Control method and device for motor-driven turn-off circuit of front cabin cover of vehicle

Abstract

The invention discloses a control method and device for a motor-driven turn-off circuit of a vehicle front hatch cover, the control method and device are applied to a controller, the controller comprises the motor-driven turn-off circuit of the front hatch cover and a motor-driven circuit of the front hatch cover, and the method comprises the steps that when a control instruction of the front hatch cover is received, the motor-driven turn-off circuit of the front hatch cover in a turn-off state is closed; after the front hatch cover motor drive turn-off circuit is closed, the front hatch cover motor circuit drive is controlled to be conducted, so that a front hatch cover is opened; and after the front hatch cover is opened, the front hatch cover motor driving turn-off circuit is turned off. The front hatch cover is opened only when the front hatch cover motor-driven turn-off circuit has an adhesion fault and the front hatch cover motor-driven turn-off circuit and the front hatch cover motor-driven circuit have adhesion faults at the same time, however, the front hatch cover is maintained when the front hatch cover motor-driven turn-off circuit has adhesion faults or the front hatch cover motor-driven circuit has adhesion faults, and the situation that the front hatch cover is opened by mistake is avoided. Therefore, the risk of accidents is reduced.

Description

Technical Field

[0001] The present application relates to the field of automotive electronic technology, and in particular to a control method and device for a vehicle hood motor drive shutdown circuit. Background Art

[0002] The car hood motor drive shutdown circuit is an important safety system on the car. It is responsible for controlling the opening and closing of the hood and cutting off the power supply when necessary to ensure safety.

[0003] The existing hood motor drive shutdown circuit is normally closed and will not be disconnected until the controller diagnoses a hood motor drive circuit adhesion fault. However, when the hood motor drive circuit adhesion fault occurs, it will directly lead to unexpected system output current, causing the hood to open, thereby affecting the driver's vision and increasing the risk of accidents.

[0004] Therefore, how to reduce the risk of accidents has become an urgent problem to be solved in this field. Summary of the invention

[0005] The present application provides a method and device for controlling a vehicle hood motor drive shutdown circuit, the purpose of which is to reduce the risk of accidents.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A control method for a vehicle hood motor drive shutdown circuit is applied to a controller, wherein the controller includes a hood motor drive shutdown circuit and a hood motor drive circuit, including:

[0008] When a front hatch cover control instruction is received, the front hatch cover motor driving shutdown circuit in the disconnected state is closed; the front hatch cover control instruction indicates an instruction to control the front hatch cover to open;

[0009] When the front hatch cover motor drive shutdown circuit is closed, the front hatch cover motor circuit is controlled to be driven on so as to open the front hatch cover;

[0010] When the front hatch cover is opened, the front hatch cover motor drive shutoff circuit is disconnected.

[0011] Optionally, also include:

[0012] When the front hatch motor drive shutdown circuit is in an off state, detecting whether a front hatch control instruction is received within a preset time period;

[0013] If the front hatch cover control command is not received within the preset time period, detecting whether the front hatch cover motor drive shutdown circuit has a sticking fault through the self-checking circuit of the front hatch cover motor drive shutdown circuit;

[0014] If the front hood motor drive shutoff circuit has a adhesion fault, prompt information of the front hood motor drive shutoff circuit adhesion fault is sent to the user.

[0015] Optionally, detecting whether the front hatch motor drive shutdown circuit has a sticking fault by using a self-check circuit of the front hatch motor drive shutdown circuit includes:

[0016] The voltage of the front hatch cover motor drive shutdown circuit is collected through the self-test circuit of the front hatch cover motor drive shutdown circuit;

[0017] Detecting whether the voltage is greater than a preset voltage;

[0018] If the voltage is not greater than the preset voltage, it is determined that the front hatch motor drive is turned off and short-circuited without adhesion fault;

[0019] If the voltage is greater than the preset voltage, it is determined that the front hatch motor drive is turned off due to a short circuit and adhesion fault.

[0020] Optionally, also include:

[0021] When the front hatch motor drive shutdown circuit is in an off state, detecting whether a front hatch control instruction is received within a preset time period;

[0022] If the front hatch cover control command is not received within the preset time period, detecting whether the front hatch cover motor drive circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive circuit;

[0023] If the front hatch motor driving circuit has an adhesion fault, prompt information of the front hatch motor driving circuit adhesion fault is sent to the user.

[0024] Optionally, also include:

[0025] If the front hatch motor drive circuit has no adhesion fault, continue to detect whether a front hatch control command is received within the next preset time period;

[0026] If the front hatch cover control command is received within the next preset time period, the process returns to the step of closing the front hatch cover motor drive shutoff circuit in the disconnected state when the front hatch cover control command is received.

[0027] A control device for a vehicle front hood motor drive shutoff circuit, comprising:

[0028] a closing unit, configured to close the front hatch motor drive shutoff circuit in an open state when receiving a front hatch control instruction; the front hatch control instruction indicates an instruction for controlling the front hatch to open;

[0029] A control unit, used for controlling the front hatch cover motor circuit to drive on when the front hatch cover motor drive shutoff circuit is closed, so as to open the front hatch cover;

[0030] A disconnection unit is used to disconnect the front hatch motor drive shutdown circuit when the front hatch is opened.

[0031] Optionally, also include:

[0032] A first detection unit, used for detecting whether a front hatch control instruction is received within a preset time period when the front hatch motor drive shutdown circuit is in an off state;

[0033] a second detection unit, configured to detect whether the front hatch cover motor drive shutdown circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive shutdown circuit if no front hatch cover control command is received within the preset time period;

[0034] The first prompting unit is used to send prompting information of the adhesion fault of the front hood motor driving shut-off circuit to the user if the front hood motor driving shut-off circuit has an adhesion fault.

[0035] Optionally, the second detection unit is specifically used for:

[0036] The voltage of the front hatch cover motor drive shutdown circuit is collected through the self-test circuit of the front hatch cover motor drive shutdown circuit;

[0037] Detecting whether the voltage is greater than a preset voltage;

[0038] If the voltage is not greater than the preset voltage, it is determined that the front hatch motor drive shutoff circuit has no adhesion fault;

[0039] If the voltage is greater than the preset voltage, it is determined that the front hatch motor drive shutoff circuit has a sticking fault.

[0040] Optionally, also include:

[0041] a third detection unit, configured to detect whether a front hatch cover control instruction is received within a preset time period when the front hatch cover motor drive shutdown circuit is in an off state;

[0042] a fourth detection unit, configured to detect whether the front hatch cover motor drive circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive circuit if no front hatch cover control command is received within the preset time period;

[0043] The second prompting unit is configured to send prompting information of the front hood motor driving circuit adhesion failure to the user if the front hood motor driving circuit has an adhesion failure.

[0044] Optionally, also include:

[0045] a fifth detection unit, configured to continue to detect whether a front hatch cover control instruction is received within a next preset time period if the front hatch cover motor drive circuit has no adhesion failure;

[0046] The returning unit is used for returning to the step of closing the front hatch motor drive shutoff circuit in the disconnected state when the front hatch control command is received within the next preset time period if the front hatch control command is received within the next preset time period.

[0047] The technical solution provided by the present application is applied to a controller, and the controller includes a hood motor drive shutdown circuit and a hood motor drive circuit. When a hood control instruction is received, the hood motor drive shutdown circuit in the disconnected state is closed; after the hood motor drive shutdown circuit is closed, the hood motor circuit is controlled to drive on so that the hood is opened; after the hood is opened, the hood motor drive shutdown circuit is disconnected. The hood will only be opened when the hood motor drive shutdown circuit has an adhesion failure and the hood motor drive circuit has an adhesion failure at the same time. However, when the hood motor drive shutdown circuit has an adhesion failure or the hood motor drive circuit has an adhesion failure, repairs have been carried out, and the hood will not be opened by mistake, thereby reducing the risk of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A flow chart of a method for controlling a vehicle front hood motor drive shutdown circuit provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the architecture of a controller provided in an embodiment of the present application;

[0051] Figure 3 A flow chart of a method for detecting a front hood motor drive shutdown circuit provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of the architecture of another controller provided in an embodiment of the present application;

[0053] Figure 5 A flow chart of a method for detecting a front hood motor drive shutdown circuit provided in an embodiment of the present application;

[0054] Figure 6 A flow chart of a method for detecting a front hood motor drive circuit provided in an embodiment of the present application;

[0055] Figure 7 A schematic diagram of a fault handling time interval provided in an embodiment of the present application;

[0056] Figure 8 A schematic diagram of the architecture of a control device for a vehicle hood motor drive shutdown circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0058] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0059] like Figure 1 As shown, it is a flow chart of a control method of a vehicle front hood motor drive shutdown circuit provided by an embodiment of the present application, which is applied to a controller, and the controller includes a front hood motor drive shutdown circuit and a front hood motor drive circuit, including:

[0060] It should be noted that the schematic diagram of the controller architecture is as follows: Figure 2 As shown, a power supply (such as a battery) is connected to a front hatch motor drive shutdown circuit and a front hatch motor drive circuit in a controller, and an output end of the controller is connected to an input end of the motor. The front hatch motor drive shutdown circuit and the front hatch motor drive circuit are in series.

[0061] S101: When a front hatch control command is received, a front hatch motor drive shutoff circuit that is in an off state is closed.

[0062] The front hatch control instruction indicates an instruction for controlling the opening of the front hatch.

[0063] It should be noted that when the controller is powered on, the controller will disconnect the front hood motor drive shutdown circuit. Therefore, the initial state of the front hood motor drive shutdown circuit is the disconnected state. If no front hood control command is received, the front hood motor drive shutdown circuit will continue to remain in the disconnected state.

[0064] It is understandable that when the controller is powered on, the front hood motor drive shutdown circuit is in an open state. At this time, when a front hood control instruction is received and the front hood needs to be opened, the front hood drive circuit in the open state is closed first to facilitate subsequent control of the front hood opening.

[0065] Optionally, before step S101, it is necessary to periodically detect whether the front hood motor drive shutdown circuit has a sticking fault. Through regular detection, the circuit sticking problem can be discovered and handled in time to ensure the normal operation of the front hood and improve the safety and reliability of the vehicle. Therefore, in another embodiment of the present application, a method for detecting the front hood motor drive shutdown circuit is provided, such as Figure 3 As shown, the following steps are included:

[0066] S301: When the front hatch motor drive shutdown circuit is in an off state, detecting whether a front hatch control instruction is received within a preset time period.

[0067] If the front hatch control command is not received within the preset time period, step S302 is executed.

[0068] Optionally, the preset time period includes but is not limited to: an ignition cycle (referring to the time interval from the start of ignition to the start of the next ignition).

[0069] It can be understood that when the current hatch cover motor drive shutdown circuit is in the disconnected state, it is detected whether the front hatch cover control command is received within a preset time period (for example, within an ignition cycle); if the front hatch cover control command is not received, the front hatch cover motor drive shutdown circuit is kept in the disconnected state; if the front hatch cover control command is received, it returns to execute step S101.

[0070] S302: Detecting whether the front hatch motor drive shutoff circuit has a sticking fault through a self-check circuit of the front hatch motor drive shutoff circuit.

[0071] If the front hood motor drive shut-off circuit has a sticking fault, step S303 is executed.

[0072] Optional, see Figure 4, is a schematic diagram of the architecture of another controller, the controller also includes: a self-test circuit of a front hood motor drive shutdown circuit and a self-test circuit of a front hood motor drive circuit, the output end of the front hood motor drive shutdown circuit is connected to the input end of the self-test circuit of the front hood motor drive shutdown circuit; the output end of the front hood motor drive circuit is connected to the input end of the self-test circuit of the front hood motor drive circuit.

[0073] It can be understood that, through the self-test circuit of the front bonnet motor drive shutdown circuit, it is detected whether the front bonnet motor drive shutdown circuit has a adhesion fault. Specifically, through the self-test circuit of the front bonnet motor drive shutdown circuit, relevant information of the front bonnet motor drive shutdown circuit is collected, and it is determined whether the front bonnet motor drive shutdown circuit has a adhesion fault through the relevant information.

[0074] If the front hood motor drive shut-off circuit has no adhesion fault, continue to detect whether the front hood control command is received within the next preset time period. If the front hood control command is received within the next preset time period, return to step S101.

[0075] Optionally, in another embodiment of the present application, the specific implementation of step S302 is as follows: Figure 5 As shown, the following steps are included:

[0076] S501: collecting the voltage of the front hatch motor drive shutdown circuit through the self-test circuit of the front hatch motor drive shutdown circuit.

[0077] It is understandable that the voltage of the front bonnet motor drive shutdown circuit is collected through the self-test circuit of the front bonnet motor drive shutdown circuit, so as to subsequently determine whether the front bonnet motor drive shutdown circuit has a adhesion fault based on the voltage of the front bonnet motor drive shutdown circuit.

[0078] S502: Detect whether the voltage is greater than a preset voltage.

[0079] If the voltage is not greater than the preset voltage, step S503 is executed; if the voltage is greater than the preset voltage, step S504 is executed.

[0080] Optionally, the preset voltage includes but is not limited to: 0V.

[0081] Specifically, assuming that the voltage is 0V and the preset voltage is 0V, it is detected whether the voltage is greater than the preset voltage. Obviously, the voltage is not greater than the preset voltage, so step S503 is continued.

[0082] Specifically, assuming that the voltage is 0.3V and the preset voltage is 0V, it is detected whether the voltage is greater than the preset voltage. Obviously, the voltage is greater than the preset voltage, so step S504 is continued.

[0083] S503: Determine that there is no adhesion fault in the front hood motor drive shutoff circuit.

[0084] It can be understood that since the front hood motor drive shutdown circuit is in the disconnected state, the voltage of the front hood motor drive shutdown circuit is 0V. If the voltage of the front hood motor drive shutdown circuit is 0V at this time, it means that the front hood motor drive shutdown short circuit is not a sticking fault.

[0085] S504: It is determined that the front hood motor drive shutoff circuit has a adhesion fault.

[0086] It can be understood that since the front hood motor drive shutdown circuit is in the disconnected state, the voltage of the front hood motor drive shutdown circuit is 0V. If the voltage of the front hood motor drive shutdown circuit is not 0V, it means that the front hood motor drive shutdown short circuit adhesion fault occurs at this time.

[0087] S303: Sending a prompt message of the adhesion fault of the front hood motor drive shutoff circuit to the user.

[0088] It is understandable that the prompt information of the adhesion fault of the front hood motor drive shutoff circuit is sent to the user, prompting the user to repair the front hood motor drive shutoff circuit.

[0089] Optionally, before step S101, it is also necessary to periodically detect whether the front hatch motor drive circuit has a sticking fault. By regularly detecting the front hatch motor drive circuit, the front hatch motor drive circuit adhesion problem can be discovered and handled in time to ensure that the front hatch will not be opened by mistake, thereby improving the safety and reliability of the vehicle. Therefore, in another embodiment of the present application, a method for detecting the front hatch motor drive circuit is provided, such as Figure 6 As shown, the following steps are included:

[0090] S601: When the hatch cover motor drive shutdown circuit is in an off state, it is detected whether a front hatch cover control instruction is received within a preset time period.

[0091] If no front hatch control command is received within the preset time period, step S602 is executed.

[0092] It should be noted that the specific implementation of step S601 may refer to step S301 accordingly and will not be described in detail here.

[0093] S602: Detect whether the front hatch motor drive circuit has a sticking fault through the self-test circuit of the front hatch motor drive circuit.

[0094] If the front hood motor driving circuit has a adhesion fault, step S603 is executed.

[0095] It can be understood that, through the self-test circuit of the front hood motor drive circuit, it is detected whether the front hood motor drive circuit has a adhesion fault. Specifically, through the self-test circuit of the front hood motor drive circuit, the voltage of the front hood motor drive circuit is collected to detect whether the voltage is greater than a preset voltage. If the voltage is not greater than the preset voltage, it is determined that the front hood motor drive circuit has no adhesion fault. If the voltage is greater than the preset voltage, it is determined that the front hood motor drive circuit has a adhesion fault.

[0096] Optionally, after step S602, the method further includes:

[0097] If the front hatch motor drive circuit has no adhesion fault, continue to detect whether a front hatch control command is received within the next preset time period.

[0098] It is understandable that if the front hood motor drive circuit does not have a sticking fault, it means that no sticking fault is detected within the preset time period, and the front hood control command is continuously detected within the next preset time period. For example, if no sticking fault is detected within the ignition cycle, the front hood control command is continuously detected within the next ignition cycle.

[0099] If the front hatch control command is received within the next preset time period, the process returns to step S101 .

[0100] S603: Sending a prompt message of the adhesion fault of the front hood motor drive circuit to the user.

[0101] It should be noted that the specific implementation of step S603 may refer to step S303 accordingly, and will not be repeated here.

[0102] It should be noted that when the hood control command is not received, if the hood motor drive circuit has a adhesion fault, it will not cause unexpected system output, thereby opening the hood. Because the hood motor drive shutdown circuit is in a disconnected state, there will be no current output. Only when the hood motor drive shutdown circuit adhesion fault and the hood drive circuit adhesion fault occur at the same time, will it cause unexpected system output, thereby opening the hood. Therefore, the hood motor drive shutdown circuit adhesion fault and the hood motor drive circuit adhesion fault are double-point faults. By changing the initial state of the hood motor drive shutdown circuit, the hood motor drive circuit adhesion fault is transformed from a single-point fault to a double-point fault, and does not have to be limited by a shorter fault processing time interval.

[0103] The fault handling interval is the sum of the fault detection interval and the fault response interval. Figure 7 The fault detection interval is the time span from the occurrence of a fault to its detection. The fault response time is the time span from the detection of a fault to the introduction of a safe state.

[0104] A safe state refers to an operating mode in which there is no unreasonable risk. In the embodiment of the present application, the safe state is: the front hood is prohibited from opening. In accordance with the requirements of functional safety standards (such as ISO26262), in order to achieve safety goals, when a single-point fault is detected, it is necessary to ensure that the controller enters a safe state within the fault handling time interval. If a single-point fault is converted into a double-point fault, the failure rate will be greatly reduced, and there is no need to import a safe state within the fault handling time interval (in the concept of functional safety, a single-point fault means that safety will be affected after the fault occurs, and a safe state needs to be imported within the specified fault handling time interval. A double-point fault means that two faults must occur at the same time to affect safety. After one of the faults occurs, there is no need to import a safe state). According to the requirements of the functional safety standard, the detection cycle of a double-point fault is one ignition cycle.

[0105] S102: After the front hatch cover motor drive shutdown circuit is closed, the front hatch cover motor circuit is controlled to be turned on to open the front hatch cover.

[0106] It is understandable that after the front hatch cover motor drive shutdown circuit is closed, it is also necessary to control the front hatch cover motor circuit drive conduction to complete the front hatch cover opening action.

[0107] S103: After the front hatch is opened, the front hatch motor drive shutdown circuit is disconnected.

[0108] It is understandable that after the front hood is opened, in order to prevent the front hood from being opened by mistake and affecting driving safety, the front hood motor drive shutdown circuit needs to be disconnected so that the front hood motor drive shutdown circuit remains disconnected when no front hood control command is received.

[0109] To summarize, by changing the initial state of the hood motor drive shutdown circuit, the hood motor drive shutdown circuit remains in the disconnected state when no hood control command is received. The hood will only open when the hood motor drive shutdown circuit has a adhesion failure and the hood motor drive circuit has a adhesion failure at the same time. However, when the hood motor drive shutdown circuit has a adhesion failure or the hood motor drive circuit has a adhesion failure, repairs have been carried out and the hood will not be opened accidentally. Therefore, the risk of accidents is reduced.

[0110] like Figure 8 , which is a schematic diagram of the architecture of a control device for a vehicle hood motor drive shutdown circuit provided in an embodiment of the present application, the control device includes: a closing unit 100, a control unit 200 and a disconnection unit 300.

[0111] The closing unit 100 is used to close the front hatch motor drive shutoff circuit in the disconnected state when receiving a front hatch control instruction; the front hatch control instruction indicates an instruction to control the front hatch to open.

[0112] The control unit 200 is used to control the front hatch cover motor circuit to be turned on after the front hatch cover motor drive shutdown circuit is closed, so as to open the front hatch cover.

[0113] The disconnection unit 300 is used to disconnect the front hatch motor drive shutoff circuit when the front hatch is opened.

[0114] To summarize, by changing the initial state of the hood motor drive shutdown circuit, the hood motor drive shutdown circuit remains in the disconnected state when no hood control command is received. The hood will only open when the hood motor drive shutdown circuit has a adhesion failure and the hood motor drive circuit has a adhesion failure at the same time. However, when the hood motor drive shutdown circuit has a adhesion failure or the hood motor drive circuit has a adhesion failure, repairs have been carried out and the hood will not be opened accidentally. Therefore, the risk of accidents is reduced.

[0115] Preferably, combined Figure 8 As shown in the content, the control device also includes: a first detection unit, a second detection unit and a first prompt unit.

[0116] The first detection unit is used to detect whether a front hatch cover control instruction is received within a preset time period when the front hatch cover motor drive shutdown circuit is in an off state.

[0117] The second detection unit is used to detect whether the front hatch motor drive shutdown circuit has a sticking fault through the self-check circuit of the front hatch motor drive shutdown circuit if the front hatch control command is not received within a preset time period.

[0118] The second detection unit is specifically used to: collect the voltage of the front hood motor drive shutdown circuit through the self-test circuit of the front hood motor drive shutdown circuit; detect whether the voltage is greater than a preset voltage; if the voltage is not greater than the preset voltage, determine that the front hood motor drive shutdown circuit has no adhesion fault; if the voltage is greater than the preset voltage, determine that the front hood motor drive shutdown circuit has an adhesion fault.

[0119] The first prompting unit is used to send prompting information of the front hatch motor driving shutoff circuit adhesion fault to the user if the front hatch motor driving shutoff circuit adhesion fault occurs.

[0120] Preferably, combined Figure 8 As shown in the content, the control device also includes: a third detection unit, a fourth detection unit and a second prompt unit.

[0121] The third detection unit is used to detect whether a front hatch cover control instruction is received within a preset time period when the hatch cover motor drive shutdown circuit is in an off state.

[0122] The fourth detection unit is used to detect whether the front hatch motor drive circuit has an adhesion fault through a self-detection circuit of the front hatch motor drive circuit if no front hatch control command is received within a preset time period.

[0123] The second prompting unit is used to send prompting information of the front hatch motor driving circuit adhesion fault to the user if the front hatch motor driving circuit has an adhesion fault.

[0124] Preferably, combined Figure 8 As shown in the content, the control device also includes: a fifth detection unit and a return unit.

[0125] a fifth detection unit, configured to continue to detect whether a front hatch cover control instruction is received within a next preset time period if the front hatch cover motor drive circuit has no adhesion failure;

[0126] The return unit is used to return to the step of closing the front hatch motor drive shutoff circuit in the disconnected state when the front hatch control command is received within the next preset time period if the front hatch control command is received.

[0127] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0128] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0129] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a vehicle front hood motor drive shutdown circuit, characterized in that: Applied to a controller, the controller includes a front hatch motor drive shutdown circuit and a front hatch motor drive circuit, including: When a front hatch cover control instruction is received, the front hatch cover motor driving shutdown circuit in the disconnected state is closed; the front hatch cover control instruction indicates an instruction to control the front hatch cover to open; When the front hatch cover motor drive shutdown circuit is closed, the front hatch cover motor circuit is controlled to be driven on so as to open the front hatch cover; When the front hatch cover is opened, the front hatch cover motor drive shutoff circuit is disconnected.

2. The method according to claim 1, characterized in that Also includes: When the front hatch motor drive shutdown circuit is in an off state, detecting whether a front hatch control instruction is received within a preset time period; If the front hatch cover control command is not received within the preset time period, detecting whether the front hatch cover motor drive shutdown circuit has a sticking fault through the self-checking circuit of the front hatch cover motor drive shutdown circuit; If the front hood motor drive shutoff circuit has a adhesion fault, prompt information of the front hood motor drive shutoff circuit adhesion fault is sent to the user.

3. The method according to claim 2, characterized in that The self-checking circuit of the front hatch motor driving shut-off circuit is used to detect whether the front hatch motor driving shut-off circuit has a sticking fault, including: The voltage of the front hatch cover motor drive shutdown circuit is collected through the self-test circuit of the front hatch cover motor drive shutdown circuit; Detecting whether the voltage is greater than a preset voltage; If the voltage is not greater than the preset voltage, it is determined that the front hatch motor drive is turned off and short-circuited without adhesion fault; If the voltage is greater than the preset voltage, it is determined that the front hatch motor drive is turned off due to a short circuit and adhesion fault.

4. The method according to claim 1, characterized in that: Also includes: When the front hatch motor drive shutdown circuit is in an off state, detecting whether a front hatch control instruction is received within a preset time period; If the front hatch cover control command is not received within the preset time period, detecting whether the front hatch cover motor drive circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive circuit; If the front hatch motor driving circuit has an adhesion fault, prompt information of the front hatch motor driving circuit adhesion fault is sent to the user.

5. The method according to claim 4, characterized in that Also includes: If the front hatch motor drive circuit has no adhesion fault, continue to detect whether a front hatch control command is received within the next preset time period; If the front hatch cover control command is received within the next preset time period, the process returns to the step of closing the front hatch cover motor drive shutoff circuit in the disconnected state when the front hatch cover control command is received.

6. A control device for a vehicle front hood motor drive shut-off circuit, characterized in that: include: A closing unit, configured to close the front hatch motor drive shutoff circuit in an open state when receiving a front hatch control instruction; The front hatch control instruction indicates an instruction for controlling the front hatch to open; A control unit, used for controlling the front hatch cover motor circuit to drive on when the front hatch cover motor drive shutoff circuit is closed, so as to open the front hatch cover; A disconnection unit is used to disconnect the front hatch motor drive shutdown circuit when the front hatch is opened.

7. The device according to claim 6, characterized in that Also includes: A first detection unit, used for detecting whether a front hatch control instruction is received within a preset time period when the front hatch motor drive shutdown circuit is in an off state; a second detection unit, configured to detect whether the front hatch cover motor drive shutoff circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive shutoff circuit if no front hatch cover control command is received within the preset time period; The first prompting unit is used to send prompting information of the adhesion fault of the front hood motor driving shut-off circuit to the user if the front hood motor driving shut-off circuit has an adhesion fault.

8. The device according to claim 7, characterized in that The second detection unit is specifically used for: The voltage of the front hatch cover motor drive shutdown circuit is collected through the self-test circuit of the front hatch cover motor drive shutdown circuit; Detecting whether the voltage is greater than a preset voltage; If the voltage is not greater than the preset voltage, it is determined that the front hatch motor drive shutoff circuit has no adhesion fault; If the voltage is greater than the preset voltage, it is determined that the front hatch motor drive shutoff circuit has a sticking fault.

9. The device according to claim 6, characterized in that Also includes: a third detection unit, configured to detect whether a front hatch cover control instruction is received within a preset time period when the front hatch cover motor drive shutdown circuit is in an off state; a fourth detection unit, configured to detect whether the front hatch cover motor drive circuit has a sticking fault through a self-checking circuit of the front hatch cover motor drive circuit if no front hatch cover control command is received within the preset time period; The second prompting unit is configured to send prompting information of the front hood motor driving circuit adhesion failure to the user if the front hood motor driving circuit has an adhesion failure.

10. The device according to claim 9, characterized in that Also includes: a fifth detection unit, configured to continue to detect whether a front hatch cover control instruction is received within a next preset time period if the front hatch cover motor drive circuit has no adhesion failure; The returning unit is used for returning to the step of closing the front hatch motor drive shutoff circuit in the disconnected state when the front hatch control command is received within the next preset time period if the front hatch control command is received within the next preset time period.

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