AU2021104680A4 - Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control Method Thereof - Google Patents
Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control Method Thereof Download PDFInfo
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- AU2021104680A4 AU2021104680A4 AU2021104680A AU2021104680A AU2021104680A4 AU 2021104680 A4 AU2021104680 A4 AU 2021104680A4 AU 2021104680 A AU2021104680 A AU 2021104680A AU 2021104680 A AU2021104680 A AU 2021104680A AU 2021104680 A4 AU2021104680 A4 AU 2021104680A4
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- 239000000446 fuel Substances 0.000 title claims abstract description 252
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 94
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 94
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 239000002828 fuel tank Substances 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 9
- 239000012071 phase Substances 0.000 claims description 52
- 239000002101 nanobubble Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 238000003745 diagnosis Methods 0.000 claims description 2
- 239000007791 liquid phase Substances 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000000733 zeta-potential measurement Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000003981 vehicle Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- 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
- F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention belongs to technical field of engine fuel pretreatment, in particular to a
preparation and supply system of bubble flow premixed hydrocarbon fuel and a control method
thereof. The system are composed of a fuel tank, a fuel filter, a controllable four-way valve, a
Bulk Phase Nano-Scale Bubble Flow Premixed Hydrocarbon Fuel Preparation System
(abbreviated as BFPFPS) , a Storage Device of Bulk Phase Nano-Scale Bubble Flow Premixed
Hydrocarbon Fuel (abbreviated as SDBFPF), a gas-liquid separator II, a high-pressure fuel
pump, a high-pressure fuel rail, an fuel injector, a controllable three-way valve, an Electronic
Control Unit (abbreviated ECU), a bubble concentration sensor I, a liquid level sensor, a bubble
concentration sensor II and a fuel rail pressure sensor. The hydrocarbon fuel is preliminarily
processed with the BFPFPS to generate bulk phase nano-scale bubbly premixed hydrocarbon
fuel, which enters the SDBFPF for refinement and storage, then enters the high-pressure fuel
rail to establish rail pressure. The processed fuel is injected into the engine with the injector to
be mixed with air for combustion during the engine operation. The present invention has a
reasonable structure and can realize the pretreatment of hydrocarbon fuel, increase the mixing
uniformity of fuel and air, as well as improve the combustion process of engine fuel.
1/2
FIGURES
22 21 20 19 18 17 16 15 14 13 12
e- - - - - - -ighpressure fuel n and closing sign/
I bighu-press -aL 4 -pressure reg ulating valve uel rail
controllable
threeway i
f uelc rail pressure signal
vavix -d-d--b--- bubblena
al
oe
cofncentration high
r --- -- signal 2 Epressure
1
1 ful tnk I I bbble 11fuep
I-cncntaton - ntake anifold • • •• pm
fuel signal 1 •
vave1 trll e - - w-p sure ano-bbbl device of
valve fulpmp anrtr premixed •
3 ~ Valve 2 ir filter • air pump ful
gsparatir
bu phase nan caleb ble flow premnixed
drocarbon ipep tien system
4 5 6 7 8 9 10
fuel circuit air circuit > Signai
connection ...."0" connection - > connection
Figure I A structural schematic diagram of the system for preparing and supplying
premixed hydrocarbon fuel in bulk phase nano-scale bubble flow for vehicles and a
control method thereof.
Description
1/2
22 21 20 19 18 17 16 15 14 13 12
e- - - - - - -ighpressure fuel n and closing sign/
I 4 bighu-press -aL -pressure reg ulating valve uel rail controllable threeway i fuelc rail pressure signal vavix -d-d--b--- cofncentration bubblena al oe high signal 2 Epressure 1 -- r --- 1 ful tnk I I bbble 11fuep I-cncntaton - ntake anifold • • •• pm
fuel signal 1 •
vave1 trll e - - w-p sure ano-bbbl device of valve fulpmp anrtr premixed •
ful gsparatir 3 ~ Valve 2 ir filter • air pump
bu phase nan caleb ble flow premnixed drocarbon ipep tien system
4 5 6 7 8 9 10
fuel circuit air circuit > Signai connection "0" .... connection - > connection
Figure I A structural schematic diagram of the system for preparing and supplying
premixed hydrocarbon fuel in bulk phase nano-scale bubble flow for vehicles and a
control method thereof.
Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control
Method Thereof
The invention relates to that technical field of engine fuel pretreatment, in particular to a
preparation and supply system of bubble flow premixed hydrocarbon fuel and a control method
thereof.
At present, the mixing uniformity of fuel and air is improved mainly by adopting high-pressure
injection technology, variable valve technology and coordinated intake control. Although the
application of the above technology can improve the atomization degree of fuel and improve the
mixing uniformity, the further improvement of mixing uniformity adopting the current
technology route will greatly improve the complexity of the engine system and control, the
material strength requirements of the actuator, and the manufacturing cost of the whole vehicle.
By premixing fuel and air in nanometre scale, the properties of fuel can be improved, the mixing
uniformity of fuel and air can be effectively improved, the thermal efficiency of engine can be
improved, and the emission of incomplete combustion products can be reduced. However, at
present, the preparation and supply system of bulk phase nano-scale bubble flow hydrocarbon
fuel is mainly used in experimental research, because its preparation rate and supply stability
cannot meet the standard of real vehicle application.
In order to solve the above problems, the present invention provides a system for preparing and
supplying bulk phase nano-scale bubble flow hydrocarbon fuel, which can be applied to the
existing automobile power system. The provided system can pretreat hydrocarbon fuel, improve
the mixing uniformity of fuel and air, and improve the combustion process of engine fuel.
Further, a control method aiming at this system is proposed by the invention as well.
The purpose of this section is to summarize some aspects of the embodiments of the present
invention and briefly introduce some preferred embodiments. Some simplifications or omissions
may be made in this part, the abstract of the specification and the title of the invention to avoid
obscuring the purpose of these parts , but such simplifications or omissions cannot be used to
limit the scope of the invention.
In view of the problems existing in the bubble phase flow premixed hydrocarbon fuel
preparation and supply system and its control method, the present invention is proposed.
Therefore, it is an object of the present invention to provide a bubble flow premixed hydrocarbon
fuel preparation and supply system and a control method thereof, which can realize the
pretreatment of hydrocarbon fuel, improve the mixing uniformity of fuel and air, and improve
the combustion process of engine fuel.
To solve the above technical problems, according to one aspect of the present invention, the
present invention provides the following technical scheme.
A preparation and supply system of bubble flow premixed hydrocarbon fuel as well as its control
method comprise a fuel tank, a fuel filter, a controllable four-way valve, a Bulk Phase Nano
Scale Bubble Flow Premixed Hydrocarbon Fuel Preparation System (abbreviated as BFPFPS) , a
Storage Device of Bulk Phase Nano-Scale Bubble Flow Premixed Hydrocarbon Fuel
(abbreviated as SDBFPF), a gas-liquid separator II, a high-pressure fuel pump, a high-pressure
fuel rail, an fuel injector, a controllable three-way valve, an Electronic Control Unit (abbreviated
ECU), a bubble concentration sensor I , a liquid level sensor, a bubble concentration sensor II
and a fuel rail pressure sensor.
Specifically, the outlet of the fuel tank is connected with the inlet of the fuel filter, so as to filter
impurities of liquid fuel and prevent the fuel supply system from being blocked.
The outlets of the fuel filter and the SDBFPF as well as the outlet valve 3 of the controllable
three-way valve are respectively connected to the inlet 1, the inlet 2 and the inlet 3 of the
controllable four-way valve. And further, the inlet valve 1 and inlet valve 2 of the controllable four-way valve and the outlet valve 3 and the valve 4 of the controllable three-way valve can be controlled with the ECU. Switching different working modes through the switches of different valve bodies to meet the engine's demand for the bubble concentration of bulk phase nano-scale bubble flow premixed hydrocarbon fuel.
The BFPFPS comprises a low-pressure fuel pump, a nano-bubble generator, an air filter and an
air pump. The outlet of the controllable four-way valve is connected with the inlet of low
pressure fuel pump, and the outlet of the low-pressure fuel pump is connected to the liquid inlet
of the nano-bubble generator. The outlet of the air filter is connected with the inlet of an air
pump, and the outlet of the air pump is connected to the gas inlet of the nano-bubble generator.
The outlet of the nano-bubble generator is connected with the inlet of the SDBFPF. Under the
mechanical action of nano-bubble generator, hydrocarbon fuel and gas are fully mixed, and the
gas is broken into nano-scale bubbles under the action of shear force in the liquid phase of
hydrocarbon fuel and stabilized in hydrocarbon fuel for a long time to form bulk phase nano
scale bubble flow premixed hydrocarbon fuel, which is supplied to the SDBFPF for refinement
and storage.
The SDBFPF is integrated with the gas-liquid separator I , the liquid level sensor and the
bubble concentration sensor I . The gas outlet of that SDBFPF is connected with the engine
intake manifold, and the fuel outlet of the SDBFPF is connected with the gas-liquid separator II
. The SDBFPF stratifies bulk phase nano-scale bubble flow premixed hydrocarbon fuel with
different concentrations through air floatation, and sucks out the bulk phase nano-scale bubble
flow premixed hydrocarbon fuel with larger bubble scale through the fuel return port for
refinement, so as to obtain nano-bubbles with target scale. The gas-liquid separator I is installed
on the top of the SDBFPF. It is used to separates macro bubbles in the bulk phase nano-scale
bubble flow premixed hydrocarbon fuel from the hydrocarbon fuel, and supplies gas mixed with
hydrocarbon fuel vapor to the engine for combustion through the engine intake manifold. The liquid level sensor transmits the liquid level signal to the ECU for processing after measuring the liquid level. The bubble concentration sensor I is arranged near the fuel return port of the
SDBFPF, and transmits the bubble concentration signal of the bulk phase nano-scale bubble flow
premixed hydrocarbon fuel to the ECU for processing.
The inlet of that gas-liquid separator II is respectively connected with the fuel outlet of the
SDBFPF and the outlet valve 4 of the controllable three-way valve. Besides, the outlet of the
gas-liquid separator II is connected with the inlet of the high-pressure fuel pump.
The outlet of that high-pressure fuel pump is connected to the fuel inlet of the high-pressure fuel
rail, and the fuel outlet of the high-pressure fuel rail is connected to the fuel injector. The
pressure regulating valve of the high-pressure fuel rail is connected with the inlet of the
controllable three-way valve, and the ECU controls the opening and close of the pressure
regulating valve so as to control the high-pressure fuel rail. The high-pressure fuel rail
establishes a high-pressure environment for the bulk phase nano-scale bubble flow premix
hydrocarbon fuel, which can effectively reduce the injection time and further promote the
atomization quality after injection.
The inlet of the ECU is connected with the bubble concentration sensor I and the liquid level
sensor in the SDBFPF, and it is also connected with the fuel rail pressure sensor and the bubble
concentration sensor II of the high-pressure fuel rail. The outlet of that ECU is connected with
the controllable four-way valve, the controllable three-way valve, the high-pressure fuel rail
pressure regulating valve, the BFPFPS and the high-pressure fuel pump. The rail pressure control
of the fuel supply system and the switching of different modes are completed through the control
of the actuator by the ECU.
As a preferred scheme of the bubble flow premixed hydrocarbon fuel preparation and supply
system and the control method thereof, the high-pressure fuel rail is provided with a bubble
concentration sensor II to obtain the bubble concentration signal of the bulk phase nano-scale bubble flow premixed hydrocarbon fuel in the high-pressure fuel rail, which can be used for judging the fuel supply cycle and also for fault diagnosis and analysis.
As a preferred scheme of the bubble flow premixed hydrocarbon fuel preparation and supply
system and the control method thereof, it specifically includes the following steps.
Step 1. Judging whether that bulk phase nano-scale bubble flow premix hydrocarbon fuel needs
supplementary preparation according to the signal of the liquid level sensor in the SDBFPF.
Step 2. Judging whether the bulk nano-scale bubble flow premixed hydrocarbon fuel in the
SDBFPF needs refinement or re-preparation according to the signal of a bubble concentration
sensor I in the SDBFPF.
Step 3. Judging that cycle used for fuel supply and whether to refine the bulk phase nano-scale
bubble flow premixed hydrocarbon fuel in the high-pressure fuel rail according to the signals of
the bubble concentration sensor I and the bubble concentration sensor II.
Step 4. Waiting for the engine start signal and waiting for the rail pressure to be established.
Compared with the prior art, the invention has the beneficial effects that through ingenious
arrangement and connection of various devices, the bulk phase nano-scale bubble flow premixed
hydrocarbon fuel required by the engine can be quickly prepared. In addition, while the stable
operation of the engine is guaranteed, the bulk phase nano-scale bubble flow premixed
hydrocarbon fuel can be quickly supplied to the engine, so that the oxygen concentration,
premixing ratio and mixing uniformity of the fuel in the atomizing process can be improved by
utilizing the properties of the bulk phase nano-scale bubble flow, and the purpose of promoting
efficient and clean combustion of the engine can be achieved.
In order to explain the technical scheme of the embodiments of the present invention more
clearly, the present invention will be described in detail with reference to the figures and detailed
embodiments. Obviously, the figures in the following description are only some embodiments of the present invention, and others can be obtained according to these for ordinary technicians in the field without paying creative labour.
Figure 1 is a structural schematic diagram of the system for preparing and supplying premixed
hydrocarbon fuel in bulk phase nano-scale bubble flow for vehicles and a control method
thereof.
Figure 2 is a logical block diagram of the control method of the preparation and supply of
premixed hydrocarbon fuel in bulk phase nano-scale bubble flow.
Wherein, 1- fuel tank, 2- fuel filter, 3- controllable four-way valve, 4- bulk phase nano-scale
bubble flow premixed hydrocarbon fuel preparation system, 5- low-pressure fuel pump, 6- air
filter, 7- nano-bubble generator, 8- air pump, 9- storage device of bulk phase nano-scale bubble
flow premixed hydrocarbon fuel, 10- gas-liquid separator II, 11- high-pressure fuel pump, 12
gas-liquid separator I , 13- bubble concentration sensor I , 14- liquid level sensor, 15- intake
manifold, 16- engine, 17- fuel injector, 18- high-pressure fuel rail, 19- bubble concentration
sensor II, 20- fuel rail pressure sensor, 21- electronic control unit, 22- controllable three-way
valve.
In order to make the above objects, features and advantages of the present invention more
obvious and understandable, the specific embodiments of the present invention will be described
in detail with reference to the accompanying figures.
In the following description, many specific details are set forth in order to fully understand the
present invention, but the present invention can be implemented in other ways different from
those described here, and those skilled in the art can make similar popularization without
violating the connotation of the present invention, so the present invention is not limited by the
specific embodiments disclosed below.
Secondly, the present invention will be described in detail with the schematic diagram. When
describing the embodiment of the present invention in detail, for convenience of explanation, the
cross-sectional diagram showing the device structure will not be enlarged locally in general
scale, and the schematic diagram is only an example, which should not limit the protection scope
of the present invention here. In addition, the three-dimensional dimensions of length, width and
depth should be included in the actual production.
In order to make the object, technical scheme and advantages of the present invention clearer, the
embodiments of the present invention will be further described in detail with reference to the
accompanying figures.
Embodiment 1
The preparation and supply system of bubble flow premixed hydrocarbon fuel, as well as the
control method thereof, are composed of a fuel tank (1), a fuel filter (2), a controllable four-way
valve (3), a Bulk Phase Nano-Scale Bubble Flow Premixed Hydrocarbon Fuel Preparation
System (abbreviated as BFPFPS) (4) , a Storage Device of Bulk Phase Nano-Scale Bubble Flow
Premixed Hydrocarbon Fuel (abbreviated as SDBFPF) (9), a gas-liquid separator II (10), a
high-pressure fuel pump (11), a high-pressure fuel rail (18), an fuel injector (17), a controllable
three-way valve (22), an Electronic Control Unit (abbreviated ECU) (21), a bubble concentration
sensor I (13), a liquid level sensor (14), a bubble concentration sensor II (19) and an fuel rail
pressure sensor (20). The hydrocarbon fuel is preliminarily processed with the BFPFPS (4) to
generate bulk phase nano-scale bubbly premixed hydrocarbon fuel, which enters the SDBFPF (9)
for refinement and storage, then enters the high-pressure fuel rail (18) to establish rail pressure.
The processed fuel is injected into the engine with the injector to be mixed with air for
combustion during the engine operation.
In terms of fuel circuit connection, the outlet of fuel tank (1) is connected with the inlet of fuel
filter (2). The inlet of the fuel filter (2) is connected with the inlet valve 1 of the controllable
four-way valve (3). The outlet of the controllable four-way valve (3) is connected with the inlet of the low-pressure fuel pump (5) of the BFPFPS (4). The outlet of that low-pressure fuel pump
(5) is connected with the liquid inlet of the nano-bubble generator (7). The outlet of nano-bubble
generator (7) is connected with inlet of SDBFPF (9). The fuel return port of the SDBFPF (9) is
connected with inlet valve 2 of the controllable four-way valve (3), while the fuel outlet of the
SDBFPF (9) is connected with inlet 1 of the gas-liquid separator II (10). The outlet of the gas
liquid separator II (10) is connected with the inlet of the high-pressure fuel pump (11). The
outlet of the high-pressure fuel pump (11) is connected with the inlet of high-pressure fuel rail
(18), and the fuel outlet of high-pressure fuel rail (18) is connected with the fuel injector (17).
Besides, the pressure regulating valve of high-pressure fuel rail (18) is connected with the inlet
of the controllable three-way valve (22). The outlet valve 3 of the controllable three-way valve
(22) is connected with the inlet 3 of controllable four-way valve (3), and the outlet valve 4 of the
controllable three-way valve (22) is connected with the inlet 2 of gas-liquid separator II (10).
The nozzle of that fuel injector (17) is connected with the combustion chamber of the engine.
In terms of air circuit connection, the outlet of air filter (6) is connected with the inlet of air
pump, and the air pump (8) is connected with the air inlet of the nano-bubble generator (7). The
gas outlet of the SDBFPF (9) is connected with the intake manifold (15) of engine. The gas
outlet of the gas-liquid separator II (10) is connected with the intake manifold (15) of engine.
In terms of the signal connection, the bubble concentration sensor I (13), the liquid level
sensor (14), the bubble concentration sensor II (19) and the fuel rail pressure sensor (20) are
connected with the inlet of the ECU (21). Further, the outlet of the ECU (21) is connected with
the controllable four-way valve (3), the controllable three-way valve (22), the pressure regulating
valve of the high-pressure fuel rail (18), the BFPFPS (4) and the high-pressure fuel pump (11).
The preparation of premixed hydrocarbon fuel with nano-scale bubble flow in bulk phase is
described below. Hydrocarbon fuel is sucked from fuel tank (1) into fuel filter (2) for filtration to
remove impurities. Then enter it into the BFPFPS (4) through a controllable four-way valve (3) for pretreatment, and the generated bulk phased nano-scale bubble flow premixed hydrocarbon fuel enters the SDBFPF (9). If further refinement is needed, the bulk phase nano-scale bubbly premixed hydrocarbon fuel enters the BFPFPS (4) through the fuel return port of the SDBFPF
(9) and the controllable four-way valve (3) for further refinement. If refinement is not needed, it
is temporarily stored in the SDBFPF (9). At the start of fuel supply, the bulk phase nano-scale
bubble flow premixed hydrocarbon fuel enters the high-pressure fuel rail (18) through the gas
liquid separator II (10) and the high-pressure fuel pump (11) to establish the rail pressure,
waiting for the engine start signal, and entering the engine through the fuel injector (17). The
pressure of that high-pressure fuel rail (18) is regulated by the pressure regulating valve of the
high-pressure fuel rail (18). When the bulk phase nano-scale bubble flow premixed hydrocarbon
fuel in the SDBFPF (9) needs to quickly enter the high-pressure fuel rail (18), the hydrocarbon
fuel in the high-pressure fuel rail (18) quickly enters the BFPFPS (4) through the controllable
three-way valve (22) and the controllable four-way valve (3) for re-preparation/refinement;
otherwise, the fuel re-enters the high-pressure fuel rail (18) through the controllable three-way
valve (22), the gas-liquid separator II (10) and the high-pressure fuel pump (11).
The invention provides a control method for the preparation and supply system of the bulk phase
nano-scale bubble flow premixed hydrocarbon fuel. The control method is divided into two
parts. The first part is the preparation and refinement control method of bulk phase nano-scale
bubble flow premixed hydrocarbon fuel, so as to ensure that enough bulk phase nano-scale
bubble flow premixed hydrocarbon fuel is stored in the SDBFPF (9) to meet the engine
requirements; in the second part, aiming at the application of bulk phase nano-scale bubbly flow
premixed hydrocarbon fuel, the existing control method of fuel supply system is improved to
ensure that the concentration of the bulk phase nano-scale bubbly flow premixed hydrocarbon
fuel meets the requirements of engine.
The preparation and refinement control method of that bulk phase nano-scale bubble flow
premix hydrocarbon fuel comprises the follow steps.
Step 1. After receiving the power supply signal, the ECU (21) initializes to keep all valve bodies
and fuel pumps closed.
Step 2. Judging the liquid level signal obtained by the liquid level sensor (14) in the SDBFPF
(9), and if the liquid level is lower than the lowest liquid level, opening the valve 1 connected
with the controllable four-way valve (3) and the fuel tank (1); otherwise, a second judgment is
made. If the liquid level is lower than the maximum liquid level, the states of the valve 1 and the
BFPFPS (4) will remain unchanged, and if the liquid level is higher than the maximum liquid
level, the valve 1 will be closed.
Step 3. Further, the bubble concentration signal obtained by the bubble concentration sensor I
(13) is judged, and if the bubble concentration is less than the target bubble concentration, the
valve 2 is opened, so that the premixed hydrocarbon fuel of the bulk phase nano-scale bubble
flow returns to the nano-bubble generator (7) for further refinement; otherwise, the valve 2 is
closed, and the preparation is completed, and the bulk phase nano-scale bubble flow premixed
hydrocarbon fuel is supplied to the engine according to the engine demand.
The bulk phase nano-scale bubble flow premixed hydrocarbon fuel supply control method is
improved on the basis of the existing control strategy of the high-pressure fuel rail (18), and the
following steps are added for improvement before the rail pressure is established.
Step 4. Determine the bubble concentration signal obtained by the bubble concentration sensor
II (19). If the bubble concentration is greater than the target bubble concentration, open the
valve 4 and close the valve 3. After this state, the supply preparation of bulk phase nano-scale
bubble flow premixed hydrocarbon fuel is completed. Then, wait for the start signal with the
establishment of the fuel rail pressure. If the bubble concentration is less than the target bubble
concentration, further judge the bubble concentration signal obtained by bubble concentration
sensor II (13); if the bubble concentration is less than the target bubble concentration, open
valve 4, close valve 3, adjust the opening of high-pressure rail pressure regulating valve to maximum, start the high-pressure fuel pump (10), and wait for the rail pressure to be established.
As a result, the hydrocarbon fuel pass through gas-liquid separator II (10), so as to avoid air
resistance caused by bubble aggregation and precipitation, which will affect the establishment of
rail pressure. The aiming of the state is giving priority to fuel supply preparation, and waiting for
preparation of the bulk phase nano-scale bubble flow premixed hydrocarbon fuel. If the bubble
concentration is greater than the target bubble concentration, open the valve 3 and close the
valve 4, then adjust the opening of the high-pressure fuel rail pressure regulating valve to the
maximum, and refine the bulk phase nano-scale bubble flow premixed hydrocarbon fuel in the
high-pressure fuel rail (18) again.
Step 5. Determine whether the valves 1, 2 and 3 are all closed. If they are all closed, the BFPFPS
(4) is closed, and if not, the BFPFPS (4) is opened.
Step 6. Output the opening and closing signals of valve 1, valve 2, valve 3, valve 4 and the
BFPFPS (4).
Step 7. Wait for the engine start signal and wait for the rail pressure to be established.
Step 8. Circulate from Step 2 to Step 7.
Although the present invention has been described above with reference to embodiments, various
modifications may be made, and equivalents may be substituted for components thereof without
departing from the scope of the present invention. Especially, as long as there is no structural
conflict, the features in the embodiments disclosed in the present invention can be combined
with each other in any way. These combinations are not described exhaustively in this
specification only for the sake of omitting space and saving resources. Therefore, the present
invention is not limited to the specific embodiments disclosed herein, but includes all technical
solutions falling within the scope of the claims.
Claims (9)
1. A preparation and supply system of bubble flow premixed hydrocarbon fuel, characterized by
comprising a fuel tank (1), a fuel filter (2), a controllable four-way valve (3), a Bulk Phase Nano
Scale Bubble Flow Premixed Hydrocarbon Fuel Preparation System (abbreviated as BFPFPS)
(4) , a Storage Device of Bulk Phase Nano-Scale Bubble Flow Premixed Hydrocarbon Fuel
(abbreviated as SDBFPF) (9), a gas-liquid separator II (10), a high-pressure fuel pump (11), a
high-pressure fuel rail (18), an fuel injector (17), a controllable three-way valve (22), an
Electronic Control Unit (abbreviated ECU) (21), a bubble concentration sensor I (13), a liquid
level sensor (14), a bubble concentration sensor 11 (19) and a fuel rail pressure sensor (20). The
hydrocarbon fuel is preliminarily processed with the BFPFPS (4) to generate bulk phase nano
scale bubbly premixed hydrocarbon fuel, which enters the SDBFPF (9) for refinement and
storage, then enters the high-pressure fuel rail (18) to establish rail pressure. The processed fuel
is injected into the engine with the injector to be mixed with air for combustion during the engine
operation.
2. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that:
In terms of fuel circuit connection, the outlet of fuel tank (1) is connected with the inlet of fuel
filter (2). The outlet of the fuel filter (2) is connected with the inlet valve 1 of the controllable
four-way valve (3). The outlet of the controllable four-way valve (3) is connected with the inlet
of the low-pressure fuel pump (5) of the BFPFPS (4). The outlet of that low-pressure fuel pump
(5) is connected with the liquid inlet of the nano-bubble generator (7). The outlet of nano-bubble
generator (7) is connected with inlet of the SDBFPF (9). The fuel return port of the SDBFPF (9)
is connected with inlet valve 2 of the controllable four-way valve (3), while the fuel outlet of the
SDBFPF (9) is connected with inlet 1 of the gas-liquid separator 11 (10). The outlet of the gas
liquid separator 11(10) is connected with the inlet of the high-pressure fuel pump (11). The outlet of the high-pressure fuel pump (11) is connected with the inlet of high-pressure fuel rail (18), and the fuel outlet of high-pressure fuel rail (18) is connected with the fuel injector (17). Besides, the pressure regulating valve of high-pressure fuel rail (18) is connected with the inlet of the controllable three-way valve (22). The outlet valve 3 of the controllable three-way valve (22) is connected with the inlet 3 of controllable four-way valve (3), and the outlet valve 4 of the controllable three-way valve (22) is connected with the inlet 2 of the gas-liquid separator11 (10).
The nozzle of the fuel injector (17) is connected with the combustion chamber of the engine.
In terms of air circuit connection, the outlet of air filter (6) is connected with the inlet of air
pump (8), and the air pump (8) is connected with the air inlet of the nano-bubble generator (7).
The gas outlet of the SDBFPF (9) is connected with the intake manifold (15) of engine. The gas
outlet of the gas-liquid separator 11 (10) is connected with the intake manifold (15) of engine.
In terms of the signal connection, the bubble concentration sensor I (13), the liquid level sensor
(14), the bubble concentration sensor 11 (19) and the fuel rail pressure sensor (20) are connected
with the inlet of the ECU (21). The outlet of the ECU (21) is connected with the controllable
four-way valve (3), the controllable three-way valve (22), the pressure regulating valve of the
high-pressure fuel rail (18), the BFPFPS (4) and the high-pressure fuel pump (11).
3. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the controllable four-ways valve (3) is provided with three
inlets and one outlet. The inlet 1, the inlet 2 and the inlet 3 of the controllable four-way valve are
connected with the outlets of the fuel filter, the SDBFPF, and the outlet valve 3 of the
controllable three-way valve, respectively. The outlet of the controllable four-way valve is
connected with inlet of high pressure fuel pump (11) of the preparation and supply system for
bulk phase nano-scale bubble flow premixed hydrocarbon fuel. The opening and closing of the
inlet valve 1 and the inlet valve 2 can be controlled with the opening and closing signals sent
from the ECU.
4. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the controllable three-ways valve (22) is provided with one
inlet and two outlets. The inlet of the controllable three-ways valve (22) is connected with the
high pressure fuel rail (18) and the fuel return port of fuel injector (17). The outlet valve 3 and
the outlet valve 4 are connected with the inlet 3 of the controllable four-ways valve (3) and the
inlet of the gas liquid separator 11 (10), respectively. The opening and closing of the outlet valve
3 and the outlet valve 4 can be controlled through the opening and closing signals sent from the
ECU (21).
5. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the BFPFPS (4) comprises a low-pressure fuel pump (5) , a
nano-bubble generator (7), an air filter (6) and an air pump (8). The outlet of the low-pressure
fuel pump (5) is connected with the liquid inlet of the nano-bubble generator (7). The outlet of
the air filter (6) is connected with the inlet of an air pump (8), and the outlet of the air pump (8)
is connected with the gas inlet of the nano-bubble generator (7). Among them, the nano-bubble
generator (7) adopts but not limited to the mechanical cutting and breaking method with impeller
to prepare the bulk nano-scale bubbly flow pre-mixed hydrocarbon fuel. Methods including
ultrasonic cavitation, porous membrane permeation or pressure changes can also be used to
achieve the preparation of nano-scale bubble flow premixed hydrocarbon fuel.
6. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the gas-liquid separator I (12), the liquid level sensor (14)
and the bubble concentration sensor are integrated in the SDBFPF (9). The gas outlet of the
SDBFPF (9) is connected with an engine intake manifold (15), and the fuel outlet of the
SDBFPF (9) is connected with a gas-liquid separator II (10). The SDBFPF (9) stratifies bulk
phase nano-scale bubble flow premixed hydrocarbon fuel according to the bubble concentration
of air floatation, and sucks out the fuel with larger bubbles through the fuel return port for refinement to ensure that the nano-bubbles of the prepared fuel can meet the requirements of the target scale. The gas-liquid separator I(12) is installed on the top of the SDBFPF (9). It is used to separates the macro bubbles from the liquid phase of the hydrocarbon fuel, and supplies the mixture of air and fuel vapor to the engine for combustion through an intake manifold (15). The liquid level sensor (14) transmits the liquid level signal to the ECU (21) after measuring the liquid level. The bubble concentration sensor I is arranged near the fuel return port of the
SDBFPF (9) for transmitting the bubble concentration signal of the bulk phase nano-scale bubble
flow premixed hydrocarbon fuel to the ECU (21) for processing.
7. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the bubble concentration sensor I (13) and the bubble
concentration sensor 11 (19) adopts, but is not limited to, measurement the oxygen concentration
in hydrocarbon fuel to characterize the nano-scale bubble concentration. Zeta potential
measurement or other methods can also be used to characterize the nano-scale bubble
concentration of the hydrocarbon fuel.
8. The preparation and supply system for bubble flow premixed hydrocarbon fuel according to
Claim 1, can be characterized in that the high-pressure fuel rail (18) is provided with a bubble
concentration sensor 11(19) to measure the bubble concentration signal of the bulk phase nano
scale bubble flow premixed hydrocarbon fuel within the high-pressure fuel rail, which can be
used for determine the fuel supply cycle and also for fault diagnosis and analysis.
9. The control method for bubble flow premixed hydrocarbon fuel preparation and supply system
according to Claim 1, characterized by comprising the following steps.
Step 1. Judging whether that bulk phase nano-scale bubble flow premix hydrocarbon fuel needs
supplementary preparation according to the signal of the liquid level sensor (14) in the SDBFPF
(9).
Step 2. Judging whether the bulk nano-scale bubble flow premixed hydrocarbon fuel in the
SDBFPF (9) needs refinement or re-preparation according to the signal of a bubble concentration
sensor I (13) in the SDBFPF (9).
Step 3. Judging that cycle used for fuel supply and whether to refine the bulk phase nano-scale
bubble flow premixed hydrocarbon fuel in the high-pressure fuel rail (18) according to the
signals of the bubble concentration sensor I (13) and the bubble concentration sensor II (19).
Step 4. Waiting for the engine start signal and waiting for the rail pressure to be established.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104680A AU2021104680A4 (en) | 2021-07-28 | 2021-07-28 | Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control Method Thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021104680A AU2021104680A4 (en) | 2021-07-28 | 2021-07-28 | Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control Method Thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021104680A4 true AU2021104680A4 (en) | 2021-09-30 |
Family
ID=77857695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021104680A Ceased AU2021104680A4 (en) | 2021-07-28 | 2021-07-28 | Preparation and Supply System of Bubble Flow Premixed Hydrocarbon Fuel and Control Method Thereof |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021104680A4 (en) |
-
2021
- 2021-07-28 AU AU2021104680A patent/AU2021104680A4/en not_active Ceased
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