A variable speed brushless motor methanol pump

Abstract

The invention discloses a variable speed brushless motor methanol pump, comprising a methanol pump and a brushless motor, wherein the brushless motor is integrated in the methanol pump and drives the methanol pump to work, the control board of the brushless motor is integrated in the methanol pump to control the brushless motor to work, and the output end of the brushless motor drives the rotating parts of the methanol pump to work; an oil outlet connector, an oil inlet connector and a connector are provided on the methanol pump, the connector is electrically connected to the control board of the brushless motor, the control board is connected to the engine crankshaft signal, and the engine crankshaft signal is converted to control the rotation of the brushless motor; or the control board is connected to the ECU using a CAN communication method to send a signal, and the ECU uses a CAN communication method to send a signal to control the rotation of the brushless motor. The invention can make the oil delivery pump change the output flow and pressure, and maintain a relatively high pressure of 12 bar to weaken the pipeline-level fuel filter resistance, which can meet the requirements of the injection pump with large flow.

Description

Technical Field

[0001] The invention relates to the technical field of methanol oil delivery pumps, and in particular to a methanol pump with a variable speed brushless motor. Background Art

[0002] The traditional methanol fuel pump has an operating pressure of 3 to 5 bar and can only operate at one stable speed. The pump oil flow rate is very different from the flow rate under different working conditions. It will cause a large amount of oil leakage at idle speed and increase heat loss, which will not only increase the fuel temperature but also place high requirements on the pressure relief valve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a brushless motor methanol pump with a variable speed that can adjust the oil delivery amount according to the engine speed in response to the above-mentioned problems existing in the prior art.

[0004] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0005] A variable speed brushless motor methanol pump comprises a methanol pump and a brushless motor, wherein the brushless motor is integrated in the methanol pump and drives the methanol pump to work, the control board of the brushless motor is also integrated in the methanol pump to control the brushless motor to work, and the output end of the brushless motor drives the rotating parts of the methanol pump to work; an oil outlet joint, an oil inlet joint and a connector are arranged on the methanol pump, and the connector is electrically connected to the control board of the brushless motor, characterized in that the control board is connected to an engine crankshaft signal through the connector, and controls the rotation of the brushless motor after the conversion of the engine crankshaft signal; or the control board is connected to an ECU through the connector to send signals using a CAN communication method, and controls the rotation of the brushless motor after the conversion of the signal sent by the ECU using the CAN communication method.

[0006] In a preferred embodiment of the present invention, the oil outlet connector is connected to the oil outlet pipe by means of a conical thread, and the oil inlet connector is connected to the oil inlet pipe by means of a conical thread.

[0007] In a preferred embodiment of the present invention, the oil outlet connector and the oil inlet connector are arranged at two ends of the methanol pump axis direction and are not coaxial, so that methanol flows through each component of the methanol pump and the brushless motor, and heat is well dissipated.

[0008] In a preferred embodiment of the present invention, the oil outlet connector is connected to the low-pressure chamber of the fuel injection pump through an oil outlet pipe, a temperature sensor is connected in series to the oil outlet pipe, and the temperature sensor is connected to the control board signal of the brushless motor.

[0009] In a preferred embodiment of the present invention, a pressure-stabilizing valve is connected in series between the oil outlet pipe and the low-pressure chamber of the fuel injection pump, and the pressure-stabilizing valve is connected to the fuel tank so that abnormal pressure fluctuations in the oil outlet pipe can flow back into the fuel tank through the pressure-stabilizing valve.

[0010] In a preferred embodiment of the present invention, the output end of the brushless motor is drivingly connected to the rotating part of the methanol pump through a link buckle, and the rotating part of the methanol pump includes an internal gear and an external gear that mesh with each other, wherein the internal gear is drivingly connected to the output end of the brushless motor.

[0011] In a preferred embodiment of the present invention, a ceramic sheet is disposed at each end of the inner gear and the outer gear.

[0012] Due to the adoption of the above technical scheme, the present invention improves the reliability and durability of operation because the brushless motor methanol pump adopts a brushless motor, and the integrated integral structure allows the fuel to flow through the surface of each heating component to take away the heat in time, and the adjustable oil delivery improves the effective efficiency of oil delivery, reduces heat loss, and makes the fuel temperature more stable. The high-pressure fuel injection temperature determines the quality of cyclic injection, and the consistency of the high-pressure injection temperature of each cylinder affects the consistency of the cyclic injection amount; the low-pressure fuel supply temperature affects the oil absorption fuel quality of the high-pressure system, and then affects the high-pressure injection characteristics. Therefore, it is of great significance to study the brushless motor methanol pump with stepless speed regulation.

[0013] Compared with the traditional fuel pump, the present invention can reduce the amount of oil leakage, save energy and reduce consumption, and significantly slow down the temperature rise of the fuel. Since the density of the fuel is linearly proportional to the temperature of the fuel, the consistency of the cyclic injection amount under the condition of the same injection pulse width of each cylinder can be further improved by increasing the temperature of the high-pressure injection fuel of each cylinder. In addition, the present invention can maintain a relatively high pressure of 12 bar to overcome the resistance of the pipeline-level fuel filter to meet the requirements of the injection pump with large flow.

[0014] The present invention can change the output flow and pressure of the fuel pump and maintain a relatively high pressure of 12 bar to weaken the resistance of the pipeline-level fuel filter, which can meet the needs of fuel injection pumps with large flow rates. The principle is that the methanol fuel pump can receive the engine crankshaft signal, change the speed according to the demand, and adapt to different injection flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the appearance of the variable speed brushless motor methanol pump of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal structure of the variable speed brushless motor methanol pump of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with structural schematic diagrams and embodiments, but the present invention is not limited to the scope of the embodiments.

[0018] See also Figure 1 and Figure 2 A variable speed brushless motor methanol pump shown in the figure includes a methanol pump 10 and a brushless motor 20, wherein the brushless motor 20 is integrated in the methanol pump 10 and drives the methanol pump to work, and the control board 21 of the brushless motor 20 is also integrated in the methanol pump to control the brushless motor 20 to work, and the output end 22 of the brushless motor 20 drives the rotating part 11 of the methanol pump 10 to work; an oil outlet connector 12, an oil inlet connector 13 and a connector 14 are provided on the methanol pump 10, and the connector 14 is electrically connected to the control board 21 of the brushless motor 20.

[0019] The present invention is characterized in that: the control board 21 is connected to the engine crankshaft signal through the connector 14, and controls the rotation of the rotating part of the brushless motor 20 after the engine crankshaft signal is converted; or the control board 21 is connected to the ECU through the connector 14 by sending signals in the CAN communication mode, and controls the rotation of the brushless motor 20 after the ECU sends signals in the CAN communication mode. In this way, the methanol oil pump can receive the engine crankshaft signal, change the rotation speed according to the demand, and adapt to different injection flow rates.

[0020] In addition, the oil outlet connector 12 is connected to the oil outlet pipe by means of a conical thread, and the oil inlet connector 13 is connected to the oil inlet pipe by means of a conical thread, which meets the connection sealing requirement of 12 bar.

[0021] The oil outlet connector 12 and the oil inlet connector 13 are arranged at two ends of the axial direction of the methanol pump 10 and are not coaxial, so that methanol flows through each component of the methanol pump 10 and the brushless motor 20, and heat dissipation is good.

[0022] The oil outlet connector 12 is connected to the low-pressure chamber of the fuel injection pump (not shown in the figure) through an oil outlet pipe (not shown in the figure), and a temperature sensor (not shown in the figure) is connected in series to the oil outlet pipe, and the temperature sensor is connected to the control board 21 of the brushless motor 20. Compared with the traditional fuel delivery pump, this can reduce the amount of oil leakage, save energy and reduce consumption, and significantly slow down the temperature rise of the fuel. Since the density of the fuel is linearly proportional to the temperature of the fuel, the consistency of the cyclic injection amount under the condition of the same injection pulse width of each cylinder can be further improved by increasing the temperature of the high-pressure injection fuel of each cylinder.

[0023] In addition, a pressure stabilizing valve is connected in series between the oil outlet pipe and the low-pressure chamber of the fuel injection pump. The pressure stabilizing valve is connected to the fuel tank so that abnormal pressure fluctuations in the oil outlet pipe can flow back into the fuel tank through the pressure stabilizing valve.

[0024] The output end 22 of the brushless motor 20 is connected to the rotating part 11 of the methanol pump 10 through a link buckle. The rotating part 11 of the methanol pump 10 includes an inner gear 11a and an outer gear 11b that mesh with each other, wherein the inner gear 11a is connected to the output end 22 of the brushless motor 20. A ceramic sheet 11c and 11d are respectively arranged at both ends of the inner gear 11a and the outer gear 11b. The output end 22 of the brushless motor 20 drives the inner gear 11a and the outer gear 11b to rotate through the connecting buckle. Since there is an eccentricity between the inner gear 11a and the outer gear 11b, the inner gear 11a, the outer gear 11b and the ceramic sheets 11c and 11d cooperate to form a change in the cavity volume, thereby generating negative pressure to suck fuel from the oil inlet connector 13. The fuel flows through each component of the methanol pump 10 and the brushless motor 20, takes away heat for the working components, and is then pumped out from the oil outlet connector 12. In order to meet the different needs of various models, the flow rate under different pressures can be calibrated to achieve the level of "one machine for all".

Claims

1. A variable speed brushless motor methanol pump, comprising a methanol pump and a brushless motor, wherein the brushless motor is integrated in the methanol pump and drives the methanol pump to work, the control board of the brushless motor is also integrated in the methanol pump to control the brushless motor to work, and the output end of the brushless motor drives the rotating parts of the methanol pump to work; an oil outlet connector, an oil inlet connector and a connector are arranged on the methanol pump, and the connector is electrically connected to the control board of the brushless motor, characterized in that: The control board is connected to the engine crankshaft signal through the connector, and controls the rotation of the brushless motor after converting the engine crankshaft signal; or the control board is connected to the ECU through the connector using the CAN communication method to send signals, and controls the rotation of the brushless motor after converting the signals sent by the ECU using the CAN communication method.

2. A variable speed brushless motor methanol pump according to claim 1, characterized in that: The oil outlet joint is connected to the oil outlet pipe by using a conical thread, and the oil inlet joint is connected to the oil inlet pipe by using a conical thread.

3. A variable speed brushless motor methanol pump according to claim 1, characterized in that: The oil outlet connector and the oil inlet connector are arranged at two ends of the methanol pump axis direction and are not coaxial, so that methanol flows through each component of the methanol pump and the brushless motor, and heat dissipation is good.

4. A variable speed brushless motor methanol pump according to claim 1, characterized in that: The oil outlet connector is connected to the low-pressure chamber of the fuel injection pump through an oil outlet pipe, a temperature sensor is connected in series to the oil outlet pipe, and the temperature sensor is connected to the control board signal of the brushless motor.

5. The variable speed brushless motor methanol pump according to claim 1, characterized in that: A pressure stabilizing valve is connected in series between the oil outlet pipe and the low-pressure chamber of the fuel injection pump. The pressure stabilizing valve is connected to the fuel tank so that abnormal pressure fluctuations in the oil outlet pipe can flow back into the fuel tank through the pressure stabilizing valve.

6. A variable speed brushless motor methanol pump according to claim 1, characterized in that: The output end of the brushless motor is drivingly connected to the rotating part of the methanol pump through a link buckle, and the rotating part of the methanol pump includes an internal gear and an external gear meshing with each other, wherein the internal gear is drivingly connected to the output end of the brushless motor.

7. A variable speed brushless motor methanol pump according to claim 6, characterized in that: A ceramic sheet is respectively arranged at both ends of the inner gear and the outer gear.

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