CN217080639U

CN217080639U - Novel electronic fuel pump controller

Info

Publication number: CN217080639U
Application number: CN202220763040.1U
Authority: CN
Inventors: 熊鸿斌; 靖伟; 吴成明; 孙华; 张宇航; 许浩; 刘备; 王瑞
Original assignee: Hubei Saiensi Science & Technology Co ltd
Current assignee: Hubei Saiensi Science & Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-07-29
Anticipated expiration: 2032-04-02

Abstract

The utility model relates to a novel electronic fuel pump controller, change 12V module and 12V change 5V module including controller, driver chip, MOS pipe drive circuit, current detection circuit, drive power supply control circuit, DC power module, DC power. The utility model provides a pair of novel electronic fuel pump controller passes through current detection circuit and realizes carrying out the accurate collection to data such as user state, number of times of fuel pump, through drive power supply control circuit control MOS pipe drive circuit's power supply state, when MOS pipe drive circuit is out of work, and disconnection MOS pipe drive circuit's power avoids the components and parts among the MOS pipe drive circuit to be in the circular telegram state always, realizes protecting components and parts to reduce the energy consumption.

Description

Novel electronic fuel pump controller

Technical Field

The utility model relates to a controller technical field especially relates to a novel electronic fuel pump controller.

Background

The existing fuel pump controller directly supplies power to drive the motor through 12V, and provides certain oil pressure under the condition that the engine works, so that the engine can obtain enough fuel to continuously operate. The existing fuel pump controller is not comprehensive in function, cannot accurately acquire data such as the use state and the times of a fuel pump, is large in power consumption when used, and can cause excessive loss of a storage battery after being used for a long time. Therefore, it is necessary to provide a novel electronic fuel pump controller with multiple functions and low power consumption to accurately collect data such as the usage state and the number of times of the fuel pump.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a novel electron fuel pump controller of multi-functional, low-power consumption comes to carry out accurate collection to data such as user state, the number of times of fuel pump.

The utility model provides a novel electronic fuel pump controller, which comprises a controller (4), a driving chip (6), an MOS tube driving circuit (7), a current detection circuit (8), a driving power supply control circuit (5), a DC power supply module (1), a DC power supply to 12V module (2) and a 12V to 5V module (3);

the controller (4) is electrically connected with the driving chip (6), the output port of the driving chip (6) is electrically connected with the input port of the MOS tube driving circuit (7), and the output port of the MOS tube driving circuit (7) is electrically connected with the BLDC fuel pump (12);

the electric energy output end of the DC power supply module (1) is electrically connected with the input end of the DC power supply to 12V module (2) and the power supply end of the driving power supply control circuit (5) respectively, the output end of the DC power supply to 12V module (2) is electrically connected with the power supply end of the driving chip (6) and the input end of the 12V to 5V module (3) respectively, and the output end of the 12V to 5V module (3) is electrically connected with the power supply ends of the controller (4) and the current detection circuit (8) respectively;

the control end of the driving power supply control circuit (5) is electrically connected with the I/O port of the controller (4), and the output end of the driving power supply control circuit (5) is electrically connected with the power supply end of the MOS tube driving circuit (7);

the input end of the current detection circuit (8) is electrically connected with the MOS tube driving circuit (7), and the output end of the current detection circuit (8) is electrically connected with the controller (4).

On the basis of the above scheme, preferably, the MOS transistor driving circuit (7) includes resistors R1, R12 and R13, MOS transistors Q1, Q2, Q3, and capacitors C1, C2 and C3; one end of a resistor R1 is electrically connected with a thirteenth pin of the driving chip (6), the other end of the resistor R1 is electrically connected with a gate of a MOS transistor Q1 and one end of a resistor R2 respectively, the other end of the resistor R2 is electrically connected with a source of a MOS transistor Q1, a drain of the MOS transistor Q2 and a U-phase coil of a BLDC fuel pump (12), a drain of a MOS transistor Q1 and one end of a capacitor C1 are connected with a power supply voltage, the other end of the capacitor C1 is grounded, one end of a resistor R3 is electrically connected with a ninth pin of the driving chip (6), the other end of a resistor R3 is electrically connected with a gate of a MOS transistor Q2 and one end of a resistor R4 respectively, one end of a resistor R5 is electrically connected with a sixteenth pin of the driving chip (6), the other end of the resistor R5 is electrically connected with a gate of a MOS transistor Q3 and one end of a resistor R6, the other end of a resistor R6 is electrically connected with a source of a MOS transistor Q3, a drain of a MOS transistor Q4 and a BLV coil of a BLDC fuel pump (12) respectively, the drain of a MOS tube Q3 and one end of a capacitor C2 are connected with a power supply voltage, the other end of a capacitor C2 is grounded, one end of a resistor R7 is electrically connected with a tenth pin of a driving chip (6), the other end of a resistor R7 is electrically connected with the gate of a MOS tube Q4 and one end of a resistor R8, one end of a resistor R9 is electrically connected with a nineteenth pin of the driving chip (6), the other end of the resistor R9 is electrically connected with the gate of the MOS tube Q5 and one end of a resistor R10, the other end of a resistor R10 is electrically connected with the source of a MOS tube Q5, the drain of the MOS tube Q6 and a W-phase coil of the BLDC fuel pump (12), the drain of the MOS tube Q5 and one end of the capacitor C3 are connected with the power supply voltage, the other end of the capacitor C3 is electrically connected with one end of a resistor R11 and the eleventh pin of the driving chip (6), and the other end of the resistor R11 is electrically connected with the gate of the MOS tube Q6 and one end of the resistor R12, the other end of the resistor R4, the source of the MOS transistor Q2, the other end of the resistor R8, the source of the MOS transistor Q4, the other end of the resistor R12, the source of the MOS transistor Q6 and the input end of the current detection circuit (8) are all electrically connected with one end of the resistor R13, and the other end of the resistor R13 is grounded.

On the basis of the above solution, preferably, the current detection circuit (8) includes resistors R31, R32, R33, R35, and a capacitor C36; one end of a capacitor C36 and one end of a resistor R33 are both electrically connected with one end of a resistor R13, the other end of the capacitor C36 is grounded with one end of a resistor R31, the other end of a resistor R31 is respectively electrically connected with one end of the resistor R32 and a twentieth pin of the controller (4), the other end of the resistor R32 is electrically connected with a nineteenth pin of the controller (4), the other end of the resistor R33 is respectively electrically connected with a twenty-first pin of the controller (4), one end of a resistor R34 and one end of a resistor R35, the other end of a resistor R34 is connected with +5V voltage, and the other end of the resistor R35 is grounded.

On the basis of the above scheme, preferably, the driving power supply control circuit (5) includes resistors R11, R12, R13 and R14, capacitors C11, C12, C13, C15, a MOS transistor Q7, a diode D1 and a transistor Q8; the power output end of the DC power supply module (1) is electrically connected with one end of a capacitor C11, one end of a capacitor C11 is respectively and electrically connected with one end of a capacitor C12, one end of a capacitor C13 and one end of a capacitor C14, the other end of a capacitor C11, the other end of a capacitor C12, the other end of a capacitor C13 and the other end of a capacitor C14 are grounded, one end of a capacitor C14 is respectively and electrically connected with one end of a resistor R14 and the source of a MOS transistor Q7, the other end of a resistor R14 is respectively and electrically connected with one end of a resistor R13 and the gate of a MOS transistor Q7, the other end of a resistor R13 is electrically connected with the collector of a triode Q8, the base of a triode Q8 is respectively and electrically connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is electrically connected with an I/O port 497 of a controller (4), the other end of the resistor R5478 and the emitter of the triode Q8 are both grounded, the drain of a MOS transistor Q6855 is electrically connected with the anode 1, the cathode of the diode D1 and one end of the capacitor C15 are connected with the power supply end of the MOS tube driving circuit (7), and the other end of the resistor C15 is grounded.

On the basis of the scheme, the overvoltage protection device preferably further comprises an undervoltage overvoltage protection module (9); the input end of the undervoltage overvoltage protection module (9) is electrically connected with the electric energy output end of the DC power supply module (1), and the output end of the undervoltage overvoltage protection module (9) is electrically connected with the universal input end of the controller (4).

On the basis of the above scheme, preferably, the undervoltage and overvoltage protection module (9) includes resistors R21, R22, R23 and a capacitor C24; one end of the resistor R21 is electrically connected with the power output end of the DC power supply module (1), the other end of the resistor R21 is electrically connected with one end of the resistor R23 and one end of the resistor R22 respectively, the other end of the resistor R22 and one end of the capacitor C24 are both electrically connected with the universal input end of the controller (4), and one end of the resistor R23 and the other end of the capacitor C24 are grounded.

On the basis of the scheme, the system preferably further comprises a debugging interface (10); the debugging interface (10) is electrically connected with the controller (4).

In addition to the above, preferably, the driving chip (6) is an FD6288 chip.

Compared with the prior art, the utility model provides a pair of novel electronic fuel pump controller possesses following beneficial effect:

(1) the utility model provides a pair of novel electronic fuel pump controller passes through current detection circuit and realizes carrying out accurate collection to data such as user state, number of times of fuel pump, through drive power supply control circuit control MOS pipe drive circuit's power supply state, when MOS pipe drive circuit is out of work, and disconnection MOS pipe drive circuit's power avoids the components and parts among the MOS pipe drive circuit to be in the circular telegram state always, realizes protecting components and parts to reduce the energy consumption.

(2) The MOS tube Q7 of the MOS tube driving circuit can realize the function of reverse connection prevention, and when the positive electrode and the negative electrode of the power supply of the DC power supply module are connected in a wrong way, the MOS tube driving circuit stops working.

(3) The utility model provides a pair of novel electronic fuel pump controller can realize overcurrent protection, overvoltage protection, prevent multiple functions such as reversal, and the practicality is strong, and the security is high.

Drawings

FIG. 1 is a block diagram of a novel electronic fuel pump controller provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a novel electronic fuel pump controller provided in an embodiment of the present application;

FIG. 3 is a circuit diagram of a controller of a novel electronic fuel pump controller provided in an embodiment of the present application;

FIG. 4 is a circuit diagram of a driver chip in the novel electronic fuel pump controller according to an embodiment of the present disclosure;

FIG. 5 is a circuit diagram of a MOS transistor driving circuit in a novel electronic fuel pump controller according to an embodiment of the present application;

FIG. 6 is a circuit diagram of a current sensing circuit in a novel electronic fuel pump controller according to an embodiment of the present application;

FIG. 7 is a circuit diagram of a driving power control circuit in the novel electronic fuel pump controller according to an embodiment of the present application;

fig. 8 is a circuit diagram of an under-voltage and over-voltage protection module in a novel electronic fuel pump controller according to an embodiment of the present application.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

As shown in fig. 1, the novel electronic fuel pump controller in this embodiment includes a controller 4, a driver chip 6, a MOS transistor driver circuit 7, a current detection circuit 8, a driver power supply control circuit 5, a DC power supply module 1, a DC power supply to 12V module 2, and a 12V to 5V module 3.

As shown in fig. 1-2, the commissioning interface 10 is used to connect the vehicle body and the controller 4, the vehicle body sends a command to the controller 4 through the commissioning interface 10 to control the operation of the BLDC fuel pump 12, and the controller 4 also feeds back the state of the controller to the vehicle body through a hard wire. The controller 4 is electrically connected with the BLDC fuel pump 12, and the vehicle body 11 is electrically connected with the controller 4.

The controller 4 is used for detecting the position of a rotor in the BLDC fuel pump 12, after the position of the rotor is detected, the controller 4 outputs a corresponding control signal to the driver chip 6 according to the position of the rotor, and the driver chip 6 controls the MOS transistor driver circuit 7 to work according to the signal provided by the controller 4, so as to drive the BLDC fuel pump 12 to work. The BLDC fuel pump 12 has three phase coils, U, V, W being representative of these three sets of coils. As shown in fig. 3, controller 4 may optionally be an FU4812S chip. The first pin and the twenty-fourth pin of the controller 4 are electrically connected to the debug interface 10, the ninth pin of the controller 4, one end of the resistor C40, and the cathode of the zener diode are all electrically connected to +5V, the tenth pin of the controller 4 is grounded to the anode of the zener diode D20, the other end of the capacitor C40 is electrically connected to one end of the capacitor C41, the other end of the capacitor C41 is connected to +5V, the twenty-third pin of the controller 4 and one end of the capacitor C42 are connected to +5V, and the other end of the capacitor C42 is grounded.

The capacitance C40-C41 is a filter capacitance and takes the value of 0.1 uf; the capacitor C42 is a bootstrap capacitor and takes a value of 0.1 uf; the model of the voltage stabilizing diode D20 is SMAJ28A _ C1509532.

And the driving chip 6 is used for receiving the control signal sent by the controller 4 and outputting a driving signal to the MOS tube driving circuit 7. The driving chip 6 in this embodiment may be an FD6288 chip, as shown in fig. 4, a first pin of the driving chip 6 is electrically connected to an eighth pin of the controller 4, a second pin of the driving chip 6 is electrically connected to a seventh pin of the controller 4, a third pin of the driving chip 6 is electrically connected to a sixth pin of the controller 4, a fourth pin of the driving chip 6 is electrically connected to a fifth pin of the controller 4, a fifth pin of the driving chip 6 is electrically connected to a fourth pin of the controller 4, a sixth pin of the driving chip 6 is electrically connected to a third pin of the controller 4, the seventh pin of the driving chip 6, one end of the resistor R50, and one end of the capacitor C51, one end of the TVS diode D10 and one end of the capacitor C52 are both electrically connected to a voltage of +12V, the other end of the TVS diode D10 and the other end of the capacitor C52 are grounded, the eighth pin of the driving chip 6 and the other end of the capacitor C51 are grounded, the other end of the resistor R50 is electrically connected to an anode of the diode D11, an anode of the diode D12, and an anode of the diode D13, a cathode of the diode D11 is electrically connected to a twentieth pin of the driver chip 6 and one end of the capacitor C53, the other end of the capacitor C53 and an eighteenth pin of the driver chip 6 are electrically connected to a W-phase coil of the BLDC fuel pump 12, a cathode of the diode D12 is electrically connected to a seventeenth pin of the driver chip 6 and one end of the capacitor C54, the other end of the capacitor C54 and a fifteenth pin of the driver chip 6 are electrically connected to a V-phase coil of the BLDC fuel pump 12, a cathode of the diode D13 is electrically connected to a fourteenth pin of the driver chip 6 and one end of the capacitor C55, and the other end of the capacitor C55 and a twelfth pin of the driver chip 6 are electrically connected to a U-phase coil of the BLDC fuel pump 12. The output port of the driving chip 6 is electrically connected with the input port of the MOS transistor driving circuit 7.

When each component is electrified, the driving chip 6 applies voltage to the U, V, W coil of the BLDC fuel pump 12, corresponding current is generated on the BLDC fuel pump 12 and flows to the current collecting circuit 8 through the MOS transistor driving circuit 7, the current collecting circuit 8 transmits the current on the BLDC fuel pump 12 to the controller 4 through the sampling resistor R13, and the controller 4 determines the rotor position of the BLDC fuel pump 12 through the current. Judging the rotor position by phase current belongs to the prior art, and is not described in detail herein. The rotor is a magnet which is divided into S, N poles, when any one of two poles is close to any group of three-phase motor coils, a variable current is generated in the coils, the current acquisition circuit 8 transmits the variable current to the controller 4, and the controller 4 detects the position of the rotor through the variable current.

The driving chip 6 can also detect whether each MOS tube in the MOS tube driving circuit 7 is damaged, when each MOS tube in the MOS tube driving circuit 7 is short-circuited, the time for conducting the MOS tube can be long, voltage can be applied to a coil corresponding to the BLDC fuel pump 12 for a long time, the voltage of a capacitor end connected with the corresponding coil of the driving chip 6 can be high, the driving chip 6 can judge which MOS tube fails by detecting the voltage, and then the driving chip 6 stops sending a driving signal to the MOS tube driving circuit 7.

The capacitance C51-C52 is a filter capacitance and takes the value of 0.1 uf; the capacitors C53, C54 and C55 are bootstrap capacitors and take the value of 0.1 uf; r50 is a current-limiting resistor with the value of 1K; diodes D11, D12, and D13 are model IN 4007; the TVS diode model is SZ1SMB24 CATSG. The capacitor C53 and the diode D11 form a bootstrap circuit, the capacitor C54 and the diode D13 form a bootstrap circuit, and the capacitor C55 and the diode D13 form a bootstrap circuit.

And the MOS tube driving circuit 7 is used for driving the BLDC fuel pump 12 to work according to the driving signal sent by the driving chip 6. The output end of the MOS tube driving circuit 7 is electrically connected with the BLDC fuel pump 12. As shown in fig. 4, the MOS transistor driving circuit 7 includes resistors R1, R12 and R13, MOS transistors Q1, Q2, Q3, Q6, capacitors C1, C2 and C3; one end of a resistor R1 is electrically connected to the thirteenth pin of the driver chip 6, the other end of the resistor R1 is electrically connected to the gate of the MOS transistor Q1 and one end of the resistor R2, the other end of the resistor R2 is electrically connected to the source of the MOS transistor Q1, the drain of the MOS transistor Q2, and the U-phase coil of the BLDC fuel pump 12, the drain of the MOS transistor Q1 and one end of the capacitor C1 are connected to the power supply voltage, the other end of the capacitor C1 is grounded, one end of the resistor R3 is electrically connected to the ninth pin of the driver chip 6, the other end of the resistor R3 is electrically connected to the gate of the MOS transistor Q2 and one end of the resistor R4, one end of the resistor R5 is electrically connected to the sixteenth pin of the driver chip 6, the other end of the resistor R5 is electrically connected to the gate of the MOS transistor Q3 and one end of the resistor R6, and the other end of the resistor R6 is electrically connected to the source of the MOS transistor Q3, the drain of the MOS transistor Q4, the fuel pump coil of the BLDC fuel pump 12, the drain of the MOS transistor Q3, one end of the capacitor C2 is connected to a power supply voltage, the other end of the capacitor C2 is grounded, one end of the resistor R7 is electrically connected to the tenth pin of the driver chip 6, the other end of the resistor R7 is electrically connected to the gate of the MOS transistor Q4 and one end of the resistor R8, one end of the resistor R9 is electrically connected to the nineteenth pin of the driver chip 6, the other end of the resistor R9 is electrically connected to the gate of the MOS transistor Q5 and one end of the resistor R10, the other end of the resistor R10 is electrically connected to the source of the MOS transistor Q5, the drain of the MOS transistor Q6, the W-phase coil of the BLDC fuel pump 12, the drain of the MOS transistor Q5 and one end of the capacitor C3 are connected to the power supply voltage, the other end of the capacitor C3 is grounded, one end of the resistor R11 is electrically connected to the eleventh pin of the driver chip 6, the other end of the resistor R11 is electrically connected to the gate of the MOS transistor Q6 and one end of the resistor R12 are electrically connected to the gate of the resistor R4, The source of the MOS transistor Q2, the other end of the resistor R8, the source of the MOS transistor Q4, the other end of the resistor R12, the source of the MOS transistor Q6, and the input end of the current detection circuit 8 are all electrically connected to one end of the resistor R13, and the other end of the resistor R13 is grounded. The MOS tube driving circuit 7 can also control the rotating speed of the fuel pump by adjusting the conduction frequency of the whole MOS tube.

R1, R2, R … … and R12 are conducted current-limiting voltage-reducing resistors, so that the MOS transistor is prevented from being damaged by excessively high impulse voltage instantaneously generated when the MOS transistor is conducted, and the value is 1K; c1 is a filter bypass capacitor, mainly used for filtering interference waves generated by a power supply and a motor and providing energy for starting the motor, and the value is 100 nf; r13 is a current sampling resistor with the value of 1K; the MOS tubes Q1, Q2, Q3, Q6 are in a model of SE20N110, and Q7 is in a model of A02407.

When the controller 4 detects that the rotor position is in the U-phase coil, the controller 4 outputs a control signal to the driving chip 6, the driving chip 6 outputs a driving signal to the MOS tube driving circuit 7, the MOS tube driving circuit 7 controls the conduction of the MOS tube Q1 and the MOS tube Q4, and the BLDC fuel pump 12 works; when the controller 4 detects that the rotor position is in the V-phase coil, the controller 4 outputs a control signal to the driving chip 6, the driving chip 6 outputs a driving signal to the MOS tube driving circuit 7, the MOS tube driving circuit 7 controls the conduction of the MOS tube Q2 and the MOS tube Q6, and the BLDC fuel pump 12 works; when the controller 4 detects that the rotor position is in the W-phase coil, the controller 4 outputs a control signal to the driving chip 6, the driving chip 6 outputs a driving signal to the MOS transistor driving circuit 7, the MOS transistor driving circuit 7 controls the conduction of the MOS transistor Q5 and the MOS transistor Q2, and the BLDC fuel pump 12 works.

And the current detection circuit 8 is used for collecting each phase current of the BLDC fuel pump 12 in normal working and transmitting the phase current to the controller 4, and when each phase current is in existence, the controller 4 can record the normal working of the BLDC fuel pump 12 once, so that the working times of the BLDC fuel pump 12 are recorded. The input end of the current detection circuit 8 is electrically connected with the MOS tube driving circuit 7, and the output end of the current detection circuit 8 is electrically connected with the controller 4. As shown in fig. 5, the current detection circuit 8 includes resistors R31, R32, R33, R35, and a capacitor C36; one end of the capacitor C36 and one end of the resistor R33 are electrically connected to one end of the resistor R13, the other end of the capacitor C36 is grounded to one end of the resistor R31, the other end of the resistor R31 is electrically connected to one end of the resistor R32 and the twentieth pin of the controller 4, the other end of the resistor R32 is electrically connected to the nineteenth pin of the controller 4, the other end of the resistor R33 is electrically connected to the twenty-first pin of the controller 4, one end of the resistor R34 and one end of the resistor R35, the other end of the resistor R34 is connected to +5V, and the other end of the resistor R35 is grounded. When the controller 4 detects that each phase current has an overcurrent condition, it will stop sending control signals to the driving chip.

It should be understood that when the controller detects an over-voltage condition, an under-voltage condition, an over-current condition, etc., the controller is not supposed to operate normally, and the controller 4 sets an operation time, for example, 3min, during which the current detected by the current detecting circuit 7 does not fluctuate and remains stable, which indicates that the BLDC fuel pump 12 operates normally, and the controller 4 records that the BLDC fuel pump 12 operates normally.

Wherein, R31, R32, R33, R35 are divider resistors, and the value is 1 k; the capacitor C36 is a filter capacitor and takes a value of 0.1 uf.

And the driving power supply control circuit 5 is used for controlling the power supply state of the MOS tube driving circuit 7 and cutting off the power supply of the MOS tube driving circuit 7 when the MOS tube driving circuit 7 does not work. The control end of the driving power control circuit 5 is electrically connected with the I/O port of the controller 4, and the output end of the driving power control circuit 5 is electrically connected with the power end of the MOS transistor driving circuit 7. As shown in fig. 5, the driving power control circuit 5 includes resistors R11, R12, R13, and R14, capacitors C11, C12, C13, a.right.right.right., C15, a MOS transistor Q7, a diode D1, and a transistor Q8; the power output end of the DC power module 1 is electrically connected to one end of a capacitor C11, one end of a capacitor C11 is further electrically connected to one end of a capacitor C12, one end of a capacitor C13 and one end of a capacitor C14, respectively, the other end of a capacitor C11, the other end of a capacitor C12, the other end of a capacitor C13 and the other end of a capacitor C14 are grounded, one end of a capacitor C14 is further electrically connected to one end of a resistor R14 and the source of a transistor Q7, the other end of a resistor R14 is electrically connected to one end of a resistor R13 and the gate of a transistor Q7, the other end of a resistor R13 is electrically connected to the collector of a transistor Q8, the base of a transistor Q8 is electrically connected to one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is electrically connected to the I/O port of the controller 4, the other end of the resistor R12 and the emitter of the transistor Q8 are grounded, the drain of the diode Q7 is electrically connected to the anode of a diode D1, the cathode of the diode D1 and one end of the capacitor C15 are connected to the power supply terminal of the MOS transistor drive circuit 7, and the other end of the resistor C15 is grounded. In this embodiment, the I/O port of the controller 4 is the second pin. When the MOS transistor driving circuit 7 does not work, the controller 4 sends a high level signal to the control end of the MOS transistor driving circuit 7, the transistor Q8 is turned on, the MOS transistor Q7 is turned off, the diode D1 is turned off, and then the power supply line between the DC power module 1 and the power end of the MOS transistor driving circuit 7 is cut off.

The capacitors C11, C12, C13 and C14 are filter bypass capacitors and take the value of 100 nf; R11-R12 are conducting current-limiting voltage-reducing resistors, so that the device is prevented from being impacted instantaneously, and the value is 10 k; the diode D1 only serves as a reverse blocking circuit to prevent the UVW end from artificially adding voltage to damage the MOS tube Q7, wherein the model is C727099; c15 is a filter capacitance, and takes a value of 0.1 uf; transistor Q8 is model S8050.

The MOS tube Q7 of the MOS tube driving circuit can realize the function of reverse connection prevention, and when the positive electrode and the negative electrode of the power supply of the DC power supply module are connected in a wrong way, the MOS tube driving circuit stops working.

The under-voltage and over-voltage protection module 9 is used for detecting the voltage provided by the DC power supply module so as to realize an over-voltage protection function; the undervoltage overvoltage protection module 9 transmits the collected voltage signal to the controller 4, and when the detected voltage signal is higher than or lower than the normal working voltage set by the controller 4, the normal working voltage is usually 5V, and the controller 4 does not work. The input end of the undervoltage overvoltage protection module 9 is electrically connected with the electric energy output end of the DC power supply module 1, and the output end of the undervoltage overvoltage protection module 9 is electrically connected with the general input end of the controller 4. As shown in fig. 7, the undervoltage and overvoltage protection module 9 includes resistors R21, R22, and R23, and a capacitor C24; one end of the resistor R21 is electrically connected with the power output end of the DC power supply module 1, the other end of the resistor R21 is electrically connected with one end of the resistor R23 and one end of the resistor R22 respectively, the other end of the resistor R22 and one end of the capacitor C24 are both electrically connected with the universal input end of the controller 4, and one end of the resistor R23 and the other end of the capacitor C24 are grounded. The other end of the resistor R22 and one end of the capacitor C24 are both electrically connected to the eighteenth pin of the controller 4. Wherein, the general input end of the controller 4 is an eighteenth pin.

Wherein, R21, R22 and R23 are divider resistors and take the value of 1 k; the capacitor C24 is a filter capacitor and takes a value of 0.1 uf.

And a DC power supply module 1 for supplying a supply voltage. The voltage range provided by the DC power supply module 1 in this embodiment is 16-36V. The electric energy output end of the DC power supply module 1 is electrically connected with the input end of the DC power supply 12V conversion module 2 and the power supply end of the driving power supply control circuit 5 respectively. As a preferred embodiment of the present invention, a surge voltage limiting circuit and a power supply reverse connection prevention circuit can be further provided to be electrically connected to the DC power supply module 1, the surge voltage limiting circuit is used to realize the functions of surge protection and limiting, so that the output voltage is more stable, and the surge voltage limiting circuit can be realized by adopting the prior art; the power supply reverse connection prevention circuit is used for working when a power supply is reversely connected, the power supply reverse connection prevention circuit is conducted only when the positive pole and the negative pole of the power supply are connected, the power supply of the whole controller is disconnected when the positive pole and the negative pole of the power supply are connected in a wrong mode, and the power supply reverse connection prevention circuit can be achieved by adopting the prior art.

And the DC power conversion 12V module 2 is used for converting the voltage provided by the DC power supply module 1 into 12V voltage. The output end of the DC power conversion 12V module 2 is electrically connected to the power end of the driving chip 6 and the input end of the 12V to 5V module 3, respectively. The DC power supply 12V conversion module 2 does not involve the improvement of the circuit structure, and is implemented by adopting the prior art, which is not described herein.

And the 12V to 5V module 3 is used for converting the 12V voltage into the 5V voltage. The output end of the 12V-to-5V module 3 is electrically connected with the power ends of the controller 4 and the current detection circuit 8 respectively. The 12V to 5V module 3 does not involve the improvement of the circuit structure, and is implemented by adopting the prior art, which is not described herein.

The beneficial effects of this embodiment:

the novel electronic fuel pump controller provided by the embodiment realizes accurate acquisition of data such as the service condition, the number of times of the fuel pump through the current detection circuit, controls the power supply state of the MOS tube driving circuit through the driving power supply control circuit, and when the MOS tube driving circuit does not work, disconnects the power supply of the MOS tube driving circuit, avoids components and parts in the MOS tube driving circuit to be always in the power-on state, realizes protecting the components and parts, and reduces the energy consumption.

The novel electronic fuel pump controller provided by the embodiment can realize multiple functions of overcurrent protection, overvoltage protection, reverse connection prevention and the like, and is high in practicability and safety.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A novel electronic fuel pump controller is characterized by comprising a controller (4), a driving chip (6), an MOS tube driving circuit (7), a current detection circuit (8), a driving power supply control circuit (5), a DC power supply module (1), a DC power supply to 12V module (2) and a 12V to 5V module (3);

2. The novel electronic fuel pump controller of claim 1, characterized in that the MOS transistor drive circuit (7) comprises resistors R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, MOS transistors Q1, Q2, Q3, Q4, Q5, Q6, capacitors C1, C2 and C3; one end of a resistor R1 is electrically connected with a thirteenth pin of the driving chip (6), the other end of the resistor R1 is electrically connected with a gate of a MOS transistor Q1 and one end of a resistor R2 respectively, the other end of the resistor R2 is electrically connected with a source of a MOS transistor Q1, a drain of the MOS transistor Q2 and a U-phase coil of a BLDC fuel pump (12), a drain of a MOS transistor Q1 and one end of a capacitor C1 are connected with a power supply voltage, the other end of the capacitor C1 is grounded, one end of a resistor R3 is electrically connected with a ninth pin of the driving chip (6), the other end of a resistor R3 is electrically connected with a gate of a MOS transistor Q2 and one end of a resistor R4 respectively, one end of a resistor R5 is electrically connected with a sixteenth pin of the driving chip (6), the other end of the resistor R5 is electrically connected with a gate of a MOS transistor Q3 and one end of a resistor R6, the other end of a resistor R6 is electrically connected with a source of a MOS transistor Q3, a drain of a MOS transistor Q4 and a BLV coil of a BLDC fuel pump (12) respectively, the drain of the MOS tube Q3 and one end of the capacitor C2 are connected with a power supply voltage, the other end of the capacitor C2 is grounded, one end of the resistor R7 is electrically connected with the tenth pin of the driving chip (6), the other end of the resistor R7 is electrically connected with the gate of the MOS tube Q4 and one end of the resistor R8 respectively, one end of the resistor R9 is electrically connected with the nineteenth pin of the driving chip (6), the other end of the resistor R9 is electrically connected with the gate of the MOS tube Q5 and one end of the resistor R10 respectively, the other end of the resistor R10 is electrically connected with the source of the MOS tube Q5, the drain of the MOS tube Q6 and the W-phase coil of the BLDC fuel pump (12), the drain of the MOS tube Q5 and one end of the capacitor C3 are connected with the power supply voltage, the other end of the capacitor C3 is grounded, one end of the resistor R11 is electrically connected with the eleventh pin of the driving chip (6), the other end of the resistor R11 is electrically connected with the gate of the MOS tube Q2 and one end of the resistor R8269556 respectively, the other end of the resistor R4, the source of the MOS transistor Q2, the other end of the resistor R8, the source of the MOS transistor Q4, the other end of the resistor R12, the source of the MOS transistor Q6 and the input end of the current detection circuit (8) are all electrically connected with one end of the resistor R13, and the other end of the resistor R13 is grounded.

3. A novel electronic fuel pump controller according to claim 2, characterized in that said current sensing circuit (8) comprises resistors R31, R32, R33, R34, R35 and a capacitor C36; one end of a capacitor C36 and one end of a resistor R33 are both electrically connected with one end of a resistor R13, the other end of the capacitor C36 is grounded with one end of a resistor R31, the other end of a resistor R31 is respectively electrically connected with one end of the resistor R32 and a twentieth pin of the controller (4), the other end of the resistor R32 is electrically connected with a nineteenth pin of the controller (4), the other end of the resistor R33 is respectively electrically connected with a twenty-first pin of the controller (4), one end of a resistor R34 and one end of a resistor R35, the other end of a resistor R34 is connected with +5V voltage, and the other end of the resistor R35 is grounded.

4. The controller of the novel electronic fuel pump according to claim 1, wherein the driving power supply control circuit (5) comprises resistors R11, R12, R13 and R14, capacitors C11, C12, C13, C14, C15, a MOS transistor Q7, a diode D1 and a triode Q8; the power output end of the DC power supply module (1) is electrically connected with one end of a capacitor C11, one end of a capacitor C11 is respectively and electrically connected with one end of a capacitor C12, one end of a capacitor C13 and one end of a capacitor C14, the other end of a capacitor C11, the other end of a capacitor C12, the other end of a capacitor C13 and the other end of a capacitor C14 are grounded, one end of a capacitor C14 is respectively and electrically connected with one end of a resistor R14 and the source of a MOS transistor Q7, the other end of a resistor R14 is respectively and electrically connected with one end of a resistor R13 and the gate of a MOS transistor Q7, the other end of a resistor R13 is electrically connected with the collector of a triode Q8, the base of a triode Q8 is respectively and electrically connected with one end of a resistor R11 and one end of a resistor R12, the other end of the resistor R11 is electrically connected with an I/O port 497 of a controller (4), the other end of the resistor R5478 and the emitter of the triode Q8 are both grounded, the drain of a MOS transistor Q6855 is electrically connected with the anode 1, the cathode of the diode D1 and one end of the capacitor C15 are connected with the power supply end of the MOS tube driving circuit (7), and the other end of the resistor C15 is grounded.

5. The new electronic fuel pump controller of claim 1 further comprising an under-voltage and over-voltage protection module (9); the input end of the undervoltage overvoltage protection module (9) is electrically connected with the electric energy output end of the DC power supply module (1), and the output end of the undervoltage overvoltage protection module (9) is electrically connected with the universal input end of the controller (4).

6. The new electronic fuel pump controller of claim 5, characterized in that the undervoltage overvoltage protection module (9) comprises resistors R21, R22 and R23, a capacitor C24; one end of the resistor R21 is electrically connected with the power output end of the DC power supply module (1), the other end of the resistor R21 is electrically connected with one end of the resistor R23 and one end of the resistor R22 respectively, the other end of the resistor R22 and one end of the capacitor C24 are both electrically connected with the universal input end of the controller (4), and one end of the resistor R23 and the other end of the capacitor C24 are grounded.

7. The novel electronic fuel pump controller of claim 1 further comprising a debug interface (10); the debugging interface (10) is electrically connected with the controller (4).

8. A new electronic fuel pump controller according to claim 2, characterised in that the driver chip (6) is a FD6288 chip.