WO2010049966A1 - Injector rail for gaseous fuel engines - Google Patents

Injector rail for gaseous fuel engines Download PDF

Info

Publication number
WO2010049966A1
WO2010049966A1 PCT/IT2009/000486 IT2009000486W WO2010049966A1 WO 2010049966 A1 WO2010049966 A1 WO 2010049966A1 IT 2009000486 W IT2009000486 W IT 2009000486W WO 2010049966 A1 WO2010049966 A1 WO 2010049966A1
Authority
WO
WIPO (PCT)
Prior art keywords
bar
injector
gas
electric heater
engine
Prior art date
Application number
PCT/IT2009/000486
Other languages
French (fr)
Inventor
Francesco Gobbi
Original Assignee
Emer S.P.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Emer S.P.A. filed Critical Emer S.P.A.
Priority to EP09764102A priority Critical patent/EP2344747A1/en
Publication of WO2010049966A1 publication Critical patent/WO2010049966A1/en

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
    • 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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M21/0281—Adapters, sockets or the like to mount injection valves onto engines; Fuel guiding passages between injectors and the air intake system or the combustion chamber
    • 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
    • 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
    • F02M21/0203—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
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

Definitions

  • This invention concerns, in general, gas systems to run motor vehicles, and refers, in particular, to an injection bar designed apportion a correct quantity of fuel to each individual internal combustion engine cylinder fed by a gas, both LPG or methane. State of the technique
  • the fuel that in general is provided by a cylinder on board the vehicle, is distributed by means of adjustment and control valves, then passes through a pressure regulator to bring and maintain the pressure of the gas up to a pre-set level, and it is lastly fed in sequence to the engine cylinders by means of an injection system controlled by an electronic controller.
  • the injectors are usually associated with a bar, known also as a "fuel rail” or “injector rail", having basically an input duct of the gas at one of its ends, a connection for a pressure gauge at the opposite end, a connector for a temperature sensor, calibrated nozzles along one of its sides for the exit of the gas towards the engine and possibly bobbins associated with the injectors for measuring the gas in output.
  • the system in itself is functional, but however has a drawback.
  • the body of the injector bar tends to cool down, cooling at the same time the residue of gaseous. fuel left over after the motor was switched off.
  • the cooling of the injector bar and of the gas inside depends on the temperature of the atmosphere and obviously it increases in the cold periods, and is however a drawback for a correct supply of gas to the engine when the latter is subsequently started.
  • the cold gaseous fuel makes starting the engine a problem.
  • the drawback becomes even more accentuated.
  • This invention has as an objective the elimination of the drawback underlined above and therefore to make an injection bar for gas powered engines, not only functional but also highly reliable and to ensure a correct start of the motor notwithstanding the external temperature and residue of all types that remain in the bar after each stop of the engine.
  • thermoregulation of the injector bar that is to say by equipping the latter with at least an electric heater that is switched on temporarily before the engine is started to heat the injector bar and which is switched off automatically when the bar has reached a specific temperature.
  • Fig. 1 shows a schematic view of an injector bar complete with a heater
  • the injector bar comprises, as is well known, a bar body 11 that forms a longitudinal conduit which has, on one side, a gas input connection 12 and on the opposite side, a connection 13 for connecting up to a pressure gauge, not shown, and a connector 14 for a temperature sensor, also not shown.
  • the bar body 11 has a plurality of calibrated exit nozzles 15 of the gas towards the engine to be fed, whereas on one opposite side it has a group of control bobbins 16, each one associated with a nozzle 15. All controlled by an electronic controller.
  • the bar body 11 is associated with at least an electric heater 17 connected by a relative cable 17' to an electric output.
  • the electric heater 17 can be made up of a cartridge resistance housed and held in un housing 18 so as to be in contact with the bar body.
  • This housing 18 can be provided directly in the bar body or made up of a holder attached to said body as shown in the drawings.
  • the heater 17 will be conveniently managed for an automatic adjustment of the injector bar. In fact it can be activated for the engine starts, temporarily or anyway to heat up to a preset temperature of the injector bar and its content. Then it will be automatically switched off thus enabling a regular start of the engine.

Abstract

This invention concerns an injection bar for dosing fuel to each individual internal combustion engine cylinder powered by both LPG or methane gas, under the control of an electronic controller. It is characterised by the fact that it comprises at least a heating means for its thermoregulation and to heat the gaseous internal residue before the engine starts.

Description

INJECTOR RAIL FOR GASEOUS FUEL ENGINES
Field of the Invention
This invention concerns, in general, gas systems to run motor vehicles, and refers, in particular, to an injection bar designed apportion a correct quantity of fuel to each individual internal combustion engine cylinder fed by a gas, both LPG or methane. State of the technique
In engines for vehicles running on gas, the fuel, that in general is provided by a cylinder on board the vehicle, is distributed by means of adjustment and control valves, then passes through a pressure regulator to bring and maintain the pressure of the gas up to a pre-set level, and it is lastly fed in sequence to the engine cylinders by means of an injection system controlled by an electronic controller. The injectors are usually associated with a bar, known also as a "fuel rail" or "injector rail", having basically an input duct of the gas at one of its ends, a connection for a pressure gauge at the opposite end, a connector for a temperature sensor, calibrated nozzles along one of its sides for the exit of the gas towards the engine and possibly bobbins associated with the injectors for measuring the gas in output.
The system in itself is functional, but however has a drawback. In fact when the engine is stopped, the body of the injector bar tends to cool down, cooling at the same time the residue of gaseous. fuel left over after the motor was switched off. The cooling of the injector bar and of the gas inside depends on the temperature of the atmosphere and obviously it increases in the cold periods, and is however a drawback for a correct supply of gas to the engine when the latter is subsequently started. In fact, the cold gaseous fuel makes starting the engine a problem. Further, taking into consideration that in the inside of the bar substances or oily impurities may also remain, and that on cooling they tend to thicken and block the flow of the gaseous fuel from the injectors, the drawback becomes even more accentuated.
Objectives of the Invention
This invention has as an objective the elimination of the drawback underlined above and therefore to make an injection bar for gas powered engines, not only functional but also highly reliable and to ensure a correct start of the motor notwithstanding the external temperature and residue of all types that remain in the bar after each stop of the engine.
According to the invention the objective is reached through a thermoregulation of the injector bar, that is to say by equipping the latter with at least an electric heater that is switched on temporarily before the engine is started to heat the injector bar and which is switched off automatically when the bar has reached a specific temperature. Brief description of the drawings
Further details of the invention will be apparent from the continuation of this description made in reference to the enclosed schematic and purely indicative drawings, in which: . Fig. 1 shows a schematic view of an injector bar complete with a heater; and
Fig. 2 shows a view of an end of said bar. Detailed description of the Invention As shown, the injector bar comprises, as is well known, a bar body 11 that forms a longitudinal conduit which has, on one side, a gas input connection 12 and on the opposite side, a connection 13 for connecting up to a pressure gauge, not shown, and a connector 14 for a temperature sensor, also not shown. Along one of its longitudinal sides, the bar body 11 has a plurality of calibrated exit nozzles 15 of the gas towards the engine to be fed, whereas on one opposite side it has a group of control bobbins 16, each one associated with a nozzle 15. All controlled by an electronic controller.
The bar body 11 is associated with at least an electric heater 17 connected by a relative cable 17' to an electric output. For example, the electric heater 17 can be made up of a cartridge resistance housed and held in un housing 18 so as to be in contact with the bar body. This housing 18 can be provided directly in the bar body or made up of a holder attached to said body as shown in the drawings. Anyway, the heater 17 will be conveniently managed for an automatic adjustment of the injector bar. In fact it can be activated for the engine starts, temporarily or anyway to heat up to a preset temperature of the injector bar and its content. Then it will be automatically switched off thus enabling a regular start of the engine.

Claims

1. Injector bar for dosing fuel to each individual internal combustion engine cylinder supplied by a gas, both LPG or methane gas, under the control of an electronic controller, characterised by at least a heating means for its thermoregulation and to heat the gaseous internal residue before the engine starts.
2. Injector bar according to claim 1 , comprising a bar body with, at one end, a gas input connector, at the opposite end, a fitting to connect a pressure gauge and a connection for a temperature sensor; along one of its longitudinal sides has a number of nozzles adjusted for the exit of the gas towards the engine to be powered, and possibly along its opposite side a group of control coils, each one associated with a nozzle, characterised by at least one electric heater (17) which can be temporarily switched on to heat the injector bar before the engine starts and automatically switched off when the bar has reached a preset temperature.
3. Injector bar according to claim 2, characterised in that the electric heater (17) includes an electric heating element, preferably the cartridge type, inserted in a housing associated with the body bar and connected to an electric feeder run by said electronic controller.
4. Injector bar according to claim 3, characterised in that the electric heater (17) is housed in an opening provided directly in the bar body.
5. Injector bar according to claim 3, characterised in that the electric heater (17) is housed in a case attached and in contact with the bar body.
PCT/IT2009/000486 2008-10-29 2009-10-27 Injector rail for gaseous fuel engines WO2010049966A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09764102A EP2344747A1 (en) 2008-10-29 2009-10-27 Injector rail for gaseous fuel engines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2008A000194 2008-10-29
ITBS2008A000194A IT1391321B1 (en) 2008-10-29 2008-10-29 INJECTOR BAR FOR GAS-POWERED ENGINES

Publications (1)

Publication Number Publication Date
WO2010049966A1 true WO2010049966A1 (en) 2010-05-06

Family

ID=41112671

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2009/000486 WO2010049966A1 (en) 2008-10-29 2009-10-27 Injector rail for gaseous fuel engines

Country Status (3)

Country Link
EP (1) EP2344747A1 (en)
IT (1) IT1391321B1 (en)
WO (1) WO2010049966A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084323A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injector arrangement
WO2012084324A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Fuel distributor
ITUB20152789A1 (en) * 2015-08-03 2017-02-03 Metatronix S R L SYSTEM FOR THE THERMAL CONDITIONING OF A GASEOUS FUEL
ITUB20152802A1 (en) * 2015-08-03 2017-02-03 Metatronix S R L SYSTEM FOR THE THERMAL CONDITIONING OF A GASEOUS FUEL
WO2018219604A1 (en) * 2017-05-27 2018-12-06 Robert Bosch Gmbh Fuel injection device and fuel heating method
WO2023169932A1 (en) * 2022-03-08 2023-09-14 Renault S.A.S. Power unit with heated fuel rail

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318861A (en) * 1996-10-30 1998-05-06 Honda Motor Co Ltd Insulated gas storage vessel for supplying an engine
DE20113323U1 (en) * 2001-08-20 2003-01-02 Winkelmann Karlheinrich Fuel preheater for internal combustion engines comprises a heat exchanger, through which the fuel of an internal combustion engine is pumped, heat exchanger being preheated by engine oil before being injected into the cylinder head
JP2005163728A (en) * 2003-12-04 2005-06-23 Toyota Motor Corp Gas fuel engine
JP2005273585A (en) * 2004-03-25 2005-10-06 Toyota Motor Corp Odorant processing unit of gaseous fuel engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2318861A (en) * 1996-10-30 1998-05-06 Honda Motor Co Ltd Insulated gas storage vessel for supplying an engine
DE20113323U1 (en) * 2001-08-20 2003-01-02 Winkelmann Karlheinrich Fuel preheater for internal combustion engines comprises a heat exchanger, through which the fuel of an internal combustion engine is pumped, heat exchanger being preheated by engine oil before being injected into the cylinder head
JP2005163728A (en) * 2003-12-04 2005-06-23 Toyota Motor Corp Gas fuel engine
JP2005273585A (en) * 2004-03-25 2005-10-06 Toyota Motor Corp Odorant processing unit of gaseous fuel engine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084323A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injector arrangement
WO2012084324A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Fuel distributor
CN103429883A (en) * 2010-12-23 2013-12-04 罗伯特·博世有限公司 Fuel distributor
CN103429884A (en) * 2010-12-23 2013-12-04 罗伯特·博世有限公司 Injector arrangement
US9745938B2 (en) 2010-12-23 2017-08-29 Robert Bosch Gmbh Injector system
ITUB20152789A1 (en) * 2015-08-03 2017-02-03 Metatronix S R L SYSTEM FOR THE THERMAL CONDITIONING OF A GASEOUS FUEL
ITUB20152802A1 (en) * 2015-08-03 2017-02-03 Metatronix S R L SYSTEM FOR THE THERMAL CONDITIONING OF A GASEOUS FUEL
EP3128166A1 (en) * 2015-08-03 2017-02-08 Metatronix S.r.l. System for thermally conditioning gaseous fuel
WO2018219604A1 (en) * 2017-05-27 2018-12-06 Robert Bosch Gmbh Fuel injection device and fuel heating method
WO2023169932A1 (en) * 2022-03-08 2023-09-14 Renault S.A.S. Power unit with heated fuel rail
FR3133413A1 (en) * 2022-03-08 2023-09-15 Renault S.A.S Powertrain features heated fuel rail

Also Published As

Publication number Publication date
IT1391321B1 (en) 2011-12-05
EP2344747A1 (en) 2011-07-20
ITBS20080194A1 (en) 2010-04-30

Similar Documents

Publication Publication Date Title
WO2010049966A1 (en) Injector rail for gaseous fuel engines
US20020092505A1 (en) Fuel supply apparatus for an internal combustion engine
JP4534866B2 (en) Engine control device
US4936280A (en) Electronic dual fuel injection system
US20090107473A1 (en) Cold start structure for multipoint fuel injection systems
EP0925438B1 (en) Fuel injection device for an internal combustion engine
WO2008075668A1 (en) Fuel supply device for internal combustion engine and control device for the fuel supply device
EP2194261B1 (en) Fuel rail equipped with an axial heater device layout for engine cold start operation with ethanol
US9765717B2 (en) Gaseous fuel conversion system for marine vessels, and related accessories
CN211598881U (en) Fuel system for diesel engine, diesel engine with fuel system and vehicle
EP3111076A1 (en) Fuel supply system for internal combustion engines
KR101087372B1 (en) Device for feeding fuel from a reservoir to an internal combustion engine and method for detecting pressure
US10309284B2 (en) Method of regenerating an exhaust gas purification filter, and vaporizer
US20100176111A1 (en) Vehicle heater system and method
JP7033616B2 (en) A system that adapts an internal combustion engine to be driven by gas-phase gaseous fuel and liquid-phase gaseous fuel.
US10823117B2 (en) Water injection device for an internal combustion engine and water injection method
EP3249206B1 (en) System for adapting an internal combustion engine to be powered by gaseous fuel in gas phase and by gaseous fuel in liquid phase
RU108499U1 (en) INTERNAL COMBUSTION ENGINE POWER SYSTEM WITH LIQUEFIED GAS FUEL
EP1598546B1 (en) Fuel Rail Component
CN110578624A (en) Water injection device for internal combustion engine and method for water injection
CN214366473U (en) Dual-fuel supply system and engine with same
JP5698441B2 (en) Gas fuel supply device
KR100824256B1 (en) Lpg preheater for improving performance of starter
WO2009062228A1 (en) Fuel delivery apparatus and method
KR200434371Y1 (en) Heat Cover for Fuel Tank

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09764102

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2009764102

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE