CN210127916U

CN210127916U - Fuel pump

Info

Publication number: CN210127916U
Application number: CN201920720468.6U
Authority: CN
Inventors: 李悦朋; 李进东; 杨明豪; 刘芸俊; 李海霞; 岑光娒
Original assignee: Weifang Chenxiang Power Technology Co Ltd
Current assignee: Weifang Chenxiang Power Technology Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-03-06
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a fuel pump, which comprises a pump body and a motor, wherein the motor is controlled by a controller to work; the controller is electrically connected with an ECU (electronic control unit) through a linear beam motor, and the working rotating speed and time of the fuel pump are controlled through the instruction of the ECU; the controller is pressed and fixed on the controller bracket through the cover plate; the controller bracket is fixedly arranged at one end of the motor; a check valve is integrated on the controller bracket; a drain valve is integrated on the pump body; a bracket is sleeved on the shell of the motor; the bracket is used for fixing and pressing the sealing ring when the fuel pump is installed; the bracket is in interference fit with the motor; the utility model can prevent fuel backflow in the working process of the fuel delivery pump; the oil leakage probability of the fuel pipeline can be reduced, and the safety is improved; the flexibility of product design and preparation can be increased, the mould expense has been reduced, can realize that motor and controller are integrated, and the integrated level is high, and the cost is reduced can also adjust the flow of fuel pump according to the engine demand.

Description

Fuel pump

Technical Field

The utility model relates to a fuel pump belongs to fuel pump technical field.

Background

In order to solve the problem of difficult exhaust of the engine, a fuel pump driven by electric power needs to be integrated on a filter, but the existing fuel pump has the following problems.

1. The controller and the motor body are independent, the integration level is not high, and extra cost is increased.

2. After the engine stops working, fuel can flow back due to factors such as gravity and the like, the starting and normal working of the engine are influenced, and the problem of how to prevent the fuel from flowing back is also a difficult problem in the industry. The existing fuel pump on the market does not have the function of preventing or reducing fuel backflow.

3. In the existing fuel pump on the market, the pressure of the fuel pump can rise in the working process, and when the pressure is too high, the oil leakage probability of a fuel pipeline can be increased, so that the fuel pipe has the oil leakage phenomenon, and a great safety risk is realized;

4. the fuel pump on the existing market is provided with a mold for sealing between a motor and a filter base, a plastic support with a longer length is manufactured to be used for compressing a sealing ring, when the motor or the filter base is changed, a support mold is required to be provided again, and the flexibility and the cost are higher.

5. The internal rotating speed of the existing fuel pump on the market is basically related to parameters set in a controller, and the rotating speed cannot be adjusted according to the requirement of an engine, so that the flow is adjusted.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a fuel pump which can prevent the fuel from flowing backwards in the working process of the fuel pump; the oil leakage probability of the fuel pipeline can be reduced, and the safety is improved; the flexibility of product design and preparation can be increased, the mould expense has been reduced, can realize that motor and controller are integrated, and the integrated level is high, and the cost is reduced can also adjust the flow of fuel pump according to the engine demand.

For solving the technical problem, the utility model discloses a following technical scheme: the utility model provides a fuel pump, includes the pump body and motor, its characterized in that: the motor is controlled to work by the controller; a communication module which is communicated with an engine control unit EUC is arranged in the controller; the controller is electrically connected with an ECU (electronic control unit) through a linear beam motor, and the working speed and time of the fuel pump are controlled through the instruction of the ECU.

Furthermore, the controller is pressed and fixed on the controller bracket through the cover plate; the controller bracket is fixedly arranged at one end of the motor;

further, a check valve is integrated on the controller bracket; the check valve is used for preventing the fuel from flowing back; the check valve is of a piston structure; an oil outlet is formed in one end, connected with the motor, of the controller support.

Further, a drain valve is integrally arranged on the pump body; the drain valve performs bypass draining when the fuel pressure is overhigh; the drain valve is of a piston structure.

Furthermore, a bracket is sleeved on the shell of the motor; the bracket is used for fixing and pressing the sealing ring when the fuel pump is installed; the bracket is in interference fit with the motor; the mounting position of the bracket on the motor shell is controlled by the machining position of the bracket mounting step.

Further, the pump body is arranged at one end of the motor and is of a roller pump structure; an oil inlet is formed in the lower end of the pump body; the pump body is provided with a filter screen, and the filter screen is arranged on one side of the oil inlet; the filter screen is used for filtering impurities in the fuel oil.

Further, the bracket mounting step is arranged on a shell of the motor; the bracket mounting step is formed by machining; the support mounting step is a circular ring-shaped step.

Further, the motor is a brush motor or a brushless motor; the controller adopts a brush motor controller or a brushless motor controller.

Further, arc-shaped grooves are formed in the controller support and the cover plate, and are used for placing wire harnesses; the arc-shaped groove is of a semicircular structure.

The utility model adopts the above technical scheme after, compare with prior art, have following advantage:

1. the controller and the motor are integrated, so that the integration level is higher, and the cost is reduced;

2. fuel backflow can be prevented;

3. when the fuel pressure is too high, the leakage flow is discharged through the leakage valve, the fuel pressure can be controlled, the oil leakage probability of a fuel pipeline is reduced, and the safety is improved;

4. in addition, the interference fit mounting bracket is adopted on the motor, the fixing position of the bracket can be controlled by machining the motor shell, the flexibility of product design and manufacture is increased, and the cost of a die is reduced.

5. The controller can communicate with the engine ECU to adjust the speed and thus the flow rate according to the engine requirements.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is an oil circuit diagram of the present invention;

in the figure, the position of the upper end of the main shaft,

1-pump body, 101-filter screen, 102-relief valve, 2-support, 3-motor, 301-support mounting step, 4-controller support, 401-check valve, 5-wiring harness, 6-cover plate, 7-controller, 8-arc groove, 9-oil inlet and 10-oil outlet.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1A fuel pump assembly

As shown in fig. 1-3, the present invention provides a fuel pump, which comprises a pump body 1, a motor 3 and a controller 7; the pump body 1 is arranged at one end of the motor 3, and the pump body 1 is of a roller pump structure; an oil inlet 9 is formed in the lower end of the pump body 1;

a filter screen 101 is arranged on the pump body 1, and the filter screen 101 is arranged on one side of the oil inlet 9; the filter screen 101 is used for filtering impurities in the fuel oil;

the pump body 1 is further integrally provided with a drain valve 102, and the drain valve 102 is of a piston structure; the drain valve 102 performs bypass drain when the fuel pressure is too high;

the motor 3 is of a brush motor or brushless motor structure; a bracket 2 is sleeved on the shell of the motor 3; the bracket 2 is used for fixing and pressing the sealing ring when the fuel pump is installed; the bracket 2 is of a circular ring structure;

the bracket 2 is in interference fit with the motor 3; a bracket mounting step 301 is arranged on the shell of the motor 3; the bracket mounting step 301 is machined; the bracket mounting step 301 is a circular step; the position of the bracket mounting step 301 controls the mounting position of the bracket 2 on the shell of the motor 3;

the other end of the motor 3 is provided with a controller bracket 4; a check valve 401 is integrally arranged on the controller support 4, and the check valve 401 is of a piston structure; the check valve 401 is used to prevent the fuel from flowing backward;

an oil outlet 10 is formed in one end, connected with the motor 3, of the controller support 4;

the controller 7 adopts a brush motor controller or a brushless motor controller; the controller 7 is fixedly arranged at one end of the controller bracket 4, and the controller 7 is used for controlling the motor 3 to work; a communication module which is communicated with an engine control unit EUC is arranged in the controller 7;

the controller 7 is electrically connected with the wire harness 5; the other end of the wire harness 5 is connected with a power supply, the other end of the wire harness 5 is also electrically connected with an engine control unit ECU, and the working speed and time of the fuel pump are controlled through the instruction of the ECU;

the controller 7 is pressed and fixed on the controller bracket 4 through the cover plate 6; arc-shaped grooves 8 are formed in the controller support 4 and the cover plate 6, and the arc-shaped grooves 8 are used for placing the wire harnesses 5; the arc-shaped groove 8 is of a semicircular structure;

the utility model discloses a theory of operation:

the controller 7 is powered by a power supply to control the motor 3 to work, the motor 3 drives the pump body 1 to rotate, fuel oil is sucked from the oil inlet 9, the fuel oil is filtered by the filter screen 101 and enters the pump body 1, the check valve 401 is pushed open by pressurization of the pump body 1, the fuel oil is pumped out of the oil outlet 10, and air in front of the fuel oil is automatically extruded and discharged in the flowing process of the fuel oil.

By integrating the check valve 401 on the controller bracket 4, the fuel is prevented from flowing backwards when the engine stops working;

by integrating the drain valve 101 on the pump body 1, when the pressure rises, the drain valve 101 is jacked open to form a bypass drain oil path, so that oil leakage caused by overhigh fuel pressure is effectively prevented, and the safety is improved;

adopt interference fit installing support 2 on the shell of motor 3, support 2 fixed position can be controlled through the processing position of support mounting step 301 on motor 3, has increased the flexibility of product design and preparation, has reduced the mould expense.

The controller 7 is internally provided with a communication module which is communicated with an engine control unit ECU, the engine control unit ECU can be electrically connected through the wiring harness 5, the content of the engine control unit ECU is identified, the internal parameters of the motor 3 are adjusted, the rotating speed of the motor 3 is controlled, and the flow of the motor 3 is controlled.

The utility model can prevent fuel backflow in the working process of the fuel delivery pump; the oil leakage probability of the fuel pipeline can be reduced, and the safety is improved; the flexibility of product design and preparation can be increased, the mould expense has been reduced, can realize that motor and controller are integrated, and the integrated level is high, and the cost is reduced can also adjust the flow of fuel pump according to the engine demand.

The foregoing is illustrative of the best mode of the invention, and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical teaching of the present invention is also within the protection scope of the present invention.

Claims

1. The utility model provides a fuel pump, includes pump body (1) and motor (3), its characterized in that: the motor (3) is controlled to work by the controller (7); a communication module which is communicated with an engine control unit EUC is arranged in the controller (7); the controller (7) is electrically connected with an engine control unit ECU through a wiring harness (5), and the working speed and time of the fuel pump are controlled through the ECU instruction.

2. A fuel pump as set forth in claim 1, wherein: the controller (7) is pressed and fixed on the controller bracket (4) through the cover plate (6); the controller bracket (4) is fixedly arranged at one end of the motor (3);

a check valve (401) is integrally arranged on the controller bracket (4); the check valve (401) is used for preventing the fuel from flowing back; the check valve (401) is of a piston structure; an oil outlet (10) is formed in one end, connected with the motor (3), of the controller support (4).

3. A fuel pump as set forth in claim 1, wherein: a drain valve (102) is integrally arranged on the pump body (1); the drain valve (102) performs bypass drain when the fuel pressure is overhigh; the drain valve (102) is of a piston structure.

4. A fuel pump as set forth in claim 1, wherein: a bracket (2) is sleeved on the shell of the motor (3); the bracket (2) is used for fixing and pressing the sealing ring when the fuel pump is installed; the bracket (2) is in interference fit with the motor (3); the mounting position of the bracket (2) on the shell of the motor (3) is controlled by the machining position of the bracket mounting step (301).

5. A fuel pump as set forth in claim 1, wherein: the pump body (1) is arranged at one end of the motor (3), and the pump body (1) is of a roller pump structure; an oil inlet (9) is formed in the lower end of the pump body (1); a filter screen (101) is arranged on the pump body (1), and the filter screen (101) is arranged on one side of the oil inlet (9); the filter screen (101) is used for filtering impurities in the fuel oil.

6. A fuel pump as set forth in claim 4, wherein: the bracket mounting step (301) is arranged on the shell of the motor (3); the bracket mounting step (301) is formed by machining; the support mounting step (301) is a circular step.

7. A fuel pump as set forth in claim 1, wherein: the motor (3) is a brush motor or a brushless motor; the controller (7) adopts a brush motor controller or a brushless motor controller.

8. A fuel pump as set forth in claim 2, wherein: arc-shaped grooves (8) are formed in the controller support (4) and the cover plate (6), and the arc-shaped grooves (8) are used for placing the wire harnesses (5); the arc-shaped groove (8) is of a semicircular structure.