EP2344747A1 - Injector rail for gaseous fuel engines - Google Patents

Injector rail for gaseous fuel engines

Info

Publication number
EP2344747A1
EP2344747A1 EP09764102A EP09764102A EP2344747A1 EP 2344747 A1 EP2344747 A1 EP 2344747A1 EP 09764102 A EP09764102 A EP 09764102A EP 09764102 A EP09764102 A EP 09764102A EP 2344747 A1 EP2344747 A1 EP 2344747A1
Authority
EP
European Patent Office
Prior art keywords
bar
injector
gas
electric heater
engine
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.)
Withdrawn
Application number
EP09764102A
Other languages
German (de)
French (fr)
Inventor
Francesco Gobbi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emer SpA
Original Assignee
Emer SpA
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 SpA filed Critical Emer SpA
Publication of EP2344747A1 publication Critical patent/EP2344747A1/en
Withdrawn legal-status Critical Current

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.

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)
  • Fuel-Injection Apparatus (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

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.
EP09764102A 2008-10-29 2009-10-27 Injector rail for gaseous fuel engines Withdrawn EP2344747A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2008A000194A IT1391321B1 (en) 2008-10-29 2008-10-29 INJECTOR BAR FOR GAS-POWERED ENGINES
PCT/IT2009/000486 WO2010049966A1 (en) 2008-10-29 2009-10-27 Injector rail for gaseous fuel engines

Publications (1)

Publication Number Publication Date
EP2344747A1 true EP2344747A1 (en) 2011-07-20

Family

ID=41112671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09764102A Withdrawn EP2344747A1 (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)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064115A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh Injector arrangement, which preferably serves for natural gas
DE102010064121A1 (en) * 2010-12-23 2012-06-28 Robert Bosch Gmbh fuel feeder
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
CN108930612A (en) * 2017-05-27 2018-12-04 罗伯特·博世有限公司 Fuel injection device and fuel heating means
FR3133413A1 (en) * 2022-03-08 2023-09-15 Renault S.A.S Powertrain features heated fuel rail

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10131809A (en) * 1996-10-30 1998-05-19 Honda Motor Co Ltd Gas engine and gas engine working machine
DE20113323U1 (en) * 2001-08-20 2003-01-02 Winkelmann, Karlheinrich, Dipl.-Ing. (TH), 33617 Bielefeld 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 treatment device for gas fuel engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010049966A1 *

Also Published As

Publication number Publication date
WO2010049966A1 (en) 2010-05-06
IT1391321B1 (en) 2011-12-05
ITBS20080194A1 (en) 2010-04-30

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