CN114251208A - Fuel supply system and fuel supply method - Google Patents

Fuel supply system and fuel supply method Download PDF

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Publication number
CN114251208A
CN114251208A CN202111332057.8A CN202111332057A CN114251208A CN 114251208 A CN114251208 A CN 114251208A CN 202111332057 A CN202111332057 A CN 202111332057A CN 114251208 A CN114251208 A CN 114251208A
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China
Prior art keywords
fuel
oil
liquid
diesel engine
gas separator
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CN202111332057.8A
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Chinese (zh)
Inventor
陈钦法
刘威
何广凯
崔相义
张文强
刘志军
周威
史光程
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Xuzhou XCMG Excavator Machinery Co Ltd
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Xuzhou XCMG Excavator Machinery Co Ltd
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Application filed by Xuzhou XCMG Excavator Machinery Co Ltd filed Critical Xuzhou XCMG Excavator Machinery Co Ltd
Priority to CN202111332057.8A priority Critical patent/CN114251208A/en
Publication of CN114251208A publication Critical patent/CN114251208A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
    • F02M33/02—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel
    • F02M33/08—Other apparatus for treating combustion-air, fuel or fuel-air mixture for collecting and returning condensed fuel returning to the fuel tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/54—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by air purging means

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a fuel supply system, which comprises a fuel filtering module, an electric fuel pump, a fuel cooler, a diesel engine assembly and a liquid-gas separator, wherein an oil outlet pipeline of a fuel tank is connected with the fuel filtering module, the fuel filtering module is connected with the electric fuel pump, the electric fuel pump is connected with a first inlet pipe of the liquid-gas separator, an air return pipeline of the fuel tank is connected with a first outlet pipe of the liquid-gas separator, an oil inlet pipeline of the diesel engine assembly is connected with a second outlet pipe of the liquid-gas separator, an oil outlet pipeline of the diesel engine assembly is connected with the fuel cooler, and the fuel cooler is connected with a second inlet pipe of the liquid-gas separator.

Description

Fuel supply system and fuel supply method
Technical Field
The invention relates to the field of diesel engine oil supply systems, in particular to a fuel oil supply system and a fuel oil supply method.
Background
In order to ensure the normal operation of the diesel engine, the diesel engine needs to ensure enough fuel supply to avoid insufficient fuel supply when the fuel injection quantity of the engine changes suddenly, and in order to ensure sufficient fuel supply, the actually supplied fuel is more than tens of times of the actually consumed fuel of the diesel engine, and the fuel flows through the engine, is compressed by a high-pressure pump, and the temperature rises to cause the temperature of the whole fuel tank to rise.
In order to ensure the cleanliness and the water content of fuel, a fuel filtering module is required to be arranged in a fuel supply system to filter and separate water and impurities, and the filtering module is required to have enough filtering area and precision and small enough resistance.
The invention discloses an automobile engine fuel supply system disclosed in 2015 03-04, which belongs to the technical field of automobiles, and belongs to the prior art, and the application number of the Chinese patent is CN 201410508807.6. The fuel supply system for the automobile engine comprises: the device comprises a microprocessor, an oil pressure sensor, a pulse generating device and an oil transfer pump; the oil pressure sensor is arranged on an oil outlet pipeline between the oil transfer pump and the microprocessor; one end of the pulse generating device is connected with the microprocessor, and the other end of the pulse generating device is connected with the oil transfer pump; the microprocessor controls the duty ratio of the pulse generating device according to the pressure difference between the fuel pressure value in the oil outlet pipeline of the fuel delivery pump acquired by the oil pressure sensor and a preset target fuel pressure value, and adjusts the rotating speed of the fuel delivery pump, so that the amount of fuel pumped by the fuel delivery pump is adjusted.
In the prior art, chinese invention patent with application number CN201510771680.1 discloses a fuel supply amount control method in 2018, month 01 and 19, which comprises the following steps: acquiring a fuel pressure flow value of an oil return pipeline; comparing the fuel pressure flow value with a fuel data fuzzy control interval under each working condition and dividing gears; and calculating the oil supply pressure and the oil supply flow according to the gears, and sending the oil supply pressure and the oil supply flow to the electric fuel pump so as to adjust the rotating speed of a fuel pump motor, thereby solving the problem of overlarge noise of the electric fuel pump.
The defects of the prior art are as follows: (1) only a small part of the fuel pumped by the low-pressure fuel supply pump is consumed by the diesel engine, and the flow of the fuel flowing through the filtering module is large, so that each filter needs to have enough volume and filtering area, and the overlarge resistance is avoided; (2) the fuel supply flow is generally positively correlated with the rotating speed of the diesel engine, and certain pulse pressure exists, so that the filtering performance is not influenced; (3) the fuel constantly flows through the diesel engine and returns the oil tank, and the fuel that is heated can lead to the oil tank temperature constantly to rise, and higher requirement is put forward to the material of oil tank, and high temperature also changes simultaneously and leads to diesel oil rotten.
Disclosure of Invention
The invention aims to provide a fuel supply system and a fuel supply method aiming at the problems in the prior art, which greatly reduce the fuel supply amount compared with the prior art and also improve the redundancy of a fuel filtering module.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a fuel oil feeding system, includes oil tank, fuel oil filter module, electronic fuel pump, fuel oil cooler and diesel engine assembly, still includes liquid gas separator, the oil outlet pipeline of oil tank connects fuel oil filter module, fuel oil filter module connects electronic fuel pump, electronic fuel pump connects liquid gas separator's first pipe that advances, the return air pipe connection of oil tank liquid gas separator's first exit tube, the oil inlet pipeline of diesel engine assembly connects liquid gas separator's second exit tube, the oil outlet pipeline of diesel engine assembly connects fuel oil cooler, fuel oil cooler connects liquid gas separator's second advances the pipe.
The working process of the scheme is that fuel in the fuel tank is filtered by the fuel filtering module and then is conveyed into the liquid-gas separator by the electric fuel pump, the part of the fuel is subjected to gas-liquid separation in the liquid-gas separator and then flows to the diesel engine assembly from the second outlet pipe, the diesel engine assembly discharges the part of the fuel which is not consumed into the liquid-gas separator from the second inlet pipe, the fuel conveyed by the electric fuel pump and the return oil of the diesel engine assembly are converged in the liquid-gas separator to perform gas-liquid separation, air in the fuel and a small amount of redundant fuel return to the fuel tank, and the separated oil flows out from the second outlet pipe and flows into the diesel engine assembly again.
The fuel oil filter module has the advantages that firstly, the electric fuel pump can be set as a constant delivery pump to supply fuel oil to the diesel engine assembly in a constant amount, and fuel oil which is not consumed by the diesel engine assembly flows to the diesel engine assembly again after liquid-gas separation, so that the flow of the fuel oil flowing through the fuel oil filter module is only required to be larger than the actual fuel oil consumption of the diesel engine assembly, the fuel oil supply amount is greatly reduced compared with the prior art, and the redundancy of the fuel oil filter module is also improved.
Secondly, the lower fuel flow flows through the fuel filtering module, the filtering effect is better compared with that of the fuel filtering module with larger flow, the filtering area and the assembly volume of the fuel filtering module can be properly reduced, the maintenance period is prolonged, and the cost is reduced;
thirdly, the front resistance of the electric fuel pump can be detected, so that the state of the filter element can be detected more accurately, and the replacement requirement can be identified;
fourthly, when the electric fuel pump is newly installed and the filter element is replaced, air entering the system can be exhausted more quickly, and the electric fuel pump is convenient and quick;
fifthly, the return oil of the diesel engine assembly is supplied to the diesel engine assembly again, the temperature of the oil tank can be prevented from rising, the high temperature resistance requirement on the material of the oil tank can be reduced, and therefore the cost of the diesel oil tank is reduced.
Further, the liquid-gas separator comprises a cylindrical inner cavity, the first inlet pipe and the second inlet pipe are both tangentially connected with the cylindrical inner cavity, the first inlet pipe and the second inlet pipe are axially and symmetrically arranged relative to the middle axis of the cylindrical inner cavity, and the first inlet pipe and the second inlet pipe are both connected to the upper part of the side wall of the cylindrical inner cavity; the first outlet pipe is positioned at the top of the liquid-gas separator, and the second outlet pipe is positioned at the bottom of the liquid-gas separator.
Through making first advancing pipe and second advance the pipe all with cylinder inner chamber tangent connection, make the liquid-gas mixture along the inner wall collision after entering into the cylinder inner chamber, gaseous and liquid quick separation because the centrifugal force that liquid received is gaseous than big, and liquid assembles downwards along cylinder inner chamber inner wall, discharges from the second exit tube, and gaseous upwards assembles, discharges from first exit tube.
Furthermore, the upper end and the lower end of the cylindrical inner cavity are both provided with conical inner cavities, the first outlet pipe is connected with the conical inner cavity at the upper end of the cylindrical inner cavity, and the second outlet pipe is connected with the conical inner cavity at the lower end of the cylindrical inner cavity. The upper end and the lower end of the cylindrical inner cavity are provided with the conical inner cavities, so that separated gas and liquid can be conveniently and quickly gathered to the upper end part and the lower end part of the liquid-gas separator.
Furthermore, the fuel oil filtering module comprises an oil-water separator, a fuel oil rough filter and a fuel oil fine filter which are sequentially connected in the fuel oil flow direction, the oil-water separator is connected with an oil outlet pipeline of the oil tank, and the fuel oil fine filter is connected with the electric fuel pump.
Furthermore, the diesel engine assembly comprises a low-pressure oil supply pump, a high-pressure pump and an oil injector which are sequentially connected in the fuel flow direction, the low-pressure oil supply pump is connected with the second outlet pipe of the liquid-gas separator, and the oil injector is connected with the fuel cooler.
Further, the high-pressure pump is provided with a pressure relief oil way connected with the fuel oil cooler. The pressure relief oil way is used for limiting the oil pressure of fuel sprayed by the oil sprayer and avoiding overlarge oil pressure.
A supply method of a fuel supply system, wherein the electric fuel pump quantifies and supplies fuel to the diesel engine assembly through the liquid-gas separator; and the fuel oil which is not consumed by the diesel engine assembly flows into the diesel engine assembly again after passing through the liquid-gas separator.
The fuel oil which is not consumed by the diesel engine assembly flows to the diesel engine assembly again after passing through the liquid-gas separator, so that the fuel oil flow passing through the fuel oil filtering module is only required to be larger than the actual fuel oil consumption of the diesel engine assembly, the fuel oil supply amount is greatly reduced compared with the fuel oil filtering module in the prior art, and the redundancy of the fuel oil filtering module is also improved.
The liquid-gas separator separates a liquid-gas mixture entering from the first inlet pipe and the second inlet pipe, so that separated gas and redundant fuel oil flow back to the oil tank from the first outlet pipe, and separated oil flows back to the diesel engine assembly from the second outlet pipe.
And a liquid-gas separator is arranged, so that the fuel oil conveyed by the electric fuel oil pump and the return oil of the diesel engine assembly are converged in the liquid-gas separator, and gas-liquid separation is carried out.
Setting the fuel flow passing through the fuel filtering module to be Q1The fuel flow into the diesel engine assembly is Q2The flow of the fuel flowing out of the diesel engine assembly is Q3And Q is1＝a(Q2-Q3) Wherein the value of a is 1.2-1.8.
In the prior art, the oil supply flow is generally more than 10 times of the actual oil consumption of the diesel engine, and compared with the prior art, the scheme greatly reduces the oil supply flow.
And the fuel which is not consumed by the diesel engine assembly flows into a second inlet pipe of the liquid-gas separator after being cooled by the fuel cooler. The damage of the high-temperature oil to the liquid-gas separator is avoided, and the adverse effect of the high-temperature oil on the performance of the diesel engine is avoided.
Compared with the prior art, the invention has the beneficial effects that:
1. the electric fuel pump can be set as a constant delivery pump to supply fuel oil to the diesel engine assembly in a constant quantity, and fuel oil which is not consumed by the diesel engine assembly flows to the diesel engine assembly again after liquid-gas separation, so that the flow of the fuel oil flowing through the fuel oil filtering module is only required to be larger than the actual fuel oil consumption of the diesel engine assembly, the fuel oil supply amount is greatly reduced compared with the prior art, and the redundancy of the fuel oil filtering module is also improved;
2. the lower fuel flow flows through the fuel filtering module, the filtering effect is better compared with that of the larger flow, the filtering area and the assembly volume of the fuel filtering module can be properly reduced, the maintenance period is prolonged, and the cost is reduced;
3. the resistance in front of the electric fuel pump can be detected, so that the state of the filter element can be accurately detected, and the replacement requirement can be identified;
4. when the electric fuel pump is newly installed and the filter element is replaced, air entering the system can be exhausted more quickly, and the electric fuel pump is convenient and quick;
5. the return oil of the diesel engine assembly is supplied to the diesel engine assembly again, so that the temperature of the oil tank can be prevented from rising, the high-temperature resistant requirement on the material of the oil tank can be reduced, and the cost of the diesel oil tank is reduced.
Drawings
FIG. 1 is a schematic diagram of a fuel delivery system of the present invention;
FIG. 2 is a schematic diagram of the prior art of the present invention;
FIG. 3 is a perspective view of the liquid gas separator of the present invention;
FIG. 4 is a front view of the liquid vapor separator of the present invention;
FIG. 5 is a front cross-sectional view of the liquid vapor separator of the present invention;
FIG. 6 is a top cross sectional view of the liquid vapor separator of the present invention;
in the figure: 1. a fuel oil filtering module; 2. an electric fuel pump; 3. a fuel cooler; 4. a diesel engine assembly; 5. a liquid-gas separator; 501. a first inlet pipe; 502. a first outlet pipe; 503. a second outlet pipe; 504. a second inlet pipe; 6. an oil tank; 7. a cylindrical inner cavity; 8. a conical cavity.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "horizontal", "vertical", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 6, a fuel supply system includes a fuel tank 6, a fuel filter module 1, an electric fuel pump 2, a fuel cooler 3, a diesel engine assembly 4, and a liquid-gas separator 5, wherein an oil outlet pipeline of the fuel tank 6 is connected to the fuel filter module 1, the fuel filter module 1 is connected to the electric fuel pump 2, the electric fuel pump 2 is connected to a first inlet pipe 501 of the liquid-gas separator 5, an air return pipeline of the fuel tank is connected to a first outlet pipe 502 of the liquid-gas separator, an oil inlet pipeline of the diesel engine assembly 4 is connected to a second outlet pipe 503 of the liquid-gas separator 5, an oil outlet pipeline of the diesel engine assembly 4 is connected to the fuel cooler, and the fuel cooler is connected to a second inlet pipe 504 of the liquid-gas separator.
The working process of the scheme is that fuel in the fuel tank 6 is filtered by the fuel filtering module 1 and then is conveyed to the liquid-gas separator 5 by the electric fuel pump 2, the part of the fuel is subjected to gas-liquid separation in the liquid-gas separator 5 and then flows to the diesel engine assembly 4 from the second outlet pipe, the diesel engine assembly 4 discharges the part of the fuel which is not consumed into the liquid-gas separator 5 from the second inlet pipe, the fuel conveyed by the electric fuel pump 2 and the return oil of the diesel engine assembly 4 are converged in the liquid-gas separator 5 for gas-liquid separation, air in the fuel and a small amount of redundant fuel return to the fuel tank 6, and the separated fuel flows out from the second outlet pipe and flows into the diesel engine assembly 4 again.
The scheme has the advantages that firstly, the electric fuel pump 2 can be set as a constant delivery pump to supply fuel oil to the diesel engine assembly 4 in a constant quantity, and fuel oil which is not consumed by the diesel engine assembly 4 flows to the diesel engine assembly 4 again after liquid-gas separation, so that the flow of the fuel oil flowing through the fuel oil filtering module 1 is only required to be larger than the actual fuel oil consumption of the diesel engine assembly 4, the fuel oil supply amount is greatly reduced compared with the prior art, and the redundancy of the fuel oil filtering module is improved;
secondly, the lower fuel flow flows through the fuel filtering module 1, the filtering effect is better compared with that of the fuel filtering module 1 with larger flow, the filtering area and the assembly volume of the fuel filtering module 1 can be properly reduced, the maintenance period is prolonged, and the cost is reduced;
thirdly, the front resistance of the electric fuel pump 2 can be detected, so that the state of a filter element can be detected more accurately, and the replacement requirement can be identified;
fourthly, when the electric fuel pump 2 is newly installed and the filter element is replaced, air entering the system can be exhausted more quickly, and the electric fuel pump is convenient and quick;
fifthly, the return oil of the diesel engine assembly 4 is supplied to the diesel engine assembly 4 again, the temperature of the oil tank 6 can be prevented from rising, the high temperature resistant requirement on the material of the oil tank 6 can be reduced, and therefore the cost of the diesel oil tank 6 is reduced.
Further, the liquid-gas separator 5 comprises a cylindrical inner cavity 7, the first inlet pipe 501 and the second inlet pipe 504 are both connected with the cylindrical inner cavity 7 in a tangent manner, the first inlet pipe 501 and the second inlet pipe 504 are axially and symmetrically arranged relative to the center of the cylindrical inner cavity 7, and the first inlet pipe 501 and the second inlet pipe 504 are both connected to the upper portion of the side wall of the cylindrical inner cavity 7; the first outlet pipe 502 is positioned at the top of the liquid-gas separator 5, and the second outlet pipe 503 is positioned at the bottom of the liquid-gas separator 5.
Through making first advancing pipe 501 and second advance pipe 504 and all be tangent with cylinder inner chamber 7 and be connected, make the liquid-gas mixture along the inner wall collision after entering into cylinder inner chamber 7, gaseous and liquid quick separation, because the centrifugal force that liquid received is bigger than gaseous, liquid assembles downwards along cylinder inner chamber 7 inner wall, discharges from second exit tube 503, and gaseous upwards assembles, discharges from first exit tube 502.
Further, the upper end and the lower end of the cylindrical inner cavity 7 are both provided with a conical inner cavity 8, the first outlet pipe 502 is connected with the conical inner cavity 8 at the upper end of the cylindrical inner cavity 7, and the second outlet pipe 503 is connected with the conical inner cavity 8 at the lower end of the cylindrical inner cavity 7. The upper end and the lower end of the cylindrical inner cavity 7 are respectively provided with the conical inner cavity 8, so that separated gas and liquid can be conveniently and quickly gathered to the upper end part and the lower end part of the liquid-gas separator 5.
Further, the fuel oil filtering module 1 comprises an oil-water separator, a fuel oil coarse filter and a fuel oil fine filter which are sequentially connected in a fuel oil flow direction, the oil-water separator is connected with an oil outlet pipeline of the oil tank 6, and the fuel oil fine filter is connected with the electric fuel pump 2.
Further, the diesel engine assembly 4 comprises a low-pressure oil supply pump, a high-pressure pump and an oil injector which are sequentially connected in the fuel flow direction, the low-pressure oil supply pump is connected with the second outlet pipe 503 of the liquid-gas separator 5, and the oil injector is connected with the fuel cooler 3.
Further, the high-pressure pump is provided with a pressure relief oil way connected with the fuel cooler 3. The pressure relief oil way is used for limiting the oil pressure of fuel sprayed by the oil sprayer and avoiding overlarge oil pressure.
Example 2
As shown in fig. 1, in a supply method of a fuel supply system, the electric fuel pump 2 supplies fuel quantitatively to the diesel engine assembly 4 through the liquid-gas separator 5; the fuel which is not consumed by the diesel engine assembly 4 flows into the diesel engine assembly 4 again after passing through the liquid-gas separator 5.
The fuel that is not consumed by the diesel engine assembly 4 flows to the diesel engine assembly 4 again after passing through the liquid-gas separator 5, so that the fuel flow passing through the fuel filtering module 1 only needs to be larger than the actual fuel consumption of the diesel engine assembly 4, the fuel supply amount is greatly reduced compared with the prior art, and the redundancy of the fuel filtering module is improved.
The liquid-gas separator 5 separates the liquid-gas mixture entering from the first inlet pipe 501 and the second inlet pipe 504, so that the separated gas and the redundant fuel oil flow back to the oil tank 6 from the first outlet pipe 502, and the separated oil flows back to the diesel engine assembly 4 from the second outlet pipe 503.
And a liquid-gas separator 5 is arranged, so that fuel oil conveyed by the electric fuel pump 2 and return oil of the diesel engine assembly 4 are converged in the liquid-gas separator 5, and gas-liquid separation is carried out.
The fuel flow passing through the fuel filtering module 1 is set as Q1The flow rate of the fuel flowing into the diesel engine assembly 4 is Q2The flow of the fuel flowing out of the diesel engine assembly 4 is Q3And Q is1＝a(Q2-Q3) Wherein the value of a is 1.2-1.8.
In the prior art, the oil supply flow is generally more than 10 times of the actual oil consumption of the diesel engine, and compared with the prior art, the scheme greatly reduces the oil supply flow.
The fuel which is not consumed by the diesel engine assembly 4 flows into the second inlet pipe 504 of the liquid-gas separator 5 after being cooled by the fuel cooler 3. The damage of the high-temperature oil to the liquid-gas separator 5 and the adverse effect of the high-temperature oil on the performance of the diesel engine are avoided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a fuel oil feeding system, includes oil tank, fuel oil filter module, electronic fuel pump, fuel oil cooler and diesel engine assembly, its characterized in that still includes liquid-gas separator, the oil outlet pipeline of oil tank connects fuel oil filter module, fuel oil filter module connects electronic fuel pump, electronic fuel pump connects liquid-gas separator's first pipe that advances, the return air pipe connection of oil tank liquid-gas separator's first exit tube, diesel engine assembly's the pipeline connection that advances liquid-gas separator's second exit tube, diesel engine assembly's oil outlet pipeline connection the fuel oil cooler, the fuel oil cooler is connected liquid-gas separator's second advances the pipe.
2. A fuel supply system according to claim 1, wherein the liquid-gas separator includes a cylindrical inner cavity, the first inlet pipe and the second inlet pipe are both tangentially connected to the cylindrical inner cavity, the first inlet pipe and the second inlet pipe are symmetrically arranged with respect to a central axis of the cylindrical inner cavity, and the first inlet pipe and the second inlet pipe are both connected to an upper portion of a side wall of the cylindrical inner cavity; the first outlet pipe is arranged at the top of the liquid-gas separator, and the second outlet pipe is arranged at the bottom of the liquid-gas separator.
3. A fuel supply system as set forth in claim 2 wherein said cylindrical interior has conical interior at both upper and lower ends thereof, said first outlet tube being connected to said conical interior at the upper end of said cylindrical interior and said second outlet tube being connected to said conical interior at the lower end of said cylindrical interior.
4. The fuel supply system of claim 1, wherein the fuel filter module comprises an oil-water separator, a fuel coarse filter and a fuel fine filter which are connected in sequence in the fuel flow direction, the oil-water separator is connected with an oil outlet pipeline of the fuel tank, and the fuel fine filter is connected with the electric fuel pump.
5. The fuel supply system according to claim 1, wherein the diesel engine assembly comprises a low pressure fuel supply pump, a high pressure pump and a fuel injector which are connected in sequence in the fuel flow direction, the low pressure fuel supply pump is connected with the second outlet pipe of the liquid-gas separator, and the fuel injector is connected with the fuel cooler.
6. A fuel supply system as claimed in claim 5, characterized in that said high-pressure pump is provided with a pressure relief circuit connected to said fuel cooler.
7. The method of claim 1, wherein said electric fuel pump meters fuel to said diesel assembly through said accumulator; and the fuel oil which is not consumed by the diesel engine assembly flows into the diesel engine assembly again after passing through the liquid-gas separator.
8. The method as claimed in claim 7, wherein the liquid-gas separator separates the liquid-gas mixture entering from the first inlet pipe and the second inlet pipe, so that the separated gas and the excess fuel flow back to the oil tank from the first outlet pipe, and the separated oil flows back to the diesel engine assembly from the second outlet pipe.
9. The method according to claim 8, wherein the fuel flow rate through the fuel filter module is set to Q1The fuel flow into the diesel engine assembly is Q2The flow of the fuel flowing out of the diesel engine assembly is Q3And Q is1＝a(Q2-Q3) Wherein the value of a is 1.2-1.8.
10. The method of claim 9, wherein the fuel not consumed by the diesel engine assembly is cooled by the fuel cooler and then flows into the second inlet pipe of the liquid-gas separator.
CN202111332057.8A 2021-11-11 2021-11-11 Fuel supply system and fuel supply method Pending CN114251208A (en)

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Application Number Priority Date Filing Date Title
CN202111332057.8A CN114251208A (en) 2021-11-11 2021-11-11 Fuel supply system and fuel supply method

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Application Number Priority Date Filing Date Title
CN202111332057.8A CN114251208A (en) 2021-11-11 2021-11-11 Fuel supply system and fuel supply method

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JPH08193550A (en) * 1995-01-17 1996-07-30 Toyota Motor Corp Gas-liquid mixer of diesel engine
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CN102914105A (en) * 2012-10-18 2013-02-06 青岛海信日立空调系统有限公司 Oil separator
CN104141575A (en) * 2013-05-07 2014-11-12 浙江福爱电子有限公司 Vapour-liquid separation device and electronic liquid spray unit containing vapour-liquid separation device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836848Y2 (en) * 1978-07-27 1983-08-19 三菱重工業株式会社 Diesel engine fuel oil mixing tank with outer ring tank
JPS55119954A (en) * 1979-03-09 1980-09-16 Toyota Motor Corp Evaporated-fuel separating apparatus
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CN102914105A (en) * 2012-10-18 2013-02-06 青岛海信日立空调系统有限公司 Oil separator
CN104141575A (en) * 2013-05-07 2014-11-12 浙江福爱电子有限公司 Vapour-liquid separation device and electronic liquid spray unit containing vapour-liquid separation device

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