CN117962839A - Power supply monitoring and failure processing method for parking system of vehicle - Google Patents
Power supply monitoring and failure processing method for parking system of vehicle Download PDFInfo
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- CN117962839A CN117962839A CN202211314534.2A CN202211314534A CN117962839A CN 117962839 A CN117962839 A CN 117962839A CN 202211314534 A CN202211314534 A CN 202211314534A CN 117962839 A CN117962839 A CN 117962839A
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Abstract
The invention relates to a power supply monitoring and failure processing method for a parking system of a vehicle, wherein the parking system comprises a main parking system and a standby parking system, and the power supply monitoring and failure processing method comprises the following steps: a) When detecting that the power supply of the parking system is partially abnormal, requesting to enter a gear degradation mode I by a gear arbitration system; b) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is not in a parking state at the moment, the gear arbitration system requests to enter a gear degradation mode II; c) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is in the parking state at this time, the gear arbitration system maintains the parking state and prompts a driver that the parking system needs maintenance. The invention further relates to a power supply monitoring and failure handling system for a parking system of a vehicle.
Description
Technical Field
The invention relates to a power supply monitoring and failure processing method for a parking system of a vehicle. The invention further relates to a power supply monitoring and failure handling system for a parking system of a vehicle.
Background
If the parking system can normally run, the safety of the whole vehicle is affected, and once the parking system fails, the safety and other problems of the vehicle can possibly occur, and personal injury can be seriously caused. With the improvement of safety awareness of whole factories and consumers, the application of the redundant parking system is more and more extensive, and the redundant parking system provides a redundant standby parking system, so that the parking operation can be independently completed when the main parking fails, and the failure rate of the parking system is reduced. Because of design limitations, the standby parking system and the main parking system of the whole vehicle factory currently share a power supply, and once the power supply fails, common cause failure is easy to occur. Therefore, how to effectively monitor and design a failure processing method reasonably for a redundant power supply is a problem to be solved urgently in system development.
Disclosure of Invention
The invention provides a power supply monitoring and failure processing method for a parking system. According to the method, the parking system can effectively monitor the power supply of the parking system under various power supply failure working conditions through the redundant power supply and the degradation work of the redundant parking execution system, so that potential safety hazards are eliminated to the greatest extent.
According to one aspect of the present invention, there is provided a power supply monitoring and failure processing method for a parking system of a vehicle, wherein the parking system includes a main parking system and a standby parking system, wherein the power supply monitoring and failure processing method includes the steps of:
a) When detecting that the power supply of the parking system is partially abnormal, requesting to enter a gear degradation mode I by a gear arbitration system;
b) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is not in a parking state at the moment, the gear arbitration system requests to enter a gear degradation mode II;
c) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is in the parking state at this time, the gear arbitration system maintains the parking state and prompts a driver that the parking system needs maintenance.
According to a preferred embodiment of the present invention, wherein the abnormality of the power generation part of the parking system includes one of the following:
the standby power supply voltage of the main parking system is abnormal;
the main power supply voltage of the main parking system is abnormal;
And the power supply voltage of the standby parking system is abnormal.
According to a preferred embodiment of the present invention, the occurrence of serious abnormality of the power supply of the parking system includes:
and the main power supply voltage and the standby power supply voltage of the main parking system are abnormal.
According to a preferred embodiment of the present invention, wherein the main parking system comprises:
A gear executing system; and
And the gear executing system is connected with the gear executing system, the gear P controller, the gear P motor, the parking mechanism and the gear P sensor.
According to a preferred embodiment of the present invention, the standby parking system includes:
A brake control system;
The EPB motor is connected with the brake control system, the EPB motor is connected with the brake caliper, and the EPB sensor is connected with the brake caliper; and
Other alternate parking means that can independently provide parking.
According to a preferred embodiment of the present invention, the first gear degradation mode includes:
when the driver requests a P gear, the parking system requests a P gear and requests EPB engagement; when the driver requests a P gear after the power generation part of the parking system abnormally maintains a certain driving cycle, the request instrument system prompts the driver that the parking system needs to be maintained, and meanwhile, the P gear is requested to be executed, the EPB combination is requested, and the release is not allowed. And after a certain driving cycle is eliminated by partial abnormality of the power supply of the parking system, the parking system is restored to normal operation. Gear degradation mode one is a recoverable failure mode.
According to a preferred embodiment of the present invention, the gear degradation mode two includes:
when the driver requests a P gear, the park system requests an N gear and requests EPB engagement; when the driver requests a P gear after a certain driving cycle is maintained due to serious abnormality of the power supply of the parking system, the request instrument system prompts the driver that the parking system needs to be maintained, and simultaneously requests to execute N gear and EPB combination and does not allow release. And after the serious power supply abnormality eliminates a certain driving cycle, the parking system resumes normal operation. The gear degradation mode two is a recoverable failure mode.
According to a preferred embodiment of the present invention, wherein maintaining the parking state comprises:
The vehicle maintains a P range engaged state and does not respond to any shift request by the driver. The state is an unrecoverable failure mode
According to a preferred embodiment of the invention, wherein prompting the driver that the parking system needs to be serviced comprises the following prompting means:
the instrument panel screen text prompt information, the warning tone and the vibration.
According to a preferred embodiment of the present invention, the power failure condition includes, but is not limited to:
the related power supply voltage value exceeds a specified range, a voltage module for monitoring power supply voltage abnormality and an ADC module fault.
According to another aspect of the present invention, there is provided a power supply monitoring and failure processing system for a parking system of a vehicle, wherein the power supply monitoring and failure processing system is configured to perform the power supply monitoring and failure processing method according to the present invention.
According to another aspect of the present invention, there is provided a power monitoring method for a parking system, the main parking system and the standby parking system simultaneously monitoring their own power systems, the method comprising:
when the main parking system detects that the power supply of the self power supply system is abnormal, the main parking system judges the abnormal type of the power supply, reports that the main parking system of the gear arbitration system has faults, and selects to switch the power supply or maintain the last effective state, and comprises the following steps:
When the main parking system detects that the main power supply of the self power supply system is abnormal, the main parking system of the gear arbitration system is reported to have faults, and the main parking power supply is switched to the standby power supply.
According to a preferred embodiment of the invention, the method further comprises:
the gear arbitration system requests to enter a gear degradation mode I, and comprises a gear requesting display system for prompting a driver that a parking system has a fault and a gear requesting execution system P gear and a brake control system EPB combination when the driver requests P gear;
When the main power supply is abnormally maintained for a certain driving cycle, and a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system P gear to be combined with the brake control system EPB and does not allow release.
And after the main power supply is abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
When the main parking system detects that the standby power supply of the self power supply system is abnormal, the main parking system of the gear arbitration system is reported to have faults.
According to a preferred embodiment of the invention, the method further comprises:
the gear arbitration system requests to enter a gear degradation mode I, and comprises a gear requesting display system for prompting a driver that a parking system has a fault and a gear requesting execution system P gear and a brake control system EPB combination when the driver requests P gear;
When the standby power supply abnormally maintains a certain driving cycle, and a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system P gear to be combined with the brake control system EPB and does not allow release.
And after the standby power supply is abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
When the main parking system detects that the main power supply and the standby power supply of the self power supply system are abnormal at the same time, a serious fault exists in the main parking system of the gear arbitration system, and the main parking system maintains the last effective state. The gear arbitration system selects the system to maintain in a parking state or switches the parking system to a standby parking system according to the current state of the main parking system.
When the current main parking state is a locking P-gear state, the gear arbitration system maintains the vehicle in a parking state and requests a driver to maintain the parking system;
when the current state of the main parking is a state of hanging up the P gear, the gear arbitration system switches the parking system to the standby parking system, and the standby parking system completes the parking operation;
according to a preferred embodiment of the invention, the method further comprises:
The gear arbitration system requests to enter a gear degradation mode II, and comprises a gear requesting display system for prompting a driver that a serious fault exists in a parking system, and a gear requesting execution system N gear and a brake requesting control system EPB are combined when the driver requests P gear;
when the main power supply and the standby power supply abnormally maintain a certain driving cycle, and a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system N gear to be combined with the brake control system EPB and does not allow release.
And after the main power supply and the standby power supply are abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
When the standby parking system detects any abnormality of the power supply system, the standby parking system of the gear arbitration system is reported to have a fault.
According to a preferred embodiment of the invention, the method further comprises:
the gear arbitration system requests to enter a gear degradation mode I, and comprises a gear requesting display system for prompting a driver that a parking system has a fault and a gear requesting execution system P gear and a brake control system EPB combination when the driver requests P gear;
When the power supply is abnormal and maintains a certain driving cycle, and when a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system P gear to be combined with the brake control system EPB and does not allow release.
And after the power supply is abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
In the power supply monitoring method of the parking system, the main parking system and the standby parking system simultaneously monitor the safety of the respective power supply systems. When the main power supply of the main parking system is abnormal, the system is switched to the standby power supply and enters a degradation mode I. And when the standby power supply of the main parking system is abnormal, entering a degradation mode I. When the main power supply and the standby power supply of the parking system are abnormal, if the current parking motor is locked, the parking system is locked at the P gear. And if the current parking motor is in an unlocking state, entering a degradation mode II. And when any power supply of the standby parking system is abnormal, entering a degradation mode I. The invention designs a power supply monitoring strategy with high robustness and a corresponding power supply failure processing method, so that potential safety hazards caused by power supply system abnormality to a parking system are eliminated to the greatest extent, and once the power supply abnormality of the parking system is detected, the whole vehicle is immediately controlled to enter a safe state, thereby ensuring the safety of the vehicle.
According to another aspect of the invention, a processing method is provided that enables a parking system to operate downgrade through a redundant power supply and a redundant parking execution system under multiple power failure conditions. The system mainly comprises: a gear display system, a gear arbitration system, a gear execution system and a brake control system. The gear executing system is used as a main parking access two-way main power supply and the brake control system is used as a standby parking access main power supply. When any point of a power supply of the parking system fails, whether the current parking motor is combined or not can be guaranteed, the vehicle can be normally parked, the gear arbitration system enters a degradation mode, and driving experience is considered on the basis of meeting regulations and safety.
Specifically, by the power supply monitoring and failure processing method for the parking system, the whole power supply failure mode of the parking system can be covered by the diagnosis strategy.
Additionally, when the power supply of the main parking system and the standby parking system fails, a gear degradation mode is entered, so that a driver is allowed to continue to use the gear function in a limited manner, and the usability and safety integrity of the function can be simultaneously met.
Additionally, after entering a gear degradation mode, a fault driving cycle counter is set to record the number of remaining usable driving cycles of the gear function, and the fault driving cycle counter is dynamically adjusted along with the continuous fault state, so that the experience of a driver is ensured to the greatest extent.
Additionally, if the fault driving cycle counter is cleared, the fault is deemed to be eliminated; if the fault driving cycle counter reaches the upper limit, the fault is considered unrecoverable and the vehicle enters a safe state.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic architecture diagram of a parking system according to an embodiment of the present invention;
fig. 2 is a flowchart of a power monitoring and failure processing method of a parking system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described in the following in conjunction with the accompanying drawings in the embodiments of the present application, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and thus the protection scope of the present application is more clearly and clearly defined. The specific examples described herein are intended to be illustrative of the application only and are not intended to be limiting.
At present, many enterprises develop the work in the aspect of functional safety, the existing parking system decomposes the safety target through a redundant means, and the P-gear and the EPB are respectively used as a main parking system and a standby parking system, so that potential safety hazards caused by failure of the parking system can be eliminated to the greatest extent under the condition of meeting the functional safety requirement, and the increase of cost can be controlled as much as possible.
Referring to fig. 1, an architectural schematic diagram of a parking system is depicted. The automobile redundant control parking system comprises a gear arbitration system, a gear display system, a gear execution system, a brake control system and the like. The main parking system is a gear executing system and related components thereof, and the standby parking system is a brake control system and related components thereof.
The gear arbitration system is used for detecting and obtaining a driver parking request, sending a parking command to the gear execution system and the brake control system (if necessary), and sending and displaying gear information and driver prompt information to the gear display system.
The gear display system is used for displaying gear information and driver prompt information.
The gear executing system is connected with components of the main parking system: the gear control device comprises a P gear controller, a P gear motor, a P gear sensor and a parking mechanism, wherein the P gear controller is used for receiving and executing a parking instruction of a gear arbitration system, feeding back a gear execution state to the gear arbitration system and feeding back a gear execution system fault state to the gear arbitration system. When the gear executing system analyzes the parking signal, the parking signal is immediately forwarded to the P gear controller, the P gear controller controls the P gear motor to move to lock the parking mechanism, state information of the parking mechanism is transmitted back to the gear executing system through the P gear sensor, and the gear executing system analyzes the information of the P gear sensor and transmits real gear information back to the gear arbitration system.
The brake control system is connected with components of the standby parking system: EPB controller, EPB motor, EPB sensor, brake caliper. When the brake control system analyzes the EPB request signal, the EPB request signal is immediately sent to the EPB controller, the EPB controller controls the EPB motor to move the brake caliper, state information of the brake caliper is transmitted back to the brake control system through the EPB sensor, and the brake control system analyzes the EPB sensor information and sends the EPB state back to the gear arbitration system.
Fig. 2 is a flowchart illustrating a power monitoring and failure handling method of a parking system according to an embodiment of the present invention.
Specifically, the method may specifically include:
The gear executing system and the P gear controller monitor the power supply of the main parking system at the same time;
When the gear executing system or the P gear controller detects that the standby power supply voltage of the main parking system is abnormal, requesting the gear arbitration system to enter a gear degradation mode I;
When the gear executing system or the P gear controller detects that the main power supply voltage of the main parking system is abnormal, requesting the gear arbitration system to enter a gear degradation mode I;
when the brake control system detects that the power supply voltage of the standby parking system is abnormal, requesting the gear arbitration system to enter a gear degradation mode I;
when the gear executing system or the P gear controller detects that the main power supply and the standby power supply of the main parking system are abnormal, if the vehicle is in a P gear out-of-gear state at the moment, the gear arbitrating system is requested to enter a gear degradation mode II;
When the gear executing system or the P gear controller detects that the main power supply and the standby power supply of the main parking system are abnormal, if the vehicle is in the P gear locking state at the moment, the parking state is maintained, and the driver is prompted that the parking system needs to be maintained.
Specifically, the first gear degradation mode includes that the requested gear display system prompts a driver that a parking system has a fault, and when the driver requests a P gear, the requested gear execution system P gear is combined with the requested brake control system EPB; when the power supply is abnormal and maintains a certain driving cycle, and when a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system P gear to be combined with the brake control system EPB and does not allow release. And after the power supply is abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
Specifically, the gear degradation mode II comprises the steps that the requested gear display system prompts a driver that a serious fault exists in the parking system, and the requested gear execution system N is combined with the requested brake control system EPB when the driver requests the P gear; when the main power supply and the standby power supply abnormally maintain a certain driving cycle, and a driver requests a P gear, the gear arbitration system requests the gear display system to prompt the driver that the parking system needs to be maintained, and simultaneously requests the gear execution system N gear to be combined with the brake control system EPB and does not allow release. And after the main power supply and the standby power supply are abnormally eliminated for a certain driving cycle, the system is restored to normal operation.
In practical application, the main power supply and the standby power supply are input into the gear executing system and the P gear controller in a parallel connection mode, and the voltage states of the main power supply and the standby power supply can be monitored by using the total power supply voltage monitoring.
For example, during normal driving of the vehicle, the gear executing system detects a failure of the main power supply, and obviously, the gear executing system continues to work by using the standby power supply at this time, and the gear executing system requests the gear arbitrating system to enter a gear degradation mode one. The gear arbitration system sets the faulty driving cycle counter according to the fault state reported by the gear execution system every driving cycle. If the fault persists, the fault-present driving cycle counter value is incremented. If the fault completes repair, the fault present driving cycle counter value is decremented. The gear arbitration system judges the gear working state of the current system according to the fault state reported by the gear execution system and the driving cycle counter with the fault. If the fault-present driving cycle counter value reaches the upper limit, the gear arbitration system will request the gear execution system P to engage with the brake control system EPB and not allow release. If the fault exists with a driving cycle counter value between 0 and an upper limit, the gear arbitration system will request to enter a gear degradation mode according to the fault type. If the fault-present drive cycle counter value reaches 0, the gear arbitration system will respond correctly to the driver gear input.
In summary, in the power supply monitoring of the parking system, whether the main power supply of the parking system is abnormal or the standby power supply is abnormal or both the main power supply and the standby power supply are abnormal, the parking system can be diagnosed and enters a safe state, and potential hazard is prevented.
The foregoing describes in detail a method for monitoring and disabling a power supply of a parking system according to an embodiment of the present invention, and the principles and embodiments of the present invention are explained herein, which is only used to help understand the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the detailed description and the application scope in accordance with the idea of the present invention, the present description should not be construed as limiting the present invention.
Claims (11)
1. The power supply monitoring and failure processing method for the parking system of the vehicle comprises a main parking system and a standby parking system, wherein the power supply monitoring and failure processing method comprises the following steps:
a) When detecting that the power supply of the parking system is partially abnormal, requesting to enter a gear degradation mode I by a gear arbitration system;
b) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is not in a parking state at the moment, the gear arbitration system requests to enter a gear degradation mode II;
c) When the serious abnormality of the power supply of the parking system is detected, if the vehicle is in the parking state at this time, the gear arbitration system maintains the parking state and prompts a driver that the parking system needs maintenance.
2. The power supply monitoring and failure processing method according to claim 1, wherein the abnormality of the power supply occurrence portion of the parking system includes one of:
the standby power supply voltage of the main parking system is abnormal;
the main power supply voltage of the main parking system is abnormal;
And the power supply voltage of the standby parking system is abnormal.
3. The power supply monitoring and failure processing method according to claim 1, wherein the occurrence of serious abnormality of the power supply of the parking system includes:
and the main power supply voltage and the standby power supply voltage of the main parking system are abnormal.
4. The power supply monitoring and failure handling method according to claim 1, wherein the main parking system includes:
A gear executing system; and
And the gear executing system is connected with the gear executing system, the gear P controller, the gear P motor, the parking mechanism and the gear P sensor.
5. The power supply monitoring and failure handling method according to claim 1, wherein the backup parking system includes:
A brake control system;
The EPB motor is connected with the brake control system, the EPB motor is connected with the brake caliper, and the EPB sensor is connected with the brake caliper; and
Other alternate parking means that can independently provide parking.
6. The power supply monitoring and failure handling method according to claim 1, wherein the gear degradation mode one includes:
when the driver requests a P gear, the parking system requests a P gear and requests EPB engagement; when a driver requests a P gear after a certain driving cycle is abnormally maintained by a power generation part of a parking system, the request instrument system prompts the driver that the parking system needs to be maintained, and meanwhile, the P gear is requested to be executed and the EPB combination is requested and the release is not allowed; after a certain driving cycle is eliminated by partial abnormality of a power supply of the parking system, the parking system is restored to normal operation; gear degradation mode one is a recoverable failure mode.
7. The power supply monitoring and failure handling method according to claim 1, wherein the gear degradation mode two includes:
when the driver requests a P gear, the park system requests an N gear and requests EPB engagement; when a driver requests a P gear after a certain driving cycle is maintained due to serious abnormality of a power supply of the parking system, requesting an instrument system to prompt the driver that the parking system needs to be maintained, and simultaneously requesting to execute N gear and EPB combination and not allowing release; after the serious power supply abnormality eliminates a certain driving cycle, the parking system resumes normal operation; the gear degradation mode two is a recoverable failure mode.
8. The power supply monitoring and failure handling method according to claim 1, wherein maintaining a parking state includes:
The vehicle maintains a P-range engaged state, which is an unrecoverable failure mode, and does not respond to any shift request by the driver.
9. The power supply monitoring and failure processing method according to claim 1, wherein prompting the driver that the parking system needs maintenance includes the following prompting means:
the instrument panel screen text prompt information, the warning tone and the vibration.
10. The power supply monitoring and failure handling method of claim 1, wherein the power supply failure conditions include, but are not limited to:
the related power supply voltage value exceeds a specified range, a voltage module for monitoring power supply voltage abnormality and an ADC module fault.
11. A power supply monitoring and failure processing system for a parking system of a vehicle, wherein the power supply monitoring and failure processing system is configured to perform the power supply monitoring and failure processing method according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314534.2A CN117962839A (en) | 2022-10-25 | 2022-10-25 | Power supply monitoring and failure processing method for parking system of vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314534.2A CN117962839A (en) | 2022-10-25 | 2022-10-25 | Power supply monitoring and failure processing method for parking system of vehicle |
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| CN117962839A true CN117962839A (en) | 2024-05-03 |
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| CN202211314534.2A Pending CN117962839A (en) | 2022-10-25 | 2022-10-25 | Power supply monitoring and failure processing method for parking system of vehicle |
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| CN (1) | CN117962839A (en) |
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- 2022-10-25 CN CN202211314534.2A patent/CN117962839A/en active Pending
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