Working method of a four-way water pump control system for an automobile

Abstract

The present invention provides a working method for an automotive four-way water pump control system, and the method includes the following steps: S-1, system initialization; S-2, the controller U3 obtains the temperature value collected by the temperature module; S-3, the controller U3 adjusts the temperature value of the output fluid according to the obtained temperature value. The present invention can enable the integration of the automotive four-way water pump controller and achieve constant temperature regulation of the output.

Description

[0001] This application is a divisional application of the application with the application number 2022107339374, the application date of June 27, 2022, and the invention title "An Automotive Four-Way Water Pump Controller". Technical Field

[0002] The present invention relates to the field of automotive electronic technology, and particularly to a working method of an automotive four-way water pump control system. Background Art

[0003] In recent years, smog has troubled many cities in our country. As the main culprit of smog, automotive exhaust has naturally been widely criticized by the whole society. Since new energy vehicles can effectively solve such problems, they have begun to receive extensive attention from society. Summary of the Invention

[0004] The present invention aims to at least solve the technical problems existing in the prior art, and particularly innovatively provides an automotive four-way water pump controller. Its beneficial effects are as follows: realizing controller integration, reducing pipeline connection, reducing assembly process, being easier for space layout, and reducing wire harness plugs; being able to achieve constant temperature output through proportional mixing; being able to achieve water flow shunt control.

[0005] To achieve the above object of the present invention, the present invention provides an automotive four-way water pump controller, including a box body, a PCB circuit board fixed mounting seat disposed in the box body for fixedly mounting a PCB circuit board, the PCB circuit board being fixedly mounted on the PCB circuit board fixed mounting seat, and a controller module, a temperature module, a motor drive module, a four-way proportional valve module, and a data communication module being disposed on the PCB circuit board;

[0006] The temperature sensing signal end of the controller module is connected to the temperature sensing signal end of the temperature module, the driving end of the controller module is connected to the driving end of the motor drive module, the control end of the controller module is connected to the control end of the four-way proportional valve module, and the data transmission end of the controller module is connected to the data transmission end of the data communication module.

[0007] In a preferred embodiment of the present invention, it further includes a power supply module disposed on the PCB circuit board. The power supply module includes: the power supply capacitor terminal CP of the controller U3 is connected to the first end of the capacitor C8. The second end of the capacitor C8 is connected to the negative electrode of the diode D2 and the positive electrode of the diode D5. The positive electrode of the diode D2 is connected to the first end of the inductor L1, the first end of the resistor R7, the first end of the capacitor C10, and the drain D of the field effect transistor Q3. The second end of the inductor L1 is connected to the first end of the capacitor C3, the first end of the capacitor C4, and the first end of the capacitor C1. The second end of the inductor L1 outputs the power supply VS12V. The second end of the capacitor C3 is connected to the second end of the capacitor C4, the second end of the capacitor C1, and the power supply ground GND. The negative electrode of the diode D5 is connected to the second end of the capacitor C10 and the power supply capacitor terminal VCP of the controller U3. The gate G of the field effect transistor Q3, the second end of the resistor R7, the first end of the resistor R8, and the drain D of the field effect transistor Q2 are connected. The source S of the field effect transistor Q3 is connected to the interface 2 of the power supply interface VSUP1, the interface 1 of the power supply interface VSUP1, and the first end of the transient suppression diode D3. The interface 1 of the power supply interface VSUP1 outputs the power supply VSUP. The second end of the transient suppression diode D3 is connected to the interface 2 of the power supply ground interface GND1, the interface 1 of the power supply ground interface GND1, the power supply ground GND, and the second end of the resistor R8. The source S of the field effect transistor Q2 is connected to the power supply ground GND. The gate G of the field effect transistor Q2 is connected to the first end of the resistor R11. The second end of the resistor R11 is connected to the power supply control terminal PE0 of the controller U3. Connect the positive end of the 12V power supply to the interface 1 or / and the interface 2 of the power supply interface VSUP1, and connect the ground end of the 12V power supply to the interface 1 or / and the interface 2 of the power supply ground interface GND1. The 12V power supply passes through the body diode (parasitic diode) of the field effect transistor Q2 and then through the inductor L1, and the power supply VS12V is output from the second end of the inductor L1. At the same time, the power supply voltage output by the body diode of the field effect transistor Q2 is connected to the ground end of the 12V power supply through the resistor R3 and the resistor R4. At this time, the voltage U0 obtained by the gate of the field effect transistor Q2 makes the field effect transistor Q2 turn on. U0 represents the voltage value of the gate G of the field effect transistor Q2, and V0 represents the voltage value output by the 12V power supply. Vd represents the conduction voltage value of the body diode of the field-effect transistor Q2, R3 represents the resistance value of the resistor R3, and R4 represents the resistance value of the resistor R4; when the control terminal PE1 of the controller U2 sends a conduction level to the gate G of the field-effect transistor Q8, the field-effect transistor Q8 is in the conduction state, and the voltage of the gate G of the field-effect transistor Q2 is pulled down. At this time, the field-effect transistor Q2 is in the cut-off state, and the 12V power supply outputs through the body diode of the field-effect transistor Q2; when the control terminal PE1 of the controller U2 sends a cut-off level to the gate G of the field-effect transistor Q8, the field-effect transistor Q8 is in the cut-off state, and the power supply voltage output by the body diode of the field-effect transistor Q2 is connected to the ground terminal of the 12V power supply through the resistor R3 and the resistor R4. At this time, the voltage U0 obtained by the gate of the field-effect transistor Q2 makes the field-effect transistor Q2 conduct, and the field-effect transistor Q2 outputs power to charge the capacitor C4; the transient suppression diode D2 is used to prevent the surge protection circuit from being damaged.

[0008] In a preferred embodiment of the present invention, the temperature module includes a first temperature module, a second temperature module, a third temperature module, a fourth temperature module, and a fifth temperature module;

[0009] The first temperature module includes: the temperature sensing signal terminal AN0_3 of the controller U2 is connected to the first end of the resistor R7, the second end of the resistor R7, the first end of the resistor R9, and the first end of the thermistor RT1 are connected, the second end of the resistor R9 is connected to the power supply ground GND, the second end of the thermistor RT1 is connected to the first end of the inductor L2 and the negative electrode of the diode D11, the first end of the inductor L2 outputs the power supply VI_3V, the second end of the inductor L2 is connected to the first end of the capacitor C19 and the power supply +3.3V, and the positive electrode of the diode D11 and the second end of the capacitor C19 are connected to the power supply ground GND;

[0010] The second temperature module includes: the first end of the thermistor RT2 is connected to the power supply VI_3V, the second end of the thermistor RT2 is connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is connected to the temperature sensing signal terminal AN0_4 of the controller U2, and the second end of the resistor R11 is connected to the power supply ground GND;

[0011] The third temperature module includes: the first end of the thermistor RT3 is connected to the power supply VI_3V, the second end of the thermistor RT3 is connected to the first end of the resistor R12 and the first end of the resistor R14, the second end of the resistor R14 is connected to the power supply ground GND, and the second end of the resistor R12 is connected to the temperature sensing signal terminal AN1_3 of the controller U2;

[0012] The fourth temperature module includes: the first end of the thermistor RT4 is connected to the power supply VI_3V, the second end of the thermistor RT4 is connected to the first end of the resistor R16 and the first end of the resistor R17, the second end of the resistor R17 is connected to the power supply ground GND, and the second end of the resistor R16 is connected to the temperature sensing signal terminal PT2 of the controller U2;

[0013] The fifth temperature module includes: the first end of the thermistor RT5 is connected to the power supply VI_3V, the second end of the thermistor RT5 is connected to the first end of the resistor R18 and the first end of the resistor R20, the second end of the resistor R20 is connected to the power supply ground GND, and the second end of the resistor R18 is connected to the temperature sensing signal terminal PT3 of the controller U2. The thermistor RT1 is arranged at the first inlet end of the first three-way proportional valve for detecting the temperature value of the first cold heat source; the thermistor RT2 is arranged at the second inlet end of the first three-way proportional valve for detecting the temperature value of the second cold heat source; the thermistor RT3 is arranged at the outlet end of the first three-way proportional valve, or the thermistor RT3 can be arranged at the first inlet end of the second three-way proportional valve, or the thermistor RT3 can be arranged at the inlet end of the water pump, or the thermistor RT3 can be arranged at the outlet end of the water pump for detecting the temperature value after the first cold heat source and the second cold heat source are mixed; the thermistor RT4 is arranged at the second inlet end of the second three-way proportional valve for detecting the temperature value of the third cold heat source; the thermistor RT5 is arranged at the outlet end of the second three-way proportional valve for detecting the temperature value of the output fluid.

[0014] In a preferred embodiment of the present invention, the four-way proportional valve module includes: the input end IN1 of the proportional valve U4 is connected to the output end PAD3 of the controller U3, the input end IN2 of the proportional valve U4 is connected to the output end PAD4 of the controller U3, the analog terminal VREF of the proportional valve U4 is connected to the first end of the capacitor C18 and the first end of the resistor R33, the second end of the capacitor C18 is connected to the power supply ground GND, the second end of the resistor R33 is connected to the control terminal PT1 of the controller U3, the power supply ground terminal GND of the proportional valve U4 is connected to the power supply ground GND, the power supply terminal VBB of the proportional valve U4 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U4 is connected to the first end of the resistor R28, the second end of the resistor R28 is connected to the power supply ground GND, the output end OUT1 of the proportional valve U4 is connected to the interface 1 of the connector P1, and the output end OUT2 of the proportional valve U4 is connected to the interface 2 of the connector P1;

[0015] The input terminal IN1 of the proportional valve U5 is connected to the output terminal PAD8 of the controller U3. The input terminal IN2 of the proportional valve U5 is connected to the output terminal LD0 of the controller U3. The analog terminal VREF of the proportional valve U5 is connected to the first terminal of the capacitor C19 and the first terminal of the resistor R34. The second terminal of the capacitor C19 is connected to the power ground GND. The second terminal of the resistor R34 is connected to the control terminal PT2 of the controller U3. The power ground terminal GND of the proportional valve U5 is connected to the power ground GND. The power supply terminal VBB of the proportional valve U5 is connected to the power supply VIN. The sense resistor terminal LSS of the proportional valve U5 is connected to the first terminal of the resistor R30. The second terminal of the resistor R30 is connected to the power ground GND. The output terminal OUT1 of the proportional valve U5 is connected to interface 3 of the connector P1. The output terminal OUT2 of the proportional valve U5 is connected to interface 4 of the connector P1;

[0016] The input terminal IN1 of the proportional valve U6 is connected to the output terminal PS0 of the controller U3. The input terminal IN2 of the proportional valve U6 is connected to the output terminal PS1 of the controller U3. The analog terminal VREF of the proportional valve U6 is connected to the first terminal of the capacitor C26 and the first terminal of the resistor R48. The second terminal of the capacitor C26 is connected to the power ground. The second terminal of the resistor R48 is connected to the control terminal PT3 of the controller U3. The power ground terminal GND of the proportional valve U6 is connected to the power ground GND. The power supply terminal VBB of the proportional valve U6 is connected to the power supply VIN. The sense resistor terminal LSS of the proportional valve U6 is connected to the first terminal of the resistor R37. The second terminal of the resistor R37 is connected to the power ground GND. The output terminal OUT1 of the proportional valve U6 is connected to interface 1 of the connector P2. The output terminal OUT2 of the proportional valve U6 is connected to interface 2 of the connector P2;

[0017] The input terminal IN1 of the proportional valve U7 is connected to the output terminal PS2 of the controller U3, the input terminal IN2 of the proportional valve U7 is connected to the output terminal PS3 of the controller U3, the analog terminal VREF of the proportional valve U7 is connected to the first terminal of the capacitor C27 and the first terminal of the resistor R53, the second terminal of the capacitor C27 is connected to the power ground GND, the second terminal of the resistor R53 is connected to the control terminal PP1 of the controller U3, the power ground terminal GND of the proportional valve U7 is connected to the power ground GND, the power supply terminal VBB of the proportional valve U7 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U7 is connected to the first terminal of the resistor R40, the second terminal of the resistor R40 is connected to the power ground GND, the output terminal OUT1 of the proportional valve U7 is connected to the interface 3 of the connector P2, and the output terminal OUT2 of the proportional valve U7 is connected to the interface 4 of the connector P2. Connect the connector P1 to the valve opening control terminal on the first three-way proportional valve, and connect the connector P2 to the valve opening control terminal on the second three-way proportional valve. The controller U3 sends opening size control signals to the first three-way proportional valve and the second three-way proportional valve respectively through the proportional valves U4, U5, U6, and U7 (the proportional valves U4, U5, U6, and U7 are all proportional valve driver chips), so that the opening degrees of the inlet and outlet channels on the first three-way proportional valve and the second three-way proportional valve reach the control values.

[0018] In a preferred embodiment of the present invention, it further includes an LED display module disposed on the PCB circuit board. The LED display module includes: the display terminal PP0 of the controller U3 is connected to the first terminal of the resistor R54, the second terminal of the resistor R54 is connected to the positive electrode of the light-emitting diode LED1, and the negative electrode of the light-emitting diode LED1 is connected to the power ground GND; when the light-emitting diode LED1 is lit and emits red light, it indicates that the controller U3 has a fault and the controller U3 needs to be restarted.

[0019] Or / and it further includes a software update module disposed on the PCB circuit board. The software update module includes: the data terminal LD2 of the controller U3 is connected to the data terminal 5 of the update interface H1, the data terminal LD1 of the controller U3 is connected to the data terminal 3 of the update interface H1, the debug terminal BKGD of the controller U3 is connected to the debug terminal 1 of the update interface H1, the power supply terminal 6 of the update interface H1 is connected to the power supply VDDX, the reset terminal 4 of the update interface H1 is connected to the first terminal of the resistor R60, the first terminal of the capacitor C30, and the reset terminal RESET of the controller U3, the second terminal of the resistor R60 is connected to the power supply VDDX, and the power ground terminal 2 of the update interface H1 is connected to the power ground GND and the second terminal of the capacitor C30. Connecting the data line to the update interface H1 can realize the update of the system of the controller U3.

[0020] In a preferred embodiment of the present invention, the motor drive module includes: the drive terminal HG0 of the controller U3 is connected to the first end of the resistor R5 and the cathode of the diode D4; the second end of the resistor R5 is connected to the gate G of the field effect transistor Q1 and the first end of the resistor R6; the second end of the resistor R6 is connected to the anode of the diode D4; the drain D of the field effect transistor Q1 is connected to the power supply VS12V; the source S of the field effect transistor Q1 is connected to the drain D of the field effect transistor Q4, the first end of the resistor R13, and the first end of the drive motor interface; the drive terminal LG0 of the controller U3 is connected to the cathode of the diode D6 and the first end of the resistor R9; the second end of the resistor R9 is connected to the gate G of the field effect transistor Q4 and the first end of the resistor R10; the second end of the resistor R10 is connected to the anode of the diode D6; the source S of the field effect transistor Q4 is connected to the loop ground terminal LS0 of the controller U3 and the first end of the resistor PR1; the second end of the resistor PR1 is connected to the power supply ground;

[0021] The power capacitor terminal HS0 of the controller U3 is connected to the first end of the capacitor C11, the second end of the resistor R13, and the first end of the capacitor C12; the second end of the capacitor C11 is connected to the cathode of the diode D7 and the power capacitor terminal VBS0 of the controller U3; the anode of the diode D7 is connected to the first end of the capacitor C13 and the power capacitor terminal VLS0 of the controller U3; the second end of the capacitor C13 is connected to the second end of the capacitor C12 and the power supply ground GND;

[0022] The drive terminal HG1 of the controller U3 is connected to the first end of the resistor R19 and the cathode of the diode D8; the anode of the diode D8 is connected to the first end of the resistor R21; the second end of the resistor R21 is connected to the second end of the resistor R19 and the gate G of the field effect transistor Q5; the drain D of the field effect transistor Q5 is connected to the power supply VS12V; the source S of the field effect transistor Q5 is connected to the drain D of the field effect transistor Q6, the first end of the resistor R29, and the second end of the drive motor interface; the gate G of the field effect transistor Q6 is connected to the first end of the resistor R25 and the first end of the resistor R27; the second end of the resistor R25 is connected to the drive terminal LG1 of the controller U3 and the cathode of the diode D9; the second end of the resistor R27 is connected to the anode of the diode D9; the source S of the field effect transistor Q6 is connected to the loop ground terminal LS1 of the controller U3 and the first end of the resistor PR2; the second end of the resistor PR2 is connected to the power supply ground;

[0023] The power capacitor terminal HS1 of the controller U3 is connected to the first end of the capacitor C15, the first end of the capacitor C16, and the second end of the resistor R29; the second end of the capacitor C15 is connected to the cathode of the diode D10 and the power capacitor terminal VBS1 of the controller U3; the anode of the diode D10 is connected to the first end of the capacitor C17 and the power capacitor terminal VLS1 of the controller U3; the second end of the capacitor C17 is connected to the second end of the capacitor C16 and the power supply ground GND;

[0024] The driving end HG2 of the controller U3 is connected to the negative electrode of the diode D11 and the first end of the resistor R31. The second end of the resistor R31 is connected to the first end of the resistor R32 and the gate G of the field effect transistor Q7. The positive electrode of the diode D11 is connected to the second end of the resistor R32. The drain D of the field effect transistor Q7 is connected to the power supply VS12V. The source S of the field effect transistor Q7 is connected to the drain D of the field effect transistor Q8, the first end of the resistor R39, and the third end of the motor drive interface. The gate G of the field effect transistor Q8 is connected to the first end of the resistor R35 and the first end of the resistor R36. The second end of the resistor R35 is connected to the control end LG2 of the controller U3 and the negative electrode of the diode D13. The positive electrode of the diode D13 is connected to the second end of the resistor R36. The source S of the field effect transistor Q8 is connected to the first end of the resistor R38 and the loop ground end LS2 of the controller U3. The second end of the resistor R38 is connected to the power supply ground GND;

[0025] The power supply capacitor end HS2 of the controller U3 is connected to the first end of the capacitor C21, the second end of the resistor R39, and the first end of the capacitor C22. The second end of the capacitor C21 is connected to the power supply capacitor end VBS2 of the controller U3 and the negative electrode of the diode D14. The positive electrode of the diode D14 is connected to the first end of the capacitor C23 and the power supply capacitor end VLS2 of the controller U3. The second end of the capacitor C23 is connected to the second end of the capacitor C22 and the power supply ground GND. Connect the power supply end of the three-phase stepper motor on the water pump to the drive motor interface, and send alternating level signals to the water pump through the controller U3 to make the water pump work.

[0026] In a preferred embodiment of the present invention, it further includes a motor sampling module disposed on the PCB circuit board. The motor sampling module includes: the first end of the resistor R43 is connected to the first end of the resistor PR1. The second end of the resistor R43 is connected to the first end of the resistor R44 and the first end of the capacitor C25. The second end of the resistor R44 is connected to the first end of the resistor R45 and the sampling input positive end PAD2 of the controller U3. The second end of the resistor R45 is connected to the power supply 2V5_REF. The first end of the resistor R50 is connected to the second end of the resistor PR1. The second end of the resistor R50 is connected to the second end of the capacitor C25 and the first end of the resistor R51. The second end of the resistor R51 is connected to the sampling input negative end PAD1 of the controller U3 and the first end of the resistor R52. The second end of the resistor R52 is connected to the sampling voltage end PAD0 of the controller U3 and the first end of the capacitor C14. The second end of the capacitor C14 is connected to the power supply ground;

[0027] The first end of resistor R57 is connected to the first end of resistor PR2. The second end of resistor R57 is connected to the first end of capacitor C29 and the first end of resistor R58. The second end of resistor R58 is connected to the first end of resistor R59 and the positive sampling input terminal PAD7 of controller U3. The second end of resistor R59 is connected to power supply 2V5_REF. The first end of resistor R63 is connected to the second end of resistor PR2. The second end of resistor R63 is connected to the second end of capacitor C29 and the first end of resistor R64. The second end of resistor R64 is connected to the first end of resistor R65 and the negative sampling input terminal PA6 of controller U3. The second end of resistor R65 is connected to the first end of capacitor C9 and the sampling voltage terminal PAD5 of controller U3. The second end of capacitor C9 is connected to the power supply ground. The current / voltage signal during the operation of the motor is collected by the motor sampling module to determine whether the motor is working properly.

[0028] In a preferred embodiment of the present invention, the data communication module includes a first data communication module and / or a second data communication module;

[0029] The first data communication module includes: the data communication terminal PE1 of controller U3 is connected to the first ends of resistor R47, resistor R41 and resistor R42. The second end of resistor R42 is connected to the cathode of diode D15. The anode of diode D15 is connected to power supply VSUP. The second end of resistor R41 is connected to the power supply ground GND, the first end of transient suppression diode D16 and the first end of capacitor C24. The second end of transient suppression diode D16 is connected to the first end of resistor R46, the second end of capacitor C24 and the second end of resistor R47. The second end of resistor R46 is connected to interface 1 of communication connector PWM1;

[0030] The data communication terminal PT0 of controller U3 is connected to the first end of resistor R61. The second end of resistor R61 is connected to the first end of resistor R62 and the gate G of field effect transistor Q9. The drain D of field effect transistor Q9 is connected to the first ends of resistor R55 and resistor R56. The second end of resistor R55 is connected to the cathode of diode D17. The anode of diode D17 is connected to power supply VSUP. The second end of resistor R56 is connected to the first end of capacitor C28, the first end of transient suppression diode D18 and the first end of resistor R49. The second end of resistor R49 is connected to interface 2 of communication connector FG1. The second end of resistor R62 is connected to the source of field effect transistor Q9, the second end of capacitor C28, the second end of transient suppression diode D18 and the power supply ground GND;

[0031] The second data communication module includes: the data terminal D of the CAN driver U1 is connected to the data terminal CANH0 of the controller U3, the data terminal R of the CAN driver U1 is connected to the data terminal CANL0 of the controller U3, the power supply terminal VCC of the CAN driver U1 is connected to the power supply VI_3V, the power ground terminal GND of the CAN driver U1 is connected to the power ground GND and the first terminal of the capacitor C7, the second terminal of the capacitor C7 is connected to the reference voltage terminal Vref of the CAN driver U1, the low-level CAN voltage input / output terminal CANL of the CAN driver U1 is connected to the first terminal of the conjugate inductor L2, the high-level CAN voltage input / output terminal CANH of the CAN driver U1 is connected to the second terminal of the conjugate inductor L2, the slope resistor terminal Rs of the CAN driver U1 is connected to the first terminal of the resistor R2, the second terminal of the resistor R2 is connected to the power ground GND, the third terminal of the inductor L2 is connected to the first terminal of the capacitor C2, the first terminal of the capacitor C5, the first terminal of the terminal resistor R3, the first terminal of the resistor R4 and the first terminal of the transient suppression diode group D1, the second terminal of the resistor R4 is connected to the interface 1 of the communication connector FG1, the second terminal of the transient suppression diode D1 is connected to the first terminal of the resistor R1, the second terminal of the resistor R3 and the fourth terminal of the conjugate inductor L2, the second terminal of the resistor R1 is connected to the interface 2 of the communication connector PWM1, the second terminal of the capacitor C2 is connected to the first terminal of the capacitor C6, and the second terminal of the capacitor C6 is connected to the second terminal of the capacitor C5, the third terminal of the transient suppression diode D1 and the power ground GND. By selecting the data transmission methods to be connected: CAN bus communication and PWM communication, the data communication line is connected to the corresponding communication connectors PWM1 and FG1 to achieve data interaction.

[0032] The present invention also discloses an automotive four-way water pump control system, which includes a water pump and a pair of three-way proportional valves, namely a first three-way proportional valve and a second three-way proportional valve, and also includes the automotive four-way water pump controller according to any one of claims 1 to 8;

[0033] The motor drive end of the water pump is connected to the motor drive end of the automotive four-way water pump controller, the control end of the first three-way proportional valve is connected to the first control end of the automotive four-way water pump controller, and the control end of the second three-way proportional valve is connected to the second control end of the automotive four-way water pump controller;

[0034] The first inlet end of the first three-way proportional valve is connected to the first cold heat source, the second inlet end of the first three-way proportional valve is connected to the second cold heat source, the outlet end of the first three-way proportional valve is connected to the inlet end of the water pump, the outlet end of the water pump is connected to the first inlet end of the second three-way proportional valve, the second inlet end of the second three-way proportional valve is connected to the third cold heat source, and the outlet end of the second three-way proportional valve is connected to the conveying pipeline. According to the temperature value collected by the temperature module, the opening degrees of the first three-way proportional valve and the second three-way proportional valve are controlled to achieve the regulation of the fluid temperature.

[0035] The present invention also discloses a working method of an automotive four-way water pump control system, including the following steps:

[0036] S-1, system initialization;

[0037] S-2, the controller U3 obtains the temperature value collected by the temperature module;;

[0038] S-3, the controller U3 adjusts the temperature value of the output fluid according to the obtained temperature value; specifically including the following steps:

[0039] S-31, obtain the temperature of the liquid to be output;

[0040] S-32, adjust the opening degrees of the first inlet end and the second inlet end of the first three-way proportional valve;

[0041] S-34, adjust the opening degrees of the first inlet end and the second inlet end of the second three-way proportional valve;

[0042] S-35, judge the magnitude relationship between the temperature detected at the outlet end of the second three-way proportional valve and φ0:

[0043] If φ5 - φ0 ≤ φ, then keep the opening degrees of the first inlet end of the first three-way proportional valve, the second inlet end of the first three-way proportional valve, the first inlet end of the second three-way proportional valve, and the second inlet end of the second three-way proportional valve;

[0044] If φ5 - φ0 > φ, then increase the opening degree of the second inlet end of the second three-way proportional valve, or increase the opening degree of the second inlet end of the first three-way proportional valve, or decrease and increase the opening degree of the first inlet end of the first three-way proportional valve, and return to step S-32.

[0045] In summary, due to the adoption of the above technical solutions, the present invention can integrate the automotive four-way water pump controller and achieve constant-temperature regulated output.

[0046] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0048] Figure 1 is a schematic block diagram of the connection of the present invention.

[0049] Figure 2 is a schematic circuit connection diagram of the present invention.

[0050] Figure 3 It is a schematic diagram of the process of the water pump control task A of the present invention.

[0051] Figure 4 It is a schematic diagram of the process of the proportional valve task C of the present invention.

[0052] Figure 5 It is a schematic diagram of the process of the proportional valve task A of the present invention.

[0053] Figure 6 It is a schematic diagram of the temperature input process of the proportional valve of the present invention.

[0054] Figure 7 It is a schematic diagram of the position input process of the proportional valve of the present invention. Detailed implementation manners

[0055] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0056] The present invention provides an automotive four-way water pump controller, including a box body, a PCB circuit board fixed mounting seat arranged in the box body for fixedly mounting a PCB circuit board, and the PCB circuit board is fixedly mounted on the PCB circuit board fixed mounting seat, as Figure 1 shown, a controller module, a temperature module, a motor drive module, a four-way proportional valve module and a data communication module are arranged on the PCB circuit board;

[0057] The temperature sensing signal end of the controller module is connected to the temperature sensing signal end of the temperature module, the driving end of the controller module is connected to the driving end of the motor drive module, the control end of the controller module is connected to the control end of the four-way proportional valve module, and the data transmission end of the controller module is connected to the data transmission end of the data communication module.

[0058] In a preferred embodiment of the present invention, it further includes a power module disposed on the PCB circuit board. The power module includes: the power capacitor terminal CP of the controller U3 is connected to the first end of the capacitor C8. The second end of the capacitor C8 is connected to the negative electrode of the diode D2 and the positive electrode of the diode D5. The positive electrode of the diode D2 is connected to the first end of the inductor L1, the first end of the resistor R7, the first end of the capacitor C10, and the drain D of the field effect transistor Q3. The second end of the inductor L1 is connected to the first end of the capacitor C3, the first end of the capacitor C4, and the first end of the capacitor C1. The second end of the inductor L1 outputs the power supply VS12V. The second end of the capacitor C3 is connected to the second end of the capacitor C4, the second end of the capacitor C1, and the power supply ground GND. The negative electrode of the diode D5 is connected to the second end of the capacitor C10 and the power capacitor terminal VCP of the controller U3. The gate G of the field effect transistor Q3, the second end of the resistor R7, the first end of the resistor R8, and the drain D of the field effect transistor Q2 are connected. The source S of the field effect transistor Q3 is connected to interface 2 of the power supply interface VSUP1, interface 1 of the power supply interface VSUP1, and the first end of the transient suppression diode D3. Interface 1 of the power supply interface VSUP1 outputs the power supply VSUP. The second end of the transient suppression diode D3 is connected to interface 2 of the power supply ground interface GND1, interface 1 of the power supply ground interface GND1, the power supply ground GND, and the second end of the resistor R8. The source S of the field effect transistor Q2 is connected to the power supply ground GND. The gate G of the field effect transistor Q2 is connected to the first end of the resistor R11. The second end of the resistor R11 is connected to the power control terminal PE0 of the controller U3.

[0059] In a preferred embodiment of the present invention, the temperature module includes a first temperature module, a second temperature module, a third temperature module, a fourth temperature module, and a fifth temperature module;

[0060] The first temperature module includes: As Figure 2 shown, the temperature sensing signal terminal AN0_3 of the controller U2 is connected to the first end of the resistor R7. The second end of the resistor R7, the first end of the resistor R9, and the first end of the thermistor RT1 are connected. The second end of the resistor R9 is connected to the power supply ground GND. The second end of the thermistor RT1 is connected to the first end of the inductor L2 and the negative electrode of the diode D11. The first end of the inductor L2 outputs the power supply VI_3V. The second end of the inductor L2 is connected to the first end of the capacitor C19 and the power supply +3.3V. The positive electrode of the diode D11 and the second end of the capacitor C19 are connected to the power supply ground GND;

[0061] The second temperature module includes: The first end of the thermistor RT2 is connected to the power supply VI_3V. The second end of the thermistor RT2 is connected to the first end of the resistor R10 and the first end of the resistor R11. The second end of the resistor R10 is connected to the temperature sensing signal terminal AN0_4 of the controller U2. The second end of the resistor R11 is connected to the power supply ground GND;

[0062] The third temperature module includes: the first end of the thermistor RT3 is connected to the power supply VI_3V, the second end of the thermistor RT3 is connected to the first ends of the resistor R12 and the resistor R14, the second end of the resistor R14 is connected to the power supply ground GND, and the second end of the resistor R12 is connected to the temperature sensing signal terminal AN1_3 of the controller U2;

[0063] The fourth temperature module includes: the first end of the thermistor RT4 is connected to the power supply VI_3V, the second end of the thermistor RT4 is connected to the first ends of the resistor R16 and the resistor R17, the second end of the resistor R17 is connected to the power supply ground GND, and the second end of the resistor R16 is connected to the temperature sensing signal terminal PT2 of the controller U2;

[0064] The fifth temperature module includes: the first end of the thermistor RT5 is connected to the power supply VI_3V, the second end of the thermistor RT5 is connected to the first ends of the resistor R18 and the resistor R20, the second end of the resistor R20 is connected to the power supply ground GND, and the second end of the resistor R18 is connected to the temperature sensing signal terminal PT3 of the controller U2.

[0065] In a preferred embodiment of the present invention, the four-way proportional valve module includes: the input end IN1 of the proportional valve U4 is connected to the output end PAD3 of the controller U3, the input end IN2 of the proportional valve U4 is connected to the output end PAD4 of the controller U3, the analog terminal VREF of the proportional valve U4 is connected to the first ends of the capacitor C18 and the resistor R33, the second end of the capacitor C18 is connected to the power supply ground GND, the second end of the resistor R33 is connected to the control terminal PT1 of the controller U3, the power supply ground terminal GND of the proportional valve U4 is connected to the power supply ground GND, the power supply terminal VBB of the proportional valve U4 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U4 is connected to the first end of the resistor R28, the second end of the resistor R28 is connected to the power supply ground GND, the output end OUT1 of the proportional valve U4 is connected to the interface 1 of the connector P1, and the output end OUT2 of the proportional valve U4 is connected to the interface 2 of the connector P1;

[0066] The input terminal IN1 of the proportional valve U5 is connected to the output terminal PAD8 of the controller U3, the input terminal IN2 of the proportional valve U5 is connected to the output terminal LD0 of the controller U3, the analog terminal VREF of the proportional valve U5 is connected to the first terminal of the capacitor C19 and the first terminal of the resistor R34, the second terminal of the capacitor C19 is connected to the power ground GND, the second terminal of the resistor R34 is connected to the control terminal PT2 of the controller U3, the power ground terminal GND of the proportional valve U5 is connected to the power ground GND, the power supply terminal VBB of the proportional valve U5 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U5 is connected to the first terminal of the resistor R30, the second terminal of the resistor R30 is connected to the power ground GND, the output terminal OUT1 of the proportional valve U5 is connected to the interface 3 of the connector P1, and the output terminal OUT2 of the proportional valve U5 is connected to the interface 4 of the connector P1;

[0067] The input terminal IN1 of the proportional valve U6 is connected to the output terminal PS0 of the controller U3, the input terminal IN2 of the proportional valve U6 is connected to the output terminal PS1 of the controller U3, the analog terminal VREF of the proportional valve U6 is connected to the first terminal of the capacitor C26 and the first terminal of the resistor R48, the second terminal of the capacitor C26 is connected to the power ground, the second terminal of the resistor R48 is connected to the control terminal PT3 of the controller U3, the power ground terminal GND of the proportional valve U6 is connected to the power ground GND, the power supply terminal VBB of the proportional valve U6 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U6 is connected to the first terminal of the resistor R37, the second terminal of the resistor R37 is connected to the power ground GND, the output terminal OUT1 of the proportional valve U6 is connected to the interface 1 of the connector P2, and the output terminal OUT2 of the proportional valve U6 is connected to the interface 2 of the connector P2;

[0068] The input terminal IN1 of the proportional valve U7 is connected to the output terminal PS2 of the controller U3, the input terminal IN2 of the proportional valve U7 is connected to the output terminal PS3 of the controller U3, the analog terminal VREF of the proportional valve U7 is connected to the first terminal of the capacitor C27 and the first terminal of the resistor R53, the second terminal of the capacitor C27 is connected to the power ground GND, the second terminal of the resistor R53 is connected to the control terminal PP1 of the controller U3, the power ground terminal GND of the proportional valve U7 is connected to the power ground GND, the power supply terminal VBB of the proportional valve U7 is connected to the power supply VIN, the detection resistor terminal LSS of the proportional valve U7 is connected to the first terminal of the resistor R40, the second terminal of the resistor R40 is connected to the power ground GND, the output terminal OUT1 of the proportional valve U7 is connected to the interface 3 of the connector P2, and the output terminal OUT2 of the proportional valve U7 is connected to the interface 4 of the connector P2.

[0069] In a preferred embodiment of the present invention, it further includes an LED display module disposed on the PCB circuit board. The LED display module includes: the display terminal PP0 of the controller U3 is connected to the first end of the resistor R54, the second end of the resistor R54 is connected to the positive electrode of the light-emitting diode LED1, and the negative electrode of the light-emitting diode LED1 is connected to the power ground GND;

[0070] Or / and it further includes a software update module disposed on the PCB circuit board. The software update module includes: the data terminal LD2 of the controller U3 is connected to the data terminal 5 of the update interface H1, the data terminal LD1 of the controller U3 is connected to the data terminal 3 of the update interface H1, the debugging terminal BKGD of the controller U3 is connected to the debugging terminal 1 of the update interface H1, the power terminal 6 of the update interface H1 is connected to the power supply VDDX, the reset terminal 4 of the update interface H1 is connected to the first end of the resistor R60, the first end of the capacitor C30, and the reset terminal RESET of the controller U3. The second end of the resistor R60 is connected to the power supply VDDX, and the power ground terminal 2 of the update interface H1 is connected to the power ground GND and the second end of the capacitor C30.

[0071] In a preferred embodiment of the present invention, the motor drive module includes: the drive terminal HG0 of the controller U3 is connected to the first end of the resistor R5 and the negative electrode of the diode D4. The second end of the resistor R5 is connected to the gate G of the field effect transistor Q1 and the first end of the resistor R6. The second end of the resistor R6 is connected to the positive electrode of the diode D4. The drain D of the field effect transistor Q1 is connected to the power supply VS12V. The source S of the field effect transistor Q1 is connected to the drain D of the field effect transistor Q4, the first end of the resistor R13, and the first end of the drive motor interface. The drive terminal LG0 of the controller U3 is connected to the negative electrode of the diode D6 and the first end of the resistor R9. The second end of the resistor R9 is connected to the gate G of the field effect transistor Q4 and the first end of the resistor R10. The second end of the resistor R10 is connected to the positive electrode of the diode D6. The source S of the field effect transistor Q4 is connected to the loop ground terminal LS0 of the controller U3 and the first end of the resistor PR1. The second end of the resistor PR1 is connected to the power ground.

[0072] The power capacitor terminal HS0 of the controller U3 is connected to the first end of the capacitor C11, the second end of the resistor R13, and the first end of the capacitor C12. The second end of the capacitor C11 is connected to the negative electrode of the diode D7 and the power capacitor terminal VBS0 of the controller U3. The positive electrode of the diode D7 is connected to the first end of the capacitor C13 and the power capacitor terminal VLS0 of the controller U3. The second end of the capacitor C13 is connected to the second end of the capacitor C12 and the power ground GND.

[0073] The driving end HG1 of controller U3 is connected to the first end of resistor R19 and the cathode of diode D8. The anode of diode D8 is connected to the first end of resistor R21. The second end of resistor R21 is connected to the second end of resistor R19 and the gate G of field effect transistor Q5. The drain D of field effect transistor Q5 is connected to power supply VS12V. The source S of field effect transistor Q5 is connected to the drain D of field effect transistor Q6, the first end of resistor R29, and the second end of the drive motor interface. The gate G of field effect transistor Q6 is connected to the first end of resistor R25 and the first end of resistor R27. The second end of resistor R25 is connected to the driving end LG1 of controller U3 and the cathode of diode D9. The second end of resistor R27 is connected to the anode of diode D9. The source S of field effect transistor Q6 is connected to the loop ground terminal LS1 of controller U3 and the first end of resistor PR2. The second end of resistor PR2 is connected to the power ground;

[0074] The power capacitor terminal HS1 of controller U3 is connected to the first end of capacitor C15, the first end of capacitor C16, and the second end of resistor R29. The second end of capacitor C15 is connected to the cathode of diode D10 and the power capacitor terminal VBS1 of controller U3. The anode of diode D10 is connected to the first end of capacitor C17 and the power capacitor terminal VLS1 of controller U3. The second end of capacitor C17 is connected to the second end of capacitor C16 and the power ground GND;

[0075] The driving end HG2 of controller U3 is connected to the cathode of diode D11 and the first end of resistor R31. The second end of resistor R31 is connected to the first end of resistor R32 and the gate G of field effect transistor Q7. The anode of diode D11 is connected to the second end of resistor R32. The drain D of field effect transistor Q7 is connected to power supply VS12V. The source S of field effect transistor Q7 is connected to the drain D of field effect transistor Q8, the first end of resistor R39, and the third end of the motor drive interface. The gate G of field effect transistor Q8 is connected to the first end of resistor R35 and the first end of resistor R36. The second end of resistor R35 is connected to the control end LG2 of controller U3 and the cathode of diode D13. The positive electrode of diode D13 is connected to the second end of resistor R36. The source S of field effect transistor Q8 is connected to the first end of resistor R38 and the loop ground terminal LS2 of controller U3. The second end of resistor R38 is connected to the power ground GND;

[0076] The power capacitor terminal HS2 of controller U3 is connected to the first end of capacitor C21, the second end of resistor R39, and the first end of capacitor C22. The second end of capacitor C21 is connected to the power capacitor terminal VBS2 of controller U3 and the cathode of diode D14. The anode of diode D14 is connected to the first end of capacitor C23 and the power capacitor terminal VLS2 of controller U3. The second end of capacitor C23 is connected to the second end of capacitor C22 and the power ground GND.

[0077] In a preferred embodiment of the present invention, it further includes a motor sampling module disposed on the PCB circuit board. The motor sampling module includes: the first end of resistor R43 is connected to the first end of resistor PR1, the second end of resistor R43 is connected to the first end of resistor R44 and the first end of capacitor C25, the second end of resistor R44 is connected to the first end of resistor R45 and the positive sampling input terminal PAD2 of controller U3, the second end of resistor R45 is connected to power supply 2V5_REF, the first end of resistor R50 is connected to the second end of resistor PR1, the second end of resistor R50 is connected to the second end of capacitor C25 and the first end of resistor R51, the second end of resistor R51 is connected to the negative sampling input terminal PAD1 of controller U3 and the first end of resistor R52, the second end of resistor R52 is connected to the sampling voltage terminal PAD0 of controller U3 and the first end of capacitor C14, and the second end of capacitor C14 is connected to the power supply ground;

[0078] The first end of resistor R57 is connected to the first end of resistor PR2, the second end of resistor R57 is connected to the first end of capacitor C29 and the first end of resistor R58, the second end of resistor R58 is connected to the first end of resistor R59 and the positive sampling input terminal PAD7 of controller U3, the second end of resistor R59 is connected to power supply 2V5_REF, the first end of resistor R63 is connected to the second end of resistor PR2, the second end of resistor R63 is connected to the second end of capacitor C29 and the first end of resistor R64, the second end of resistor R64 is connected to the first end of resistor R65 and the negative sampling input terminal PA6 of controller U3, the second end of resistor R65 is connected to the first end of capacitor C9 and the sampling voltage terminal PAD5 of controller U3, and the second end of capacitor C9 is connected to the power supply ground.

[0079] In a preferred embodiment of the present invention, the data communication module includes a data communication first module or / and a data communication second module;

[0080] The data communication first module includes: the data communication terminal PE1 of controller U3 is connected to the first end of resistor R47, the first end of resistor R41, and the first end of resistor R42. The second end of resistor R42 is connected to the negative electrode of diode D15, the positive electrode of diode D15 is connected to power supply VSUP, the second end of resistor R41 is connected to power supply ground GND, the first end of transient suppression diode D16, and the first end of capacitor C24. The second end of transient suppression diode D16 is connected to the first end of resistor R46, the second end of capacitor C24, and the second end of resistor R47. The second end of resistor R46 is connected to interface 1 of communication connector PWM1;

[0081] The data communication terminal PT0 of the controller U3 is connected to the first end of the resistor R61. The second end of the resistor R61 is connected to the first end of the resistor R62 and the gate G of the field effect transistor Q9. The drain D of the field effect transistor Q9 is connected to the first ends of the resistor R55 and the resistor R56. The second end of the resistor R55 is connected to the negative electrode of the diode D17. The positive electrode of the diode D17 is connected to the power supply VSUP. The second end of the resistor R56 is connected to the first end of the capacitor C28, the first end of the transient suppression diode D18, and the first end of the resistor R49. The second end of the resistor R49 is connected to the interface 2 of the communication connector FG1. The second end of the resistor R62 is connected to the source of the field effect transistor Q9, the second end of the capacitor C28, the second end of the transient suppression diode D18, and the power supply ground GND;

[0082] The second data communication module includes: the data terminal D of the CAN driver U1 is connected to the data terminal CANH0 of the controller U3. The data terminal R of the CAN driver U1 is connected to the data terminal CANL0 of the controller U3. The power supply terminal VCC of the CAN driver U1 is connected to the power supply VI_3V. The power supply ground terminal GND of the CAN driver U1 is connected to the power supply ground GND and the first end of the capacitor C7. The second end of the capacitor C7 is connected to the reference voltage terminal Vref of the CAN driver U1. The low-level CAN voltage input / output terminal CANL of the CAN driver U1 is connected to the first end of the conjugate inductor L2. The high-level CAN voltage input / output terminal CANH of the CAN driver U1 is connected to the second end of the conjugate inductor L2. The slope resistor terminal Rs of the CAN driver U1 is connected to the first end of the resistor R2. The second end of the resistor R2 is connected to the power supply ground GND. The third end of the inductor L2 is connected to the first ends of the capacitor C2, the capacitor C5, the terminal resistor R3, the resistor R4, and the first end of the transient suppression diode group D1. The second end of the resistor R4 is connected to the interface 1 of the communication connector FG1. The second end of the transient suppression diode D1 is connected to the first end of the resistor R1, the second end of the resistor R3, and the fourth end of the conjugate inductor L2. The second end of the resistor R1 is connected to the interface 2 of the communication connector PWM1. The second end of the capacitor C2 is connected to the first end of the capacitor C6. The second end of the capacitor C6 is connected to the second end of the capacitor C5, the third end of the transient suppression diode D1, and the power supply ground GND.

[0083] The present invention also discloses an automobile four-way water pump control system, including a water pump and a pair of three-way proportional valves, namely a first three-way proportional valve and a second three-way proportional valve, and also including the automobile four-way water pump controller described in any one of claims 1 to 8;

[0084] The motor drive end of the water pump is connected to the motor drive end of the automotive four-way water pump controller. The control end of the first three-way proportional valve is connected to the first control end of the automotive four-way water pump controller. The control end of the second three-way proportional valve is connected to the second control end of the automotive four-way water pump controller;

[0085] The first inlet end of the first three-way proportional valve is connected to the first cold and heat source. The second inlet end of the first three-way proportional valve is connected to the second cold and heat source. The outlet end of the first three-way proportional valve is connected to the inlet end of the water pump. The outlet end of the water pump is connected to the inlet end of the second three-way proportional valve. The first outlet end of the second three-way proportional valve is connected to the first conveying pipeline. The second outlet end of the second three-way proportional valve is connected to the second conveying pipeline.

[0086] The present invention also discloses a working method of an automotive four-way water pump control system, including the following steps:

[0087] S-1, system initialization;

[0088] S-2, the controller U3 obtains the temperature value collected by the temperature module;

[0089] Among them, the calculation method for the temperature collected by the first temperature module is:

[0090]

[0091] Among them, u1 represents the voltage value input to the controller U3 by the first temperature module;

[0092] η1 represents the voltage error coefficient collected by the first temperature module, η1 ∈ (0, 1 / 13];

[0093] U VI_3V represents the voltage value of the power supply VI_3V;

[0094] R 15 represents the resistance value of the resistor R15;

[0095] R T1 represents the resistance value of the thermistor RT1;

[0096] →φ1 represents the temperature value corresponding to the thermistor value collected by the first temperature module;

[0097] represents derived to obtain.

[0098] The calculation method for the temperature collected by the second temperature module is:

[0099]

[0100] Among them, u2 represents the voltage value input to the controller U3 by the second temperature module;

[0101] η2 represents the voltage error coefficient collected by the second temperature module, and η2 ∈ (0, 1 / 13];

[0102] U VI_3V represents the voltage value of the power supply VI_3V;

[0103] R 17 represents the resistance value of the resistor R17;

[0104] R T1 represents the resistance value of the thermistor RT1;

[0105] →φ2 represents the temperature value corresponding to the thermistor value collected by the second temperature module;

[0106] The calculation method for the third temperature module to collect is:

[0107]

[0108] wherein, u3 represents the voltage value input to the controller U3 by the third temperature module;

[0109] η3 represents the voltage error coefficient collected by the third temperature module, and η3 ∈ (0, 1 / 13];

[0110] U VI_3V represents the voltage value of the power supply VI_3V;

[0111] R 20 represents the resistance value of the resistor R20;

[0112] R T3 represents the resistance value of the thermistor RT3;

[0113] →φ3 represents the temperature value corresponding to the thermistor value collected by the third temperature module;

[0114] The calculation method for the fourth temperature module to collect is:

[0115]

[0116] wherein, u4 represents the voltage value input to the controller U3 by the fourth temperature module;

[0117] η4 represents the voltage error coefficient collected by the fourth temperature module, and η4 ∈ (0, 1 / 13];

[0118] U VI_3V represents the voltage value of the power supply VI_3V;

[0119] R 23 represents the resistance value of the resistor R23;

[0120] R T4 represents the resistance value of the thermistor RT4;

[0121] → φ4 represents the temperature value corresponding to the thermistor value collected by the fourth temperature module;

[0122] The calculation method for the fifth temperature module to collect is as follows:

[0123]

[0124] Among them, u5 represents the voltage value input by the fifth temperature module to the controller U3;

[0125] η5 represents the voltage error coefficient collected by the fifth temperature module, η5 ∈ (0, 1 / 13];

[0126] U VI_3V represents the voltage value of the power supply VI_3V;

[0127] R 26 represents the resistance value of the resistor R26;

[0128] R T5 represents the resistance value of the thermistor RT5;

[0129] → φ5 represents the temperature value corresponding to the thermistor value collected by the fifth temperature module;

[0130] S-3. The controller U3 adjusts the temperature value of the output fluid according to the obtained temperature value; specifically, it includes the following steps:

[0131] S-31. Obtain the temperature of the liquid to be output;

[0132] S-32. Adjust the opening degrees of the first inlet end and the second inlet end of the first three-way proportional valve. The adjustment method of the opening degrees is as follows:

[0133]

[0134] Among them, φ1 represents the temperature value collected by the first temperature module;

[0135] Q 1,1 represents the flow value when the first inlet end of the first three-way proportional valve is fully open;

[0136] represents the proportional value of the opening degree of the first inlet end of the first three-way proportional valve;

[0137] Δt represents the unit time;

[0138] φ2 represents the temperature value collected by the second temperature module; φ2 < φ1;

[0139] Q 1,2 represents the flow value when the second inlet end of the first three-way proportional valve is fully open;

[0140] Represents the proportional value of the opening degree of the second inlet end of the first three-way proportional valve;

[0141] φ0 represents the temperature of the liquid to be output;

[0142] Q 1,0 Represents the flow value at the outlet end of the first three-way proportional valve;

[0143] S-33, judge the magnitude relationship between the temperature detected at the outlet end of the first three-way proportional valve and φ0:

[0144] If φ3 - φ0 ≤ φ, where φ represents the preset difference threshold, then maintain the opening degrees of the first inlet end of the first three-way proportional valve and the second inlet end of the first three-way proportional valve, the opening degree of the second inlet end of the second three-way proportional valve is 0, and the opening degree of the first inlet end of the second three-way proportional valve is Represents the opening degree proportional value of the first inlet of the second three-way proportional valve, Q 2,1 Represents the flow value when the first inlet end of the second three-way proportional valve is fully open, Q 1,1 Represents the flow value when the first inlet end of the first three-way proportional valve is fully open, Represents the opening degree proportional value of the first inlet end of the first three-way proportional valve, Q 1,2 Represents the flow value when the second inlet end of the first three-way proportional valve is fully open, Represents the opening degree proportional value of the second inlet end of the first three-way proportional valve;

[0145] If φ3 - φ0 > φ, then perform the next step;

[0146] S-34, adjust the opening degrees of the first inlet end of the second three-way proportional valve and the second inlet end of the second three-way proportional valve, and the adjustment method of the opening degrees is as follows:

[0147]

[0148] Among them, Q 2,0 Represents the flow value at the outlet end of the second three-way proportional valve;

[0149] Δt represents the unit time;

[0150] Q 1,1 Represents the flow value when the first inlet end of the first three-way proportional valve is fully open;

[0151] Represents the opening degree proportional value of the first inlet end of the first three-way proportional valve;

[0152] Q 1,2 Represents the flow value when the second inlet end of the first three-way proportional valve is fully open;

[0153] Represents the proportional value of the opening degree of the second inlet end of the first three-way proportional valve;

[0154] Q 2,2 Represents the flow value when the second inlet end of the second three-way proportional valve is fully open;

[0155] Represents the proportional value of the opening degree of the second inlet end of the second three-way proportional valve;

[0156] φ3 represents the temperature value collected by the third temperature module;

[0157] φ4 represents the temperature value collected by the fourth temperature module, and φ4 ≤ φ2;

[0158] S-35, determine the magnitude relationship between the temperature detected at the outlet end of the second three-way proportional valve and φ0:

[0159] If φ5 - φ0 ≤ φ, then maintain the opening degrees of the first inlet end of the first three-way proportional valve, the second inlet end of the first three-way proportional valve, the first inlet end of the second three-way proportional valve, and the second inlet end of the second three-way proportional valve;

[0160] If φ5 - φ0 > φ, then increase the opening degree of the second inlet end of the second three-way proportional valve, or increase the opening degree of the second inlet end of the first three-way proportional valve, or decrease and increase the opening degree of the first inlet end of the first three-way proportional valve, and return to step S-32.

[0161] The present invention also discloses a working method of an automotive four-way water pump, as Figures 3 to 7 shown, including the following steps:

[0162] S1, call the water pump control initialization subroutine;

[0163] S2, call the proportional valve initialization subroutine;

[0164] S3, water pump control signal conversion subroutine;

[0165] S4, the temperature signal sampling module collects temperature information;

[0166] S5, call the motor commutation monitoring subroutine to give corresponding UVW drive signals;

[0167] S6, speed regulation subroutine;

[0168] S7, determine whether phase detection is performed:

[0169] If phase detection is performed, then execute the open-phase detection subroutine and enter the fault handling program;

[0170] If phase detection is not performed, proceed to the next step;

[0171] S8, Determine whether overcurrent detection is performed:

[0172] If overcurrent detection is performed, execute the overcurrent detection subroutine and enter the fault handling program;

[0173] If overcurrent detection is not performed, proceed to the next step;

[0174] S9, Determine whether undervoltage detection is performed:

[0175] If undervoltage detection is performed, execute the undervoltage detection subroutine and enter the fault handling program;

[0176] If undervoltage detection is not performed, proceed to the next step;

[0177] S10, Determine whether overvoltage detection is performed:

[0178] If overvoltage detection is performed, execute the overvoltage detection subroutine and enter the fault handling program;

[0179] If overvoltage detection is not performed, proceed to the next step;

[0180] S11, Determine whether startup detection is performed:

[0181] If startup detection is performed, start the slow acceleration value, enter the rotational speed calculation subroutine; execute step S12;

[0182] If startup detection is not performed, return to step S3;

[0183] S12, Current sampling subroutine;

[0184] S13, Determine whether overcurrent detection is performed:

[0185] If overcurrent detection is performed, execute the overcurrent detection subroutine and enter the fault handling program;

[0186] If overcurrent detection is not performed, enter the speed regulation subroutine and then execute the proportional valve control program;

[0187] S14, After the fault handling program is executed, enter the proportional valve control program;

[0188] S15, After the proportional valve control program is executed, return to step S3.

[0189] In a preferred embodiment of the present invention, step S15 includes the following steps:

[0190] In a preferred embodiment of the present invention, the proportional valve control program includes the following steps:

[0191] S141. The position signal sampling module samples the valve opening position information;

[0192] S142. The temperature signal sampling module samples the temperature information;

[0193] S143. The valve control signal conversion subroutine;

[0194] S144. The valve target position calculation subroutine;

[0195] S145. Send the valve forward and reverse drive signals to the three-way proportional valve according to the valve target position;

[0196] S146. Determine whether to perform overcurrent detection:

[0197] If overcurrent detection is performed, execute the overcurrent detection subroutine and enter the fault handling program;

[0198] If overcurrent detection is not performed, execute the next step;

[0199] S147. Determine whether to perform undervoltage detection:

[0200] If undervoltage detection is performed, execute the undervoltage detection subroutine and enter the fault handling program;

[0201] If undervoltage detection is not performed, execute the next step;

[0202] S148. Determine whether to perform overvoltage detection:

[0203] If overvoltage detection is performed, execute the overvoltage detection subroutine and enter the fault handling program;

[0204] If overvoltage detection is not performed, execute the next step;

[0205] S149. Collect the valve position signal, and after collection, determine whether the target position is reached:

[0206] If the target position is reached, stop the valve drive and exit the proportional valve control program;

[0207] If the target position is not reached, execute the next step;

[0208] S150. Execute the current sampling subroutine and determine whether to perform overcurrent detection:

[0209] If overcurrent is detected, enter the fault handling program; after entering the fault handling program for processing, execute the next step;

[0210] If overcurrent is not detected, return to step S149 until the target position is reached, and then execute the next step;

[0211] S151. Exit the proportional valve control program.

[0212] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A working method of an automotive four-way water pump control system, characterized in that, The four-way water pump control system of the vehicle includes a water pump, a first three-way proportional valve, a second three-way proportional valve, and a vehicle four-way water pump controller; the vehicle four-way water pump controller includes a controller U3 and a temperature module; The control end of the first three-way proportional valve is connected to the first control end of the vehicle four-way water pump controller, and the control end of the second three-way proportional valve is connected to the second control end of the vehicle four-way water pump controller; The first inlet end of the first three-way proportional valve is connected to the first cold and heat source, the second inlet end of the first three-way proportional valve is connected to the second cold and heat source, the outlet end of the first three-way proportional valve is connected to the inlet end of the water pump, the outlet end of the water pump is connected to the first inlet end of the second three-way proportional valve, the second inlet end of the second three-way proportional valve is connected to the third cold and heat source, and the outlet end of the second three-way proportional valve is connected to the conveying pipeline; The working method of the four-way water pump control system of the vehicle includes the following steps: S-1, System initialization; S-2, The controller U3 obtains the temperature value collected by the temperature module; S-3, The controller U3 adjusts the temperature value of the output fluid according to the obtained temperature value; specifically includes the following steps: S-31, Obtain the temperature of the liquid to be output ; S-32, Adjust the opening degrees of the first inlet end and the second inlet end of the first three-way proportional valve; S-33, determine the temperature detected at the outlet end of the first three-way proportional valve and for the magnitude relationship: If , represents a preset difference threshold value, then keep the opening degrees of the first inlet end and the second inlet end of the first three-way proportional valve the same, the opening degree of the second inlet end of the second three-way proportional valve is 0, and the opening degree of the first inlet end of the second three-way proportional valve is , represents the opening degree ratio value of the first inlet of the second three-way proportional valve, represents the flow value when the first inlet end of the second three-way proportional valve is fully open, represents the flow value when the first inlet end of the first three-way proportional valve is fully open, represents the opening degree ratio value of the first inlet end of the first three-way proportional valve, represents the flow value when the second inlet end of the first three-way proportional valve is fully open, represents the opening degree ratio value of the second inlet end of the first three-way proportional valve; If , then perform the next step; S-34, Adjust the opening degrees of the first inlet end and the second inlet end of the second three-way proportional valve; S-35, determine the temperature detected at the outlet end of the second three-way proportional valve and for the size relationship: If , the opening degrees of the first inlet end of the first three-way proportional valve, the second inlet end of the first three-way proportional valve, the first inlet end of the second three-way proportional valve, and the second inlet end of the second three-way proportional valve are maintained; If , increase the opening degree of the second inlet end of the second three-way proportional valve, or increase the opening degree of the second inlet end of the first three-way proportional valve, or decrease the opening degree of the first inlet end of the first three-way proportional valve, and return to step S-32.

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