CN111608831A - Intelligent fuel prefilter and control method thereof - Google Patents
Intelligent fuel prefilter and control method thereof Download PDFInfo
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- CN111608831A CN111608831A CN202010515766.9A CN202010515766A CN111608831A CN 111608831 A CN111608831 A CN 111608831A CN 202010515766 A CN202010515766 A CN 202010515766A CN 111608831 A CN111608831 A CN 111608831A
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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
- F02M37/36—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 with bypass means
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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
- F02M37/24—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
- F02M37/26—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 with water detection means
- F02M37/28—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 with water detection means with means activated by the presence of water, e.g. alarms or means for automatic drainage
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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
- F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating means
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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
- F02M37/34—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 by the filter structure, e.g. honeycomb, mesh or fibrous
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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
- F02M37/40—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 with means for detection of clogging
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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
- F02M37/54—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 Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an intelligent fuel prefilter and a control method thereof.A filter element is arranged in a shell, an oil inlet and an oil outlet are arranged on the shell, a one-way valve and an electric pump are arranged between the oil inlet and a dirty oil side in parallel, the oil inlet end of the electric pump is communicated with the oil inlet, and the oil outlet end of the electric pump is communicated with the dirty oil side; a bypass valve is arranged between the dirty oil side and the oil outlet; the oil inlet is communicated with a first pressure sensor, and the oil outlet is communicated with a second pressure sensor; the electric pump, the bypass valve, the first pressure sensor and the second pressure sensor are connected to the controller through corresponding lines. When the filter element is blocked and the fuel flow is reduced, the controller controls the electric pump and the bypass valve to be opened to perform flow compensation, so that the stable operation of an oil supply system is ensured, the normal starting and operation of an engine are ensured, a vehicle can keep normal running, the replacement period of the filter element is prolonged, the maintenance period of the fuel prefilter is prolonged, and the maintenance cost is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle fuel prefilters, in particular to an intelligent fuel prefilter and a control method thereof.
Background
The fuel prefilter is arranged in an engine fuel supply system and is used for filtering impurities, water and other pollutants in fuel and inputting the filtered fuel into the fuel delivery pump and the fuel injector, so that the problems of excessive wear or blockage of important parts such as the fuel delivery pump and the fuel injector are avoided, and the normal work of an engine is ensured. As the service time of the fuel prefilter increases, the filtered impurities in the filter element of the fuel prefilter can be accumulated continuously, and the accumulated impurities can block the filter layer, so that the flow of fuel is influenced; along with the continuous increase of the impurities accumulated in the filter element, the blockage of the filter layer is more and more serious, the flow of fuel oil can be continuously reduced, the condition of insufficient fuel supply is caused, the stable operation of a fuel supply system is influenced, the engine cannot be normally started and operated, and the normal operation of a vehicle is further influenced. In order to ensure the stable operation of an engine oil supply system, the conventional fuel prefilter needs to replace a filter element when the filter element is blocked and the flow rate is reduced to cause insufficient oil supply, and the filter element is short in replacement period, namely the service life of the fuel prefilter is short, the maintenance period is short, and the maintenance cost is high.
Disclosure of Invention
The applicant aims at the defects that when the filter element of the conventional fuel prefilter is blocked, the filter element needs to be replaced, the replacement period of the filter element is short, the maintenance period of the fuel prefilter is short, the maintenance cost is high and the like, and provides the intelligent fuel prefilter with a reasonable structure and the control method thereof, so that the replacement period of the filter element is prolonged, the maintenance period of the fuel prefilter is prolonged, and the maintenance cost is reduced.
The technical scheme adopted by the invention is as follows:
an intelligent fuel prefilter is characterized in that a filter element is arranged in a shell to form a dirty oil side positioned outside the filter element and a clean oil side positioned in the center of the filter element, an oil inlet and an oil outlet are formed in the shell, a check valve and an electric pump are arranged between the oil inlet and the dirty oil side in parallel, the oil inlet end of the electric pump is communicated with the oil inlet, and the oil outlet end of the electric pump is communicated with the dirty oil side; a bypass valve is arranged between the dirty oil side and the oil outlet; the oil inlet is communicated with a first pressure sensor, and the oil outlet is communicated with a second pressure sensor; the electric pump, the bypass valve, the first pressure sensor and the second pressure sensor are connected to the controller through corresponding lines; the controller controls the opening or closing of the electric pump and the bypass valve through operation according to pressure signals fed back by the first pressure sensor and the second pressure sensor.
As a further improvement of the above technical solution:
the oil outlet is also communicated with a temperature sensor, and the temperature sensor is connected to the controller through a corresponding line; and the controller controls the opening or closing of the electric pump and the bypass valve according to the oil temperature signal fed back by the temperature sensor.
According to the invention, the oil pressure of the oil inlet and the oil outlet is detected in real time through the pressure sensor, the oil temperature of the oil outlet is detected in real time through the temperature sensor, and a signal is fed back to the controller, when the filter element is blocked and the fuel flow is reduced, the controller controls the electric pump and the bypass valve to be opened, flow compensation is carried out through the electric pump and the bypass valve, the stable operation of an oil supply system is ensured, the normal starting and operation of an engine are ensured, a vehicle can keep normal running, the filter element does not need to be replaced immediately, the replacement period of the filter element is prolonged, the service life of the fuel prefilter is further prolonged, the maintenance period of the fuel prefilter is prolonged, and the maintenance cost. According to the invention, the controller controls the electric pump, the drain valve, the bypass valve and the heater to be opened or closed, so that the intelligent control of the fuel prefilter is realized, and the operation is simpler and more convenient.
The periphery of the oil inlet end of the electric pump is sleeved with a filter screen.
The filter screen is sleeved on the periphery of the oil inlet end of the electric pump, impurities, water and other pollutants in fuel oil are intercepted and filtered and then enter the oil inlet end, the situations of electric pump clamping stagnation, rusting and the like are avoided, the normal operation of the electric pump is ensured, and the service life of the electric pump is prolonged.
The lower part of the filter element in the shell is provided with a water collecting cavity, a heater is arranged in the water collecting cavity, a temperature sensor is integrated on the heater, the heater and the temperature sensor are connected to a controller, and the controller controls the heater to be turned on or turned off according to an oil temperature signal fed back by the temperature sensor.
The shell is provided with a water drain valve corresponding to the water collecting cavity, the water collecting cavity is internally provided with a high water level sensor and a low water level sensor, the water drain valve, the high water level sensor and the low water level sensor are connected to the controller, and the controller controls the opening or closing of the water drain valve according to water level signals fed back by the high water level sensor and the low water level sensor.
The controller intelligently controls the heater to be turned on or off, so that the vehicle can be quickly started and run at low temperature. The controller controls the opening or closing of the water drain valve through water level signals of the high water level sensor and the low water level sensor, so that the intelligent control water drainage function is realized, and the normal operation of the engine is ensured.
The oil outlet end of the electric pump is communicated with the dirty oil side through a first interface and a second interface; the bypass valve is arranged on the second joint, one end of the second joint is communicated with the dirty oil side through a third interface, the other end of the second joint is connected to the first joint through a pipeline, and the first joint is communicated with the oil outlet through a fifth interface.
The central lines of the first connector and the second connector are parallel to each other and are perpendicular to the central line of the oil inlet; the center lines of the third connector, the fourth connector and the fifth connector are parallel to each other and are parallel to the center line of the oil inlet.
The center lines of the first connector and the second connector are parallel to each other and are perpendicular to the center line of the oil inlet; the center lines of the third port, the fourth port and the fifth port are parallel to each other and are parallel to the center line of the oil inlet; the fuel prefilter has a more compact overall structure and low requirements on installation space.
A control method of an intelligent fuel prefilter is applied to the intelligent fuel prefilter and comprises the following steps,
detect oil pressure P of oil inlet1Oil pressure P of oil outlet2The difference Δ P between the two is compared with a set value Δ P0And Δ P1Make a comparison, Δ P0Less than Δ P1；
If Δ P is less than Δ P0The electric pump is electrified to pump oil and exhaust, and is closed after the set time is reached;
when Δ P is greater than or equal to Δ P1The electric pump is continuously electrified to operate, and a filter element blockage alarm signal is output;
the oil pressure P1And a set value P0Making a comparison if P1Less than P0The bypass valve is closed; if P1Greater than or equal to P0The bypass valve is opened.
As a further improvement of the above technical solution:
detect oil temperature T of oil-out2Will T2And a set value T20And T21Making a comparison, T20Less than T21；
If T2Less than T20The electric pump is electrified and started to operate, and the bypass valve is opened;
when T is2Greater than or equal to T21The electric pump and bypass valve are closed.
Detecting oil temperature T in water collection cavity1And water level information; will T1And a set value T10And T11Making a comparison, T10Less than T11；
If T1Greater than T10The heater is turned off;
if T1Less than or equal to T10The heater is started and continuously heated;
when T is1Greater than or equal to T11The heater is turned off;
the output voltage V of the high-pressure water level sensor is compared with a preset value V0Comparing if V is greater than or equal to V0The water drain valve is in a closed state; if V is less than V0And the water drain valve is opened, and the water drain valve is closed after the controller receives a low water level signal or reaches preset water drain time.
The invention has the following beneficial effects:
according to the invention, the oil pressure of the oil inlet and the oil outlet is detected in real time through the pressure sensor, the oil temperature of the oil outlet is detected in real time through the temperature sensor, and a signal is fed back to the controller, when the filter element is blocked and the fuel flow is reduced, the controller controls the electric pump and the bypass valve to be opened, flow compensation is carried out through the electric pump and the bypass valve, the stable operation of an oil supply system is ensured, the normal starting and operation of an engine are ensured, a vehicle can keep normal running, the filter element does not need to be replaced immediately, the replacement period of the filter element is prolonged, the service life of the fuel prefilter is further prolonged, the maintenance period of the fuel prefilter is prolonged, and the maintenance cost. According to the invention, the controller controls the electric pump, the drain valve, the bypass valve and the heater to be opened or closed, so that the intelligent control of the fuel prefilter is realized, and the operation is simpler and more convenient.
The filter screen is sleeved on the periphery of the oil inlet end of the electric pump, impurities, water and other pollutants in fuel oil are intercepted and filtered and then enter the oil inlet end, the situations of electric pump clamping stagnation, rusting and the like are avoided, the normal operation of the electric pump is ensured, and the service life of the electric pump is prolonged.
The controller intelligently controls the heater to be turned on or off, so that the vehicle can be quickly started and run at low temperature. The controller controls the opening or closing of the water drain valve through water level signals of the high water level sensor and the low water level sensor, so that the intelligent control water drainage function is realized, and the normal operation of the engine is ensured.
The center lines of the first connector and the second connector are parallel to each other and are perpendicular to the center line of the oil inlet; the center lines of the third port, the fourth port and the fifth port are parallel to each other and are parallel to the center line of the oil inlet; the fuel prefilter has a more compact overall structure and low requirements on installation space.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a perspective view from another perspective of the present invention.
Fig. 3 is a front view of fig. 1.
Fig. 4 is a cross-sectional view a-a of fig. 3.
Fig. 5 is a sectional view of B-B in fig. 3.
Fig. 6 is a bottom view of fig. 1.
Fig. 7 is a cross-sectional view of C-C in fig. 6.
FIG. 8 is a flow chart of a control method of the present invention.
In the figure: 1. a housing; 2. an oil inlet; 3. an oil outlet; 4. an upper cover; 5. a filter element; 6. a water collection cavity; 7. dirty oil side; 8. a clean oil side; 9. an electric pump; 10. a water drain valve; 11. a low water level sensor; 12. a first interface; 13. a second interface; 14. a controller; 15. a bypass valve; 16. a first pressure sensor; 17. a second pressure sensor; 18. a first joint; 19. a temperature sensor; 20. a third interface; 21. a one-way valve; 22. a fourth interface; 23. filtering with a screen; 24. a fifth interface; 25. a heater; 26. an oil inlet end; 27. an oil outlet end; 28. a second joint.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, an oil inlet 2 and a controller 14 are arranged on the peripheral wall surface of a housing 1 of the intelligent fuel prefilter, an oil outlet 3 is arranged at the bottom, an upper cover 4 is fixedly arranged at the upper end, and an internal cavity is formed in the housing 1; as shown in fig. 5, a filter element 5 is arranged at the upper part of the inner cavity of the housing 1, the upper part of the inner cavity is divided into a dirty oil side 7 positioned at the outer side of the filter element 5 and a clean oil side 8 positioned at the center of the filter element 5, the dirty oil side 7 is communicated with the oil inlet 2, and the clean oil side 8 is communicated with the oil outlet 3; a water collecting cavity 6 is arranged at the lower part of the cavity in the shell 1 and below the filter element 5, a heater 25 is arranged in the water collecting cavity 6, a temperature sensor (not shown in the figure) is integrated on the heater 25, a relay on a power supply of the heater 25 and the integrated temperature sensor are connected to the controller 14 through corresponding lines, the temperature sensor feeds an oil temperature signal detected in real time back to the controller 14, and the controller 14 controls the relay to be turned on or turned off according to the signal; when the oil temperature in the fuel prefilter is lower than the set temperature, the viscosity of the fuel is increased and even wax is deposited, the controller 14 controls the relay to be switched on, the power supply is switched on, the heater 25 is started, and the fuel is added and de-waxed; when the oil temperature rises to the set upper temperature limit, the controller 14 controls the relay to be closed, the power supply is cut off, and the heater 25 stops heating; the controller 14 intelligently controls the on or off of the heater 25, so that the vehicle can be quickly started and operated at low temperature. The heater 25 is provided with a high water level sensor (not shown in the figure), the bottom of the housing 1 and the outer side of the oil outlet 3 are provided with a water drain valve 10 and a low water level sensor 11 corresponding to the water collecting cavity 6, the water drain valve 10, the low water level sensor 11 and the high water level sensor are connected to the controller 14 through corresponding lines, when the controller 14 receives a high water level signal fed back by the high water level sensor, the controller 14 controls the water drain valve 10 to open for water drain, and when the controller 14 receives a low water level signal fed back by the low water level sensor 11, the controller 14 controls the water drain valve 10 to close, so that the intelligent control water drain function is realized, and the normal operation of the engine is ensured.
As shown in fig. 1 and 3, an electric pump 9 is arranged on the peripheral wall surface of the housing 1 and located on one side of the oil inlet 2, as shown in fig. 4 and 7, an oil inlet end 26 at the upper part of the electric pump 9 is communicated with the oil inlet 2, and a check valve 21 is arranged on the oil inlet 2 and located between the oil inlet end 26 and the dirty oil side 7 in the housing 1; as shown in fig. 1, 3 and 7, the oil outlet end 27 at the lower part of the electric pump 9 is communicated with a first interface 12, the first interface 12 is communicated with a second interface 13 at the periphery of the casing 1 through a pipeline, and as shown in fig. 4, the second interface 13 conducts the dirty oil side 7 in the casing 1. The check valve 21 and the electric pump 9 are arranged between the oil inlet 2 and the dirty oil side 7 in parallel, when the electric pump 9 works, the check valve 21 is closed, fuel oil in the oil inlet 2 flows into the oil outlet 27 from the oil inlet 26 of the electric pump 9, enters the dirty oil side 7 through the first connector 12 and the second connector 13, enters the clean oil side 8 after being filtered by the filter element 5, and is output from the oil outlet 3; when the engine is started, the fuel oil in the oil inlet 2 opens the check valve 21, directly enters the dirty oil side 7 from the opening of the check valve 21, enters the clean oil side 8 after being filtered by the filter element 5, and is output from the oil outlet 3. As shown in fig. 3 and 7, a filter screen 23 is sleeved on the periphery of the oil inlet end 26 of the electric pump 9, and impurities, water and other pollutants in the fuel oil are intercepted and filtered and then enter the oil inlet end 26, so that the conditions of clamping stagnation, rusting and the like of the electric pump 9 are avoided, the normal operation of the electric pump 9 is ensured, and the service life of the electric pump 9 is prolonged; after the one-way valve 21 is opened, the water and the impurities intercepted by the filter screen 23 enter the dirty oil side 7 along with the fuel oil and are further filtered by the filter element 5.
As shown in fig. 2, a bypass valve 15 is arranged on the outer side of the other side of the oil inlet 2 of the housing 1, the bypass valve 15 is fixedly arranged on a second joint 28, as shown in fig. 4, one end of the second joint 28 is communicated with a dirty oil side 7 in the housing 1 through a third interface 20, as shown in fig. 2, the other end of the second joint 28 is connected to a first joint 18 through a pipeline, as shown in fig. 6 and 5, the first joint 18 is communicated with the oil outlet 3 through a fifth interface 24, when the filter element 5 is blocked due to excessive impurities or low-temperature wax deposition of fuel, the bypass valve 15 is opened, the fuel on the dirty oil side 7 enters the oil outlet 3 through the third interface 20 and the fifth interface 24 and is discharged, the normal flow of the fuel in the oil supply system is ensured, the normal start and operation of the engine are ensured, and the normal.
As shown in fig. 2 and 4, a first pressure sensor 16 is further disposed outside the housing 1 on the other side of the oil inlet 2, and the first pressure sensor 16 is communicated with the dirty oil side 7 through a fourth interface 22, and is further communicated with the oil inlet 2, so as to detect the oil pressure of the oil inlet 2. As shown in fig. 2, the first joint 18 is provided with a second pressure sensor 17 and a temperature sensor 19, and the second pressure sensor 17 and the temperature sensor 19 are communicated with the oil outlet 3 through a fifth interface 24 and are used for detecting the oil pressure and the oil temperature at the oil outlet 3. The first pressure sensor 16, the second pressure sensor 17 and the temperature sensor 19 are connected to the controller 14 through corresponding lines, corresponding detection signals are fed back to the controller 14, and the controller 14 performs corresponding operations after analyzing and calculating according to corresponding information.
As shown in fig. 1 and fig. 2, the center lines of the first port 12 and the second port 13 are parallel to each other and perpendicular to the center line of the oil inlet 2; the center lines of the third port 20, the fourth port 22 and the fifth port 24 are parallel to each other and are parallel to the center line of the oil inlet 2; the fuel prefilter has a more compact overall structure and low requirements on installation space.
The controller 14 of the present invention is connected to a vehicle ECU (electronic control unit) through a line, and the vehicle ECU provides the controller with power14 provides power input and parking signal input, the controller 14 communicates with the ECU of the whole vehicle through a CAN (controller area network) bus to control the oil pressure P of the oil inlet 21Oil pressure P of oil outlet 32And oil temperature T2The oil pressure difference delta P between the oil inlet 2 and the oil outlet 3 and the oil temperature T in the water collecting cavity 61The parameters of the high water level state and the low water level state of the water collecting cavity 6, the state of the water drain valve 10, the state of the bypass valve 15, the state of the heater 25 and the like are output to an ECU of the whole vehicle, and the controller 14 can also be connected to related indicator lamps of an instrument panel through a line, so that the alarm functions of pre-filter blockage alarm, water level alarm, bypass valve 15 abnormal operation alarm, heater 25 abnormal operation alarm and the like are realized. Hall sensors are integrated with the drain valve 10 and the bypass valve 15, and the states of the drain valve 10 and the bypass valve 15 can be self-checked.
When the intelligent fuel prefilter is actually used, the whole vehicle is started, the ECU of the whole vehicle inputs power to the controller 14, the controller 14 carries out self-checking through the Hall sensors integrated by the water drain valve 10 and the bypass valve 15, the bypass valve 15 and the water drain valve 10 are confirmed to be in a closed state according to setting, the electric pump 9 is started to pump oil and exhaust air, and the electric pump 9 stops when the running time reaches the set time; during the running process of the whole vehicle, the controller 14 continuously receives the oil pressure P of the oil inlet 21Oil pressure P of oil outlet 32And oil temperature T2The oil pressure difference delta P between the oil inlet 2 and the oil outlet 3 and the oil temperature T in the water collecting cavity 61And the high water level signal and the low water level signal of the water collecting cavity 6, and controlling the opening or closing of the bypass valve 15, the electric pump 9, the water drain valve 10 and the heater 25 according to the information fed back by the signals.
A flow chart of the control method of the controller 14 is shown in fig. 8, and the specific working process is as follows:
(1) the first pressure sensor 16 detects the oil pressure P of the oil inlet 21The second pressure sensor 17 and the temperature sensor 19 detect the oil pressure P of the oil outlet 32And oil temperature T2The temperature sensor integrated on the heater 25 detects the temperature T of the oil in the water collecting cavity 61The high water level sensor and the low water level sensor 11 detect the water level of the water collecting cavity 6, and relevant detection signals are fed back to the controller14, the controller 14 controls the oil pressure P of the oil inlet 21Oil pressure P with oil outlet 32And comparing to obtain the oil pressure difference delta P.
(2) The controller 14 compares the corresponding signal with the corresponding set value, and executes a corresponding program according to the comparison result, specifically:
A. when the oil pressure difference delta P between the oil inlet 2 and the oil outlet 3 is smaller than the set delta P0At the moment, the fuel prefilter normally works, the electric pump 9 is closed after being electrified for a set time, and the fuel prefilter is subjected to conventional oil pumping and air exhausting; when the oil pressure difference Δ P is greater than or equal to Δ P0But less than Δ P1Or the oil temperature T of the oil outlet 32Less than or equal to a set value T20When the fuel flow is reduced, the electric pump 9 is electrified and started to operate, the fuel at the oil inlet 2 enters the dirty oil side 7 through the electric pump 9, the first interface 12 and the second interface 13, the fuel flow at the dirty oil side 7 is supplemented, and the stable operation of an oil supply system is ensured; when the oil pressure difference Δ P is greater than or equal to Δ P1At the moment, the filter element 5 is blocked, the electric pump 9 is continuously electrified and started to operate, the fuel oil flow is continuously supplemented to the dirty oil side 7, the continuous operation of the oil supply system is maintained, the vehicle can continuously operate for a period of time, and a client cannot lose the situation that the filter element 5 is blocked and cannot find a proper filter element 5 to replace in time; meanwhile, the blockage alarm signal of the filter element 5 is output and fed back to a related indicator light of the instrument panel, and a user is reminded of needing to replace the filter element 5 in time.
B. When the oil pressure P of the oil inlet 21Less than a set value P0At the moment, the fuel prefilter works normally, and the bypass valve 15 is closed; when the oil pressure P of the oil inlet 21Is greater than or equal to the set value P0Or the oil temperature T of the oil outlet 32Less than or equal to a set value T20At the moment, the filter element 5 is blocked due to impurities or low-temperature fuel oil waxing, the fuel oil flow is reduced, the controller 14 controls the bypass valve 15 to be opened, the fuel oil on the dirty oil side 7 is directly discharged from the oil outlet 3 through the third interface 20 and the fifth interface 24 without being filtered by the filter element 5, the fuel oil flow output from the oil outlet 3 is supplemented, the stable operation of an oil supply system is ensured, and the influence on the normal operation of a vehicle caused by the oil shortage of the oil supply system is prevented.
C. When the oil temperature T of the oil outlet 32Greater than a set value T20And is less than T21During the operation, the controller 14 controls the bypass valve 15 to be continuously opened, the fuel on the dirty oil side 7 is continuously discharged from the oil outlet 3 through the third interface 20 and the fifth interface 24, the flow of the fuel output from the oil outlet 3 is supplemented, and the stable operation of an oil supply system is ensured; when the oil temperature T of the oil outlet 32Greater than or equal to a set value T21At this time, the prefilter is operating normally and the bypass valve 15 is closed.
D. When the oil temperature T of the water collecting cavity 61Greater than a set value T10At the moment, the oil temperature in the water collecting cavity 6 is normal, and the heater 25 is in a closed state; when the oil temperature T1Less than or equal to a set value T10When the fuel is heated, the controller 14 controls the heater 25 to be turned on to heat the fuel; when the oil temperature T1Greater than a set value T10And is less than the set value T11When the fuel is heated, the controller 14 controls the heater 25 to be continuously turned on to continuously heat the fuel; when the oil temperature T1Is heated to greater than or equal to T11At this time, the controller 14 controls the heater 25 to be turned off to stop heating.
E. When parking, the output voltage V of the high water level sensor in the water collecting cavity 6 is larger than or equal to a set value V0At this time, the water level in the water collecting cavity 6 does not reach the high water level, and the water drain valve 10 is in a closed state; when the output voltage V is less than the set value V0The controller 14 feeds back the water level alarm signal to a related indicator lamp of the instrument panel, the controller 14 controls the water drain valve 10 to open and drain water, and after the controller 14 receives the low water level signal of the low water level sensor 11 or reaches the preset water drain time, the controller 14 controls the water drain valve 10 to close and stops outputting the water level alarm signal. The user can also manually turn on the low water level sensor 11 to drain water after finding the water level alarm signal when parking, and turn off the low water level sensor 11 after the water drain is finished, at the moment, the system stops outputting the water level alarm signal.
According to the invention, the oil pressure of the oil inlet 2 and the oil outlet 3 is detected in real time through the pressure sensor, the oil temperature of the oil outlet 3 is detected in real time through the temperature sensor, and the signal is fed back to the controller 14, when the filter element 5 is blocked and the fuel flow is reduced, the controller 14 controls the electric pump 9 and the bypass valve 15 to be opened, the flow compensation is carried out through the electric pump 9 and the bypass valve 15, the stable operation of an oil supply system is ensured, the normal starting and running of an engine are ensured, the vehicle can keep normal running, the filter element 5 does not need to be replaced immediately, the replacement period of the filter element 5 is prolonged, the service life of the fuel prefilter is prolonged, the maintenance period of the fuel prefilter is prolonged, and the maintenance cost. According to the invention, the controller 14 controls the electric pump 9, the drain valve 10, the bypass valve 15 and the heater 25 to be opened or closed, so that the intelligent control of the fuel prefilter is realized, and the operation is simpler and more convenient.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.
Claims (10)
1. The utility model provides an intelligence fuel prefilter sets up filter core (5) in shell (1), forms dirty oil side (7) that are located the filter core (5) outside and is located clean oil side (8) of filter core (5) central authorities, sets up oil inlet (2), oil-out (3), its characterized in that on shell (1): a one-way valve (21) and an electric pump (9) are arranged between the oil inlet (2) and the dirty oil side (7) in parallel, an oil inlet end (26) of the electric pump (9) is communicated with the oil inlet (2), and an oil outlet end (27) of the electric pump (9) is communicated with the dirty oil side (7);
a bypass valve (15) is arranged between the dirty oil side (7) and the oil outlet (3);
the oil inlet (2) is communicated with a first pressure sensor (16), and the oil outlet (3) is communicated with a second pressure sensor (17);
the electric pump (9), the bypass valve (15), the first pressure sensor (16) and the second pressure sensor (17) are connected to the controller (14) through corresponding lines; the controller (14) controls the opening or closing of the electric pump (9) and the bypass valve (15) through calculation according to pressure signals fed back by the first pressure sensor (16) and the second pressure sensor (17).
2. The intelligent pre-filter for fuel as recited in claim 1, wherein: the oil outlet (3) is also communicated with a temperature sensor (19), and the temperature sensor (19) is connected to the controller (14) through a corresponding line; the controller (14) controls the electric pump (9) and the bypass valve (15) to be opened or closed according to the oil temperature signal fed back by the temperature sensor (19).
3. The intelligent pre-filter for fuel as recited in claim 1, wherein: the periphery of the oil inlet end (26) of the electric pump (9) is sleeved with a filter screen (23).
4. The intelligent pre-filter for fuel as recited in claim 1, wherein: a water collecting cavity (6) is formed in the shell (1) and located below the filter element (5), a heater (25) is arranged in the water collecting cavity (6), a temperature sensor is integrated on the heater (25), the heater (25) and the temperature sensor are connected to a controller (14), and the controller (14) controls the heater (25) to be turned on or turned off according to an oil temperature signal fed back by the temperature sensor.
5. The intelligent pre-filter for fuel as recited in claim 4, wherein: the water drain valve (10) is arranged on the shell (1) corresponding to the water collecting cavity (6), the high water level sensor and the low water level sensor (11) are arranged in the water collecting cavity (6), the water drain valve (10), the high water level sensor and the low water level sensor (11) are connected to the controller (14), and the controller (14) controls the opening or closing of the water drain valve (10) according to water level signals fed back by the high water level sensor and the low water level sensor (11).
6. The intelligent pre-filter for fuel as recited in claim 1, wherein: an oil outlet end (27) of the electric pump (9) is communicated with the dirty oil side (7) through a first connector (12) and a second connector (13); the bypass valve (15) is arranged on the second joint (28), one end of the second joint (28) is communicated with the dirty oil side (7) through a third interface (20), the other end of the second joint is connected to the first joint (18) through a pipeline, and the first joint (18) is communicated with the oil outlet (3) through a fifth interface (24).
7. The intelligent pre-filter for fuel as recited in claim 6, wherein: the central lines of the first connector (12) and the second connector (13) are parallel to each other and are perpendicular to the central line of the oil inlet (2); the center lines of the third joint (20), the fourth joint (22) and the fifth joint (24) are parallel to each other and are parallel to the center line of the oil inlet (2).
8. A control method of a fuel prefilter is characterized by comprising the following steps: the intelligent pre-filter for fuel as claimed in any one of claims 1 to 7, comprising the following steps,
detect oil pressure P of oil inlet (2)1Oil pressure P of oil outlet (3)2The difference Δ P between the two is compared with a set value Δ P0And Δ P1Make a comparison, Δ P0Less than Δ P1；
If Δ P is less than Δ P0The electric pump (9) is electrified to pump oil and exhaust air, and is closed after the set time is reached;
when Δ P is greater than or equal to Δ P1The electric pump (9) is continuously electrified to operate, and an alarm signal for blocking the filter element (5) is output;
the oil pressure P1And a set value P0Making a comparison if P1Less than P0The bypass valve (15) is closed; if P1Greater than or equal to P0The bypass valve (15) is opened.
9. A method of controlling a pre-filter for fuel as claimed in claim 8, wherein: detecting the oil temperature T of the oil outlet (3)2Will T2And a set value T20And T21Making a comparison, T20Less than T21；
If T2Less than T20The electric pump (9) is electrified and started to operate, and the bypass valve (15) is opened;
when T is2Greater than or equal to T21An electric pump (9) and a bypassThe valve (15) is closed.
10. A method of controlling a pre-filter for fuel as claimed in claim 8, wherein: detecting the temperature T of the oil in the water collecting cavity (6)1And water level information; will T1And a set value T10And T11Making a comparison, T10Less than T11；
If T1Greater than T10The heater (25) is turned off;
if T1Less than or equal to T10The heater (25) is started and continuously heated;
when T is1Greater than or equal to T11The heater (25) is turned off;
the output voltage V of the high-pressure water level sensor is compared with a preset value V0Comparing if V is greater than or equal to V0The water drain valve (10) is in a closed state; if V is less than V0The water drain valve (10) is opened, and the water drain valve (10) is closed after the controller (14) receives a low water level signal or reaches a preset water drain time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010515766.9A CN111608831A (en) | 2020-06-09 | 2020-06-09 | Intelligent fuel prefilter and control method thereof |
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| CN202010515766.9A CN111608831A (en) | 2020-06-09 | 2020-06-09 | Intelligent fuel prefilter and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377343A (en) * | 2020-11-11 | 2021-02-19 | 杭叉集团股份有限公司 | Fuel system and fuel system protection method |
| CN114856877A (en) * | 2022-05-24 | 2022-08-05 | 浙江臻航实业集团有限公司 | Fuel oil filtering system |
| CN115069001A (en) * | 2022-07-11 | 2022-09-20 | 河南航天液压气动技术有限公司 | Intelligent heating fuel oil filter |
| CN114856877B (en) * | 2022-05-24 | 2024-06-28 | 浙江臻航实业集团有限公司 | Fuel oil filtering system |
-
2020
- 2020-06-09 CN CN202010515766.9A patent/CN111608831A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377343A (en) * | 2020-11-11 | 2021-02-19 | 杭叉集团股份有限公司 | Fuel system and fuel system protection method |
| CN114856877A (en) * | 2022-05-24 | 2022-08-05 | 浙江臻航实业集团有限公司 | Fuel oil filtering system |
| CN114856877B (en) * | 2022-05-24 | 2024-06-28 | 浙江臻航实业集团有限公司 | Fuel oil filtering system |
| CN115069001A (en) * | 2022-07-11 | 2022-09-20 | 河南航天液压气动技术有限公司 | Intelligent heating fuel oil filter |
| CN115069001B (en) * | 2022-07-11 | 2024-06-25 | 河南航天液压气动技术有限公司 | Intelligent heating fuel filter |
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Address after: 214000 4 / F, building B-2, whale tower, software park, 111 Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province Applicant after: WUXI YILI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Applicant after: Hebei Yili Technology Co., Ltd Address before: 214135 4th Floor of Whale B-2 Building, 111 Linghu Avenue, Xinwu District, Wuxi City, Jiangsu Province Applicant before: WUXI YILI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Applicant before: HEBEI YILI GROUP Co.,Ltd. |