Fuel pump assembly with control function

Abstract

The utility model provides a fuel pump assembly with a control function, which is characterized in that the fuel pump assembly comprises an upper cover, a lower cover and a fuel pump, an electric fuel pump and a pressure release valve are installed in the bottom shell, the pressure release valve is connected with the electric fuel pump through a first oil outlet corrugated pipe, and the pressure release valve is connected with the upper cover through a second oil outlet corrugated pipe; a supporting rod and a filter pipe set are arranged between the upper cover and the bottom shell, an installation shell is arranged on the upper cover, a control chip is installed in the installation shell, and a control pipeline assembly is arranged below the upper cover. The power supply voltage of the electric fuel pump is adjusted by arranging the control chip in the upper cover, the power supply voltage of the electric fuel pump is changed through oil pressure, and the practicability degree is high.

Description

Technical Field

[0001] The utility model relates to a fuel pump assembly with a control function. Background Art

[0002] The electric fuel pump is a device that continuously sucks fuel from the fuel tank and provides fuel at a specified pressure and flow rate to the fuel system. Based on the function of the electric fuel pump, it can be seen that the performance of the electric fuel pump will directly affect the working performance of the engine.

[0003] The electric fuel pump consists of three parts: the pump body, the DC motor and the housing. Its basic working principle is that the DC motor drives the rotor in the pump housing to rotate at high speed after being energized. Electricity is required during the working process, and its power supply voltage is mostly unable to be adjusted, or an external controller is required to adjust it. At the same time, based on the start-stop function of the current new cars, the energy consumption is too high in the idle state. It is necessary to reduce the voltage in the idle state to reduce energy consumption. Utility Model Content

[0004] The purpose of the utility model is to address the above-mentioned problems in the existing technology and to propose a fuel pump assembly with a control function, which adjusts the power supply voltage of the electric fuel pump by building a control chip into the upper cover and changes the power supply voltage of the electric fuel pump by oil pressure. It has a high degree of practicality and reduces the voltage for the start-stop function of the car to reduce energy consumption.

[0005] The purpose of the utility model can be achieved through the following technical solutions: A fuel pump assembly with a control function, characterized in that it includes:

[0006] An upper cover having an oil outlet nozzle;

[0007] A bottom shell, inside which an electric fuel pump and a pressure relief valve are installed, the pressure relief valve and the electric fuel pump are connected via a first oil outlet bellows, and the pressure relief valve and the upper cover are connected via a second oil outlet bellows;

[0008] A support rod and a filter pipe group are provided between the upper cover and the bottom shell. A mounting shell is provided on the upper cover. A control chip is installed in the mounting shell. A control pipeline assembly is provided below the upper cover.

[0009] Furthermore, a controller is integrated on the control chip, a copper piece is fixed under the control chip by injection molding, and a heat-conducting adhesive is provided between the copper piece and the control chip.

[0010] Furthermore, a connecting joint is connected to the copper piece, the connecting joint is connected to the second oil outlet bellows, and the oil outlet of the second oil outlet bellows is aligned with the copper piece.

[0011] Furthermore, a retaining spring is provided between the connecting joint and the copper part for fixing.

[0012] Furthermore, a third oil outlet bellows is provided below the connecting joint and is connected to the oil outlet nozzle.

[0013] Furthermore, the connecting joint is located on the side wall below the second oil outlet bellows and is connected to a small bellows that passes upward through the upper cover and is connected to the control chip. A pressure sensor is integrated on the control chip. The sensing head of the pressure sensor is arranged below the control chip, and the small bellows is connected to the sensing head.

[0014] Furthermore, the control chip is fixed to the upper cover by self-tapping screws, and the upper cover of the mounting shell is provided with a buckle cover and axially sealed by a sealing ring.

[0015] Furthermore, a voltage output terminal is provided on the upper cover and is connected to the electric fuel pump via a wire plug.

[0016] Furthermore, the control chip adopts a cortex-m3 microprocessor.

[0017] Compared with the prior art, the advantages of the present application are: it adjusts the power supply voltage of the electric fuel pump by building a control chip into the upper cover, and changes the power supply voltage of the electric fuel pump by oil pressure, and has a high degree of practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the fuel pump assembly;

[0019] Figure 2 It is a schematic diagram of the bottom shell removal;

[0020] Figure 3 It is a schematic diagram of the upper cover;

[0021] Figure 4 It is a schematic diagram of the upper part of the fuel pump assembly;

[0022] Figure 5 This is a schematic diagram of the upper part of the fuel pump assembly without the connecting joint and small bellows;

[0023] Figure 6 This is a schematic diagram of installing the housing and removing the buckle cover;

[0024] In the figure, 1, upper cover; 101, connecting joint; 1011, retaining ring; 1012, copper part; 102, third oil outlet bellows; 103, small bellows; 11, support rod; 12, filter pipe group; 13, oil outlet nozzle; 14, installation shell; 141, buckle cover; 142, sealing ring; 15, voltage output terminal; 16, wire plug; 2, bottom shell; 21, electric fuel pump; 22, second oil outlet bellows; 23, first oil outlet bellows; 24, pressure relief valve; 3, control chip; 31, pressure sensor; 311, sensor head; 32, controller; 33, self-tapping screw. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention.

[0026] like Figure 1-6 As shown, a fuel pump assembly with a control function is characterized in that it includes:

[0027] An upper cover 1 having an oil outlet nozzle 13;

[0028] The bottom shell 2 has an electric fuel pump 21 and a pressure relief valve 24 installed therein. The pressure relief valve 24 is connected to the electric fuel pump 21 via a first oil outlet bellows 23, and the pressure relief valve 24 is connected to the upper cover 1 via a second oil outlet bellows 22.

[0029] A support rod 11 and a filter pipe group 12 are provided between the upper cover 1 and the bottom shell 2. A mounting shell 14 is provided on the upper cover 1. A control chip 3 is installed in the mounting shell 14. A control pipeline assembly is provided below the upper cover 1.

[0030] Furthermore, the control chip 3 is integrated with a controller 32, a copper piece 1012 is fixed below the control chip 3 by injection molding, and a thermal conductive adhesive is provided between the copper piece 1012 and the control chip 3. At the same time, the heat 31 generated by the controller on the control chip 3 is dissipated to the copper piece 1012 through the thermal conductive adhesive for heat conduction.

[0031] Furthermore, the copper part 1012 is connected with a connection joint 101, and the connection joint 101 is connected to the second oil outlet bellows 22, and the oil outlet of the second oil outlet bellows 22 is aligned with the copper part 1012. The fuel rushes out from the oil outlet of the second oil outlet bellows 22 and passes through the copper part 1012, so that the flowing fuel contacts the copper part 1012 for heat dissipation.

[0032] Furthermore, a retaining spring 1011 is provided between the connection joint 101 and the copper piece 1012 for fixing.

[0033] Furthermore, a third oil outlet bellows 102 is provided below the connecting joint 101 and is connected to the oil outlet nozzle 13 .

[0034] Furthermore, a small bellows 103 is connected to the side wall of the connection joint 101 located below the second oil outlet bellows 22, and passes upward through the upper cover 1 to connect with the control chip 3. The control chip 3 is integrated with a pressure sensor 31. The induction head 311 of the pressure sensor 31 is arranged below the control chip 3, and the small bellows 103 is connected to the induction head 311. The fuel in the connection joint 101 flows out through the small bellows 103 to impact the induction head 311, so that the pressure sensor 31 obtains the fuel pressure. The heat of the pressure sensor 31 is also conducted to the copper part 1012 through the heat conductive glue.

[0035] Furthermore, the control chip 3 is fixed to the upper cover 1 by self-tapping screws 33, and the upper cover 1 of the mounting housing 14 is provided with a buckle cover 141 and axially sealed by a sealing ring 142. The buckle cover 141 and the upper cover 1 are axially sealed by a sealing ring 142 to prevent debris from entering the circular cavity, thereby protecting the control chip 3 from being damaged.

[0036] Furthermore, the upper cover 1 is provided with a voltage output terminal 15 and is connected to the electric fuel pump 21 via a wire plug 16 .

[0037] In this application, the control chip 3 uses a cortex-m3 microprocessor;

[0038] First, in the present application, the heat generated by the controller 32 and the pressure sensor 31 on the control chip 3 is conducted to the copper part 1012 by the heat conductive adhesive. The front end of the copper part 1012 is located at the outlet of the second oil outlet bellows 22 (i.e., immersed in the pipeline fuel). The flowing fuel contacts the copper part 1012 to cool it down. The fuel delivered by the electric fuel pump 21 passes through the first oil outlet bellows 23 and is pressure-regulated by the pressure relief valve 24 to effectively prevent the pipeline from over-pressure explosion and cause safety accidents. The fuel is then discharged to the copper part 1012 through the second oil outlet bellows 22 to take away the heat of the copper part 1012 for heat dissipation and cooling.

[0039] Second, in the present application, a small bellows 103 is provided on the connecting joint 101 and connected to the sensing head 311 of the pressure sensor 31. The pressure sensor 31 is linked to the control chip 3 to adjust the supply voltage (current) of the electric fuel pump 21 according to the pressure change. When the pressure is 376-395 kPa, the current will drop to 2 A, and when it is lower than this value, the current is 12 A.

[0040] The present application inputs a rated voltage from the plug of the upper cover 1, and the pressure sensor 31 on the control chip 3 senses the oil pressure change to adjust the pressure, and dissipates the heat of the copper part 1012 through the flowing fuel.

[0041] The technical solution of the above utility model provides a solution that is significantly different from the prior art to address the technical problem that the prior art solution is too single. The parts not involved in the technical solution of this application are the same as the prior art or can be implemented by using the prior art and will not be described in detail.

[0042] The technical solutions in the above embodiments have clearly and completely described the contents of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Claims

1. A fuel pump assembly with a control function, characterized in that: It includes: An upper cover having an oil outlet nozzle; A bottom shell, inside which an electric fuel pump and a pressure relief valve are installed, the pressure relief valve and the electric fuel pump are connected via a first oil outlet bellows, and the pressure relief valve and the upper cover are connected via a second oil outlet bellows; A support rod and a filter pipe group are provided between the upper cover and the bottom shell. A mounting shell is provided on the upper cover. A control chip is installed in the mounting shell. A control pipeline assembly is provided below the upper cover.

2. A fuel pump assembly with control function according to claim 1, characterized in that: A controller is integrated on the control chip, a copper piece is fixed under the control chip by injection molding, and heat-conducting glue is provided between the copper piece and the control chip.

3. A fuel pump assembly with control function according to claim 2, characterized in that: The copper piece is connected with a connecting joint, the connecting joint is connected to the second oil outlet bellows, and the oil outlet of the second oil outlet bellows is aligned with the copper piece.

4. A fuel pump assembly with control function according to claim 3, characterized in that: A clip is provided between the connecting joint and the copper piece for fixing.

5. A fuel pump assembly with control function according to claim 4, characterized in that: A third oil outlet bellows is provided below the connecting joint and is connected to the oil outlet nozzle.

6. A fuel pump assembly with control function according to claim 4, characterized in that: The connecting joint is located on the side wall below the second oil outlet bellows and is connected to a small bellows that passes upward through the upper cover and is connected to the control chip. A pressure sensor is integrated on the control chip. The sensing head of the pressure sensor is arranged below the control chip, and the small bellows is connected to the sensing head.

7. A fuel pump assembly with control function according to claim 1, characterized in that: The control chip is fixed to the upper cover by self-tapping screws, and the upper cover of the mounting housing is provided with a buckle cover and axially sealed by a sealing ring.

8. A fuel pump assembly with control function according to claim 1, characterized in that: The upper cover is provided with a voltage output terminal and is connected to the electric fuel pump through a wire plug.

9. A fuel pump assembly with control function according to claim 1, characterized in that: The control chip adopts a cortex-m3 microprocessor.

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