Diesel engine oil supply system

Abstract

The utility model discloses a diesel engine oil supply system, which belongs to the technical field of diesel vehicle oil supply and comprises an oil tank body, a filter assembly is mounted on one side of the oil tank body, and an oil-gas separation device is mounted on one side of the filter assembly. While the oil supply function of a diesel vehicle is guaranteed, the structure replaces a double-pump structure, one pump is reduced compared with the double-pump structure, oil supply and exhaust are conducted at the same time under the working state of a single pump by means of the difference of the structures, it is guaranteed that no gas exists in fuel oil combusted by an engine, and the service life of the engine is prolonged. Oil-gas mixed oil inside and outside a filter element is extracted when an electric pump works, the electric pump discharges the mixed oil into an oil-gas separation oil supply channel, an injection pipe generates high-pressure injection, oil-gas separation is achieved, gas is discharged into an engine oil return channel from the upper portion, and the flow of the mixed oil-gas is controlled through an exhaust valve. Fuel oil sinks to the bottom under gravity to enter the auxiliary oil supply channel, and the flow can be controlled through the oil supply valve before entering the auxiliary oil supply channel.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel vehicle fuel supply, and more specifically, to a diesel engine fuel supply system. Background Art

[0002] Diesel engines have the advantages of large torque and good economic performance. The working process of diesel engines has many similarities with that of gasoline engines, and each working cycle also experiences four strokes: intake, compression, power, and exhaust.

[0003] The mainstream fuel supply structure of existing diesel vehicles is that the fuel pump works for 3 minutes to discharge gas into the engine; the fuel supply structure of double-pump diesel vehicles, although solving the gas problem, increases the usage cost due to the double pumps; the fuel supply structure of double-core diesel vehicles has the exhaust filter element prone to clogging. Currently, there is a lack of a diesel vehicle fuel supply structure that can reduce costs while achieving the functions of double pumps or double cores, and also needs to ensure the effect of fuel savings. Summary of the Utility Model

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a diesel engine fuel supply system. Fuel reaches the filter assembly from the fuel tank, is filtered through the filter element body, and the clean fuel enters the filter base oil outlet through the main fuel supply channel under the suction of the engine to supply the engine; a small part of the fuel enters the electric pump through the exhaust inlets on the inner and outer sides of the filter element, and the electric pump pumps the fuel into the oil-gas separation device through the electric pump fuel supply channel. The fuel generates high pressure under the action of the electric pump in the oil-gas separation injection pipe through the oil-gas separation device fuel supply channel. The high pressure causes the fuel to be sprayed into the exhaust cavity from the high-pressure injection port to separate the oil from the gas. The gas and fuel in the exhaust cavity are stratified under the action of gravity. The upper-layer gas returns to the fuel tank through the exhaust outlet of the oil-gas separation seat and mixes with the engine return oil, and the fuel at the bottom of the exhaust cavity enters the main fuel supply channel of the filter base through the auxiliary engine fuel supply channel and is supplied to the engine together with the main fuel supply.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A diesel engine fuel supply system includes a filter assembly. An oil-gas separation device is installed on one side of the filter assembly. The filter inlet on one side of the filter assembly is connected to the fuel tank, and the engine main fuel supply channel on the other side of the filter assembly is connected to the engine.

[0009] The filter element body is installed inside the filter assembly. A filter element external exhaust inlet and a filter element internal exhaust inlet are formed inside the filter assembly and are connected to the inlet of the electric pump. The filter assembly is connected to the engine through the main engine fuel supply channel.

[0010] The surface of the oil-gas separation device is connected to the outlet end of the electric pump. An oil-gas separation injection pipe is connected through the oil-gas separation structure fuel supply channel. There are several high-pressure injection ports at the end of the oil-gas separation injection pipe.

[0011] An exhaust outlet is installed at the top of the oil-gas separation device. There is an exhaust valve at the connection between the exhaust outlet and the engine oil return.

[0012] Preferably, the inlet end of the filter assembly is connected to the fuel tank through the filter inlet channel.

[0013] Preferably, a flow valve is installed on the surface of the auxiliary engine fuel supply channel.

[0014] Preferably, the auxiliary engine fuel supply channel is connected to the main engine fuel supply channel of the filter assembly.

[0015] Preferably, the main engine fuel supply channel is connected to the engine fuel supply.

[0016] Preferably, the inlet end of the oil-gas separation device is connected to the outlet of the electric pump inside the filter assembly. The lower end is connected to the main engine fuel supply channel of the filter assembly through the auxiliary engine fuel supply channel; the upper end is connected to the engine oil return pipe through the exhaust outlet.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present utility model are as follows:

[0019] (1) In this solution, the fuel reaches the filter assembly from the fuel tank body and is filtered by the filter element body. The clean fuel, under the suction of the engine, enters the filter base outlet through the main fuel supply channel and is supplied to the engine; a small part of the fuel enters the electric pump through the exhaust inlets inside and outside the filter element. The electric pump pumps the fuel into the oil-gas separation device through the electric pump fuel supply channel. The fuel is in the oil-gas separation injection pipe through the oil-gas separation device fuel supply channel. Due to the reduction of the aperture at the outlet end, high pressure is generated under the action of the electric pump. The high pressure causes the fuel to be sprayed into the exhaust cavity from the high-pressure injection ports, separating the oil from the gas. The gas and fuel in the exhaust cavity are stratified under the action of gravity. The upper gas is mixed with the engine oil return through the exhaust outlet of the oil-gas separation seat and returns to the fuel tank. The fuel at the bottom of the exhaust cavity enters the main fuel supply channel of the filter base through the auxiliary engine fuel supply channel and is supplied to the engine together with the main fuel supply.

[0020] (2) While ensuring the fuel supply function of the diesel vehicle, the present innovation uses the structure of this application to replace the double-pump structure. Compared with the double-pump structure, one pump is reduced. By utilizing the differences in the structure of this application, fuel supply and exhaust can be carried out simultaneously under the working state of a single pump, ensuring that the fuel burned by the engine is gas-free. When the electric pump works, it extracts the oil-gas mixed liquid inside and outside the filter element. The electric pump discharges the mixed liquid into the oil-gas separation fuel supply channel and generates high-pressure injection in the injection pipe to separate the oil and gas. The gas is discharged into the engine oil return channel at the upper part. The flow rate of the mixed oil and gas is controlled by the exhaust valve. The fuel sinks to the bottom by gravity and enters the auxiliary fuel supply channel. The flow rate can be controlled by the fuel supply valve before entering the auxiliary fuel supply channel. Brief Description of the Drawings

[0021] Figure 1 Structural Schematic Diagram of the Oil-Gas Separation Device of the Present Utility Model

[0022] Figure 2 Stereo Structural Schematic Diagram of the Present Utility Model;

[0023] Figure 3 Overall Front View Structural Schematic Diagram of the Present Utility Model;

[0024] Figure 4 Structural Schematic Diagram of the Oil-Gas Separation Flow Direction of the Present Utility Model;

[0025] Figure 5 Structural Schematic Diagram of the Engine Oil Flow Direction of the Present Utility Model.

[0026] Explanation of the Reference Numerals in the Drawings:

[0027] 1. Filter Assembly; 2. Oil-Gas Separation Device; 3. Filter Element Body; 4. Exhaust Inlet outside the Filter Element; 5. Exhaust Inlet inside the Filter Element; 6. Main Engine Fuel Supply Channel; 7. Auxiliary Engine Fuel Supply Channel; 8. Oil-Gas Separation Injection Pipe; 9. Filter Inlet Channel; 10. Engine Oil Return Pipe Channel; 11. Exhaust Outlet; 12. Flow Valve; 13. Electric Pump; 14. Oil-Gas Separation Structure Fuel Supply Channel; 15. High-Pressure Injection Port; 16. Exhaust Valve; 17. Fuel Tank; 18. Engine. Detailed Description of the Preferred Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to Figures 1-5, a diesel engine fuel supply system, including a filter assembly 1, on one side of the filter assembly 1, an oil-gas separation device 2 is installed. The filter inlet of one side of the filter assembly 1 is connected to a fuel tank 17, and the engine main fuel supply channel 6 on the other side of the filter assembly 1 is connected to an engine 18;

[0030] Inside the filter assembly 1, a filter element body 3 is installed. Inside the filter assembly 1, a filter element outer exhaust inlet 4 and a filter element inner exhaust inlet 5 are provided and are connected to the inlet of an electric pump 13. The filter assembly 1 is conductively connected to the engine 18 through the engine main fuel supply channel 6;

[0031] The surface of the oil-gas separation device 2 is conductively connected to the outlet end of the electric pump 13. Through an oil-gas separation structure fuel supply channel 14, it is conductively connected to an oil-gas separation injection pipe 8. At the end of the oil-gas separation injection pipe 8, there are several high-pressure injection ports 15;

[0032] On the top of the oil-gas separation device 2, an exhaust outlet 11 is installed. At the connection between the exhaust outlet 11 and the engine oil return, there is an exhaust valve 16.

[0033] The inlet end of the filter assembly 1 is conductively connected to the fuel tank 17 through a filter inlet channel 9. A flow valve 12 is installed on the surface of an auxiliary engine fuel supply channel 7. The engine main fuel supply channel 6 is connected to an auxiliary engine fuel supply channel 7. The engine main fuel supply channel 6 is fuel supply-connected to the engine 18. The inlet end of the oil-gas separation device 2 is connected to the outlet of the electric pump 13 inside the filter assembly 1. The lower end is connected to the engine main fuel supply channel 6 of the filter assembly 1 through the auxiliary engine fuel supply channel 7; the upper end is connected to the engine oil return pipe channel 10 through the exhaust outlet 11.

[0034] It should be noted that the fuel reaches the filter assembly 1 from the fuel tank 17 and is filtered by the filter element body 3. The clean fuel, under the suction of the engine, enters the filter seat outlet through the main fuel supply channel and supplies the engine; a small part of the fuel enters the electric pump 13 through the exhaust inlets inside and outside the filter element. The electric pump 13 pumps the fuel into the oil-gas separation device 2 through the electric pump fuel supply channel. The fuel is in the oil-gas separation injection pipe through the oil-gas separation device fuel supply channel. Due to the reduction of the aperture at the outlet end, high pressure is generated under the action of the electric pump 13. The high pressure causes the fuel to be sprayed into the exhaust cavity from the high-pressure injection ports 15, separating the oil from the gas. The gas and fuel in the exhaust cavity are stratified under the action of gravity. The upper gas is mixed with the engine oil return through the exhaust outlet of the oil-gas separation seat and returns to the fuel tank. The fuel at the bottom of the exhaust cavity enters the filter seat main fuel supply channel through the auxiliary engine fuel supply channel and supplies the engine together with the main fuel supply.

[0035] Implementation Case 1:

[0036] Fuel reaches the filter assembly 1 from the fuel tank 17. After being filtered by the filter element body 3, the clean fuel enters the filter base oil outlet under the suction force of the engine and is supplied to the engine. A small portion of the fuel enters the electric pump 13 through the exhaust inlets inside and outside the filter element. The electric pump 13 pumps the fuel into the oil-gas separation device 2 through the electric pump oil supply channel. The fuel passes through the oil-gas separation device oil supply channel in the oil-gas separation injection pipe. Due to the reduction of the aperture at the oil outlet end, high pressure is generated under the action of the electric pump 13. The high pressure causes the fuel to be sprayed into the exhaust cavity from the high-pressure injection port 15, separating the oil from the gas. The gas and fuel in the exhaust cavity are stratified under the action of gravity. The upper-layer gas returns to the fuel tank after being mixed with the engine return oil through the oil-gas separation base exhaust outlet 11. The fuel at the bottom of the exhaust cavity enters the filter base main oil supply channel 6 through the auxiliary engine oil supply channel 7 and is supplied to the engine together with the main oil supply (the electric pump 13 includes but is not limited to continuous operation and intermittent operation; the control valve 12 between the oil-gas separation base oil supply inlet and outlet can adjust the oil supply flow rate; there are several injection small holes, and the inside of the oil-gas separation pipe is under high pressure. The whole (including the oil-gas separation device) or the separate oil-gas separation device is within the scope of patent protection).

[0037] Embodiment 2:

[0038] The fuel in the fuel tank 17 enters the filter through a pipeline. The filter filters impurities and moisture from the fuel. The filtered fuel enters the oil-gas separation device 2. The oil and gas in the oil-gas separation device 2 are separated under the action of gravity. The electric pump 13 extracts the gas at the top of the oil-gas separation device 2 and discharges it back to the fuel tank 17. The gas-free and clean fuel in the oil-gas separation device 2 enters the engine 18 for combustion under the action of the engine gear pump.

[0039] What is different about this solution from the previous one is that the filter and the oil-gas separation device 2 work separately. The clean fuel from the filter is first supplied to the oil-gas separation device 2, and after the oil-gas separation device 2, it is supplied to the engine 18.

[0040] The above is only the preferred specific embodiment of the present utility model; however, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its improved concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present utility model.

Claims

1. A diesel engine fuel supply system, comprising a filter assembly (1), an auxiliary engine fuel supply passage (7), an electric pump (13) and an oil-gas separation structure fuel supply passage (14), characterized in that: An oil-gas separation device (2) is installed on one side of the filter assembly (1); a filter oil inlet on one side of the filter assembly (1) is connected to an oil tank (17); and an engine main oil supply channel (6) on the other side of the filter assembly (1) is connected to an engine (18); A filter element body (3) is installed inside the filter assembly (1), and an external exhaust inlet (4) and an internal exhaust inlet (5) of the filter element are provided inside the filter assembly (1) and are connected to an oil inlet of an electric pump (13). The filter assembly (1) is connected to an engine (18) through a main oil supply channel (6) of the engine; The surface of the oil-gas separation device (2) is conductively connected to the oil outlet end of the electric pump (13), the oil-gas separation structure oil supply channel (14) is conductively connected to the oil-gas separation injection pipe (8), and the end of the oil-gas separation injection pipe (8) has a plurality of high-pressure injection ports (15); An exhaust outlet (11) is installed on the top of the oil-gas separation device (2), and an exhaust valve (16) is provided at the connection between the exhaust outlet (11) and the engine oil return.

2. A diesel engine fuel supply system according to claim 1, characterized in that: The oil inlet end of the filter assembly (1) is connected to the oil tank (17) via a filter oil inlet passage (9).

3. A diesel engine fuel supply system according to claim 1, characterized in that: A flow valve (12) is installed on the surface of the auxiliary engine oil supply passage (7).

4. A diesel engine fuel supply system according to claim 1, characterized in that: The main engine oil supply passage (6) is connected to an auxiliary engine oil supply passage (7).

5. A diesel engine fuel supply system according to claim 1, characterized in that: The engine main oil supply passage (6) is connected to the engine (18) oil supply.

6. A diesel engine fuel supply system according to claim 1, characterized in that: The oil inlet end of the oil-gas separation device (2) is connected to the oil outlet of the electric pump (13) inside the filter assembly (1), the lower end is connected to the engine main oil supply channel (6) of the filter assembly (1) through the auxiliary engine oil supply channel (7), and the upper end is connected to the engine oil return pipe channel (10) through the exhaust outlet (11).

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