Engine brake valve drive circuit and shutdown implementation method, equipment, and medium

Abstract

The present invention discloses an engine brake valve drive circuit and a shutdown implementation method, device, and medium, relating to the field of electronic circuit design. The circuit includes a pre-driver chip, a main control chip, and a power supply chip. The pre-driver chip includes a first pre-driver chip for connecting to the main MOSFET on the engine brake valve, and a second pre-driver chip connected to the sub-MOSFET corresponding to each engine brake valve; the main control chip includes a safety core and a functional core connected to the first pre-driver chip to implement high-side control, and a logic judgment component is provided between the safety core and the functional core and the first pre-driver chip, and the functional core is also connected to the second pre-driver chip to implement low-side control; the power supply chip and the safety core are both connected to the main power switch corresponding to the main MOSFET to implement on-off control of the main power switch. This application can effectively ensure vehicle driving safety.

Description

Technical Field

[0001] The present application relates to the field of electronic circuit design, and specifically to an engine brake valve drive circuit and a shutdown implementation method, device, and medium. Background Art

[0002] Existing engine brake valve drive circuits generally use an MCU (Microcontroller Unit) to control a pre-driver chip to drive a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). Four groups of engine brake valves share a high-side control, and the low-side is independently controlled.

[0003] The existing engine brake valve drive circuit has a single shutdown path. When the engine brake valve needs to be shut off, the MCU sends a shutdown command, which then shuts off the MOSFET through the pre-driver chip. If any component in the engine brake valve drive circuit (such as the main control chip or pre-driver chip) fails and becomes uncontrolled, the engine brake valve may not be shut off, causing unintended vehicle deceleration, violating vehicle functional safety principles, and posing a potential risk of injury to the driver and road users. Summary of the Invention

[0004] The present application provides an engine brake valve drive circuit and a shutdown implementation method, device, and medium, which can effectively ensure vehicle driving safety.

[0005] In a first aspect, an embodiment of the present application provides an engine brake valve drive circuit, the engine brake valve drive circuit comprising:

[0006] A pre-driver chip, comprising a first pre-driver chip connected to the main MOSFET on the engine brake valve, and a second pre-driver chip connected to the sub-MOSFET corresponding to each engine brake valve;

[0007] A main control chip, comprising a safety core and a functional core both connected to the first pre-driver chip to implement high-side control, and an AND logic judgment component provided between the safety core and the functional core and the first pre-driver chip, and the functional core is also connected to the second pre-driver chip to implement low-side control;

[0008] The power chip and the safety core are both connected to the main power switch corresponding to the main MOSFET to achieve on-off control of the main power switch.

[0009] In conjunction with the first aspect, in one embodiment,

[0010] One end of the logic judgment component is connected to the safety core and the functional core, and the other end is connected to the main MOSFET on the engine brake valve;

[0011] The AND logic judgment component is used to judge the consistency of the control signals output by the safety core and the functional core, and when they are consistent, send the control signal to the first pre-driver chip to drive the first pre-driver chip.

[0012] In conjunction with the first aspect, in one embodiment,

[0013] The power chip includes a security management unit;

[0014] The security management unit is electrically connected to the main power switch to implement on / off control of the main power switch.

[0015] In conjunction with the first aspect, in one embodiment,

[0016] The engine brake valve drive circuit further includes a power supply, which is connected to both the power chip and the main MOSFET;

[0017] The main power switch is arranged between the power supply and the main MOSFET.

[0018] In conjunction with the first aspect, in one embodiment,

[0019] The engine brake valve includes multiple ones, and one end of each of the multiple engine brake valves is connected to the main MOSFET, and the other end is respectively connected to a sub-MOSFET, and the sub-MOSFETs are all connected to the second pre-driver chip.

[0020] In a second aspect, an embodiment of the present application provides a method for shutting down an engine brake valve drive circuit, which is used to shut down the engine brake valve drive circuit described above. The method for shutting down the engine brake valve drive circuit specifically includes:

[0021] Real-time detection of the engine brake valve operating status to determine whether the engine brake valve needs to be shut off:

[0022] If so, the shutdown control logic is executed;

[0023] If not, no action will be taken;

[0024] Among them, the shutdown control logic is to control the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve, or to control the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve, or to control the shutdown of the main power switch based on the power chip or the safety core.

[0025] In conjunction with the second aspect, in one embodiment,

[0026] The execution priority of controlling the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve is higher than that of controlling the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve;

[0027] The execution priority of the high-side shutdown of the engine brake valve achieved by controlling the first pre-driver chip based on the safety core is higher than the shutdown of the main power switch based on the power chip or the safety core.

[0028] In conjunction with the second aspect, in one embodiment, for the shutdown control logic, the specific execution logic is:

[0029] When the engine brake valve needs to be shut down, the functional core of the main control chip outputs a shut-down instruction to the second pre-driver chip, and the second pre-driver chip selectively shuts down the low side of the corresponding engine brake valve according to the shut-down instruction;

[0030] When the functional core controls the second pre-driver chip to realize the low-side shutdown of the corresponding engine brake valve, if the engine brake valve is not successfully closed, the main control chip outputs a low level through the safety core, causing the AND logic judgment component to output a low level to control the first pre-driver chip to shut down the high side of the engine brake valve;

[0031] When the safety core controls the first pre-driver chip to realize high-side shutdown of the engine brake valve, if the engine brake valve is not closed successfully, the power chip or the safety core inputs a control signal to turn off the main power switch.

[0032] In a third aspect, an embodiment of the present application provides a device for implementing the shutdown of an engine brake valve drive circuit, wherein the device for implementing the shutdown of an engine brake valve drive circuit comprises a processor, a memory, and a shutdown implementation program for the engine brake valve drive circuit stored in the memory and executable by the processor, wherein when the shutdown implementation program for the engine brake valve drive circuit is executed by the processor, the steps of the above-mentioned method for implementing the shutdown of the engine brake valve drive circuit are implemented.

[0033] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a shutdown implementation program for an engine brake valve drive circuit is stored. When the shutdown implementation program for the engine brake valve drive circuit is executed by a processor, the steps of the above-mentioned method for shutting down the engine brake valve drive circuit are implemented.

[0034] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0035] Through high-side control design, low-side control design, and high-side power supply control design, a multi-layer shutdown path design with different priorities is adopted to ensure that when any component in the engine brake valve drive circuit fails and becomes uncontrolled, different levels of shutdown methods can be used to ensure that the injection system will not be without drive, avoid unexpected deceleration of the vehicle, and effectively ensure vehicle driving safety. In addition, different pre-driver chips are used on the high and low sides to ensure that the system will not suffer common cause failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the engine brake valve drive circuit of this application;

[0037] Figure 2 This is a flow chart of a method for implementing a shutoff of an engine brake valve drive circuit according to the present application;

[0038] Figure 3 This is a hardware structure diagram of the device for shutting down the engine brake valve drive circuit in this application. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0041] On the first aspect, an embodiment of the present application provides an engine brake valve drive circuit, which ensures that when any component in the engine brake valve drive circuit fails and becomes uncontrolled through multi-layer shutdown path design with different priorities, the injection system will not be without drive through different levels of shutdown methods, and different pre-driver chips are used on the high and low sides to ensure that the system will not suffer common cause failure.

[0042] In one embodiment, referring to Figure 1 , Figure 1 This is a schematic diagram of the structure of the engine brake valve drive circuit of this application. Figure 1 As shown, the engine brake valve drive circuit includes a pre-drive chip, a main control chip, and a power supply chip.

[0043] The pre-driver chip includes a first pre-driver chip for connecting to the master MOSFET on the engine brake valve, and a second pre-driver chip connected to the corresponding sub-MOSFETs of each engine brake valve. There are multiple engine brake valves, each connected to a corresponding sub-MOSFET. All sub-MOSFETs are connected to the second pre-driver chip, and all engine brake valves are connected to the first pre-driver chip. The master MOSFET corresponds to high-side control, while the sub-MOSFETs correspond to low-side control.

[0044] The main control chip includes a safety core and a functional core that are both connected to the first pre-driver chip to achieve high-side control, and a logic judgment component is provided between the safety core and the functional core and the first pre-driver chip, and the functional core is also connected to the second pre-driver chip to achieve low-side control. That is, for the logic judgment component, one end is connected to the safety core and the functional core, and the other end is connected to the first pre-driver chip. At the same time, the functional core is also connected to the second pre-driver chip. That is, the present application adopts a multi-layer shutdown path design with different priorities through high-side control design, low-side control design, and high-side power supply control design to ensure that when any component in the engine brake valve drive circuit fails and is uncontrolled, the injection system can be ensured to be undriven through different levels of shutdown methods, thereby avoiding unexpected deceleration of the vehicle and effectively ensuring vehicle driving safety. Different pre-driver chips are used for the high and low sides to ensure that the system will not suffer common cause failures.

[0045] The power chip and the safety core are both connected to the main power switch corresponding to the main MOSFET to achieve on / off control of the main power switch. In other words, both the power chip and the safety core can send control signals to the main power switch, thereby achieving on / off control of the main power switch.

[0046] Specifically, one end of the logic judgment component is connected to the safety core and the functional core, and the other end is connected to the total MOSFET on the engine brake valve; the logic judgment component is used to judge the consistency of the control signals output by the safety core and the functional core, and when they are consistent, the control signal is sent to the first pre-driver chip to drive the first pre-driver chip.

[0047] That is, the safety core and functional core of the main control chip work together to achieve high-side control. The main control chip outputs a signal through the safety core and functional core respectively to the AND logic judgment component. After the "AND" logic judgment, the signal is input to the first pre-driver chip for control. In the AND logic judgment component, if the control signals of the safety core and the functional core are inconsistent, the control signal will not send a drive instruction to the first pre-driver chip. This effectively prevents the uncontrolled sending of drive instructions to the first pre-driver chip when the main control chip's functional core experiences an abnormality.

[0048] Furthermore, the power chip includes a safety management unit, which is electrically connected to the main power switch to enable on / off control of the main power switch. The engine brake valve drive circuit also includes a power supply, which is connected to both the power chip and the main MOSFET. The main power switch is positioned between the power supply and the main MOSFET. In actual applications, the power supply is a 24V power supply. One end of the main power switch is connected to the power supply, and the other end is connected to the main MOSFET, thereby enabling the power supply to supply the main MOSFET. The power supply is also connected to the power chip to provide power to the power chip.

[0049] Furthermore, the engine brake valves include multiple valves, each of which has one end connected to a master MOSFET and the other end connected to a sub-MOSFET. Each of the sub-MOSFETs is connected to a second pre-driver chip. In actual applications, there may be four engine brake valves. For each engine brake valve, one end is connected to the master MOSFET and the other end is connected to its corresponding sub-MOSFET.

[0050] The functional core in this application can realize low-side control by acting alone. The main control chip sends instructions to the second pre-driver chip through the functional core to perform low-side control, thereby driving the low-side MOSFET of each engine brake valve.

[0051] The safety management unit or safety core in this application can realize high-side power supply control alone. The safety management unit in the power chip and the safety core of the main control chip each lead out a signal line to the main power switch. Both the safety management unit and the safety core can turn off the main power switch. When the other shutdown paths are unable to turn off the engine brake valve, the system's 24V high-side power supply can be cut off through these two signal lines, causing the engine brake valve to stop working.

[0052] Therefore, for the engine brake valve drive circuit of the present application, when a fault occurs in the engine brake valve drive circuit, its shut-off path includes:

[0053] 1. Shutdown at the actuator level. When a safety-related fault is detected, the main control chip controls the pre-driver chip to shut down the safety-related actuator, putting the system into a safe state without violating the safety goal of the engine braking system to avoid unexpected deceleration;

[0054] 2. Directly cut off the 24V power supply through the main control chip or power chip, shut down the power supply to all actuators, and put the system into a safe state without violating the safety goal of the engine braking system to avoid unexpected deceleration.

[0055] The specific shutdown implementation steps are divided into three layers. The higher priority shutdown method is used first. When the higher priority shutdown method cannot be effectively shut down, the lower priority shutdown path is used for shutdown. The priority classification of the shutdown method is shown in Table 1 below.

[0056] Table 1

[0057]

[0058] Specifically, when the engine brake valve needs to be shut down, the functional core of the main control chip outputs a shut-down instruction to the second pre-driver chip, and the second pre-driver chip selectively shuts down the low side of the corresponding engine brake valve according to the shut-down instruction;

[0059] When the functional core controls the second pre-driver chip to realize the low-side shutdown of the corresponding engine brake valve, if the engine brake valve is not successfully closed, the main control chip outputs a low level through the safety core, causing the AND logic judgment component to output a low level to control the first pre-driver chip to shut down the high side of the engine brake valve;

[0060] When the safety core controls the first pre-driver chip to realize high-side shutdown of the engine brake valve, if the engine brake valve is not closed successfully, the power chip or the safety core inputs a control signal to turn off the main power switch.

[0061] In a second aspect, an embodiment of the present application further provides a method for implementing the shutdown of an engine brake valve drive circuit, which is used to perform shutdown control on the engine brake valve drive circuit described above.

[0062] In one embodiment, referring to Figure 2 , Figure 2 This is a flow chart of the method for shutting down the engine brake valve drive circuit of this application. Figure 2 As shown, the method for shutting down the engine brake valve drive circuit includes:

[0063] S1: Real-time detection of the engine brake valve operating status to determine whether the engine brake valve needs to be shut off. If yes, go to S2; if not, go to S3;

[0064] S2: execute shutdown control logic;

[0065] S3: no treatment;

[0066] Among them, the shutdown control logic is to control the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve, or to control the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve, or to control the shutdown of the main power switch based on the power chip or the safety core.

[0067] It should be noted that the engine brake valve drive circuit in the second aspect includes a pre-driver chip, a main control chip, and a power supply chip. The pre-driver chip includes a first pre-driver chip for connecting to the main MOSFET on the engine brake valve, and a second pre-driver chip connected to the sub-MOSFET corresponding to each engine brake valve. There are multiple engine brake valves, and each engine brake valve is connected to a sub-MOSFET. All sub-MOSFETs are connected to the second pre-driver chip, and all engine brake valves are connected to the first pre-driver chip. For the main MOSFET, it corresponds to high-side control, and for the sub-MOSFET, it corresponds to low-side control.

[0068] The main control chip includes a safety core and a functional core, both connected to the first pre-driver chip for high-side control. A logic judgment component is provided between the safety core and the functional core and the first pre-driver chip, and the functional core is also connected to the second pre-driver chip for low-side control. That is, the logic judgment component has one end connected to the safety core and the functional core, and the other end connected to the first pre-driver chip. The functional core is also connected to the second pre-driver chip. The power chip and the safety core are both connected to the main power switch corresponding to the main MOSFET to achieve on-off control of the main power switch. In other words, both the power chip and the safety core can send control signals to the main power switch, thereby achieving on-off control of the main power switch.

[0069] Furthermore, one end of the logic judgment component is connected to the safety core and the functional core, and the other end is connected to the main MOSFET on the engine brake valve; the logic judgment component is used to judge the consistency of the control signals output by the safety core and the functional core, and when consistent, the control signal is sent to the first pre-driver chip to drive the first pre-driver chip. The power chip includes a safety management unit; the safety management unit is electrically connected to the main power switch to achieve on-off control of the main power switch. The engine brake valve drive circuit also includes a power supply, which is connected to both the power chip and the main MOSFET; the main power switch is arranged between the power supply and the main MOSFET. The engine brake valve includes multiple, and one end of each of the multiple engine brake valves is connected to the main MOSFET, and the other end is respectively connected to a sub-MOSFET, and the sub-MOSFETs are all connected to the second pre-driver chip.

[0070] In this application, the execution priority of controlling the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve is greater than that of controlling the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve;

[0071] The execution priority of the high-side shutdown of the engine brake valve achieved by controlling the first pre-driver chip based on the safety core is higher than the shutdown of the main power switch based on the power chip or the safety core.

[0072] In this application, the specific execution logic for the shutdown control logic is:

[0073] When the engine brake valve needs to be shut down, the functional core of the main control chip outputs a shut-down instruction to the second pre-driver chip, and the second pre-driver chip selectively shuts down the low side of the corresponding engine brake valve according to the shut-down instruction;

[0074] When the functional core controls the second pre-driver chip to realize the low-side shutdown of the corresponding engine brake valve, if the engine brake valve is not successfully closed, the main control chip outputs a low level through the safety core, causing the AND logic judgment component to output a low level to control the first pre-driver chip to shut down the high side of the engine brake valve;

[0075] When the safety core controls the first pre-driver chip to realize high-side shutdown of the engine brake valve, if the engine brake valve is not closed successfully, the power chip or the safety core inputs a control signal to turn off the main power switch.

[0076] Regarding the above description, specifically, when a fault occurs in the engine brake valve drive circuit, it is shut down at the actuator level. When a safety-related fault is monitored, the main control chip controls the pre-driver chip to shut down the safety-related actuator, so that the system enters a safe state, without violating the safety goal of the engine braking system to avoid unexpected deceleration; or the main control chip or power chip directly cuts off the power supply of the 24V power supply, shuts off the power supply of all actuators, and puts the system into a safe state, without violating the safety goal of the engine braking system to avoid unexpected deceleration.

[0077] The following is a detailed description of the execution process of the method for shutting down the engine brake valve drive circuit of the present application.

[0078] When it is detected that the engine brake valve has malfunctioned and the engine brake valve needs to be shut down, the functional core of the main control chip first outputs a shutdown instruction to the second pre-driver chip. The second pre-driver chip selectively shuts off the low side of the corresponding engine brake valve according to the shutdown instruction. After the shutdown instruction is executed, if no malfunction of the engine brake valve is detected, the process ends. If malfunction of the engine brake valve is still detected, the main control chip outputs a low level through the safety core, causing the logic judgment component to output a low level to control the first pre-driver chip to shut off the high side of the engine brake valve. At this time, all engine brake valves are controlled to be shut down at the same time. After the control is executed, if no malfunction of the engine brake valve is detected, the process ends. If malfunction of the engine brake valve is still detected, the power chip or the safety core inputs a control signal to shut off the main power switch, cutting off all drive outputs.

[0079] The method for implementing the shutdown of the engine brake valve drive circuit in the embodiment of the present application adopts a multi-layer shutdown path design with different priorities through high-side control design, low-side control design, and high-side power supply control design to ensure that when any component in the engine brake valve drive circuit fails and is uncontrolled, different levels of shutdown methods can be used to ensure that the injection system will not be without drive, avoid unexpected deceleration of the vehicle, and effectively ensure vehicle driving safety. Different pre-driver chips are used for the high and low sides to ensure that the system will not suffer common cause failures.

[0080] In a third aspect, an embodiment of the present application provides a device for implementing the shutdown of an engine brake valve drive circuit. The device for implementing the shutdown of an engine brake valve drive circuit can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0081] Reference Figure 3 , Figure 3 Schematic diagram of the hardware structure of the engine brake valve drive circuit shutdown device involved in the embodiment of the present application. In the embodiment of the present application, the engine brake valve drive circuit shutdown device may include a processor, a memory, a communication interface and a communication bus.

[0082] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0083] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces. These interfaces are used to shut down the engine brake valve drive circuit and interconnect internal components of the device. They are also used to shut down the engine brake valve drive circuit and interconnect the device with other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user devices can include displays, keyboards, etc.

[0084] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0085] The processor may be a general-purpose processor that can call a shutdown implementation program for the engine brake valve drive circuit stored in a memory and execute the shutdown implementation method for the engine brake valve drive circuit provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the shutdown implementation program for the engine brake valve drive circuit is called can be referenced to the various embodiments of the shutdown implementation method for the engine brake valve drive circuit of the present application and will not be further described here.

[0086] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0087] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0088] The computer-readable storage medium of the present application stores a shutdown implementation program for the engine brake valve drive circuit, wherein when the shutdown implementation program for the engine brake valve drive circuit is executed by the processor, the steps of the shutdown implementation method for the engine brake valve drive circuit as described above are implemented.

[0089] Among them, the method implemented when the shutdown implementation program of the engine brake valve drive circuit is executed can refer to the various embodiments of the shutdown implementation method of the engine brake valve drive circuit of the present application, and will not be repeated here.

[0090] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0091] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0092] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0093] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0094] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0095] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0096] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An engine brake valve drive circuit, characterized in that: The engine brake valve drive circuit includes: A pre-driver chip, comprising a first pre-driver chip connected to the main MOSFET on the engine brake valve, and a second pre-driver chip connected to the sub-MOSFET corresponding to each engine brake valve; A main control chip, comprising a safety core and a functional core both connected to the first pre-driver chip to implement high-side control, and an AND logic judgment component provided between the safety core and the functional core and the first pre-driver chip, and the functional core is also connected to the second pre-driver chip to implement low-side control; The power chip and the safety core are both connected to the main power switch corresponding to the main MOSFET to achieve on-off control of the main power switch.

2. The engine brake valve drive circuit according to claim 1, characterized in that: One end of the logic judgment component is connected to the safety core and the functional core, and the other end is connected to the main MOSFET on the engine brake valve; The AND logic judgment component is used to judge the consistency of the control signals output by the safety core and the functional core, and when they are consistent, send the control signal to the first pre-driver chip to drive the first pre-driver chip.

3. The engine brake valve drive circuit according to claim 1, wherein: The power chip includes a security management unit; The security management unit is electrically connected to the main power switch to implement on / off control of the main power switch.

4. The engine brake valve drive circuit according to claim 1, wherein: The engine brake valve drive circuit further includes a power supply, which is connected to both the power chip and the main MOSFET; The main power switch is arranged between the power supply and the main MOSFET.

5. The engine brake valve drive circuit according to claim 1, characterized in that: The engine brake valve includes multiple ones, and one end of each of the multiple engine brake valves is connected to the main MOSFET, and the other end is respectively connected to a sub-MOSFET, and the sub-MOSFETs are all connected to the second pre-driver chip.

6. A method for shutting down an engine brake valve drive circuit, for shutting down the engine brake valve drive circuit according to any one of claims 1 to 5, characterized in that: The method for shutting down the engine brake valve drive circuit specifically includes: Real-time detection of the engine brake valve operating status to determine whether the engine brake valve needs to be shut off: If so, the shutdown control logic is executed; If not, no action will be taken; Among them, the shutdown control logic is to control the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve, or to control the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve, or to control the shutdown of the main power switch based on the power chip or the safety core.

7. The method for shutting down an engine brake valve drive circuit according to claim 6, wherein: The execution priority of controlling the second pre-driver chip based on the functional core to realize the low-side shutdown of the corresponding engine brake valve is higher than that of controlling the first pre-driver chip based on the safety core to realize the high-side shutdown of the engine brake valve; The execution priority of the high-side shutdown of the engine brake valve achieved by controlling the first pre-driver chip based on the safety core is higher than the shutdown of the main power switch based on the power chip or the safety core.

8. The method for shutting down an engine brake valve drive circuit according to claim 7, wherein: For the shutdown control logic, the specific execution logic is: When the engine brake valve needs to be shut down, the functional core of the main control chip outputs a shut-down instruction to the second pre-driver chip, and the second pre-driver chip selectively shuts down the low side of the corresponding engine brake valve according to the shut-down instruction; When the functional core controls the second pre-driver chip to realize the low-side shutdown of the corresponding engine brake valve, if the engine brake valve is not successfully closed, the main control chip outputs a low level through the safety core, causing the AND logic judgment component to output a low level to control the first pre-driver chip to shut down the high side of the engine brake valve; When the safety core controls the first pre-driver chip to realize high-side shutdown of the engine brake valve, if the engine brake valve is not closed successfully, the power chip or the safety core inputs a control signal to turn off the main power switch.

9. A device for shutting down an engine brake valve drive circuit, characterized in that: The shutdown implementation device of the engine brake valve drive circuit includes a processor, a memory, and a shutdown implementation program of the engine brake valve drive circuit stored in the memory and executable by the processor, wherein when the shutdown implementation program of the engine brake valve drive circuit is executed by the processor, the steps of the shutdown implementation method of the engine brake valve drive circuit as described in any one of claims 6 to 8 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a shutdown implementation program for the engine brake valve drive circuit, wherein when the shutdown implementation program for the engine brake valve drive circuit is executed by the processor, the steps of the shutdown implementation method for the engine brake valve drive circuit as described in any one of claims 6 to 8 are implemented.

Images