GB2463256A - Apparatus for connecting a high pressure pump to the fuel injectors of an i.c. engine - Google Patents
Apparatus for connecting a high pressure pump to the fuel injectors of an i.c. engine Download PDFInfo
- Publication number
- GB2463256A GB2463256A GB0816163A GB0816163A GB2463256A GB 2463256 A GB2463256 A GB 2463256A GB 0816163 A GB0816163 A GB 0816163A GB 0816163 A GB0816163 A GB 0816163A GB 2463256 A GB2463256 A GB 2463256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- connection
- high pressure
- fuel
- seat
- fuel injection
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A high pressure fuel pump 2 is connected to a plurality of fuel injectors 4 by respective supply pipes 4a which are connected in groups to outlets 8a, 8b of two T-connections 5,6 which are connected to each other by a high-pressure pipe 7. The first T-connection 5 has an inlet 10 for connection to the pump 2. The second T-connection may have a seat 12 housing a pressure sensor and a seat 14 housing a pressure limiting valve. The high-pressure pipe 7 may have a volume of 3-5cc and a weight of 0.5kg. The apparatus is intended to have lower volume, weight and cost than conventional common rails.
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 (3)
- CLAIMS1. Fuel injection apparatus (I) 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 (I) 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 1-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-comiection (6).
Priority Applications (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 |
| PCT/EP2009/005435 WO2010025794A1 (en) | 2008-09-05 | 2009-07-27 | Fuel injection apparatus for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0816163.0A GB2463256B (en) | 2008-09-05 | 2008-09-05 | Fuel injection apparatus for internal combustion engines |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0816163D0 GB0816163D0 (en) | 2008-10-15 |
| GB2463256A true GB2463256A (en) | 2010-03-10 |
| GB2463256B GB2463256B (en) | 2012-10-31 |
Family
ID=39888802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0816163.0A Expired - Fee Related GB2463256B (en) | 2008-09-05 | 2008-09-05 | Fuel injection apparatus for internal combustion engines |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2463256B (en) |
| WO (1) | WO2010025794A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2012355A (en) * | 1978-01-13 | 1979-07-25 | Kloeckner Humboldt Deutz Ag | Multi-Cylinder Diesel Type Internal Combustion Engine |
| JPS58131338A (en) * | 1982-01-31 | 1983-08-05 | Hino Motors Ltd | Fuel supplying apparatus for diesel engine |
| US5592968A (en) * | 1993-10-06 | 1997-01-14 | Nippondenso Co., Ltd. | Pressure supply device |
| WO2002055868A1 (en) * | 2001-01-12 | 2002-07-18 | Robert Bosch Gmbh | Common rail unit |
Family Cites Families (3)
| 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 |
-
2008
- 2008-09-05 GB GB0816163.0A patent/GB2463256B/en not_active Expired - Fee Related
-
2009
- 2009-07-27 WO PCT/EP2009/005435 patent/WO2010025794A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2012355A (en) * | 1978-01-13 | 1979-07-25 | Kloeckner Humboldt Deutz Ag | Multi-Cylinder Diesel Type Internal Combustion Engine |
| JPS58131338A (en) * | 1982-01-31 | 1983-08-05 | Hino Motors Ltd | Fuel supplying apparatus for diesel engine |
| US5592968A (en) * | 1993-10-06 | 1997-01-14 | Nippondenso Co., Ltd. | Pressure supply device |
| WO2002055868A1 (en) * | 2001-01-12 | 2002-07-18 | Robert Bosch Gmbh | Common rail unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010025794A1 (en) | 2010-03-11 |
| GB2463256B (en) | 2012-10-31 |
| GB0816163D0 (en) | 2008-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S30Z | Assignments for licence or security reasons |
Free format text: APPLICANT GM GLOBAL TECHNOLOGY OPERATIONS, INC SECURITY TO THE UNITED STATES DEPARTMENT OF THE TREASURY |
|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20180905 |