CN113339169B - Fuel oil filtering system and control method thereof - Google Patents
Fuel oil filtering system and control method thereof Download PDFInfo
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- CN113339169B CN113339169B CN202110709594.3A CN202110709594A CN113339169B CN 113339169 B CN113339169 B CN 113339169B CN 202110709594 A CN202110709594 A CN 202110709594A CN 113339169 B CN113339169 B CN 113339169B
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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
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to the technical field of fuel oil filtration, and discloses a fuel oil filtration system and a control method thereof. The collection unit can acquire and take notes the mileage of vehicle, through whether the mileage of traveling that the comparison acquireed reaches the settlement mileage, can the automatic switch fuel through the precedence order of first filtering component and second filtering component, when first filtering component has not reached change or washing requirement yet, just switch to the second filtering component and carry out the prefiltering, can balance two filtering component's filter effect, make the two be close to the maintenance mileage in step, reduce the change number of times of filtering the inner core, whole filter effect is stable.
Description
Technical Field
The invention relates to the technical field of fuel oil filtration, in particular to a fuel oil filtration system and a control method thereof.
Background
At present, most diesel engines adopt a high-pressure common rail electric injection technology for supplying oil, wherein a high-pressure common rail pump provides ultrahigh-pressure diesel oil, and the diesel oil is injected into a combustion chamber of the diesel engine at regular time and quantity through an electric control oil injector, so that the exhaust emission of vehicles is effectively reduced. The whole set of high-pressure common rail electric injection system has higher cost, in the running process of a vehicle, fuel oil is continuously sucked out from a fuel oil tank and flows through the high-pressure common rail electric injection system, and impurities in the fuel oil can cause the conditions of particle abrasion of a plunger matching part of a high-pressure common rail pump, particle abrasion of a needle valve matching part of an electric control oil injector, particle abrasion of an oil nozzle and the like, so that the atomization effect of the oil injector is poor, the oil injection quantity is increased, further the faults of black smoke emission, insufficient power and the like of an engine are caused, and serious accidents of cylinder pulling and the like of the engine can be caused in serious cases. In order to ensure the normal operation of the engine, a fuel filtering device is usually arranged between a fuel tank and a high-pressure common rail electronic injection system.
A DPF (diesel particulate filter) is installed in an exhaust system of a vehicle to trap particles after combustion of diesel fuel and reduce the content of particulate matter in exhaust gas. When the amount of particulates accumulated in the DPF is excessive, i.e., the carbon load exceeds a certain value, the DPF is automatically and actively regenerated to discharge the accumulated combustion gas of the particulates.
Current fuel filter equipment is after using a period, and the filtering action descends, and the filter effect is not good enough, leads to the granule rapid accumulation in the DPF, and then makes the frequent initiative regeneration of DPF, seriously influences the life of DPF.
Disclosure of Invention
One object of the present invention is to provide a fuel oil filtering system, which can effectively improve the filtering effect, reduce the cleaning and replacing times of the filter element of the filtering assembly, avoid frequent active regeneration of the DPF, and prolong the service life of the DPF.
Another object of the present invention is to provide a control method for a fuel filter system, which can switch the filter oil path by obtaining the driving mileage of the vehicle, and is convenient to operate.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, a fuel filtration system is provided, comprising:
the fuel delivery assembly comprises a fuel tank and a fuel delivery pump, and the inner cavity of the fuel delivery pump is communicated with the fuel tank and used for pumping fuel in the fuel tank;
the fuel injection assembly comprises a booster pump and a fuel injector, and a nozzle of the fuel injector is communicated with an inner cavity of the booster pump so as to inject fuel into a combustion chamber of the engine;
the filter cavity of the first filter assembly, the filter cavity of the second filter assembly, the inner cavity of the oil transfer pump and the inner cavity of the booster pump are communicated;
the acquisition unit is used for recording the driving mileage of the vehicle, and when the driving mileage is less than the set mileage, the fuel output by the fuel delivery pump sequentially passes through the first filtering component and the second filtering component and enters the inner cavity of the booster pump;
and the control unit controls the fuel oil output by the fuel delivery pump to sequentially pass through the second filtering component and the first filtering component and enter the inner cavity of the booster pump when the driving mileage reaches the set mileage.
The fuel oil filtering system provided by the invention preferably further comprises a third filtering assembly, and the fuel oil in the fuel oil tank enters the inner cavity of the fuel delivery pump through a filtering cavity of the third filtering assembly.
The fuel oil filtering system provided by the invention further comprises a first filtering oil pipe and a second filtering oil pipe, the first filtering assembly is arranged on the first filtering oil pipe, the second filtering assembly is arranged on the second filtering oil pipe, a first tee joint is arranged at an oil outlet of the fuel delivery pump, a first outlet of the first tee joint can be communicated with an inner cavity of the booster pump through the first filtering oil pipe and the second filtering oil pipe in sequence, and a second outlet of the first tee joint can be communicated with the inner cavity of the booster pump through the second filtering oil pipe and the first filtering oil pipe in sequence.
As the preferable scheme of the fuel oil filtering system provided by the invention, a second tee joint is arranged at an oil inlet of the booster pump, a first inlet of the second tee joint can be communicated with the first filtering oil pipe, and a second inlet of the second tee joint can be communicated with the second filtering oil pipe.
As the preferred scheme of the fuel oil filtering system provided by the invention, the fuel oil filtering system further comprises a first filtering pipeline and a second filtering pipeline;
the first filtering pipeline comprises a first pipeline first pipe, a first pipeline second pipe and a first pipeline third pipe, the first pipeline first pipe is connected between a first outlet of the first tee joint and the upstream of the first filtering oil pipe, the first pipeline second pipe is connected between the downstream of the first filtering oil pipe and the upstream of the second filtering oil pipe, and the first pipeline third pipe is connected between the downstream of the second filtering oil pipe and a second inlet of the second tee joint;
the second filtering pipeline comprises a first second pipeline pipe, a second pipeline pipe and a third second pipeline pipe, the first second pipeline pipe is connected between the second outlet of the first tee joint and the upstream of the second filtering oil pipe, the second pipeline pipe is connected between the downstream of the second filtering oil pipe and the upstream of the first filtering oil pipe, and the third second pipeline pipe is connected between the downstream of the first filtering oil pipe and the first inlet of the second tee joint.
As a preferable mode of the fuel filter system provided by the invention,
a first three-way valve is arranged at the upstream of the first filtering oil pipe, a first inlet of the first three-way valve is communicated with the first pipeline first pipe, a second inlet of the first three-way valve is communicated with the second pipeline second pipe, and the control unit can control the first inlet of the first three-way valve to be opened and the second inlet of the first three-way valve to be closed or control the first inlet of the first three-way valve to be closed and the second inlet of the first three-way valve to be opened;
a second three-way valve is arranged at the downstream of the first filtering oil pipe, a first outlet of the second three-way valve is communicated with the third pipe of the second pipeline, a second outlet of the second three-way valve is communicated with the second pipe of the first pipeline, and the control unit can control the first outlet of the second three-way valve to be opened and the second outlet of the second three-way valve to be closed or control the first outlet of the second three-way valve to be closed and the second outlet of the second three-way valve to be opened;
a third three-way valve is arranged at the upstream of the second filtering oil pipe, a first inlet of the third three-way valve is communicated with the first pipe of the second pipeline, a second inlet of the third three-way valve is communicated with the second pipe of the first pipeline, and the control unit can control the first inlet of the third three-way valve to be opened and the second inlet of the third three-way valve to be closed or control the first inlet of the third three-way valve to be closed and the second inlet of the third three-way valve to be opened;
a fourth three-way valve is arranged at the downstream of the second filtering oil pipe, a first outlet of the fourth three-way valve is communicated with the first pipeline three pipe, a second outlet of the fourth three-way valve is communicated with the second pipeline two pipe, and the control unit can control the first outlet of the fourth three-way valve to be opened and the second outlet of the fourth three-way valve to be closed or control the first outlet of the fourth three-way valve to be closed and the second outlet of the fourth three-way valve to be opened.
The fuel filtering system further comprises a switch and a detection unit, wherein the control unit is connected with a first contact, a second contact and a third contact, and the switch is initially closed to the first contact;
when the detection unit detects that the driving mileage is less than the set mileage, the control unit controls the switch to be switched to the second contact, so that fuel oil sequentially passes through the first filtering assembly and the second filtering assembly;
when the detection unit detects that the driving mileage reaches the set mileage, the control unit controls the switch to be switched to the third contact, so that fuel oil sequentially passes through the second filtering assembly and the first filtering assembly.
The fuel oil filtering system provided by the invention further comprises an identification unit, and when the identification unit identifies that the first filtering component and the second filtering component are cleaned or replaced, the control unit can control the driving mileage recorded by the acquisition unit to be cleared and control the switch to be reset to the first contact.
The fuel oil filter system provided by the invention further comprises a pressure stabilizing assembly, and the fuel oil output by the booster pump enters a nozzle of the fuel oil injector through a pressure stabilizing cavity of the pressure stabilizing assembly.
In another aspect, there is provided a control method of a fuel filter system, which is controlled by the fuel filter system according to any one of the claims, including the steps of:
acquiring the driving mileage of a vehicle;
and judging whether the driving mileage reaches the set mileage, if so, enabling the fuel output by the fuel delivery pump to sequentially pass through the first filtering component and the second filtering component and enter the inner cavity of the booster pump, and if not, enabling the fuel output by the fuel delivery pump to sequentially pass through the second filtering component and the first filtering component and enter the inner cavity of the booster pump.
The invention has the beneficial effects that:
in the fuel oil filtering system provided by the invention, fuel oil in the fuel oil tank is pumped by the fuel delivery pump and then passes through the fuel oil filtering device consisting of the first filtering component and the second filtering component to filter impurities in the fuel oil, the filtered fuel oil enters the booster pump, and high-pressure fuel oil output by the booster pump is sprayed into a combustion chamber of an engine through the fuel oil injector communicated with the booster pump. The acquisition unit can acquire and record the mileage of vehicle, and when judging that the mileage of traveling who acquires is less than the settlement mileage, the fuel of fuel delivery pump output filters through first filtering component, second filtering component in proper order, gets into the inner chamber of booster pump afterwards, sets for the mileage and is less than certain value of first filtering component maintenance mileage (need change or wash the inner core when reaching the maintenance mileage). Because first filter assembly filters the fuel for the first time, the second filter assembly filters the fuel for the second time, consequently accumulates more impurity granule in the first filter assembly. When the driving mileage reaches the set mileage, the control unit switches the filtering oil path instantly, so that the fuel output by the fuel delivery pump is primarily filtered by the second filtering component with less accumulated impurities and then enters the first filtering component for secondary filtering, namely, when the first filtering component does not reach the requirement of replacement or cleaning, the fuel is switched to the second filtering component for primary filtering, the filtering effects of the two filtering components can be balanced, the two filtering components are synchronously close to the maintenance mileage, the replacement frequency of the filtering inner core is reduced, and the whole filtering effect is stable.
According to the control method of the fuel oil filtering system, the driving mileage of the vehicle is obtained, whether the obtained driving mileage reaches the set mileage or not is compared, the sequence of the fuel oil passing through the first filtering assembly and the second filtering assembly can be automatically switched, so that the overall filtering effect is improved, and the operation is convenient.
Drawings
FIG. 1 is a schematic illustration of a fuel filtration system according to an embodiment of the present invention;
FIG. 2 is a control schematic diagram of a control unit provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of the first filtering circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the operation of a second filtered circuit according to an embodiment of the present invention;
fig. 5 is a flowchart of a method of controlling a fuel filtration system in accordance with an embodiment of the present invention.
In the figure:
1-an oil transportation component; 2-oil injection assembly; 4-a collection unit; 5-a control unit; 20-a switch; 30-an identification unit; 40-lead;
11-a fuel tank; 12-an oil transfer pump; 13-a third filter assembly;
21-a booster pump; 22-fuel injector; 23-a voltage stabilizing component;
31-a first filter assembly; 32-a second filter assembly;
51-a first contact; 52-a second contact; 53-third contact;
61-a first filter oil pipe; 62-a second filter pipe;
71-a first tee; 72-a second tee;
81-first pipeline one pipe; 82-a second first pipeline; 83-first pipeline three-pipe;
91-a second pipeline; 92-second pipeline; 93-third pipe of second pipeline;
101-a first three-way valve; 102-a second three-way valve; 103-a third three-way valve; 104-fourth three-way valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to 2, the present embodiment provides a fuel filter system for filtering foreign substances from fuel introduced into a combustion chamber of an engine. The fuel oil filtering system comprises an oil delivery assembly 1, an oil injection assembly 2, a first filtering assembly 31, a second filtering assembly 32, a collecting unit 4 and a control unit 5.
The oil transportation component 1 comprises a fuel tank 11 and an oil transportation pump 12, and the inner cavity of the oil transportation pump 12 is communicated with the fuel tank 11. The fuel injection assembly 2 comprises a booster pump 21 and a fuel injector 22, and the nozzle of the fuel injector 22 is communicated with the inner cavity of the booster pump 21. The fuel in the fuel tank 11 is pumped by the fuel pump 12 and then passes through the fuel filtering device composed of the first filtering component 31 and the second filtering component 32 to filter impurities in the fuel, the filtered fuel enters the booster pump 21, and the high-pressure fuel output by the booster pump 21 is injected into a combustion chamber of the engine through the fuel injector 22 communicated with the booster pump.
The acquisition unit 4 can acquire and record the mileage of the vehicle. When the obtained driving mileage is judged to be less than the set mileage, the fuel output by the fuel delivery pump 12 is sequentially filtered by the first filter assembly 31 and the second filter assembly 32, and then enters the inner cavity of the booster pump 21. The maintenance mileage is set to a value smaller than the maintenance mileage of the first filter assembly 31 (the inner core needs to be replaced or cleaned when the maintenance mileage is reached). Since the first filter assembly 31 primarily filters the fuel and the second filter assembly 32 secondarily filters the fuel, more foreign particles are accumulated in the first filter assembly 31. When the driving mileage reaches the set mileage, the control unit 5 immediately switches the filtering oil path, so that the fuel output by the fuel delivery pump 12 is primarily filtered by the second filtering component 32 with less accumulated impurities, and then enters the first filtering component 31 for secondary filtering. That is, when first filtering component 31 has not reached the change or when wasing the requirement, just switch to second filtering component 32 and carry out the prefiltering, can balance two filtering component's filter effect, make the two be close to the maintenance mileage in step, reduce the change number of times of filtering the inner core, whole filter effect is stable.
The fuel delivery pump 12 is a negative pressure pump, and the fuel inlet of the fuel delivery pump is a negative pressure pump, so that fuel in the fuel tank 11 can be smoothly pumped. The oil outlet of the oil transfer pump 12 is positive pressure, and can provide certain power for the fuel oil, so that the fuel oil can be smoothly pumped into the first filter assembly 31 or the second filter assembly 32. Optionally, the pressure at the negative pressure end is 0.35-1bar, and the pressure at the positive pressure end is greater than 7bar, so that the output power of the oil transfer pump 12 can be reasonably planned, and the energy consumption is saved.
Optionally, a third filter assembly 13 is arranged between the fuel tank 11 and the fuel delivery pump 12, and a filter cavity of the third filter assembly 13 is respectively communicated with the inner cavities of the fuel tank 11 and the fuel delivery pump 12. The fuel in the fuel tank 11 firstly passes through the filter chamber of the third filter assembly 13 to filter part of impurities and then enters the inner cavity of the fuel delivery pump 12, so that the abrasion to parts in the fuel delivery pump 12 is reduced, and the service life of the fuel delivery pump is prolonged. By arranging the third filtering component 13, the fuel in the fuel tank 11 can enter the fuel injection component 2 only through the third filtering component 13, the first filtering component 31 and the second filtering component 32, that is, the fuel in the combustion chamber of the engine is subjected to three-layer filtering, even if the fuel with poor quality is filled in the fuel tank 11, impurities in the fuel can be fully filtered, precise matching parts in the booster pump 21 and the fuel injector 22 are protected, and faults are reduced.
Optionally, in this embodiment, the third filtering assembly 13 includes a coarse filter, and each of the first filtering assembly 31 and the second filtering assembly 32 includes a fine filter, so as to perform a filtering manner of coarse filtering and fine filtering on the fuel. After the fuel in the fuel tank 11 passes through the third filter assembly 13, larger particles of impurities can be filtered, and the rapid wear of the fine filters of the downstream first filter assembly 31 and the downstream second filter assembly 32 can be avoided. After the fuel passes through the first filtering component 31 and the second filtering component 32, fine particle impurities in the fuel can be fully filtered, and the purity of the fuel entering the combustion chamber is improved.
Optionally, the third filter assembly 13 is capable of filtering impurities above 6 μm. The first filter assembly 31 and the second filter assembly 32 are each capable of filtering 4 μm of impurities. The 4-micron impurities are the main reasons of particle abrasion faults of the booster pump 21 and the fuel injector 22, 4-micron particles in fuel oil can be fully filtered by arranging two stages of 4-micron filtering inner cores, the condition that the number of the 4-micron impurities in a high-pressure common rail electronic injection system exceeds the standard is prevented, and particle abrasion is effectively reduced.
Alternatively, the third filter assembly 13 may comprise one or more strainers and the first and second filter assemblies 31, 32 may each comprise one or more fine filters. The number of fine filters in the first filter assembly 31 and the number of fine filters in the second filter assembly 32 may be the same or different. The number and filtration grade of the coarse filter, the fine filter in the first filter assembly 31 and the fine filter in the second filter assembly 32 can be selected according to the specific design requirements of the vehicle and the engine, and are not particularly limited herein.
Optionally, the set mileage is one half or one fourth of the maintenance mileage of the first filter assembly 31, and when the vehicle mileage reaches the set mileage, the fuel output by the fuel delivery pump 12 automatically switches to pass through the second filter assembly 32 and then pass through the first filter assembly 31, so as to slow down the accumulation rate of the impurity particles in the first filter assembly 31.
It will be appreciated that when the second filter assembly 32 is approaching maintenance mileage, the control unit 5 may again control the fuel output from the fuel delivery pump 12 to automatically switch to first entering the first filter assembly 31 and then entering the second filter assembly 32. That is to say, the sequence of fuel passing through first filtering component 31 and second filtering component 32 can switch many times to make first filtering component 31 and second filtering component 32 reach the maintenance mileage in step, and then wash simultaneously or change, reduce the maintenance number of times, convenience of customers uses.
Referring to fig. 1, optionally, the oil outlet of the oil transfer pump 12 is provided with a first three-way 71. A first outlet of the first tee 71 is connected with a first filtering oil pipe 61, and the first filtering assembly 31 is arranged on the first filtering oil pipe 61. A second outlet of the first tee joint 71 is connected with a second filtering oil pipe 62, and the second filtering assembly 32 is arranged on the second filtering oil pipe 62. Further, the oil inlet of the booster pump 21 is provided with a second tee 72, a first inlet of the second tee 72 can be communicated with the first filter oil pipe 61, and a second inlet of the second tee 72 can be communicated with the second filter oil pipe 62.
When the driving mileage of the vehicle does not reach the set mileage, the fuel oil can pass through the first filter oil pipe 61 and the second filter oil pipe 62 in sequence from the first outlet of the first tee joint 71 and flow into the second inlet of the second tee joint 72, so that the fuel oil enters the inner cavity of the booster pump 21, flows along the path and is continuously sprayed into the combustion chamber of the engine. When the driving mileage of the vehicle reaches the set mileage, the flow path is blocked, and meanwhile, the second outlet of the first tee joint 71 can be communicated with the first inlet of the second tee joint 72 through the second filtering oil pipe 62 and the first filtering oil pipe 61 in sequence, at this time, the fuel is switched to flow in the path, filtered by the second filtering assembly 32, then filtered by the first filtering assembly 31, and then pumped into the fuel injector 22 through the booster pump 21.
Optionally, in this embodiment, in order to adapt to the two paths of fuel filtering, a first filtering pipeline and a second filtering pipeline are further disposed between the fuel delivery assembly 1 and the fuel injection assembly 2. The first filtering pipeline and the second filtering pipeline correspond to one path respectively.
Specifically, referring to fig. 1, the first filtered conduit includes a first conduit one tube 81, a first conduit two tube 82, and a first conduit three tube 83. The first pipe line 81 is connected between the first outlet of the first three-way pipe 71 and the upstream of the first filter oil pipe 61. The first line second pipe 82 is connected between the downstream of the first filter oil pipe 61 and the upstream of the second filter oil pipe 62. A first conduit third pipe 83 is connected between the downstream of the second filter oil pipe 62 and the second inlet of the second tee 72. When the driving mileage of the vehicle is less than the set mileage, the fuel output by the output pump is diverted from the first outlet of the first tee joint 71 to the first filtering pipeline, flows to the first filtering oil pipe 61 through the first pipeline first pipe 81 for primary fine filtering, flows to the second filtering oil pipe 62 through the first pipeline second pipe 82 for secondary fine filtering, and finally flows into the second inlet of the second tee joint 72 through the first pipeline third pipe 83.
Similarly, the second filtered line includes a second line one tube 91, a second line two tube 92, and a second line three tube 93. A second first pipe 91 is connected between the second outlet of the first tee 71 and the upstream of the second filter pipe 62, a second pipe 92 is connected between the downstream of the second filter pipe 62 and the upstream of the first filter pipe 61, and a second third pipe 93 is connected between the downstream of the first filter pipe 61 and the first inlet of the second tee 72. When the driving mileage of the vehicle reaches the set mileage, the fuel output by the output pump is shunted to the second filtering pipeline from the second outlet of the first tee joint 71, flows to the second filtering oil pipe 62 through the first pipe 91 of the second pipeline for primary fine filtering, flows to the first filtering oil pipe 61 through the second pipe 92 for secondary fine filtering, and finally flows into the first inlet of the second tee joint 72 through the third pipe 93 of the second pipeline.
Referring to fig. 1, the first pipeline pipe 81, the second pipeline pipe 91, the first pipeline pipe 83 and the second pipeline pipe 93 are all U-shaped pipes. The first pipeline first pipe 81 and the second pipeline third pipe 93 are respectively located at both sides of the first filter oil pipe 61, and the second pipeline first pipe 91 and the first pipeline third pipe 83 are respectively located at both sides of the second filter oil pipe 62. The openings of the first pipe 81 and the second pipe 91 are opposite to each other, and the openings of the second pipe 93 and the first pipe 83 are opposite to each other. The arrangement mode enables the four pipe sections to be symmetrical up and down and left and right, can reasonably utilize the space in the vehicle, and is reasonable in layout. The first and second pipe lines 82 and 92 are both bent pipes to change the flow direction of the fuel, thereby achieving diagonal connection between the downstream of the first filter oil pipe 61 and the upstream of the second filter oil pipe 62, and diagonal connection between the downstream of the second filter oil pipe 62 and the upstream of the first filter oil pipe 61.
Alternatively, referring to fig. 1, the control unit 5 controls the switching of the fuel from the first filtered line to the second filtered line by means of a valve. Specifically, a first three-way valve 101 is provided upstream of the first filter pipe 61. The first inlet of the first three-way valve 101 is communicated with the first pipeline first pipe 81, and the second inlet of the first three-way valve 101 is communicated with the second pipeline second pipe 92. The control unit 5 can control the first inlet of the first three-way valve 101 to be opened and the second inlet of the first three-way valve 101 to be closed, or control the first inlet of the first three-way valve 101 to be closed and the second inlet of the first three-way valve 101 to be opened. That is, the upstream of the first filter oil pipe 61 is always communicated with the first three-way valve 101, and the first inlet and the second inlet of the first three-way valve 101 are alternatively opened.
Optionally, a second three-way valve 102 is provided downstream of the first filter pipe 61. The first outlet of the second three-way valve 102 is communicated with the second pipeline three pipe 93, and the second outlet of the second three-way valve 102 is communicated with the first pipeline two pipe 82. The control unit 5 can control the first outlet of the second three-way valve 102 to be open and the second outlet of the second three-way valve 102 to be closed, or the first outlet of the second three-way valve 102 to be closed and the second outlet of the second three-way valve 102 to be open. That is, the downstream of the first filter oil pipe 61 is always communicated with the second three-way valve 102, and the first outlet and the second outlet of the second three-way valve 102 are alternatively opened.
Optionally, a third three-way valve 103 is provided upstream of the second filter line 62. The first inlet of the third three-way valve 103 is communicated with the first pipe 91 of the second pipeline, and the second inlet of the third three-way valve 103 is communicated with the second pipe 82 of the first pipeline. The control unit 5 can control the first inlet of the third three-way valve 103 to be opened and the second inlet of the third three-way valve 103 to be closed, or control the first inlet of the third three-way valve 103 to be closed and the second inlet of the third three-way valve 103 to be opened. That is, the upstream of the second filter pipe 62 is always communicated with the third three-way valve 103, and the first inlet and the second inlet of the third three-way valve 103 are alternatively opened.
Optionally, a fourth three-way valve 104 is provided downstream of the second filter line 62. A first outlet of the fourth three-way valve 104 is communicated with the first three-way pipe 83, and a second outlet of the fourth three-way valve 104 is communicated with the second two-way pipe 92. The control unit 5 can control the first outlet of the fourth three-way valve 104 to be open and the second outlet of the fourth three-way valve 104 to be closed, or the first outlet of the fourth three-way valve 104 to be closed and the second outlet of the fourth three-way valve 104 to be open. That is, the downstream of the second filter pipe 62 is always communicated with the fourth three-way valve 104, and the first outlet and the second outlet of the fourth three-way valve 104 are alternatively opened.
Specifically, referring to FIG. 3, FIG. 3 is a schematic illustration of the flow of fuel through the first filtered line. When the driving mileage of the vehicle does not reach the set mileage, the control unit 5 controls the first inlet of the first three-way valve 101 to be opened and the second inlet to be closed, the first outlet of the second three-way valve 102 to be closed and the second outlet to be opened, the first inlet of the third three-way valve 103 to be closed and the second inlet to be opened, and controls the first outlet of the fourth three-way valve 104 to be opened and the second outlet to be closed, therefore, the fuel output by the output pump sequentially passes through the first outlet of the first tee joint 71, the first pipeline first pipe 81, the first inlet of the first tee joint valve 101 and the first filtering oil pipe 61 for preliminary fine filtering, then, the fuel oil passes through the first second pipeline pipe 82, the second inlet of the third three-way valve 103 and the second filter oil pipe 62 in sequence from the second outlet of the second three-way valve 102 for secondary fine filtration, and finally flows from the first outlet of the fourth three-way valve 104 to the second inlet of the second three-way valve 72 through the first third pipeline pipe 83.
Referring to FIG. 4, FIG. 4 is a schematic view of the flow of fuel through the second filtered line. When the driving mileage of the vehicle reaches the set mileage, the control unit 5 controls the four three-way valves to be all reversed so as to conduct the second filtering pipeline. At this time, the fuel output by the output pump sequentially passes through the second outlet of the first three-way valve 71, the first pipe 91 of the second pipeline, the first inlet of the third three-way valve 103, and the second oil filtering pipe 62 for primary fine filtering, then the fuel sequentially passes through the second pipe 92 of the second pipeline, the second inlet of the first three-way valve 101, and the first oil filtering pipe 61 from the second outlet of the fourth three-way valve 104 for secondary fine filtering, and finally flows from the first outlet of the second three-way valve 102 to the first inlet of the second three-way valve 72 through the third pipe 93 of the second pipeline.
The first filtering pipeline and the second filtering pipeline can be switched conveniently by arranging the three-way valves, and only the control unit 5 is required to control the opening directions of the four three-way valves. Further, referring to fig. 2, the mileage information acquired by the acquisition unit 4 enables the control unit 5 to control the opening and closing of the inlets or outlets of the first three-way valve 101, the second three-way valve 102, the third three-way valve 103, and the fourth three-way valve 104, respectively, so as to realize the switching of the filtering pipelines.
Preferably, the four three-way valves are all three-way electromagnetic valves, so that control precision and flexibility can be guaranteed, and automatic control is easy to realize.
Referring to fig. 3 and 4, after the first filtering line and the second filtering line are switched with each other, the flowing direction of the fuel in the first filtering fuel pipe 61 and the second filtering fuel pipe 62 is not changed. In this embodiment, through the above arrangement, no matter whether the fuel passes through the first filter assembly 31 or the second filter assembly 32 first, the flow direction of the fuel in the first filter oil pipe 61 and the second filter oil pipe 62 is not changed, and the flow direction of the fuel in the filter cavity of the first filter assembly 31 and the filter cavity of the second filter assembly 32 is also not changed. After the filtering pipeline is switched, the fuel in the first filtering oil pipe 61 and the second filtering oil pipe 62 continuously flows along the original direction without reversing, and the energy loss is avoided. If the fuel flows in a reverse direction after the filtering pipeline is switched, the fuel newly rushing into the first filtering oil pipe 61 and the second filtering oil pipe 62 needs to overcome the power of the fuel flowing in the original direction and push the fuel to flow in the opposite direction, so that the collision of the fuel can cause pipeline vibration and cause certain impact on parts on a pipeline, further the pipeline connection part is loosened, the fuel is leaked seriously, and great potential safety hazards exist. The arrangement mode in the embodiment can avoid the situation, and the safety performance of the vehicle is improved.
Referring to fig. 1, the fuel filter system further includes a switch 20 and a detection unit. The control unit 5 is connected with a first contact 51, a second contact 52 and a third contact 53. After a new vehicle is loaded, the fuel oil filtering system is started, the switch 20 is initially closed to the first contact 51, and at this time, the control unit 5 receives a signal and controls the acquisition unit 4 to start acquiring and recording the driving mileage of the vehicle. The driving mileage of the new vehicle is shorter (generally only after the test driving stage), and is far less than the set mileage. Meanwhile, the detection unit can detect that the driving mileage is less than the set mileage, and send a signal to the control unit 5, and the control unit 5 receives the signal and controls the switch 20 to switch to the second contact 52 to conduct the first filtering pipeline. The fuel is filtered by the first filter assembly 31 and the second filter assembly 32 in sequence and then supplies oil to the fuel injection assembly 2.
Along with the gradual increase of the driving mileage of the vehicle, the detection unit sends a signal to the control unit 5 again until the set mileage is reached, and the control unit 5 automatically switches to the second filtering pipeline for oil supply after receiving the signal. The fuel is filtered by the second filter assembly 32 and the first filter assembly 31 to supply the fuel to the fuel injection assembly 2.
Referring to fig. 2, optionally, the control unit 5 is further connected with an identification unit 30. When the first filter assembly 31 and the second filter assembly 32 reach the maintenance mileage, the filter cores of the first filter assembly 31 and the second filter assembly 32 need to be replaced or cleaned. After the cleaning or replacement is completed, the recognition unit 30 can recognize this information and send a maintenance signal to the control unit 5. The control unit 5 receives the maintenance signal, then controls the driving mileage recorded by the acquisition unit 4 to be cleared, controls the switch 20 to be reset to the first contact 51, and repeats the steps until the filtering inner cores of the first filtering component 31 and the second filtering component 32 are replaced and maintained next time.
Referring to fig. 1, optionally, a pressure stabilizing assembly 23 is further disposed between the boost pump 21 and the fuel injector 22, and fuel output by the boost pump 21 enters a nozzle of the fuel injector 22 through a pressure stabilizing cavity of the pressure stabilizing assembly 23. The pressure stabilizing component 23 can inhibit pressure fluctuation generated by high-pressure fuel provided by the booster pump 21 and oil injection of the oil injector 22, ensure stable pressure of the high-pressure common-rail electric injection system and ensure normal operation of the whole fuel oil filtering system.
Further, the control unit 5 is electrically connected with the first three-way valve 101, the second three-way valve 102, the third three-way valve 103 and the fourth three-way valve 104 through corresponding leads 40, and the control unit 5 is electrically connected with the acquisition unit 4 and the identification unit 30 through corresponding leads 40 to realize automatic control.
Referring to fig. 5, the present embodiment further provides a control method of a fuel filter system, which uses the fuel filter system as described above to perform control to filter impurities in fuel entering a combustion chamber of an engine, and includes the following specific control steps:
acquiring the driving mileage of a vehicle;
and judging whether the driving mileage reaches the set mileage, if so, enabling the fuel oil output by the fuel delivery pump 12 to sequentially pass through the first filtering component 31 and the second filtering component 32 and enter the inner cavity of the booster pump 21, and if not, enabling the fuel oil output by the fuel delivery pump 12 to sequentially pass through the second filtering component 32 and the first filtering component 31 and enter the inner cavity of the booster pump 21.
According to the control method of the fuel oil filtering system provided by the embodiment, the driving mileage of the vehicle is obtained, and whether the obtained driving mileage reaches the set mileage is compared, the sequence of the fuel oil passing through the first filtering component 31 and the second filtering component 32 can be automatically switched, so that the first filtering component 31 and the second filtering component 32 are synchronously close to the maintenance mileage, the times of replacing the filtering inner core are reduced, the integral filtering effect is improved, automatic control can be realized, and the operation is convenient.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A fuel filter system, comprising:
the fuel delivery assembly (1) comprises a fuel tank (11) and a fuel delivery pump (12), wherein the inner cavity of the fuel delivery pump (12) is communicated with the fuel tank (11) and is used for pumping fuel in the fuel tank (11);
the fuel injection assembly (2) comprises a booster pump (21) and a fuel injector (22), and a nozzle of the fuel injector (22) is communicated with an inner cavity of the booster pump (21) so as to inject fuel into a combustion chamber of the engine;
the filter cavity of the first filter assembly (31), the filter cavity of the second filter assembly (32), the inner cavity of the oil transfer pump (12) and the inner cavity of the booster pump (21) are communicated;
the acquisition unit (4) is used for recording the driving mileage of the vehicle, and when the driving mileage is less than the set mileage, the fuel output by the fuel delivery pump (12) sequentially passes through the first filtering component (31) and the second filtering component (32) and enters the inner cavity of the booster pump (21);
and the control unit (5) is used for controlling the fuel output by the fuel delivery pump (12) to sequentially pass through the second filtering component (32) and the first filtering component (31) and enter an inner cavity of the booster pump (21) when the driving mileage reaches the set mileage.
2. A fuel filter system according to claim 1, further comprising a third filter assembly (13), wherein fuel in the fuel tank (11) enters the inner chamber of the fuel delivery pump (12) through a filter chamber of the third filter assembly (13).
3. The fuel filtering system according to claim 1, further comprising a first filtering oil pipe (61) and a second filtering oil pipe (62), wherein the first filtering assembly (31) is disposed on the first filtering oil pipe (61), the second filtering assembly (32) is disposed on the second filtering oil pipe (62), the oil outlet of the fuel delivery pump (12) is provided with a first tee joint (71), a first outlet of the first tee joint (71) can be communicated with the inner cavity of the booster pump (21) sequentially through the first filtering oil pipe (61) and the second filtering oil pipe (62), and a second outlet of the first tee joint (71) can be communicated with the inner cavity of the booster pump (21) sequentially through the second filtering oil pipe (62) and the first filtering oil pipe (61).
4. A fuel filter system according to claim 3, wherein the oil inlet of the booster pump (21) is provided with a second tee joint (72), a first inlet of the second tee joint (72) being communicable with the first filter line (61), and a second inlet of the second tee joint (72) being communicable with the second filter line (62).
5. A fuel filtration system according to claim 4, further comprising a first filtered line and a second filtered line;
the first filtering pipeline comprises a first pipeline first pipe (81), a first pipeline second pipe (82) and a first pipeline third pipe (83), the first pipeline first pipe (81) is connected between a first outlet of the first tee joint (71) and an upstream of the first filtering oil pipe (61), the first pipeline second pipe (82) is connected between a downstream of the first filtering oil pipe (61) and an upstream of the second filtering oil pipe (62), and the first pipeline third pipe (83) is connected between a downstream of the second filtering oil pipe (62) and a second inlet of the second tee joint (72);
the second filtering pipeline comprises a first second pipeline pipe (91), a second pipeline pipe (92) and a third second pipeline pipe (93), the first second pipeline pipe (91) is connected between a second outlet of the first tee joint (71) and an upstream of the second filtering oil pipe (62), the second pipeline pipe (92) is connected between a downstream of the second filtering oil pipe (62) and an upstream of the first filtering oil pipe (61), and the third second pipeline pipe (93) is connected between a downstream of the first filtering oil pipe (61) and a first inlet of the second tee joint (72).
6. A fuel filtration system as set forth in claim 5,
a first three-way valve (101) is arranged on the upstream of the first filtering oil pipe (61), a first inlet of the first three-way valve (101) is communicated with the first pipeline first pipe (81), a second inlet of the first three-way valve (101) is communicated with the second pipeline second pipe (92), and the control unit (5) can control the first inlet of the first three-way valve (101) to be opened and the second inlet of the first three-way valve (101) to be closed or control the first inlet of the first three-way valve (101) to be closed and the second inlet of the first three-way valve (101) to be opened;
a second three-way valve (102) is arranged at the downstream of the first filtering oil pipe (61), a first outlet of the second three-way valve (102) is communicated with the second pipeline third pipe (93), a second outlet of the second three-way valve (102) is communicated with the first pipeline second pipe (82), and the control unit (5) can control the first outlet of the second three-way valve (102) to be opened and the second outlet of the second three-way valve (102) to be closed or control the first outlet of the second three-way valve (102) to be closed and the second outlet of the second three-way valve (102) to be opened;
a third three-way valve (103) is arranged on the upstream of the second filtering oil pipe (62), a first inlet of the third three-way valve (103) is communicated with the first pipe (91) of the second pipeline, a second inlet of the third three-way valve (103) is communicated with the second pipe (82) of the first pipeline, and the control unit (5) can control the first inlet of the third three-way valve (103) to be opened and the second inlet of the third three-way valve (103) to be closed, or control the first inlet of the third three-way valve (103) to be closed and the second inlet of the third three-way valve (103) to be opened;
a fourth three-way valve (104) is arranged at the downstream of the second filtering oil pipe (62), a first outlet of the fourth three-way valve (104) is communicated with the first pipeline third pipe (83), a second outlet of the fourth three-way valve (104) is communicated with the second pipeline second pipe (92), and the control unit (5) can control the first outlet of the fourth three-way valve (104) to be opened and the second outlet of the fourth three-way valve (104) to be closed, or control the first outlet of the fourth three-way valve (104) to be closed and the second outlet of the fourth three-way valve (104) to be opened.
7. A fuel filter system according to claim 1, further comprising a switch (20) and a detection unit, wherein the control unit (5) is connected to a first contact (51), a second contact (52) and a third contact (53), and wherein the switch (20) is initially closed to the first contact (51);
when the detection unit detects that the driving mileage is less than the set mileage, the control unit (5) controls the switch (20) to switch to the second contact (52) so as to enable fuel to sequentially pass through the first filter assembly (31) and the second filter assembly (32);
when the detection unit detects that the driving mileage reaches the set mileage, the control unit (5) controls the switch (20) to be switched to the third contact (53), so that fuel sequentially passes through the second filter assembly (32) and the first filter assembly (31).
8. The fuel filter system according to claim 7, further comprising an identification unit (30), wherein when the identification unit (30) identifies that the first filter assembly (31) and the second filter assembly (32) are cleaned or replaced, the control unit (5) can control the mileage recorded by the acquisition unit (4) to be cleared and control the switch (20) to be reset to the first contact (51).
9. A fuel filter system according to any one of claims 1 to 8, further including a pressure stabilising assembly (23), fuel delivered from the boost pump (21) passing through a pressure stabilising chamber of the pressure stabilising assembly (23) and into the injector (22) nozzle.
10. A control method of a fuel filter system, which is controlled by the fuel filter system according to any one of claims 1 to 9, comprising the steps of:
acquiring the driving mileage of a vehicle;
and judging whether the driving mileage reaches the set mileage, if so, enabling the fuel output by the fuel delivery pump (12) to sequentially pass through the first filtering component (31) and the second filtering component (32) and enter the inner cavity of the booster pump (21), and if not, enabling the fuel output by the fuel delivery pump (12) to sequentially pass through the second filtering component (32) and the first filtering component (31) and enter the inner cavity of the booster pump (21).
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| CN202110709594.3A CN113339169B (en) | 2021-06-25 | 2021-06-25 | Fuel oil filtering system and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1399067A (en) * | 2001-07-21 | 2003-02-26 | 曼内斯曼Vdo股份公司 | Fuel conveyer for engine |
| US20170045005A9 (en) * | 2008-08-29 | 2017-02-16 | Delphi International Operations Luxembourg, S.A.R.L. | Fuel pressure regulation system |
| CN103670849B (en) * | 2013-11-20 | 2016-09-07 | 潍柴动力股份有限公司 | A kind of engine and fuel filter thereof |
| CN204984674U (en) * | 2015-10-08 | 2016-01-20 | 广州南车铁路机车车辆装备有限公司 | Pair fuel oil filter |
| CN106800269B (en) * | 2015-11-26 | 2019-02-15 | 中国科学院沈阳自动化研究所 | A kind of UAV navigation automatic fuelling device and method |
| KR101776430B1 (en) * | 2015-12-14 | 2017-09-07 | 현대자동차주식회사 | The next generation fuel pump integrated diesel fuel filter |
| CN205400957U (en) * | 2016-01-26 | 2016-07-27 | 康明斯过滤Ip公司 | Multistage fuel filtration system |
| CN106150801B (en) * | 2016-06-30 | 2019-10-01 | 华为技术有限公司 | A kind of communication unit oil machine filtration system |
| CN106194529A (en) * | 2016-08-31 | 2016-12-07 | 湖北赛恩斯科技股份有限公司 | A kind of automatic pump oil fuel filter assembly |
| CN207554241U (en) * | 2017-10-30 | 2018-06-29 | 潍柴动力股份有限公司 | The anti-reverse oil piping system of fuel filter, fuel filter and engine |
| CN207813914U (en) * | 2018-02-02 | 2018-09-04 | 上海锆卓船舶设计有限公司 | A kind of purification fuel oil pump unit of ships and light boats fuel loading system |
| CN111927662A (en) * | 2020-08-11 | 2020-11-13 | 一汽解放汽车有限公司 | Diesel oil filtering system and automobile |
| CN213235288U (en) * | 2020-09-22 | 2021-05-18 | 中国人民解放军空军预警学院雷达士官学校 | Oil pressure maintaining system of low-pressure oil way of diesel engine |
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