EP4367378A1 - Systeme de rechauffage d'un circuit de carburant gazeux pour demarrage - Google Patents
Systeme de rechauffage d'un circuit de carburant gazeux pour demarrageInfo
- Publication number
- EP4367378A1 EP4367378A1 EP21742366.4A EP21742366A EP4367378A1 EP 4367378 A1 EP4367378 A1 EP 4367378A1 EP 21742366 A EP21742366 A EP 21742366A EP 4367378 A1 EP4367378 A1 EP 4367378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- injection
- engine
- electric
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F02M21/0287—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers characterised by the transition from liquid to gaseous phase ; Injection in liquid phase; Cooling and low temperature storage
-
- 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- 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
- F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
- F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
-
- 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
- F02M21/0293—Safety devices; Fail-safe measures
-
- 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
- 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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/16—Other apparatus for heating fuel
- F02M31/18—Other apparatus for heating fuel to vaporise fuel
Definitions
- TITLE SYSTEM FOR HEATING A GAS FUEL CIRCUIT FOR STARTING.
- the present invention relates to an atmospheric or supercharged internal combustion engine.
- the present invention relates more particularly to a heat engine comprising liquid gas-based carburetion.
- the present invention also relates to a dual-fuel heat engine based on gasoline and liquid gas.
- the present invention relates particularly to a fuel injection circuit based on liquid gas.
- the Euro7 standard requires, for example, switching the combustion engine equipped to dual-fuel petrol and gas, to gas carburation or LPG mode after 40 s. With current solutions, it is not possible to obtain gaseous LPG at this time, because the amount of heat provided by the engine water is not sufficient.
- a case of engine operation can for example cause a problem.
- the case is as follows: with a cold engine, the thermal power provided by the engine water being almost zero, it is not possible to vaporize the liquid LPG. So we have to wait a while relatively long for the engine water to reach a temperature sufficient and necessary for the vaporization of the LPG, to be able to switch to LPG mode. This time (about 3 to 4 minutes) being much longer than that imposed by the standard (40 seconds), it is not possible with the current system to switch to LPG mode and comply with the standard.
- Publications propose heating the gas by a heating device added to a heat engine.
- Publication US6976455-A1 describes an LPG gas heating system arranged directly in the regulator and comprising a loop of the engine cooling circuit.
- a drawback is that the heating can be removed from the fuel injectors in the internal combustion engine and as a result, there can be condensations in particular upstream of the injectors, detrimental to the operation of the engine.
- Another disadvantage is the time taken to heat up the coolant to be able to heat the gas.
- a disadvantage is the possible fouling of said resistances also their failures, which implies being able to replace said heating resistances.
- the object of the invention is to remedy these problems and one of the objects of the invention is a heat engine gas supply circuit comprising a rapid and easily replaceable gas heating device.
- the present invention relates more particularly to a gas injection circuit of a heat engine of a motor vehicle comprising a gas supply conduit connected with a gas injection rail in which is arranged at least one gas injector which opens in an engine intake channel, said supply conduit passing through a heat exchanger with an engine cooling circuit,
- the supply duct includes a gas vaporization device arranged at the inlet of the ramp.
- the liquid gas fuel supply pipe passes through a fuel vaporization device to bring it into the gaseous phase just before it is injected via the injectors into the intake channel.
- the device is arranged at the inlet of the manifold to ensure optimum vaporization of the gas flow passing through it and just before the injectors or as close as possible to the injectors to overcome condensation problems in the manifold.
- the device is an electrical device.
- the vaporization device is of the electric type to ensure the vaporization of the gas in the first instants of starting of the thermal engine, in particular of cold engine starting.
- the vaporization device comprises an electric heating cartridge housed in a boom inlet duct.
- an electric heating cartridge is housed in an inlet duct of the ramp to allow the entire flow of gas passing through the inlet duct to be vaporized easily and to ensure a gas flow in said ramp just before its injection into the engine intake channel.
- the inlet duct has an electrical and thermal protection layer surrounding its outer wall.
- the inlet duct includes a thermal and electrical protection layer which covers its outer wall to overcome the problems of thermal losses and electrical conductivity.
- the heating cartridge comprises an electric filament.
- the heating cartridge comprises an electric filament which is housed in the LPG fuel inlet and passage duct, and in contact with said fuel to allow optimum vaporization.
- the electrical filament is wound in a serpentine.
- the electric filament is wound in a serpentine forming a solenoid to ensure optimum contact with the liquid fuel in the entire passage section of the inlet duct.
- the cartridge comprises coils of electric filaments which extend substantially parallel to the axis of the inlet duct.
- the cartridge comprises several coils of electric filaments which extend substantially parallel to the axis of the inlet duct in order to have a high heating and vaporization power. It is possible that the coils are replaced, for reasons of reliability, by one or more thermal resistors of the immersion heater type.
- the cartridge has a variable heating power.
- the cartridge has a variable heating power which can be activated as a function of the temperature of the coolant in the cooling circuit.
- the heating power is noticeably decreasing with the increase in the temperature of the coolant.
- the vaporization device comprises means for detecting failure of the electric cartridge.
- the vaporization device comprises means for detecting the failure of the electric cartridge to notify maintenance and replacement of the cartridge.
- the spray device is mounted between the supply duct and the boom inlet in a reversible manner.
- the device is mounted reversibly to overcome the problems of failures of the heating cartridge.
- the inlet duct is connected to the ramp and to the supply duct in a reversible manner.
- the inlet duct containing the electrical cartridge can be removed from the supply duct to facilitate rapid exchange of the faulty electrical cartridge.
- FIG. 1 is a schematic view of a liquid gas supply circuit of a heat engine
- FIG. 2 is a schematic longitudinal sectional view of a gas vaporization device.
- FIG. 3 is a schematic cross-sectional view of the gas vaporization device.
- upstream/downstream refer to a direction of gas circulation in the supply circuit here.
- the invention relates to an LPG fuel supply circuit which is an acronym for Liquefied Petroleum Gas which includes butane or propane, for a heat engine of a motor vehicle.
- the invention may also relate to an LPG fuel supply circuit for a gasoline and LPG dual-fuel combustion engine.
- the heat engine comprises an LPG gas supply circuit 100 which successively comprises, depending on the direction of the fuel circuit, a gas tank 30, a pressure reducer 11 arranged at the outlet of the gas tank 30, and a supply conduit 31 to bring said gas to an injection ramp 32.
- Said ramp here has a substantially cylindrical shape delimiting a chamber 32 of the gases.
- Fuel injectors 34 open into said gas chamber 33. The fuel injectors pass through the wall of the chamber to open into an intake distributor or supply channels of the internal combustion engine.
- the gases can then be mixed with intake air before entering an engine combustion chamber.
- the thermal engine comprises, in known manner, a cooling circuit 35 in which a water-based cooling liquid circulates.
- the water is at a given temperature close to the ambient temperature of the engine when the engine is cold.
- the operation of the combustion engine causes the various elements of the engine to be heated and therefore of the cooling liquid capable of drawing off a quantity of heat in contact with the hot zones of the said elements of the engine.
- the heating can be carried out by means of a heat exchanger 36 of the water-gas type connected on the one hand with the gas supply conduit 31 and on the other hand with the cooling circuit 35, in which, in In our case, the coolant gives up its heat to the gas, in particular for gas heating.
- the LPG fuel formed by a mixture of butane and liquid propane is introduced into the engine via the supply pipe 31 which connects the regulator 11 to the injection rail 32.
- the fuel passes through a liquid fuel vaporization device 10 arranged upstream of the injection rail 32.
- the vaporization device is arranged as close as possible to the inlet of the injection rail, in particular as close as possible.
- fuel injectors 34 in order to overcome condensation problems likely to occur over the distance between said device and the injectors 34.
- the vaporization device comprises an inlet duct 12 in which is housed a heating cartridge 14.
- the direction of gas circulation is defined by the arrows.
- the inlet duct is of cylindrical tubular shape in the continuity of the supply duct 31 .
- the passage section of the inlet duct 12 can however be greater than the passage section of the supply duct 31 to increase the power of the vaporization device 10.
- the passage duct 12 comprises a cylindrical tube whose two ends are closed by means of reversible connections 12a.
- the reversible connection means 12a can cover the ends of the inlet duct, said covers have an opening with a passage section equivalent to the passage sections of the injection rail and the supply duct and connected in a simple manner and reversible, for example by screwing or by clipping, to the ramp and to the supply duct.
- the passage duct 12 comprises a thermal and electrical protection layer 12p in order on the one hand to reduce heat losses during the operation of said device and to electrically isolate the device from its motor environment.
- At least one of the two lids can be dislocated from the cylindrical tube to extract the electric cartridge 14. It is also possible to have other removable vaporization devices without calling into question the invention.
- the vaporization device 10 is an electrical device.
- the vaporization is carried out by means of an electric heating element 13 in order to obtain on the one hand a controlled vaporization according to the operating conditions of the engine, on the other to be able to trigger the vaporization of the liquid gas even with a cold engine or when cold engine starts.
- the electric heating cartridge 14 comprises an electric filament 13 held in the chamber 12c of the inlet conduit.
- the electric filament 13 can be wound around an axis substantially parallel to the axis of the inlet duct 12 to form an electric coil 15s or a solenoid and therefore has a gas passage section 15′ substantially parallel to the passage 12' of the inlet duct.
- the electric cartridge 14 can comprise several electric coils 15s of smaller passage section and distributed around the periphery of the chamber 12c of the inlet duct. It is thus possible to increase the vaporization power of the device 10.
- the electric cartridge may consist of as many heating coils as necessary to ensure the necessary and sufficient heat supply for the vaporization of the LPG.
- the passage section of the chamber 12c can be greater than the passage section of the supply duct and/or of the injection ramp to accommodate the number of electric coils.
- the electric coil(s) 15s are held in the chamber 12c of the inlet duct 12 by simple hooking systems allowing them to be extracted or removed from their housing. It is possible, for example, to have guide rails 15r and for holding the coils 15s.
- the electrical cartridge 14 may comprise a failure detection means 14d, for example a tester for detecting a break in a filament 13.
- the failure tester can send the information to a control unit 38 in order to be able to replace the defective element.
- the electric cartridge 14 is connected to an electric battery (not shown) and to the control unit which also receives information on the temperature of the liquid from the cooling circuit 35.
- the power of the vaporization device 10 can be adjusted according to the temperature of the liquid in the cooling circuit 35.
- the electrical power required will be adjusted at each time step for calculating the control unit 38.
- the electrical power will thus be corrected for the thermal power provided by the heating of the engine water, which after a certain time (3-4 minutes) becomes sufficient to ensure the vaporization of the LPG alone. From then on, the vaporization device will be stopped.
- the power supplied to the electrical cartridge 14 can be controlled as a function of the requirements, essentially as a function of the flow rate of fuel consumed by the engine.
- the vaporization device 10 makes it possible to ensure vaporization of the liquid gas before injection into the intake channels of the engine, even during cold starts.
- the electrical consumption is reduced according to the fuel flow requirements and also according to the temperature rise of the cooling liquid circuit which is capable of heating the liquid gas and replacing the vaporization device from, for example, a threshold time or coolant temperature.
- the vaporization device has its own failure detection and is easily replaceable.
- the vaporization device can have different shapes with different lengths or sections of inlet duct 12 and electric cartridges 14, or different structures of the inlet duct 12 with for example an inlet duct formed by two cylindrical half-shells which can be attached to each other in a simple and reversible way.
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
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2021/068744 WO2023280393A1 (fr) | 2021-07-07 | 2021-07-07 | Systeme de rechauffage d'un circuit de carburant gazeux pour demarrage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4367378A1 true EP4367378A1 (fr) | 2024-05-15 |
Family
ID=76943000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21742366.4A Pending EP4367378A1 (fr) | 2021-07-07 | 2021-07-07 | Systeme de rechauffage d'un circuit de carburant gazeux pour demarrage |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4367378A1 (fr) |
| CN (1) | CN118159728A (fr) |
| WO (1) | WO2023280393A1 (fr) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10252084A1 (de) * | 2002-11-08 | 2004-05-27 | Linde Ag | Kraftstoffanlage für einen LPG-Motor |
| JP4137018B2 (ja) * | 2004-07-02 | 2008-08-20 | トヨタ自動車株式会社 | 液化ガス燃料供給システムの加熱装置 |
| JP2007205276A (ja) * | 2006-02-02 | 2007-08-16 | Keihin Corp | エンジンのガス燃料供給装置 |
| DE102008001998A1 (de) * | 2008-05-27 | 2009-12-03 | Robert Bosch Gmbh | Kraftstoffversorgungsanlage für eine gasbetriebene Brennkraftmaschine |
| KR101135527B1 (ko) * | 2009-06-05 | 2012-04-09 | 현대자동차주식회사 | 연료 처리장치를 구비한 엔진 시스템 |
| BRPI1100311B1 (pt) * | 2011-02-11 | 2022-01-04 | Magneti Marelli Sistemas Automotivos Indústria E Comércio Ltda. - Divisão Controle Motor | Conjunto aquecedor de combustível com efeito fusível |
| WO2014070027A1 (fr) * | 2012-10-31 | 2014-05-08 | Spółka Akcyjna AC | Réchauffeur d'appoint de démarrage pour le régulateur de pression et vaporiseur dans les installations automobiles d'alimentation en gaz et procédé de réchauffage d'appoint de démarrage dans les installations automobiles d'alimentation en gaz |
| FR3110198A1 (fr) * | 2020-05-15 | 2021-11-19 | Renault S.A.S | Procede d’activation de systeme de rechauffage d’un circuit de carburant gazeux pour demarrages a froid. |
-
2021
- 2021-07-07 CN CN202180100300.5A patent/CN118159728A/zh active Pending
- 2021-07-07 EP EP21742366.4A patent/EP4367378A1/fr active Pending
- 2021-07-07 WO PCT/EP2021/068744 patent/WO2023280393A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023280393A1 (fr) | 2023-01-12 |
| CN118159728A (zh) | 2024-06-07 |
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Owner name: HORSE POWERTRAIN SOLUTIONS, S.L.U. |