Fuel pump for four-wheel-drive vehicle

Abstract

A fuel pump for a four-wheel-drive vehicle comprises an oil storage barrel, an upper cover, a first oil inlet pipe and an oil outlet pipe, a filter and an oil pump are arranged in the oil storage barrel, a siphon cavity is formed in the oil storage barrel in a separated mode through a partition plate, a second oil inlet pipe is further arranged at the bottom of the siphon cavity, and the oil pump is arranged on the inner side of the filter and integrated with the filter. An inlet in the lower end of the oil pump penetrates through the filter and extends to the outer side of the filter, an adjusting valve is arranged on the side wall of the filter and communicated with the oil outlet pipe through a corrugated pipe, a siphon assembly communicated with the adjusting valve is further arranged on the oil storage barrel, and the lower end of the siphon assembly extends into the siphon cavity and is communicated with the second oil inlet pipe. The first oil inlet pipe is detachably connected with a second injection pipe communicated with the adjusting valve, and the lower side of the second injection pipe and the lower side of the first oil inlet pipe are each provided with an oil injection opening used for injecting oil into the oil storage barrel. The system has the advantages of high efficiency, energy conservation, convenience in maintenance, suitability for high-fuel-consumption vehicles such as off-road vehicles and four-wheel-drive vehicles, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuel pump, especially a fuel pump for four-wheel drive vehicle. BACKGROUND

[0002] Traditional fuel pump usually adopts single oil inlet pipe structure, and relies on oil pump to directly suck fuel from the bottom of fuel tank. However, when four-wheel drive vehicle and the like are running, the vehicle can be in a state of tilting, jolting or extreme angle driving, which causes fuel liquid level to deviate, oil inlet to be exposed, and further causes fuel supply to be interrupted, fuel supply to be insufficient and engine to be stalled. Although part of fuel pumps adopt double oil path design or add auxiliary fuel tank to cope with the above problems, such scheme is usually complex in structure, high in cost, and low in efficiency due to passive oil suction. In addition, the filter, oil pump and pressure relief valve of traditional fuel pump are designed in a split type, which is inconvenient for installation and maintenance, and lacks in sealing property and reliability, and is prone to fuel leakage or pressure imbalance after long-term use. SUMMARY

[0003] The utility model aims at solving the deficiency of prior art, and provides a fuel pump for four-wheel drive vehicle, which is stable and efficient in fuel supply and convenient to maintain.

[0004] The utility model provides a fuel pump for four-wheel drive vehicle, which comprises an oil storage barrel and an upper cover, the bottom of the oil storage barrel is provided with a first oil inlet pipe connected with a fuel tank, the upper cover is provided with an oil outlet pipe, the oil storage barrel is provided with a filter and an oil pump, the oil storage barrel is divided into a siphon chamber by a partition plate, the bottom of the siphon chamber is further provided with a second oil inlet pipe, the oil pump is arranged on the inner side of the filter and is integrally arranged with the filter, the inlet of the lower end of the oil pump penetrates through the filter and extends to the outer side of the filter, the side wall of the filter is provided with an adjusting valve communicated with the inner cavity of the filter, the adjusting valve is communicated with the oil outlet pipe on the upper cover through a corrugated pipe, the oil storage barrel is further provided with a siphon assembly communicated with the adjusting valve, the lower end of the siphon assembly extends into the siphon chamber and is communicated with the second oil inlet pipe, the first oil inlet pipe is detachably connected with a second jet pipe communicated with the adjusting valve, and the second jet pipe and the lower side of the first oil inlet pipe are both provided with an oil inlet port for injecting oil into the oil storage barrel.

[0005] The above structure is adopted, the independent siphon chamber is divided in the oil storage barrel through the partition plate, and the second oil inlet pipe is arranged, so that at least one oil inlet port can keep immersed in fuel when the vehicle is tilted, fuel is sucked into the main oil chamber by the siphon assembly, the rapid balance of fuel is realized, fuel supply interruption is avoided, fuel flow can be actively adjusted, the setting of the oil inlet port can optimize the fuel flow path, the oil suction efficiency is improved, and the utility model is especially suitable for use in off-road vehicles, four-wheel drive vehicles and the like high fuel consumption vehicles, the filter and the oil pump are designed in an integrated mode, the connecting parts are reduced, and the leakage risk is reduced.

[0006] Preferably, the upper cover is arranged on the upper side of the oil storage barrel port through a support rod, a return spring is sleeved between the oil storage barrel and the upper cover, and an electric control assembly is arranged on the upper cover. By adopting the above structure, the upper cover is connected floatingly through the support rod and the return spring, vibration transmission is reduced, and the service life of the electric control assembly is improved.

[0007] Preferably, an oil level sensor assembly is arranged on the outer side of the oil storage barrel, and the oil level sensor assembly is electrically connected with the electric control assembly. By adopting the above structure, the fuel quantity is monitored in real time, the oil supply strategy is intelligently adjusted through the electric control assembly, and the fuel management precision is improved.

[0008] Preferably, a bracket is sleeved outside the filter, an insertion block is arranged on the outer periphery of the bracket, an insertion slot matched with the insertion block is arranged on the outer side of the oil storage barrel port, and the filter is arranged in the oil storage barrel through the bracket. By adopting the above structure, the filter is quickly installed through the insertion block and the insertion slot structure, the assembly process is simplified, and the maintenance convenience is improved.

[0009] Preferably, a filter screen is arranged at the inlet of the oil pump corresponding to the lower end of the filter, a limiting sleeve and a first sealing ring are sleeved at the outlet of the oil pump, and a power line harness connected with the electric control assembly is connected to the oil pump. By adopting the above structure, the limiting sleeve and the first sealing ring are arranged at the outlet of the oil pump, and the connection stability and the sealing property are ensured.

[0010] Preferably, an adjusting valve core is arranged in the adjusting valve, a second sealing ring is sleeved between the top end and the middle segment position of the adjusting valve core and the adjusting valve, and a retainer ring is sleeved on both sides of the second sealing ring at the middle segment position of the adjusting valve core. By adopting the above structure, the second sealing ring and the retainer ring structure are adopted, and the sealing property and the durability are improved.

[0011] Preferably, a pressure relief valve is arranged on the adjusting valve, a pressure relief valve core is slidably arranged in the pressure relief valve, a return spring is arranged between the end of the pressure relief valve core and the pressure relief valve, and a fuel discharge port communicating with the inner cavity of the oil storage barrel is further arranged on the pressure relief valve. By adopting the above structure, when the oil pressure is too high, the pressure is automatically released, the system is prevented from being overloaded, and the excess fuel is guided back to the oil storage barrel through the fuel discharge port, so that waste is avoided.

[0012] Preferably, the siphon assembly comprises a siphon bracket, the siphon bracket is arranged at the position corresponding to the siphon cavity of the oil storage barrel port and is connected with the side opposite to the pressure relief valve of the adjusting valve through a first hose, the lower side of the siphon bracket is provided with a first jet pipe and a siphon pipe which are connected with each other, the lower ends of the first jet pipe and the siphon pipe extend into the siphon cavity, the lower end of the siphon pipe is inserted into a second oil inlet pipe and is connected with the second oil inlet pipe, a third sealing ring is sleeved between the siphon pipe and the second oil inlet pipe, and when the first jet pipe sprays oil, negative pressure is generated to make the siphon pipe suck oil from the second oil inlet pipe and inject the oil into the oil storage barrel through the first jet pipe.

[0013] As preferred, the second injection pipe is communicated with the regulating valve through a second hose, a siphon bracket and a first hose, the second injection pipe is provided with buckles on both sides, the first oil inlet pipe is provided with clamping blocks matched with the buckles, and the second injection pipe is detachably buckled on the first oil inlet pipe through the buckles and the clamping blocks, oil injection of the second injection pipe into the first oil inlet pipe generates negative pressure and increases the oil injection speed of the first oil inlet pipe.

[0014] The utility model has the advantages of high efficiency and energy saving, convenient maintenance, and application to off-road vehicles, four-wheel drive vehicles and other high fuel consumption vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the embodiment of the utility model;

[0016] Figure 2 is the structure schematic diagram of the filter of the utility model;

[0017] Figure 3 is a side view of the filter of the utility model;

[0018] Figure 4 is the enlarged view of A of the utility model; Figure 3

[0019] Figure 5 is the structure schematic diagram of the oil storage barrel of the utility model.

[0020] In the drawing: 1, oil storage barrel; 2, upper cover; 3, first oil inlet pipe; 4, oil outlet pipe; 5, filter; 6, oil pump; 7, partition plate; 8, second oil inlet pipe; 9, regulating valve; 10, corrugated pipe; 11, second injection pipe; 12, oil injection port; 13, supporting rod; 14, return spring; 15, electric control assembly; 16, oil level sensor assembly; 17, support; 18, plug block; 19, plug groove; 20, filter screen; 21, limiting sleeve; 22, first sealing ring; 23, power line bundle; 24, regulating valve core; 25, second sealing ring; 26, check ring; 27, pressure relief valve; 28, pressure relief valve core; 29, reset spring; 30, oil discharge port; 31, siphon bracket; 32, first hose; 33, first injection pipe; 34, siphon pipe; 35, third sealing ring; 36, second hose; 37, buckle; 38, clamping block. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be further specifically explained below by means of specific embodiments and in combination with the drawings.

[0022] Embodiment: as Figures 1 to 5 ​The fuel pump for a four-wheel drive vehicle shown comprises a fuel storage tank 1, an upper cover 2, the bottom of the fuel storage tank 1 is provided with a first oil inlet pipe 3 connected with the fuel tank, the upper cover 2 is provided with an oil outlet pipe 4, the fuel storage tank 1 is provided with a filter 5 and an oil pump 6, the fuel storage tank 1 is divided into a siphon chamber by a partition plate 7, the bottom of the siphon chamber is further provided with a second oil inlet pipe 8, the independent siphon chamber is separated in the fuel storage tank 1 by the partition plate 7, and the second oil inlet pipe 8 is arranged, so that at least one oil inlet can be kept immersed in fuel when the vehicle is inclined, the oil pump 6 is arranged inside the filter 5 and is integrally arranged with the filter 5, the inlet at the lower end of the oil pump 6 penetrates the filter 5 and extends to the outside of the filter 5, the side wall of the filter 5 is provided with an adjusting valve 9 communicated with the inner cavity of the filter 5, the adjusting valve 9 is communicated with the oil outlet pipe 4 on the upper cover 2 through a corrugated pipe 10, the fuel storage tank 1 is further provided with a siphon assembly communicated with the adjusting valve 9, fuel is sucked into the main oil chamber by the siphon assembly, the rapid balance of fuel is realized, the fuel supply is avoided to be interrupted, the fuel flow can be actively adjusted, the lower end of the siphon assembly extends into the siphon chamber and is communicated with the second oil inlet pipe 8, the first oil inlet pipe 3 is detachably connected with a second jet pipe 11 communicated with the adjusting valve 9, the second jet pipe 11 and the lower side of the first oil inlet pipe 3 are both provided with an oil inlet port 12 for injecting fuel into the fuel storage tank 1, the arrangement of the oil inlet port 12 can optimize the fuel flow path and improve the oil absorption efficiency, and the filter 5 and the oil pump 6 are designed in an integrated manner, so that the connection components are reduced and the risk of leakage is reduced.

[0023] The upper cover 2 is arranged on the upper side of the port of the fuel storage tank 1 through a support rod 13, a return spring 14 is sleeved between the fuel storage tank 1 and the upper cover 2, the upper cover 2 is floatingly connected through the support rod 13 and the return spring 14, vibration transmission is reduced, and the service life of the electronic control assembly 15 is improved. The outer side of the fuel storage tank 1 is provided with an oil level sensor assembly 16, the oil level sensor assembly 16 is electrically connected with the electronic control assembly 15, the fuel quantity is monitored in real time, the fuel supply strategy is intelligently adjusted through the electronic control assembly 15, and the fuel management precision is improved.

[0024] The outer side of the filter 5 is sleeved with a bracket 17, the outer periphery of the bracket 17 is provided with an insertion block 18, the outer side of the port of the fuel storage tank 1 is provided with an insertion slot 19 matched with the insertion block 18, the filter 5 is arranged in the fuel storage tank 1 through the bracket 17 and is quickly installed through the structure of the insertion block 18 and the insertion slot 19, the assembly process is simplified, and the maintenance convenience is improved; the lower end of the filter 5 is provided with a filter screen 20 corresponding to the inlet of the oil pump 6, a limiting sleeve 21 and a first sealing ring 22 are sleeved at the outlet of the upper end of the oil pump 6, the oil pump 6 is connected with a power line harness 23 connected with the electronic control assembly 15, the limiting sleeve 21 and the first sealing ring 22 are arranged at the outlet of the oil pump 6, so that the stability and sealing performance of the connection are ensured.

[0025] The adjusting valve 9 is internally provided with an adjusting valve core 24, the top end and middle section position of the adjusting valve core 24 are both sleeved with a second sealing ring 25 between the adjusting valve core 24 and the adjusting valve 9, the second sealing ring 25 of the middle section position of the adjusting valve core 24 is sleeved with a check ring 26 on both sides, the second sealing ring 25 and the check ring 26 are adopted to improve the sealing property and durability; the adjusting valve 9 is provided with a pressure relief valve 27, the pressure relief valve 27 is internally slidably provided with a pressure relief valve core 28, the end of the pressure relief valve core 28 is provided with a return spring 29 between the pressure relief valve core 28 and the pressure relief valve 27, the pressure relief valve 27 is further provided with an oil discharge port 30 in communication with the inner cavity of the oil storage barrel 1, when the oil pressure is too high, the pressure is automatically discharged to prevent system overload, and the excess fuel is guided back to the oil storage barrel 1 through the oil discharge port 30 to avoid waste.

[0026] The siphon assembly comprises a siphon bracket 31, the siphon bracket 31 is arranged at the siphon cavity corresponding to the port of the oil storage barrel 1 and is connected with the side of the adjusting valve 9 opposite to the pressure relief valve 27 through the first hose 32, the lower side of the siphon bracket 31 is provided with a first jet pipe 33 and a siphon pipe 34 in communication with the siphon bracket 31, the lower ends of the first jet pipe 33 and the siphon pipe 34 extend into the siphon cavity, the lower end of the siphon pipe 34 is inserted into the second oil inlet pipe 8 and is in communication with the second oil inlet pipe 8, the third sealing ring 35 is sleeved between the siphon pipe 34 and the second oil inlet pipe 8, the negative pressure generated when the first jet pipe 33 sprays oil causes the siphon pipe 34 to suck oil from the second oil inlet pipe 8 and inject the oil into the oil storage barrel 1 through the first jet pipe 33. The second jet pipe 11 is connected with the adjusting valve 9 through the second hose 36, the siphon bracket 31 and the first hose 32, the second jet pipe 11 is provided with buckles 37 on both sides, the first oil inlet pipe 3 is provided with clamping blocks 38 matched with the buckles 37, the second jet pipe 11 is detachably buckled on the first oil inlet pipe 3 through the buckles 37 and the clamping blocks 38, the second jet pipe 11 sprays oil into the first oil inlet pipe 3 to generate negative pressure and increase the oil injection speed of the first oil inlet pipe 3, the first oil inlet pipe 3 and the second jet pipe 11 are fixed through the buckles 37, which is convenient for replacement or cleaning.

[0027] The above-mentioned embodiment is only a preferred scheme of the present application, and does not limit the present application 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 for a four-wheel drive vehicle, comprising a fuel reservoir (1), an upper cover (2), a first fuel inlet pipe (3) communicating with a fuel tank being arranged at the bottom of the fuel reservoir (1), and a fuel outlet pipe (4) being arranged on the upper cover (2), a fuel filter (5) and a fuel pump (6) being arranged in the fuel reservoir (1), characterized in that: the fuel filter (5) is arranged in the fuel inlet pipe (3) and the fuel pump (6) is arranged in the fuel outlet pipe (4). The oil storage barrel (1) is provided with a siphon chamber by a partition (7), the bottom of the siphon chamber is further provided with a second oil inlet pipe (8), the oil pump (6) is arranged inside the filter (5) and is integrally arranged with the filter (5), the inlet of the lower end of the oil pump (6) penetrates the filter (5) and extends to the outside of the filter (5), the side wall of the filter (5) is provided with an adjusting valve (9) communicated with the inner cavity of the filter (5), the adjusting valve (9) is communicated with the oil outlet pipe (4) on the upper cover (2) through a corrugated pipe (10), the oil storage barrel (1) is further provided with a siphon assembly communicated with the adjusting valve (9), the lower end of the siphon assembly extends into the siphon chamber and is communicated with the second oil inlet pipe (8), the first oil inlet pipe (3) is detachably connected with a second spray pipe (11) communicated with the adjusting valve (9), the second spray pipe (11) and the lower side of the first oil inlet pipe (3) are both provided with an oil inlet (12) for injecting oil into the oil storage barrel (1).

2. The fuel pump for a four-wheel drive vehicle according to claim 1, characterized by: The upper cover (2) is arranged on the upper side of the port of the oil storage barrel (1) through a support rod (13), the support rod (13) is sleeved with a return spring (14) between the oil storage barrel (1) and the upper cover (2), and the upper cover (2) is provided with an electric control assembly (15).

3. The fuel pump for a four-wheel drive vehicle according to claim 2, characterized by: The oil level sensor assembly (16) is arranged on the outside of the oil storage barrel (1) and is electrically connected with the electric control assembly (15).

4. The fuel pump for a four-wheel drive vehicle according to claim 1, characterized by: The filter (5) is sleeved with a support (17) on the outside, the outer periphery of the support (17) is provided with an insertion block (18), the port of the oil storage barrel (1) is provided with an insertion groove (19) matched with the insertion block (18), and the filter (5) is arranged in the oil storage barrel (1) through the support (17).

5. The fuel pump for a four-wheel drive vehicle according to claim 2, characterized by: The lower end of the filter (5) is provided with a filter screen (20) corresponding to the inlet of the oil pump (6), the oil pump (6) is sleeved with a limiting sleeve (21) and a first sealing ring (22) at the outlet of the upper end, and the oil pump (6) is connected with a power line harness (23) connected with the electric control assembly (15).

6. The fuel pump for a four-wheel drive vehicle according to claim 1, characterized by: The adjusting valve (9) is provided with an adjusting valve core (24), the top end and the middle segment position of the adjusting valve core (24) are both sleeved with a second sealing ring (25) between the adjusting valve (9), and the second sealing ring (25) at the middle segment position of the adjusting valve core (24) is sleeved with a check ring (26) on both sides.

7. The fuel pump for a four-wheel drive vehicle according to claim 1, characterized by: The adjusting valve (9) is provided with a pressure relief valve (27), the pressure relief valve (27) is slidably provided with a pressure relief valve core (28), the end of the pressure relief valve core (28) is provided with a reset spring (29) between the pressure relief valve (27), and the pressure relief valve (27) is further provided with a drain port (30) communicated with the inner cavity of the oil storage barrel (1).

8. The fuel pump for a four-wheel drive vehicle according to claim 1, characterized by: The siphon assembly comprises a siphon bracket (31) arranged at a port of the oil storage tank (1) corresponding to a siphon cavity and connected to the side of the regulating valve (9) opposite to the pressure relief valve (27) through a first hose (32), a first injection pipe (33) and a siphon pipe (34) are arranged at the lower side of the siphon bracket (31) and communicate with the siphon bracket (31), the lower ends of the first injection pipe (33) and the siphon pipe (34) extend into the siphon cavity, the lower end of the siphon pipe (34) is inserted into the second oil inlet pipe (8) and communicates with the second oil inlet pipe (8), a second sealing ring (25) is arranged between the siphon pipe (34) and the second oil inlet pipe (8), the first injection pipe (33) generates negative pressure when injecting oil, so that the siphon pipe (34) sucks oil from the second oil inlet pipe (8) and injects the oil into the oil storage tank (1) through the first injection pipe (33).

9. The fuel pump for a four-wheel drive vehicle according to claim 8, characterized by: The second injection pipe (11) communicates with the regulating valve (9) through a second hose (36), the siphon bracket (31) and the first hose (32), buckles (37) are arranged at the two sides of the second injection pipe (11), a clamping block (38) matched with the buckles (37) is arranged on the first oil inlet pipe (3), the second injection pipe (11) is detachably clamped on the first oil inlet pipe (3) through the buckles (37) and the clamping block (38), the second injection pipe (11) injects oil into the first oil inlet pipe (3) to generate negative pressure and increase the oil injection speed of the first oil inlet pipe (3).

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