Method for controlling fuel injection nozzles in a vehicle, vehicle and electronic device

Abstract

The application discloses a control method of an injection nozzle in a vehicle. The method comprises the following steps: obtaining a circuit signal of a driving circuit of the injection nozzle during driving of the vehicle, wherein the circuit signal is used to represent a connection state between multiple components in the driving circuit; determining a fault type of the driving circuit in an abnormal connection state in response to the circuit signal representing that the connection state is the abnormal connection state; determining a driving channel for driving the injection nozzle from the multiple components based on the fault type; and controlling the driving channel to send a driving control signal to the injection nozzle to control the injection nozzle to perform an injection operation. The application solves the technical problem of low control accuracy of the injection nozzle in the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicles, and more specifically, to a method for controlling fuel injectors in a vehicle, a vehicle, and electronic equipment. Background Technology

[0002] Currently, when a fault occurs in the drive circuit of the multi-cylinder bank drive system of the fuel injectors in a vehicle, the relevant technology mainly deals with the fault by shutting down the entire drive circuit of the system. However, shutting down the entire drive circuit by the above method will result in the inability to accurately control the fuel injectors in the cylinder bank to perform fuel injection operations.

[0003] Therefore, the technical problem of low control accuracy of fuel injectors in vehicles still exists.

[0004] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0005] This application provides a method for controlling fuel injectors in a vehicle, a vehicle, and an electronic device to at least solve the technical problem of low control accuracy of fuel injectors in a vehicle.

[0006] According to one aspect of the embodiments of this application, a method for controlling a fuel injector in a vehicle is provided. The method may include: during vehicle operation, acquiring a circuit signal of a drive circuit for the fuel injector, wherein the circuit signal indicates the connection state between multiple components in the drive circuit; in response to the circuit signal indicating an abnormal connection state, determining the fault type of the fault occurring in the drive circuit under the abnormal connection state; based on the fault type, determining a drive channel for driving the fuel injector from among the multiple components; and controlling the drive channel to send a drive control signal to the fuel injector to control the fuel injector to perform a fuel injection operation.

[0007] Optionally, in response to the circuit signal indicating an abnormal connection state, determining the fault type of the fault that occurs in the drive circuit under the abnormal connection state includes: in response to the circuit signal indicating an abnormal connection state, determining the fault type according to the signal type of the circuit signal.

[0008] Optionally, the components include a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. The signal types include a first signal type, a second signal type, and a third signal type. The first signal type indicates the connection status between the high-voltage output terminal and the main drive power supply; the second signal type indicates the connection status between the high-voltage output terminal and the backup drive power supply; and the third signal type indicates the connection status between the low-voltage output terminal and the ground on which the vehicle is traveling. In response to the circuit signal indicating an abnormal connection status, the fault type is determined according to the signal type of the circuit signal, including: in response to the circuit signal being of the first signal type and the circuit signal indicating an abnormal connection status, the fault type is determined to be a high-side high-voltage fault type; in response to the circuit signal being of the second signal type and the circuit signal indicating an abnormal connection status, the fault type is determined to be a high-side battery fault type; and in response to the circuit signal being of the third signal type and the circuit signal indicating an abnormal connection status, the fault type is determined to be a low-side fault type.

[0009] Optionally, based on the fault type, a drive channel for driving the fuel injector is determined from multiple components, including: determining the channel consisting of the low-pressure output terminal and the ground on which the vehicle is traveling as a low-side channel; determining the channel consisting of the high-pressure output terminal and the main drive power supply as a high-pressure channel; and determining the channel consisting of the high-pressure output terminal and the backup drive power supply as a high-side battery channel; in response to a low-side fault type, the high-pressure channel and the high-side battery channel are determined as drive channels; in response to a high-side high-pressure fault type, the low-side channel and the high-side battery channel are determined as drive channels; and in response to a high-side battery fault type, the low-side channel and the high-pressure channel are determined as drive channels.

[0010] Optionally, controlling the drive channel to send a drive control signal to the fuel injector to control the fuel injector to perform a fuel injection operation includes: responding to the drive channel being a low-side channel and a high-side battery channel, using a backup drive power supply to perform a power supply operation on the fuel injector, and using the low-side channel and the high-side battery channel to send a drive control signal to the fuel injector performing the power supply operation; responding to the fuel injector performing the power supply operation receiving the drive control signal, performing an opening operation on the fuel injector according to a preset opening speed, wherein the preset opening speed is less than the opening speed of the opening operation performed using the high-voltage channel and the high-side battery channel, and the preset opening speed is less than the opening speed of the opening operation performed using the low-side channel and the high-voltage channel; responding to the completion of the opening operation on the fuel injector, controlling the fuel injector in the open state to perform a fuel injection operation.

[0011] Optionally, the method further includes: in response to the circuit signal being of a first signal type and the circuit signal indicating an abnormal connection state, controlling the drive circuit to enter a fault mode, wherein the first signal type is used to indicate the connection state between the high-voltage output terminal and the main drive power supply; during the process of the drive circuit being in the fault mode, in response to the circuit signal being in an invalid state, extending the high-side signal pulse width, wherein the extended high-side signal pulse width is used to maintain the drive control signal emitted by the high-side battery channel.

[0012] Optionally, the method further includes: determining a circuit signal acquisition strategy based on the connection relationship between different components, wherein the acquisition strategy is used to represent the correlation relationship of the acquired circuit signals; acquiring the circuit signals of the drive circuit during vehicle operation, including: acquiring the circuit signals according to the acquisition strategy during vehicle control operation.

[0013] Optionally, the components include: a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. Based on the connection relationships between the components, a circuit signal acquisition strategy is determined, including: in response to the existence of a connection relationship between the high-voltage output terminal and the main drive power supply, determining a circuit signal acquisition strategy of a first signal type, wherein the first signal type is used to represent the connection state between the high-voltage output terminal and the main drive power supply; in response to the existence of a connection relationship between the high-voltage output terminal and the backup drive power supply, determining a circuit signal acquisition strategy of a second signal type, wherein the second signal type is used to represent the connection state between the high-voltage output terminal and the backup drive power supply; and in response to the existence of a connection relationship between the low-voltage output terminal and the ground on which the vehicle is traveling, determining a circuit signal acquisition strategy of a third signal type, wherein the third signal type is used to represent the connection state between the low-voltage output terminal and the ground.

[0014] According to another aspect of the embodiments of this application, a control device for a fuel injector in a vehicle is also provided. The device may include: an acquisition unit, configured to acquire circuit signals of the fuel injector's drive circuit during vehicle operation, wherein the circuit signals are used to indicate the connection state between multiple components in the drive circuit; a first determination unit, configured to determine the fault type of the fault occurring in the drive circuit under the abnormal connection state in response to the circuit signals indicating an abnormal connection state; a second determination unit, configured to determine a drive channel for driving the fuel injector from among the multiple components based on the fault type; and a control unit, configured to control the drive channel to send a drive control signal to the fuel injector to control the fuel injector to perform fuel injection operations.

[0015] According to another aspect of the embodiments of this application, a vehicle is also provided, the vehicle including: a memory storing an executable program; and a processor for running the program, wherein the program executes any of the methods in the embodiments of this application when it runs.

[0016] According to another aspect of the embodiments of this application, an electronic device is also provided. This electronic device may include a memory and a processor. The memory may be used to store an executable program. The processor may be used to run the aforementioned executable program, wherein the executable program performs any of the methods described in the embodiments of this application during execution.

[0017] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided. The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method of any one of the embodiments of this application.

[0018] According to another aspect of the embodiments of this application, a processor is also provided. The processor is used to run a program, wherein the program, when running, performs the method of any one of the embodiments of this application.

[0019] According to another aspect of the embodiments of this application, a computer program product is also provided. This computer program product includes a computer program that, when executed by a processor, implements the methods of any one of the embodiments of this application described above.

[0020] In this embodiment, circuit signals between components in the drive circuit are acquired. Fault type identification is performed on drive circuits where the circuit signals indicate an abnormal connection state. Based on the fault type, a drive channel that can still operate normally is determined. A drive control signal is output through the normally operating drive channel to control the fuel injector to perform fuel injection. Since this embodiment handles drive circuit faults specifically for components in the drive circuit with abnormal connection states, and does not shut down the entire drive circuit when a fault is determined by circuit signals, but instead forms a drive circuit with components in normal connection states, the fuel injector's fuel injection function is maintained even when the drive circuit is faulty. Therefore, this overcomes the obstacle in related technologies where uniformly shutting down the entire drive circuit leads to the erroneous shutdown of components in normal connection states and the inability of the fuel injector in the drive circuit to perform fuel injection. This solves the technical problem of low control accuracy of fuel injectors in vehicles, achieving the technical effect of improving the control accuracy of fuel injectors in vehicles. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of a fuel injector control method in a vehicle according to an embodiment of this application;

[0023] Figure 2 This is a flowchart of an injector drive fault protection system according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the internal structure of an injector drive fault protection system according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the internal structure of a logic control module according to an embodiment of this application;

[0026] Figure 5 This is a flowchart of an injector drive fault protection control method according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of a fuel injector control device in a vehicle according to an embodiment of this application. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] According to an embodiment of this application, an embodiment of a method for controlling fuel injectors in a vehicle is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0031] Figure 1 This is a flowchart of a method for controlling fuel injectors in a vehicle according to an embodiment of this application, such as... Figure 1 As shown, the method may include the following steps.

[0032] Step S102: During vehicle operation, acquire the circuit signal of the fuel injector drive circuit.

[0033] In the technical solution provided in step S102 of this application, the aforementioned components may include, but are not limited to: a high-side high-voltage driving transistor, a high-side battery driving transistor, a low-side driving transistor, a high-voltage power supply, and a battery power supply. Specifically, the high-side high-voltage driving transistor can be the drain of a fuel injector high-side metal-oxide-semiconductor field-effect transistor (MOS). The low-side driving transistor can be the source of a fuel injector low-side MOS transistor.

[0034] Optionally, the aforementioned circuit signals can be used to indicate the connection status between multiple components in the drive circuit. For example, the circuit signals can be used to indicate whether the connection status between the components is in a normal connection state or an abnormal connection state. The aforementioned circuit signals can be represented by the voltage change characteristics (e.g., voltage difference) or current change characteristics (e.g., current change value) between the components of the aforementioned drive circuit.

[0035] Optionally, if the circuit signal indicates an abnormal connection state, the circuit signal can be a short-circuit signal. The short-circuit signal can be categorized based on the different components experiencing the abnormal connection state. For example, if the components experiencing the abnormal connection state are a high-side high-voltage drive transistor and a high-voltage power supply, the short-circuit signal can be a high-side high-voltage drive transistor short-circuit signal (also called a high-side high-voltage short-circuit signal). Similarly, if the components experiencing the abnormal connection state are a high-side battery drive transistor and a battery power supply, the short-circuit signal can be a high-side battery drive transistor short-circuit signal (also called a high-side battery short-circuit signal). If the component experiencing the abnormal connection state is a low-side drive transistor, the short-circuit signal can be a low-side drive transistor short-circuit signal (also called a low-side short-circuit signal). The aforementioned drive circuit can be the drive circuit controlling the fuel injector injection timing and fault safety protection in the aforementioned vehicle, or it can be called a fuel injector drive circuit.

[0036] Optionally, during vehicle operation, the circuit signal of the fuel injector drive circuit in the vehicle can be acquired.

[0037] Optionally, if the circuit signal to be acquired is in the form of voltage, the voltage difference between the components in the driving circuit can be monitored by a voltage acquisition module installed between the components in the driving circuit, and the voltage difference can be determined as the circuit signal of the driving circuit.

[0038] For example, a voltage acquisition module, such as a voltage sensor or voltage comparator circuit, can be set between the drain of the high-side MOSFET of the fuel injector and the high-voltage power supply in the aforementioned drive circuit. Through the voltage sensor or voltage comparator circuit, the voltage difference between the high-side high-voltage drive transistor and the high-voltage power supply can be monitored, and this voltage difference can be determined as the circuit signal between the drain of the high-side MOSFET of the fuel injector and the high-voltage power supply.

[0039] Optionally, if the circuit signal to be acquired is in the form of current, the current change value between the components in the driving circuit can be monitored by a current acquisition module installed between the components in the driving circuit, and the current change value can be determined as the circuit signal of the driving circuit.

[0040] For example, a current sampling resistor network can be set between the drain of the high-side MOSFET of the fuel injector and the high-voltage power supply in the above-mentioned drive circuit. The current change value between the high-side high-voltage drive transistor and the high-voltage power supply can be monitored through the current sampling resistor network. The above-mentioned current change value can be determined as the circuit signal of the circuit where the drain of the high-side MOSFET of the fuel injector and the high-voltage power supply are located.

[0041] It should be noted that the above-mentioned methods of obtaining the circuit signals of the fuel injector drive circuit through voltage sensors, voltage comparison circuits, or current sampling resistor networks are merely examples, and the embodiments of this application do not impose specific limitations on the methods of obtaining the circuit signals of the drive circuit.

[0042] In this embodiment of the application, the connection status between various components in the driving circuit can be accurately measured by identifying the circuit signals of the driving circuit through the above-mentioned step S102.

[0043] Step S104: In response to the circuit signal indicating that the connection state is abnormal, determine the fault type of the fault that occurs in the drive circuit under the abnormal connection state.

[0044] In the technical solution provided in step S104 of this application, the aforementioned abnormal connection state can be used to indicate an abnormal connection state between different components in the drive circuit. For example, in the fuel injector drive circuit, an unexpected low-resistance path or an abnormal potential clamping electrical state may occur between the high-side high-voltage drive transistor and the power supply terminal or ground terminal. The aforementioned fault type can be used to indicate different types of faults related to the power supply structure of the drive circuit triggered by the aforementioned abnormal connection state. For example, when the aforementioned abnormal connection state occurs between the drain of the high-side MOS transistor of the fuel injector and the high-voltage power supply in the drive circuit, the fault type can be determined to be a high-side high-voltage short-circuit fault.

[0045] Optionally, after acquiring the circuit signal of the fuel injector drive circuit, the fault type of the drive circuit in the abnormal connection state can be determined in response to the circuit signal indicating that the connection state is abnormal.

[0046] Optionally, if the voltage difference approaches zero, or the current change continuously exceeds a preset threshold, the circuit signal indicating an abnormal connection state can be determined. Based on the electrical characteristics of the abnormal connection state, the type of power supply path corresponding to the abnormal connection state is identified, and the fault type corresponding to the type of power supply path is determined. For example, when the circuit signal is a high-side high-voltage short-circuit signal, the fault type can be determined to be a high-side high-voltage short-circuit fault; when the circuit signal is a high-side battery short-circuit signal, the fault type can be determined to be a high-side battery short-circuit fault; when the circuit signal is a low-side short-circuit signal, the fault type can be determined to be a low-side short-circuit fault.

[0047] In this embodiment of the application, the above step S104 can achieve fine classification of various fault types in the drive circuit, ensuring that various faults are logically decoupled at the identification stage.

[0048] Step S106: Based on the fault type, determine the drive channel used to drive the fuel injector from multiple components.

[0049] In the technical solution provided in step S106 of this application, the drive channel can be a power supply path in the drive circuit that is connected to the fuel injector and can still work normally when the drive circuit fails. For example, the drive circuit can include, but is not limited to, a high-side high-voltage drive channel, a high-side battery drive channel, and a low-side channel.

[0050] Optionally, after determining the fault type of the drive circuit, the drive channel for driving the fuel injector can be determined from multiple components based on the fault type.

[0051] Optionally, based on the fault type determined by the above method, the drive channel corresponding to the fault type is shut off, and the drive channel in which the connection state between the components is in the normal connection state is closed, so as to ensure that the fuel injector can still be driven through the drive channel in the normal connection state.

[0052] In this embodiment of the application, step S106 above can ensure that when any drive channel in the drive circuit fails, all drive channels in the drive circuit will not be shut down. Instead, the fuel injector will be controlled to perform fuel injection operation through the drive channel in the drive circuit that has not failed.

[0053] Step S108: Control the drive channel and send a drive control signal to the fuel injector to control the fuel injector to perform fuel injection operation.

[0054] In the technical solution provided in step S108 of this application, the drive control signal can be an electrical signal output to the drive channel corresponding to the fuel injector, such as pulse width modulation (PWM). The drive control signal may include, but is not limited to, drive voltage level, pulse width, duty cycle, and trigger timing information. The drive control signal can be used to control the solenoid valve of the fuel injector to perform opening and closing actions. The fuel injection operation can be the operation whereby the fuel injector, based on the drive control signal, opens the solenoid valve to allow high-pressure fuel to be injected from the injector orifice into the combustion chamber of the vehicle's engine.

[0055] Optionally, after determining the drive channel for driving the fuel injector from multiple components based on the fault type, the drive channel can be controlled to send a drive control signal to the fuel injector to control the fuel injector to perform fuel injection operation.

[0056] Optionally, for drive channels that are not faulty, the drive channel is controlled to send a drive control signal to the fuel injector, so that the fuel injector can still perform injection operation even if there is a fault in the drive circuit. For example, when the high-side high-voltage drive channel in the drive channel is faulty, the high-side battery drive channel can be controlled to extend the pulse width of the drive control signal or increase the duty cycle, and send the drive control signal to the fuel injector to control the fuel injector to perform fuel injection operation.

[0057] In this embodiment, through steps S102 to S108, circuit signals between components in the drive circuit are obtained. Fault type identification is performed on drive circuits where the circuit signals indicate an abnormal connection state. Based on the fault type, a drive channel that can still operate normally is determined. A drive control signal is output through the normally operating drive channel to control the fuel injector to perform fuel injection. Since this embodiment handles drive circuit faults specifically for components in the drive circuit with abnormal connection states, and does not shut down the entire drive circuit when a fault is determined by the circuit signals, but instead uses components in normal connection states to form a drive circuit, the fuel injector's fuel injection function is maintained even when the drive circuit is faulty. Therefore, this overcomes the obstacle in related technologies where uniformly shutting down the entire drive circuit leads to the accidental shutdown of components in normal connection states and the inability of the fuel injector in the drive circuit to perform fuel injection. This solves the technical problem of low control accuracy of fuel injectors in vehicles, achieving the technical effect of improving the control accuracy of fuel injectors in vehicles.

[0058] The method described in this embodiment will be further described below.

[0059] As an optional embodiment, step S104, in response to the circuit signal indicating an abnormal connection state, determines the fault type of the fault that occurs in the drive circuit under the abnormal connection state, including: in response to the circuit signal indicating an abnormal connection state, determining the fault type according to the signal type of the circuit signal.

[0060] In the embodiments of this application, the above-mentioned signal type can be a level signal or edge signal that reflects the abnormal connection state of the driving circuit, such as a high-side high voltage short circuit signal, a high-side battery short circuit signal, and a low-side short circuit signal.

[0061] Optionally, in response to the circuit signal indicating an abnormal connection state, based on the abnormal electrical signal in the circuit signal, the change characteristics of the circuit signal are determined, including but not limited to voltage amplitude, current path and time response. Based on the change characteristics, the nature of the electrical connection abnormality corresponding to the abnormal connection state is inferred, thereby distinguishing the fault types at different physical locations.

[0062] In the embodiments of this application, the above method can identify the type of fault based on the electrical signal characteristics of a single circuit signal, without relying on table lookup operations or external diagnostic models, thus realizing the correspondence between fault type and driving path.

[0063] As an optional embodiment, the components include a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. The signal types include a first signal type, a second signal type, and a third signal type. The first signal type indicates the connection state between the high-voltage output terminal and the main drive power supply; the second signal type indicates the connection state between the high-voltage output terminal and the backup drive power supply; and the third signal type indicates the connection state between the low-voltage output terminal and the ground on which the vehicle is traveling. In response to a circuit signal indicating an abnormal connection state, the fault type is determined according to the signal type of the circuit signal, including: in response to the circuit signal being of the first signal type and the circuit signal indicating an abnormal connection state, determining the fault type as a high-side high-voltage fault; in response to the circuit signal being of the second signal type and the circuit signal indicating an abnormal connection state, determining the fault type as a high-side battery fault; and in response to the circuit signal being of the third signal type and the circuit signal indicating an abnormal connection state, determining the fault type as a low-side fault.

[0064] In this embodiment, the high-voltage output terminal can be a node in the drive circuit connected to the high-potential terminal of the fuel injector solenoid valve, such as the drain of the high-side MOSFET of the fuel injector. The low-voltage output terminal can be a node in the drive circuit connected to the low-potential terminal of the fuel injector solenoid valve, such as the source of the low-side MOSFET of the fuel injector. The main drive power supply can be a high-voltage power supply generated by a boost circuit, such as a high-voltage power supply. The backup drive power supply can be the power directly supplied by the vehicle's battery. The first signal type can be used to indicate the connection status between the high-voltage output terminal and the main drive power supply, such as a high-voltage high-side short-circuit signal. The second signal type can be used to indicate the connection status between the high-voltage output terminal and the backup drive power supply, such as a high-side battery short-circuit signal. The third signal type can be used to indicate the connection status between the low-voltage output terminal and the ground on which the vehicle is traveling, such as a low-side short-circuit signal. The high-side high-voltage fault type can be used to indicate that a direct short circuit occurs between the high-voltage power supply path and the ground on which the vehicle is traveling, causing the fuel injector to fail to open via high-voltage drive, but the battery power supply path remains normal. The high-side battery fault type described above indicates an abnormal connection between the battery power supply path and the high-voltage output terminal, resulting in limited high-voltage drive function, but the high-voltage power supply side is unaffected. The low-side fault type described above indicates an abnormally low-resistance path is formed between the fuel injector ground terminal and the ground on which the vehicle is traveling, causing low-side control failure, but the high-side drive voltage can still be established normally.

[0065] Optionally, in response to the circuit signal being of the first signal type, and the circuit signal indicating an abnormal connection state, i.e., the connection state between the high-voltage output terminal and the main drive power supply is abnormal, the voltage of the high-voltage output terminal is detected to remain at the level of the main drive power supply during the absence of a drive control signal. At the same time, the current in the ground path of the high-voltage output terminal increases abnormally and does not decay as the control signal is turned off, indicating that an abnormal low-resistance path is formed between the high-voltage output terminal and the main drive power supply, while the voltage of the backup drive power supply remains normal. It can be determined that a direct short circuit has occurred between the high-voltage power supply path and the ground on which the vehicle is traveling, and the fault type is a high-side high-voltage fault type.

[0066] Optionally, in response to the circuit signal being of the second signal type, and the circuit signal indicating an abnormal connection state, i.e., the connection state between the high-voltage output terminal and the backup drive power supply is abnormal, the voltage of the high-voltage output terminal is detected to be abnormally pulled down to the backup drive power supply level, and this state continues to exist when there is no drive control signal, while the main drive power supply voltage is still within the normal operating range. This indicates that the backup drive power supply is coupled to the high-voltage output terminal through an unexpected path, and it can be determined that a short circuit has occurred between the battery power supply path and the high-voltage output terminal, and the fault type is a high-side battery fault type.

[0067] Optionally, in response to the circuit signal being of the third signal type, and the circuit signal indicating an abnormal connection state, i.e., the connection state between the low-voltage output terminal and the ground on which the vehicle is traveling is abnormal, the voltage of the low-voltage output terminal is always maintained at the potential of the ground on which the vehicle is traveling, and after the drive command is closed, the current flowing through the injector solenoid valve does not decay to the background leakage level, while the high-side voltage and control signal are normal, indicating that an abnormal low-resistance connection is formed between the injector ground terminal and the ground on which the vehicle is traveling, thereby determining that a short circuit has occurred in the low-side grounding circuit, and the fault type is a low-side fault type.

[0068] In the embodiments of this application, the above method can independently and directly identify different short-circuit fault types based on the electrical characteristics of a single circuit signal, thereby realizing the binding of fault location and drive path.

[0069] As an optional embodiment, based on the fault type, a drive channel for driving the fuel injector is determined from multiple components, including: determining the channel consisting of the low-pressure output terminal and the ground on which the vehicle is traveling as a low-side channel; determining the channel consisting of the high-pressure output terminal and the main drive power supply as a high-pressure channel; and determining the channel consisting of the high-pressure output terminal and the backup drive power supply as a high-side battery channel; in response to a low-side fault type, determining the high-pressure channel and the high-side battery channel as drive channels; in response to a high-side high-pressure fault type, determining the low-side channel and the high-side battery channel as drive channels; and in response to a high-side battery fault type, determining the low-side channel and the high-pressure channel as drive channels.

[0070] In the embodiments of this application, the aforementioned low-side channel can also be referred to as a low-side drive channel. The aforementioned high-voltage channel can also be referred to as a high-voltage drive channel. The aforementioned high-side battery channel can also be referred to as a high-side battery drive channel.

[0071] Optionally, in response to a low-side fault, the low-side drive channel corresponding to the fault can be shut down to maintain the voltage application capability between the high-voltage output terminal and the main drive power supply, as well as the voltage application capability between the high-voltage output terminal and the backup drive power supply, so that the fuel injector can still be driven to open by the high-voltage power supply or the high-side battery power supply.

[0072] Optionally, in response to a high-side high-voltage fault, the high-voltage drive channel corresponding to the fault can be shut off to maintain the grounding path between the low-voltage output terminal and the ground on which the vehicle is traveling, and the connection path between the high-voltage output terminal and the backup drive power supply can be activated so that the fuel injector can still be powered by the battery and complete the opening action through the low-side grounding circuit, thereby maintaining the fuel injection function under fault conditions.

[0073] Optionally, in response to a high-side battery fault, the low-side channel and high-voltage channel are identified as drive channels. This can shut off the abnormal conduction path between the high-voltage output terminal and the backup drive power supply, maintain the normal power supply capability between the high-voltage output terminal and the main drive power supply, and the controllable grounding capability between the low-voltage output terminal and the ground on which the vehicle is traveling. This allows the fuel injector to still complete normal fuel injection control through the main high-voltage power supply and the low-side grounding path.

[0074] In this embodiment of the application, the above method can dynamically switch between three independent drive paths based on the fault type, and realize the drive mechanism of isolating faulty channels and reusing non-faulty channels: when any drive path has a short circuit, the faulty channel is automatically disabled, and the remaining channels are retained so that the fuel injector can still be effectively opened under single or dual-path cooperation.

[0075] As an optional embodiment, controlling the drive channel to send a drive control signal to the fuel injector to control the fuel injector to perform a fuel injection operation includes: responding to the drive channel being a low-side channel and a high-side battery channel, using a backup drive power supply to perform a power supply operation on the fuel injector, and using the low-side channel and the high-side battery channel to send a drive control signal to the fuel injector performing the power supply operation; responding to the fuel injector performing the power supply operation receiving the drive control signal, performing an opening operation on the fuel injector according to a preset opening speed, wherein the preset opening speed is less than the opening speed of the opening operation performed using the high-voltage channel and the high-side battery channel, and the preset opening speed is less than the opening speed of the opening operation performed using the low-side channel and the high-voltage channel; responding to the completion of the opening operation on the fuel injector, controlling the fuel injector in the open state to perform a fuel injection operation.

[0076] In this embodiment, the aforementioned power supply operation can be used to describe applying a working voltage to the high-potential terminal of the fuel injector solenoid valve via a backup drive power supply, establishing a potential difference across the fuel injector coil to generate the magnetomotive force required to open the solenoid valve. The aforementioned opening speed can be used to describe the time response characteristics of the fuel injector solenoid valve from a closed state to a fully open state, which is determined by the rate of current rise in the coil, and this rate is influenced by both the amplitude of the supply voltage and the circuit impedance. The aforementioned opening operation can be used to describe the process of the fuel passage opening after the supply voltage is established.

[0077] Optionally, in response to the drive channel being a low-side channel and a high-side battery channel, the vehicle battery is used as a backup drive power source. The battery voltage is applied to the fuel injector through the high-side battery channel to perform the power supply operation. At the same time, the low-side channel is controlled to establish a low-impedance path with the ground on which the vehicle is traveling, thereby forming a closed current loop connecting the battery, the high-side battery channel, the fuel injector wire, the low-side channel, and the ground on which the vehicle is traveling. Through the above loop, a drive control signal is sent to the fuel injector performing the power supply operation.

[0078] Optionally, in response to the fuel injector performing the power supply operation receiving a drive control signal, since the voltage of the backup drive power supply (e.g., 12V~24V) is lower than the voltage of the main high voltage power supply (e.g., 80V~120V), the coil current rise rate of the fuel injector performing the power supply operation decreases, the fuel injector opens at a speed lower than the preset opening speed for performing the opening operation using the high voltage channel and the high-side battery channel, and the time required for the fuel injector to go from closed to fully open is extended.

[0079] Optionally, in response to performing a completion opening operation on the fuel injector, controlling the fuel injector in the open state to perform a fuel injection operation may include (after the fuel injector is fully open and the fuel passage is unobstructed, maintaining the drive control signal to keep the coil continuously energized to maintain the open state; at the same time, the high-pressure fuel in the fuel injector is injected through the injection hole under the action of pressure difference to complete the fuel injection operation).

[0080] In this embodiment of the application, the above method can dynamically switch to a drive path powered by the vehicle battery and coordinated with low-side grounding when the high-voltage drive path fails. By using a preset lower voltage, the fuel injector can open at a controllable opening speed lower than the normal operating condition and maintain the fuel injection function.

[0081] As an optional embodiment, the method further includes: controlling the drive circuit to enter a fault mode in response to the circuit signal being of a first signal type and the circuit signal indicating an abnormal connection state, wherein the first signal type is used to indicate the connection state between the high-voltage output terminal and the main drive power supply; during the process of the drive circuit being in the fault mode, in response to the circuit signal being in an invalid state, extending the high-side signal pulse width, wherein the extended high-side signal pulse width is used to maintain the drive control signal emitted by the high-side battery channel.

[0082] In this embodiment, the aforementioned fault mode can be used to represent an emergency operation mode with limited functionality but continuous operation. The aforementioned invalid state can be used to represent a state where the corresponding drive circuit has not failed. The aforementioned high-side signal pulse width can be the on-time duration of the PWM signal used to drive the high-side battery channel.

[0083] Optionally, in response to the circuit signal being of the first signal type, and the circuit signal indicating an abnormal connection state, i.e., the connection state between the high-voltage output terminal and the main drive power supply is abnormal, the signal output of the high-side high-voltage drive channel is turned off, and the power supply path from the main drive power supply to the fuel injector is shut off; at the same time, the coordinated control of the high-side battery drive channel and the low-side drive channel is activated, the drive power supply of the fuel injector is switched to the vehicle battery, and the above-mentioned fault mode with limited function but continuous operation is entered.

[0084] Optionally, during the fault mode of the drive circuit, in response to the invalid state of the circuit signal, the original standard pulse width (e.g., 1.5ms) in the PWM drive signal of the high-side battery drive channel is extended to a compensation pulse width (e.g., 2.5ms~4.0ms) to compensate for the decrease in electromagnetic force caused by the power supply voltage dropping from the main high voltage (e.g., 80V~120V) to the battery voltage (e.g., 12V~24V), thereby ensuring that the fuel injector can still complete the opening action and maintain an effective fuel injection quantity under low voltage conditions.

[0085] In the embodiments of this application, the above method can automatically switch to a fault mode in which the vehicle battery supplies power and the high-side battery channel and the low-side channel work together to drive the high-side high-voltage drive path when a short circuit fault occurs. The pulse width of the high-side battery drive signal is dynamically extended based on real-time operating conditions to compensate for the attenuation of the coil magnetomotive force caused by the sudden drop in voltage. Thus, without relying on the main high-voltage power supply, the fuel injector can still reliably open and inject fuel stably to maintain the basic power output of the engine.

[0086] As an optional embodiment, the method further includes: determining a circuit signal acquisition strategy based on the connection relationship between different components, wherein the acquisition strategy is used to represent the correlation relationship of the acquired circuit signals; acquiring the circuit signals of the drive circuit during vehicle operation, including: acquiring the circuit signals according to the acquisition strategy during vehicle control operation.

[0087] In the embodiments of this application, the above acquisition strategy can be used to represent the correlation relationship of the acquisition circuit signals.

[0088] Optionally, based on the electrical topology between the high-side high-voltage drive path, high-side battery drive path, low-side ground path, main high-voltage power supply, vehicle battery, and fuel injector coil in the fuel injector drive circuit, the coupling path and fault propagation characteristics between each signal node are identified. Based on the above topology, it is determined that independent acquisition channels only need to be set at key fault-sensitive nodes (e.g., current / voltage sampling points of the high-side high-voltage output terminal, high-side battery output terminal, and low-side ground path), and the above acquisition channels form a one-to-one mapping relationship with the corresponding drive channels to ensure that each type of short-circuit fault signal can be captured independently.

[0089] Optionally, during vehicle control, the sampling channels for high-side high voltage detection, high-side battery detection, and low-side detection are triggered sequentially according to the acquisition strategy, and the voltage or current sensing signals of the above sampling channels are read synchronously; the voltage or current sensing signals can be used as circuit signals of the drive circuit.

[0090] In the embodiments of this application, the above method can ensure that each type of short circuit fault, such as high-side high-voltage short circuit, high-side battery short circuit, and low-side short circuit, can be independently identified, thereby improving the accuracy and reliability of fault diagnosis.

[0091] As an optional embodiment, the components include: a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. Based on the connection relationships between the components, a circuit signal acquisition strategy is determined, including: in response to the existence of a connection relationship between the high-voltage output terminal and the main drive power supply, determining a circuit signal acquisition strategy of a first signal type, wherein the first signal type is used to represent the connection state between the high-voltage output terminal and the main drive power supply; in response to the existence of a connection relationship between the high-voltage output terminal and the backup drive power supply, determining a circuit signal acquisition strategy of a second signal type, wherein the second signal type is used to represent the connection state between the high-voltage output terminal and the backup drive power supply; and in response to the existence of a connection relationship between the low-voltage output terminal and the ground on which the vehicle is traveling, determining a circuit signal acquisition strategy of a third signal type, wherein the third signal type is used to represent the connection state between the low-voltage output terminal and the ground.

[0092] Optionally, in response to the connection between the high-voltage output terminal and the main drive power supply, a voltage sampling point is set at the high-potential end of the injector coil in the drive path between the high-voltage output terminal and the main drive power supply to monitor the potential change of the voltage sampling point relative to the ground where the vehicle is driving in real time; when the voltage of the sampling point is continuously lower than a preset threshold, a high-level effective high-side high-voltage short-circuit fault signal is output as the first signal type; the circuit signal acquisition strategy of the first signal type can be determined by the above method.

[0093] In response to the connection between the high-voltage output terminal and the backup drive power supply, a voltage sampling point is set in the drive channel between the high-voltage output terminal and the backup drive power supply to monitor the voltage status of the voltage sampling point when powered by the battery in fault mode. When the voltage of the voltage sampling point is continuously lower than a preset threshold, a high-level active high-side battery short-circuit fault detection signal is output as the second signal type. The circuit signal acquisition strategy for the second signal type can be determined by the above method.

[0094] Optionally, in response to the connection between the low-voltage output terminal and the ground on which the vehicle is traveling, a current sampling resistor is set in the low-side drive path between the low-potential terminal of the injector coil and the ground on which the vehicle is traveling to detect the ground loop current flowing through the injector coil; and the current signal is converted into a voltage signal by a differential amplifier; when the voltage of the aforementioned current sampling resistor is continuously higher than a preset threshold, it is determined to be a low-side short circuit, and a high-level valid low-side short circuit fault detection signal is output as the third signal type; the circuit signal acquisition strategy for the third signal type can be determined by the above method.

[0095] In this embodiment, circuit signals between components in the drive circuit are acquired. Fault type identification is performed on drive circuits where the circuit signals indicate an abnormal connection state. Based on the fault type, a drive channel that can still operate normally is determined. A drive control signal is output through the normally operating drive channel to control the fuel injector to perform fuel injection. Since this embodiment handles drive circuit faults specifically for components in the drive circuit with abnormal connection states, and does not shut down the entire drive circuit when a fault is determined by circuit signals, but instead uses components in normal connection states to form a drive circuit, the fuel injector's fuel injection function is maintained even when the drive circuit is faulty. Therefore, this overcomes the obstacle in related technologies where uniformly shutting down the entire drive circuit leads to the erroneous shutdown of components in normal connection states and the inability of the fuel injector in the drive circuit to perform fuel injection. This solves the technical problem of low control accuracy of fuel injectors in vehicles, achieving the technical effect of improving the control accuracy of fuel injectors in vehicles.

[0096] The technical solutions of the embodiments of this application will be illustrated below with reference to preferred embodiments.

[0097] Currently, in diesel engine fuel systems, the injector multi-cylinder group drive system is the core actuator of the fuel injection system. The working stability of the injector multi-cylinder group drive system directly affects the normal operation and safety of the diesel engine.

[0098] The fault protection schemes for multi-cylinder injector drive systems in related technologies have significant technical flaws. For example, the short-circuit signals in these systems are not finely categorized, and different types of fault signals, such as high-side high-voltage short circuits, high-side battery short circuits, and low-side short circuits, are processed uniformly, resulting in low fault location accuracy. Once a short-circuit fault occurs in a single cylinder bank, the system directly shuts off the output drive of that cylinder bank, and may even clear open-circuit faults in other cylinder banks, posing a risk of false shutdown due to multi-dimensional faults. Furthermore, these systems lack a tiered protection strategy; all short-circuit faults are handled with a uniform full shutdown mode, resulting in an excessively wide impact range. This makes it impossible to maintain minimal drive function while ensuring safety, and the injection system is prone to complete paralysis in fault modes, exhibiting poor system fault tolerance. Finally, the multi-cylinder drive architecture of these systems lacks independent protection design, and the handling of a single cylinder bank fault can easily spread to the entire drive system, violating the design principle of minimizing drive impact.

[0099] This application's embodiment breaks through the design of related technologies that prioritizes central control optimization and provides coarse fault protection. It subdivides short-circuit signals and matches them with independent protection strategies. Through the independent architecture of multiple cylinder banks and "AND logic with drive line", it only shuts down the fault channel. When there is a high-side high-voltage short circuit, it maintains battery drive to ensure basic fuel injection function. It also has fault adaptive recovery capability. This not only makes up for the shortcomings of related technologies in the lack of hierarchical and isolation design for fault protection, but also solves the core pain points of fault propagation and accidental shutdown of non-faulty drives in multi-cylinder bank systems, which greatly improves the stability and fault tolerance of the system.

[0100] This application relates to a fault protection system for a multi-cylinder group of fuel injectors, comprising: a short-circuit detection module, a logic control module, and a drive output module, wherein the short-circuit detection module, the logic control module, and the drive output module are electrically connected in sequence.

[0101] Optionally, the short circuit detection module is used to collect short circuit signals of the injector drive circuit in real time, and accurately classify the short circuit signals into high-side high-voltage short circuit signals, high-side battery short circuit signals and low-side short circuit signals according to the fault location and type. The short circuit detection module includes independent high-side high-voltage short circuit detection units, high-side battery short circuit detection units and low-side short circuit detection units, which respectively collect the three types of short circuit signals and output them independently to the logic control module.

[0102] Optionally, the logic control module is built into the drive line and logic, receives various short-circuit signals output by the short-circuit detection module, executes independent protection control logic for different types of short-circuit signals, and generates corresponding drive channel shutdown / maintenance instructions;

[0103] Optionally, the drive output module adopts a multi-cylinder group independent architecture, with each cylinder group having an independent drive control unit. Each drive control unit is electrically connected to the logic control module and performs shutdown or maintains output operation on the corresponding drive channel according to the instructions of the logic control module, thereby achieving local isolation of faults and minimizing drive impact.

[0104] Optionally, the above-mentioned "AND logic with drive line" specifically refers to logically linking the single type of short-circuit signal output by the short-circuit detection module with the drive control signal of the corresponding drive channel. Only when the short-circuit signal of this type is triggered will a shutdown command for the corresponding target drive channel be generated, without affecting the normal drive logic of other drive channels.

[0105] Compared with related technologies, this application breaks through the bottleneck of unified processing of short-circuit signals in related technologies by accurately classifying short-circuit signals into three categories according to fault location and type: high-side high-voltage short circuit, high-side battery short circuit, and low-side short circuit. This enables accurate identification and location of fault signals, lays a core foundation for subsequent independent protection, and solves the technical pain point of ambiguous fault location in related technologies.

[0106] Optionally, this application embodiment adopts an independent protection mechanism for short-circuit signals. Combined with the drive line and logic, it executes independent protection control logic for different types of short-circuit signals, which completely solves the problem of the risk of other cylinder groups being mistakenly shut down when a short circuit occurs in one cylinder group in the existing solution, and realizes the precise linkage between the fault signal and the drive channel.

[0107] Optionally, in this application embodiment, a differentiated hierarchical protection strategy is designed. Based on the type and scope of the short-circuit fault, only the drive channel of the corresponding faulty part is shut down, while maintaining the normal output of the non-faulty parts. The principle of minimum drive impact is strictly followed. Under the premise of ensuring safe fault handling, the basic drive function of the injector is maintained to the maximum extent, and the system is prevented from being completely paralyzed.

[0108] Optionally, the drive output module in this embodiment adopts a multi-cylinder group independent architecture, with each cylinder group having an independent drive control unit, which realizes localized isolation of faults. A fault in a single cylinder group only affects the corresponding output of that cylinder group and will not spread to the entire drive system, greatly improving the stability of the multi-cylinder group drive system.

[0109] Optionally, this application embodiment adds a fault-driven mode. When a high-side high-voltage short-circuit fault occurs and the high-side battery and low-side drive are in normal state, the fault-driven function is still maintained, maximizing the maintenance of the drive function and improving the fault tolerance of the system.

[0110] The embodiments of this application will be further described below.

[0111] Figure 2 This is a schematic diagram of an injector drive fault protection system according to an embodiment of this application, as shown below. Figure 2 The injector drive fault protection system includes a short circuit detection module 202, a logic control module 204, and a drive output module 206.

[0112] The short circuit detection module 202 may include an independent high-side high-voltage short circuit detection unit, a high-side battery short circuit detection unit, and a low-side short circuit detection unit, which are used to collect the high-side high-voltage short circuit signal, the high-side battery short circuit signal, and the low-side short circuit signal of the injector drive circuit in real time, respectively, to complete the fine classification of short circuit signals, and to output each type of short circuit signal independently to the logic control module 204.

[0113] The logic control module 204 uses a combination of logic gate circuits as its core control element and has a built-in latch module to latch the state of short-circuit signals. It connects to the drive line and logic, receives various short-circuit signals output by the short-circuit detection module 202, executes independent protection control logic for different types of short-circuit signals, and generates corresponding drive channel shutdown / maintenance commands. Simultaneously, the logic control module 204 also has a fault drive mode. When a high-side high-voltage short-circuit signal is detected and the system enters fault drive mode, only the high-voltage drive channel in the corresponding cylinder group is shut down, while maintaining the normal output of the battery drive channel in that cylinder group and all drive channels in other cylinder groups. The aforementioned injector drive fault protection system enters fault mode, the injector injection pulse width increases, maintaining the injection function while slowing down the opening speed.

[0114] The drive output module 206 adopts a multi-cylinder group independent architecture. Each cylinder group drive control unit corresponds to one injector cylinder group. Each drive control unit is electrically connected to the logic control module 204. According to the instructions of the logic control module 204, it shuts down or maintains the output of the corresponding drive channel to achieve local isolation of faults and minimize drive impact. Each cylinder group drive control unit includes a high-side high-voltage drive channel, a high-side battery drive channel, and a low-side drive channel, which respectively receive independent control instructions from the logic control module 204.

[0115] In this embodiment, the single-type short-circuit signal output by the short-circuit detection module 202 is logically linked with the drive control signal of the corresponding drive channel. Only when the short-circuit signal of this type is triggered is a shutdown command for the corresponding target drive channel generated, without affecting the normal drive logic of other drive channels, thus ensuring the accuracy of protection control.

[0116] Figure 3 This is a schematic diagram of the internal structure of an injector drive fault protection system according to an embodiment of this application, as shown below. Figure 3 As shown, the injector drive fault protection system includes a high-voltage short-circuit detection unit 302, a battery short-circuit detection unit 304, a load low-side power drive unit 306, a load high-voltage power drive unit 308, a load battery voltage power drive unit 310, a low-side short-circuit detection unit 312, and a load unit 314.

[0117] Among them, the high-voltage short-circuit detection unit 302 is used to monitor in real time whether a short-circuit fault occurs at the output terminal of the load high-voltage power drive unit 308 to the positive terminal (high voltage) of the power supply.

[0118] The battery short circuit detection unit 304 is used to monitor in real time whether a short circuit fault to the battery voltage occurs at the output terminal of the load battery voltage power drive unit 310.

[0119] The load low-side power drive unit 306 is used to receive the low-side drive control signal, and its output terminal is connected to the low-side ground terminal of the load 314. It is used to control the on / off of the injector grounding circuit. In this embodiment, the load unit 306 may include load low-side power drive 1 to load low-side power drive N.

[0120] The load high-voltage power drive unit 308 is used to receive high-voltage drive control signals, and its output terminal is connected to the high-voltage terminal of the load 314 to provide high-voltage drive voltage to the injector solenoid valve.

[0121] The load battery voltage power drive unit 310 is used to receive battery drive control signals and its output terminal is connected to the battery voltage terminal of the load 314. It is used to provide an alternative power supply path and maintain the fuel injection function when the high voltage drive fails.

[0122] The low-side short-circuit detection unit 312 is used to monitor in real time whether a short-circuit fault to ground occurs at the output terminal of the load low-side power drive unit 306.

[0123] Load unit 314 is used as a load entity for the injector solenoid valve. In this embodiment, load unit 314 may include loads L1 to L2. n .

[0124] Figure 4 This is a schematic diagram of the internal structure of a logic control module according to an embodiment of this application, such as... Figure 4 As shown, the logic control module includes a high-voltage signal latch unit 402, a load high-voltage logic drive unit 404, a battery signal latch unit 406, a load battery drive 408, a low-side signal latch 410, and a load low-side drive 412. The cylinder group high-voltage drive signal is the global enable control signal for the cylinder group, used to control whether all high-voltage drive paths within the cylinder group are allowed to activate.

[0125] The high-voltage signal latching unit 402 receives the high-voltage short-circuit fault signal output by the external high-voltage short-circuit detection unit, latches the signal at the edge or level, and outputs the locked fault status.

[0126] The load high-voltage logic drive unit 404 receives the system's original high-voltage drive command and performs a logical AND operation with the cylinder group high-voltage drive signal and the output of the high-voltage signal latch unit 402. The cylinder group high-voltage drive signal is the battery drive enable control signal for that cylinder group, used to control whether the battery drive path is enabled when the high-voltage drive fails.

[0127] The battery signal latching unit 406 receives the battery short circuit fault signal output by the external battery short circuit detection unit, latches it, and outputs the fault status.

[0128] The load battery driver 408 receives the original battery drive command from the system and performs a logical AND operation with the cylinder group high-voltage drive signal and the output of the battery signal latch unit 406.

[0129] The low-side signal latch 410 receives the load low-side drive signal, and the load low-side drive 412 receives the original low-side drive command from the system and performs a logical AND operation with the output of the low-side signal latch 410. The load low-side drive signal is the enable command for the low-side drive channel of each injector in the cylinder group, used to control whether the low-side MOS transistor of the corresponding cylinder position is turned on, so as to complete the grounding circuit closure of the injector.

[0130] Figure 5 This is a flowchart of an injector drive fault protection control method according to an embodiment of this application, such as... Figure 5 As shown, the injector drive fault protection control method includes the following steps.

[0131] Step S502: Short-circuit signal acquisition and classification.

[0132] Optionally, the high-side high-voltage short-circuit detection unit, high-side battery short-circuit detection unit, and low-side short-circuit detection unit of the short-circuit detection module are used to collect the high-side high-voltage short-circuit signal, high-side battery short-circuit signal, and low-side short-circuit signal of the injector drive circuit, complete the fine classification of short-circuit signals, and output each type of signal independently to the logic control module.

[0133] Step S504: Independent protection logic is triggered.

[0134] Optionally, the logic control module receives the classified short-circuit signals and triggers corresponding independent protection control logic for different types of short-circuit signals through built-in AND logic of the drive line, ensuring that a single fault signal only triggers the protection logic of the corresponding drive channel.

[0135] Step S506, differentiated drive channel control.

[0136] Optionally, the drive output module performs differentiated shutdown / maintenance operations on the corresponding drive channel according to the protection control logic of the logic control module, including: if a low-side short circuit signal is detected, only the low-side drive channel of the corresponding cylinder is shut down, while maintaining the normal output of the drive channels of other cylinders in the same cylinder group and all other cylinder groups, ensuring the normal operation of non-faulty cylinders and non-faulty cylinder groups; if a high-side high-pressure short circuit signal is detected, only the high-pressure drive channel in the corresponding cylinder group is shut down, while maintaining the normal output of the battery drive channel in that cylinder group and all other cylinder groups, and the system enters the fault drive mode. At this time, the injector is powered solely by the battery drive channel, and the opening speed is slowed down, but the normal fuel injection function can still be maintained to avoid drive stoppage; if a high-side battery short circuit signal is detected, only the high-side battery drive channel of the corresponding cylinder group is shut down, while maintaining the normal output of all other cylinder groups, to prevent the fault from spreading to other cylinder groups.

[0137] Step S508: Maintain fault-driven mode.

[0138] Optionally, when a high-side high-voltage short-circuit signal is detected and the control system enters a fault mode, if the high-side battery fault signal is invalid, the high-side high-voltage signal output is turned off, and the high-side signal pulse width is extended to maintain the high-side battery drive signal output, thereby achieving the purpose of still being able to open the injector in the high-side high-voltage fault state and maintaining the mode in which the injector can still work in the fault state.

[0139] Figure 6 This is a schematic diagram of a fuel injector control device in a vehicle according to an embodiment of this application, as shown below. Figure 6 The fuel injector control device 60 in the vehicle shown may include: an acquisition unit 602, a first determination unit 604, a second determination unit 606, and a control unit 608. The acquisition unit 602 is used to acquire circuit signals from the fuel injector drive circuit during vehicle operation. The first determination unit 604 is used to determine the fault type of the drive circuit in the abnormal connection state in response to the circuit signal indicating an abnormal connection state. The second determination unit 606 is used to determine the drive channel for driving the fuel injector from multiple components based on the fault type. The control unit 608 is used to control the drive channel and send drive control signals to the fuel injector to control the fuel injector to perform fuel injection operations.

[0140] In this embodiment, circuit signals between components in the drive circuit are acquired. Fault type identification is performed on drive circuits whose circuit signals indicate an abnormal connection state. Based on the fault type, drive channels that can still operate normally are determined. Drive control signals are output only through these normally operating drive channels to maintain the fuel injector's injection function. Because the fault type identification and drive channel selection steps are performed on drive circuits whose connection state indicates an abnormality, rather than all drive circuits, this overcomes the obstacle in related technologies where uniformly shutting down all drive circuits leads to the accidental shutdown of non-faulty cylinder groups and the inability of fuel injectors in non-faulty cylinder groups to maintain basic fuel injection function. This solves the technical problem of low control accuracy of fuel injectors in vehicles and achieves the technical effect of improving the control accuracy of fuel injectors in vehicles.

[0141] According to another aspect of the embodiments of this application, a vehicle is also provided, the vehicle including: a memory storing an executable program; and a processor for running the program, wherein the program executes any of the methods in the embodiments of this application when it runs.

[0142] According to another aspect of the embodiments of this application, an electronic device is also provided. This electronic device may include a memory and a processor. The memory may be used to store an executable program. The processor may be used to run the aforementioned executable program, wherein the executable program performs any of the methods described in the embodiments of this application during execution.

[0143] According to an embodiment of this application, a computer-readable storage medium is also provided, the storage medium including a stored program, wherein the program executes the method of any one of the embodiments of this application.

[0144] According to an embodiment of this application, a processor is also provided for running a program, wherein the program executes any one of the methods described in the embodiments of this application above.

[0145] Embodiments of this application also provide a computer program product. Optionally, in this embodiment, the computer program product may include a computer program that, when executed by a processor, implements the method of any one of the embodiments of this application.

[0146] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0147] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0148] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, ROM, RAM, portable hard drives, magnetic disks, or optical disks.

[0149] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for controlling fuel injectors in a vehicle, characterized in that, include: During the vehicle's operation, the circuit signal of the fuel injector's drive circuit is acquired, wherein the circuit signal is used to indicate the connection status between multiple components in the drive circuit. In response to the circuit signal indicating that the connection state is an abnormal connection state, the fault type of the fault that occurs in the drive circuit under the abnormal connection state is determined; Based on the fault type, a drive channel for driving the fuel injector is determined from among the multiple components. The drive channel is controlled to send a drive control signal to the fuel injector to control the fuel injector to perform fuel injection.

2. The method according to claim 1, characterized in that, In response to the circuit signal indicating that the connection state is an abnormal connection state, the fault type of the drive circuit in the abnormal connection state is determined, including: In response to the circuit signal indicating that the connection state is the abnormal connection state, the fault type is determined according to the signal type of the circuit signal.

3. The method according to claim 2, characterized in that, The components include a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. The signal types include a first signal type, a second signal type, and a third signal type. The first signal type indicates the connection status between the high-voltage output terminal and the main drive power supply. The second signal type indicates the connection status between the high-voltage output terminal and the backup drive power supply. The third signal type indicates the connection status between the low-voltage output terminal and the ground on which the vehicle is traveling. In response to the circuit signal indicating an abnormal connection status, the fault type is determined according to the signal type of the circuit signal, including: In response to the circuit signal being of the first signal type, and the circuit signal indicating that the connection state is the abnormal connection state, the fault type is determined to be a high-side high-voltage fault type. In response to the circuit signal being the second signal type, and the circuit signal indicating that the connection state is the abnormal connection state, the fault type is determined to be a high-side battery fault type; In response to the circuit signal being the third signal type and the circuit signal indicating that the connection state is the abnormal connection state, the fault type is determined to be a low-side fault type.

4. The method according to claim 3, characterized in that, Based on the fault type, a drive channel for driving the fuel injector is determined from among the multiple components, including: The channel formed by the low-voltage output terminal and the ground on which the vehicle travels is defined as the low-side channel, the channel formed by the high-voltage output terminal and the main drive power supply is defined as the high-voltage channel, and the channel formed by the high-voltage output terminal and the backup drive power supply is defined as the high-side battery channel. In response to the fault type being the low-side fault type, the high-voltage channel and the high-side battery channel are identified as the drive channel; In response to the fault type being the high-side high-voltage fault type, the low-side channel and the high-side battery channel are identified as the drive channel; In response to the fault type being the high-side battery fault type, the low-side channel and the high-voltage channel are identified as the drive channel.

5. The method according to claim 4, characterized in that, Controlling the drive channel to send a drive control signal to the fuel injector to control the fuel injector to perform fuel injection operation includes: In response to the drive channel being the low-side channel and the high-side battery channel, the backup drive power supply is used to perform a power supply operation on the fuel injector, and the drive control signal is sent to the fuel injector performing the power supply operation using the low-side channel and the high-side battery channel; In response to the fuel injector receiving the drive control signal, the fuel injector performs an opening operation according to a preset opening speed, wherein the preset opening speed is less than the opening speed of the opening operation performed using the high-voltage channel and the high-side battery channel, and the preset opening speed is less than the opening speed of the opening operation performed using the low-side channel and the high-voltage channel. In response to the completion of the opening operation on the fuel injector, the fuel injector in the open state is controlled to perform the fuel injection operation.

6. The method according to claim 4, characterized in that, The method further includes: In response to the circuit signal being of the first signal type, and the circuit signal indicating that the connection state is the abnormal connection state, the drive circuit is controlled to enter a fault mode, wherein the first signal type is used to indicate the connection state between the high voltage output terminal and the main drive power supply. During the fault mode of the drive circuit, in response to the invalid state of the circuit signal, the high-side signal pulse width is extended, wherein the extended high-side signal pulse width is used to maintain the drive control signal emitted by the high-side battery channel.

7. The method according to claim 1, characterized in that, The method further includes: Based on the connection relationships between the different components, a signal acquisition strategy for the circuit is determined, wherein the acquisition strategy is used to represent the correlation relationship for acquiring the circuit signals; During the vehicle's operation, acquiring circuit signals from the drive circuit includes: During the process of controlling the vehicle's movement, the circuit signals are collected according to the acquisition strategy.

8. The method according to claim 7, characterized in that, The components include: a high-voltage output terminal, a low-voltage output terminal, a main drive power supply, and a backup drive power supply. Based on the connection relationships between the components, a signal acquisition strategy for the circuit is determined, including: In response to the existence of the connection relationship between the high voltage output terminal and the main drive power supply, the acquisition strategy for the circuit signal of the first signal type is determined, wherein the first signal type is used to indicate the connection state between the high voltage output terminal and the main drive power supply; In response to the existence of the connection relationship between the high-voltage output terminal and the backup drive power supply, the acquisition strategy for determining the circuit signal of the second signal type is used to indicate the connection state between the high-voltage output terminal and the backup drive power supply; In response to the existence of the connection between the low-voltage output terminal and the ground on which the vehicle is traveling, the acquisition strategy for determining the circuit signal of the third signal type, wherein the third signal type is used to indicate the connection state between the low-voltage output terminal and the ground.

9. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 8.

10. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 8.

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