EP0817914B1 - Druckventil - Google Patents
Druckventil Download PDFInfo
- Publication number
- EP0817914B1 EP0817914B1 EP96945711A EP96945711A EP0817914B1 EP 0817914 B1 EP0817914 B1 EP 0817914B1 EP 96945711 A EP96945711 A EP 96945711A EP 96945711 A EP96945711 A EP 96945711A EP 0817914 B1 EP0817914 B1 EP 0817914B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- valve member
- face
- control
- 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.)
- Expired - Lifetime
Links
Images
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
- 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
- F02M59/46—Valves
- F02M59/462—Delivery 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
- 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
- F02M59/46—Valves
Definitions
- the invention relates to a pressure valve of the type of claim 1.
- a pressure valve of the type of claim 1. Such from DE 40 37 465 A1
- Known pressure valves are in the delivery lines between a high pressure source having a high pressure space and an injection point, preferably between one Injection pump and an injector one Internal combustion engine used.
- the pressure valve should ensure that only after reaching a certain The medium to be pumped, e.g. Fuel, reaches the injection point, or at the end of the Injection the pressure supply to the injection point The pressure drops below the necessary injection pressure is interrupted.
- the known pressure valve has one in a pressure or. Pipe socket axially displaceable valve member that of a valve spring with its valve sealing surface in contact is held on a stationary valve seat.
- the Opening movement of the valve member takes place through the in the high pressure room, there in the pump work room Injection pump, built-up high pressure fuel that the Valve member against the restoring force of the valve spring from Valve seat lifts off, so that a flow cross section on Pressure valve is opened, through which the fuel to Injector arrives.
- a backflow throttle bore in the Valve member provided by at least one Longitudinal bore is formed.
- the known pressure valve has the disadvantage that the timing of the maximum Flow cross section at the pressure valve due to the changing hydraulic conditions not precise and can be set reproducibly, so that the Injection timing at the injection point is not precise enough lets determine what the quality of the mixture preparation and Combustion in the combustion chamber of a supply Internal combustion engine can significantly affect.
- the pressure valve according to the invention with the characteristic Features of claim 1, in contrast, the Advantage that the opening movement of the valve member of the Pressure valves and in particular the time of opening of the maximum flow cross section at the pressure valve the hydraulic conditions, e.g. a hydraulic Adhesion of the valve member is not affected, whereby hydraulic gluing can now be used consciously.
- a hydraulic Adhesion of the valve member is not affected, whereby hydraulic gluing can now be used consciously.
- This allows a constant, reproducible Opening pressure or injection pressure at the pressure valve precise to adjust. This is advantageously done by a 2-stage Opening stroke of the valve member of the pressure valve reached that a jump function in the opening stroke of the Allows valve member.
- the control of the 2-stage opening stroke movement of the The valve member is carried out in a simple manner
- Control recesses in the valve member which are advantageous Formed by control bores, the axial Ends of the outlet openings on the lateral surface of the Form valve member control edges with corresponding fixed tax recesses interact.
- This Fixed control recesses are more advantageous Way in a control sleeve inserted into the pressure port arranged, which is easy to manufacture and assemble.
- the cross-section additionally flown in the opening direction on the valve member is in a simple manner by a Ring collar formed, one with the control recesses of the Control sleeve connectable pressure space limited.
- FIG. 1 shows a longitudinal section through the pressure valve according to the invention in its closed Position.
- FIG. 1 shows a longitudinal section through an as Backflow throttle valve designed pressure valve, which in a delivery line, not shown, between a High-pressure chamber and an injection line is used, the flow direction from when the pressure valve is open High pressure space to the injection point with arrow 1 is marked.
- the pressure valve has a tubular pressure nozzle 3, whose through hole turns into a cylindrical Recess 5 extended to its larger, the High-pressure chamber facing end by a cylindrical Connection piece with a through hole 9 is limited.
- a control sleeve 11 is used, the Inner diameter over a ring shoulder 13 in two areas is divided into different sizes.
- a piston-shaped valve member 15 is axially displaceable led that at its top, the injection point facing end has an annular collar 17.
- valve spring 23 On an upper annular end face 21 formed on the annular collar 17 attacks a valve spring 23, which on the other hand supports a bore paragraph 25 in the pressure port 3 and the the valve member 15 with its lower annular end face 19 in System against the stationary ring shoulder 13 of the control sleeve keeps pressed.
- Control sleeve 11 has a valve seat 27 with which one through Circumferential surface of the annular collar 17 formed valve sealing surface 29 on the valve member 15 for controlling a Flow cross-section cooperates at the pressure valve.
- a backflow throttle duct in the Valve member 15 provided as the valve member 15 axially penetrating throttle bore 31 is formed.
- the throttle bore 31 in the valve member 15 is one, a Control recess in the valve member 15 forming control bore 33 cut, in the embodiment as a cross hole is trained.
- the control bore 33 its in the axial direction edges directed to the valve member 15 on the two Exit openings each form control edges, acts here to control the stroke movement of the valve member 15 with Control recesses in the control sleeve 11 together.
- This Control recesses in the control sleeve 11 will initially by a first annular groove 35 in the smaller in diameter Inner wall area of the control sleeve 11 formed in Embodiment through two longitudinal bores 37 is cut starting from the bottom Ring end face 39 of the control sleeve 11 in the ring shoulder 13 open in the area of the pressure chamber 22 and at the lower end are closed by a ball 41.
- the ring grooves 35 and 43 preferably arranged in the control sleeve 11 that during the opening stroke movement of the valve member 15 at the same time from the control bore 33 and the edge 45 of the Valve member 15 are run over.
- the pressure valve according to the invention works in the following Wise.
- valve spring 23 holds the valve member 15 with the collar 17 in contact with the ring shoulder 13 of the Control sleeve 11, the valve member 15 in this position with its valve sealing surface 29 abuts the valve seat 27 and closes the flow cross-section.
- a pressure equalization between the line parts of the delivery line takes place in this state only to a limited extent over the Throttle bore 31 in valve member 15.
- the Connector 7 With the start of high-pressure funding, the Connector 7 a high pressure on the pressure valve, which Valve member 15 on its lower end face 47 in Opening direction against the restoring force of the valve spring 23 acted upon. Part of this comes under high Pressurized medium (preferably fuel) over the Throttle bore 31 in the connector 7th part of the cylindrical recess 5 and acts on the entire upper face of the Valve member 15 including the upper ring face 21, so that the first phase of the opening stroke movement of the Valve member 15 is very delayed.
- high Pressurized medium preferably fuel
- Valve member 15 After covering a certain pre-stroke distance s des Valve member 15 pass the control bore 33 and the edge 45 of the valve member 15 in registration with the annular grooves 35 and 43, so that now the high pressure suddenly over the Continues longitudinal bores 37 in the pressure chamber 22 and there additionally the lower ring end face 19 on the valve member 15 acted upon in the opening direction.
- the Control bore 33 and the edge 45 as in the embodiment shown simultaneously or alternatively one after the other be controlled.
- the pressure valve is then closed in known manner by the termination of the high pressure supply to Pressure valve, as a result of which the valve member 15 of the Valve spring 23 again in contact with the stationary ring shoulder 13 is moved back so that the valve sealing surface 29 again in overlap with the valve seat surface 27 arrives. Pressure equalization at the pressure valve only takes place still via the throttle bore 31.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Safety Valves (AREA)
Description
Claims (10)
- Druckventil zum Einbau in eine Förderleitung zwischen einem Hochdruckraum und einer Einspritzstelle, mit einem eine zylindrische Ausnehmung (5) aufweisenden Druckstutzen (3), in der ein Druckventilglied (15) axial verschiebbar angeordnet ist, das eine Ventildichtfläche (29) aufweist, mit der es zur Steuerung eines Durchflußquerschnittes mit einem ortsfesten Ventilsitz (27) zusammenwirkt und von dem es durch den in Strömungsrichtung (1) anstehenden Förderdruck entgegen der Kraft einer Ventilfeder (23) abhebbar ist, wobei im Ventilglied (15)ein Rückströmdrosselkanal vorgesehen ist, über den bei Schließlage des Druckventils ein Druckausgleich erfolgt, dadurch gekennzeichnet, daß am Ventilglied (15) Steuerausnehmungen vorgesehen sind, die nach Durchlaufen eines bestimmten Vorhubweges des Ventilgliedes (15) in Öffnungsrichtung einen im Querschnitt vergrößerten Anströmquerschnitt am Ventilglied (15) in Öffnungsrichtung freigeben.
- Druckventil nach Anspruch 1, dadurch gekennzeichnet, daß das kolbenförmige Ventilglied (15) einen Ringbund (17) aufweist, dessen Umfangsfläche die Ventildichtfläche (29) bildet, wobei das Ventilglied (15) in einer in die zylindrische Ausnehmung (5) des Druckstutzens (3) eingesetzten Steuerhülse (11) geführt ist, die mit einem Teil ihrer axialen Innenwand den Ventilsitz (27) bildet.
- Druckventil nach Anspruch 2, dadurch gekennzeichnet, daß das Ventilglied (15) wenigstens eine Steuerbohrung (33) aufweist, die den Rückströmdrosselkanal (31) schneidend an der Mantelfläche des Ventilgliedes (15) austritt und nach Durchlaufen einer bestimmten Ventilgliedhubbewegung in Überdeckung mit einem Steuerkanal in der Steuerhülse (11) gelangt, der in einen vom Ringbund (17) begrenzten Druckraum (22) mündet.
- Druckventil nach Anspruch 3, dadurch gekennzeichnet, daß die Steuerhülse (11) einen gestuften Innendurchmesser ausweist, wobei ein Ringabsatz (13) am Querschnittsübergang eine Anlagefläche für die entgegen der Durchströmrichtung (1) bei geöffnetem Druckventil weisende untere Ringstirnfläche (19) des Ringbundes (17) am Ventilglied (15) bildet.
- Druckventil nach Anspruch 4, dadurch gekennzeichnet, daß der Steuerkanal in der Steuerhülse (11) durch wenigstens eine Längsbohrung (37) gebildet ist, die ausgehend von der unteren, der Durchströmrichtung (1) bei geöffnetem Druckventil entgegenweisenden Ringstirnfläche (39) der Steuerhülse (11) in den Druckraum (22) am Ringabsatz(13) mündet und die von wenigstens einer Ringnut (35) am Innendurchmesser der Steuerhülse (11) angeschnitten wird, die ihrerseits von der Steuerbohrung (33) im Ventilglied (15) überfahrbar ist.
- Druckventil nach Anspruch 5, dadurch gekennzeichnet, daß die Längsbohrung (37) an ihrem unteren, der Stirnfläche (39) zugewandten Ende verschlossen ist.
- Druckventil nach Anspruch 6, dadurch gekennzeichnet, daß die Längsbohrung (37) mittels einer eingesetzten Kugel (41) verschlossen ist.
- Druckventil nach Anspruch 5 , dadurch gekennzeichnet, daß am der unteren Stirnfläche (39) nahen Ende eine weitere Ringnut (43) am Innendurchmesser der Steuerhülse (11) vorgesehen ist, die die Längsbohrung (37) anschneidend mit einer unteren Kante (45) am Ventilglied (15) zusammenwirkt, wobei beim Eintauchen der unteren Kante (45) in die weitere Ringnut (43) ein zusätzlicher Überströmquerschnitt zum Druckraum (22) aufgesteuert wird.
- Druckventil nach Anspruch 2, dadurch gekennzeichnet, daß die in Durchströmrichtung (1) bei geöffnetem Druckventil weisende obere Ringstirnfläche (21) des Ringbundes (17) am Ventilglied (15) von der Ventilfeder (23) beaufschlagt ist, die sich andererseits an einem ortsfesten Anschlag (25) im Druckstutzen (3) abstützt.
- Druckventil nach Anspruch 2, dadurch gekennzeichnet, daß am Übergang zwischen der unteren Stirnfläche (47) des Ventilgliedes (15) zum Ventilgliedschaft und am Übergang zwischen der unteren Ringstirnfläche (19) zum Ringbund (17) eine Anschrägung vorgesehen ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19602906 | 1996-01-27 | ||
DE19602906A DE19602906A1 (de) | 1996-01-27 | 1996-01-27 | Druckventil |
PCT/DE1996/002116 WO1997027396A1 (de) | 1996-01-27 | 1996-11-07 | Druckventil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0817914A1 EP0817914A1 (de) | 1998-01-14 |
EP0817914B1 true EP0817914B1 (de) | 2002-02-20 |
Family
ID=7783834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96945711A Expired - Lifetime EP0817914B1 (de) | 1996-01-27 | 1996-11-07 | Druckventil |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0817914B1 (de) |
JP (1) | JP2000500838A (de) |
KR (1) | KR100300508B1 (de) |
CN (1) | CN1075165C (de) |
BR (1) | BR9607806A (de) |
DE (2) | DE19602906A1 (de) |
WO (1) | WO1997027396A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI114501B (fi) * | 2001-06-27 | 2004-10-29 | Waertsilae Finland Oy | Polttoainejärjestelmän virtausrajoitinventtiili |
FI117805B (fi) | 2003-06-17 | 2007-02-28 | Waertsilae Finland Oy | Järjestely polttoaineen syöttölaitteistossa |
US8291781B2 (en) | 2007-12-21 | 2012-10-23 | Schlumberger Technology Corporation | System and methods for actuating reversibly expandable structures |
US8733453B2 (en) | 2007-12-21 | 2014-05-27 | Schlumberger Technology Corporation | Expandable structure for deployment in a well |
CN102536463A (zh) * | 2010-12-22 | 2012-07-04 | 中国航空工业集团公司沈阳发动机设计研究所 | 一种断流活门 |
CN103437930B (zh) * | 2013-08-13 | 2018-05-29 | 南京威孚金宁有限公司 | 等压阀性能的控制方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1060181A (en) * | 1965-01-11 | 1967-03-01 | Cav Ltd | Liquid fuel supply systems for internal combustion engines |
FR1543884A (fr) * | 1966-11-11 | 1968-10-25 | Cav Ltd | Dispositif d'alimentation en combustible pour moteur à combustion interne |
JPS61294166A (ja) * | 1985-06-21 | 1986-12-24 | Yanmar Diesel Engine Co Ltd | 内燃機関用燃料噴射ポンプ |
DE4037465A1 (de) * | 1990-10-31 | 1992-05-07 | Daimler Benz Ag | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
JPH07305668A (ja) * | 1994-05-11 | 1995-11-21 | Nippondenso Co Ltd | デリバリバルブ |
-
1996
- 1996-01-27 DE DE19602906A patent/DE19602906A1/de not_active Withdrawn
- 1996-11-07 EP EP96945711A patent/EP0817914B1/de not_active Expired - Lifetime
- 1996-11-07 BR BR9607806A patent/BR9607806A/pt not_active IP Right Cessation
- 1996-11-07 WO PCT/DE1996/002116 patent/WO1997027396A1/de active IP Right Grant
- 1996-11-07 CN CN96192762A patent/CN1075165C/zh not_active Expired - Fee Related
- 1996-11-07 KR KR1019970706127A patent/KR100300508B1/ko not_active IP Right Cessation
- 1996-11-07 JP JP9526398A patent/JP2000500838A/ja not_active Abandoned
- 1996-11-07 DE DE59608762T patent/DE59608762D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN1179197A (zh) | 1998-04-15 |
EP0817914A1 (de) | 1998-01-14 |
CN1075165C (zh) | 2001-11-21 |
DE59608762D1 (de) | 2002-03-28 |
BR9607806A (pt) | 1998-07-07 |
JP2000500838A (ja) | 2000-01-25 |
DE19602906A1 (de) | 1997-07-31 |
WO1997027396A1 (de) | 1997-07-31 |
KR100300508B1 (ko) | 2002-06-26 |
KR19980702720A (ko) | 1998-08-05 |
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