CN-122009059-A - Vehicle control system, vehicle control method and vehicle

CN122009059ACN 122009059 ACN122009059 ACN 122009059ACN-122009059-A

Abstract

The invention provides a control system of a vehicle, a control method of the vehicle and the vehicle. The power supply end of the power supply management module is electrically connected with the MCU module and the power receiving end of the brake control module respectively, the enabling end of the power supply management module is electrically connected with the first input end of the brake control module to send a first enabling signal, the enabling end of the MCU module is electrically connected with the second input end of the brake control module to send a second enabling signal, the output end of the brake control module is electrically connected with the brake end of the driving module and the first end of the pull-down resistor, the second end of the pull-down resistor is grounded, when the power supply management module is abnormal in power supply, the electric potential of the output end of the brake control module is pulled down by the pull-down resistor to output an effective brake signal, and when the power supply management module is normal in power supply, the brake control module outputs the brake signal according to the first enabling signal and/or the second enabling signal. Therefore, the invention can only adopt the power management module to supply power to the brake control module, has simple topological structure and low cost and saves space.

Inventors

HU BIN
LIU ZHENZHE
Pan Jicong
YANG YINGZHEN
ZHAO GUANGLIANG

Assignees

潍柴动力股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260204

Claims (10)

1. A control system of a vehicle, the control system comprising a power management module, an MCU module, a brake control module, and a motor drive module, wherein: The power supply end of the power supply management module is respectively and electrically connected with the power receiving end of the MCU module and the power receiving end of the brake control module, so that the power supply management module respectively supplies power to the MCU module and the brake control module; the enabling end of the power management module is electrically connected with the first input end of the brake control module so as to send a first enabling signal to the brake control module; The enabling end of the MCU module is electrically connected with the second input end of the brake control module so as to send a second enabling signal to the brake control module; the braking control module comprises a pull-down resistor, the output end of the braking control module is electrically connected with the braking end of the motor driving module and the first end of the pull-down resistor, and the second end of the pull-down resistor is grounded; when the power management module supplies power to the braking control module abnormally, the potential of the output end of the braking control module is pulled down by the pull-down resistor, an effective braking signal is output, and braking control is carried out on the motor driving module; when the power supply management module supplies power to the brake control module normally, the brake control module outputs a brake signal for controlling the motor driving module according to the first enabling signal and/or the second enabling signal.
2. The control system of claim 1, wherein the first acquisition terminal of the MCU module is electrically connected to the output terminal of the brake control module, and is configured to acquire a brake signal at the output terminal of the brake control module when the MCU module sends the second enable signal to the brake control module.
3. The control system of claim 2, wherein the brake control module comprises a logic and gate, wherein: The first input end of the logic AND gate is electrically connected with the enabling end of the power management module, the second input end of the logic AND gate is electrically connected with the enabling end of the MCU module, the output ends of the logic AND gate are respectively and electrically connected with the braking end of the motor driving module, the first end of the pull-down resistor and the first acquisition end of the MCU module, the power receiving positive end of the logic AND gate is electrically connected with the power supply end of the power management module, and the power receiving negative end of the logic AND gate is grounded.
4. A control system according to any of claims 1-3, further comprising a low voltage power supply module and a high voltage power supply module, wherein: the power supply end of the low-voltage power supply module is electrically connected with the power receiving end of the power supply management module; the power supply end of the high-voltage power supply module is electrically connected with the power receiving end of the motor driving module and the second acquisition end of the MCU module respectively; The driving end of the MCU module is electrically connected with the driving end of the motor driving module, and the clock signal transmitting end of the MCU module is electrically connected with the clock signal receiving end of the power management module.
5. A control method of a vehicle, characterized in that the control method is applied to the control system according to any one of claims 1 to 4, the control method comprising: Judging whether the power management module supplies power to the brake control module normally or not; if the power supply management module supplies power to the brake control module abnormally, the brake control module outputs an effective brake signal to brake the motor driving module; If the power supply management module supplies power to the brake control module normally, the power supply management module acquires the working state of the MCU module and sends a first enabling signal to the brake control module according to the working state of the MCU module; Acquiring the running state of the vehicle through the MCU module, and sending a second enabling signal to the brake control module according to the running state; And outputting a braking signal for controlling the motor driving module according to the first enabling signal and/or the second enabling signal through the braking control module.
6. The control method according to claim 5, wherein the step of the power management module obtaining the operation state of the MCU module and transmitting a first enable signal to the brake control module according to the operation state of the MCU module includes: judging whether the power management module receives a clock signal sent by the MCU module in a first preset time; If the clock signal is not received within the first preset time, the power management module sends a valid first enabling signal to the brake control module; And if the clock signal is received within the first preset time, the power management module sends an invalid first enabling signal to the brake control module.
7. The control method according to claim 6, characterized in that the control method further comprises: When the power management module supplies power to the MCU module normally, the MCU module sends an effective second enabling signal to the brake control module and acquires a brake signal output by the brake control module; Identifying the validity of the brake signal; If the brake signal is identified to be a valid signal, the MCU module sends the clock signal to the power management module within a second preset time; and stopping sending a driving signal and the clock signal to the motor driving module if the braking signal is identified as an invalid signal.
8. The control method according to claim 6, wherein the step of outputting, by the brake control module, a brake signal that controls the motor drive module in accordance with the first enable signal and/or the second enable signal includes: if the first enabling signal and the second enabling signal are invalid signals, the brake control module outputs an invalid brake signal; And if at least one of the first enabling signal and the second enabling signal is a valid signal, the brake control module outputs a valid brake signal.
9. The control method according to any one of claims 5 to 8, characterized in that the control method further comprises: Collecting a power supply signal of a high-voltage power supply module for supplying power to the motor driving module through the MCU module, and identifying whether the power supply signal of the high-voltage power supply module is normal or not; if the power supply signal of the high-voltage power supply module is abnormal, the MCU module sends an effective second enabling signal to the brake control module; and if the power supply signal of the high-voltage power supply module is normal, the MCU module sends an invalid second enabling signal to the brake control module.
10. A vehicle, characterized in that it comprises a control system according to any one of claims 1-4.

Description

Vehicle control system, vehicle control method and vehicle Technical Field The invention relates to the technical field of vehicles, in particular to a vehicle control system, a vehicle control method and a vehicle. Background In the prior art, when the MCU (Microcontroller Unit, a microcontroller unit) detects that the running of the vehicle is faulty, the MCU sends a braking signal to the braking module, and the braking module sends the braking signal to the motor driver to control the vehicle to enter an active short-circuit protection state (ASC, active Short Circuit), namely, control the vehicle to enter a braking state. And the MCU module is powered by the power management module, if the power management module is abnormal, the MCU module can not control the braking module due to power interruption, so that the motor driver can not be controlled to enter an active short-circuit protection state. And the motor output driven by the motor driver is uncontrolled, so that the personal safety of a driver is threatened, and serious potential safety hazards exist. Aiming at the defects, the prior solution mainly comprises the steps of providing a braking control module to be supplied with power by a power management module and a high-voltage power supply together, and ensuring that the braking module can be normally supplied with power by a second high-voltage power supply when the MCU is abnormal, thereby normally working. However, most of the existing high-voltage power supplies are formed by adopting an isolated high-voltage flyback power supply topology, and the existing high-voltage power supplies have the defects of complex topology structure, high circuit cost and limited layout space. Disclosure of Invention In view of the above, the embodiments of the present invention are directed to providing a control system for a vehicle, a control method for a vehicle, and a vehicle, so as to solve the problems of complex topology, high circuit cost, and limited layout space caused by using a high-voltage power supply to supply power to a brake module in the prior art. In one aspect, the present invention provides a control system for a vehicle, the control system including a power management module, an MCU module, a brake control module, and a motor driving module, wherein: The power supply end of the power supply management module is respectively and electrically connected with the power receiving end of the MCU module and the power receiving end of the brake control module, so that the power supply management module respectively supplies power to the MCU module and the brake control module; the enabling end of the power management module is electrically connected with the first input end of the brake control module so as to send a first enabling signal to the brake control module; The enabling end of the MCU module is electrically connected with the second input end of the brake control module so as to send a second enabling signal to the brake control module; the braking control module comprises a pull-down resistor, the output end of the braking control module is electrically connected with the braking end of the motor driving module and the first end of the pull-down resistor, and the second end of the pull-down resistor is grounded; when the power management module supplies power to the braking control module abnormally, the potential of the output end of the braking control module is pulled down by the pull-down resistor, an effective braking signal is output, and braking control is carried out on the motor driving module; when the power supply management module supplies power to the brake control module normally, the brake control module outputs a brake signal for controlling the motor driving module according to the first enabling signal and/or the second enabling signal. In one embodiment, the first acquisition end of the MCU module is electrically connected to the output end of the brake control module, and is configured to acquire a brake signal of the output end of the brake control module when the MCU module sends an effective second enable signal to the brake control module. In one embodiment, the brake control module comprises a logic AND gate, wherein: The first input end of the logic AND gate is electrically connected with the enabling end of the power management module, the second input end of the logic AND gate is electrically connected with the enabling end of the MCU module, the output ends of the logic AND gate are respectively and electrically connected with the braking end of the motor driving module, the first end of the pull-down resistor and the first acquisition end of the MCU module, the power receiving positive end of the logic AND gate is electrically connected with the power supply end of the power management module, and the power receiving negative end of the logic AND gate is grounded. In one embodiment, the control system further comprises a low voltage power module and a hig