Chassis domain controller and vehicle

Abstract

The utility model provides a chassis domain controller and a vehicle, and relates to the technical field of vehicle control, the chassis domain controller comprises a single-chip microcomputer and a switching circuit, the switching circuit is connected with the single-chip microcomputer and a vehicle control unit, and the single-chip microcomputer is connected with a brake pedal sensor and a brake lamp; the single-chip microcomputer controls the brake lamp to be turned on under the condition that a brake pedal treading signal collected by the brake pedal sensor is received, the switch circuit is controlled to send a brake signal to the vehicle control unit, and the vehicle control unit sends an instruction for stopping outputting torque to a driving motor of a vehicle. And under the condition that the single chip microcomputer receives a brake pedal release signal collected by the brake pedal sensor, the brake lamp is controlled to be turned off, the switching circuit is controlled to send a brake release signal to the vehicle control unit, and the vehicle control unit sends a torque output instruction to the driving motor. The circuit design cost of the vehicle braking system can be saved, so that the cost of the whole vehicle is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle control technology, and more specifically, to a chassis domain controller and a vehicle in the field of vehicle control technology. Background Art

[0002] In the current vehicle braking system, the brake switch and the brake light switch are mechanically linked to the brake pedal. Its working principle is as follows: For the case of vehicle braking, when the driver presses the brake pedal, the brake switch will disconnect, and the brake light switch will close. At this time, the brake light will light up. After the vehicle controller detects the disconnection of the brake switch and the closure of the brake light switch, it controls the drive motor of the vehicle to stop outputting torque; for the case of vehicle braking release, when the driver releases the brake pedal, the brake switch will close, and the brake light switch will disconnect. At this time, the brake light will go out. After the vehicle controller detects the closure of the brake switch and the disconnection of the brake light switch, it controls the drive motor of the vehicle to continue outputting torque. Among them, the brake switch and the brake light switch set in the current vehicle braking system are both separate switch products, and the price is relatively expensive, increasing the overall vehicle cost. Utility Model Content

[0003] This application provides a chassis domain controller and a vehicle, which can save the circuit design cost of the vehicle braking system, thereby reducing the overall vehicle cost.

[0004] In a first aspect, a chassis domain controller and a vehicle are provided. The chassis domain controller includes a single-chip microcomputer and a switch circuit. The switch circuit is connected to the single-chip microcomputer and the vehicle controller. The single-chip microcomputer is connected to a brake pedal sensor and a brake light. Among them, when the single-chip microcomputer receives the brake pedal stepping signal collected by the brake pedal sensor, it controls the brake light to turn on, and controls the switch circuit to send a braking signal to the vehicle controller. The vehicle controller sends an instruction to stop outputting torque to the drive motor of the vehicle. When the single-chip microcomputer receives the brake pedal release signal collected by the brake pedal sensor, it controls the brake light to turn off, and controls the switch circuit to send a brake release signal to the vehicle controller. The vehicle controller sends an instruction to output torque to the drive motor.

[0005] In the above technical solution, the switch circuit integrated in the chassis domain controller is used to replace the brake switch and the brake light switch, which are switch products included in the vehicle braking system in the prior art. On the one hand, since the price of the electronic components that make up the switch circuit is cheap, it can save the circuit design cost of the vehicle braking system, thereby reducing the overall vehicle cost. On the other hand, since the switch circuit is integrated in the chassis domain controller, there is no need to reserve an additional product switch installation position, simplifying the design layout of the hardware architecture of the vehicle braking system.

[0006] In a possible implementation, there are two switch circuits, and the braking signal includes a low-level signal and a high-level signal; the first output terminal of the single-chip microcomputer is connected to the input terminal of the first switch circuit, the output terminal of the first switch circuit is connected to the first input terminal of the vehicle controller, and the first input terminal is connected to the power supply through a first resistor; the second output terminal of the single-chip microcomputer is connected to the input terminal of the second switch circuit, the output terminal of the second switch circuit is connected to the second input terminal of the vehicle controller, and the second input terminal is connected to the ground through a second resistor; wherein, when the single-chip microcomputer receives the braking pedal stepping signal collected by the braking pedal sensor, the single-chip microcomputer controls the braking signal sent by the first switch circuit to the vehicle controller to be a low-level signal, and the single-chip microcomputer controls the braking signal sent by the second switch circuit to the vehicle controller to be a high-level signal; when the single-chip microcomputer receives the braking pedal release signal collected by the braking pedal sensor, the single-chip microcomputer controls the braking signal sent by the first switch circuit to the vehicle controller to be a high-level signal, and the single-chip microcomputer controls the braking signal sent by the second switch circuit to the vehicle controller to be a low-level signal.

[0007] Based on the technical solution that there are two switch circuits and one single-chip microcomputer, when any one of the switch circuits fails, after the input terminal of the vehicle controller VCU detects the correct electrical signal, the torque control of the drive motor M can still be achieved, ensuring the reliability of vehicle braking.

[0008] In a possible implementation, there are two single-chip microcomputers and two switch circuits. The first single-chip microcomputer and the second single-chip microcomputer are connected to the brake pedal sensor. The first single-chip microcomputer and / or the second single-chip microcomputer are connected to the brake lamp. The brake signal includes a low-level signal and a high-level signal. The output end of the first single-chip microcomputer is connected to the input end of the first switch circuit. The output end of the first switch circuit is connected to the first input end of the vehicle controller. The first input end is connected to the power supply through a first resistor. The output end of the second single-chip microcomputer is connected to the input end of the second switch circuit. The output end of the second switch circuit is connected to the second input end of the vehicle controller. The second input end is connected to the ground through a second resistor. Wherein, when the first single-chip microcomputer and the second single-chip microcomputer receive the brake pedal stepping signal collected by the brake pedal sensor, the first single-chip microcomputer controls the brake signal sent by the first switch circuit to the vehicle controller to be a low-level signal, and the second single-chip microcomputer controls the brake signal sent by the second switch circuit to the vehicle controller to be a high-level signal. When the first single-chip microcomputer and the second single-chip microcomputer receive the brake pedal release signal collected by the brake pedal sensor, the first single-chip microcomputer controls the brake signal sent by the first switch circuit to the vehicle controller to be a high-level signal, and the second single-chip microcomputer controls the brake signal sent by the second switch circuit to the vehicle controller to be a low-level signal.

[0009] Based on the technical solution that both the switch circuit and the single-chip microcomputer have two, independent control of each switch circuit is realized. If any single-chip microcomputer fails, it will not affect the control of the other switch circuit. And when any switch circuit fails, after the input end of the vehicle controller VCU detects the correct electrical signal, the torque control of the drive motor M can still be realized, ensuring the reliability of vehicle braking.

[0010] In a possible implementation, the first switch circuit includes a first triode, and the second switch circuit includes a second triode. The base of the first triode is the input end of the first switch circuit. The collector of the first triode is the output end of the first switch circuit. The emitter of the first triode is grounded. The base of the second triode is the input end of the second switch circuit. The collector of the second triode is the output end of the second switch circuit. The emitter of the second triode is connected to the power supply.

[0011] In a possible implementation, the first switching circuit includes a first MOS transistor, and the second switching circuit includes a second MOS transistor; wherein, the gate of the first MOS transistor is the input terminal of the first switching circuit, the drain of the first MOS transistor is the output terminal of the first switching circuit, and the source of the first MOS transistor is grounded; the gate of the second MOS transistor is the input terminal of the second switching circuit, the source of the second MOS transistor is the output terminal of the second switching circuit, and the drain of the second MOS transistor is connected to the power supply.

[0012] In a possible implementation, the vehicle controller includes the first resistor and the second resistor.

[0013] In a possible implementation, a self - resetting fuse is connected in series between the switching circuit and the microcontroller.

[0014] In a possible implementation, the switching circuit includes: a third triode, a fourth triode, and third to sixth resistors; wherein, the first end of the third resistor is connected to the microcontroller, the second end of the third resistor is connected to the first end of the fourth resistor and the base of the third triode, the second end of the fourth resistor and the emitter of the third triode are grounded, the collector of the third triode is connected to the first end of the fifth resistor, the second end of the fifth resistor and the first end of the sixth resistor are connected to the base of the fourth triode, the second end of the sixth resistor and the emitter of the fourth triode are connected to the power supply, and the collector of the fourth triode is connected to the vehicle controller.

[0015] In a possible implementation, the third resistor is a varistor.

[0016] In a second aspect, a vehicle is provided, and the vehicle includes: the above - mentioned chassis domain controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0018] Figure 1 FIG. 1 shows a first exemplary diagram of the connection between a chassis domain controller and a vehicle controller provided by an embodiment of the present application;

[0019] Figure 2 FIG. 2 shows a second exemplary diagram of the connection between a chassis domain controller and a vehicle controller provided by an embodiment of the present application;

[0020] Figure 3 Shows a third exemplary schematic diagram of the connection between a chassis domain controller and a vehicle controller provided by an embodiment of the present application;

[0021] Figure 4 Shows a first exemplary schematic diagram of a switching circuit provided by an embodiment of the present application;

[0022] Figure 5 Shows a second exemplary schematic diagram of a switching circuit provided by an embodiment of the present application;

[0023] Figure 6 Shows a third exemplary schematic diagram of a switching circuit provided by an embodiment of the present application;

[0024] Figure 7 Shows a schematic diagram of a vehicle provided by an embodiment of the present application. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] In the current vehicle braking system, the brake switch and the brake light switch have a mechanical linkage relationship with the brake pedal. Its working principle is as follows: For the case of vehicle braking, when the driver presses the brake pedal, the brake switch will disconnect, and the brake light switch will close. At this time, the brake light lights up. After the vehicle control unit detects the disconnection of the brake switch and the closure of the brake light switch, it controls the drive motor of the vehicle to stop outputting torque. For the case of vehicle braking release, when the driver releases the brake pedal, the brake switch will close, and the brake light switch will disconnect. At this time, the brake light goes out. After the vehicle control unit detects the closure of the brake switch and the disconnection of the brake light switch, it controls the drive motor of the vehicle to continue outputting torque. Among them, the brake switch and the brake light switch provided in the current vehicle braking system are both separate switch products, which are relatively expensive and increase the overall vehicle cost. When at least one of the brake switch and the brake light switch fails, the repair or replacement of the switch will increase the vehicle repair cost.

[0030] Based on the problems existing in the above related technologies, an embodiment of the present application proposes a chassis domain controller and a vehicle. The present application replaces the brake switch and the brake light switch, which are switch products included in the existing vehicle braking system, with a switch circuit integrated in the chassis domain controller, connects the switch circuit to the vehicle control unit, and the chassis domain controller controls the brake light and the switch circuit. The signal that the brake pedal is pressed or the signal that the brake pedal is released is indirectly transmitted to the vehicle control unit through the switch circuit, solving the problem that the brake switch and the brake light switch provided in the current vehicle braking system are expensive, and can save the circuit design cost of the vehicle braking system, thereby reducing the overall vehicle cost.

[0031] The following is an embodiment of a chassis domain controller provided by an embodiment of the present application.

[0032] Figure 1FIG. 0 shows a first exemplary schematic diagram of the connection between a chassis domain controller and a vehicle controller provided by an embodiment of the present application, as Figure 1 shown, the chassis domain controller CDC provided by an embodiment of the present application includes: a microcontroller unit MCU and a switch circuit K. The switch circuit K is connected to the microcontroller unit MCU and the vehicle controller VCU. The microcontroller unit MCU is connected to a brake pedal sensor C and a brake light S. The vehicle controller VCU is connected to a drive motor M of the vehicle. Among them, the switch circuit K replaces the brake switch and the brake light switch of the switch product. The above connection methods are all hard-wired connections. The drive motor M is used to drive the wheels of the vehicle to rotate. The brake pedal sensor C is used to collect the brake pedal signal collected by the brake pedal. The brake pedal signal includes a brake pedal depression signal and a brake pedal release signal. It can be understood that when the brake pedal sensor C collects the brake pedal depression signal, it means that the driver steps on the brake pedal, and when the brake pedal sensor C collects the brake pedal release signal, it means that the driver releases the brake pedal. The brake pedal sensor C is any one of a brake pedal position sensor, a brake pedal travel sensor, a torque sensor, and a photoelectric sensor. The brake pedal position sensor, the brake pedal travel sensor, the torque sensor, and the photoelectric sensor can all collect the brake pedal depression signal or the brake pedal release signal, and the difference lies in the detection method.

[0033] The working principle of the chassis domain controller and the vehicle controller in the embodiment of the present application to achieve vehicle braking or braking release is as follows:

[0034] For the case of vehicle braking, after the driver steps on the brake pedal, the brake pedal sensor C collects the brake pedal depression signal and sends the brake pedal depression signal to the microcontroller unit MCU. For example, the positive pole of the brake light L is connected to the microcontroller unit MCU, the negative pole of the brake light L is grounded, and the microcontroller unit MCU sends a high-level signal to the brake light L to control the brake light L to turn on; and the microcontroller unit MCU controls the switch circuit K to send a braking signal to the vehicle controller VCU. After the vehicle controller VCU receives the braking signal, it determines that the driver steps on the brake pedal to brake the vehicle, and sends an instruction to stop outputting torque to the drive motor M. The drive motor M executes the instruction to stop outputting torque and no longer outputs torque, thereby realizing vehicle braking control.

[0035] For the case of releasing the vehicle brake, after the driver releases the brake pedal, the brake pedal sensor C collects the brake pedal release signal and sends the brake pedal release signal to the microcontroller MCU. For example, the positive pole of the brake light L is connected to the microcontroller MCU, the negative pole of the brake light L is grounded, and the microcontroller MCU sends a low-level signal to the brake light L to control the brake light L to turn off; and the microcontroller MCU controls the switch circuit K to send a brake release signal to the vehicle control unit VCU. After receiving the brake release signal, the vehicle control unit VCU determines that the driver has released the brake pedal and released the vehicle brake, and sends an instruction to output torque to the drive motor M. The drive motor M executes the instruction to output torque and continues to output torque to control the wheels to continue rotating, thereby realizing the control of releasing the vehicle brake.

[0036] In the embodiment of the present application, by using the switch circuit integrated in the chassis domain controller to replace the brake switch and the brake light switch, which are switch products included in the vehicle braking system in the prior art. On the one hand, since the electronic components constituting the switch circuit are inexpensive, the circuit design cost of the vehicle braking system can be saved, thereby reducing the overall vehicle cost. On the other hand, since the switch circuit is integrated in the chassis domain controller, there is no need to reserve an additional installation position for the product switch, which simplifies the design layout of the hardware architecture of the vehicle braking system.

[0037] In a possible implementation manner, Figure 2 FIG. shows a second exemplary schematic diagram of the connection between a chassis domain controller and a vehicle control unit provided by an embodiment of the present application. As Figure 2 shown, there are two switch circuits K, namely the first switch circuit K1 and the second switch circuit K2. The first switch circuit K1 is equivalent to the brake switch, and the second switch circuit K2 is equivalent to the brake light switch. The first output terminal MT1 of the microcontroller MCU is connected to the input terminal TI1 of the first switch circuit K1. The output terminal TK1 of the first switch circuit K1 is connected to the first input terminal VI1 of the vehicle control unit VCU. The first input terminal VI1 is connected to the power supply VCC through the first resistor R1. The second output terminal MT2 of the microcontroller MCU is connected to the input terminal TI2 of the second switch circuit K2. The output terminal TK2 of the second switch circuit K2 is connected to the second input terminal VI2 of the vehicle control unit VCU. The second input terminal VI2 is connected to the ground GND through the second resistor R2. Among them, the vehicle control unit VCU includes the first resistor R1 and the second resistor R2. It can be understood that the first resistor R1 and the second resistor R2 are integrated in the vehicle control unit VCU, which can reduce the physical size of the circuit board, is beneficial to reducing the design cost of the circuit board, and there is no need to reserve additional installation positions for the first resistor R1 and the second resistor R2.

[0038] The braking signal includes a low-level signal and a high-level signal. In the case where there are two switch circuits K and one single-chip microcomputer, for the vehicle braking situation, when the single-chip microcomputer MCU receives the braking pedal stepping signal collected by the braking pedal sensor C, the single-chip microcomputer MCU controls the first switch circuit K1 to disconnect, the second switch circuit K2 to conduct, and the brake light L to turn on. The first switch circuit K1 sends a braking signal of low-level signal to the first input terminal VI1 of the vehicle controller VCU, and the second switch circuit K2 sends a braking signal of high-level signal to the second input terminal VI2 of the vehicle controller VCU. The vehicle controller VCU determines that the braking signal received by the first input terminal VI1 is a low-level signal and the braking signal received by the second input terminal VI2 is a high-level signal, determines that the user steps on the braking pedal to brake the vehicle, and sends an instruction to the drive motor M to stop outputting torque.

[0039] For the vehicle braking release situation, when the single-chip microcomputer MCU receives the braking pedal release signal collected by the braking pedal sensor C, the single-chip microcomputer MCU controls the first switch circuit K1 to conduct, the second switch circuit K2 to disconnect, and the brake light L to turn off. The first switch circuit K1 sends a braking signal of high-level signal to the first input terminal VI1 of the vehicle controller VCU, and the second switch circuit K2 sends a braking signal of low-level signal to the second input terminal VI2 of the vehicle controller VCU. The vehicle controller VCU determines that the braking signal received by the first input terminal VI1 is a high-level signal and the braking signal received by the second input terminal VI2 is a low-level signal, determines that the user releases the braking pedal to release the vehicle braking, and sends an instruction to the drive motor M to output torque.

[0040] Based on the technical solution where there are two switch circuits and one single-chip microcomputer, when any one of the switch circuits fails, after the input terminal of the vehicle controller VCU detects the correct electrical signal, the torque control of the drive motor M can still be achieved, ensuring the reliability of vehicle braking.

[0041] In a possible implementation, Figure 3 Figure 3 shows a third exemplary schematic diagram of the connection between a chassis domain controller and a vehicle controller provided by an embodiment of the present application, as Figure 3As shown, the switch circuit K has two parts, namely the first switch circuit K1 and the second switch circuit K2. The first switch circuit K1 is equivalent to a brake switch, and the second switch circuit K2 is equivalent to a brake light switch. The microcontroller MCU has two parts, namely the first microcontroller MCU1 and the second microcontroller MCU2. The first microcontroller MCU1 and the second microcontroller MCU2 are connected to the brake pedal sensor C. The first microcontroller MCU1 and / or the second microcontroller MCU2 are connected to the brake light L. That is, either the first microcontroller MCU1 or the second microcontroller MCU2 can control the brake light L, or the first microcontroller MCU1 and the second microcontroller MCU2 need to act together to control the brake light L.

[0042] The output terminal UT1 of the first microcontroller MCU1 is connected to the input terminal TI1 of the first switch circuit K1. The output terminal TK1 of the first switch circuit K1 is connected to the first input terminal VI1 of the vehicle control unit VCU. The first input terminal VI1 is connected to the power supply VCC through the first resistor R1. The output terminal UT2 of the second microcontroller MCU2 is connected to the input terminal TI2 of the second switch circuit K2. The output terminal TK2 of the second switch circuit K2 is connected to the second input terminal VI2 of the vehicle control unit VCU. The second input terminal VI2 is connected to the ground GND through the second resistor R2.

[0043] The brake signal includes a low-level signal and a high-level signal. When both the switch circuit K and the microcontroller MCU have two parts, in the case of vehicle braking, when the first microcontroller MCU1 and the second microcontroller MCU2 receive the brake pedal stepping signal collected by the brake pedal sensor C, the first microcontroller MCU1 controls the first switch circuit K1 to disconnect, the second microcontroller MCU2 controls the second switch circuit K2 to conduct, the first microcontroller MCU1 and / or the second microcontroller MCU2 turn on the brake light L. The first switch circuit K1 sends a brake signal of low-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of high-level signal to the second input terminal VI2 of the vehicle control unit VCU. The vehicle control unit VCU determines that the brake signal received by the first input terminal VI1 is a low-level signal and the brake signal received by the second input terminal VI2 is a high-level signal, determines that the user steps on the brake pedal to brake the vehicle, and sends an instruction to the drive motor M to stop outputting torque.

[0044] In the case where the vehicle releases the brakes, when the first single-chip microcomputer MCU1 and the second single-chip microcomputer MCU2 receive the brake pedal release signal collected by the brake pedal sensor C, the first single-chip microcomputer MCU1 controls the first switch circuit K1 to turn on and the second single-chip microcomputer MCU2 controls the second switch circuit K2 to turn off, the brake light L of the first single-chip microcomputer MCU1 and / or the second single-chip microcomputer MCU2 is turned off, the first switch circuit K1 sends a brake signal as a high-level signal to the first input terminal VI1 of the vehicle controller VCU, and the second switch circuit K2 sends a brake signal as a low-level signal to the second input terminal VI2 of the vehicle controller VCU. The vehicle controller VCU determines that the brake signal received at the first input terminal VI1 is a high-level signal and the brake signal received at the second input terminal VI2 is a low-level signal, determines that the user has released the brake pedal to remove the vehicle brakes, and sends an output torque instruction to the drive motor M.

[0045] Based on the above-mentioned technical solutions that both the switch circuit and the single-chip microcomputer have two functions, independent control of each switch circuit is achieved. If any single-chip microcomputer fails, the control of other switch circuits will not be affected. When any switch circuit fails, the input end of the vehicle controller VCU detects the correct electrical signal, which can still realize torque control of the drive motor M, thereby ensuring the reliability of vehicle braking.

[0046] In one possible implementation, Figure 4 A first exemplary schematic diagram of a switch circuit provided in an embodiment of the present application is shown. Figure 4 As shown, in the case of two switch circuits, the switch circuits are composed of transistors, the first switch circuit K1 includes a first transistor Q1, and the second switch circuit K2 includes a second transistor Q2. The base B of the first transistor Q1 is the input terminal TI1 of the first switch circuit K1, the collector C of the first transistor Q1 is the output terminal TK1 of the first switch circuit K2, and the emitter E of the first transistor Q1 is grounded GND; the base B of the second transistor Q2 is the input terminal TI2 of the second switch circuit K2, the collector C of the second transistor Q2 is the output terminal TK2 of the second switch circuit K2, and the emitter of the second transistor Q2 is connected to the power supply.

[0047] Corresponds to Figure 2, the base B of the first triode Q1 is connected to the first output terminal MT1 of the single-chip microcomputer MCU, and the collector C of the first triode Q1 is connected to the first input terminal VI1 of the vehicle control unit VCU; the base B of the second triode Q2 is connected to the second output terminal MT2 of the single-chip microcomputer MCU, and the collector C of the second triode Q2 is connected to the second input terminal VI2 of the vehicle control unit VCU. Among them, for the case of vehicle braking, the first output terminal MT1 of the single-chip microcomputer MCU outputs a low-level signal, and the second output terminal MT2 of the single-chip microcomputer MCU outputs a high-level signal. The single-chip microcomputer MCU controls the first switch circuit K1 to be turned off, the second switch circuit K2 to be turned on, and the brake light L to be turned on. The first switch circuit K1 sends a brake signal of low-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of high-level signal to the second input terminal VI2 of the vehicle control unit VCU. For the case of vehicle braking release, the first output terminal MT1 of the single-chip microcomputer MCU outputs a high-level signal, and the second output terminal MT2 of the single-chip microcomputer MCU outputs a low-level signal. The single-chip microcomputer MCU controls the first switch circuit K1 to be turned on, the second switch circuit K2 to be turned off, and the brake light L to be turned off. The first switch circuit K1 sends a brake signal of high-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of low-level signal to the second input terminal VI2 of the vehicle control unit VCU.

[0048] Corresponding to Figure 3, the base B of the first triode Q1 is connected to the output terminal UT1 of the first microcontroller MCU1, and the collector C of the first triode Q1 is connected to the first input terminal VI1 of the vehicle control unit VCU; the base B of the second triode Q2 is connected to the output terminal UT2 of the second microcontroller MCU2, and the collector C of the second triode Q2 is connected to the second input terminal VI2 of the vehicle control unit VCU. Among them, for the case of vehicle braking, the output terminal UT1 of the first microcontroller MCU1 outputs a low-level signal, and the output terminal UT2 of the second microcontroller MCU2 outputs a high-level signal. The first microcontroller MCU1 controls the first switch circuit K1 to disconnect, and the second microcontroller MCU2 controls the second switch circuit K2 to conduct. The first microcontroller MCU1 and / or the second microcontroller MCU2 turn on the brake light L, and the first switch circuit K1 sends a brake signal of low-level signal to the first input terminal VI1 of the vehicle control unit VCU. For the case of vehicle braking release, the output terminal UT1 of the first microcontroller MCU1 outputs a high-level signal, and the output terminal UT2 of the second microcontroller MCU2 outputs a low-level signal. The first microcontroller MCU1 controls the first switch circuit K1 to conduct, and the second microcontroller MCU2 controls the second switch circuit K2 to disconnect. The first microcontroller MCU1 and / or the second microcontroller MCU2 turn off the brake light L. The first switch circuit K1 sends a brake signal of high-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of low-level signal to the second input terminal VI2 of the vehicle control unit VCU.

[0049] In a possible implementation, Figure 5 FIG. shows a second exemplary schematic diagram of a switch circuit provided by an embodiment of the present application. As Figure 5 shown, for the case of two switch circuits, the switch circuit is composed of MOS transistors. The first switch circuit K1 includes a first MOS transistor M1, and the second switch circuit K2 includes a second MOS transistor M2. The gate G of the first MOS transistor M1 is the input terminal TI1 of the first switch circuit K1, the drain D of the first MOS transistor M1 is the output terminal TK1 of the first switch circuit K1, and the source S of the first MOS transistor M1 is grounded to GND; the gate G of the second MOS transistor M2 is the input terminal TI2 of the second switch circuit K2, the source S of the second MOS transistor M2 is the output terminal TK2 of the second switch circuit K2, and the drain D of the second MOS transistor M2 is connected to the power supply VCC.

[0050] Corresponding to Figure 2, the gate G of the first MOS transistor M1 is connected to the first output terminal MT1 of the microcontroller MCU, and the drain D of the first MOS transistor M1 is connected to the first input terminal VI1 of the vehicle control unit VCU; the gate G of the second MOS transistor M2 is connected to the second output terminal MT2 of the microcontroller MCU, and the source S of the second MOS transistor M2 is connected to the second input terminal VI2 of the vehicle control unit VCU. Among them, for the case of vehicle braking, the first output terminal MT1 of the microcontroller MCU outputs a low-level signal, and the second output terminal MT2 of the microcontroller MCU outputs a high-level signal. The microcontroller MCU controls the first switch circuit K1 to disconnect, the second switch circuit K2 to conduct, and the brake lamp L to turn on. The first switch circuit K1 sends a brake signal of low-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of high-level signal to the second input terminal VI2 of the vehicle control unit VCU. For the case of vehicle braking release, the first output terminal MT1 of the microcontroller MCU outputs a high-level signal, and the second output terminal MT2 of the microcontroller MCU outputs a low-level signal. The microcontroller MCU controls the first switch circuit K1 to conduct, the second switch circuit K2 to disconnect, and the brake lamp L to turn off. The first switch circuit K1 sends a brake signal of high-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal of low-level signal to the second input terminal VI2 of the vehicle control unit VCU.

[0051] Corresponding to Figure 3, the gate G of the first MOS transistor M1 is connected to the output terminal UT1 of the first microcontroller MCU1, and the drain D of the first MOS transistor M1 is connected to the first input terminal VI1 of the vehicle control unit VCU; the gate G of the second MOS transistor M2 is connected to the output terminal UT2 of the second microcontroller MCU2, and the source S of the second MOS transistor M2 is connected to the second input terminal VI2 of the vehicle control unit VCU. Among them, for the case of vehicle braking, the output terminal UT1 of the first microcontroller MCU1 outputs a low-level signal, and the output terminal UT2 of the second microcontroller MCU2 outputs a high-level signal. The first microcontroller MCU1 controls the first switch circuit K1 to disconnect, and the second microcontroller MCU2 controls the second switch circuit K2 to conduct. The first microcontroller MCU1 and / or the second microcontroller MCU2 turn on the brake light L, and the first switch circuit K1 sends a brake signal with a low-level signal to the first input terminal VI1 of the vehicle control unit VCU. For the case of vehicle braking release, the output terminal UT1 of the first microcontroller MCU1 outputs a high-level signal, and the output terminal UT2 of the second microcontroller MCU2 outputs a low-level signal. The first microcontroller MCU1 controls the first switch circuit K1 to conduct, and the second microcontroller MCU2 controls the second switch circuit K2 to disconnect. The first microcontroller MCU1 and / or the second microcontroller MCU2 turn off the brake light L, the first switch circuit K1 sends a brake signal with a high-level signal to the first input terminal VI1 of the vehicle control unit VCU, and the second switch circuit K2 sends a brake signal with a low-level signal to the second input terminal VI2 of the vehicle control unit VCU.

[0052] In a possible implementation manner, a self-resetting fuse is connected in series between the switch circuit K and the microcontroller MCU to prevent excessive current damage to the switch circuit K and the microcontroller MCU caused by short circuits and other situations.

[0053] In a possible implementation manner, Figure 6 FIG. shows a third exemplary schematic diagram of a switch circuit provided by an embodiment of the present application, as Figure 6As shown in the figure, the switching circuit includes: a third triode Q3, a fourth triode Q4, and third to sixth resistors (R1 - R6). The first end of the third resistor R3 is connected to the microcontroller MCU, the second end of the third resistor R3 is connected to the first end of the fourth resistor R4 and the base B of the third triode Q3, the second end of the fourth resistor R4 and the emitter E of the third triode Q3 are grounded to GND, the collector C of the third triode Q3 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 and the first end of the sixth resistor R6 are connected to the base B of the fourth triode Q4, the second end of the sixth resistor R6 and the emitter E of the fourth triode Q4 are connected to the power supply VCC, and the collector E of the fourth triode Q4 is connected to the vehicle controller VCU. The above technical solution realizes that a switching circuit is formed by multiple triodes, which can improve the current-carrying capacity in the circuit.

[0054] In a possible implementation, as Figure 6 shown, the third resistor R3 can be set as a varistor to prevent static electricity in the circuit from damaging the circuit, which is beneficial to improving the reliability of the circuit.

[0055] The following is an embodiment of a vehicle provided by an embodiment of the present application.

[0056] Figure 7 The figure shows a schematic diagram of a vehicle provided by an embodiment of the present application. As Figure 7 shown, a vehicle Car provided by an embodiment of the present application includes the above-mentioned chassis domain controller CDC and vehicle controller VCU. Since this vehicle Car adopts all the technical solutions of all embodiments of the above-mentioned chassis domain controller CDC, it has all the beneficial effects brought by the technical solutions of the above-mentioned chassis domain controller CDC. That is, for the vehicle provided by the embodiment of the present application, by using the switching circuit integrated in the chassis domain controller to replace the brake switch and brake lamp switch, which are used as switch products in the vehicle braking system in the prior art. On the one hand, since the electronic components constituting the switching circuit are inexpensive, it can save the circuit design cost of the vehicle braking system, thereby reducing the overall vehicle cost. On the other hand, since the switching circuit is integrated in the chassis domain controller, there is no need to reserve an additional product switch installation position, which simplifies the design layout of the hardware architecture of the vehicle braking system.

[0057] The above content is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A chassis domain controller, characterized in that: The chassis domain controller includes a single-chip microcomputer and a switch circuit, the switch circuit is connected to the single-chip microcomputer and the vehicle controller, and the single-chip microcomputer is connected to the brake pedal sensor and the brake light; Wherein, when the single chip microcomputer receives the brake pedal stepping signal collected by the brake pedal sensor, it controls the brake light to turn on, and controls the switch circuit to send a brake signal to the vehicle controller, and the vehicle controller sends an instruction to stop outputting torque to the vehicle's drive motor; When receiving the brake pedal release signal collected by the brake pedal sensor, the single chip microcomputer controls the brake light to turn off, and controls the switch circuit to send a brake release signal to the vehicle controller, and the vehicle controller sends an output torque instruction to the drive motor.

2. The chassis domain controller according to claim 1, characterized in that: The switch circuit has two, and the brake signal includes a low level signal and a high level signal; The first output terminal of the single chip microcomputer is connected to the input terminal of the first switch circuit, the output terminal of the first switch circuit is connected to the first input terminal of the vehicle controller, and the first input terminal is connected to the power supply through a first resistor; The second output terminal of the single chip microcomputer is connected to the input terminal of the second switch circuit, the output terminal of the second switch circuit is connected to the second input terminal of the vehicle controller, and the second input terminal is connected to the ground through a second resistor; Wherein, when the single-chip microcomputer receives the brake pedal stepping signal collected by the brake pedal sensor, the single-chip microcomputer controls the first switch circuit to send a brake signal to the vehicle controller as a low-level signal, and the single-chip microcomputer controls the second switch circuit to send a brake signal to the vehicle controller as a high-level signal; When the single-chip microcomputer receives the brake pedal release signal collected by the brake pedal sensor, the single-chip microcomputer controls the first switch circuit to send a high-level signal to the vehicle controller, and the single-chip microcomputer controls the second switch circuit to send a low-level signal to the vehicle controller.

3. The chassis domain controller according to claim 1, characterized in that: There are two single-chip microcomputers, there are two switch circuits, the first single-chip microcomputer and the second single-chip microcomputer are connected to the brake pedal sensor, the first single-chip microcomputer and / or the second single-chip microcomputer are connected to the brake light, and the brake signal includes a low-level signal and a high-level signal; The output end of the first single-chip microcomputer is connected to the input end of the first switch circuit, the output end of the first switch circuit is connected to the first input end of the vehicle controller, and the first input end is connected to the power supply through a first resistor; The output end of the second single-chip microcomputer is connected to the input end of the second switch circuit, the output end of the second switch circuit is connected to the second input end of the vehicle controller, and the second input end is connected to the ground through a second resistor; Wherein, when the first single-chip microcomputer and the second single-chip microcomputer receive the brake pedal stepping signal collected by the brake pedal sensor, the first single-chip microcomputer controls the first switch circuit to send a brake signal to the vehicle controller as a low-level signal, and the second single-chip microcomputer controls the second switch circuit to send a brake signal to the vehicle controller as a high-level signal; When the first single-chip microcomputer and the second single-chip microcomputer receive the brake pedal release signal collected by the brake pedal sensor, the first single-chip microcomputer controls the first switch circuit to send a high-level brake signal to the vehicle controller, and the second single-chip microcomputer controls the second switch circuit to send a low-level brake signal to the vehicle controller.

4. The chassis domain controller according to claim 2 or 3, characterized in that: The first switch circuit includes a first transistor, and the second switch circuit includes a second transistor; The base of the first transistor is the input end of the first switch circuit, the collector of the first transistor is the output end of the first switch circuit, and the emitter of the first transistor is grounded; The base of the second transistor is the input end of the second switch circuit, the collector of the second transistor is the output end of the second switch circuit, and the emitter of the second transistor is connected to the power supply.

5. The chassis domain controller according to claim 2 or 3, characterized in that: The first switch circuit includes a first MOS transistor, and the second switch circuit includes a second MOS transistor; Wherein, the gate of the first MOS transistor is the input end of the first switch circuit, the drain of the first MOS transistor is the output end of the first switch circuit, and the source of the first MOS transistor is grounded; The gate of the second MOS transistor is the input end of the second switch circuit, the source of the second MOS transistor is the output end of the second switch circuit, and the drain of the second MOS transistor is connected to the power supply.

6. The chassis domain controller according to claim 2, characterized in that: The vehicle controller includes the first resistor and the second resistor.

7. The chassis domain controller according to claim 1, characterized in that: A resettable fuse is connected in series between the switch circuit and the single chip microcomputer.

8. The chassis domain controller according to claim 1, characterized in that: The switch circuit comprises: a third transistor, a fourth transistor and third to sixth resistors; Among them, the first end of the third resistor is connected to the single-chip microcomputer, the second end of the third resistor is connected to the first end of the fourth resistor and the base of the third transistor, the second end of the fourth resistor and the emitter of the third transistor are grounded, the collector of the third transistor is connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the first end of the sixth resistor and the base of the fourth transistor, the second end of the sixth resistor and the emitter of the fourth transistor are connected to the power supply, and the collector of the fourth transistor is connected to the vehicle controller.

9. The chassis domain controller according to claim 8, characterized in that: The third resistor is a varistor.

10. A vehicle, characterized in that: The vehicle comprises: a chassis domain controller as described in any one of claims 1 to 9.

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