CN113428124A - Redundant electronic parking system and control method thereof - Google Patents
Redundant electronic parking system and control method thereof Download PDFInfo
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- CN113428124A CN113428124A CN202110804650.1A CN202110804650A CN113428124A CN 113428124 A CN113428124 A CN 113428124A CN 202110804650 A CN202110804650 A CN 202110804650A CN 113428124 A CN113428124 A CN 113428124A
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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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- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/402—Back-up
Abstract
The invention relates to the technical field of electronic parking, in particular to a redundant electronic parking system and a control method thereof. The redundant electronic parking system comprises M control units, M selectors, an electronic parking switch device and an electronic parking device; m is an integer greater than or equal to 2; the M control units are correspondingly connected with the M selectors one by one; each control unit in the M control units is connected with the electronic parking device through a corresponding selector; the electronic parking switch device is connected with each control unit; the M control units are interconnected; monitoring the fault states of the M control units through communication among the M control units; so that when there is a faulty control unit among the M control units, the electronic parking device can be controlled based on the remaining operable control units; therefore, when the electronic control unit of the brake system fails, the vehicle can still realize full-load parking brake on an 8% slope.
Description
Technical Field
The invention relates to the technical field of electronic parking, in particular to a redundant electronic parking system and a control method thereof.
Background
At present, automobiles are continuously developed towards electronization and intellectualization, and particularly, in recent years, new energy automobiles are rising, so that the design, manufacture, control and other aspects of automobiles are greatly different from those of traditional automobiles.
In terms of chassis brake control, the electronic parking brake EPB is increasingly widely applied. Epb (electrical Park brake), an electronic parking system, uses an electronic button instead of a conventional lever hand brake. Compare in traditional parking braking system, EPB possesses following advantage: the functions of automatic parking, automatic parking release, emergency braking assistance, hill start assistance and the like can be realized, and the comfort and the convenience of parking and the safety when the vehicle fails are improved; different drivers 'strength is different, and there is the difference to actual parking effort traditional parking braking, and EPB braking force is stable, can not vary from person to person, and it is less to occupy the driver's cabin space.
However, as the degree of electronization increases, some problems that have not been considered before with the mechanical parking mechanism also arise. For example, in GB21670, it is necessary to ensure that a vehicle can achieve full-load parking braking on an 8% slope when the electronic control unit of the brake system fails, and in the prior art, if P-range parking is cancelled, when the electronic control unit of the brake system fails, it cannot be satisfied that the vehicle can achieve full-load parking braking on the 8% slope.
Disclosure of Invention
The invention aims to solve the technical problem of how to realize full-load parking braking of a vehicle on an 8% slope when an electric control unit of a braking system fails.
In order to solve the above technical problems, the present application discloses in one aspect a redundant electronic parking system including M control units, M selectors, an electronic parking switch device, and an electronic parking device; m is an integer greater than or equal to 2;
the M control units are correspondingly connected with the M selectors one by one;
each control unit in the M control units is connected with the electronic parking device through a corresponding selector;
the electronic parking switch device is connected with each control unit;
the electronic parking switch device is used for sending a parking request or a parking release request to the control unit; the control unit is used for converting the parking request or the parking release request into an action signal and sending the action signal to the electronic parking device, and the electronic parking device is used for parking or releasing the parking of the vehicle based on the action signal;
the M control units are interconnected; monitoring the fault states of the M control units through communication among the M control units;
when N control units in the M control units have faults, any one of the remaining M-N control units can control the electronic parking device by controlling the selector connected with the control unit, so that parking or parking release of the vehicle is realized, and N is an integer smaller than M.
Optionally, when there is a failure in N control units of the M control units, any control unit of the remaining M-N control units can perform a reset operation on any control unit of the N control units.
Optionally, the M control units include a first control unit and a second control unit;
the M selectors include a first selector and a second selector;
the electronic parking device comprises an electronic parking controller and an electronic parking caliper which are connected;
when the first control unit monitors that the second control unit has faults, the first control unit controls the electronic parking device through the first selector, and parking or parking release of the vehicle is further achieved.
Optionally, the M control units include a first control unit and a second control unit;
the M selectors include a first selector and a second selector;
the electronic parking device comprises a first electronic parking device and a second electronic parking device;
when the first control unit monitors that the second control unit has faults, the first control unit controls the first electronic parking device, and the second electronic parking device is controlled through the second selector, so that parking or parking release of the vehicle is achieved.
Optionally, the M control units include a first control unit, a second control unit, and a third control unit;
the M selectors include a first selector, a second selector, and a third selector;
the electronic parking device comprises an electronic parking controller and an electronic parking caliper which are connected;
when the first control unit monitors that the second control unit and/or the third control unit have faults, the first control unit controls the electronic parking device through the first selector, and parking or parking release of the vehicle is achieved.
Optionally, the system further comprises a power management chip;
the power management chip is connected with the M control units.
Optionally, the number of the power management chips is M; m power management chips are correspondingly connected with M control units one by one; alternatively, the first and second electrodes may be,
the number of the power management chips is L; l is an integer greater than 1 and less than M; the L power management chips are correspondingly connected with the L control units in the M control units one by one; the remaining M-L control units are connected with any one of the L power management chips.
Optionally, the number of the power management chips is M; m power management chips are correspondingly connected with M selectors one by one; alternatively, the first and second electrodes may be,
the number of the power management chips is L; l is an integer greater than 1 and less than M; the L power management chips are correspondingly connected with the L selectors in the M selectors one by one; the remaining M-L selectors are connected to any one of the L power management chips.
Optionally, the electronic parking switch device comprises an electronic parking switch and a signal processing module which are connected;
the signal processing module is connected with the M control units.
The application also discloses a redundant electronic parking control method which is applied to a redundant electronic parking system; the redundant electronic parking system comprises M control units, M selectors, an electronic parking switch device and an electronic parking device; m is an integer greater than or equal to 2; the method comprises the following steps:
acquiring a parking request or a parking release request sent by the electronic parking switch;
acquiring the fault state of the current control unit according to the parking request or the parking release request; the M control units are interconnected; the M control units are correspondingly connected with the M selectors one by one; each control unit in the M control units is connected with the electronic parking device through a corresponding selector;
if the fault state of the current control unit is a fault, acquiring the fault states of M-1 control units;
and if the fault state of N-1 control units in the M-1 control units is a fault, controlling the electronic parking device to perform parking or parking release operation by controlling the corresponding selector based on any one control unit in the remaining M-N control units, wherein N is an integer less than M.
By adopting the technical scheme, the redundant electronic parking system provided by the application has the following beneficial effects:
1) the application provides an electron parking system includes a plurality of the control unit, with the selector of the control unit one-to-one to make the control unit can be through the switching state of control rather than the selector that corresponds, and then realize controlling electron parking device's state, make control stability good, can effectively guarantee the uniqueness of output, avoid appearing output logic confusion.
2) And the control units are interconnected, and the fault states of the control units are monitored through communication among the control units, so that when the current default controller fails, the fault state is determined by other controllers through the question and answer communication result because the current default controller is in real-time communication with other controllers, and then the other controllers take over the control of the electronic parking device, so that the parking or parking release of the vehicle is realized, the circuit structure is simplified, and the full-load parking brake of the vehicle on a ramp of 8 percent can be realized under the condition that one control unit fails.
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 alternative electronic parking system of the present application;
FIG. 2 is a schematic structural diagram of an alternative electronic parking system of the present application;
FIG. 3 is a schematic structural diagram of another alternative electronic parking system of the present application;
FIG. 4 is a schematic structural diagram of another alternative electronic parking system of the present application;
FIG. 5 is a schematic structural diagram of another alternative electronic parking system of the present application;
FIG. 6 is a schematic structural diagram of another alternative electronic parking system of the present application;
FIG. 7 is a schematic structural diagram of an alternative electronic parking system of the present application;
FIG. 8 is a schematic structural diagram of another alternative electronic parking system of the present application;
FIG. 9 is a schematic structural diagram of an alternative electronic parking system of the present application;
fig. 10 is a schematic structural diagram of another alternative electronic parking system of the present application.
The following is a supplementary description of the drawings:
1-a control unit; 11-a first control unit; 12-a second control unit; 13-a third control unit; 2-a selector; 21-a first selector; 22-a second selector; 23-a third selector; 3-an electronic parking switch device; 31-electronic parking switch; 32-a signal processing module; 4-an electronic parking device; 41-electronic parking controller; 411-electronic parking control chip; 4111-a first electronic parking control chip; 4112-an electronic parking control chip; a 412-H bridge; 4121-first H bridge; 4122-second H bridge; 42-electronic parking calipers; 421-a first electronic parking caliper; 422-second electronic parking caliper; 43-a first electronic parking device; 44-a second electronic parking device; 5-reverse connection circuit; 6-power input port; 7-a fuse; 8-an ignition device; 9-power management chip.
Detailed Description
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. It is to be understood that the embodiments described are only a few embodiments of the present application and 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.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an alternative electronic parking system according to the present application. The present application discloses in one aspect a redundant electronic parking system comprising M control units 1, M selectors 2, an electronic parking switch device 3 and an electronic parking device 4; m is an integer greater than or equal to 2; the M control units 1 are correspondingly connected with the M selectors 2 one by one; each control unit 1 of the M control units 1 is connected to the electronic parking device 4 through a corresponding selector 2; the electronic parking switch device 3 is connected to each control unit 1; the electronic parking switch device 3 is used to send a parking request or a parking release request to the control unit 1; the control unit 1 is configured to convert the parking request or parking release request into an action signal and send the action signal to the electronic parking device 4, where the electronic parking device 4 is configured to implement parking or parking release of the vehicle based on the action signal; the M control units 1 are interconnected; monitoring the fault states of the M control units 1 through communication among the M control units 1; when N control units 1 of the M control units 1 have a fault, any control unit 1 of the remaining M-N control units 1 can control the electronic parking device 4 by controlling the selector 2 connected thereto, thereby implementing parking or parking release of the vehicle, where N is an integer smaller than M.
As can be seen from the above description, firstly, since the selector 2 is arranged between each control unit 1 and the electronic parking device 4 in the present application, it is effectively ensured that the logic signal output by the selector 2 controlled by the control unit 1 is unique, output logic disorder is avoided, and the stability of the circuit is improved; in the driving condition in the prior art, two control modules are used for driving the same motor driving module, the motor driving module is required to have two independent driving inputs, and the motor driving module with the internal redundancy double-input channel has high cost, and the two control modules may not be fixed in state under the abnormal condition, so that the output of the driving module is easy to be disordered, and the parking device cannot act; secondly, due to the interconnection among a plurality of control units 1 in the application, the real-time communication among the control units can be realized, and further the monitoring of mutual fault states is carried out, namely the states of the control units are continuously reported to other control units 1, if one control unit 1 has a fault, for example, a program runs off and loses communication; the other control units 1 receive the information, so that the electronic parking system can start the control unit 1 in a normal working state to control the corresponding selector 2 and the electronic parking device 4, and the full-load parking brake of the vehicle on an 8% slope can still be realized.
In order to ensure the utilization rate of the device and the stability of the circuit, in an alternative embodiment, when N control units 1 in the M control units 1 have a fault, any control unit 1 in the remaining M-N control units 1 can perform a reset operation on any control unit 1 in the N control units 1; through the reset operation, namely, the restart operation, the recovery probability of the fault control unit 1 is improved, if the fault control unit is recovered, the fault control unit is listed in a list of the control units 1 which normally work, and if the fault control unit still cannot normally work, the selector 2 connected with the fault control unit 1 can be disconnected, so that the stability of the circuit is ensured.
In an alternative embodiment, as shown in fig. 2, fig. 2 is a schematic structural diagram of another alternative electronic parking system of the present application. The M control units 1 include a first control unit 11 and a second control unit 12; the M selectors 2 include a first selector 21 and a second selector 22; the electronic parking device 4 comprises an electronic parking controller 41 and an electronic parking caliper 42 which are connected; when the first control unit 11 monitors that the second control unit 12 has a fault, the first control unit 11 controls the electronic parking device 4 through the first selector 21, so as to realize parking or parking release of the vehicle. The electronic parking system provided by the embodiment has the advantages of simple structure and low cost.
In order to improve the flexibility of the application range of the electronic parking system; in another alternative embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of another alternative electronic parking system of the present application. The M control units 1 include a first control unit 11 and a second control unit 12; the M selectors 2 include a first selector 21 and a second selector 22; the electronic parking device 4 includes a first electronic parking device 43 and a second electronic parking device 44; when the first control unit 11 monitors that the second control unit 12 has a fault, the first control unit 11 controls the first electronic parking device 43, and controls the second electronic parking device 44 through the first selector 21, so as to realize parking or parking release of the vehicle; optionally, the first electronic parking device 43 includes an electronic parking controller 41 and an electronic parking caliper 42 connected; the second electronic parking device 44 includes an electronic parking controller 41 and an electronic parking caliper 42 connected.
In an alternative embodiment, as shown in fig. 4, fig. 4 is a schematic structural diagram of another alternative electronic parking system of the present application. The M control units 1 include a first control unit 11, a second control unit 12, and a third control unit 13; the M selectors 2 include a first selector 21, a second selector 22, and a third selector 23; the electronic parking device 4 comprises an electronic parking controller 41 and an electronic parking caliper 42 which are connected; when the first control unit 11 monitors that the second control unit 12 and the third control unit 13 have faults, the first control unit 11 controls the electronic parking device 4 through the first selector 21, so as to realize parking or parking release of the vehicle; alternatively, it may be monitored that one of the second control unit 12 and the third control unit 13 has a failure, and the control may be performed by using only the first control unit 11, or may be performed based on the other control units 1 that have not failed.
It should be noted that the number of M in the present application may be 4, 5, or 6, if necessary, and is not limited herein, but in consideration of the cost, the convenience of control, and the redundancy effect, M is equal to 2 in the preferred embodiment of the present application.
In an alternative embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of another alternative electronic parking system of the present application. The number of the electronic parking calipers 42 is M, and the electronic parking controller 41 includes M electronic parking control chips 4112 and M H-bridges 412; a first end of each H-bridge 412 is connected with a corresponding electronic parking control chip 4112, a second end of each H-bridge 412 is connected with a corresponding electronic parking bridge, and a third end of each H-bridge 412 is connected with a power input port 6; each electronic parking control chip 4112 is connected with a corresponding selector 2; that is, each electronic parking control chip 4112 is connected to only one H-bridge 412, one H-bridge 412 is also connected to only one electronic parking chip, and one electronic parking caliper 42 is connected to one H-bridge 412; therefore, the control process can be simplified, and the response efficiency is improved; alternatively, as shown in fig. 6, fig. 6 is a schematic structural diagram of another alternative electronic parking system of the present application. The M-1 selectors 2 are connected with any one of the M electronic parking control chips 4112, so that when the control unit 1 corresponding to the electronic parking control chip 4112 connected with the selectors 2 fails, other control units 1 can further control the two parking control chips through the selectors 2 corresponding to the controllers; alternatively, as shown in fig. 7, fig. 7 is a schematic structural diagram of another alternative electronic parking system of the present application. In order to further improve the flexibility of the electronic parking system, one of the M electronic parking control chips 4112 is connected to the corresponding selector 2, and the remaining M-1 electronic parking control chips 4112 are connected to M-1 control units 1 in a one-to-one correspondence manner; the rest M-1 selectors 2 are correspondingly connected with the corresponding M-1 control units 1 one by one; for better understanding of the present embodiment, for example, as shown in fig. 8, fig. 8 is a schematic structural diagram of another alternative electronic parking system of the present application. The electronic parking controller 41 includes a first electronic parking control chip 41121, a second electronic parking control chip 4112, a first H bridge 4121 and a second H bridge 4122, and the number of the electronic parking calipers 42 is 2, that is, a first electronic parking caliper 421 and a second electronic parking caliper 422; the first electronic parking control chip 41121 is connected to the first selector 21 and the first end of the first H-bridge 4121, respectively; a second end of the first H-bridge 4121 is connected to the first electronic parking caliper 421; the third end of the first H-bridge 4121 is connected to the power input port 6; the first selector 21 is connected to the first control unit 11; the second electronic parking control chip 4112 is connected to the second control unit 12 and the second end of the second H-bridge 4122, respectively; the third end of the second H-bridge 4122 is connected to the power input port 6, wherein the second selector 22 is respectively connected to the second control unit 12 and the first electronic parking control chip 41121.
In an alternative embodiment, in order to avoid reverse connection, as can be seen from fig. 5, the electronic parking system further comprises a reverse connection prevention circuit 5; the power input port 6 is connected with the H-bridge 412 through the reverse connection circuit 5; the reverse connection preventing circuit 5 comprises an NMOS tube and a diode; one end of the diode is connected with the source electrode of the NMOS tube, and the other end of the diode is connected with the drain electrode of the NMOS tube.
In order to further simplify the circuit and reduce the cost, in another alternative embodiment, the number of the electronic parking calipers 42 is one, and the electronic parking controller 41 includes a first electronic parking control chip 41121 and a first H-bridge 4121; the first end of the first H bridge 4121 is connected to the first electronic parking control chip 41121, the second end of the first H bridge 4121 is connected to the electronic parking caliper 42, the third end of the first H bridge 4121 is connected to the power input port 6, and the first electronic parking control chip 41121 is connected to the M selectors 2, respectively.
It should be noted that the number of the electronic parking calipers 42 in the present application may also be L, such as 2, 3, 4, etc., and as can be seen from the above description, L is smaller than M; in an optional embodiment, when the electronic parking controller 41 includes M electronic parking control chips 4112 and L H bridges 412, the L electronic parking control chips 4112 and the L H bridges 412 are connected in a one-to-one correspondence, and the M electronic parking control chips 4112 are connected with the M selectors 2 in a one-to-one correspondence; the L electronic parking calipers 42 are connected with the L H bridges 412 in a one-to-one correspondence, and the remaining M-L electronic parking control chips 4112 are connected with any one of the L H bridges 412, or a plurality thereof; preferably, the number of the electronic parking calipers 42 is 2, that is, one electronic parking caliper 42 is respectively arranged on the left wheel and the right wheel of the vehicle, so that the structural complexity and the cost of the system can be reduced while effective parking is ensured; in another alternative embodiment, the electronic parking controller 41 may further include 2, 3, etc. L electronic parking control chips 4112; the L electronic parking control chips 4112 are connected to the L selectors 2 in a one-to-one correspondence, and the remaining M-L selectors 2 are connected to any one of the electronic parking control chips 4112.
In an alternative embodiment, as shown in fig. 9, fig. 9 is a partial schematic structural view of another alternative electronic parking system of the present application. The electronic parking system further comprises a power management chip 9; the power management chip 9 is connected to the M control units 1, and the power management chip 9 is used for managing power supply to the control units 1.
Optionally, the electronic parking system further comprises a fuse 7; the first end of the fuse 7 is connected with the power management chip 9; the second end of the fuse 7 is connected with the ignition device 8 through a diode; therefore, when the overcurrent condition occurs in the system circuit, the fuse 7 can be fused to protect the devices in the whole system from being burnt out, the stability of the system can be effectively ensured, and the current backflow is avoided.
In an alternative embodiment, as can be seen from fig. 9, the number of the power management chips 9 is M; the M power management chips 9 are connected with the M control units 1 in a one-to-one correspondence mode, so that the stability of the circuit is further improved, and when one or more control units 1 fail, other control units 1 can take over the work to realize the control of the electronic parking device 4.
To simplify the circuitry and reduce cost; in another optional embodiment, the number of the power management chips 9 is L; l is an integer greater than 1 and less than M; the L power management chips 9 are connected with the L control units 1 in the M control units 1 in a one-to-one correspondence manner; the remaining M-L control units 1 are connected to any one of the L power management chips 9; namely, in the embodiment of the present application, there is a case where one power management chip 9 controls a plurality of control units 1, which can effectively reduce the cost; in another optional embodiment, only one power management chip 9 may be provided in the present application, and the M control units 1 are all connected to the power management chip 9, so as to further effectively simplify the circuit and reduce the cost, improve the application range and flexibility of the electronic parking system, and select the above circuit as required.
In another optional embodiment, the number of the power management chips 9 is M; the M power management chips 9 are correspondingly connected with the M selectors 2 one by one; therefore, power can be independently supplied to the selector 2, and the stability of the circuit is improved.
In another optional embodiment, the number of the power management chips 9 is L; l is an integer greater than 1 and less than M; the L power management chips 9 are connected with the L selectors 2 in the M selectors 2 in a one-to-one correspondence manner; the remaining M-L selectors 2 are connected to any one of the L power management chips 9; namely, in the embodiment of the present application, there is a case where one power management chip 9 controls a plurality of selectors 2, which can effectively reduce the cost; in another optional embodiment, only one power management chip 9 may be provided in the present application, and the M selectors 2 are all connected to the power management chip 9, so as to further effectively simplify the circuit and reduce the cost, improve the application range and flexibility of the electronic parking system, and select the circuit as needed.
It should be noted that, in this embodiment, when a plurality of power management chips 9 are provided and the power management chips 9 are individually connected to the control units 1 and the selectors 2, the power management chips 9 corresponding to any one of the control units 1 and the selector 2 correspondingly connected to the control unit 1 are the same, which can effectively ensure that when the power management chip 9 has a fault, the corresponding control unit 1 and the corresponding selector 2 are both in an inoperative state, thereby ensuring the stability of the circuit; optionally, referring to fig. 9, the power management chip 9 is connected redundantly with the control unit 1.
In an alternative embodiment, as can be seen from fig. 9, the electronic parking switch device 3 includes an electronic parking switch 31 and a signal processing module 32 connected; the signal processing module 32 is connected to the M control units 1, and the signal processing module 32 is configured to recognize a signal sent by the electronic parking switch 31, convert the signal into an action signal, and send the action signal to the control unit 1, so that the control unit 1 can control subsequent devices based on the action signal.
Fig. 10 is a schematic structural diagram of another alternative electronic parking system according to the present application, as shown in fig. 10. In another alternative embodiment, in order to simplify the description, the same structure in fig. 10 as that in fig. 8 is not repeated again, except that the second control unit 12 in fig. 10 corresponds to the first control unit 11 in fig. 8, and similarly, the first control unit 11 in fig. 10 corresponds to the second control unit 12 in fig. 8, which further increases the flexibility of the system configuration; SPI in fig. 10 indicates a communication connection, RST indicates a reset signal, and CTL indicates a control signal; 3V3 indicates a supply voltage of 3.3V; EPB _ Ctl _ Mon represents a monitor signal; and the system of fig. 10 further comprises an ignition device 8, a fuse 7 and a diode, connected in the manner described above with reference to fig. 9.
It should be noted that the electronic parking system in the present application may select one control unit 1 as the control unit 1 that operates by default, such as the first control unit 11; of course, if necessary, a plurality of control units 1 may also operate simultaneously, but when a plurality of control units 1 operate simultaneously, it is necessary to ensure that each control unit 1 in the plurality of control units 1 controls one corresponding electronic parking caliper 42 to operate, and it cannot be that a plurality of control units 1 operating simultaneously control the same electronic parking caliper 42.
The application also discloses a redundant electronic parking control method which is applied to a redundant electronic parking system; the redundant electronic parking system comprises M control units 1, M selectors 2, an electronic parking switch device 3 and an electronic parking device 4; m is an integer greater than or equal to 2; the method comprises the following steps:
1) acquiring a parking request or a parking release request sent by the electronic parking switch 31;
2) acquiring the current fault state of the control unit 1 according to the parking request or the parking release request; the M control units 1 are interconnected; the M control units 1 are correspondingly connected with the M selectors 2 one by one; each control unit 1 of the M control units 1 is connected to the electronic parking device 4 through a corresponding selector 2;
3) if the fault state of the current control unit 1 is a fault, acquiring M-1 fault states of the control unit 1;
4) if the failure state of N-1 control units 1 in the M-1 control units 1 is failure, the control unit 1 controls the corresponding selector 2 based on any one of the remaining M-N control units 1 to implement the parking or parking release operation of the electronic parking device 4, where N is an integer smaller than M.
The control method realized by the steps 1-4) has the advantage of effectively ensuring that the vehicle realizes full-load parking braking on an 8% slope when one control unit 1 fails.
It should be noted that, differences in the electronic control circuits may cause different processes of the electronic devices through which the current flows in the corresponding electronic parking control methods, and please refer to the above description of the embodiments of the electronic parking control system in other alternative electronic parking control methods.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A redundant electronic parking system is characterized by comprising M control units (1), M selectors (2), an electronic parking switch device (3) and an electronic parking device (4); m is an integer greater than or equal to 2;
the M control units (1) are correspondingly connected with the M selectors (2) one by one;
each control unit (1) of the M control units (1) is connected with the electronic parking device (4) through a corresponding selector (2);
the electronic parking switch device (3) is connected with each control unit (1);
the electronic parking switch device (3) is used for sending a parking request or a parking release request to the control unit (1); the control unit (1) is used for converting the parking request or parking release request into an action signal and sending the action signal to the electronic parking device (4), and the electronic parking device (4) is used for realizing parking or parking release of a vehicle based on the action signal;
the M control units (1) are interconnected; monitoring the fault states of the M control units (1) through communication among the M control units (1);
when N control units (1) in the M control units (1) have faults, any control unit (1) in the remaining M-N control units (1) can control the electronic parking device (4) by controlling the selector (2) connected with the control unit, and further parking or parking release of the vehicle is achieved, wherein N is an integer smaller than M.
2. The redundant electronic parking system according to claim 1, characterized in that when there is a failure in N control units (1) of the M control units (1), any one control unit (1) of the remaining M-N control units (1) is capable of performing a reset operation on any one control unit (1) of the N control units (1).
3. Redundant electronic parking system according to claim 1, characterized in that said M control units (1) comprise a first control unit (11) and a second control unit (12);
the M selectors (2) comprise a first selector (21) and a second selector (22);
the electronic parking device (4) comprises an electronic parking controller (41) and an electronic parking caliper (42) which are connected;
when the first control unit (11) monitors that the second control unit (12) has a fault, the first control unit (11) controls the electronic parking device (4) through the first selector (21), and then parking or parking release of the vehicle is achieved.
4. The redundant electronic parking system according to claim 1, characterized in that said M control units (1) comprise a first control unit (11) and a second control unit (12);
the M selectors (2) comprise a first selector (21) and a second selector (22);
the electronic parking device (4) comprises a first electronic parking device (43) and a second electronic parking device (44);
when the first control unit (11) monitors that the second control unit (12) has a fault, the first control unit (11) controls the first electronic parking device (43), and controls the second electronic parking device (44) through the second selector (22), so that parking or parking release of the vehicle is realized.
5. Redundant electronic parking system according to claim 1, characterized in that said M control units (1) comprise a first control unit (11), a second control unit (12) and a third control unit (13);
the M selectors (2) comprise a first selector (21), a second selector (22) and a third selector (23);
the electronic parking device (4) comprises an electronic parking controller (41) and an electronic parking caliper (42) which are connected;
when the first control unit (11) monitors that the second control unit (12) and/or the third control unit (13) have faults, the first control unit (11) controls the electronic parking device (4) through the first selector (21), and then parking or parking release of the vehicle is achieved.
6. The redundant electronic parking system according to claim 1, further comprising a power management chip (9);
the power management chip (9) is connected with the M control units (1).
7. The redundant electronic parking system according to claim 6, characterized in that the number of said power management chips (9) is M; the M power management chips (9) are correspondingly connected with the M control units (1) one by one; alternatively, the first and second electrodes may be,
the number of the power management chips (9) is L; l is an integer greater than 1 and less than M; the L power management chips (9) are correspondingly connected with the L control units (1) in the M control units (1) one by one; the remaining M-L control units (1) are connected with any one of the L power management chips (9).
8. The redundant electronic parking system according to claim 6, characterized in that the number of said power management chips (9) is M; the M power management chips (9) are correspondingly connected with the M selectors (2) one by one; alternatively, the first and second electrodes may be,
the number of the power management chips (9) is L; l is an integer greater than 1 and less than M; the L power management chips (9) are correspondingly connected with the L selectors (2) in the M selectors (2) one by one; the remaining M-L selectors (2) are connected to any one of the L power management chips (9).
9. The redundant electronic parking system according to claim 1, characterized in that the electronic parking switch device (3) comprises an electronic parking switch (31) and a signal processing module (32) connected;
the signal processing module (32) is connected with the M control units (1).
10. A redundant electronic parking control method is characterized by being applied to a redundant electronic parking system; the redundant electronic parking system comprises M control units (1), M selectors (2), an electronic parking switch device (3) and an electronic parking device (4); m is an integer greater than or equal to 2; the method comprises the following steps:
acquiring a parking request or a parking release request sent by the electronic parking switch (31);
acquiring the current fault state of the control unit (1) according to the parking request or the parking release request; the M control units (1) are interconnected; the M control units (1) are correspondingly connected with the M selectors (2) one by one; each control unit (1) of the M control units (1) is connected with the electronic parking device (4) through a corresponding selector (2);
if the fault state of the current control unit (1) is a fault, acquiring the fault states of M-1 control units (1);
if the fault state of N-1 control units (1) in the M-1 control units (1) is fault, controlling the corresponding selector (2) to realize the parking or parking releasing operation of the electronic parking device (4) based on any one control unit (1) in the remaining M-N control units (1), wherein N is an integer less than M.
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| CN202110804650.1A CN113428124A (en) | 2021-07-16 | 2021-07-16 | Redundant electronic parking system and control method thereof |
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| CN202110804650.1A CN113428124A (en) | 2021-07-16 | 2021-07-16 | Redundant electronic parking system and control method thereof |
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| CN113428124A true CN113428124A (en) | 2021-09-24 |
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