CN211777685U

CN211777685U - Engine piston cooling system and intelligent control electromagnetic valve assembly thereof

Info

Publication number: CN211777685U
Application number: CN202020272221.5U
Authority: CN
Inventors: 王立峰; 吴龙龙; 从田增; 王秀强; 王孟晓; 苏明涛; 王昊天; 吴鹏超; 衣金水; 吴贝贝
Original assignee: Weifang Lichuang Electronic Technology Co Ltd
Current assignee: Weifang Lichuang Electronic Technology Co Ltd
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-10-27
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses an engine piston cooling system and an intelligent control solenoid valve assembly thereof, wherein the intelligent control solenoid valve assembly comprises a solenoid valve body and a control device which are integrated into a whole; the control device comprises an injection molding mounting seat integrated with the shell of the electromagnetic valve body, a circuit board is packaged in the injection molding mounting seat, and a main control module, a power supply module, a CAN communication module electrically connected with the main control module and an electromagnetic valve driving module are arranged on the circuit board; the electromagnetic valve driving module is electrically connected with an electromagnetic coil of the electromagnetic valve body; and the injection molding mounting seat is provided with an external interface connected with the CAN communication/power supply module. The system comprises a piston and a cooling oil duct provided with a piston cooling nozzle and an intelligent control solenoid valve assembly. The utility model can realize corresponding action according to the opening command given by the ECU without occupying the drive circuit of the ECU, the load output pin or changing the configuration of the ECU; hardware requirements and development cost of the ECU are reduced.

Description

Engine piston cooling system and intelligent control electromagnetic valve assembly thereof

Technical Field

The utility model relates to a piston cooling technology field especially relates to an engine piston cooling system of intelligent control solenoid valve assembly and installation intelligent control solenoid valve assembly.

Background

The piston cooling valve adopted at present is directly driven by an engine ECU, no matter the piston cooling valve is made into an on-off valve or a proportional valve, the piston cooling valve is driven by a driving circuit in the ECU, and a loadable pin capable of outputting PWM waves is also used as an ECU driving pin. This results in that, in the process of matching the piston cooling valve with the ECU, once the ECU does not have enough driving circuits (now, many motors on the vehicle are driven by the driving circuits, and several driving backup circuits are generally reserved in the engine ECU, but not too many driving backup circuits are generally reserved), or when there is not enough PWM load output pins, the ECU and the piston cooling valve are difficult to match.

In view of this, it is needed to improve the prior art and develop an intelligent control solenoid valve assembly integrated with a control device; the opening, closing or keeping of the electromagnetic valve at a certain opening degree can be intelligently controlled according to the opening degree command given by the ECU without occupying a driving circuit of the ECU, a PWM load output pin or changing the configuration of the ECU; the difficulty and the research and development cost of the ECU for driving the intelligent control electromagnetic valve are reduced.

SUMMERY OF THE UTILITY MODEL

Aiming at overcoming the defects existing in the prior art, the utility model provides a first technical problem to be solved is to provide an intelligent control solenoid valve assembly with high integration degree, which can realize corresponding action according to the opening command given by the ECU without occupying the drive circuit of the ECU, PWM load output pins or changing the configuration of the ECU; the driving difficulty and the research and development cost of the ECU are reduced.

As same technical conception, the utility model provides a second technical problem be, provide an engine piston cooling system.

The technical scheme for solving the first technical problem is as follows: the intelligent control electromagnetic valve assembly comprises an electromagnetic valve body and a control device which are integrated into a whole;

the control device comprises an injection molding mounting seat integrated with the shell of the electromagnetic valve body, a circuit board is packaged in the injection molding mounting seat, and a main control module, a CAN communication module, an electromagnetic valve driving module and a power supply module are arranged on the circuit board; the CAN communication module and the electromagnetic valve driving module are electrically connected with the main control module, the power supply module is used for providing voltage for the main control module, the CAN communication module and the electromagnetic valve driving module, and the electromagnetic valve driving module is electrically connected with an electromagnetic coil of the electromagnetic valve body;

and the injection molding mounting seat is provided with an external interface connected with the CAN communication module and the power supply module.

Further, the main control module comprises a main control chip and a crystal oscillator circuit connected with the main control chip; the main control chip is internally provided with a storage unit.

Further, the power supply module comprises an input voltage circuit connected with the external interface, a buck DC/DC converter connected with the input voltage circuit and an output voltage circuit connected with the buck DC/DC converter;

the output voltage circuit is used for providing voltage for the main control module, the CAN communication module and the electromagnetic valve driving module.

Further, the input voltage circuit comprises a diode D1, the anode of the diode D1 is connected with the power supply positive terminal pin of the external interface, the cathode of the diode D1 is electrically connected with a capacitor C2, the cathode of the diode D2 and an inductor L1, and the other end of the capacitor C2 and the anode of the diode D2 are both grounded; the other end of the inductor L1 is electrically connected with a capacitor C4, a capacitor C5, the power supply positive electrode pin and a Vin pin of the buck DC/DC converter, and the other ends of the capacitor C4 and the capacitor C5 are grounded;

the buck-type DC/DC converter further comprises a resistor R1 connected with a Vin pin of the buck-type DC/DC converter, a capacitor C8 connected with a Vss pin of the buck-type DC/DC converter and a capacitor C9 connected with an SS pin of the buck-type DC/DC converter; the other end of the resistor R1 is electrically connected with an EN/UVLO pin of the buck DC/DC converter and a resistor R2, and the other ends of the resistor R2, the capacitor C8 and the capacitor C9 are all grounded;

the output voltage circuit comprises an inductor L2 connected with an LX pin of the buck DC/DC converter and a capacitor C1, a capacitor C3, a capacitor C3 and a capacitor C7 which are connected in parallel; a common node at one end of the capacitor C1, the capacitor C3, the capacitor C3 and the capacitor C7 is connected with the other end of the inductor L2, and an output voltage end is led out; the common node at the other end is grounded.

Further, the CAN communication module comprises a CAN transceiver and an electrostatic protection circuit;

a receiving/sending pin of the CAN transceiver is correspondingly and electrically connected with a receiving/sending pin of the main control chip; the electrostatic protection circuit comprises an ESD electrostatic protection diode Uf1 and a resistor R3 which are connected in parallel, a common node at one end of the ESD electrostatic protection diode Uf1 and the resistor R3 is electrically connected with a CANH communication pin of the CAN transceiver and a CANH communication pin of the external interface, and a common node at the other end is electrically connected with a CANL communication pin of the CAN transceiver and a CANL communication pin of the external interface; and a VI0 pin and a VCC pin of the CAN transceiver are electrically connected with the output end of the power supply module.

Further, the electromagnetic valve driving module comprises a driving circuit;

the driving circuit comprises a power management chip, an ST pin of the power management chip is electrically connected with a fault feedback pin of the main control chip, an IN pin of the power management chip is electrically connected with a control pin of the main control chip, and an output pin OUT of the power management chip is connected with a positive terminal of the electromagnetic coil; and the negative end of the electromagnetic coil is grounded.

Further, a resistor R6 is connected in series between the ST pin of the power management chip and the fault feedback pin of the main control chip, a connection node of the resistor R6 and the ST pin is connected with a resistor R5, and the other end of the resistor R5 is connected with the output end of the power supply module; the connecting node of the resistor R6 and the fault feedback pin of the main control chip is connected with a capacitor C16, and the other end of the capacitor C16 is grounded;

a resistor R9 is connected IN series between an IN pin of the power management chip and a control pin of the main control chip, a connecting node of the resistor R9 and the control pin of the main control chip is connected with a resistor R8, and the other end of the resistor R8 is grounded; and a VBB pin of the power management chip is electrically connected with the input end of the power supply module.

Further, the electromagnetic valve driving module further comprises a current fault feedback circuit;

the current fault feedback circuit comprises a capacitor C17, a resistor R11, a resistor R10 and a capacitor C18; the capacitor C17 and the resistor R11 are connected in parallel, a common node at one end of the parallel connected capacitor C17 and the parallel connected resistor R11 is electrically connected with the negative end of the electromagnetic coil and the resistor R10, the other end of the resistor R10 is electrically connected with the capacitor C18 and the first input pin of the main control chip, and the other end of the capacitor C18 is grounded.

Further, the electromagnetic valve driving module further comprises a voltage fault feedback circuit;

the voltage fault feedback circuit comprises a resistor R13, a resistor R12, a voltage stabilizing diode Ddf, a capacitor C19, a resistor R14 and a capacitor C20; one end of the resistor R13 is electrically connected with the input end of the power supply module, the other end of the resistor R13 is electrically connected with one end of the resistor R12, the other end of the resistor R12 is grounded, the zener diode Ddf and the capacitor C19 are both connected in parallel with the resistor R12, and the resistor R14 is connected in series with the capacitor C20 and then connected in parallel with the resistor R12;

the connecting node of the resistor R14 and the capacitor C20 is electrically connected with the second input pin of the main control chip.

The technical scheme adopted for solving the second technical problem is as follows: the cooling system comprises a plurality of pistons and cooling oil channels, wherein piston cooling nozzles which correspond to the pistons one by one are arranged at the downstream sections of the cooling oil channels; the intelligent control electromagnetic valve assembly is arranged at the upstream section of the cooling oil duct;

the external interface is connected with two CAN signal lines on the CAN bus and two power lines on the whole vehicle wiring harness.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

the intelligent control solenoid valve assembly comprises a solenoid valve body and a control device which are integrated into a whole; the control device comprises an injection molding mounting seat integrated with the shell of the electromagnetic valve body, a circuit board is packaged in the injection molding mounting seat, and a main control module, a CAN communication module, an electromagnetic valve driving module and a power supply module are arranged on the circuit board; and the injection molding mounting seat is provided with an external interface connected with the CAN communication module and the power supply module. Two CAN signal lines on an external CAN bus of an external interface and two power lines on a whole vehicle wiring harness CAN realize communication with the ECU; an opening command given by the ECU is uploaded to the main control module through the external interface and the CAN communication module, and the electromagnetic valve driving module electrically connected with the main control module CAN control the opening and closing of the valve or keep the valve at a certain opening; or the ECU only needs to send a start signal to the main control module, the main control module CAN automatically acquire the operating conditions of the engine from the CAN bus, such as the information of the engine speed, the engine supercharging pressure, the engine water temperature, the engine oil pressure, the engine oil temperature and the like, after the main control module acquires the information of the operating conditions of the engine, the intelligent operation CAN be carried out, the opening degree of the electromagnetic valve body to be opened at the moment is calculated, and the electromagnetic valve body is automatically opened to the opening degree, so that the purpose of intelligently controlling the cooling oil quantity of the piston is achieved; a driving circuit and a PWM load output pin of the ECU are not occupied; the ECU does not need to configure a circuit or a bottom layer code or a strategy code, so that the problem of limited matching with the ECU is solved.

In summary, the intelligent control solenoid valve assembly of the utility model has high integration degree, and can realize corresponding actions according to the opening command given by the ECU without occupying the drive circuit of the ECU, the PWM load output pin or changing the configuration of the ECU; the driving difficulty and the research and development cost of the ECU are reduced.

Drawings

Fig. 1 is a schematic structural diagram of the intelligent control solenoid valve assembly of the present invention;

FIG. 2 is a schematic block diagram of the intelligent control solenoid valve assembly of the present invention;

FIG. 3 is an electronic circuit diagram of the control device;

FIG. 4 is an enlarged view of the electronic circuit of the solenoid driver module of FIG. 3;

FIG. 5 is an enlarged view of the electronic circuitry of the master control module;

FIG. 6 is an enlarged view of the electronic circuitry of the power module and the CAN communication module;

FIG. 7 is a block diagram of the engine piston cooling system of the present invention;

in the figure: 1-intelligent control electromagnetic valve assembly, 11-electromagnetic valve body, 111-shell, 112-electromagnetic coil, 113-magnetic isolation sleeve, 114-movable armature, 115-thimble, 116-static armature, 117-valve seat, 1171-oil inlet, 1172-oil outlet, 118-valve core, 12-control device, 121-injection molding mounting seat, 122-circuit board, 123-external interface, 2-piston, 3-cooling oil channel, 4-piston cooling nozzle, 5-CAN signal line, 6-power line;

the control circuit comprises an a-electromagnetic valve driving module, an a 1-driving circuit, an a 2-current fault feedback circuit, an a 3-voltage fault feedback circuit, a b-CAN communication module, a b 1-electrostatic protection circuit, a c-power supply module, a c 1-input voltage circuit, a c 2-output voltage circuit, a d-main control module and a d 1-crystal oscillator circuit.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. The description of the present embodiment is merely for convenience of simplifying the description and is not to be construed as limiting the utility model.

The first embodiment is as follows:

as shown in fig. 1 and fig. 2 together, the intelligent control solenoid valve assembly 1 includes a solenoid valve body 11 and a control device 12 which are integrated into a whole; the integrated design, compact structure. The electromagnetic valve body 11 comprises a shell 111, an electromagnetic coil 112 is arranged in the shell 111, a magnetic spacer 113 is arranged in the inner ring of the electromagnetic coil 112, and a movable armature 114 is arranged in the magnetic spacer 113; a valve seat 117 is arranged in the housing 111, a static armature 116 is integrated on the valve seat 117, one end of the valve seat 117 abuts against the electromagnetic coil 112, a valve core 118 and an ejector pin 115 are slidably mounted in the valve seat 117, one end of the ejector pin 115 abuts against the valve core 118, the other end of the ejector pin 115 abuts against the movable armature 114, an oil inlet 1171 is arranged at one end of the valve seat 117, and an oil outlet 1172 is arranged at the periphery of the valve seat 117.

The control device 12 comprises an injection molding mounting seat 121 integrated with the shell 111 of the solenoid valve body 11, a circuit board 122 is packaged in the injection molding mounting seat 121, and a main control module d, a CAN communication module b, a solenoid valve driving module a and a power supply module c are arranged on the circuit board 122; the CAN communication module b and the solenoid valve driving module a are electrically connected with the main control module d, the power supply module c is used for providing voltage for the main control module d, the CAN communication module b and the solenoid valve driving module a, and the solenoid valve driving module a is electrically connected with the solenoid coil 112 of the solenoid valve body aa; the injection molding mounting seat 121 is provided with an external interface 123 connected with the CAN communication module b and the power supply module c.

Two CAN signal lines 5 (shown in figure 7) on the external CAN bus of the external interface 123 and two power lines 6 (shown in figure 7) on the whole vehicle wiring harness CAN realize the communication with the ECU; an opening command given by the ECU is uploaded to a main control module d through an external interface 123 and a CAN communication module b, the main control module d outputs a PWM voltage signal to an electromagnetic valve driving module a, and the electromagnetic valve driving module a outputs a PWM power signal for controlling the electromagnetic valve body 11 to open, close or keep a certain opening; an H-bridge circuit and a PWM load output pin of the ECU are not occupied; the ECU does not need to be configured with a circuit or bottom layer codes, and the problem of limited matching with the ECU is solved.

The electromagnetic valve body 11 in the embodiment is in a switch valve form, and the ECU can control the on-off of the electromagnetic valve body 11 only by sending a 0-1 switch command; if the solenoid valve body 11 is in the form of a proportional valve, the ECU may send an opening value within 1 to 1000 to control the opening of the solenoid valve body 11. The principle of this is briefly described below by way of example in the form of a proportional valve.

The electromagnetic valve body 11 in the embodiment is in a normally open proportional valve form, oil is fed from the lower end, oil is discharged from the side hole, when the electromagnetic coil 112 is not powered on, the valve is opened, and engine oil can flow normally; after power-up, based on a PWM power signal output by the electromagnetic valve driving module a to the electromagnetic coil 112, the movable armature 114 pushes the thimble 115 to move downwards, the thimble 115 pushes the valve core 118 to move downwards, and the oil outlet 1172 on the valve seat 117 is gradually sealed in the descending process of the valve core 118, so that proportion adjustment is realized.

As shown in fig. 3 to fig. 6, in this embodiment, the main control module d includes a main control chip of a model STM32 and a crystal oscillator circuit d1 connected to the main control chip; the main control chip is internally provided with a storage unit, based on parameters such as real-time rotating speed, supercharging pressure, engine oil temperature and water temperature of the engine, and according to the parameters, MAP execution and MAP correction are calibrated through a bench test, and the MAP is stored in the storage unit for calling, so that the code amount of the ECU is reduced, and the operation speed of the ECU is ensured; the crystal oscillator circuit d1 is a common clock circuit, and is not described herein.

In this embodiment, the power supply module c includes an input voltage circuit c1 (input 24V voltage) connected to the power supply positive pin (VIN shown in the figure) of the external interface 123, a step-down DC/DC converter connected to the input voltage circuit c1, and an output voltage circuit c2 connected to the step-down DC/DC converter; the buck DC/DC converter in this embodiment may be a DC/DC converter with a model MAX17501 BTEVKIT. The output voltage circuit c2 is used for providing 5V voltage for the main control module d, the CAN communication module b and the solenoid valve driving module a.

The input voltage circuit C1 (a filter circuit) includes a diode D1, an anode of the diode D1 is connected to a power supply positive terminal pin of the external interface 123, a cathode of the diode D1 is electrically connected to a capacitor C2, a cathode of the diode D2 and an inductor L1, and the other end of the capacitor C2 and an anode of the diode D2 are grounded; the other end of the inductor L1 is electrically connected with the capacitor C4, the capacitor C5, the power supply positive electrode pin and the Vin pin of the buck DC/DC converter, and the other ends of the capacitor C4 and the capacitor C5 are grounded; the buck-type DC/DC converter further comprises a resistor R1 connected with a Vin pin of the buck-type DC/DC converter, a capacitor C8 connected with a Vss pin of the buck-type DC/DC converter and a capacitor C9 connected with an SS pin of the buck-type DC/DC converter; the other end of the resistor R1 is electrically connected with an EN/UVLO pin of the buck DC/DC converter and the resistor R2, and the other ends of the resistor R2, the capacitor C8 and the capacitor C9 are all grounded.

The output voltage circuit C2 (which is a filter circuit) includes an inductor L2 connected to the LX pin of the buck DC/DC converter, and a capacitor C1, a capacitor C3, a capacitor C3, and a capacitor C7 connected in parallel; a common node at one ends of the capacitor C1, the capacitor C3, the capacitor C3 and the capacitor C7 is connected with the other end of the inductor L2, and an output voltage end (+5V) is led out; the common node at the other end is grounded.

In this embodiment, the CAN communication module b includes a CAN transceiver of the model TJA1042TK/3 and an electrostatic protection circuit b 1; a receiving/transmitting pin (RXD/TXD) of the CAN transceiver is correspondingly and electrically connected with a receiving/transmitting pin of the main control chip; the electrostatic protection circuit b1 comprises an ESD electrostatic protection diode Uf1 and a resistor R3 which are connected in parallel, a common node at one end of the ESD electrostatic protection diode Uf1 and the resistor R3 is electrically connected with a CANH communication pin of the CAN transceiver and a CANH communication pin (CANH shown in the figure) of the external interface 123, and a common node at the other end is electrically connected with a CANL communication pin of the CAN transceiver and a CANL communication pin (CANL shown in the figure) of the external interface 123; the VI0 pin and the VCC pin of the CAN transceiver are both electrically connected to the output terminal of the power supply module c (the output voltage terminal of the output voltage circuit c 2).

In this embodiment, the solenoid driver module a includes a driver circuit a1, a current fault feedback current a2, and a voltage fault feedback circuit a 3.

The driving circuit a1 comprises a power management chip with model number BTS428L2, wherein the ST pin of the power management chip is electrically connected with the fault feedback pin of the main control chip, the IN pin of the power management chip is electrically connected with the control pin of the main control chip, and the output pin OUT (output PWM power signal) of the power management chip is connected with the positive terminal of the electromagnetic coil 112; the negative terminal of the electromagnetic coil 112 is grounded.

A resistor R6 is connected in series between an ST pin of the power management chip and a fault feedback pin of the main control chip, a connecting node of a resistor R6 and the ST pin is connected with a resistor R5, and the other end of the resistor R5 is connected with an output end (an output voltage end of an output voltage circuit c 2) of the power supply module c; the connecting node of the resistor R6 and the fault feedback pin of the main control chip is connected with the capacitor C16, and the other end of the capacitor C16 is grounded; a resistor R9 is connected IN series between an IN pin of the power management chip and a control pin of the main control chip, a connecting node of the resistor R9 and the control pin of the main control chip is connected with the resistor R8, and the other end of the resistor R8 is grounded; the VBB pin of the power management chip is electrically connected to the input terminal of the power supply module c (the anode of the diode D1 connected to the power supply positive pin of the external interface 123).

The current failure feedback circuit a2 is drawn from the negative electrode terminal of the electromagnetic coil 123, and detects the current flowing through the electromagnetic coil 123 to determine whether or not a failure is present. The circuit comprises a capacitor C17, a resistor R11, a resistor R10 and a capacitor C18; the capacitor C17 and the resistor R11 are connected in parallel, and a common node at one end of the parallel connection is electrically connected with both the negative terminal of the electromagnetic coil 123 and the resistor R10, the other end of the resistor R10 is electrically connected with both the capacitor C18 and a first input pin (shown as pin 26 in the figure and identified as AIN0) of the main control chip, and the other end of the capacitor C18 is grounded.

The voltage failure feedback circuit a3 is led out from the input of the power supply module c and performs voltage detection for voltage correction. The circuit comprises a resistor R13, a resistor R12, a voltage stabilizing diode Ddf, a capacitor C19, a resistor R14 and a capacitor C20; one end of the resistor R13 is electrically connected with an input end of the power supply module C (an anode of the diode D1 connected with a power supply positive pin of the external interface 123), the other end of the resistor R13 is electrically connected with one end of the resistor R12, the other end of the resistor R12 is grounded, the voltage stabilizing diode Ddf and the capacitor C19 are both connected with the resistor R12 in parallel, and the resistor R14 is connected with the resistor R12 after being connected with the capacitor C20 in series; the connection node of the resistor R14 and the capacitor C20 is electrically connected to a second input pin (shown as pin 27, identified as AIN1) of the main control chip.

The current fault feedback current a2, the voltage fault feedback circuit a3 and the self-contained ST pin of the power management chip can acquire parameters such as driving current, driving voltage and the like in real time, and judge the current working condition of the electromagnetic valve body 11 and whether faults such as open circuit, short circuit, clamping stagnation and the like occur; the feedback signal can be provided for the ECU, and the ECU control strategy can be conveniently made into a closed loop.

Wherein: fig. 3 to fig. 6 have many same reference symbols, where the same reference symbols are marked to represent that the same reference symbols are electrically connected to each other, for example, fig. 4 and fig. 5 both have MOS _ CTRL marks, which represent that the same reference symbols are electrically connected to each other, and further description of other same reference symbols is omitted.

Example two:

the embodiment is a specific application of the first embodiment, and discloses an engine piston cooling system, which comprises a plurality of pistons 2 and cooling oil channels 3, wherein piston cooling nozzles 4 which are in one-to-one correspondence with the pistons 2 are installed at the downstream sections of the cooling oil channels 3; the cooling oil duct system further comprises an intelligent control electromagnetic valve assembly 1, wherein the intelligent control electromagnetic valve assembly 1 is arranged at the upstream section of the cooling oil duct 3; the external interface 123 is externally connected with two CAN signal lines 5 (following a CAN bus protocol and performing data interaction with an ECU) on a CAN bus and two power lines 6 on a whole vehicle wiring harness.

In the running process of the engine, the main control chip sends a PWM signal to the electromagnetic valve driving module a according to a control command sent by the ECU through the CAN bus, the electromagnetic valve driving module a drives the electromagnetic valve body 11 to do corresponding actions, and real-time control correction is carried out according to MAP stored in the main control chip.

In conclusion, the intelligent control electromagnetic valve assembly of the utility model has high integration degree and compact structure; the wiring is simple, only 4 lines of power supply and a CAN bus are needed, and corresponding actions CAN be realized according to the opening command given by the ECU without occupying an H-bridge circuit of the ECU, a PWM load output pin or changing the configuration of the ECU; the driving difficulty and the research and development cost of the ECU are reduced.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications are within the scope of the appended claims.

Claims

1. An intelligent control electromagnetic valve assembly is characterized by comprising an electromagnetic valve body and a control device which are integrated into a whole;

2. The intelligent control solenoid valve assembly of claim 1, wherein the master control module comprises a master control chip and a crystal oscillator circuit connected to the master control chip; the main control chip is internally provided with a storage unit.

3. The intelligent control solenoid valve assembly of claim 2, wherein the power supply module comprises an input voltage circuit connected to the external interface, a buck DC/DC converter connected to the input voltage circuit, and an output voltage circuit connected to the buck DC/DC converter;

4. The assembly as claimed in claim 3, wherein the input voltage circuit comprises a diode D1, the anode of the diode D1 is connected to the positive power pin of the external interface, the cathode of the diode D1 is electrically connected to the capacitor C2, the cathode of the diode D2 and the inductor L1, and the other end of the capacitor C2 and the anode of the diode D2 are grounded; the other end of the inductor L1 is electrically connected with a capacitor C4, a capacitor C5, the power supply positive electrode pin and a Vin pin of the buck DC/DC converter, and the other ends of the capacitor C4 and the capacitor C5 are grounded;

5. The intelligent control solenoid valve assembly of claim 2, wherein said CAN communication module comprises a CAN transceiver and an electrostatic protection circuit;

6. The intelligent control solenoid valve assembly of claim 2, wherein said solenoid valve drive module comprises a drive circuit;

7. The assembly of claim 6, wherein a resistor R6 is connected in series between the ST pin of the power management chip and the fault feedback pin of the main control chip, a connection node of the resistor R6 and the ST pin is connected with a resistor R5, and the other end of the resistor R5 is connected with the output end of the power supply module; the connecting node of the resistor R6 and the fault feedback pin of the main control chip is connected with a capacitor C16, and the other end of the capacitor C16 is grounded;

8. The intelligent control solenoid valve assembly of claim 6, wherein said solenoid valve drive module further comprises a current fault feedback circuit;

9. The intelligent control solenoid valve assembly of claim 6, wherein said solenoid valve drive module further comprises a voltage fault feedback circuit;

10. An engine piston cooling system comprises a plurality of pistons and cooling oil ducts, wherein piston cooling nozzles which correspond to the pistons one by one are mounted at the downstream sections of the cooling oil ducts; the intelligent control electromagnetic valve assembly is characterized by further comprising the intelligent control electromagnetic valve assembly as claimed in any one of claims 1 to 9, wherein the intelligent control electromagnetic valve assembly is installed at the upstream section of the cooling oil channel;