WO2010025794A1 - Fuel injection apparatus for internal combustion engines - Google Patents

Fuel injection apparatus for internal combustion engines Download PDF

Info

Publication number
WO2010025794A1
WO2010025794A1 PCT/EP2009/005435 EP2009005435W WO2010025794A1 WO 2010025794 A1 WO2010025794 A1 WO 2010025794A1 EP 2009005435 W EP2009005435 W EP 2009005435W WO 2010025794 A1 WO2010025794 A1 WO 2010025794A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
fuel injection
injection apparatus
internal combustion
combustion engines
Prior art date
Application number
PCT/EP2009/005435
Other languages
French (fr)
Inventor
Massimiliano Melis
Matteo Allasia
Davide Donna
Original Assignee
Gm Global Technology Operations, Inc.
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 Gm Global Technology Operations, Inc. filed Critical Gm Global Technology Operations, Inc.
Publication of WO2010025794A1 publication Critical patent/WO2010025794A1/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of common rails
    • F02M63/028—Returnless common rail system

Definitions

  • the present invention relates to a fuel injection apparatus for internal combustion engines according to the preamble of claim 1.
  • Conventional internal combustion engines are provided' with a fuel injection apparatus which comprises a plurality of injectors and a high pressure conduit, the so called rail, to supply said injectors with high pressure fuel.
  • the rail is connected to the injectors through respective supply pipes.
  • this rail which is made up of iron, has a typical volume comprised in the range from 15 to 20cc and a weight of 2kg, and is quite expensive.
  • figure 1 is a schematic representation of a fuel injection apparatus according to the invention
  • figure 2 is a schematic representation in grater detail of the fuel injection apparatus of figure 1.
  • reference numeral 1 generally indicates a fuel injection apparatus according to the invention, said apparatus 1 being arranged to connect a high pressure pump 2 with a plurality of injectors 4 through respective supply pipes 4a.
  • the high pressure pump 2 is arranged to send fuel at a high pressure through the fuel injector apparatus 1 so as to supply the injectors 4.
  • the fuel injection apparatus 1 comprises a first T-connection 5 and a second T-connection 6 connected with each other through one high pressure pipe 7.
  • Each T-connection 5,6 comprises respectively two outlets 8a, 8b for connecting respective supply pipes 4a.
  • the first T-connection 5 has an inlet 10 arranged to receive the fuel from the pump 2.
  • the second T-connection 6 has a first seat 12 housing a pressure sensor and a second seat 14 housing a pressure limiting valve not shown in figure.
  • the high pressure pipe 7 has a volume comprised in the range from 3 to 5cc and a weight of 0.5kg.
  • the high pressure pipe 7 has an internal diameter of 3mm, an external diameter of 6,35mm and a length of 100mm.
  • said pipe 7 is made up of EN355.

Abstract

Fuel injection apparatus (1) for internal combustion engines comprising a plurality of injectors (4), the apparatus (1) being connected to the injectors (4) through respective supply pipes (4a), the fuel injection apparatus (1) being characterized in that it comprises: - a first T-connection (5) and a second T-connection (6), each T-connection (5,6) having respective outlets (8a, 8b) for connection with respective supply pipes (4a), the first T-connection (5) comprising an inlet (10) to receive high pressure fuel; a high pressure pipe (7) for connecting the first T- connection (5) to the second T-connection (6).

Description

Fuel injection apparatus for internal combustion engines
The present invention relates to a fuel injection apparatus for internal combustion engines according to the preamble of claim 1.
Conventional internal combustion engines are provided' with a fuel injection apparatus which comprises a plurality of injectors and a high pressure conduit, the so called rail, to supply said injectors with high pressure fuel. The rail is connected to the injectors through respective supply pipes.
The drawbacks of such architecture is that this rail, which is made up of iron, has a typical volume comprised in the range from 15 to 20cc and a weight of 2kg, and is quite expensive.
In view of the above, it is an object of the present invention to provide an alternative fuel injection system which has a reduced volume and is less expensive.
This and other objects are achieved according to the present invention by the fuel injection apparatus of claim 1.
Advantageous embodiments are the subject of the dependent claims, whose content is to be understood as integral or integrating part of the present description.
Further characteristics and advantages of the invention will become apparent from the following description, provided merely by way of a non-limiting example, with reference to the accompanying drawing, in which figure 1 is a schematic representation of a fuel injection apparatus according to the invention; and figure 2 is a schematic representation in grater detail of the fuel injection apparatus of figure 1.
In figure 1 reference numeral 1 generally indicates a fuel injection apparatus according to the invention, said apparatus 1 being arranged to connect a high pressure pump 2 with a plurality of injectors 4 through respective supply pipes 4a. The high pressure pump 2 is arranged to send fuel at a high pressure through the fuel injector apparatus 1 so as to supply the injectors 4.
In figure 2 the fuel injection apparatus 1 comprises a first T-connection 5 and a second T-connection 6 connected with each other through one high pressure pipe 7.
Each T-connection 5,6 comprises respectively two outlets 8a, 8b for connecting respective supply pipes 4a.
The first T-connection 5 has an inlet 10 arranged to receive the fuel from the pump 2. The second T-connection 6 has a first seat 12 housing a pressure sensor and a second seat 14 housing a pressure limiting valve not shown in figure.
Advantageously, the high pressure pipe 7 has a volume comprised in the range from 3 to 5cc and a weight of 0.5kg. Particularly, the high pressure pipe 7 has an internal diameter of 3mm, an external diameter of 6,35mm and a length of 100mm. Furthermore, said pipe 7 is made up of EN355. Clearly, the principle of the invention remaining the same, the embodiments and the details of production can be varied considerably from what has been described and illustrated purely by way of non-limiting example, without departing from the scope of protection of the present invention as defined by the attached claims.

Claims

1. Fuel injection apparatus (1) for internal combustion engines comprising a plurality of injectors (4), said apparatus (1) being connected to the injectors (4) through respective supply pipes (4a), said fuel injection apparatus (1) being characterized in that it comprises:
- a first T-connection (5) and a second T-connection (6), each T-connection (5,6) having respective outlets (8a, 8b) for connection with respective supply pipes (4a) , said first T-connection (5) comprising an inlet (10) to receive high pressure fuel;
- a high pressure pipe (7) connecting the first T-connection
(5) to the second T-connection (6) .
2. The fuel apparatus of claim 1, comprising a pressure sensor housed in a first seat (12) in the second T-connection
(6) .
3. The fuel apparatus of claim 1 or 2, comprising a pressure limiting valve housed in a second seat (14) in the second T- connection ( 6) .
PCT/EP2009/005435 2008-09-05 2009-07-27 Fuel injection apparatus for internal combustion engines WO2010025794A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0816163.0A GB2463256B (en) 2008-09-05 2008-09-05 Fuel injection apparatus for internal combustion engines
GB0816163.0 2008-09-05

Publications (1)

Publication Number Publication Date
WO2010025794A1 true WO2010025794A1 (en) 2010-03-11

Family

ID=39888802

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/005435 WO2010025794A1 (en) 2008-09-05 2009-07-27 Fuel injection apparatus for internal combustion engines

Country Status (2)

Country Link
GB (1) GB2463256B (en)
WO (1) WO2010025794A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747736C1 (en) * 1997-10-29 1999-04-08 Siemens Ag Pressure reservoir for IC engine common-rail fuel injection supply system
DE10161920A1 (en) * 2001-12-17 2002-09-26 Bosch Gmbh Robert Diesel engine modular high pressure fuel reservoir
DE10314029A1 (en) * 2003-03-28 2004-10-07 Deutz Ag Internal combustion engine with a memory injection system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801342A1 (en) * 1978-01-13 1979-07-19 Kloeckner Humboldt Deutz Ag DIESEL COMBUSTION ENGINE
JPS58131338A (en) * 1982-01-31 1983-08-05 Hino Motors Ltd Fuel supplying apparatus for diesel engine
JP3293269B2 (en) * 1993-10-06 2002-06-17 株式会社デンソー Pressure supply device
DE10101476A1 (en) * 2001-01-12 2002-07-25 Bosch Gmbh Robert Common rail unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747736C1 (en) * 1997-10-29 1999-04-08 Siemens Ag Pressure reservoir for IC engine common-rail fuel injection supply system
DE10161920A1 (en) * 2001-12-17 2002-09-26 Bosch Gmbh Robert Diesel engine modular high pressure fuel reservoir
DE10314029A1 (en) * 2003-03-28 2004-10-07 Deutz Ag Internal combustion engine with a memory injection system

Also Published As

Publication number Publication date
GB2463256B (en) 2012-10-31
GB0816163D0 (en) 2008-10-15
GB2463256A (en) 2010-03-10

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