CN109891078A - System for liquefied gas to be compressed to goal pressure - Google Patents
System for liquefied gas to be compressed to goal pressure Download PDFInfo
- Publication number
- CN109891078A CN109891078A CN201780065974.XA CN201780065974A CN109891078A CN 109891078 A CN109891078 A CN 109891078A CN 201780065974 A CN201780065974 A CN 201780065974A CN 109891078 A CN109891078 A CN 109891078A
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- Prior art keywords
- pressure
- gas
- fuel
- pump
- supply line
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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
- 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
- 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
- F02D19/02—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 gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
-
- 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
- F02D19/02—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 gaseous fuels
- F02D19/026—Measuring or estimating parameters related to the fuel supply system
- F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
-
- 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
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
- F02M21/0224—Secondary gaseous fuel storages
-
- 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
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- 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
- F02M21/0248—Injectors
- F02M21/0275—Injectors for in-cylinder direct injection, e.g. injector combined with spark plug
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
- F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
- F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the common rail
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0275—Arrangement of common rails
- F02M63/028—Returnless common rail system
-
- 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
- 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
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The present invention relates to a kind of systems (1) for being used for compressed liquefied gas (2), including for gas (2) to be pushed to high pressure level PHHigh-pressure pump (4) and for making gas (2) from high-pressure horizontal PHIt is depressurized to target pressure level PRPressure regulating unit (5), wherein, pressure regulating unit (5) is configured to, cause the decompression by the way that the partial amount (22) of gas (2) to be discharged into reflux pipeline (7), it is characterized in that, reflux pipeline (7) is linked into gas (2) supply line (41) for leading to high-pressure pump (4).The invention further relates to a kind of corresponding fuel system (9) and computer program products.
Description
Technical field
The present invention relates to a kind of system for compressed liquefied gas, which for example can be for liquefied natural gas
It is used in the fuel system of the engine of operation.
Background technique
In co-rail diesel engine, diesel fuel is ejected into the burning of engine respectively from multiple injectors under high pressure
In room.Injector is collected rail (Rail) by common fuel and is supplied with fuel.High pressure is provided by high-pressure pump.Required rail pressure
Power depends on the operating point of engine.In order to abide by emission limit value, it is important that always supplied fuel with correct rail pressure power
Injector should be given.Therefore, rail pressure power from the high-pressure horizontal provided by high-pressure pump begin through pressure-regulating valve be depressurized to it is lower
Target pressure level, mode are that a part of fuel is made to flow back into fuel tank.This fuel system is for example by US 6 912
Known to 983 B2.
The reduction that ensure that operating cost instead of diesel fuel using natural gas, because natural gas is bright in terms of energy content
It is aobvious more advantageous.In addition, the conversion of equal energy leads to the significantly less CO compared with diesel fuel operation2Discharge.It can make
With with fuel system on all four when being run with diesel fuel.2,005 090 392 A of JP discloses an example.
Different from the fuel tank for diesel fuel, the storage container for liquefied natural gas is closed relative to ambient enviroment
Pressure vessel.It is brought into gas backstreaming not only in container by pressure but also by heat to the pressure vessel, wherein heat swashs
It sends out natural gas evaporation and therefore further increases pressure.However, excessive pressure rise should be avoided, because in the pressure that oversteps the extreme limit
The pressure limit valve that is switched in storage container when power and escape into unburned natural gas in environment.On the one hand, it wraps
The methane being contained in natural gas is greenhouse gases, and on the other hand, natural gas can form flammable mixture in conjunction with air.
Summary of the invention
Within the scope of the present invention, a kind of system for compressed liquefied gas is developed.The system include for make gas from
High-pressure horizontal PHIt is depressurized to target pressure level PRPressure regulating unit.Pressure regulating unit is configured to by by gas
The partial amount of body is discharged into reflux pipeline to depressurize.
Here, pressure regulating unit is especially appreciated that as a kind of unit, in the unit, target pressure level PRIt can be one
Determine unrestricted choice in the limit and can be dynamically matched in system operation, is started for example to track by what the system was supplied
The operating point of machine.
According to the present invention, reflux pipeline is passed into the gas feedthroughs for leading to high-pressure pump.
It is known that can advantageously avoid for heat and quality being additionally brought into this way feeding to high-pressure pump
Storage container in.Especially in the fuel system for engine, this has the advantages that multiple:
Heat into storage container, which is brought into bring into quality, no longer to be influenced to make as when running in diesel fuel
Target pressure level PRDynamically track the operating point of engine.Thus, it is possible to noise and the row of engine are reduced with this degree
It puts, so that they are corresponding to effective regulation.
Gas is discharged in environment so as to improve environmental characteristics by cancellation.
Cancel additionally that heating storage container is to allow vehicle longer down time after a shutdown, and gas does not escape
Out.
Because the more cooling capacity being stored in liquefied natural gas use for receiving pump waste heat, thus are selecting and designing
There are more freedom degrees when pump scheme.
It is used to lead back to natural gas by pressure regulating unit necessary to can save completely on storage container so far
Interface.Thus it eliminates and is brought by the additional heat that heat pipeline carries out, and can be more by reducing structural complexity
It is advantageously made storage container.
Under static state, less residual gas is escaped into environment by the leakage gap of injector.
Engine is run with frequent varying duty no longer necessarily to be needed simultaneously, or in order to avoid in storage container
Pressure increase and the adjusting circuit for rail pressure power must be intervened or natural gas must be discharged in environment.
In particularly advantageous configuration, be connected to before high-pressure pump for by gas by pressure store PVPush
To middle voltage levels PMOn prime delivery pump.Reflux pipeline is passed into the liquefied gas supply pipe by prime delivery pump to high-pressure pump
In line.In this way, reflux gas must only be decompressed to stress level PMRather than it is decompressed to pressure store PV, so that being before
Compress the fewer parts loss of the gas and the energy used in high-pressure pump.In addition, the prime delivery pump of operation can be protected
Card, the gas of reflux will not be flow back into the storage container fed to prime delivery pump.
Optionally, concurrently with reflux of the gas into reflux pipeline, the power of high-pressure pump can also be controlled.The reflux is then
It can be immediate reaction, the immediate reaction is across a period of time, until high-pressure horizontal PHLasting reduction show effect.
In further especially advantageous configuration of the invention, non-return is disposed in the supply line for leading to high-pressure pump
Valve, the check-valves forbid gas backstreaming into prime delivery pump and/or flow back into the gas storage appearance that can be connect with supply line
In device.Such prime delivery pump also can be used in this way: the operation of the prime delivery pump can appear in it due to reflux gas
Exit and may be interfered.It can also be with completely left out prime delivery pump and with the current draw power of high-pressure pump independently
Always ensure, the gas of reflux only flows into high-pressure pump without being flowed into storage container.
In further especially advantageous configuration of the invention, it is connected in reflux pipeline towards the supply for leading to high-pressure pump
The check-valves that the direction of pipeline is opened.This can forbid by with stress level PVStorage container or by prime conveying pump out
The middle voltage levels P of mouth sideMUndesirable gas flowing into pressure regulating unit, even if in such operating status:
Pressure under the operating status in the reflux pipeline from pressure regulating unit is less than PVOr PM.This operating status example
It such as can be starting of the system since the state entirely without pressure.If then filled with the liquefied gas from storage container
Reflux pipeline then makes to pass through pressure adjusting list in next step due to depressurizing the amount raising that volume reduces and high-pressure pump must convey
Member decompression consumingly becomes difficult.
In further particularly advantageous configuration of the invention, be connected in reflux pipeline low pressure buffer memory and/or
Throttle.In this way, the decompression carried out by pressure regulating unit can be made in time and in systems to reflux
Gas is further processed decoupling.For example, target pressure level PRBe decreased obviously and will lead to, high-pressure pump is adjusted to lower
High-pressure horizontal PH.In this condition, it may be a kind of excess supply that gas, which is flowed back into without delay in high-pressure pump,.
In further particularly advantageous configuration of the invention, the decoupling can be maximized.In the configuration, flowing back
It in, low pressure buffer memory and enters being passed through between portion in supply line in pipeline and is connected to and can close valve.Valve, which can be closed, is
Can be operable in any way, such as can electromagnetically or pneumatically operate.
In further particularly advantageous configuration of the invention, it is slow that high pressure is connected between high-pressure pump and pressure regulating unit
Rush memory and/or for making gas transition to the evaporator of gaseous state.
Can for example it be caused by evaporator, the gas used as engine fuel can be supplied to hair with gaseous state
The combustion chamber of motivation, and specific advantages can be provided with liquid condition storage in storage container simultaneously: since gas is in liquid
There is considerably higher density compared under gaseous state, therefore can be in pressure store P under stateVConsiderably lower situation
It is lower to store same energy.Liquefied natural gas for example can be in -146 DEG C to -115 DEG C of temperature with 3 to the pressure between 15bar
It is stored.In order to, with the identical energy of gaseous state receiving, need the pressure of the 200bar order of magnitude in same container volume,
This significantly increases the mechanical requirements to storage container.
On the other hand, additional heat is introduced into gas by evaporator according to the rules.In this respect particularly advantageously,
The additional heat is not introduced in storage container due to the reflux of gas.
If being provided with evaporator, the gas in the supply line for leading to high-pressure pump is flowed back into no longer by reflux pipeline
It is liquid, but gas.The reflux gas then has lower density, and it reduce the maximum deliveries of high-pressure pump.
However this is not problem in pressure reduction, because this only relates to the short-term conveying capacity on the pressure reduction duration
It reduces and in this case to high pressure level P is inHGas flow demand it is natively very low or even zero.
High-pressure buffer memory is especially combined with preposition evaporator and is advantageous.The evaporation rate of liquefied gas can be adjusted
Save relatively slow.If needing higher target pressure level P suddenlyR, then high pressure accumulator facilitates to cover in this respect
Demand peaks.On the other hand, additional time constant is imported into system by high-pressure buffer memory.Have in this respect and especially
Benefit, by can be rapidly to target pressure level P into the supply line for lead to high-pressure pump by gas backstreamingRReduction
It makes a response.
According to the foregoing description, feed one since being used for the invention further relates to one kind from the fuel that fuel collects rail (Rail)
Or the fuel system of multiple injectors or gas trap.Here, injector or gas trap are configured to, control is entered
Quality of fuel flow at least one combustion chamber of engine.Storage container is provided with for saving as liquefied gas
Fuel.
According to the present invention, it is collected in rail in fuel and is provided with above system according to the present invention, it is predetermined for generating
Pressure PR.Above-mentioned advantage especially generates in the fuel supply of vehicle motor.Operating point fairly frequently converts, such as basis
It converts depending on the position of gas pedal, however is also converted in each shift process, because between engine and speed changer
Clutch must always be opened.In addition, vehicle motor bears the particularly severe ring in terms of exhaust gas discharge and noise
Border requires.
Liquefied gas especially can be natural gas.Advantages of the present invention especially generates at this moment, because of natural gas and propane
Compared to can only liquefy in low temperature.Hydrogen is equally applicable to as liquefied gas, wherein need obviously to store at this moment
Lower temperature.
Make gas backstreaming into the intake pipeline for leading to high-pressure pump as a result, the pressure rise in intake pipeline.Pressure
Raised amount depends on gas and is how fast continued with by high-pressure pump.In particularly preferred configuration of the invention, setting control
Device is configured to be adapted to the rate of pressure reduction of pressure regulating unit in time as follows, so that in the confession for leading to high-pressure pump
Answer the pressure P in pipelineZNo more than predetermined threshold value.If due to lead to high-pressure pump intake pipeline in strong pressure
Rise the damage that will lead to intake pipeline or preposition prime delivery pump, then can make in this way as fast as possible in in-orbit
The target of pressure reduction lies on the table, to be conducive to prior target, that is, keeps system health.Lead to the supply pipe of high-pressure pump
Line is usually already provided with pressure sensor, and pressure regulating unit has always been connect with engine controller, this starts
Machine controller makes goal pressure PRTrack the operating point of engine.Engine controller then can be when necessary even by merely
Change its software to be adapted to as follows, so that the decompression power rate of pressure regulating unit in time tracks boundary condition, that is, leading to
Pressure PZ in the supply line of high-pressure pump is no more than threshold value.
Therefore, the invention further relates to a kind of computer program product, there is machine readable instruction, when this on computers
And/or when executing the instruction on controller, which can make the computer and/or controller appreciate with above-mentioned in pressure
Reduce the function in terms of rate.
Detailed description of the invention
Below with of the invention other improved to the explanation of the preferred embodiment of the present invention together detailed description by attached drawing arrange
It applies.
Attached drawing is shown:
The embodiment of Fig. 1 fuel system 9 has the check-valves 71 in reflux pipeline 7；
The embodiment of Fig. 2 fuel system 9 has the low pressure buffer memory 72 in reflux pipeline 7 and can close
Valve 73；
There is the embodiment of Fig. 3 fuel system 9 check-valves 43 to replace prime delivery pump 3.
Specific embodiment
According to Fig. 1, system 1 is as a whole from pressure store PVSetting out, (liquefied gas 2 is stored in storage with the pressure store
In container 21) it provides with target pressure level PRLiquefied gas 2.
For this purpose, gas 2 be transported in the intake pipeline 41 for leading to high-pressure pump 4 by prime delivery pump 3 first and
It is compressed to middle voltage levels P at this momentM.Gas 2 is further compressed to high-pressure horizontal P by high-pressure pump 4H.In high-pressure horizontal PH, liquid
Change gas 2 to be converted to gaseous state by evaporator 51 and be stored in high-pressure buffer memory 52.
High-pressure horizontal PHDetermined size in this way: it is higher than maximum required target pressure level PR.Gas 2 is from PHTo PR
Decompression, mode is that the partial amount 22 of gas 2 is discharged into reflux pipeline 7.
In example shown in FIG. 1, arrange that check-valves 71, the check-valves only allow gas 2 by returning in reflux pipeline 7
Flow tube line 7 is flow in the intake pipeline 41 for leading to high-pressure pump 4, however forbids it from 41 reverse flow of intake pipeline to return pipe
In line 7.
The partial amount 22 of gas 2 being discharged into reflux pipeline 7 is re-compressed by high-pressure pump 4 and is passing through evaporator 51
It is stored in high-pressure buffer memory 52 again later.
System 1 finally will be in target pressure level P in gaseous stateRGas 2 be transported to fuel collect rail 6 in.Hair
The injector of motivation 8 is collected rail 6 by fuel and is supplied with gas 2, one be exemplarily only included in these injectors in Fig. 1
A injector 81.Gas 2 is blown into combustion chamber 82 by injector 81.The demand of gas 2 and to be blown into required pressure PRAll take
Certainly in the operating point of engine 8.
Engine 8 is controlled by controller 84.Controller 84 is particularly by control pipeline 84a manipulation injector 81 and therefore
Determine when injector 81 opens and closes respectively.In addition, controller 84 is based on the existing operation about engine 8 on it
The information of point seeks the target pressure level P being respectively necessary forR, and correspondingly manipulate pressure regulating unit 5.Here, controller
84 monitor the pressure P in the intake pipeline 41 for leading to high-pressure pump 4 by pressure sensor 42Z.Pass through 5 institute of pressure regulating unit
The time-program(me) of the partial amount 22 for being discharged into reflux pipeline 7 of the decompression and gas 2 of progress matches as follows: so that pressure PZNo
More than predetermined threshold value.
The operating point and target pressure level P of engine 8RBetween correlation be to be needed in engine high load
High pressure PR, so that enough gas 2 is blown into combustion chamber 82 in pot life, and needed in fractional load lower
Pressure PR, to make discharge and combustion noise keep smaller.
Middle voltage levels PMHigher than pressure store PV, however it is significantly lower than high-pressure horizontal PH, which may be at
500bar is also higher.
System 1, storage container 21 and fuel collect rail 6 and controller 84 is collectively formed and supplies for the fuel of engine 8
System 9.
In storage container 21, there is also gas phases on the liquid level of the liquid phase of gas 2.
Fig. 2 shows another embodiments.It, will be by low pressure buffer memory 72 and can instead of check-valves 71 different from Fig. 1
The combination that closing valve 73 forms is connected in reflux pipeline 7.The part that reflux pipeline 7 is discharged by pressure regulating unit 5 of gas 2
Valve 73 can be closed by opening to take by measuring the time point that 22 are temporarily stored in low pressure buffer memory 72 and afterwards.It can close
Valve 73 is by controller 84 via control pipeline 84d manipulation.Controller both knows about the current point of operation of engine 8 at any time,
And therefore it is also known that the gas 2 present in low pressure buffer memory should be fed into the supply line for leading to high-pressure pump 4
The optimum time point of supporting function is played in 41.
Fig. 3 shows another embodiment.It is different from Fig. 1, lack prime delivery pump 3.Alternatively, high-pressure pump 4 is by structure
Make for for by gas 2 by pressure store PVSingle stage compress is to high-pressure horizontal PH.In order to there is no gas that can flow from supply line 41
It returns in storage container 21, check-valves 43 is connected in supply line 41.
In addition, supply line 41 is connect by safe pipeline 44 with storage container 2 in the case where getting around check-valves 43.It crosses
Pressure valve 45 is connected in safe pipeline 44, which is being more than predetermined pressure PSThe direction of Shi Chaoxiang storage container 21 is beaten
It opens.According to the present invention, it should just avoid flowing back into storage container 21 under normal circumstances.However in case of a fault, to
Bringing pressure and heat into accordingly and lead to the high pressure not allowed in the supply line 41 of high-pressure pump 4 in storage container 21
Increase smaller compared to drawback.
Finally, reflux pipeline 7 includes also throttle 75, being discharged by pressure regulating unit 5 for gas 2 is made by the throttle
Postpone in time to feed-in of the partial amount 22 in reflux pipeline 7 into the supply line 41 for leading to high-pressure pump 4.Optionally,
Throttle 75 can also be arranged in 71 downstream of check-valves, so that the throttle does not influence the function of check-valves 71.
The functional mode and fuel 2 of fuel system 9 are electronic ignitions after being blown into combustion chamber 82, pass through addition
Diesel ignition is lighted a fire unrelated in other ways.
Claims (11)
1. being used for the system (1) of compressed liquefied gas (2), including for gas (2) to be pushed to high-pressure horizontal PHHigh-pressure pump
(4) and for making gas (2) from the high-pressure horizontal PHIt is depressurized to target pressure level PRPressure regulating unit (5),
In, pressure regulating unit (5) is configured to, and is drawn by the way that the partial amount (22) of gas (2) to be discharged into reflux pipeline (7)
Play the decompression, which is characterized in that the reflux pipeline (7) is passed into the supply pipe for leading to the gas (2) of the high-pressure pump (4)
In line (41).
2. system according to claim 1 (1), which is characterized in that be connected with and be used for gas before the high-pressure pump (4)
Body (2) is from pressure store PVIt is pushed to middle voltage levels PMPrime delivery pump (3), and the reflux pipeline (7) be passed into the past
Grade delivery pump (3) leads in gas (2) supply line (41) of high-pressure pump (4).
3. system (1) according to claim 1 or 2, which is characterized in that be disposed with non-return in the supply line (41)
Valve (43), the check-valves forbid gas (2) flow back into prime delivery pump (3) and/or flow back into it is for gas (2), can be with
In the storage container (21) of supply line (41) connection.
4. according to claim 1 to system described in one of 3 (1), which is characterized in that branch out peace from the supply line (41)
Full pipeline (44), the safe pipeline independently of supply line (41) can be connect with the storage container (21) for gas (2),
In, it is connected in safe pipeline (44) excess pressure valve (45), which is being more than predetermined pressure PSShi Chaoxiang storage container
(21) it opens in direction.
5. according to claim 1 to system described in one of 4 (1), which is characterized in that be connected in reflux pipeline (7) towards institute
State the check-valves (71) that the direction of supply line (41) is opened.
6. system (1) according to one of claims 1 to 5, which is characterized in that it is slow to be connected to low pressure in reflux pipeline (7)
Rush memory (72) and/or throttle (75).
7. system (1) according to claim 6, which is characterized in that in low pressure buffer memory in reflux pipeline (7)
(72) it and enters being passed through between portion in supply line (41) and is connected to and can close valve (73).
8. according to claim 1 to system described in one of 7 (1), which is characterized in that in high-pressure pump (4) and pressure regulating unit
(5) it is connected to high-pressure buffer memory (52) between and/or is connected to the evaporator for making gas (2) be transformed into gaseous state
(51)。
9. fuel system (9), since being used for from the fuel (2) that fuel collects rail (6) feed one or more injectors or
Gas trap (81), wherein the injector or gas trap (81) are configured to, and at least one of engine (8) is arrived in control
Fuel (2) quality stream in combustion chamber (82), the fuel system include for saving as the fuel of liquefied gas (2)
Storage container (21), which is characterized in that collect in rail (6) and be provided with according to claim 1 to being described in one of 8 in fuel
It unites (1), to generate predetermined pressure PR。
10. fuel system (9) according to claim 9, which is characterized in that controller (84) are provided with, by structure
It makes as being adapted to the rate of pressure reduction of pressure regulating unit (5) in time as follows, so that in the supply pipe for leading to high-pressure pump (4)
Pressure P in line (41)ZNo more than predetermined threshold value.
11. computer program product executes institute when on computers and/or on controller (84) comprising machine readable instruction
When stating instruction, described instruction makes the computer and/or controller (84) appreciate for the controller in the sense that claim 10
(84)。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016220851.9A DE102016220851A1 (en) | 2016-10-24 | 2016-10-24 | System for condensing a liquefied gas to a target pressure |
| DE102016220851.9 | 2016-10-24 | ||
| PCT/EP2017/071557 WO2018077512A1 (en) | 2016-10-24 | 2017-08-28 | System for compressing a liquefied gas to a target pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109891078A true CN109891078A (en) | 2019-06-14 |
| CN109891078B CN109891078B (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780065974.XA Active CN109891078B (en) | 2016-10-24 | 2017-08-28 | System for compressing liquefied gas to target pressure |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN109891078B (en) |
| DE (1) | DE102016220851A1 (en) |
| WO (1) | WO2018077512A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018221323A1 (en) * | 2018-12-10 | 2020-06-10 | Robert Bosch Gmbh | Fuel delivery device for an internal combustion engine |
| CH717258A1 (en) | 2020-03-24 | 2021-09-30 | Liebherr Machines Bulle Sa | Device for supplying a gaseous fuel to an engine. |
| CH717460A1 (en) * | 2020-05-28 | 2021-11-30 | Liebherr Machines Bulle Sa | System for providing a gaseous fuel. |
| JP7643406B2 (en) * | 2022-07-04 | 2025-03-11 | トヨタ自動車株式会社 | Hydrogen supply device and hydrogen engine vehicle |
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2016
- 2016-10-24 DE DE102016220851.9A patent/DE102016220851A1/en active Pending
-
2017
- 2017-08-28 WO PCT/EP2017/071557 patent/WO2018077512A1/en active Application Filing
- 2017-08-28 CN CN201780065974.XA patent/CN109891078B/en active Active
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| JP3796146B2 (en) * | 2001-08-10 | 2006-07-12 | 日野自動車株式会社 | DME engine fuel supply system |
| KR20090131990A (en) * | 2008-06-19 | 2009-12-30 | 대우조선해양 주식회사 | Fuel supply system and method of ship |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109891078B (en) | 2022-09-16 |
| WO2018077512A1 (en) | 2018-05-03 |
| DE102016220851A1 (en) | 2018-04-26 |
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