EP1252429A2 - Soupape pour commander le passage de liquides - Google Patents

Soupape pour commander le passage de liquides

Info

Publication number
EP1252429A2
EP1252429A2 EP01909462A EP01909462A EP1252429A2 EP 1252429 A2 EP1252429 A2 EP 1252429A2 EP 01909462 A EP01909462 A EP 01909462A EP 01909462 A EP01909462 A EP 01909462A EP 1252429 A2 EP1252429 A2 EP 1252429A2
Authority
EP
European Patent Office
Prior art keywords
valve
piston
pressure chamber
seat
slide
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
Application number
EP01909462A
Other languages
German (de)
English (en)
Other versions
EP1252429B1 (fr
Inventor
Friedrich Boecking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1252429A2 publication Critical patent/EP1252429A2/fr
Application granted granted Critical
Publication of EP1252429B1 publication Critical patent/EP1252429B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/06—Pumps peculiar thereto
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating means
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
    • F02M2200/502—Springs biasing the valve member to the open position

Definitions

  • the invention relates to a valve for controlling liquids according to the preamble of claim 1.
  • a valve is known in which an actuating piston of a valve member is slidably arranged in a part of the stepped bore with a small 'diameter in a stepped bore of the valve housing , A larger piston movable by a piezo actuator is arranged in part of the stepped bore with a larger diameter.
  • a hydraulic pressure chamber filled with a pressure medium is formed between the two pistons, so that a hydraulic translation of a movement of the piezo actuator takes place. That is, when the big piston through the
  • Piezo actuator is moved by a certain distance, the actuating piston of the valve member makes a stroke increased by the transmission ratio of the piston diameter, since the piston of the piezo actuator has a larger area than the actuating piston of the valve member.
  • 3/2 control valves are also used, as is disclosed, for example, in US Pat. No. 5,738,075.
  • Such 3/2 control valves can be designed as seat slide or seat-seat valves.
  • the pressure from a rail is determined by means of a controllable piston via a pressure chamber and a booster piston to a control chamber from which the fuel is injected into the combustion chamber.
  • the pressure chamber is connected to a drain line in the non-actuated state, so that in
  • Pressure chamber leakage oil pressure prevails.
  • a connection between the high pressure area and the leakage oil area occurs for a short time, regardless of the type of valve (seat slide valve or seat-seat valve). This results in a so-called exhaust surge in the drain line. This hinders the relief of the control chamber of the valve until the valve has sealed the opening to the high pressure area.
  • valve according to the invention for controlling liquids' with the characterizing features of patent claim 1 has the advantage that such a surge pulse to the leakage oil line does not occur. This is prevented by connecting a slide element upstream of the seat of the control valve.
  • the slide element is arranged in the opening direction immediately in front of the area of the piston with which the piston sits on the valve seat. Depending on the stroke of the slide element, this enables a delayed opening of the passage between the inlet line and the pressure chamber, but an immediate closing of the passage between the inlet line and the pressure chamber. It can thus be ensured at any time when the control valve is switched over that there is no connection between the supply line and the leakage oil line.
  • the stroke of the piston for opening the connection between the inlet line and the pressure chamber is at least the same due to the provision of the slide element, but advantageously longer than a stroke for closing or opening a passage between the pressure chamber Control valve and the drain line. This can advantageously prevent the exhaust surge in the leak oil line. Furthermore, when the control valve is switched over, the relief of the control chamber is no longer impeded, since the slide element immediately seals off the high-pressure region.
  • the slide element of the piston is cylindrical.
  • the piston of the control valve is advantageously configured in two parts. This allows a seat slide valve with a pressure space arranged between them to be realized.
  • the control valve is particularly advantageously constructed as a force-balancing valve.
  • the guide diameter at the valve seat corresponds to the diameter of the slide element.
  • the piston of the control valve is also advantageously formed in one piece. This allows a 3/2-seat slide valve to be used as an exhaust valve.
  • the valve for controlling liquids is preferably designed as a 3/2-seat slide valve or as a 3/2-seat seat valve.
  • the valve according to the invention can thus be used to achieve a clear function of a control valve from the high-pressure inlet area into the leakage oil line without an exhaust surge.
  • the overlap on the leakage oil slide element can be optimized.
  • an optimal slide ratio can be formed from the respective stroke lengths.
  • the overlap should be selected so that there are no significant delays in the valve, but it is ensured that there is no discharge surge in the leak oil line.
  • Fig. 1 is a schematic sectional view of a fuel injection valve according to a first
  • Fig. 2 is a schematic partial sectional view of a fuel injection valve according to a second
  • valve according to the invention is used in a pressure-translated common rail injector.
  • the valve according to the invention is designed as a 3/2-seat slide control valve 1.
  • the fuel injection valve comprises the 3/2 control valve 1.
  • the control valve 1 consists of an actuating element 2 and a first piston 3 and a second piston 4.
  • an actuating element 2 for example, a Known magnetic actuator or a known piezo actuator can be used.
  • the first piston 3 consists of several piston sections 3a to 3e.
  • a first piston section 3a is cylindrical and is connected to the actuating element 2. This is followed by a second piston section 3b, which is concave and with a corresponding position of the piston 3 opens a first passage 10 on the valve seat. Subsequent to the second
  • Piston section 3b is followed by the third piston section designed as slide element 3c.
  • the third piston section 3 c is arranged directly on the valve seat or on the first passage 10.
  • the piston 2 further comprises an expanding fourth piston section 3d and a further cylindrical fifth piston section 3e.
  • the fifth piston section 3e is connected to a pressure chamber 6 arranged between the first piston 3 and the second piston 4.
  • the second piston 4 consists of a slide element 4a and a base body 4b.
  • the piston 4 is held in the open position by a spring 9, so that a second passage 5 between the pressure chamber 6 and a leakage oil line 8 is open.
  • the leakage oil pressure prevails in the pressure chamber 6 in the non-actuated state.
  • a guide diameter d on the first piston 3 is equal to one
  • control valve 1 is constructed as a force-balancing valve.
  • the pressure chamber 6 is also connected to a booster piston 11 via a line 19.
  • the multi-stage translator piston 11 is via a Return spring 12 is held in its initial position and communicates with a control chamber 15 with its smaller piston diameter.
  • the control chamber 15 is filled with fuel via a filling valve 13 and a fuel line 14. The fuel is emitted into an unshown combustion chamber via an injection nozzle 16 which is biased by a spring 17.
  • an overlap on the piston 4 can be optimized depending on the application by the slide ratio h 2 / h x .
  • the coverage (h 2 - h) will be extended (ie greater than 0) to ensure that no leakage oil surge occurs.
  • FIG. 2 shows a second exemplary embodiment of a valve according to the invention for controlling liquids.
  • This control valve 1 can also be used in a fuel injection valve. Since that
  • Fuel injection valve of the second embodiment in comparison with the first embodiment has only changes to the control valve 1, the other parts of the fuel injection valve in FIG. 2 and in the following description have been omitted, since these are accurate are formed as in the first embodiment. Furthermore, the same reference numerals are used in the second exemplary embodiment for similar parts as in the first exemplary embodiment.
  • the control valve 1 of the second exemplary embodiment has only one piston 3.
  • the piston comprises a plurality of piston sections 3a to 3e.
  • the piston 3 also has a first cylindrical piston section 3a and a second piston section 3b, which is concave.
  • the second piston section 3b is adjoined by a slide element 3c, which is arranged directly on the valve seat.
  • the piston 3 further comprises a fourth, tapering piston section 3d and a fifth, cylindrical piston section 3e, which is connected to an actuating element 2.
  • the piston 3 is partly arranged in a pressure chamber 6 and opens / closes the connection between an inlet line 7 from a rail and a booster piston connected to the pressure chamber 6 via a line 19 (not shown).
  • the control valve 1 also includes a leak oil line 8.
  • the operation of the control valve 1 according to the second embodiment is as follows.
  • the piston 3 is moved in the direction of the actuating element 2.
  • the fourth, tapering piston section 3d lifts off the piston seat at the first passage 10.
  • the slide element 3c is arranged directly after the second piston section 3b, the connection 10 between the high-pressure supply line 7 and the pressure chamber 6 is only opened when the edge of the slide element 3c facing the second piston section 3b has been guided past the valve seat 10. Since, as shown in Fig. 2, the stroke length h 2 of the slide element 3c is greater than the stroke length h provided at the second passage 5 between the first piston section 3a and the second piston section 3b, it is ensured that the connection between the pressure chamber 6 and the
  • Leakage oil line 8 is closed before the connection via the first passage 10 between the inlet line 7 and the pressure chamber 6 is opened.
  • the control valve 1 When the control valve 1 is closed, the connection between the inlet line 7 and the pressure chamber 6 is first closed before the passage 5 between the pressure chamber 6 and the leakage oil line 8 is opened.
  • the desired coverage (h x -h 2 ) can be set by the ratio of the 'stroke length h 2 of the slide element 3c to the stroke length ⁇ at the second passage 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

L'invention concerne une soupape pour commander le passage de liquides, comportant une conduite d'alimentation (7) et une conduite de trop-plein (8) qui communiquent chacune avec une chambre de pression (6). Cette soupape comporte également un élément piston (3, 4) qui peut être déplacé au moyen d'un actionneur (2) et qui ouvre un premier passage (10) entre la conduite d'alimentation (7) et la chambre de pression (6). Cet élément piston (3, 4) présente un élément coulissant (3c) placé directement sur le siège du piston (10). La longueur de course (h2) de l'élément coulissant (3c) pour ouvrir le premier passage est supérieure ou égale à la longueur de course (h1) pour fermer un deuxième passage (5) entre la chambre de pression (6) et la conduite de trop-plein (8).
EP01909462A 2000-01-22 2001-01-13 Soupape pour commander le passage de liquides Expired - Lifetime EP1252429B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10002702A DE10002702A1 (de) 2000-01-22 2000-01-22 Ventil zum Steuern von Flüssigkeiten
DE10002702 2000-01-22
PCT/DE2001/000122 WO2001053685A2 (fr) 2000-01-22 2001-01-13 Soupape pour commander le passage de liquides

Publications (2)

Publication Number Publication Date
EP1252429A2 true EP1252429A2 (fr) 2002-10-30
EP1252429B1 EP1252429B1 (fr) 2006-01-04

Family

ID=7628404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909462A Expired - Lifetime EP1252429B1 (fr) 2000-01-22 2001-01-13 Soupape pour commander le passage de liquides

Country Status (9)

Country Link
US (1) US6736331B2 (fr)
EP (1) EP1252429B1 (fr)
JP (1) JP2003520324A (fr)
AT (1) ATE315174T1 (fr)
CZ (1) CZ20022414A3 (fr)
DE (2) DE10002702A1 (fr)
ES (1) ES2255545T3 (fr)
HU (1) HUP0301062A2 (fr)
WO (1) WO2001053685A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002702A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10141110A1 (de) 2001-08-22 2003-03-20 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
JP4019934B2 (ja) * 2002-12-26 2007-12-12 株式会社デンソー 制御弁および燃料噴射弁
DE10328245A1 (de) * 2003-06-24 2005-01-13 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
CN108506130B (zh) * 2018-04-18 2024-06-11 莆田市博泰动力设备有限公司 减少高压共轨燃油动态泄漏的喷油器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3477344A (en) * 1967-05-24 1969-11-11 United Aircraft Corp Fluid mechanical hysteretic device
DE3741526A1 (de) * 1987-12-08 1989-06-22 Bosch Gmbh Robert Sitzventil
US5241935A (en) * 1988-02-03 1993-09-07 Servojet Electronic Systems, Ltd. Accumulator fuel injection system
DE59001374D1 (de) * 1990-09-26 1993-06-09 Knoblauch Georg Fa Kassette in form einer flachverpackung zur aufbewahrung von laenglichen gegenstaenden.
DE4311627B4 (de) * 1993-04-08 2005-08-25 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
US5687693A (en) * 1994-07-29 1997-11-18 Caterpillar Inc. Hydraulically-actuated fuel injector with direct control needle valve
US5680988A (en) * 1995-01-20 1997-10-28 Caterpillar Inc. Axial force indentation or protrusion for a reciprocating piston/barrel assembly
DE19701879A1 (de) * 1997-01-21 1998-07-23 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE19716221B4 (de) * 1997-04-18 2007-06-21 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung mit Vor- und Haupteinspritzung bei Brennkraftmaschinen, insbesondere für schwer zündbare Kraftstoffe
DE19937713C1 (de) 1999-08-10 2001-03-15 Siemens Ag Steuerventilanordnung zum Einsatz in einem Kraftstoffinjektor für Verbrennungsmotoren
DE10002702A1 (de) * 2000-01-22 2001-08-02 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10031278A1 (de) * 2000-06-27 2002-01-17 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0153685A2 *

Also Published As

Publication number Publication date
US6736331B2 (en) 2004-05-18
DE50108611D1 (de) 2006-03-30
CZ20022414A3 (en) 2004-03-17
EP1252429B1 (fr) 2006-01-04
HUP0301062A2 (en) 2003-08-28
US20030089794A1 (en) 2003-05-15
ES2255545T3 (es) 2006-07-01
WO2001053685A2 (fr) 2001-07-26
DE10002702A1 (de) 2001-08-02
ATE315174T1 (de) 2006-02-15
WO2001053685A3 (fr) 2001-12-06
JP2003520324A (ja) 2003-07-02

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