An electronic water pump controller device for automobile

Abstract

An electronic water pump controller device for automobiles relates to the technical field of automobile water pump control. The electronic water pump is composed of an electromagnetic clutch water pump and an electric water pump in parallel. When a high-power operating condition start signal is issued, the electromagnetic clutch water pump works. When a low-power operating condition start signal is issued, the controller device drives the electric water pump to work and the electromagnetic clutch water pump stops running. The controller device includes a controller cover, a controller circuit board, a shell, a signal socket, a power input port, and a three-phase output port of the motor. A heat dissipation boss is provided at the bottom of the shell. The controller circuit board is placed in the shell, and terminal blocks are installed at both ends of the shell. The present invention controls the electronic water pump through the received vehicle signal and can continue to work after the engine is turned off. It is not affected by the engine speed at the time and can work flexibly according to the actual cooling needs of the engine. The electromagnetic clutch water pump and the electric water pump are selected to work in parallel to reduce the power consumption of the engine and optimize the cooling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile water pump control, and in particular to an automobile electronic water pump controller device. Background Art

[0002] Traditional mechanical water pumps are driven by the engine crankshaft via a drive belt. Their speed is proportional to the engine speed, and at low engine speeds, heat dissipation capacity is also affected. Currently, most automotive electronic water pumps use brushless DC motors (BLDCs). Chinese Invention Patent Publication No. CN 102777367B discloses an automotive electronic water pump controller. This solution uses the back-electromotive force zero-crossing method to detect the water pump motor rotor position and thus achieve commutation control. However, the back-electromotive force zero-crossing method for commutation has some problems. Any error in the three-phase voltage detection of the motor armature can cause the motor to stall. Alternatively, there are solutions that use Hall sensors to detect the water pump motor rotor position and control commutation. However, Hall elements are also susceptible to interference and failure, ultimately causing the motor to stall. When a motor stall occurs, it can cause the cooling system to fail. If not detected and addressed in a timely manner, it can damage core vehicle components and even lead to serious safety accidents. Summary of the Invention

[0003] In response to the problem of cooling system failure when the motor stops in the above-mentioned prior art, the present invention proposes an automotive electronic water pump controller device in which the cooling system is not affected by the motor speed and an electromagnetic clutch water pump and an electric water pump are combined in parallel.

[0004] To solve the above problems, the technical solution of the present invention is as follows: an electronic water pump controller device for an automobile, the electronic water pump includes an electromagnetic clutch water pump, an electric water pump and a controller device, the electromagnetic clutch water pump and the electric water pump are combined in parallel, the electromagnetic clutch water pump is used for high-power working conditions, and the electric water pump is used for low-power working conditions, the controller device controls the operation of the electronic water pump by receiving the whole vehicle signal, when the whole vehicle sends a high-power working condition start signal, the controller device controls the electromagnetic clutch water pump to work, when the whole vehicle sends a low-power working condition start signal, the controller device drives the electric water pump to work, and the electromagnetic clutch water pump stops running.

[0005] The controller device includes a controller cover, a controller circuit board, and a shell. The controller circuit board includes a power management module, a central processing unit, a drive control module, a motor current sampling module, a temperature detection module, and a CAN communication module. The power supply is an on-board battery. A TVS tube, an LCπ-type filter, and a power chip are configured at the input end of the power management module near the connector. The central processing unit integrates the functions of an MCU and motor pre-drive control. The power input port is connected to the power management module. The voltage of the power management module is converted and connected to the central processing unit, the drive control module, the MOS tube H-bridge, and the CAN communication module respectively. The CAN communication module is connected to the central processing unit, the central processing unit is connected to the drive control module, the drive control module is connected to the MOS tube H-bridge, the MOS tube H-bridge is connected to the current sampling module, the current sampling module is connected to the drive control module and the BLDC brushless motor respectively, and the BLDC brushless motor outputs a back electromotive force that is transmitted to the drive control module.

[0006] Furthermore, after the controller device is powered on, it supplies power to the microcontroller inside the central processing unit, but the microcontroller is still in a low-power sleep mode. The microcontroller can only be awakened when the IG ignition signal is input into the drive control module. After the central processing unit detects the CAN communication signal, the microcontroller starts to control the motor to rotate counterclockwise, and the controller device adjusts the speed of the brushless motor according to the duty cycle signal.

[0007] Furthermore, the motor speed collected by the controller device and the wake-up status signal obtained through the CAN communication module are transmitted to the central processing unit. The central processing unit calculates the current size that needs to be output according to the internal algorithm, and combines the collected back electromotive force output by the motor to output the PWM wave through the FOC algorithm to control the motor drive module to output the target current; the current sampling module collects the motor current in real time and feeds it back to the central processing unit through the motor drive module. The central processing unit adjusts the output current in real time to enable the controller device to quickly and smoothly reach the actual target current size, and controls the operation of the electronic water pump through the current size of the controller device. The electromagnetic clutch water pump runs when the current is large, and the electric water pump runs when the current is lower than the threshold.

[0008] Furthermore, the controller device also includes a signal socket, a power input port, and a three-phase output port of the motor. A heat dissipation boss is provided at the bottom of the shell. The current sampling module is buried in the depression of the heat dissipation boss and filled with thermal grease. The controller circuit board is placed in the shell. Terminal blocks are installed at both ends of the shell. The signal socket and the power input port are installed on the right end face of the shell at positions corresponding to the terminal blocks. The three-phase output port of the motor is installed on the left end face of the shell at positions corresponding to the terminal blocks and is sealed by covering the controller cover with a sealing ring. When installed on the pump body, the three-phase output port of the controller device faces downward, and a gap filled with thermal grease is left between the heat dissipation boss and the controller circuit board.

[0009] Furthermore, the power input port and three-phase output port of the controller device all use copper terminals that can pass large currents. The signal socket, power input port, and three-phase output port all add waterproof gaskets and sealing ring locking structures. The signal socket also needs to be connected to a signal adapter terminal.

[0010] The present invention achieves the following beneficial effects: The controller device controls the electronic water pump using signals received from the vehicle. This device can continue to operate even after the engine is turned off, is unaffected by engine speed, and can flexibly adapt to the actual engine cooling needs. The electromagnetic clutch water pump and the electric water pump operate in parallel, reducing engine power consumption and optimizing cooling. The controller device also features a compact structure, reduced weight, and improved heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a water pump parallel diagram of an electronic water pump controller device for an automobile;

[0012] Figure 2 This is a diagram of the electronic water pump controller for automobiles;

[0013] Figure 3 This is a control system structure diagram of an electronic water pump controller for an automobile;

[0014] Figure 4 A cross-sectional view of an electric water pump of an electronic water pump controller device for an automobile;

[0015] Figure 5 This is an exploded view of an electronic water pump controller for an automobile;

[0016] Figure 6 This is an overall diagram of an electronic water pump controller device for an automobile;

[0017] In the picture:

[0018] 1——Pump cover 2——Pump body 3——Impeller 4——Special ring

[0019] 5——Motor 6——Controller device 7——Bracket 11——Controller cover

[0020] 12——Controller circuit board 13——Controller housing 14——Signal port

[0021] 15——Power input port 16——Three-phase outlet port 17——Heat dissipation boss

[0022] 18——Signal configuration terminal 19——Connection seat 20——Connection copper terminal

[0023] 21——Waterproof gasket 22——Sealing ring 23——Heat sink DETAILED DESCRIPTION

[0024] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the terms can be understood according to the specific circumstances.

[0026] Specifically, if Figure 1 As shown, a controller device for an electronic water pump for an automobile is shown. The electronic water pump includes an electromagnetic clutch water pump, an electric water pump and a controller device. The electromagnetic clutch water pump and the electric water pump are combined in parallel. The electromagnetic clutch water pump is used for high-power working conditions, and the electric water pump is used for low-power working conditions. The controller device controls the operation of the electronic water pump by receiving a signal from the whole vehicle. When the whole vehicle sends a high-power working condition start signal, the controller device controls the operation of the electromagnetic clutch water pump. When the whole vehicle sends a low-power working condition start signal, the controller device drives the electric water pump to work, and the electromagnetic clutch water pump stops running.

[0027] Specifically, if Figure 2 The controller device shown includes a controller cover 11, a controller circuit board 12, and a housing 13. Figure 3 The controller circuit board shown includes a power management module, a central processing unit, a drive control module, a motor current sampling module, a temperature detection module and a CAN communication module; the power supply is an on-board battery, and a TVS tube is configured at the input end of the power management module near the connector to protect the power supply, an LCπ-type filter is configured to achieve filtering, and voltage conversion is achieved through a power chip; the central processing unit integrates the functions of MCU and motor pre-drive control; the power supply is input into the power management module through the power input port, and the voltage of the power management module is converted and input into the central processing unit, the drive control module, the MOS tube H-bridge and the CAN communication module respectively. The CAN communication module is connected to the central processing unit, the central processing unit is connected to the drive control module, the drive control module is connected to the MOS tube H-bridge, the MOS tube H-bridge is connected to the current sampling module, the current sampling module is respectively connected to the drive control module and the BLDC brushless motor, and the BLDC brushless motor outputs the motor back electromotive force and transmits it to the drive control module.

[0028] Specifically, after the controller device is powered on, it supplies power to the microcontroller inside the central processing unit, but the microcontroller is still in low-power sleep mode. The microcontroller can only be awakened when the IG ignition signal is input into the drive control module. The central processing unit detects the CAN communication signal, and the drive module integrated inside the microcontroller starts to drive the motor to rotate counterclockwise. The controller device adjusts the speed of the brushless motor according to the duty cycle signal.

[0029] Specifically, the motor speed collected by the controller device and the wake-up status signal obtained through the CAN communication module are transmitted to the central processing unit. The central processing unit calculates the current that needs to be output according to the internal algorithm, and combines the collected back electromotive force of the motor output to output the PWM wave through the FOC algorithm to control the motor drive module to output the target current; the current sampling module collects the motor current in real time and feeds it back to the central processing unit through the motor drive module. The central processing unit adjusts the output current in real time to enable the controller device to quickly and smoothly reach the actual target current size, and controls the operation of the electronic water pump through the current size of the controller device. The electromagnetic clutch water pump runs when the current is large, and the electric water pump runs when the current is lower than the threshold.

[0030] Specifically, if Figure 4 As shown, the electric water pump assembly includes a pump cover 1, a pump body 2 and a bracket 7. The pump body includes an impeller 3, a special-shaped ring 4, and a motor 5. The pump cover 1 and the pump body 2 are fastened with bolts and cannot be disassembled. The housing 2 and the pump cover 1 of the electric water pump are aluminum parts; the motor 5 is a three-phase brushless motor.

[0031] Specifically, if Figure 5 The controller device shown also includes a signal socket 14, a power input port 15, and a motor three-phase outlet port 16. A heat dissipation boss 17 is provided at the bottom of the shell 13. The current sampling module is buried in the depression of the heat dissipation boss and filled with thermal grease. The controller circuit board 12 is placed in the shell 13. Terminal blocks 19 are installed at both ends of the shell 13. The signal socket 14 and the power input port 15 are installed on the right end face of the shell 13 at positions corresponding to the terminal blocks 19. The motor three-phase outlet port is installed on the left end face of the shell 13 at positions corresponding to the terminal blocks 19, and is sealed by covering the controller upper cover 11 and adding a sealing ring; when installed on the pump body 2, the three-phase outlet port 16 of the controller device faces downward, and a gap of 0.3-0.5mm is left between the heat dissipation boss 17 and the controller circuit board 12, and thermal grease is filled in the middle.

[0032] Specifically, the power input port 15 and the three-phase output port 16 of the controller device all use copper terminals 20 that can pass large currents. The signal socket 14, the power input port 15, and the three-phase output port 16 all add waterproof gaskets 21 and sealing rings 22 locking structures. The signal socket 14 also needs to be connected to a signal adapter terminal 18.

[0033] The controller device of the present invention controls the electronic water pump using signals received from the vehicle. This device can continue to operate even after the engine is turned off, regardless of the engine speed, and can flexibly adapt to the actual engine cooling needs. The electromagnetic clutch water pump and the electric water pump operate in parallel, reducing engine power consumption and optimizing cooling. The controller device is compact, lightweight, and provides improved heat dissipation.

[0034] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

[0035] In order to make it easier for those skilled in the art to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements have been omitted in this application document. Those skilled in the art should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. An electronic water pump controller device for an automobile, the electronic water pump comprising an electromagnetic clutch water pump, an electric water pump, and a controller device, characterized in that: The electromagnetic clutch water pump and the electric water pump are connected in parallel. The electromagnetic clutch water pump is used in high-power working conditions, and the electric water pump is used in low-power working conditions. The controller device controls the operation of the electronic water pump by receiving the vehicle signal. When the vehicle sends a high-power working condition start signal, the controller device controls the operation of the electromagnetic clutch water pump. When the vehicle sends a low-power working condition start signal, the controller device drives the electric water pump to work, and the electromagnetic clutch water pump stops running. The controller device includes a controller cover (11), a controller circuit board (12), and a housing (13). The controller circuit board includes a power supply tube. The power supply is a vehicle-mounted battery, and a TVS tube, an LCπ filter and a power chip are arranged at the input end of the power management module near the connector; the central processing unit integrates the functions of MCU and motor pre-drive control; the power input port is connected to the power management module, and the power management module is respectively connected to the central processing unit, the drive control module, the MOS tube H bridge and the CAN communication module, the CAN communication module is connected to the central processing unit, the central processing unit is connected to the drive control module, the drive control module is connected to the MOS tube H bridge, the MOS tube H bridge is connected to the current sampling module, the current sampling module is respectively connected to the drive control module and the BLDC brushless motor, and the BLDC brushless motor outputs a back electromotive force that is transmitted to the drive control module; the controller device also includes a signal socket (14), a power input port (15), and a motor three-phase outlet port (16); a heat dissipation boss (17) is provided at the bottom of the housing (13), the current sampling module is buried in the depression of the heat dissipation boss and filled with thermal grease, and the controller circuit board (12) is placed in the housing. In the body (13), the two ends of the shell (13) are equipped with terminal blocks (19), the signal socket (14) and the power input port (15) are installed on the right end surface of the shell (13) at positions corresponding to the terminal blocks (19), and the three-phase outlet port of the motor is installed on the left end surface of the shell (13) at positions corresponding to the terminal blocks (19), and is sealed by covering the controller cover (11) with a sealing ring; when installed on the pump body (2), the three-phase outlet port (16) of the controller device faces downward, and a gap filled with thermal grease is left between the heat dissipation boss (17) and the controller circuit board (12).

2. The automotive electronic water pump controller device according to claim 1, characterized in that: The power input port (15) and the three-phase outlet port (16) all use copper terminals (20) capable of passing large currents. The signal socket (14), the power input port (15), and the three-phase outlet port (16) all have waterproof gaskets (21) and sealing rings (22) as locking structures. The signal socket (14) also needs to be connected to a signal adapter terminal (18).

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