CN109154256A - The fuel feed system and method for running fuel feed system of internal combustion engine for gas operation - Google Patents

The fuel feed system and method for running fuel feed system of internal combustion engine for gas operation Download PDF

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Publication number
CN109154256A
CN109154256A CN201780029234.0A CN201780029234A CN109154256A CN 109154256 A CN109154256 A CN 109154256A CN 201780029234 A CN201780029234 A CN 201780029234A CN 109154256 A CN109154256 A CN 109154256A
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China
Prior art keywords
fuel
pressure
gas
feed system
fuel tank
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Granted
Application number
CN201780029234.0A
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Chinese (zh)
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CN109154256B (en
Inventor
F·赫尔岑亚克
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
    • F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
    • 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
    • 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
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • 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
    • 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
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0391—Thermal insulations by vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
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    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
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    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
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    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
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    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/043—Localisation of the removal point in the gas
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    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
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    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
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    • F17C2260/00—Purposes of gas storage and gas handling
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    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/02—Mixing fluids
    • F17C2265/022—Mixing fluids identical fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • 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

Abstract

The present invention relates to a kind of fuel feed systems (100) of internal combustion engine for gas operation, the fuel feed system has at least one gas trap (30), for storing the fuel tank (10) of the fuel (1) of low temperature, the carburetor arrangement (20) of the fuel (1) is connect and is used for the fuel tank (10) by extraction pipeline (16), and have for the gas phase of the fuel (1) to be fed into the device (40) extracted in pipeline (16) from the fuel tank (10), the gas trap can controlled device (50) manipulation for by gas at least indirectly being blown into the combustion chamber of the internal combustion engine, wherein, the pressure (p) present in the fuel tank is depended on as the amount of the gaseous fuel (1) of described device (40) feed-in.

Description

For gas operation internal combustion engine fuel feed system and for run fuel supply The method of system
Technical field
The present invention relates to a kind of fuel supply systems of the internal combustion engine for gas operation of preamble according to claim 1 System.In addition, the present invention relates to a kind of according to independent claim to a method preamble for running fuel feed system Method.
Background technique
The known fuel feed system for gas operation according to two independent claims preambles from practice And the method for running fuel feed system.This fuel feed system runs internal combustion particularly for using natural gas Machine.Known such system herein, in the system, natural gas in a liquefied state, combustion is stored under low-temperature condition In hopper.Typically, natural gas has the temperature lower than -160 DEG C to fuel herein in other words.At said temperatures, natural gas exists It is stored in fuel tank under about 5bar to the pressure between 16bar.In addition, natural gas typically at least 90% by methane and Most 10% by it is other relative to methane be more difficult to volatilization, i.e. in higher temperature just volatilize component (such as ethane, propane and Other components) composition.
The temperature of fuel in fuel tank can be during the driving period or since external condition changes.This equally causes fuel The variation of pressure in case.Especially when fuel tank heats up, the pressure rise of fuel natural gas in other words occurs in fuel tank. However, because fuel tank safety or it is explosion-proof due to be only allowed within for example, maximum pressure of 20bar and run, It must assure that the pressure in fuel tank is no more than above-mentioned critical pressure.For this purpose, using a kind of pressure-regulating valve form in practice Device, the pressure-regulating valve is for example with the valve components of load on spring, and the valve components are from certain pressure towards carburetor arrangement Open the channel along the extraction pipeline direction for fuel in direction.This device is also used as so-called " economical adjuster (Economizer Regulator) " is known.Pressure in fuel tank is higher, and the gaseous component of fuel is just more via pressure Regulating device addition is mixed into other words in the liquid phase for extracting the fuel in pipeline.It is important in this that fuel first volatilizees Component, namely for methane be predominantly located in the gas phase of fuel, above the filling liquid level of liquid fuel i.e. in fuel tank.This leads again It causes, with the pressure rise in fuel tank, methane is mixed into more and more in the liquid phase of fuel, and is next being supplied to It is vaporized before gas trap.However, because methane needs (with oxygen air in other words) of the liquid composition different from fuel Burning of the stoichiometric ratio for optimization, the liquid composition also have the component for being more difficult to volatilization in addition to methane, so Gas trap supply gas is given according to the corresponding existing pressure in fuel tank in practice, which needs different stoichiometric ratios Burning of the example for optimization.Because should not only meet power expectation load expectation in other words, and require in internal combustion engine operation In accordance with exhaust gas discharge value, the exhaust gas discharge value can be monitored or be adjusted by exhaust gas probe, therefore, be worth pursuit It is the gas composition for knowing to be supplied to gas trap, so as to realize the excellent of gas by correspondingly (pre-) manipulation gas trap Change, i.e. exhaust gas discharges few burning as far as possible.
Summary of the invention
The prior art shown in, the task that the present invention is based on are, according to the preamble of two independent claims Extension is used for the fuel feed system for the internal combustion engine that gas is run and the side for running fuel feed system in this wise for part Method makes it possible to realize the optimization operation of internal combustion engine or gas trap.The optimization operation of internal combustion engine or gas trap is especially managed Solution for optimization pre- manipulation, such as gas trap determination manipulation frequency, to optimize exhaust gas discharge value.
According to the present invention, the task is by having internal combustion there are two independent claims feature, for gas operation The fuel feed system of machine and method for running fuel feed system solve.
The idea that the present invention is based on is being known for the gas phase of fuel to be fed into the spy for extracting the device in pipeline Property, started to open from which pressure described device and under which pressure described device reach its maximum open position state and In the case where knowing the pressure sensed by pressure sensor, can deduce the composition of fuel, the pressure sensor sensing by The blend pressure that the liquid phase of fuel and the gas phase of fuel are constituted.Stoichiometric ratio can be calculated again from the composition of fuel, When the stoichiometric ratio, gas optimally burns fuel in other words, to realize exhaust gas discharge value as well as possible.Therefore, Base for example to influence gas trap based on the pre-control value of fuel composition is used for by the pressure value that pressure sensor senses In load expectation required manipulation time or manipulation frequency.
The fuel feed system of the internal combustion engine according to the present invention for gas operation is provided in the dependent claims Advantageous extension scheme.
It is particularly preferred that pressure sensor is closely arranged in front of or after carburetor arrangement, the carburetor arrangement For heating liquid phase fuel and thus making its vaporization.By closer vaporizer unit and therefore also closer fuel tank Advantageous arrangement especially makes other to may cause raised the influences minimum of fuel pressure or exclude the influence.
Another advantageous configuration setting of the invention, only by the over-voltage in fuel tank by fuel from fuel tank towards vaporizer The direction of device conveys.It therefore, there is no need to fuel delivery means that are individual, increasing cost petrolift in other words.Alternatively, when The fuel delivery means that liquid fuel is conveyed towards carburetor arrangement direction can be so set.
Furthermore it is preferred that using the gas trap in the air inlet pipe region for being arranged in internal combustion engine.However, the present invention in principle should It can be used for such gas trap: where each combustion chamber of internal combustion engine is equipped with the gas being directly blown into combustion chamber Valve.
Detailed description of the invention
By preferred embodiment below explanation and obtain additional advantage of the invention, feature and details with reference to the accompanying drawings.This A little attached drawings are shown:
Extremely simplified diagram of the Fig. 1 for the regional area of the fuel feed system of the internal combustion engine of gas operation, and
The characteristic that Fig. 2 is arranged in the pressure-regulating device in fuel tank region in the fuel feed system according to Fig. 1 is bent Line.
Specific embodiment
In Fig. 1, pole, which is simplifiedly shown, is transported using fuel 1 of the low temperature in natural gas form for gas The fuel feed system 100 of capable internal combustion engine.The fuel feed system 100 include fuel tank 10, the fuel tank structure be for At low temperature, i.e. in typically lower than -160 DEG C of at a temperature of storage fuel 1.For this purpose, fuel tank 10 is illustratively with known Mode has shell 11, which surrounds interior case 12.Intermediate space 13 between shell 11 and interior case 12 is typically pumped into Vacuum, to make interior 12 thermal insulation of case or to make to be input to from surroundings outside in interior case 12 and be therefore input to fuel 1 In heat input minimize.In addition, as it is known, divided by partition wall 14 or the internal case 12 of similar structures, So as to realize that the pressure in interior case 12 is balanced in different temperatures.The defeated of fuel 1 occurs from a region 15 of interior case 12 It send, fuel 1 has filling liquid level 2 in the area.Above filling liquid level 2, fuel 1 (complete) exists with its gas phase, and 2 lower section of liquid level is filled, fuel 1 (complete) exists with liquid phase.
Below the filling liquid level 2 of fuel 1, the extraction pipeline 16 for fuel 1 is passed through in interior case 12.Due in fuel There are over-voltage (such as in 5bar between 16bar) in case 10, extract pipeline 16 for fuel 1 and are transported to vaporizer from fuel tank 10 In device 20, which is allowed to vaporize in other words for heating fuel 1 freeze deeply or liquid.Excess pressure valve 21 connects Onto carburetor arrangement 20, which has the connection with buffer storage 22 again.Shut-off valve 23 is connected to buffer storage On 22, which is used to prevent the direction towards the combustion chamber of internal combustion engine from conveying gaseous fuel 1 in internal combustion engine not running.For Pipeline 24 is answered to lead to gas trap 30 from buffer storage 23, which is illustratively arranged at the area of the air inlet pipe 3 of internal combustion engine In domain and for being blown into gaseous fuel 1 in the region of air inlet pipe 3.When correspondingly opening intake valve, fuel is from described The region of air inlet pipe enters in the combustion chamber regions of unshowned internal combustion engine.Gas trap 30 is manipulated by control device 50, is used In other input variables of manipulation gas trap 30, especially load expectation and other parameters is input to the control as input value Device processed.
Preferably, be disposed in interior case 12 play the role of pressure-regulating valve, for the gas phase of fuel 1 to be fed into pumping Take the device 40 in pipeline 16.The device 40 is especially arranged in above filling liquid level 2 in interior case 12 and has feed-in pipeline 41, which is passed into before carburetor arrangement 20 in extracting pipeline 16 outside fuel tank 10 and extracts pipeline 16 In.In addition, being disposed with pressure between the feed-in position 42 that feed-in pipeline 14 is passed into extraction pipeline 16 and vaporizer unit 20 Force snesor 45, the pressure sensor are extracting pressure present in pipeline 16 and are becoming the pressure as input for sensing Amount inputs to control device 50.
The characteristic curve K of the open position state Q of device 40 is shown in Fig. 2 about the pressure p in interior case 12.It is exemplary herein As it can be seen that until the pressure p in interior case 12 reaches 5bar, device 40 is completely closed on ground, i.e., open position state is 0%.It means that straight Reach 5bar to pressure p, from interior case 12 only extract in liquid form, i.e. filling liquid level 2 below fuel 1.Phase therewith Over the ground, from the pressure p of illustrative 10bar, reach the maximum open position state Q of the 100% of device 40, from the pressure, from The fuel 1 above filling liquid level 2 is only extracted in interior case 12.Therefore, from the pressure p of 10bar, the gas phase quilt of final fuel 1 It is supplied to vaporizer unit 20.On the contrary, under the premise of characteristic curve K linearly extends, when pressure p is 7.5bar, combustion The 50% of material 1 is filling below liquid level 2, is being supplied to vaporizer unit 20 in liquid form, and the 50% of fuel 1 is in filling liquid 2 top of position is supplied to vaporizer unit under gaseous state.
Control device 50 have algorithm or characterisitic family, the characterisitic family can be realized extract pipeline 16 in by Being associated between the pressure p that pressure sensor 45 senses and the composition of the component of fuel 1.Composition should be understood as firing herein Percentage composition in terms of the low volatile component and higher volatile component of material 1.Know to be supplied to carburetor arrangement 20 and because In the case that this is also supplied to the composition of fuel 1 of gas trap 30, control device 50 calculates pre-control value V, the pre-control value quilt For being adapted to the manipulation of gas trap 30.In addition, sensing actual exhaust gas by unshowned exhaust gas probe or lambda seeker Quality or exhaust gas composition.If knowing the composition when pressure p for example sensed at two of 5bar and 15bar, Immediate pre-control value V can be advanced optimized or is adapted to by extrapolation in the case where pressure is between them.
With regard to the fuel feed system 100 illustrated by this can without departing from present inventive concept in many ways by Change or modifies.

Claims (6)

1. a kind of fuel feed system (100) of the internal combustion engine for gas operation, the fuel feed system have at least one A gas trap (30), the fuel tank (10) of fuel (1) for storing low temperature, by extracting pipeline (16) and the fuel tank (10) connect and be used for the fuel (1) carburetor arrangement (20), and have for by the gas phase of the fuel (1) from The fuel tank (10) is fed into the device (40) in extraction pipeline (16), and the gas trap being capable of controlled device (50) Manipulation for by gas at least indirectly being blown into the combustion chamber of the internal combustion engine, wherein by described device (40) feed-in The amount of gaseous fuel (1) depends on the pressure (p) present in the fuel tank,
It is characterized in that,
It is provided with pressure sensor (45), the pressure sensor configurations are for sensing the fuel being made of liquid and gas (1) pressure (p), also, the control device (50) is configured to what basis was sensed by the pressure sensor (45) Pressure (p) manipulates at least one described gas trap (30).
2. fuel feed system according to claim 1,
It is characterized in that,
The pressure sensor (45) is arranged in the extraction pipeline (16) gas phase being fed into the extraction pipeline (16) it after the feed-in position (42) in or is arranged in after the carburetor arrangement (20).
3. fuel feed system according to claim 1 or 2,
It is characterized in that,
The conveying in the fuel (1) towards the carburetor arrangement (20) direction is based only upon the combustion in the fuel tank (10) Expect the pressure (p) of (1).
4. fuel feed system according to any one of claim 1 to 3,
It is characterized in that,
The gas trap (30) is arranged in the region of air inlet pipe (3) of the internal combustion engine.
5. fuel feed system according to any one of claim 1 to 4,
It is characterized in that,
Described device for being fed into the gas phase of the fuel (1) from the fuel tank (10) in the feed-in pipeline (16) (40) it is configured to the excess pressure valve for the pressure (p) being limited in the fuel tank (10) simultaneously.
6. one kind is for the method that runs fuel feed system (100), the fuel feed system in particular according to claim 1 to The construction of fuel feed system described in any one of 5, wherein according to the fuel tank (10) in the fuel (1) for storing low temperature Present in pressure (p) by for by the gas phase of the fuel (1) from the fuel tank (10) be fed into extract pipeline (16) In device (40) a certain amount of gaseous fuel (1) is fed into the liquid phase of the fuel (1),
It is characterized in that,
By the pressure (p) of fuel (1) that pressure sensor (45) sensing is made of liquid and gas, also, by the pressure The control device (50) for manipulating at least one gas trap (50) is inputed to as input value, the control device (50) is based on The pressure (p) deduce the gas phase of the fuel (1) and the mixed proportion of liquid phase and thus generate pre-control value (V), also, At least one described gas trap (30) is manipulated based on the pre-control value (V).
CN201780029234.0A 2016-05-12 2017-03-15 Fuel supply system for a gas-operated internal combustion engine and method for operating a fuel supply system Active CN109154256B (en)

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DE102016208166.7A DE102016208166A1 (en) 2016-05-12 2016-05-12 A fuel supply system for a gas powered internal combustion engine and method for operating a fuel supply system
DE102016208166.7 2016-05-12
PCT/EP2017/056138 WO2017194227A1 (en) 2016-05-12 2017-03-15 Fuel supply system for a gas-operated internal combustion engine and method for operating a fuel supply system

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