Vehicle control method and vehicle control unit

Abstract

The present invention relates to a vehicle control method and a vehicle control unit. The vehicle control method is used to control the start and stop of a vehicle power module and a brake energy regeneration system based on sensor signals, wherein the vehicle power module provides power for a vacuum pump of a vacuum booster of the vehicle. The method comprises: a first step of acquiring a detection signal of a braking torque to determine whether the vehicle is in a braking state; if the vehicle is determined to be in a braking state, proceeding to subsequent steps; a second step of determining whether the vehicle is in a stopped state or a moving state; a third step of determining whether there is sufficient vacuum in the vacuum booster based on the magnitude of the acquired braking torque if the vehicle is determined to be in a stopped state in the second step; and a first control step of outputting a control signal for controlling the state of the vehicle power module based on the determination result of the third step, causing the engine to stop or start running.

Description

Technical Field

[0001] The present invention relates to a vehicle control method and a vehicle control unit, and in particular to a vehicle control method and a vehicle control unit. Background Art

[0002] The low-pressure sensor is used to monitor whether there is sufficient vacuum in the vehicle's vacuum booster. If the vacuum in the vacuum booster is insufficient, the monitoring signal will be transmitted to the vehicle's controller to control the gasoline engine to generate a higher vacuum, which will be accumulated unidirectionally in the vacuum booster to ensure that there is sufficient vacuum in the vacuum booster and that the vehicle has sufficient vacuum servo force under various working conditions.

[0003] The vehicle's start-stop (or start-stop) system is configured to automatically shut down the vehicle's power module (e.g., engine or electric motor) when the vehicle is stationary, thereby reducing the fuel / electric energy consumed by the vehicle's power module idling and thus reducing the vehicle's fuel / electric energy consumption. However, when the vehicle is temporarily stationary, if the low-pressure sensor detects insufficient vacuum in the vacuum booster, the controller will not shut down the vehicle's power module until the vehicle's power module provides sufficient vacuum to the vacuum booster.

[0004] The brake pedal of new energy vehicles is equipped with an angle position sensor to sense the brake pedal position. The brake pedal position signal is used to control energy recovery in new energy vehicles and to control the intensity during automatic braking.

[0005] Therefore, existing new energy vehicles (hybrid vehicles, pure electric vehicles) need to be provided with low-voltage sensors and angle position sensors. Summary of the Invention

[0006] In view of this, the present invention aims to provide a vehicle control method and a vehicle control unit.

[0007] A vehicle control method for controlling the start and stop of a vehicle power module and a brake energy regeneration system based on a signal from a sensor, wherein the vehicle power module provides power for a vacuum pump of a vacuum booster of the vehicle, comprising:

[0008] The first step is to obtain a detection signal of the braking torque to determine whether the vehicle is in a braking state. If it is determined that the vehicle is in a braking state, proceed to the subsequent steps.

[0009] The second step is to determine whether the vehicle is in a stopped state or in a moving state;

[0010] In a third step, if it is determined in the second step that the vehicle is in a stopped state, determining whether there is sufficient vacuum in the vacuum booster based on the obtained braking torque; and

[0011] The first control step is to output a control signal for controlling the state of the vehicle power module according to the judgment result of the third step, so as to stop or start the engine.

[0012] A vehicle control unit is used to control a vehicle power module and a brake energy regeneration system based on signals from sensors, wherein the vehicle power module provides power for a vacuum pump of a vacuum booster of the vehicle, comprising:

[0013] A first judging module is used to judge whether the vehicle is in a braking state;

[0014] The second judgment module is used to judge whether the vehicle is in a stopped state;

[0015] A third judgment module is used to judge whether there is sufficient vacuum in the vacuum booster; and

[0016] The first control module outputs a control signal for controlling the state of the vehicle power module according to the judgment result of the third judgment module in step 3, so as to stop or start the vehicle power module.

[0017] The vehicle control method and control unit of the present invention control the activation and operation of the engine and brake energy regeneration system based on signals from the torque sensor, ensuring vehicle safety while saving energy. Furthermore, the vehicle control method and control unit of the present invention eliminate existing pressure sensors and angular position sensors, reducing component count and lowering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings will help to more clearly and completely understand the other features, details and advantages of the present invention. Among them:

[0019] Figure 1 It is a schematic block diagram of a vehicle according to one embodiment of the present invention.

[0020] Figure 2 It is a block diagram of a vehicle control unit according to one embodiment of the present invention.

[0021] Figure 3 This is a flowchart of a vehicle control method according to one embodiment of the present invention.

[0022] Figure 4 This is a flowchart of a vehicle control method according to another embodiment of the present invention.

[0023] Figure 5 It is a specific flow chart of a vehicle control method according to another embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following describes some of the various embodiments of the present invention, which are intended to provide a basic understanding of the present invention, but are not intended to identify the key or decisive elements of the present invention or to limit the scope of protection.

[0025] Please refer to Figure 1 , Figure 1 2 is a schematic block diagram of a vehicle according to an embodiment of the present invention. The vehicle 2 includes a vehicle control unit 9, a signal input unit 10 and an execution unit 30.

[0026] The vehicle control unit 9 of one embodiment of the present invention has an input connected to a signal input unit 10, and an output connected to an execution unit 30. The vehicle control unit 9 obtains sensor signals from the signal input unit 10 and outputs control signals to control the execution unit 30. The signal input unit 10 includes a torque sensor 11 and a wheel speed sensor 12 for inputting signals to the vehicle control unit 9. The execution unit 30 includes a vehicle power module 31 and a brake energy regeneration system 32. The vehicle power module 31 is, for example, the vehicle's engine or electric motor. The vehicle control unit 9 of one embodiment of the present invention can be a separately provided control unit or integrated into any control unit of the vehicle, such as the control unit of an electronic stability control system or a vehicle control unit.

[0027] Please refer to Figure 2 , Figure 2 FIG. 1 is a block diagram of a vehicle control unit according to an embodiment of the present invention. The vehicle control unit 9 includes:

[0028] A first judging module 91 is used to judge whether the vehicle is in a braking state;

[0029] The second judgment module 92 is used to judge whether the vehicle is in a stopped state;

[0030] A third judging module 93 is used to judge whether there is sufficient vacuum in the vacuum booster; and

[0031] The first control module 94 outputs a control signal for controlling the state of the vehicle power module 31 according to the determination result of the third determination module 93, so as to stop or start the vehicle power module 31, thereby performing a start-stop operation of the vehicle 2;

[0032] The second control module 95 outputs a control signal for controlling the state of the braking energy regeneration system according to the determination result of the second determination module 92 , so as to operate the braking energy regeneration system.

[0033] Among them, the first judgment module 91 obtains the braking torque detection signal, and determines whether the vehicle's brake pedal is stepped on according to the braking torque detection signal, thereby determining whether the vehicle is in a braking state, wherein the braking torque detection signal comes from the vehicle's torque sensor 11.

[0034] The second judgment module 92 obtains a vehicle speed signal and calculates whether the vehicle is in a stopped state or a moving state according to the vehicle speed signal. The vehicle speed signal comes from the wheel speed sensor 12, or the vehicle speed is calculated by other sensors.

[0035] The third determination module 93 determines whether there is sufficient vacuum in the vacuum booster based on the acquired braking torque. It will be appreciated that if there is insufficient vacuum in the vacuum booster, the driver will need to apply greater pressure to the brake pedal. At this point, the braking torque detected by the torque sensor will be greater than the braking torque that would be present if there were sufficient vacuum in the vacuum booster. The acquired braking torque is compared with a preset torque value to determine whether there is sufficient vacuum in the vacuum booster. For example, if the acquired braking torque is greater than or equal to the preset torque value, it is determined that there is insufficient vacuum in the vacuum booster; if the acquired braking torque is less than the preset torque value, it is determined that there is sufficient vacuum in the vacuum booster.

[0036] If the third determination module 93 determines that the vacuum booster does not have a sufficient vacuum level, the first control module 94 outputs a control signal for controlling the state of the vehicle power module 31, causing the vehicle power module 31 to operate and provide a vacuum source for the vacuum booster, thereby ensuring a sufficient vacuum level in the vacuum booster and ensuring vehicle safety. If the third determination module 93 determines that the vacuum booster does have a sufficient vacuum level, the first control module 94 outputs a control signal for controlling the state of the vehicle power module 31, causing it to stop operating to save energy.

[0037] The control signals output by the first control module 94 and the second control module 95 include signals for controlling the execution unit, and may also output prompt signals to the driver to prompt that the vehicle control method of the present invention is running.

[0038] Please refer to Figure 3 , Figure 3 FIG. 1 is a flow chart showing a vehicle control method according to an embodiment of the present invention. The vehicle control method according to an embodiment of the present invention includes the following steps:

[0039] The first step S100 is to obtain a detection signal of the braking torque and determine whether the vehicle is in a braking state. If the vehicle is in a braking state, proceed to the subsequent steps.

[0040] The second step S200 is to determine whether the vehicle is in a stopped state or in a moving state;

[0041] In the third step S300, if it is determined in the second step S200 that the vehicle is in a stopped state, it is determined whether there is sufficient vacuum in the vacuum booster based on the obtained braking torque;

[0042] A first control step S400, outputting a control signal for controlling the state of the vehicle power module to stop or run the engine according to the judgment result of the third step S300; and

[0043] The second control step S500 is to output a control signal for controlling the state of the braking energy regeneration system to operate the braking energy regeneration system if it is determined in the second step S200 that the vehicle is in motion.

[0044] In step 100, a braking torque detection signal is acquired. Based on the braking torque detection signal, it is determined whether the vehicle's brake pedal is depressed, thereby determining whether the vehicle is in a braking state. If the vehicle is determined to be in a braking state, the process proceeds to step 200. Otherwise, the process returns to the initial step, i.e., restarting step 100. The braking torque detection signal comes from the vehicle's torque sensor.

[0045] In step S200, a vehicle speed signal is acquired and used to determine whether the vehicle is stopped or in motion. If the vehicle is stopped, the process proceeds to step S300. If the vehicle is in motion, the process proceeds to step S500. The vehicle speed signal can be derived from a wheel speed sensor or calculated from other sensors.

[0046] In the third step S300, the magnitude of the acquired braking torque is used to determine whether there is sufficient vacuum in the vacuum booster. If there is insufficient vacuum in the vacuum booster, the driver will need to apply greater pressure to the brake pedal. At this point, the braking torque detected by the torque sensor will be greater than the braking torque that would be present if there were sufficient vacuum in the vacuum booster. The acquired braking torque is compared with a preset torque value to determine whether there is sufficient vacuum in the vacuum booster. If the acquired braking torque is greater than or equal to the preset torque value, it is determined that there is insufficient vacuum in the vacuum booster. If the acquired braking torque is less than the preset torque value, it is determined that there is sufficient vacuum in the vacuum booster.

[0047] Please refer to Figure 4 , Figure 4 FIG. 4 is a flow chart showing a vehicle control method according to another embodiment of the present invention. The first control step S400 of the vehicle control method according to this embodiment further includes:

[0048] Sub-step (S410), if it is determined in the third step S300 that there is insufficient vacuum in the vacuum booster, outputting a control signal for controlling the state of the vehicle power module to operate the vehicle power module and provide a vacuum source for the vacuum booster;

[0049] Sub-step (S420): If it is determined in the third step S300 that there is sufficient vacuum in the vacuum booster, a control signal for controlling the state of the vehicle power module is output to stop the operation of the vehicle power module.

[0050] Optionally, the first control step S400 and / or the second control step S500 further includes a prompt signal to prompt the driver that the first control step S400 or the second control step S500 is running.

[0051] The prompt signal is issued simultaneously with, before, or after the first control step S400 or the second control step S500 outputs a control signal for controlling the state of the vehicle's power module or the state of the brake energy regeneration system. The prompt signal is provided, for example, via the vehicle's instrument panel, audio system, or head-up display.

[0052] Please refer to Figure 5 , Figure 5 FIG. 1 is a specific flow chart showing a vehicle control method according to another embodiment of the present invention. The vehicle control method according to this embodiment includes:

[0053] In step S20, a braking torque detection signal is obtained;

[0054] In step S21, based on the braking torque detection signal, it is determined whether the vehicle is in a braking state. If the determination result is yes ("Y" in the figure), the process proceeds to step S22. If the determination result is no ("N" in the figure), the process returns to step S20.

[0055] In step S22, the wheel speed sensor signal is obtained and the vehicle is calculated based on the wheel speed sensor signal to determine whether the vehicle is in a stopped state. If the judgment result is yes ("Y" in the figure), the process proceeds to step S23; if the judgment result is no ("N" in the figure), the process proceeds to step S26;

[0056] In step S23, it is determined whether there is sufficient vacuum in the vacuum booster. Specifically, the obtained braking torque is compared with a preset torque value. If the obtained braking torque is greater than or equal to the preset torque value, it is determined that there is insufficient vacuum in the vacuum booster ("N" in the figure), and the process proceeds to step 24. If the obtained braking torque is less than the preset torque value, it is determined that there is sufficient vacuum in the vacuum booster ("Y" in the figure), and the process proceeds to step 25.

[0057] In step S24, a control signal is issued, the control signal including: running the engine to provide a vacuum source for the vacuum booster; optionally, while performing step S24 or subsequently, performing step S28;

[0058] In step S25, a control signal is issued, the control signal including: stopping the engine; optionally, simultaneously with or after step S25, step S28 is performed;

[0059] In step S26, a control signal is issued, which includes: starting the braking energy regeneration system; optionally, step S28 is performed simultaneously with or after step S26.

[0060] In step S28, the driver is prompted that the vehicle control method of the present invention is running;

[0061] In step S29, end.

[0062] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned vehicle control method when executed by a processor.

[0063] It should be noted that the numbers and names of the above steps, such as first and second, are for illustrative purposes only and do not represent a sequential order. The sequence of the steps of the vehicle control method of the present invention may be adjusted according to actual conditions.

[0064] The present invention also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned vehicle control method when executing the program.

[0065] As described above, the vehicle control method and control unit of the present invention control the activation and operation of the engine and brake energy regeneration system based on signals from the torque sensor, thereby ensuring vehicle safety while also saving energy. Furthermore, the vehicle control method and control unit of the present invention eliminate the existing pressure sensor and angular position sensor, reducing component count and lowering costs.

[0066] While specific embodiments of the present invention have been described, they are presented by way of example only and are not intended to limit the scope of the invention. Rather, the structures described herein may be embodied in a variety of other forms; furthermore, various substitutions and variations may be made to the structures described herein without departing from the spirit and scope of the invention.

Claims

1. A vehicle control method for controlling the start and stop of a vehicle power module (31) and a brake energy regeneration system (32) based on a signal from a sensor, wherein the vehicle power module (31) provides power for a vacuum pump of a vacuum booster of the vehicle, characterized in that: include: The first step (S100) is to obtain a detection signal of the braking torque and determine whether the vehicle is in a braking state. If the vehicle is determined to be in a braking state, proceed to the subsequent steps. The second step (S200) is to determine whether the vehicle is in a stopped state or in a moving state; In the third step (S300), if it is determined in the second step (S200) that the vehicle is in a stopped state, determining whether there is sufficient vacuum in the vacuum booster based on the obtained braking torque; as well as The first control step (S400) is to output a control signal for controlling the state of the vehicle power module according to the judgment result of the third step (S300) to stop or start the engine.

2. The vehicle control method according to claim 1, wherein: In the first step (S100), a braking torque detection signal is obtained, and whether the vehicle is in a braking state is determined based on the braking torque detection signal. If it is determined that the vehicle is in a braking state, the second step (S200) is performed, otherwise the first step (S100) is restarted.

3. The vehicle control method according to claim 1, wherein: In the second step (S200), a vehicle speed signal is obtained, and whether the vehicle is in a stopped state or a moving state is calculated based on the vehicle speed signal. If it is determined that the vehicle is in a stopped state, the third step (S300) is continued. If it is determined that the vehicle is in a moving state, the second control step (S500) is continued.

4. The vehicle control method according to claim 1, wherein: In the third step (S300), whether there is sufficient vacuum in the vacuum booster of the vehicle is determined based on the magnitude of the acquired braking torque; the acquired braking torque is compared with a preset torque value, and if the acquired braking torque is greater than or equal to the preset torque value, it is determined that there is insufficient vacuum in the vacuum booster; If the acquired braking torque is less than the preset torque value, it is determined that there is sufficient vacuum in the vacuum booster.

5. The vehicle control method according to claim 4, wherein: The first control step (S400) includes: In a first sub-step (S410), if it is determined in the third step (S300) that the vacuum booster does not have sufficient vacuum, a control signal for controlling the operation of the vehicle power module is output, so that the vehicle power module is operated to provide a vacuum source for the vacuum booster; In the second sub-step ( S420 ), if it is determined in the third step ( S300 ) that there is sufficient vacuum in the vacuum booster, a control signal for controlling the vehicle power module to stop is output, so that the vehicle power module stops running.

6. The vehicle control method according to claim 1, wherein: Also includes: A second control step (S500), if it is determined in the second step (S200) that the vehicle is in motion, outputting a control signal for controlling the state of the brake energy regeneration system to operate the brake energy regeneration system; In the first control step (S400) and / or the second control step (S500), a prompt signal is also included to prompt the driver that the vehicle control method is running.

7. A vehicle control unit (9) for controlling a vehicle power module (31) and a brake energy regeneration system (32) based on signals from sensors, wherein the vehicle power module (31) provides power for a vacuum pump of a vacuum booster of the vehicle, comprising: A first judgment module (91) is used to judge whether the vehicle is in a braking state; A second judgment module (92) is used to judge whether the vehicle is in a stopped state; A third judgment module (93) is used to judge whether there is sufficient vacuum in the vacuum booster; as well as The first control module (94) outputs a control signal for controlling the state of the vehicle power module (31) according to the judgment result of the third judgment module (93) in step 3, so as to stop or start the vehicle power module (31).

8. The vehicle control unit (9) according to claim 7, characterized in that The first judgment module (91) obtains a braking torque detection signal and judges whether the vehicle's brake pedal is depressed based on the braking torque detection signal, thereby judging whether the vehicle is in a braking state. The braking torque detection signal comes from a torque sensor (11) of the vehicle.

9. The vehicle control unit (9) according to claim 8, characterized in that The second judgment module (92) obtains a vehicle speed signal and calculates whether the vehicle is in a stopped state or a moving state based on the vehicle speed signal. The vehicle speed signal comes from a wheel speed sensor (12), or the vehicle speed is calculated by other sensors.

10. The vehicle control unit (9) according to claim 9, characterized in that The third judgment module (93) judges whether there is sufficient vacuum in the vacuum booster according to the obtained braking torque.

11. The vehicle control unit (9) according to claim 10, characterized in that The first control module (94) outputs a control signal for controlling the state of the vehicle power module (31).

12. The vehicle control unit (9) according to claim 11, characterized in that The invention also includes a second control module (95) which outputs a control signal for controlling the state of the braking energy regeneration system according to the judgment result of the second judgment module (92) in step 1, so as to operate the braking energy regeneration system (32); the control signal output by the first control module (94) and / or the second control module (95) includes a prompt signal to prompt the driver that the first control step (S400) or the second control step (S500) is running.

13. A vehicle comprising: A signal input unit (10), an execution unit (30), and a vehicle control unit (9) as claimed in any one of claims 7 to 12, wherein the input end of the vehicle control unit (9) is connected to the signal input unit (10), and the output end is connected to the execution unit (30).

14. The vehicle according to claim 13, wherein: The signal input unit (10) includes a torque sensor (11) and a wheel speed sensor (12) for inputting signals to a vehicle control unit (9). The execution unit (30) includes a vehicle power module (31) and a brake energy regeneration system (32). The vehicle power module (31) is an engine or an electric motor of the vehicle.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the vehicle control method of any one of claims 1 to 6 is implemented.

16. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the vehicle control method of the vehicle according to any one of claims 1 to 6 is implemented.

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