CN107923351A - Fuel feed system - Google Patents
Fuel feed system Download PDFInfo
- Publication number
- CN107923351A CN107923351A CN201680047991.6A CN201680047991A CN107923351A CN 107923351 A CN107923351 A CN 107923351A CN 201680047991 A CN201680047991 A CN 201680047991A CN 107923351 A CN107923351 A CN 107923351A
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- fuel
- liquid
- dme
- engine
- combination
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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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
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- 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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
- F02D19/082—Premixed fuels, i.e. emulsions or blends
- F02D19/085—Control based on the fuel type or composition
- F02D19/087—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The light oil as liquid fuel of storage in the DME and light oil case (90) as liquid gas fuel of storage in DME casees (190) can be supplied to internal combustion engine (150) by fuel feed system (100).Fuel feed system (100) possesses supply fuel system (20) and return fuel system (30).Supply fuel system (20) is mixed the DME and light oil that are sent out respectively from DME casees (190) and light oil case (90), and their fuel combination is supplied to internal combustion engine (150).Return fuel system (30) make in supply to the fuel combination of internal combustion engine (150) be not used in the engine (150) in burning a part of fuel combination return to DME casees (190) and light oil case (90) in DME casees (190).
Description
Cross-reference to related applications
The application is hereby incorporated its note based on Japanese patent application No. 2015-160527 filed in August in 2015 17 days
Carry content.
Technical field
A kind of this disclosure relates to fuel feed system that liquid gas fuel and liquid fuel are supplied to engine.
Background technology
Patent Document 1 discloses using as the dimethyl ether of liquid gas fuel (DME) and as the light of liquid fuel
Oil is supplied to the Fuel Control System of engine.In the Fuel Control System of patent document 1, at multiple positions of fuel system
It is provided with electronic control switch.Switch the flow path of fuel system, fuel control by using these multiple electronic control switch
A side in DME and light oil can be supplied to engine by system.
Present inventor is conceived to is supplied to engine by the fuel combination of liquid gas fuel and liquid fuel
Advantage.Such as in the case where supplying fuel combination, compared with the situation for being only supplied liquid fuel, from the smog of engine discharge
Measuring (Smoke) reduces.In addition, in the case where supplying fuel combination, compared with the situation for being only supplied liquid gas fuel, sending out
The leaked fuel that pump of motivation etc. produces reduces.
In patent document 1, the discharged pipe arrangement of return fuel being not used within the engine in burning passes through to starting
The pipe arrangement of machine supply light oil to be connected with light oil case.Therefore, if be supplied to after liquid gas fuel is mixed with liquid fuel
Engine, the then a part of fuel combination for becoming return fuel are possible to also return to light oil case via multiple pipe arrangements.In order to anti-
The standby this state of affairs, light oil case are had to the construction for being arranged to the vapour pressure for standing liquid gas fuel.
Prior art literature
Patent document
Patent document 1：No. 201687585 specification of Chinese utility model
The content of the invention
The purpose of the disclosure is to provide a kind of fuel feed system, that is, allows to fuel combination being supplied to engine,
Liquid fuel tank can not also be set to to stand the construction of the vapour pressure of liquid gas fuel.
According to a mode of the disclosure, fuel feed system is that one kind can be stored into engine gaseous fuelled case
Liquid gas fuel and liquid fuel tank in the fuel feed system of liquid fuel stored, possess：Fuel system is supplied, will
The liquid gas fuel and liquid fuel sent out respectively from gas fuel tank and liquid fuel tank are mixed, and mixing them
Close fuel and be supplied to engine；And return fuel system, make in supply to the fuel combination of engine in the engine
A part of fuel combination being not used in burning returns to the gas fuel tank in gas fuel tank and liquid fuel tank.
Supply to a part of fuel combination return being not used within the engine in burning in the fuel combination of engine
Gas fuel tank into gas fuel tank and liquid fuel tank.Therefore, liquid gas fuel does not return to liquid fuel tank.By
This, is even the fuel combination of liquid gas fuel and liquid fuel to be supplied to the fuel feed system of engine, liquid combustion
Hopper may not be the construction for the vapour pressure that can stand liquid gas fuel.
In addition, according to the other manner of the disclosure, it is set to be also equipped with the fuel feed system of mixed proportion control unit, this is mixed
Liquid gas fuel in the fuel combination that composition and division in a proportion example control unit is supplied to passing through from supply fuel system to engine is fired with liquid
The mixed proportion of material is adjusted.
In this way, in mode of a part of fuel combination back to gas fuel tank, in the fuel in gas fuel tank
The ratio of liquid gas fuel and liquid fuel gradually changes.But according to the control of mixed proportion control unit, even if gas fires
The mixed proportion of fuel in hopper changes, and the mixed proportion of the fuel combination supplied to internal combustion engine is also appropriately adjusted,
The value for deteriorating the emission level of exhaust gas can be stably maintained.Thus, can not only avoid setting liquid fuel tank
Into pressure-resistant construction, additionally it is possible to be well maintained the emission level of exhaust gas.
Brief description of the drawings
Above-mentioned purpose and other purposes, feature, advantage on the disclosure carry out following detailed by referring to accompanying drawing
Description, can become more apparent.
Fig. 1 is the integrally-built figure of the fuel feed system for the embodiment for representing the disclosure.
Fig. 2 is the figure of the details of functional block for representing to build in control device.
Fig. 3 is the flow chart for representing the processing by the processor implementation of control device.
Embodiment
The fuel feed system 100 of the embodiment based on the disclosure shown in Fig. 1 and internal combustion engine 150, DME casees 190
And the grade of light oil case 90 is equipped on vehicle together.The dimethyl ether (DME) that fuel feed system 100 will can store in DME casees 190
Mixed with the light oil stored in light oil case 90, and their fuel combination is supplied to internal combustion engine 150.
Internal combustion engine 150 is specifically diesel engine, is the multi-cylinder (example for the double fuel type that DME and light oil can be used as to fuel
Such as in-line four cylinder) engine.Internal combustion engine 150 is by the fuel sprayed from the direct injection injector 140 for being configured at each cylinder in each cylinder
It is compressed, can will be transformed to power by compressing come the thermal energy of the fuel to burn in each combustion chamber 151.In internal combustion engine
Supply pump 120, common rail (Common rail) 130, EGR (Exhaust Gas Recirculation are provided with 150：Exhaust gas
Recycling) system 160 and above-mentioned injector 140.
Supply pump 120 is, for example, plunger pump etc., is driven by internal combustion engine 150.Formed in the pump case of supply pump 120
There is compression chamber, fuel is flowed into the suction passage of compression chamber, the ejection flow path for making fuel be flowed out from compression chamber etc..Supply pump 120
The fuel combination supplied from fuel feed system 100 is carried out into shift reciprocately in compression chamber by using the power of internal combustion engine 150
Plunger pressurize, and to 130 pressurized delivered of common rail.
Leaked fuel outlet 122 and feed pressure sensor 123 are provided with supply pump 120.Leaked fuel is discharged
The leaked fuel leaked out from gap around plunger etc. is discharged to the outside of supply pump 120 by mouth 122.Feed pressure sensor
The pressure of the fuel combination to circulate in 123 pairs of suction passages in housing measures.
Common rail 130 is the tubular element formed by metal materials such as iron steel.Common rail 130 passes through fuel under high pressure pipe arrangement 121
To be connected with supply pump 120.Common rail 130 stores the fuel combination after pressurizeing at supply pump 120 in the state of pressure is maintained
Product.Common rail 130 is connected via distribution pipe arrangement 131 with each injector 140, and fuel combination is supplied to each injector 140.
Be provided with common rail 130 pressure regulator valve 132, rail pressure sensor (Rail pressure sensor) 133 and
Rail temperature sensor (Rail temperature sensor) 134.Fuel pressure of the pressure regulator valve 132 in common rail 130 exceedes rule
A part for the fuel combination of accumulation, is discharged to the outside of common rail 130 by valve opening in the case of fixed pressure upper limit.Rail pressure power passes
Sensor 133 measures the fuel pressure in common rail 130.Rail temperature sensor 134 carries out the fuel temperature in common rail 130
Measurement.
The fuel combination supplied by common rail 130 is supplied to each cylinder of internal combustion engine 150 by injector 140.Injector 140 is logical
The through hole for being inserted into the head for being formed at internal combustion engine 150 is crossed, spray orifice is exposed to combustion chamber 151.Injector 140 is based on from rear
The control signal that the control device 50 stated inputs, sprays fuel combination from the spray orifice exposed to combustion chamber 151.
Injector 140 has residual fuel discharge unit 141.Residual fuel discharge unit 141 will produce in injector 140
Residual fuel is discharged to the outside of injector 140.The residual fuel of injector 140 is from the fuel combination that common rail 130 supplies
Not from spray orifice injection fuel.Specifically, the fuel and process discharged from the back pressure chamber of injector 140 are formed at slip
Leaked fuel that partial gap leaks out etc. becomes residual fuel.
Egr system 160 includes the EGR pipe for being attached the exhaust pipe of internal combustion engine 150 and air intake duct and is arranged at EGR
EGR valve of pipe etc..Egr system 160 makes a part for the exhaust gas to circulate in exhaust pipe be back to air intake duct.EGR valve can be right
The flow of the exhaust gas to flow back to air intake duct is adjusted.
In internal combustion engine 150, as the sensor of the state for detecting the internal combustion engine (engine), cylinder internal pressure is provided with
Sensor 152, cooling-water temperature sensor 153 and crankshaft speed sensor 156 etc..Pressure of the pressure sensor 152 to combustion chamber 151 in cylinder
Power measures.Cooling-water temperature sensor 153 to the temperature of cooling water that is flowed in the cooling water channel being formed at around each cylinder into
Row measurement.Crankshaft speed sensor 156 is detected the angular speed of the crank axle 155 of the output shaft as internal combustion engine 150.
DME casees 190 can using a kind of DME as liquid gas fuel as to the fuel that internal combustion engine 150 supplies into
Row storage.DME in DME casees 190 with being pressurized with the corresponding pressure of fuel vapo(u)r pressure by being liquefied.Therefore, DME casees 190
It is set as standing the pressure-resistant construction of the vapour pressure of DME.The volume of DME casees 190 is more than the volume of light oil case 90, specifically
Say, be defined as two times of light oil case 90 or so.Charging port 191 is provided with DME casees 190.DME fuel chargers
(Dispenser) applying nozzle is connected to charging port 191 with airtight conditions, thus, it is possible to realize from DME fuel chargers to DME casees
The fuel feeding of 190 DME.
Light oil case 90 can be carried out using a kind of light oil as liquid fuel as the fuel supplied to internal combustion engine 150
Storage.Light oil case 90 is not set at the pressure-resistant construction as DME casees 190.Oil-feed port 91 and sky are provided with light oil case 90
Conductance enters valve 92.Oil-feed port 91 is inserted into by the fuel nozzle of fueller, can be realized from fueller to light oil case 90
Light oil fuel feeding.Air imports valve 92 can be inside from the outside of light oil case 90 while preventing rainwater, foreign matter etc. to be mixed into
Portion imports air.Therefore, even if the light oil in light oil case 90 is consumed, the pressure of the inside of light oil case 90 is also maintained defined
Pressure.
Then, the structure of fuel feed system 100 is illustrated.Fuel feed system 100 includes supply fuel system 20, returns
Fuel system 30, DME charging pumps 110, light oil charging pump 10, multiple sensors and control device 50 etc..
Supply fuel system 20 is mixed the DME and light oil that are each sent out from light oil case 90 and DME casees 190, and will
Their fuel combination is supplied to internal combustion engine 150.Supplying fuel system 20 includes liquid fuel pipe arrangement 21, gaseous fuel pipe arrangement
23rd, fuel combination pipe arrangement 26 etc..Liquid fuel pipe arrangement 21 is connected in light oil case 90 with light oil charging pump 10, and formation makes light oil case
The liquid fuel supply road 21a of 90 light oil circulation.Being provided with liquid fuel within pipe arrangement 21 prevents light oil to light oil case 90
The non-return valve 22 of adverse current.
Gaseous fuel pipe arrangement 23 is connected in DME casees 190 with DME charging pumps 110, and formation makes the DME of DME casees 190 circulate
Gaseous fuel supply road 23a.The non-return valve for preventing DME to the adverse current of DME casees 190 is provided with gaseous fuel pipe arrangement 23
24.Gaseous fuel pipe arrangement 23 is connected with liquid fuel pipe arrangement 21.The connecting portion of gaseous fuel pipe arrangement 23 and liquid fuel pipe arrangement 21
Divide the merging part 25 for forming liquid fuel supply road 21a and gaseous fuel supply road 23a interflow.
Fuel combination pipe arrangement 26 is connected with the supply pump 120 of internal combustion engine 150.Fuel combination pipe arrangement 26, which is formed, makes fuel combination
The fuel combination supply road 26a to circulate from merging part 25 to internal combustion engine 150.In the centre of fuel combination pipe arrangement 26 and in merging part
Common fuel filter 27 is provided between 25 and supply pump 120.Common fuel filter 27 possesses to the pressure-resistant of feed pressure
Property.Common fuel filter 27 can be removed in the state of feed pressure effect DME and light oil each in mixed foreign matter.
Return fuel system 30 makes being not used in the internal combustion engine in burning in supply to the fuel combination of internal combustion engine 150
A part of fuel (following for return to fuel) return to DME casees 190 in DME casees 190 and light oil case 90.Return fuel system
30 only return to fuel to DME casees 190, do not return to fuel to light oil case 90.Return fuel system 30 includes injector
Discharge fuel distribution tube 33, pump discharge fuel distribution tube 35 and return to pipe arrangement 31 etc..
Injector discharge fuel distribution tube 33, which is connected to the residual fuel discharge unit 141 of each injector 140 and is arranged at, to be returned
Return the merging part 34 of pipe arrangement 31.Injector discharge fuel distribution tube 33 forms the injection made from the discharge of each residual fuel discharge unit 141
The residual fuel of device 140 is passed to the fuel flow path for returning to pipe arrangement 31.
Pump discharge fuel distribution tube 35 is connected to the leaked fuel outlet 122 of supply pump 120 and is arranged at return pipe arrangement
31 merging part 36.Pump discharge fuel distribution tube 35 forms the leakage combustion for the supply pump 120 for making to discharge from leaked fuel outlet 122
Stream leads to the fuel flow path for returning to pipe arrangement 31.
Returning to pipe arrangement 31 and being formed makes the fuel combination from the discharge of common rail 130, injector 140 and supply pump 120 only circulate
To the return fuel flow path 31a of DME casees 190.The intake section 32a for returning to pipe arrangement 31 is connected with the pressure regulator valve 132 of common rail 130.
The exit portion 32b for returning to pipe arrangement 31 is only connected with the DME casees 190 in two fuel tanks.Set returning to the middle of pipe arrangement 31
There is the merging part 34,36 being connected with each discharge fuel distribution tube 33,35.In fuel flow path 31a is returned, pass through pressure regulation except flowing into
The valve opening of valve 132 and beyond the fuel combination that common rail 130 is discharged, also flow into each discharge fuel distribution tube 33,35 and circulate
Leaked fuel etc..Returning to fuel flow path 31a makes DME and light oil this two side be passed to DME casees 190.Therefore, store in DME casees 190
Deposit DME and light oil this two side.On the other hand, DME and light oil are not back to light oil case 90.
DME charging pumps 110 are arranged in the electrodynamic pump of the inside of DME casees 190.DME charging pumps 110 use electro-motor
Power sprays to suck in DME casees 190 DME stored to internal combustion engine 150.Feed pressure is applied with by DME charging pumps 110
DME is by liquid fuel supply road 21a and fuel combination pipe arrangement 26 is pressurized is delivered to supply pump 120.DME charging pumps 110
Also the ejection of fuel can be carried out in the case of light oil is mixed with DME.For DME charging pumps 110, filled using from control
The control signal for putting 50 inputs is controlled the rotating speed of electro-motor.The feed pressure of DME is applied to by DME charging pumps 110
It is set to the pressure (such as 3MPa or so) of state for making DME be able to maintain that liquid.
Light oil charging pump 10 is arranged in the electrodynamic pump of the inside of light oil case 90.Light oil charging pump 10 uses electro-motor
Power sprays to suck in light oil case 90 light oil stored to internal combustion engine 150.Feed pressure is applied with by light oil charging pump 10
Light oil supply that road 21a and fuel combination pipe arrangement 26 are pressurized to be delivered to supply pump 120 by liquid fuel.It is fed for light oil
Pump 10, is controlled the rotating speed of electro-motor using the control signal inputted from control device 50.Applied by light oil charging pump 10
The feed pressure for being added to light oil is consistent with the feed pressure that DME etc. is applied to by DME charging pumps 110.
In fuel feed system 100, light oil temperature sensor 71, DME temperature sensors 72, each charging pump are provided with
Speed probe 73,74, DME pressure sensors 76, light oil fuel meter 78 and DME fuel gages 79.These sensors and control
Device 50 is electrically connected, and testing result is exported to control device 50.
Light oil temperature sensor 71 is installed on the bottom wall of light oil case 90.Light oil temperature sensor 71 for example possesses according to temperature
Change thermistor of resistance value etc..The temperature of light oil of the light oil temperature sensor 71 into the output of control device 50 and light oil case 90
Spend corresponding electric signal.DME temperature sensors 72 are installed on the bottom wall of DME casees 190.In the same manner as light oil temperature sensor 71,
DME temperature sensors 72 are such as possessing thermistor.DME temperature sensors 72 are into the output of control device 50 and DME casees 190
DME the corresponding electric signal of temperature.
Speed probe 73 is arranged at light oil charging pump 10.Speed probe 73 is fed to the output of control device 50 with light oil
The corresponding electric signal of rotating speed of pump 10.Speed probe 74 is arranged at DME charging pumps 110.Speed probe 74 is to control device
50 output electric signals corresponding with the rotating speed of DME charging pumps 110.
DME pressure sensors 76 are installed on the bottom wall of DME casees 190 together with DME temperature sensors 72.DME pressure sensings
Device 76 possesses the metal diaphragm portion for receiving pressure and will be electric signal due to the deformation transformation of the diaphragm portion of pressure
Deformeter etc..DME pressure sensors 76 export electric signal corresponding with the fuel pressure in DME casees 190 to control device 50.
Light oil fuel meter 78 and DME fuel gages 79 are to follow liquid by using hall effect devices or variable resistance detection
Face and the position of buoy that moves up and down measure the sensor of the surplus of the fuel in each case 90,190.Light oil fuel meter 78
In in light oil case 90, the wall of light oil charging pump 10 or light oil case 90 is installed on.By light oil fuel meter 78 is measuring and light oil
The corresponding measured value of surplus of light oil in case 90 is as acquired in electric signal controlled device 50.DME fuel gages 79 are located at DME
In case 190, the wall of DME charging pumps 110 or DME casees 190 is installed on.Measured by DME fuel gages 79 with DME casees 190
DME the corresponding measured value of surplus as acquired in electric signal controlled device 50.
Control device 50 is to each of the injector 140 and supply pump 120 of internal combustion engine 150 and fuel feed system 100
The control unit that charging pump 10,110 etc. is synthetically controlled.Control device 50 is with processor 55, RAM 56, quick flashing
The microcomputer of the grade of memory 57 is formed for main body.In control device 50, except input unit 51 and output section 52 with
Outside, power circuit, input signal processing circuit, control signal process circuit, telecommunication circuit etc. are additionally provided with.In addition, in Fig. 1
Eliminate the diagram that is electrically connected of the control device 50 with each structure.
Processor 55 is able to carry out the various calculation process related with the program stored in flash memory 57.RAM 56 makees
Operating area for the calculation process of processor 55 plays function.Flash memory 57 is the information such as save routine and mapping graph
Non- transitionality tangible storage media (Non-transition entities storage).Input unit 51 is with being arranged at internal combustion engine
150 connect with the big quantity sensor of fuel feed system 100.By input signal processing circuit to being input to input from each sensor
The signal in portion 51 is handled.Output section 52 and each injector 140, supply pump 120, each charging pump 10,110 etc. are connected.By controlling
The control signal of signal processing circuit evolving is exported from output section 52 to each actuator.
More than control device 50 by the program in processor 55 execution by the jet controling part 61 shown in Fig. 2,
Fuel residual amount acquisition unit 62, EGR control units 63, contribution calcutation portion 66, mixed proportion configuration part 67 and pump control unit 68
Etc. being configured to functional block.In the following, illustrate the details of each functional block based on Fig. 1 and Fig. 2.
The emitted dose of fuel combination of the jet controling part 61 to being sprayed from each injector 140 is controlled.Jet controling part
The mixed proportion adjustment injection period of 61 DME and light oil in fuel combination, thus enables that emitted dose increases and decreases.Specifically
Say, the operating quantity of jet controling part 61 based on accelerator pedal etc. come set to internal combustion engine 150 requirement torque.Jet controling part 61
Can be with reference to the control mapping graph for defining DME corresponding with requiring torque and the respective emitted dose of light oil.Jet controling part 61
The information such as the mixed proportion based on EGR rate, coolant water temperature and fuel combination and two control mapping graphs are set to each spray
The pulsewidth for the control signal that emitter 140 exports so that produced to the supply of combustion chamber 151 and require the mixing of the amount needed for torque to fire
Material.
Fuel residual amount acquisition unit 62 obtains each fuel residual amount of light oil case 90 and DME casees 190.62 base of fuel residual amount acquisition unit
The surplus of remaining light oil in light oil case 90 is calculated in the measured value exported from light oil fuel meter 78.Fuel residual amount acquisition unit 62
The surplus of remaining DME in DME casees 190 is calculated based on the measured value exported from DME fuel gages 79.
EGR control units 63 control the aperture of the EGR valve in egr system 160 according to the operating condition of internal combustion engine 150.EGR is controlled
Portion 63 processed sets EGR rate so that the combustion state of internal combustion engine 150 is maintained desired state.EGR control units 63 control EGR valve
Aperture to realize set EGR rate, thus the amount of the discharge gas to flowing back to suction system is adjusted.
Contribution calcutation portion 66 calculates the mixed proportion of the DME and light oil in fuel combination.It is mixed in the following description
Composition and division in a proportion example is the volume ratio of the DME and light oil in fuel combination.Contribution calcutation portion 66 can utilize multiple methods described later
Calculate the mixed proportion of fuel combination.Contribution calcutation portion 66 can improve the meter of mixed proportion by and with multiple methods
Calculate precision.
Mixed proportion configuration part 67 sets the target mix ratio example required by internal combustion engine 150.67 energy of mixed proportion configuration part
The surplus sets target mixed proportion of enough surpluses based on the light oil in light oil case 90 and the DME in DME casees 190 so that tieing up
Holding makes the endurance distance of vehicle most long while the operation using the internal combustion engine 150 of fuel combination.Such as in light oil case 90 and DME
Case 190 each in each filling fuels in the case of at most, can be according to the volumetric ratio of each case 90,190 come by target mix ratio
The reference value of example is about 2:1.In addition, mixed proportion configuration part 67 can be dropped in the case where the surplus of DME is changed into a small amount of
The ratio of DME in low fuel combination.
Control unit 68 is pumped by being controlled together to light oil charging pump 10 and DME charging pumps 110, to internal combustion engine 150
The mixed proportion of DME and light oil in the fuel combination of supply are adjusted.Pump control unit 68 and carry out light oil charging pump 10 and DME
Each feedback control for spraying flow in charging pump 110 so that the mixed proportion calculated by contribution calcutation portion 66 become by
The target mix ratio example that mixed proportion configuration part 67 is set.In addition, pump control unit 68 is with the DME fuel in target mix ratio example
Ratio increase, controlled by the coordination of each charging pump 10,110, can be into exercising fuel combination that inside combustion engine 150 supplies
The increased control of flow.This is because since the energy density of DME is less than the energy density of light oil, the DME's in fuel combination
Ratio is higher, then the energy density of fuel combination is lower.
The details for the charging pump control process implemented on the pump control unit 68 more than, flow chart and ginseng based on Fig. 3
Illustrated according to Fig. 1, Fig. 2.The igniter that charging pump control process is based upon vehicle is switched to on-state and carrys out internal combustion
Machine 150 be activated this case and by control device 50 pump control unit 68 repeatedly.Pump control unit 68 is persistently supplied
Material pump control process, untill internal combustion engine 150 stops.
In S101, the newest target mix ratio example set by mixed proportion configuration part 67 is read in, into S102.
In S102, the detected value of the mixed proportion calculated by contribution calcutation portion 66 is read in, into S103.
In S103, whether the detected value for the mixed proportion for judging to read in S102 is departing from the mesh read in S101
Scale value.Specifically, in S103, judge whether the detected value of mixed proportion and the difference of desired value have exceeded threshold set in advance
Value.In S103, in the case where the difference of detected value and desired value is below threshold value, it is considered as mixed proportion and is controlled according to target
System, makes each charging pump 10,110 continue current work.On the other hand, in S103, exceed in the difference of detected value and desired value
In the case of threshold value, into S104.
In S104, in order to make mixed proportion implement to be adjusted the rotating speed of each charging pump 10,110 close to desired value
Processing.Specifically, in the case where the mixed proportion of light oil is less than desired value, the rotating speed of light oil charging pump 10 becomes higher,
In the case that the mixed proportion of DME is less than desired value, the rotating speed of DME charging pumps 110 becomes higher.Pass through feedback control as described above
System, the mixed proportion of the fuel combination supplied to internal combustion engine 150 follow target mix ratio example.
Then, on the details for the detection method of mixed proportion implemented by contribution calcutation portion 66, carry out in order
Explanation.
<Low pressure detection method>
Contribution calcutation portion 66 can be according in the low pressure section detection from each case 90,190 to 120 entrance of supply pump
Information etc. calculates mixed proportion.In this low pressure detection method, contribution calcutation portion 66 estimates to spray from light oil charging pump 10
Light oil flow and from DME charging pumps 110 spray ejection fuel flow and mixed proportion.Then, contribution calcutation
It is mixed in the fuel combination that portion 66 can be supplied based on the contribution calcutation of each fuel flow rate and ejection fuel to internal combustion engine 150
Composition and division in a proportion example.
It is described in detail, the efficiency of light oil charging pump 10 changes according to fuel temperature, on the other hand, if fuel
Temperature is certain, then substantially maintains same value.Therefore, contribution calcutation portion 66 can be based on being examined by light oil temperature sensor 71
The light oil temperature of survey, the rotating speed of the light oil charging pump 10 detected by speed probe 73 and examined by feed pressure sensor 123
The ejection flow of the feed pressure estimation light oil charging pump 10 of survey.
In addition, if feed pressure is maintained certain, then contribution calcutation portion 66 can pressurize according to from supply pump 120
The ejection flow of the flow of the fuel under high pressure of conveying and the Difference Calculation DME charging pumps 110 of the ejection flow of light oil charging pump 10.
The flow of fuel under high pressure is roughly the same with the fuel quantity that time per unit is sprayed from injector 140.Contribution calcutation portion 66 is
The emitted dose of injector 140 is calculated, the high pressure in common rail 130 is obtained from rail pressure sensor 133 and rail temperature sensor 134
The pressure and temperature of fuel, and obtain the pulsewidth of the control signal set by jet controling part 61.Contribution calcutation portion 66
The flow of fuel under high pressure can be estimated based on the emitted dose calculated, and then can estimate the ejection flow of DME charging pumps 110.
Here, the efficiency of DME charging pumps 110 changes according to the ratio for the light oil being mixed into DME.This is because from DME
The fuel quantity of the time per unit of gap exudation inside charging pump 110 increases and decreases according to the viscosity of fuel combination.Mixed proportion
Calculating part 66 obtain the fuel temperature detected by DME temperature sensors 72, the fuel pressure detected by DME pressure sensors 76 with
And the rotating speed of the DME charging pumps 110 detected by speed probe 74.Contribution calcutation portion 66 can be based on these fuel temperature
Degree, fuel pressure and the ejection flow rate calculation of operating condition information and the DME charging pumps 110 estimated as rotating speed are current
DME charging pumps 110 efficiency.
Contribution calcutation portion 66 be previously stored with respectively for DME and light oil represent fuel temperature, fuel pressure and
Two efficiency mapping graphs of the correlation between operating condition as rotating speed and the efficiency of pump.Contribution calcutation portion 66 can
By by the operating condition of current DME charging pumps 110 and efficiency compared with two efficiency mapping graphs, it is current to estimate
Spray the mixed proportion of fuel.As a result, contribution calcutation portion 66 can be derived that the DME that is sprayed from DME charging pumps 110 and light
The respective flow of oil.Thus, contribution calcutation portion 66 can obtain to supply pump 120 supply fuel combination in DME with
The mixed proportion of light oil.
<High pressure detection method>
Contribution calcutation portion 66 can be detected according in the high pressure section that each injector 140 is exported to from supply pump 120
Information calculate mixed proportion.In this high pressure detection method, contribution calcutation portion 66 can be based on supplying to internal combustion engine 150
Fuel combination volume modulus E calculate mixed proportion.This is because the volume modulus E of fuel combination is with DME
Ratio increase and reduce.
Be described in detail, by the fuel injection of injector 140 and the pressure change, elta P that is produced in high pressure section with
Between change in volume Δ V there are following formulas 1 shown in correlation.
Δ P=E × Δ V/V (1)
In above-mentioned formula 1, V is the volume in high pressure section, is the specific value prestored.Specifically, higher-pressure region
Between volume V be the volume for the fuel flow path for being formed at each injector 140, distribute the volume of pipe arrangement 131, the volume of common rail 130,
The summation of the volume of the volume of fuel under high pressure pipe arrangement 121 and the ejection flow path of supply pump 120.
It is opposite with fuel temperature and pressure that contribution calcutation portion 66 for DME and light oil is previously stored with expression respectively
Two relevance map figures of the value of volume modulus.Contribution calcutation portion 66 can be according to by rail pressure sensor 133
The change of pressure in the common rail 130 of detection, which obtains, passes through pressure change, elta P caused by fuel injection.In addition, mixed proportion
Calculating part 66 can be based on the fuel combination detected by each sensor 133,134 pressure and temperature and by jet controling part 61
The pulsewidth of the control signal of setting, the emitted dose for obtaining injector 140 are the change in volume Δ V produced in high pressure section.
By deforming above-mentioned formula 1, shown in volume modulus E formulas 2 described as follows.
E=Δ P/ Δs V × V (2)
Using above-mentioned formula 2, contribution calcutation portion 66 calculates current volume modulus E.Then, contribution calcutation
Portion 66 can be drawn in the current fuel detected by rail temperature sensor 134 according to the two relevance map figures prestored
At a temperature of so that as calculated volume modulus E mixed proportion.
<Torque test method>
As Torque test method, contribution calcutation portion 66 being capable of the body based on the fuel combination supplied to combustion chamber 151
Product and the burning by the fuel combination supplied are and the correlation between the torque that exports, to calculate mixed proportion.In detail
Illustrate, the caloric value of DME and the respective energy density, that is, per unit mass of light oil is predetermined.Therefore, it is possible to pin
It is prespecified to DME and light oil difference to represent according to the fuel mass, injection timing, EGR rate and cold supplied to combustion chamber 151
But the torque map figure of the value for the shaft torque that water temperature etc. can export.In addition, even in the situation for the fuel for having supplied phase homogenous quantities
Under, the more high then shaft torque of EGR rate is lower.Similarly, coolant water temperature is lower, then shaft torque is lower.
Contribution calcutation portion 66 can obtain the emitted dose of injector 140 as illustrated in high pressure detection method
(volume).Contribution calcutation portion 66 can calculate DME and light oil be each based on the fuel temperature and fuel pressure in common rail 130
From density.It can be estimated bent according to the change of the angular speed detected by crankshaft speed sensor 156 in contribution calcutation portion 66
The shaft torque of arbor 155.Contribution calcutation portion 66 can be with reference to two prespecified torque map figures, and drawing to obtain
The matched mixed proportion of the torque value of the emitted dose of fuel combination above, each density of DME and light oil and reality.
<Cylinder internal pressure detection method>
As cylinder internal pressure detection method, contribution calcutation portion 66 can calculate mixing ratio based on the light-off time of fuel combination
Example.Light-off time be in combustion period once since start to combustion chamber 151 spray fuel combination injection timing
Time untill the fuel combination ignition sprayed.
It is described in detail, the Cetane number of DME is higher than the Cetane number of light oil.Therefore, DME in fuel combination
Mixed proportion more increases, then ignition timing is more early.Therefore, it is possible to according to the in-cylinder pressure before ignition and cylinder temperature and EGR
The light-off time mapping graph of correlation between the prespecified expression DME such as rate and the mixed proportion and light-off time of light oil.
Contribution calcutation portion 66 can be obtained in rectangular-shaped pulse in the control signal exported to each injector 140
The timing risen is used as injection and starts timing.In addition, contribution calcutation portion 66 can be according to by pressure sensor in cylinder 152
The change of the cylinder internal pressure of measurement, detection ignition timing.Contribution calcutation portion 66 is calculated is timed to ignition timing since injection
Untill light-off time, mixing ratio can be drawn based on the light-off time and prespecified light-off time mapping graph calculated
Example.
In the present embodiment illustrated so far, unconsumed return fuel is returned only to DME in internal combustion engine 150
DME casees 190 in case 190 and light oil case 90.Therefore, DME does not return to light oil case 90.Even according to the above, will make DME and
The fuel combination that light oil mixes is supplied to the fuel feed system 100 of internal combustion engine 150, and light oil case 90 may not be can
Stand the construction of the high vapour pressure of DME.
As a result, light oil case 90 can be the fuel tank combined with the fuel feed system that light oil is only supplied to internal combustion engine
Substantially the same structure.Therefore, it is possible to suppress the cost of light oil case 90.
In addition, in the present embodiment, return pipe arrangement 31 exit portion 32b be only connected with DME casees 190, not with
Supply the connection such as fuel distribution tube 21, fuel distribution tube 23 of fuel system 20.Therefore, it is possible to reliably prevent DME from flowing into light oil case
90.As a result, light oil case 90 may not be the construction for the vapour pressure that can stand DME.Also, also no longer occur opening confession
Because of the state of affairs that pressure caused by the gasification of DME is released quickly during hydraulic fluid port 91.
In addition, in the present embodiment, light oil case 90 and DME casees 190 this two sides are equipped on vehicle, therefore even in vehicle
Current location nearby there is no DME oil pump station in the case of, can also avoid the state of affairs that cannot be exercised due to deficency body.
In addition, if as in the present embodiment from fuel feed system 100 supply fuel combination mode, then only by with
The corresponding supply pump 120 of 1 system, common rail 130 and injector 140 etc. just can supply two kinds of fuel to combustion chamber 151.
Also, compared with the mode with DME and light oil switching are supplied, fuel combination is supplied as the present embodiment
The mode increase, the reduction of torque, the deterioration of specific fuel consumption etc. that are not easy to cause a fog.In detail, in order to which the output phase is same
Torque, the emitted dose of DME is necessary to ensure that about 1.9 times of the emitted dose of light oil.Therefore, it is set to by the spray orifice shape of injector
In the case of shape suitable for the injection of DME, it is difficult to realize be atomized in the injection of light oil, causes smog too greatly to be discharged.Separately
Outside, in the case where the spray orifice shape of injector to be set to the shape suitable for the injection of light oil, due to the deficiency of fuel feed
And torque is caused to reduce.In addition, due to injection period is elongated and specific fuel consumption easily deteriorates.Supply the combustion of fuel combination
The shortcomings that material feed system 100 can prevent as described above.
In addition, in the case that mixing 2 is burnt into the DME of left and right such as in light oil, burn with only making light oil
Situation is compared, and the discharge rate of smog is reduced to half or so.This is because the oxygen atom included in the molecule of DME passes through burning
And combined with carbon atom, thus play the effect for suppressing to produce smog.Further, since the viscosity of DME is less than light oil, only by DME
The discharge rate of the leaked fuel of the supply pump of pressurized delivered reaches 10 times for only by the supply pump of light oil pressurized delivered
More than.But by the way that to DME mixing light oil, due to the viscosity of light oil, the discharge rate of leaked fuel reduces.As a result, realize
The efficiency of internal combustion engine 150 improves.In addition, in the mode of supply fuel combination, lubricating action is played by light oil, thus it is real
The additive for the mechanical wear for being used to prevent supply pump etc. need not be added in matter to DME.
Here, it is returned only to returning to fuel as in the present embodiment in the mode of DME casees 190, in DME casees 190
The ratio of DME and light oil in fuel gradually change.Therefore, the per unit volume of the fuel combination supplied to internal combustion engine 150
Heat is produced also to gradually change.As a result, may because the torque of internal combustion engine 150 increase and decrease cause driver not feel well with
And deterioration of exhaust emissions (Emissions) etc..
But in the present embodiment, the feedback control for carrying out pump control unit 68 causes mixed proportion in fuel combination
As target mix ratio example.As a result, even if the mixed proportion of the DME and light oil in DME casees 190 change, to supply pump
The mixed proportion of the fuel combination of 120 supplies is also appropriately adjusted, and can stably be maintained.Thus, in the present embodiment, no
It can only avoid light oil case 90 being arranged to pressure-resistant construction, additionally it is possible to reliably prevent that driver from not feeling well the state of affairs of sense, and
Also the emission level of exhaust gas can be well maintained.
Also, in the present embodiment, contribution calcutation portion 66 is by using above-mentioned multiple detection methods, even if not straight
The mixed proportion of measurement fuel combination is connect, can also obtain accurate mixed proportion.In addition, above-mentioned multiple inspections are used in
Each measured value of survey method is can be measured by the sensor group usually set in internal combustion engine 150 and fuel feed system 100
Value.Therefore, fuel feed system 100 is without with the addition for being used to obtain the special sensor of mixed proportion etc., it becomes possible to
Accurately obtain the mixed proportion of fuel combination.
In addition, in the present embodiment, with per unit volume the mixed proportion for producing the few DME of heat increasing
Add, pump control unit 68 can increase the flow of the fuel combination supplied to internal combustion engine 150.In the present embodiment, gaseous fuel
It is substantially the same to supply the pressure of road 23a and liquid fuel supply road 21a, therefore pumps control unit 68 by into exercising each charging pump
10th, the control that 110 rotating speed improves, increases the quantity delivered of fuel combination.Control more than, mixes even in changing
In the case of ratio, it can also prevent from being reduced by the torque that internal combustion engine 150 produces.
In addition, in the present embodiment, mixed proportion configuration part 67 can according to light oil case 90 and DME casees 190 it is each more than
Amount adjustment target mix ratio example.Control more than, to avoid the mode for only using up the side in DME and light oil, maintains
Utilize the operation of the internal combustion engine 150 of fuel combination.As a result, it is possible to obtain to be realized by using fuel combination to greatest extent
Above advantages, and the endurance distance of vehicle can be extended.
Also, the capacity of the DME casees 190 for producing the few DME of heat of per unit volume in the present embodiment, will be stored
Ensuring must be bigger than the capacity of light oil case 90.According to this structure, fuel feed system 100 can will utilize fuel combination to make interior
The time that combustion engine 150 is run ensures long.
In addition, in the present embodiment, the common fuel filter 27 for being arranged at fuel combination pipe arrangement 26 is removed and mixed
Mixed foreign matter in fuel.According to this structure, with liquid fuel within pipe arrangement 21 and gaseous fuel pipe arrangement 23 each in set
Fuel filter is compared, and can simplify the construction of supply fuel system 20.
Also, valve 92 in the present embodiment, is imported by air to allow importing of the air into light oil case 90.Cause
This, even not only DME is not returned, light oil also non-return structure, the internal pressure of light oil case 90 will not be with to internal combustion engine
150 fuel is supplied and reduced, and substantially can definitely be maintained.As above, supplied by the maintenance of the internal pressure in light oil case 90, light oil
Material pump 10 can reliably suck the light oil in light oil case 90.As a result, the fuel quantity from 10 pressurized delivered of light oil charging pump is steady
Fixedization, and then the mixed proportion in fuel combination can also stabilize.As above, air is set to import valve 92 in light oil case 90
Structure can reliably contribute to mixed proportion in the fuel feed system 100 that fuel combination is supplied to internal combustion engine 150
Stabilize.
In addition, in the present embodiment, light oil charging pump 10 equivalent to " liquid fuel feed pump ", pump control unit 68 equivalent to
" mixed proportion control unit ", for light oil case 90 equivalent to " liquid fuel tank ", air imports valve 92 equivalent to " air introduction part ".Separately
Outside, DME charging pumps 110 are equivalent to " liquid gas fuel pump ", and DME casees 190 are equivalent to " gas fuel tank ".
(other embodiment)
Be explained above the embodiment based on the disclosure, but the disclosure be not limited to the above embodiment come into
Row is explained, various embodiments and combination are can be applied in the range of the objective of the disclosure is not departed from.
In the above-described embodiment, light oil charging pump 10 and DME charging pumps 110 are contained in light oil case 90 and DME casees respectively
190 inside.But light oil charging pump and DEM charging pumps can also be respectively arranged at the outside of light oil case and DME casees.At this
In the mode of sample, it is desirable to which light oil temperature sensor and DME temperature sensors are configured at the suction inlet of each supply pump.In addition,
The sensor of the temperature in measurement high pressure section may not be rail temperature sensor 134 or be arranged at injector 140
Temperature sensor.
In the above-described embodiment, the mixed proportion of DME and light oil is with 2:On the basis of 1.But as the mixing ratio of benchmark
Example can be changed suitably, such as can also be set as 1:1 etc..Also, liquid gas fuel is not limited to DME or LPG
(Liquid Petroleum Gas：Liquefied petroleum gas) etc..Similarly, liquid fuel is not limited to light oil or gasoline
Deng.
In the above-described embodiment, estimated according to the evolutionary mode of the angular speed measured by crankshaft speed sensor 156
The shaft torque of crank axle 155.In however, it can be that the sensor for directly measuring the shaft torque produced in crank axle is arranged at
Combustion engine.
In the above-described embodiment, the mixed proportion of the fuel combination supplied to internal combustion engine is detected, into the enforcement detected value
Close to the feedback control of desired value.But it is also possible to this feedback control is not implemented.It is such as mixed in fuel combination is not detected
In the mode of composition and division in a proportion example, pump control unit can also come only into the control for the rotating speed increase and decrease for exercising each charging pump in torque as requested.
In the above-described embodiment, the capacity of DME casees 190 is more than the capacity of light oil case 90.But each propellant capacity
Can suitably it change.Also, the gas fuel tank of store liquefied gas fluid fuel can also set multiple.Return in this mode
Pipe connection is not connected at least one party of gas fuel tank with light oil case.If this structure, even if gas fuel tank
It is multiple, DME will not be back to light oil case.
In the above-described embodiment, the common fuel filter 27 of fuel combination pipe arrangement 26 is arranged at from by liquid fuel
Supply road 21a and the fuel of gaseous fuel supply road 23a conveyings remove foreign matter.But this fuel filter can also be distinguished
It is arranged at liquid fuel pipe arrangement and gaseous fuel pipe arrangement.Also, can also be in addition to common fuel filter, also respectively in liquid
Fluid fuel pipe arrangement and gaseous fuel pipe arrangement set fuel filter.
The function of being provided by the control device of the above embodiment is either perform the work(of the processor of regulated procedure
Energy block, or can also be realized by dedicated integrated circuit.Alternatively, can also by hardware and software unlike those described above or it
Combination each function is provided.
In the above-described embodiment, illustrate for the disclosure to be applied to the combustion to the internal combustion engine supply fuel for being equipped on vehicle
Expect the example of feed system.It is however not limited to vehicle-mounted internal combustion engine, the disclosure can also be applied to being equipped on ship, railway carriage
And aircraft etc. internal combustion engine or external-combustion engine supply fuel fuel feed system.Also, the disclosure can also be applied to
Supply the fuel feed system of the fuel consumed in the internal combustion engine or external-combustion engine of power generation.
The disclosure is described according to embodiment, it should be understood that the disclosure is not limited to the embodiment, construction.The disclosure
Further include various modifications example, the deformation in equivalency range.In addition, various combinations, mode and in these combinations, in modes
Other combinations, mode only comprising a key element or more than it or below it are also included within the category of the disclosure, thought range
It is interior.
Claims (14)
1. a kind of fuel feed system, the liquid gas of storage can fire into engine (150) gaseous fuelled case (190)
The liquid fuel of storage, possesses in material and liquid fuel tank (90)：
Supply fuel system (20), the liquid gas fuel that will be sent out respectively from the gas fuel tank and the liquid fuel tank
Mixed with liquid fuel, and their fuel combination is supplied to the engine；And
Return fuel system (30), makes being not used in the engine in burning in supply to the fuel combination of the engine
A part of fuel combination return to the gas fuel tank and the liquid fuel tank in the gas fuel tank.
2. fuel feed system according to claim 1, wherein,
Be also equipped with mixed proportion control unit (68), the mixed proportion control unit (68) to by the supply fuel system to described
The mixed proportion of liquid gas fuel and liquid fuel in the fuel combination of engine supply is adjusted.
3. fuel feed system according to claim 2, wherein, it is also equipped with：
Gaseous fuel pump (110), the liquid gas fuel of the gas fuel tank is sprayed to the engine；And
Liquid fuel feed pump (10), the liquid fuel of the liquid fuel tank is sprayed to the engine,
The mixed proportion control unit is by being controlled the gaseous fuel pump and liquid fuel feed pump, to the hair
The mixed proportion of liquid gas fuel and liquid fuel in the fuel combination of motivation supply is adjusted.
4. fuel feed system according to claim 3, wherein, it is also equipped with：
Contribution calcutation portion (66), calculates the mixed proportion of the fuel combination supplied to the engine；And
Mixed proportion configuration part (67), sets the target mix ratio example by the engine calls,
The mixed proportion control unit is controlled the gaseous fuel pump and the liquid fuel feed pump, so that by described mixed
The mixed proportion that composition and division in a proportion example calculating part calculates becomes the target mix ratio example.
5. fuel feed system according to claim 4, wherein,
The contribution calcutation portion by the flow of the liquid fuel estimating to spray from the liquid fuel tank, from the gas
The flow and mixed proportion for the ejection fuel that fuel tank sprays, to calculate the mixed of the fuel combination supplied to the engine
Composition and division in a proportion example.
6. fuel feed system according to claim 4 or 5, wherein,
The contribution calcutation portion calculates mixing based on the volume modulus of the fuel combination supplied to the engine
Ratio.
7. the fuel feed system according to any one of claim 4~6, wherein,
Volume of the contribution calcutation portion based on the fuel combination supplied to the combustion chamber of the engine is supplied with passing through
The burning for the fuel combination given and the correlation between the torque of the engine that exports, supply to calculate to the engine
Fuel combination mixed proportion.
8. the fuel feed system according to any one of claim 4~7, wherein,
The contribution calcutation portion is mixed based on the combustion chamber injection from starting to the engine in combustion period once
The injection for closing fuel starts time of the timing untill the ignition timing of the fuel combination ignition sprayed, to calculate to described
The mixed proportion of the fuel combination of engine supply.
9. the fuel feed system according to any one of claim 4~8, wherein,
The mixed proportion control unit liquefies with the target mix ratio example set by the mixed proportion configuration part
The ratio increase of gaseous fuel, by the control of the gaseous fuel pump and the liquid fuel feed pump, to make to the engine
The flow increase of the fuel combination of supply.
10. the fuel feed system according to any one of claim 4~9, wherein,
Surplus and the liquid fuel of the mixed proportion configuration part based on the liquid gas fuel in the gas fuel tank
The surplus of liquid fuel in case, to adjust the target mix ratio example.
11. the fuel feed system according to any one of claim 1~10, wherein,
The volume of the gas fuel tank is more than the volume of the liquid fuel tank.
12. the fuel feed system according to any one of claim 1~11, wherein,
The exit portion (32b) for forming the return pipe arrangement (31) of the return fuel system is only connected with the gas fuel tank.
13. the fuel feed system according to any one of claim 1~12, wherein,
The supply fuel system has the gaseous fuel supply road that the liquid gas fuel for the gas fuel tank circulates
Liquid fuel supply road (21a) and supply fuel combination from institute that (23a), the liquid fuel for the liquid fuel tank circulate
The merging part (25) for stating gaseous fuel supply road and liquid fuel supply road supplies road to the fuel combination that the engine circulates
(26a),
Be provided with the fuel combination supply road removal liquid gas fuel and liquid fuel each in it is mixed different
The common fuel filter (27) of thing.
14. the fuel feed system according to any one of claim 1~13, wherein,
The liquid fuel tank has an air introduction part (92), and the air introduction part (92) is by from the outside of the liquid fuel tank
Air is internally imported to maintain the pressure of the inside.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-160527 | 2015-08-17 | ||
| JP2015160527A JP6350445B2 (en) | 2015-08-17 | 2015-08-17 | Fuel supply system |
| PCT/JP2016/071494 WO2017029938A1 (en) | 2015-08-17 | 2016-07-22 | Fuel supply system |
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| Publication Number | Publication Date |
|---|---|
| CN107923351A true CN107923351A (en) | 2018-04-17 |
| CN107923351B CN107923351B (en) | 2020-08-18 |
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| CN201680047991.6A Active CN107923351B (en) | 2015-08-17 | 2016-07-22 | Fuel supply system |
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| JP (1) | JP6350445B2 (en) |
| CN (1) | CN107923351B (en) |
| DE (1) | DE112016003764T5 (en) |
| WO (1) | WO2017029938A1 (en) |
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- 2016-07-22 CN CN201680047991.6A patent/CN107923351B/en active Active
- 2016-07-22 WO PCT/JP2016/071494 patent/WO2017029938A1/en active Application Filing
- 2016-07-22 DE DE112016003764.3T patent/DE112016003764T5/en not_active Ceased
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057999A (en) * | 2018-10-09 | 2018-12-21 | 广西玉柴机器股份有限公司 | Gas engine special gas source mixing device |
| CN110307098A (en) * | 2019-06-28 | 2019-10-08 | 中船黄埔文冲船舶有限公司 | A kind of fuel feed system and method for engine |
| CN110307098B (en) * | 2019-06-28 | 2021-12-28 | 中船黄埔文冲船舶有限公司 | Fuel supply system and method of engine |
| CN117871771A (en) * | 2024-03-13 | 2024-04-12 | 山东国研自动化有限公司 | Big data-based gas energy monitoring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107923351B (en) | 2020-08-18 |
| WO2017029938A1 (en) | 2017-02-23 |
| JP2017040168A (en) | 2017-02-23 |
| DE112016003764T5 (en) | 2018-05-03 |
| JP6350445B2 (en) | 2018-07-04 |
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