EP1537334A1 - Pump, especially for a fuel injection device for an internal combustion engine - Google Patents
Pump, especially for a fuel injection device for an internal combustion engineInfo
- Publication number
- EP1537334A1 EP1537334A1 EP03739364A EP03739364A EP1537334A1 EP 1537334 A1 EP1537334 A1 EP 1537334A1 EP 03739364 A EP03739364 A EP 03739364A EP 03739364 A EP03739364 A EP 03739364A EP 1537334 A1 EP1537334 A1 EP 1537334A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- bore
- blind bore
- housing part
- valve
- 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
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
-
- 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
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Definitions
- the invention relates to a pump, in particular for a fuel injection device for an internal combustion engine according to the preamble of claim 1.
- Such a pump is known from DE 198 48 035 AI.
- This pump has at least one pump element with a pump piston which is tightly guided in a cylinder bore of a housing part and which delimits a pump working space in the cylinder bore with its end face.
- the pump piston is driven in one stroke.
- the pump workspace has one in the
- the inlet valve has a valve member which interacts with a valve seat and is acted upon by a valve spring towards the valve seat.
- the part of the inlet channel which opens into the pump work space is formed by a separate component which is inserted into a bore in the housing part and on which the valve seat is also formed.
- Housing part is ' closed with a screw plug. Because of the many individual parts, the manufacture and assembly of the known pump is complex and expensive. Advantages of the invention
- the pump according to the invention with the features according to claim 1 has the advantage that it is simple and inexpensive to manufacture and assemble, since the number of its individual parts is reduced.
- FIG. 1 shows a pump in a longitudinal section
- FIG. 2 shows a section of the pump designated II in FIG. 1 in an enlarged representation.
- FIG. 1 and 2 show a pump which is provided in particular for a fuel injection device for an internal combustion engine, for example of a motor vehicle.
- the pump delivers fuel under high pressure of up to 2000 bar, for example into a storage tank.
- the pump has a housing which has, for example, a housing part 10 and a flange part 11 connected to it.
- a drive shaft 12 is arranged in the housing and drives one or more pump elements 14 arranged in the housing.
- a plurality of pump elements 14 are preferably arranged distributed over the circumference of the drive shaft 12.
- the drive shaft 12 is via a bearing 16 in the housing part 10 and a bearing 18 in the flange part 11 rotatably mounted about an axis 13 and is driven in a manner not shown by the internal combustion engine.
- the drive shaft 12 has an eccentric section 20 on which a cam ring 22 is mounted.
- the pump element 14 has a pump piston 24, which is displaceably and sealingly guided in a cylinder bore 26 of the housing part 10 which extends at least approximately radially to the drive shaft 12.
- the pump piston 24 is supported with its piston foot 25 on the cam ring 22, the piston foot 25 being held in contact with the cam ring 22 by a spring 28 which is supported on the one hand on the housing part 10 and on the other hand on the piston foot 25.
- a pump working space 30 is delimited by the pump piston 24 in the cylinder bore 26 with its end face.
- the pump working space 30 is connectable to an inlet fuel valve 34 through an inlet valve 32 opening into the pump working space 30, in which low pressure prevails.
- the pump working space 30 can also be connected to the accumulator by means of an outlet valve 36 opening towards the accumulator via a fuel drain channel 38 running in the housing part 10.
- a first blind bore 42 adjoins the pump work chamber 30, which is arranged in the end region of the cylinder bore 26 that is radially remote from the drive shaft 12, as part of the fuel inlet channel 34.
- the first blind bore 42 has a smaller diameter than the cylinder bore 26 and preferably runs at least approximately coaxially with the cylinder bore 26.
- the first blind bore 42 ends within the housing part 10. The transition from the cylinder bore 26 to the first blind bore 42 is, for example, at least approximately conical and forms a valve seat 44 for the inlet valve 32.
- the inlet valve 32 has a valve member 46, which is designed, for example, as a ball and which interacts with the valve seat 44 for controlling the connection of the pump work chamber 30 to the fuel inlet channel 34.
- the valve member 46 is urged toward the valve seat 44 by a preloaded valve spring 48, for example in the form of a helical compression spring.
- a support element in the form of a spring plate can be arranged between the valve spring 48 and the valve member 46.
- the valve spring 48 can be supported in a stationary manner on the housing part 10 or, as shown in the figure, on the end face of the pump piston 24.
- a second blind bore 50 which also is introduced into the housing part 10 and ends in the housing part 10, opens into the first blind hole 42.
- the second blind hole 50 is inclined to the first blind hole 42, preferably at least approximately perpendicular to the first blind hole 42 and at least approximately parallel to the axis of rotation 13 of the drive shaft 12.
- the second blind hole 50 is made from a side surface 52 of the housing part 10 facing the flange part 11. In the flange 11, the
- a sealing element 58 can be clamped in at the transition of the fuel channel 34 between the flange part 11 and the housing part 10.
- the mutually facing side surfaces 52 and 54 of the housing part 10 and the flange part 11 run, for example, at least approximately perpendicular to the axis of rotation 13 of the drive shaft 12 and can be flat.
- the housing part 10 and the flange part 11 are connected to one another in a manner not shown, for example by means of several screws.
- blind bores 42 and 50 can be introduced into the housing part 10 in a simple manner from the cylinder bore 26 or from the side surface 52.
- the housing part 10 has no openings for the fuel channel 34 on its outside.
- the inlet valve 32 only the valve member 46 and the valve spring 48 as well as the supporting element arranged between them are required as additional components. It can be provided that a common housing part 10 is provided for several pump elements 14, in which in a corresponding
- Number of cylinder bores 26 and blind bores 42 and 50 are introduced.
- a separate housing part 10 is provided for each pump element 14. in each of which only one cylinder bore 26 and one blind bore 42, 50 are introduced.
- the housing parts 10 of the pump elements 14 are then connected to one another in a suitable manner.
- a bore 60 opens into the pump working chamber 30 in the cylinder bore 26, said bore 60 being at least approximately perpendicular to the longitudinal axis of the Cylinder bore 26 runs.
- the bore 60 has a stepped diameter, the end portion of which opens into the pump working space 30 has a small diameter.
- a central section of the bore 60 adjoins the end section away from the pump work chamber 30, the transition between the end section and the central section being able to be approximately conical, for example, and forming a valve seat 62 for the outlet valve 36.
- a valve member 64 of the outlet valve 36 for example in the form of a ball, cooperates with the valve seat 62 to control the connection of the pump working chamber 30 to the fuel drain channel 38.
- a screw plug 66 is screwed into an outer section of the bore 60 which is further enlarged in diameter compared to the central section and is provided with an internal thread.
- a prestressed valve spring 68 for example in the form of a helical compression spring, is clamped between the screw plug 66 and the valve member 64, through which the valve member 64 is urged toward the valve seat 62.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10239728A DE10239728A1 (en) | 2002-08-29 | 2002-08-29 | Pump, in particular for a fuel injection device for an internal combustion engine |
DE10239728 | 2002-08-29 | ||
PCT/DE2003/000383 WO2004022975A1 (en) | 2002-08-29 | 2003-02-11 | Pump, especially for a fuel injection device for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1537334A1 true EP1537334A1 (en) | 2005-06-08 |
EP1537334B1 EP1537334B1 (en) | 2010-10-13 |
Family
ID=31502103
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03739364A Expired - Lifetime EP1537334B1 (en) | 2002-08-29 | 2003-02-11 | Pump, especially for a fuel injection device for an internal combustion engine |
Country Status (5)
Country | Link |
---|---|
US (1) | US7210463B2 (en) |
EP (1) | EP1537334B1 (en) |
JP (1) | JP4309840B2 (en) |
DE (2) | DE10239728A1 (en) |
WO (1) | WO2004022975A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004028999A1 (en) * | 2004-06-16 | 2006-01-05 | Robert Bosch Gmbh | High-pressure pump for a fuel injection device of an internal combustion engine |
EP1813844A1 (en) * | 2006-01-31 | 2007-08-01 | Centro Studi Componenti per Veicoli S.P.A. | High-pressure piston pump for delivering fuel to a common rail of an internal combustion engine |
DE102008043217A1 (en) * | 2008-10-28 | 2010-04-29 | Robert Bosch Gmbh | High-pressure fuel pump for an internal combustion engine |
WO2013010458A1 (en) * | 2011-07-14 | 2013-01-24 | Neo Mechanics Limited | Diesel engine fuel injection pump which pistons are sealed with all metal seal rings |
ITMI20132109A1 (en) * | 2013-12-17 | 2015-06-18 | Bosch Gmbh Robert | PUMP ASSEMBLY TO SUPPLY FUEL, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
US10012228B2 (en) * | 2014-04-17 | 2018-07-03 | Danfoss Power Solutions Gmbh & Co. Ohg | Variable fluid flow hydraulic pump |
GB2555599A (en) * | 2016-11-02 | 2018-05-09 | Delphi Int Operations Luxembourg Sarl | Fuel pump |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1218675B (en) * | 1987-08-25 | 1990-04-19 | Weber Srl | RADIAL PUMP PUMP IN PARTICULAR PUMP FOR INJECTION OF FUEL IN DIESEL CYCLE ENGINES |
IT239879Y1 (en) * | 1996-12-23 | 2001-03-13 | Elasis Sistema Ricerca Fiat | REFINEMENTS TO A PISTON PUMP, IN PARTICULAR TO A RADIAL APISTON PUMP FOR THE FUEL OF AN INTERNAL COMBUSTION ENGINE. |
DE19801353A1 (en) * | 1998-01-16 | 1999-07-22 | Bosch Gmbh Robert | Radial piston pump providing HP fuel for fuel injection systems of internal combustion engines, especially with common rail injection system |
DE19848035A1 (en) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radial piston pump for high fuel pressure in IC engines with common-rail injection system has suction valve closure spring supported on pump piston and contained in long piston bore |
JP4088738B2 (en) | 1998-12-25 | 2008-05-21 | 株式会社デンソー | Fuel injection pump |
IT1310755B1 (en) * | 1999-11-30 | 2002-02-22 | Elasis Sistema Ricerca Fiat | HIGH PRESSURE HYDRAULIC PUMP, IN PARTICULAR RUBBER PISTON PUMP FOR THE FUEL OF AN INTERNAL COMBUSTION ENGINE. |
DE10117600C1 (en) | 2001-04-07 | 2002-08-22 | Bosch Gmbh Robert | High-pressure fuel pump for a fuel system of a direct-injection internal combustion engine, fuel system and internal combustion engine |
US20040022654A1 (en) * | 2002-08-05 | 2004-02-05 | Takashi Ishida | Piston type small discharge pump |
-
2002
- 2002-08-29 DE DE10239728A patent/DE10239728A1/en not_active Withdrawn
-
2003
- 2003-02-11 WO PCT/DE2003/000383 patent/WO2004022975A1/en active Application Filing
- 2003-02-11 DE DE50313186T patent/DE50313186D1/en not_active Expired - Lifetime
- 2003-02-11 JP JP2004533186A patent/JP4309840B2/en not_active Expired - Fee Related
- 2003-02-11 EP EP03739364A patent/EP1537334B1/en not_active Expired - Lifetime
- 2003-02-11 US US10/493,951 patent/US7210463B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2004022975A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4309840B2 (en) | 2009-08-05 |
DE50313186D1 (en) | 2010-11-25 |
DE10239728A1 (en) | 2004-03-11 |
US7210463B2 (en) | 2007-05-01 |
EP1537334B1 (en) | 2010-10-13 |
WO2004022975A1 (en) | 2004-03-18 |
US20050031478A1 (en) | 2005-02-10 |
JP2005537425A (en) | 2005-12-08 |
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