WO1999002861A1 - Einlassventil für eine radialkolbenpumpe zur kraftstoffhochdruckversorgung - Google Patents
Einlassventil für eine radialkolbenpumpe zur kraftstoffhochdruckversorgung Download PDFInfo
- Publication number
- WO1999002861A1 WO1999002861A1 PCT/DE1998/001918 DE9801918W WO9902861A1 WO 1999002861 A1 WO1999002861 A1 WO 1999002861A1 DE 9801918 W DE9801918 W DE 9801918W WO 9902861 A1 WO9902861 A1 WO 9902861A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve plate
- piston pump
- tappet
- radial piston
- drive shaft
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
- F04B53/101—Ball valves having means for limiting the opening height
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
-
- 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
-
- 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
- F04B53/10—Valves; Arrangement of valves
- F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7504—Removable valve head and seat unit
- Y10T137/7559—Pump type
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7504—Removable valve head and seat unit
- Y10T137/7613—Threaded into valve casing
Definitions
- the invention relates to a radial piston pump for high-pressure fuel supply in Kraf fuel injection systems of internal combustion engines, in particular in a common rail injection system, with a drive shaft mounted in a pump housing, which is eccentrically formed or has a plurality of cam-like elevations in the circumferential direction, and preferably with a plurality of radial with respect to the drive shaft Pistons arranged in a respective cylinder space, which can be moved back and forth in the cylinder space in the radial direction when the drive shaft is rotated, the respective cylinder space being closed radially on the outside with respect to the drive shaft by a valve plate having a suction-side check valve and a high-pressure side check valve.
- Such a radial piston pump is known from DE 44 01 074 AI.
- the check valve is provided on the side of the valve plate facing the cylinder space in a diameter-enlarged section of the cylinder space.
- a valve body which can be placed against a sealing seat of the valve plate or can be lifted off the sealing seat is accommodated in a basket-shaped or pot-shaped component which extends into the cylinder space in the direction of the respective piston and is fastened to the valve plate.
- the valve body is pressed in the direction of the valve plate via a plate spring provided on the bottom of the cup-shaped component.
- the present invention is based on the task of increasing its efficiency.
- suction-side check valve has a tappet which extends through the valve plate and which has on its side facing the cylinder chamber a valve disk which can be sealed against a sealing seat of the valve plate, and that on the side facing away from the cylinder chamber the valve plate is provided with a device that prestresses the tappet in the closing direction.
- the dead space limiting the piston stroke ie the installation space of the check valve on the suction side, is essential reduced.
- the stroke of the pump piston was limited by the outside of the cup-shaped component.
- the piston can now extend during the compression phase to at least almost the outside of the valve plate of the check valve, that is to say even up to the stroke area of the valve plate of the check valve.
- the dead volume is therefore minimal and the efficiency of the radial piston pump is greater than that of the previously known pump.
- the device which prestresses the tappet in the closing direction comprises a spring which is supported at one end on the side of the valve plate facing away from the cylinder space and at the other end on an abutment provided on the tappet,
- the arrangement of the device prestressing the tappet in the closing direction on the side of the valve plate facing away from the cylinder space has the advantage that the device can be designed in any way in itself to provide a desired opening pressure for the check valve.
- the abutment for the spring could be realized in any way;
- an axial stop could be provided on the tappet, for example by compression or notching.
- the abutment is formed by a collar bushing element, the bushing section of which concentrically surrounds the plunger and against it Collar section the spring is supported. This opens up the possibility of pushing the abutment onto the ram and fixing it at the desired location.
- the abutment could be set in any way. However, it has proven to be advantageous if the abutment is attached to the plunger in a form-fitting manner, in particular by means of a flaring operation.
- a spring with a specific dimension or spring constant could be selected to specify the opening pressure of the check valve.
- an abutment in the form of the collar bushing element mentioned above proves to be advantageous.
- the abutment is formed by a disk-shaped or plate-shaped component bearing against an axial stop on the tappet, for example by a slotted locking washer or the like, which can be snapped onto the tappet.
- axial stops could be provided on the tappet at different axial positions.
- an axial stop for example in the form of a circumferential direction running annular groove, to provide and keep several lock washers of different thickness ready and depending on the requirements for the opening pressure. The thickness of a lock washer is easy to determine and therefore the choice when installing the check valve is easy.
- valve plate In order to be able to make optimum use of the installation space on the side of the valve plate facing away from the cylinder chamber, it has proven to be advantageous if at least one opening which is essentially radial to the longitudinal direction of the cylinder chamber and communicates with a fuel supply opening in the housing is provided in the valve plate.
- the fuel is not supplied from the outside with respect to the drive shaft, but rather the fuel is supplied via an opening running in the plane of the valve plate. This radial opening then preferably opens into the tappet passage opening of the valve plate.
- Figure 1 is a sectional view of a radial piston pump according to the invention.
- Figure 2 is a sectional view of the plane II -II in Figure 1;
- FIG 3 is a sectional view of a valve plate Check valve as it is used in the radial piston pump according to Figures 1 and 2 in a slightly different version and
- Figure 4 shows a further embodiment of a valve plate with an intake-side check valve.
- FIGS 1 and 2 show a radial piston pump for supplying high-pressure fuel in fuel injection systems of internal combustion engines.
- the radial piston pump comprises a housing-forming component 2 in which a drive shaft 4 with an eccentric shaft section 6 is rotatably mounted via bearing components shown in the figures.
- a sliding bush 8 is provided around the eccentric shaft section 6, in which the eccentric shaft section 6 rotates.
- the sliding bushing 8 On its circumference 3, the sliding bushing 8 has flats 10, each offset by 120 °, against which a respective piston 12 is supported with an intermediate pressure piece 16 having a flat contact surface 14.
- the respective piston 12 is mounted in a cylinder space 18 so that it can move back and forth in the radial direction to the drive shaft 4.
- the cylinder chamber 18 is formed by a bearing component 20 inserted into the housing component 2 in the radial direction of the drive shaft 4, this bearing component 20 having a through opening 22 for this purpose.
- the radially outer end of the through opening 22 to the drive shaft 4 is of one shown in detail in FIG. 3 Closed valve plate 24 which lies flat against the radially outer side of the bearing component 20.
- An intake-side check valve, designated overall by reference numeral 26, and a high-pressure check valve 28 are integrated in the valve plate 24.
- the suction-side check valve 26 comprises a tappet 30, which has a valve plate 32 at its end facing the cylinder chamber 18 and extends through a through opening 34 in the valve plate 24.
- the valve plate 30 can be sealingly placed against a sealing seat 36 on the side of the valve plate 24 facing the cylinder chamber 18.
- a device generally designated by the reference symbol 38, is provided for pretensioning the tappet 30 in the closing direction of the valve.
- the device 38 comprises a valve spring 40 which concentrically surrounds the tappet 30 and is supported at one end against a recess 42 in the valve plate 24 and at the other end against an abutment 44 provided on the tappet 30.
- the abutment 44 is formed by a collar sleeve element 46, the sleeve section 48 concentrically surrounds the tappet 30 and the collar section 50 supports the spring 40.
- the tappet 30 is inserted through the opening 34 from the side of the valve plate 24 facing the cylinder space until the valve plate 32 lies sealingly against the valve seat 36.
- the spring 40 is then pushed onto the plunger 30 from the opposite side.
- the collar bushing element 48 is pushed onto the plunger 30 within the spring 40 to the extent that until, as a result of the restoring force of the spring 40, a desired resistance defining the opening pressure of the check valve is reached.
- the collar bushing element 48 is fastened to the tappet 30, for example by a flanging operation, the bushing section 48 of the collar bushing element 46 being deformed into a radial circumferential groove 52 of the tappet 30.
- an opening 54 running in the plane of the plate for supplying fuel is provided in FIG.
- the opening 54 opens into the tappet through opening 34 of the valve plate 24.
- the tappet 30 or the valve plate 32 is lifted against the prestressing of the spring 40 from the sealing seat 36, so that fuel is fed past the valve plate 32, which is via the supply opening 54 can be sucked into the cylinder space 18.
- the suction-side check valve 26 closes and the piston 12 can extend with its piston surface almost to the valve plate 32 of the suction-side check valve 26.
- the high-pressure fuel then passes through a recess 56 to the high-pressure check valve 28 and from there to a high-pressure outlet 58 of the radial piston pump.
- FIG. 4 shows a further embodiment of a check valve 60 on the suction side, which differs from the embodiment described above essentially in that the abutment 62 is formed by a slotted locking washer 64, which rests on the tappet 66 in FIG Area of an annular groove 68 extending in the circumferential direction can be clipped on. Since the annular groove 68 and the axial stop on the tappet 66 are predetermined, the desired opening pressure of the check valve is set by selecting a locking washer 64 of a certain thickness d.
- the fuel is not supplied via an opening in the plane of the valve plate 72 but (according to FIGS. 1 and 2) from the side of the valve plate 62 facing away from the cylinder space 74, as indicated by the arrows 76.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50800199A JP4131572B2 (ja) | 1997-07-11 | 1998-07-09 | 燃料高圧供給用のラジアルピストンポンプ |
GB9904900A GB2332484B (en) | 1997-07-11 | 1998-07-09 | Inlet valve for a radial piston pump for high-pressure fuel supply |
US09/254,656 US6406272B2 (en) | 1997-07-11 | 1998-07-09 | Radial piston pump for high-pressure fuel delivery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19729790A DE19729790C2 (de) | 1997-07-11 | 1997-07-11 | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
DE19729790.0 | 1997-07-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999002861A1 true WO1999002861A1 (de) | 1999-01-21 |
Family
ID=7835425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001918 WO1999002861A1 (de) | 1997-07-11 | 1998-07-09 | Einlassventil für eine radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6406272B2 (de) |
JP (1) | JP4131572B2 (de) |
DE (1) | DE19729790C2 (de) |
GB (1) | GB2332484B (de) |
WO (1) | WO1999002861A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013037543A1 (de) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Pumpe, insbesondere kraftstoffhochdruckpumpe |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19860672A1 (de) * | 1998-12-29 | 2000-07-13 | Bosch Gmbh Robert | Kolbenpumpe zur Kraftstoffhochdruckerzeugung |
IT1310755B1 (it) * | 1999-11-30 | 2002-02-22 | Elasis Sistema Ricerca Fiat | Pompa idraulica ad alta pressione, in particolare pompa a pistoniradiali per il carburante di un motore a combustione interna. |
US6805538B2 (en) * | 2000-08-14 | 2004-10-19 | Stanadyne Corporation | Fuel tank mounted, motorized high pressure gasoline pump |
DE10102397A1 (de) * | 2001-01-19 | 2002-07-25 | Zf Batavia Llc | Radialkolbenpumpe |
JP4609687B2 (ja) * | 2001-04-26 | 2011-01-12 | 株式会社デンソー | 逆止弁およびそれを備えた燃料噴射ポンプ |
US6986363B1 (en) | 2002-04-03 | 2006-01-17 | Hydro-Gear Limited Partnership | Valve assembly for use in a hydraulic component |
US6761182B1 (en) * | 2002-04-03 | 2004-07-13 | Hydro-Gear Limited Partnership | Method for configuration of a valve |
US7066199B1 (en) | 2002-04-03 | 2006-06-27 | Hydro-Gear Limited Partnership | Valve assembly |
US6964280B1 (en) | 2002-04-03 | 2005-11-15 | Hydro-Gear Limited Partnership | Valve assembly for use in a hydraulic component |
US7320334B1 (en) | 2002-04-03 | 2008-01-22 | Hydro-Gear Limited Partnership | Valve Assembly |
KR100539209B1 (ko) * | 2002-08-29 | 2005-12-27 | 주식회사 두원정공 | 고압 서플라이 펌프 |
JP2004183552A (ja) * | 2002-12-03 | 2004-07-02 | Denso Corp | 燃料高圧供給用ポンプ |
GB0311814D0 (en) * | 2003-05-22 | 2003-06-25 | Delphi Tech Inc | Pump assembly |
DE102004013244A1 (de) * | 2004-03-18 | 2005-10-06 | Robert Bosch Gmbh | Hochdruckpumpe, insbesondere für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
JP4650629B2 (ja) * | 2004-11-16 | 2011-03-16 | 株式会社アドヴィックス | ラジアルプランジャポンプ |
US7296594B1 (en) | 2005-03-22 | 2007-11-20 | Hydro-Gear Limited Partnership | Combination check valve and neutral valve assembly for use in a hydraulic component |
US7178787B2 (en) * | 2005-05-05 | 2007-02-20 | Trw Automotive U.S. Llc | Valve assembly |
JP2008248788A (ja) * | 2007-03-30 | 2008-10-16 | Denso Corp | 高圧燃料ポンプ |
DE102008064914B3 (de) * | 2007-03-29 | 2022-02-17 | Denso Corporation | Hydraulische Pumpe |
GB0812888D0 (en) * | 2008-07-15 | 2008-08-20 | Delphi Tech Inc | Improvements relating to fuel pumps |
DE102011003107A1 (de) * | 2011-01-25 | 2012-07-26 | Continental Automotive Gmbh | Hochdruckpumpe |
DE102011089857A1 (de) | 2011-12-23 | 2013-06-27 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung |
CN104005924B (zh) * | 2013-02-25 | 2016-04-20 | 白巨章 | 大功率径向柱塞泵 |
CN103696921B (zh) * | 2013-12-13 | 2015-10-21 | 西安交通大学 | 一种采用液压力回程的阀配流式径向柱塞液压泵 |
CN103742378B (zh) * | 2013-12-19 | 2016-01-20 | 西安交通大学 | 一种采用滑阀配流的径向柱塞液压泵 |
GB2579404A (en) * | 2018-11-30 | 2020-06-24 | Delphi Tech Ip Ltd | Head member for a HP pump of a fuel injection system |
KR102666988B1 (ko) * | 2022-04-05 | 2024-05-20 | (주)태성정밀 | 선박용 레이디얼 피스톤 펌프 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2255851A (en) * | 1940-10-21 | 1941-09-16 | Radial Pump And Compressor Com | Pump assembly |
CH402613A (de) * | 1961-02-27 | 1965-11-15 | Hatz Motoren | Kolbenpumpe mit sternförmig angeordneten Pumpeneinheiten |
DE1528407A1 (de) * | 1964-11-23 | 1969-09-25 | Dowty Technical Dev Ltd | Hydraulische Verdraengungseinrichtung |
DE9115631U1 (de) * | 1991-12-17 | 1992-02-13 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Saugventil für eine Radialkolbenpumpe |
DE4401074A1 (de) * | 1994-01-15 | 1995-07-20 | Elasis Sistema Ricerca Fiat | Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US507901A (en) * | 1893-10-31 | James e | ||
US319446A (en) * | 1885-06-09 | Gas-compressing pump | ||
US317963A (en) * | 1885-05-19 | ballantine | ||
US302978A (en) * | 1884-08-05 | Air-compressor | ||
US4758135A (en) * | 1986-12-30 | 1988-07-19 | Weatherford U.S., Inc. | Pump head |
US4813452A (en) * | 1987-09-28 | 1989-03-21 | Smith Roger R | Kinetic check valve |
DE8916183U1 (de) * | 1989-08-31 | 1994-09-22 | J. Wagner Gmbh, 88048 Friedrichshafen | Membranpumpe |
DE4213798C2 (de) * | 1992-04-27 | 2002-10-24 | Bosch Gmbh Robert | Radialkolbenpumpe, insbesondere Kraftstoffpumpe für Verbrennungsmotoren |
DE4216068A1 (de) * | 1992-05-15 | 1993-11-18 | Bosch Gmbh Robert | Gleichdruckventil |
US5382140A (en) * | 1993-02-11 | 1995-01-17 | Elasis Sistema Ricerca Fiat Nel Mezzogiorno | Radial-piston pump |
-
1997
- 1997-07-11 DE DE19729790A patent/DE19729790C2/de not_active Expired - Fee Related
-
1998
- 1998-07-09 GB GB9904900A patent/GB2332484B/en not_active Expired - Fee Related
- 1998-07-09 JP JP50800199A patent/JP4131572B2/ja not_active Expired - Fee Related
- 1998-07-09 WO PCT/DE1998/001918 patent/WO1999002861A1/de active Application Filing
- 1998-07-09 US US09/254,656 patent/US6406272B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2255851A (en) * | 1940-10-21 | 1941-09-16 | Radial Pump And Compressor Com | Pump assembly |
CH402613A (de) * | 1961-02-27 | 1965-11-15 | Hatz Motoren | Kolbenpumpe mit sternförmig angeordneten Pumpeneinheiten |
DE1528407A1 (de) * | 1964-11-23 | 1969-09-25 | Dowty Technical Dev Ltd | Hydraulische Verdraengungseinrichtung |
DE9115631U1 (de) * | 1991-12-17 | 1992-02-13 | FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt | Saugventil für eine Radialkolbenpumpe |
DE4401074A1 (de) * | 1994-01-15 | 1995-07-20 | Elasis Sistema Ricerca Fiat | Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013037543A1 (de) * | 2011-09-15 | 2013-03-21 | Robert Bosch Gmbh | Pumpe, insbesondere kraftstoffhochdruckpumpe |
Also Published As
Publication number | Publication date |
---|---|
JP4131572B2 (ja) | 2008-08-13 |
GB9904900D0 (en) | 1999-04-28 |
US20020009373A1 (en) | 2002-01-24 |
GB2332484B (en) | 2001-11-28 |
US6406272B2 (en) | 2002-06-18 |
JP2001500593A (ja) | 2001-01-16 |
GB2332484A (en) | 1999-06-23 |
DE19729790C2 (de) | 2002-08-29 |
DE19729790A1 (de) | 1999-01-14 |
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