Linear valve control system and vehicle

Abstract

The utility model belongs to the technical field of vehicle linear valve control, and particularly relates to a linear valve control system and a vehicle, the linear valve control system comprises a pressure detection module, an MCU, a high side control unit and a low side control unit; the MCU is electrically connected with the pressure detection module and is used for acquiring a pressure signal acquired by the pressure detection module; the high-side control unit is electrically connected between the MCU and the input end of the linear valve; the low-side control unit is electrically connected between the MCU and the output end of the linear valve; and the MCU is used for controlling the opening and closing of the high-side control unit and the low-side control unit and the opening degree of the linear valve according to the pressure signal. According to the linear valve control system, the high-side braking unit and the low-side braking unit are arranged, so that the reliability and the safety of the linear valve control system are improved, and the driving safety of a driver is further ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle linear valve control, in particular to a linear valve control system and a vehicle. Background Art

[0002] With the rapid development of vehicle functions, the application of software and mechatronics in vehicles is increasing, which increases the risk of systematic failure and random hardware failure of vehicles. In related technologies, the controller controls the operation of the vehicle's clutch linear valve and brake linear valve to adjust the clutch oil pressure and achieve vehicle braking. However, when a random hardware failure occurs in the vehicle, the controller may not be able to adjust the working state of the linear valve in time according to the random hardware failure state, which will cause safety risks to the vehicle. Utility Model Content

[0003] The utility model aims to solve the technical problem that the working state of the linear valve cannot be adjusted in time according to the random hardware failure state in the prior art, which may lead to safety risks in the vehicle, and provides a linear valve control system and a vehicle.

[0004] The utility model provides a linear valve control system, comprising a pressure detection module, an MCU, a high-side control unit and a low-side control unit; the MCU is electrically connected to the pressure detection module and is used to obtain a pressure signal collected by the pressure detection module; the high-side control unit is electrically connected between the MCU and an input end of the linear valve; the low-side control unit is electrically connected between the MCU and an output end of the linear valve; the MCU is used to control switches of the high-side control unit and the low-side control unit and the opening of the linear valve according to the pressure signal.

[0005] Optionally, the linear valve includes a clutch linear valve and a brake linear valve;

[0006] The high-side control unit includes a first switch electrically connected between an input end of the clutch linear valve and the MCU, and a second switch electrically connected between an input end of the brake linear valve and the MCU;

[0007] The low-side control unit includes a third switch electrically connected between the output end of the clutch linear valve and the MCU, and a fourth switch electrically connected between the output end of the brake linear valve and the MCU;

[0008] The MCU is used to control the first switch, the second switch, the third switch, and the fourth switch to be closed or opened according to the pressure signal.

[0009] Optionally, the MCU includes a high-side signal input terminal; the high-side control unit includes a high-side signal output terminal electrically connected to the high-side signal input terminal;

[0010] After receiving the high-side feedback signal output from the high-side signal output terminal through the high-side signal input terminal, the MCU is used to shut down the high-side control unit when determining that the high-side control unit fails according to the high-side feedback signal.

[0011] Optionally, the MCU includes a low-side signal input terminal; the low-side control unit includes a low-side signal output terminal electrically connected to the low-side signal input terminal;

[0012] After receiving the low-side feedback signal output from the low-side signal output terminal through the low-side signal input terminal, the MCU is used to shut down the low-side control unit when determining that the low-side control unit fails according to the low-side feedback signal.

[0013] Optionally, the MCU includes a first SPI interface; the low-side control unit includes a second SPI interface electrically connected to the first SPI interface; when the high-side control unit and the low-side control unit are both turned on, the MCU is used to transmit SPI data with the low-side control unit through the first SPI interface and the second SPI interface, and control the opening of the linear valve according to the SPI data.

[0014] Optionally, the linear valve control system further includes a power supply module electrically connected to the MCU, the high-side control unit and the low-side control unit to supply power thereto.

[0015] Optionally, the power supply module includes a power output terminal, a first power input terminal electrically connected to a main battery, and a second power input terminal electrically connected to a backup battery, and the MCU, the high-side control unit and the low-side control unit are all electrically connected to the power output terminal; the power supply module is used to control the power output terminal to switch from being connected to the first power input terminal to being connected to the second power input terminal when the main battery fails.

[0016] Optionally, the power supply module includes a FS pin; the low-side control unit includes an EN pin electrically connected to the FS pin; the power supply module is used to send a low-level signal to the EN pin through the FS pin to control the linear valve to stop working when there is an abnormality in the power supply of the main battery and / or the backup battery.

[0017] Optionally, the MCU includes a reset pin electrically connected to the power supply module; the power supply module is also used to send a low-level signal to the MCU through the reset pin when there is an abnormality in the power supply of the main battery and / or the backup battery, so as to control the MCU to be in a reset state.

[0018] Optionally, the MCU includes a GPIO pin electrically connected to the EN pin; when the high-side control unit and the low-side control unit fail, the MCU is also used to send a GPIO signal to the EN pin through the GPIO pin to control the low-side control unit to shut down.

[0019] Optionally, the utility model provides a vehicle, comprising the above-mentioned linear valve control system.

[0020] In the utility model, the linear valve control system includes a pressure detection module, an MCU, a high-side control unit and a low-side control unit; the MCU is electrically connected to the pressure detection module and is used to obtain the pressure signal collected by the pressure detection module; the high-side control unit is electrically connected between the MCU and the input end of the linear valve; the low-side control unit is electrically connected between the MCU and the output end of the linear valve; the MCU is used to control the switches of the high-side control unit and the low-side control unit and the opening of the linear valve according to the pressure signal.

[0021] In the present utility model, the MCU of the linear valve control system can determine whether the high-side control unit has a hardware failure state according to the pressure signal, such as failure states such as overcurrent, open circuit, short circuit and overtemperature, and can also determine whether the low-side control unit has a hardware failure state according to the pressure signal. Then, only when both the high-side control unit and the low-side control unit do not have a hardware failure state, the MCU10 will control the high-side control unit and the low-side control unit to be turned on at the same time. Then, the MCU can be connected to the linear valve through the high-side control unit and the low-side control unit. At this time, the MCU can further control the opening of the linear valve according to the pressure signal to adjust the power of the vehicle's driving process (that is, adjust the oil pressure of the clutch and realize vehicle braking). In the present utility model. Through the arrangement of the above-mentioned high-side brake unit and the low-side brake unit, the reliability and safety of the vehicle's linear valve control system can be improved, thereby ensuring the driver's driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the overall structure of a linear valve control system provided by an embodiment of the utility model;

[0024] Figure 2It is a detailed structural diagram of a linear valve control system provided in one embodiment of the utility model.

[0025] The reference numerals in the specification are as follows:

[0026] 10. MCU; 101. high-side signal input terminal; 102. low-side signal input terminal; 103. first SPI interface; 104. reset pin; 105. GPIO pin; 20. pressure detection module; 201. clutch pressure detection unit; 202. brake pressure detection unit; 30. high-side control unit; 301. high-side signal output terminal; 40. low-side control unit; 401. low-side signal output terminal; 402. second SPI interface; 403. EN pin; 50. linear valve; 501. clutch linear valve; 5011. clutch linear valve input terminal; 5012. clutch linear valve output terminal; 502. brake linear valve; 5021. brake linear valve input terminal; 5022. brake linear valve output terminal; 60. power supply module; 601. power supply output terminal; 602. first power supply input terminal; 603. second power supply input terminal; 604. FS pin. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation of the present invention.

[0029] like Figure 1 As shown, a linear valve control system provided by an embodiment of the utility model includes a pressure detection module 20, an MCU10, a high-side control unit 30 and a low-side control unit 40; the MCU10 is electrically connected to the pressure detection module 20 and is used to obtain the pressure signal collected by the pressure detection module 20; the high-side control unit 30 is electrically connected between the MCU10 and the input end of the linear valve 50; the low-side control unit 40 is electrically connected between the MCU10 and the output end of the linear valve 50; the MCU10 is used to control the switches of the high-side control unit 30 and the low-side control unit 40 and the opening of the linear valve 50 according to the pressure signal.

[0030] It can be understood that the pressure detection module 20 refers to a module for collecting pressure signals. Here, the pressure detection module 20 includes but is not limited to a clutch pressure detection unit 201 and a brake pressure detection unit 202. The clutch pressure detection unit 201 collects the pressure signal of the clutch, and the brake pressure detection unit 202 collects the pressure signal of the brake. The MCU10 (Microcontroller Unit) is electrically connected to the pressure detection module 20 to receive the pressure signal collected by the pressure detection module 20, and the pressure signal includes the pressure signal collected by the clutch pressure detection unit 201 and the pressure signal collected by the brake pressure detection unit 202. The high-side control unit 30 is used to receive the pressure signal (such as Figure 2 After receiving the IN1 signal and / or IN2 signal shown in the figure, the high-side feedback signal is fed back to the MCU10 according to the above pressure signal, so that the MCU10 can judge whether the high-side control unit 30 has hardware failure states such as overcurrent, open circuit, short circuit and overtemperature according to the high-side feedback signal fed back by the high-side control unit 30; when the MCU10 determines that the high-side control unit 30 is abnormal, the MCU10 controls the high-side control unit 30 to be turned off, and when the MCU10 determines that the high-side control unit 30 is not abnormal, the MCU10 controls the high-side control unit 30 to be turned on. The low-side control unit 40 is used to receive the pressure signal (such as Figure 2 After the IN3 signal and / or IN4 signal shown in the figure), the low-side feedback signal is fed back to the MCU10 according to the above pressure signal, so that the MCU10 judges whether the low-side control unit 40 has a hardware failure state such as overcurrent, open circuit, short circuit and overtemperature according to the low-side feedback signal fed back by the low-side control unit 40. When the MCU10 determines that the low-side control unit 40 is abnormal, the MCU10 controls the low-side control unit 40 to be closed. When the MCU10 determines that the low-side control unit 40 is not abnormal, the MCU10 controls the low-side control unit 40 to be opened. The opening of the linear valve 50 refers to the angle or degree of opening of the linear valve 50. For example, when the linear valve 50 is a rotary switch, the opening of the linear valve 50 may refer to the angle of opening rotated to 30 degrees. When at least one of the high-side control unit 30 and the low-side control unit 40 is turned off, it means that at least one of the side control unit 30 and the low-side control unit 40 is in a hardware failure state, and at this time, at least one of the input end and the output end of the linear valve 50 cannot be connected to the MCU10, so the MCU10 cannot control the operation of the linear valve 50. At this time, the linear valve 50 is in a safe state of stopping operation. Furthermore, when at least one of the side control unit 30 and the low-side control unit 40 is in a hardware failure state, the MCU10 in the linear valve control system cannot control the operation of the linear valve 50, thereby improving the reliability and safety of the linear valve control system.

[0031] In the above embodiment of the utility model, the MCU10 of the linear valve control system can determine whether the high-side control unit 30 has a hardware failure state, such as overcurrent, open circuit, short circuit and overtemperature failure states, according to the pressure signal, and can also determine whether the low-side control unit 40 has a hardware failure state according to the pressure signal. Then, only when both the high-side control unit and the low-side control unit do not have a hardware failure state, the MCU10 will control the high-side control unit 30 and the low-side control unit 40 to be turned on at the same time. Then, the MCU10 can be connected to the linear valve 50 through the high-side control unit 30 and the low-side control unit 40. At this time, the MCU10 can further control the opening of the linear valve 50 according to the pressure signal to adjust the power of the vehicle's driving process (that is, adjust the oil pressure of the clutch and realize vehicle braking). In the utility model. Through the above-mentioned setting of the high-side brake unit 30 and the low-side brake unit 40, the reliability and safety of the vehicle's linear valve control system can be improved, thereby ensuring the driver's driving safety.

[0032] In one embodiment, if Figure 2 As shown, the linear valve 50 includes a clutch linear valve 501 and a brake linear valve 502; understandably, the clutch linear valve 501 refers to the linear valve of the clutch. The brake linear valve 502 refers to the linear valve of the brake. The high-side control unit 30 includes a first switch electrically connected between the input end 5011 of the clutch linear valve and the MCU10, and a second switch electrically connected between the input end 5021 of the brake linear valve and the MCU10; the low-side control unit 40 includes a third switch electrically connected between the output end 5012 of the clutch linear valve and the MCU10, and a fourth switch electrically connected between the output end 5022 of the brake linear valve and the MCU10; understandably, the first switch refers to a switch for controlling the on and off of the first clutch control circuit corresponding to the high-side control unit 30, and the first clutch control circuit refers to the control circuit between the MCU10, the high-side control unit 30 and the clutch linear valve 501. The second switch is a switch for controlling the on-off of the first brake control circuit corresponding to the high-side control unit 30, and the first brake control circuit refers to the control circuit between the MCU10, the high-side control unit 30, and the brake linear valve 502. The third switch is a switch for controlling the on-off of the second clutch control circuit corresponding to the low-side control unit 40, and the second clutch control circuit refers to the control circuit between the MCU10, the low-side control unit 40, and the clutch linear valve 501. The fourth switch is a switch for controlling the second brake control circuit corresponding to the low-side control unit 40, and the second brake control circuit refers to the control circuit between the MCU10, the low-side control unit 40, and the brake linear valve 502.

[0033] Wherein, the MCU10 is used to control the first switch, the second switch, the third switch and the fourth switch to be closed or disconnected according to the pressure signal. It can be understood that the MCU10 can control the closing or disconnection of the first switch, the second switch, the third switch and the fourth switch according to the pressure signal. That is, when the first switch of the first clutch control circuit and the third switch of the second clutch control circuit are closed at the same time, the MCU10 will conduct between the first clutch control circuit and the second clutch control circuit and the clutch linear valve 501, thereby controlling the operation of the clutch linear valve 501. When the second switch of the first brake control circuit and the fourth switch of the second brake control circuit are closed at the same time, the MCU10 will conduct between the first brake control circuit and the second brake control circuit and the brake linear valve 502, thereby controlling the operation of the brake linear valve 502.

[0034] In one embodiment, if Figure 2As shown, the MCU 10 includes a high-side signal input terminal 101; the high-side control unit 30 includes a high-side signal output terminal 301 electrically connected to the high-side signal input terminal 101; it is understandable that the high-side signal input terminal 101 is used to receive the above-mentioned high-side feedback signal output by the high-side control unit 30 through the high-side signal output terminal 301. The high-side feedback signal refers to the current and / or voltage information of the high-side control unit 30. It is understandable that after receiving the high-side feedback signal output from the high-side signal output terminal 301 through the high-side signal input terminal 101, the MCU 10 is used to shut down the high-side control unit 30 when determining that the high-side control unit 30 fails according to the high-side feedback signal. Understandably, the MCU10 determines whether the high-side control unit 30 has a hardware failure state such as overcurrent, open circuit, short circuit and overtemperature according to the high-side feedback signal fed back by the high-side control unit 30. When the MCU10 determines that the high-side control unit 30 has a hardware failure state, it will be confirmed that the high-side control unit 30 has a fault. At this time, the MCU10 controls the high-side control unit 30 to be turned off and reports the fault to warn the driver. When the MCU10 determines that the high-side control unit 30 does not have a hardware failure state, it will be confirmed that the high-side control unit 30 does not have a fault. At this time, the MCU10 controls the high-side control unit 30 to be turned on. The MCU10 controls the high-side control unit 30 to be turned off, which means that the MCU10 controls the first switch and the second switch to be disconnected, thereby disconnecting the communication between the MCU10 and the input end 5011 of the clutch linear valve and the input end 5021 of the brake linear valve. At this time, the clutch linear valve 501 and the brake linear valve 502 are both in a safe state of stopping work. Similarly, MCU10 controls the high-side control unit 30 to turn on, which means that MCU10 controls the first switch and the second switch to be closed at the same time to connect MCU10 with the input end 5011 of the clutch linear valve and the input end 5021 of the brake linear valve. At this time, if the output end 5021 of the clutch linear valve and the output end 5022 of the brake linear valve of MCU10 are also connected with MCU10, the clutch linear valve 501 and the brake linear valve 502 can work normally under the control of MCU10.

[0035] It is understandable that the high-side signal input terminal 101 of the MCU 10 can also be used to receive the first fault information (output terminal 301) output by the high-side control unit 30. Figure 2The first fault information can be directly collected by the high-side control unit 30 in real-time current information and / or real-time voltage information of the unit, and compared with the preset standard current information and / or real-time voltage information. When the two compared do not match, it is determined that a fault occurs and the first fault information is generated. The first fault information is sent to the high-side signal input terminal 101 through the high-side signal output terminal 301, and then the MCU 10 can know that the high-side control unit 30 fails and shut it down according to the first fault signal.

[0036] In one embodiment, if Figure 2 As shown, the MCU 10 includes a low-side signal input terminal 102; the low-side control unit 40 includes a low-side signal output terminal 401 electrically connected to the low-side signal input terminal 102; it can be understood that the low-side signal input terminal 102 is used to receive the above-mentioned low-side feedback signal output by the low-side control unit 40 through the low-side signal output terminal 401. The low-side feedback signal includes current information and / or voltage information of the low-side control unit 40. After receiving the low-side feedback signal output from the low-side signal output terminal 401 through the low-side signal input terminal 102, the MCU 10 is used to shut down the low-side control unit 40 when determining that the low-side control unit 40 fails according to the low-side feedback signal. Understandably, the MCU10 determines whether the low-side control unit 40 has a hardware failure state such as overcurrent, open circuit, short circuit and overtemperature according to the low-side feedback signal fed back by the low-side control unit 40. When the MCU10 determines that the low-side control unit 40 has a hardware failure state, it will be confirmed that the low-side control unit 40 has a fault. At this time, the MCU10 controls the low-side control unit 40 to close and reports the fault to warn the driver. When the MCU10 determines that the low-side control unit 40 does not have a hardware failure state, it will be confirmed that the low-side control unit 40 does not have a fault. At this time, the MCU10 controls the low-side control unit 40 to open. The MCU10 controls the low-side control unit 40 to close means that the MCU10 controls the third switch and the fourth switch to be disconnected, thereby disconnecting the communication between the MCU10 and the output end 5021 of the clutch linear valve and the output end 5022 of the brake linear valve. At this time, the clutch linear valve 501 and the brake linear valve 502 are both in a safe state of stopping work. Similarly, MCU10 controls the low-side control unit 40 to turn on, which means that MCU10 controls the third switch and the fourth switch to be closed at the same time to connect MCU10 with the output end 5021 of the clutch linear valve and the output end 5022 of the brake linear valve. At this time, if the clutch linear valve 501 and the brake linear valve 502 are also connected to MCU10, the clutch linear valve 501 and the brake linear valve 502 can both work normally under the control of MCU10.

[0037] It is understandable that the low-side signal input terminal 102 can also be used to receive the second fault information (outputted from the low-side control unit 40 via the low-side signal output terminal 401). Figure 2 The second fault information can be directly collected by the low-side control unit 40 in the real-time current information and / or real-time voltage information of the unit, and compared with the preset standard current information and / or real-time voltage information. When the two compared do not match, it is determined that a fault occurs and the second fault information is generated. The second fault information will be sent to the low-side signal input terminal 102 through the low-side signal output terminal 401, and then the MCU 10 can know that the low-side control unit 40 fails and shut it down according to the second fault signal.

[0038] In one embodiment, if Figure 2 As shown, the MCU10 includes a first SPI interface 103; the low-side control unit 40 includes a second SPI interface 402 electrically connected to the first SPI interface 103; when the high-side control unit 30 and the low-side control unit 40 are both turned on, the MCU10 is used to transmit SPI data (SPI data can be current data) with the low-side control unit 40 through the first SPI interface 103 and the second SPI interface 402, and control the opening of the linear valve 50 according to the SPI data. It can be understood that the first SPI interface 103 is electrically connected to the second SPI interface 402 for the transmission of SPI data. When the high-side control unit 30 and the low-side control unit 40 are both turned on, the MCU10 determines the SPI data transmitted to the low-side control unit 40 according to the acquired pressure signal, and then controls the opening of the linear valve 50 according to the SPI data.

[0039] In one embodiment, if Figure 2 As shown, the linear valve control system further includes a power supply module 60 electrically connected to the MCU 10, the high-side control unit 30, and the low-side control unit 40 to supply power to them. It can be understood that the power supply module 60 is used to supply power to the MCU 10, the high-side control unit 30, and the low-side control unit 40 (such as Figure 2 Power of the power supply module 60 shown in FIG.

[0040] In a specific embodiment, Figure 2 As shown, the power supply module 60 includes a power output terminal 601, a main battery (such as Figure 2 The first power input terminal 602 electrically connected to the backup battery (such as BAT1) and Figure 2The MCU 10, the high-side control unit 30 and the low-side control unit 40 are all electrically connected to the power output terminal 601; the power supply module 60 is used to control the power output terminal 601 to switch from the state of connecting to the first power input terminal 602 to the state of connecting to the second power input terminal 603 when the main battery fails. It can be understood that the main battery and the backup battery are redundant, that is, when the main battery is in a working state, the backup battery is in an idle state; when the backup battery is in a working state, the main battery is in an idle state. By powering the linear valve control system with two independent power supplies, the stability of the power supply of the linear valve control system can be ensured.

[0041] In one embodiment, if Figure 2 As shown, the power supply module 60 includes a FS pin 604; the low-side control unit 40 includes an EN pin 403 electrically connected to the FS pin 604; the power supply module 60 is used to send a low level signal (such as EN pin 403) to the EN pin 403 through the FS pin 604 when the power supply of the main battery or / and the backup battery is abnormal. Figure 2 4. The FS signal sent to the EN pin 403 through the FS pin 604 is shown in the figure to control the linear valve 50 to stop working. It can be understood that the power supply module 60 has a power-on self-test function and a battery monitoring function. The power-on self-test function can detect whether there is an abnormality inside the power supply module 60. After the power supply module 60 passes the self-test, the battery monitoring function is used to detect whether there is an abnormality in the power supply of the main battery or / and the backup battery. Here, the power supply abnormality of the main battery or / and the backup battery includes an overvoltage or undervoltage fault. When the power supply module 60 detects that there is an abnormality in the power supply of the main battery or / and the backup battery, a low-level signal is sent to the EN pin 403 of the low-side control unit 40 through the FS pin 604 of the power supply module 60, so that the low-side control unit 40 is closed to control the linear valve 50 to stop working, and report the abnormal situation to warn the driver. In this way, when there is a power supply abnormality in the linear valve control system, it can be ensured that the linear valve control system is in a safe state where the linear valve 50 stops working, thereby ensuring the safety of the vehicle driver.

[0042] In one embodiment, if Figure 2As shown, the MCU10 includes a reset pin 104 electrically connected to the power supply module 60; the power supply module 60 is also used to send a low-level signal to the MCU10 through the reset pin 104 to control the MCU10 to be in a reset state when there is an abnormality in the power supply of the main battery or / and the backup battery. Understandably, when there is an abnormality in the power supply of the main battery or / and the backup battery, the reset pin 104 is pulled low by the power supply module 60 to control the MCU10 to be in a reset state, and the abnormal situation is reported to warn the driver. In this way, when there is a power supply abnormality in the linear valve control system, it can be ensured that the linear valve control system is in a safe state in which the MCU10 is in a reset state, thereby ensuring the safety of the vehicle driver.

[0043] In one embodiment, the MCU 10 includes a GPIO pin 105 electrically connected to the EN pin 403; when the high-side control unit 30 and the low-side control unit 40 fail, the MCU 10 is further configured to send a GPIO signal (such as a GPIO signal) to the EN pin 403 through the GPIO pin 105. Figure 2 105 to the EN pin 403) to control the low-side control unit 40 to close. It is understandable that when both the high-side control unit 30 and the low-side control unit 40 fail to control the opening of the linear valve 50, a GPIO signal can be sent to the EN pin 403 of the low-side control unit 40 through the GPIO pin 105 of the MCU10 to control the low-side control unit 40 to close. It is understandable that when the low-side control unit 40 is closed, it is equivalent to the third switch and the fourth switch being disconnected, that is, the second clutch control line and the linear valve 50 and the second brake control line are not conductive. At this time, the MCU10 cannot control the linear valve 50 to work. In this way, even if both the high-side control unit 30 and the low-side control unit 40 fail to control the opening of the linear valve 50, the low-side control unit 40 can be controlled to close through the GPIO signal, thereby controlling the linear valve control system to be in a safe state where the linear valve 50 stops working, thereby ensuring the safety of the vehicle driver.

[0044] The utility model also provides a vehicle, comprising the above-mentioned linear valve control system.

[0045] In the vehicle of the above embodiment of the utility model, the MCU10 of the linear valve control system can determine whether the high-side control unit 30 has a hardware failure state, such as overcurrent, open circuit, short circuit and overtemperature failure states, according to the pressure signal, and can also determine whether the low-side control unit 40 has a hardware failure state according to the pressure signal. Then, only when both the high-side control unit and the low-side control unit do not have a hardware failure state, the MCU10 will control the high-side control unit 30 and the low-side control unit 40 to be turned on at the same time. Then, the MCU10 can be connected to the linear valve 50 through the high-side control unit 30 and the low-side control unit 40. At this time, the MCU10 can further control the opening of the linear valve 50 according to the pressure signal to adjust the power of the vehicle's driving process (that is, adjust the oil pressure of the clutch and realize vehicle braking). In the utility model. Through the above-mentioned setting of the high-side brake unit 30 and the low-side brake unit 40, the reliability and safety of the vehicle's linear valve control system can be improved, thereby ensuring the driver's driving safety.

[0046] The above are only embodiments of the linear valve control system of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A linear valve control system, characterized in that: It includes a pressure detection module, an MCU, a high-side control unit and a low-side control unit; The MCU is electrically connected to the pressure detection module and is used to obtain the pressure signal collected by the pressure detection module; the high-side control unit is electrically connected between the MCU and the input end of the linear valve; the low-side control unit is electrically connected between the MCU and the output end of the linear valve; the MCU is used to control the switches of the high-side control unit and the low-side control unit and the opening of the linear valve according to the pressure signal.

2. The linear valve control system according to claim 1, characterized in that: The linear valve includes a clutch linear valve and a brake linear valve; The high-side control unit includes a first switch electrically connected between an input end of the clutch linear valve and the MCU, and a second switch electrically connected between an input end of the brake linear valve and the MCU; The low-side control unit includes a third switch electrically connected between the output end of the clutch linear valve and the MCU, and a fourth switch electrically connected between the output end of the brake linear valve and the MCU; The MCU is used to control the first switch, the second switch, the third switch, and the fourth switch to be closed or opened according to the pressure signal.

3. The linear valve control system according to claim 1, characterized in that: The MCU includes a high-side signal input terminal; the high-side control unit includes a high-side signal output terminal electrically connected to the high-side signal input terminal; After receiving the high-side feedback signal output from the high-side signal output terminal through the high-side signal input terminal, the MCU is used to shut down the high-side control unit when determining that the high-side control unit fails according to the high-side feedback signal.

4. The linear valve control system according to claim 1, characterized in that: The MCU includes a low-side signal input terminal; the low-side control unit includes a low-side signal output terminal electrically connected to the low-side signal input terminal; After receiving the low-side feedback signal output from the low-side signal output terminal through the low-side signal input terminal, the MCU is used to shut down the low-side control unit when determining that the low-side control unit fails according to the low-side feedback signal.

5. The linear valve control system according to claim 1, characterized in that: The MCU includes a first SPI interface; the low-side control unit includes a second SPI interface electrically connected to the first SPI interface; when the high-side control unit and the low-side control unit are both turned on, the MCU is used to transmit SPI data with the low-side control unit through the first SPI interface and the second SPI interface, and control the opening of the linear valve according to the SPI data.

6. The linear valve control system according to claim 1, characterized in that: The linear valve control system further includes a power supply module electrically connected to the MCU, the high-side control unit and the low-side control unit to supply power thereto.

7. The linear valve control system according to claim 6, characterized in that: The power supply module includes a power output terminal, a first power input terminal electrically connected to a main battery, and a second power input terminal electrically connected to a backup battery. The MCU, the high-side control unit, and the low-side control unit are all electrically connected to the power output terminal. The power supply module is used to control the power output terminal to switch from being connected to the first power input terminal to being connected to the second power input terminal when the main battery fails.

8. The linear valve control system according to claim 7, characterized in that: The power supply module includes a FS pin; the low-side control unit includes an EN pin electrically connected to the FS pin; the power supply module is used to send a low-level signal to the EN pin through the FS pin when there is an abnormality in the power supply of the main battery and / or the backup battery, so as to control the linear valve to stop working.

9. The linear valve control system according to claim 8, characterized in that: The MCU includes a reset pin electrically connected to the power supply module; the power supply module is also used to send a low-level signal to the MCU through the reset pin when there is an abnormality in the power supply of the main battery and / or the backup battery, so as to control the MCU to be in a reset state.

10. The linear valve control system according to claim 8, characterized in that: The MCU includes a GPIO pin electrically connected to the EN pin; when the high-side control unit and the low-side control unit fail, the MCU is also used to send a GPIO signal to the EN pin through the GPIO pin to control the low-side control unit to shut down.

11. A vehicle, characterized in that: A linear valve control system comprising any one of claims 1 to 10.

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