Fuel pump with backup oil supply function

Abstract

A fuel pump with a backup oil supply function comprises an oil storage barrel and an upper cover, an oil outlet pipe is arranged on the upper cover, a filter, a first oil pump and a second oil pump are arranged in the oil storage barrel, pump oil outlets of the first oil pump and the second oil pump are communicated with the filter through oil conveying pipes, and check valves are arranged at the joints of the pump oil outlets and the filter. The filter is communicated with the oil outlet pipe through an oil conveying pipe, the upper cover is further provided with a first plug and a second plug which are electrically connected with the first oil pump and the second oil pump respectively, and the first plug and the second plug are connected with a relay through wires. The relay controls opening and closing of the first oil pump and the second oil pump, when the first oil pump breaks down, the second oil pump starts to supply oil, the core potential safety hazard that once a traditional single-pump fuel pump breaks down, a vehicle flames out is fundamentally solved, and the safety and reliability of vehicle running are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel pump, in particular to a fuel pump with backup oil supply. BACKGROUND

[0002] The fuel pump is one of the core components of the oil supply system of the modern fuel vehicle engine, and its function is to deliver the fuel in the fuel tank to the engine with stable pressure and flow. The traditional fuel pump usually adopts single pump design, that is, an electric fuel pump is integrated in the oil storage barrel (or oil cup), and after being filtered by the filter, the fuel is supplied to the engine through the oil outlet pipe. Although this structure is simple and mature, it has a significant shortcoming: once the fuel pump fails (such as motor burnout, carbon brush wear, impeller jamming, etc.), the oil supply will be immediately interrupted, causing the engine to stall, and the vehicle to lose power, which may cause serious safety accidents under high-speed driving or complex road conditions. SUMMARY

[0003] The utility model aims at solving the deficiency of prior art, provides a fuel pump with backup oil supply, which eliminates the risk of stalling caused by single pump failure, and improves the safety and reliability of the fuel supply system.

[0004] The utility model discloses a technical scheme for solving the technical problems: a fuel pump with backup oil supply, comprising an oil storage barrel, an oil inlet communicating with the fuel tank is arranged at the bottom of the oil storage barrel, an upper cover is arranged at the upper side of the oil storage barrel, an oil outlet pipe is arranged on the upper cover, a filter, a first oil pump and a second oil pump are arranged in the oil storage barrel, the pump oil outlets of the first oil pump and the second oil pump are communicated with the filter through oil conveying pipes, and check valves are arranged at the connecting positions, the filter is communicated with the oil outlet pipe through an oil conveying pipe, first and second plugs electrically connected with the first and second oil pumps are further arranged on the upper cover, and the first and second plugs are connected with a relay through wires, and the relay controls the opening and closing of the first and second oil pumps.

[0005] With the above structure, check valves are arranged at the connecting positions of the pump oil outlets of the first and second oil pumps and the filter, which ensures that the pump oil paths of the two oil pumps are independent of each other, prevents fuel backflow, and when the first oil pump fails, the second oil pump starts to supply oil, the check valves can effectively block the leakage or resistance path formed by the faulty pump, ensure the oil supply efficiency and system pressure stability of the second oil pump, fundamentally solve the core safety hazard that the vehicle stalls once the traditional single pump fuel pump fails, and greatly improve the safety and reliability of vehicle driving.

[0006] As preferred, a mounting seat is buckled at the upper end port of the oil storage barrel, a first mounting hole for mounting the first oil pump and the second oil pump and a second mounting hole for mounting the filter are formed in the mounting seat, a filter screen frame is arranged at the lower side of the mounting seat corresponding to the oil inlet of the first oil pump and the second oil pump, and a filter screen is arranged on the filter screen frame. With the above structure, the double filtration design of the filter screen and the filter is adopted, and especially when the second oil pump is started, it can ensure that the fuel sucked has been preliminarily cleaned, thereby reducing the risk of clogging of the oil inlet due to long-term idling and ensuring the rapid and reliable starting of the standby pump.

[0007] As preferred, a plurality of guide rods are slidably arranged on the mounting seat, the upper ends of the guide rods are connected with an upper cover, and the upper cover is arranged on the upper side of the port of the oil storage barrel through the guide rods.

[0008] As preferred, a spray pipe is arranged at the bottom of the oil storage barrel, a spray connecting pipe is arranged at the oil outlet side of the first oil pump and communicates with the spray pipe, a spray chamber communicating with the inner cavity of the oil storage barrel is arranged at the bottom of the oil storage barrel corresponding to the spray port of the spray pipe, an oil return pipe communicating with the spray chamber and the oil tank is further arranged on the oil storage barrel, and an oil return connecting pipe communicating with the inner cavity of the oil storage barrel is arranged at the oil outlet side of the second oil pump. With the above structure, the first oil pump outlet side is provided with a spray connecting pipe leading to the spray chamber at the bottom of the oil storage barrel, forming a small flow circulation, which can continuously spray fuel in the spray chamber to generate negative pressure when the first oil pump is working, so as to suck the fuel in the oil tank into the oil storage barrel through the oil return pipe. At the same time, the arrangement of the spray connecting pipe and the oil return connecting pipe can improve the flowability of the fuel, improve the heat dissipation conditions of the whole module, and prolong the service life of the double pump.

[0009] As preferred, the pipe diameters of the spray connecting pipe and the oil return connecting pipe are smaller than the pipe diameter of the oil conveying pipe. With the above structure, the fuel flow of the spray connecting pipe and the oil return connecting pipe is effectively controlled to ensure the oil supply of the oil conveying pipe.

[0010] As preferred, a signal line is further connected between the first plug and the relay for the relay to detect the working state of the first oil pump. With the above structure, the system connects the relay through the signal line, which can monitor the working state of the first oil pump in real time and quickly (manually or automatically) switch to the second oil pump.

[0011] As preferred, the relay is connected with a signal output device through a signal line for outputting the working state of the first oil pump. With the above structure, the system can immediately send a warning signal to the driver through the signal when detecting the failure of the first oil pump.

[0012] The utility model discloses a relay state monitoring and early warning and control double pump work, and set up the oil circuit of preventing reverse on double pump, not only solved the fundamental defect of traditional fuel pump single point failure namely invalidation, additionally improved the cleanliness of system, heat dissipation and maintainability, provided a set of high reliability, high security, intelligent complete solution for vehicle fuel supply system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model embodiment;

[0014] Figure 2 It is the internal structure schematic diagram of the utility model embodiment;

[0015] Figure 3 It is the installation structure schematic diagram of the utility model mounting seat;

[0016] Figure 4 It is the whole structure schematic diagram of the utility model mounting seat;

[0017] Figure 5 It is the cross section structure schematic diagram of the utility model injection pipe;

[0018] Figure 6 It is the circuit diagram of the utility model relay.

[0019] In the drawing: 1, oil storage bucket;2, upper cover;3, oil outlet pipe;4, filter;5, first oil pump;6, second oil pump;7, oil delivery pipe;8, check valve;9, first plug;10, second plug;11, wire;12, relay;13, mounting seat;14, first mounting hole;15, second mounting hole;16, filter screen frame;17, filter screen;18, guide rod;19, injection pipe;20, injection connecting pipe;21, injection cavity;22, oil return pipe;23, oil return connecting pipe;24, signal line;25, signal output ware. DETAILED DESCRIPTION

[0020] The technical scheme of the utility model will be further specifically explained below by specific embodiment, and combining with the drawings.

[0021] Embodiment: as Figures 1 to 6The illustrated fuel pump with backup oil supply includes an oil storage tank 1, the bottom of which is provided with an oil inlet communicating with the oil tank, the upper side of the oil storage tank 1 is provided with an upper cover 2, the upper cover 2 is provided with an oil outlet pipe 3, the oil storage tank 1 is provided with a filter 4, a first oil pump 5 and a second oil pump 6, the pump oil outlets of the first oil pump 5 and the second oil pump 6 are communicated with the filter 4 through oil conveying pipes 7, and check valves 8 are arranged at the connection positions, check valves 8 are arranged at the connection positions of the pump oil outlets of the first and second oil pumps 6 and the filter 4, which ensures that the pump oil paths of the two oil pumps are independent of each other, preventing fuel backflow, the filter 4 is communicated with the oil outlet pipe 3 through the oil conveying pipe 7, the upper cover 2 is further provided with a first plug 9 and a second plug 10 which are electrically connected with the first oil pump 5 and the second oil pump 6 respectively, the first plug 9 and the second plug 10 are connected with a relay 12 through a wire 11, the relay 12 controls the opening and closing of the first oil pump 5 and the second oil pump 6, when the first oil pump 5 fails, the second oil pump 6 starts to supply oil, the check valve 8 can effectively block the leakage or resistance path that may be formed by the faulty pump, ensuring the oil supply efficiency and system pressure stability of the second oil pump 6, fundamentally solving the core safety hazard that the traditional single-pump fuel pump causes the vehicle to stall once it fails, greatly improving the safety and reliability of vehicle driving. The first plug 9 and the relay 12 are further connected by a signal line 24 for the relay 12 to detect the working state of the first oil pump 5, the system connects the relay 12 through the signal line 24, which can monitor the working state of the first oil pump 5 in real time, and can quickly (manually or automatically) switch to the second oil pump 6, the relay 12 is connected with a signal output device 25 through the signal line 24 for outputting the working state of the fuel pump, the system can immediately send a warning signal to the driver through the signal when detecting that the first oil pump 5 fails.

[0022] A mounting seat 13 is buckled at the upper end port of the oil storage tank 1, the mounting seat 13 is provided with a first mounting hole 14 for mounting the first oil pump 5 and the second oil pump 6 and a second mounting hole 15 for mounting the filter 4, a filter screen frame 16 is arranged at the lower side of the mounting seat 13 corresponding to the pump oil inlets of the first oil pump 5 and the second oil pump 6, and a filter screen 17 is arranged on the filter screen frame 16, a double filtration design of the filter screen 17 and the filter 4 is adopted, especially when the second oil pump 6 starts, it can ensure that the fuel sucked has been preliminarily cleaned, reducing the risk of clogging of the oil inlet due to long-term idling, and ensuring the quick and reliable start of the standby pump; a plurality of guide rods 18 are slidably arranged on the mounting seat 13, the upper ends of the plurality of guide rods 18 are connected with the upper cover 2, and the upper cover 2 is arranged on the upper side of the port of the oil storage tank 1 through the guide rods 18.

[0023] As preferred, the oil storage tank 1 is provided with a spray pipe 19 at the bottom, the pump oil outlet side of the first oil pump 5 is provided with a spray connecting pipe 20 in communication with the spray pipe 19, the bottom of the oil storage tank 1 is provided with a spray cavity 21 in communication with the inner cavity of the oil storage tank 1 corresponding to the spray opening of the spray pipe 19, the oil storage tank 1 is further provided with an oil return pipe 22 connecting the spray cavity 21 and the oil tank, the pump oil outlet side of the second oil pump 6 is provided with an oil return connecting pipe 23 in communication with the inner cavity of the oil storage tank 1, the outlet side of the first oil pump 5 is provided with the spray connecting pipe 20 leading to the spray cavity 21 at the bottom of the oil storage tank 1, forming a small flow circulation, which can continuously spray fuel into the spray cavity 21 to generate negative pressure when the first oil pump 5 is working, so as to suck the fuel in the oil tank into the oil storage tank 1 through the oil return pipe 22, at the same time, the spray connecting pipe 20 and the oil return connecting pipe 23 can improve the flowability of the fuel, improve the heat dissipation condition of the whole module, and prolong the service life of the double pump; the pipe diameter of the spray connecting pipe 20 and the oil return connecting pipe 23 is smaller than the pipe diameter of the oil conveying pipe 7, which effectively controls the fuel flow of the spray connecting pipe 20 and the oil return connecting pipe 23, and ensures the oil supply of the oil conveying pipe 7.

[0024] In use, the first oil pump 5 works, and the second oil pump 6 is in a shutdown state, when the relay 12 receives a shutdown caused by a fault of the first oil pump 5, a signal is output through the signal output device 25, then the driver can manually control the switch on the relay 12 to switch on the second oil pump 6 to pump oil, avoiding the situation that the vehicle is shut down due to insufficient fuel supply of the fuel pump caused by the fault of the first oil pump 5, the relay 12 state monitoring and early warning and control double pump work, and the reverse oil circuit is arranged on the double pump, not only solving the fundamental defect that the traditional fuel pump single point failure is invalid, but also additionally improving the cleanliness, heat dissipation and maintainability of the system, providing a complete solution of high reliability, high safety and intelligence for the vehicle fuel supply system.

[0025] The above-mentioned embodiment is only a preferred scheme of the utility model, and does not limit the utility model in any form, and other variants and modifications can be made without exceeding the technical scheme recorded in the claims.

Claims

1. A fuel pump with backup oil supply, comprising an oil storage tank (1), the bottom of the oil storage tank (1) is provided with an oil inlet communicating with an oil tank, the upper side of the oil storage tank (1) is provided with an upper cover (2), and the upper cover (2) is provided with an oil outlet pipe (3), characterized in that: The oil storage bucket (1) is provided with a filter (4), a first oil pump (5) and a second oil pump (6), the pump oil outlets of the first oil pump (5) and the second oil pump (6) are communicated with the filter (4) through oil pipes (7), and the connection portions are provided with check valves (8); the filter (4) is communicated with the oil outlet pipe (3) through an oil pipe (7); the upper cover (2) is further provided with a first plug (9) and a second plug (10) electrically connected with the first oil pump (5) and the second oil pump (6) respectively; the first plug (9) and the second plug (10) are connected with a relay (12) through wires (11); and the relay (12) controls the opening and closing of the first oil pump (5) and the second oil pump (6).

2. The fuel pump with a backup supply of fuel as defined in claim 1, characterized in that: A mounting seat (13) is buckled on the upper end of the oil storage bucket (1), the mounting seat (13) is provided with a first mounting hole (14) for mounting the first oil pump (5) and the second oil pump (6) and a second mounting hole (15) for mounting the filter (4), and a filter screen frame (16) is arranged on the lower side of the mounting seat (13) and corresponds to the pump oil inlets of the first oil pump (5) and the second oil pump (6); and the filter screen frame (16) is provided with a filter screen (17).

3. The fuel pump with a backup supply of fuel as defined in claim 2, characterized in that: A plurality of guide rods (18) are slidably arranged on the mounting seat (13), the upper ends of the guide rods (18) are connected with the upper cover (2), and the upper cover (2) is arranged on the upper side of the port of the oil storage bucket (1) through the guide rods (18).

4. The fuel pump with a backup supply of fuel as defined in claim 1, characterized in that: The bottom of the oil storage bucket (1) is provided with a spray pipe (19), the pump oil outlet side of the first oil pump (5) is provided with a spray connecting pipe (20) communicated with the spray pipe (19), the bottom of the oil storage bucket (1) is provided with a spray cavity (21) communicated with the inner cavity of the oil storage bucket (1) and corresponding to the spray port of the spray pipe (19), the oil storage bucket (1) is further provided with an oil return pipe (22) communicated with the spray cavity (21) and an oil tank, and the pump oil outlet side of the second oil pump (6) is provided with an oil return connecting pipe (23) communicated with the inner cavity of the oil storage bucket (1).

5. The fuel pump with a backup supply of fuel as defined in claim 4, characterized in that: The pipe diameters of the spray connecting pipe (20) and the oil return connecting pipe (23) are smaller than the pipe diameter of the oil pipe (7).

6. The fuel pump with a backup supply of fuel as defined in claim 1, characterized in that: A signal line (24) is further connected between the first plug (9) and the relay (12), and is used for detecting the working state of the first oil pump (5) by the relay (12).

7. The fuel pump with a backup supply of fuel as defined in claim 1, characterized in that: The relay (12) is connected with a signal output device (25) through the signal line (24), and is used for outputting the working state of the first oil pump (5).

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