPB actuator and the electronic calipers of the EPB actuator are clamped:
after the preset time, the gateway drives the combined relay to work, the communication between the vehicle storage battery and the EPB actuator is disconnected, and the EPB controller is communicated with the EPB actuator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110282195.3A CN113147409A (en) | 2021-03-16 | 2021-03-16 | Electronic parking redundancy control system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110282195.3A CN113147409A (en) | 2021-03-16 | 2021-03-16 | Electronic parking redundancy control system and method |
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| CN113147409A true CN113147409A (en) | 2021-07-23 |
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| CN117734657A (en) * | 2023-12-14 | 2024-03-22 | 磐吉奥科技股份有限公司 | Parking actuator control method, system, electronic device and readable storage medium |
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