EP0137122A3 - Fuel injector for internal combustion engines - Google Patents

Fuel injector for internal combustion engines Download PDF

Info

Publication number
EP0137122A3
EP0137122A3 EP84107560A EP84107560A EP0137122A3 EP 0137122 A3 EP0137122 A3 EP 0137122A3 EP 84107560 A EP84107560 A EP 84107560A EP 84107560 A EP84107560 A EP 84107560A EP 0137122 A3 EP0137122 A3 EP 0137122A3
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engines
valve needle
piston
attached
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.)
Ceased
Application number
EP84107560A
Other languages
German (de)
French (fr)
Other versions
EP0137122A2 (en
Inventor
Dietrich Dipl.-Ing. Trachte
Helmut Giess
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 EP0137122A2 publication Critical patent/EP0137122A2/en
Publication of EP0137122A3 publication Critical patent/EP0137122A3/en
Ceased 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow

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

Kraftstoff-Einspritzdüse für Brennkraftmaschinen, mit einer nach außen öffnenden Ventilnadel (26), die mit einem Kolben (46) verbunden ist, auf den eine Dämpfungskappe (48) aufgesteckt ist, welche sich an einer gehäusefesten Schulter (18) abstützt. In der Dämpfungskappe (43) ist ein Dämpferraum (60) gebildet, der über einen Drosselkanal mit dem Strömungsweg des Kraftstoffs verbunden ist. Der Durchmesser des Kolbens (43) ist kleiner als der vom Ventilsitz (24) umschlossene Querschnitt, wodurch sich eine Ringschulter (47) ergibt, an welcher der ungedrosselte Kraftstoffdruck im Öffnungssinn auf die Ventilnadel (26) einwirkt. Diese Anordnung hat den Vorteil, daß bei niedrigen Drehzahlen und Kraftstoffmengen die Ventilnadel (26) auch bis zu größeren Nadelhüben wirkungsvoll gebremst werden kann, ohne daß die Spritzdauer bei größeren Drehzahlen zu lang wird. Fuel injection nozzle for internal combustion engines, with an outwardly opening valve needle (26) with a Piston (46) is connected to a damping cap (48) is attached, which is attached to a housing Shoulder (18) supports. There is a in the damping cap (43) Damper chamber (60) formed with a throttle channel the flow path of the fuel is connected. The The diameter of the piston (43) is smaller than that of Valve seat (24) enclosed cross section, resulting in a Ring shoulder (47) on which the unthrottled Fuel pressure in the opening direction on the valve needle (26) acts. This arrangement has the advantage that at low The valve needle (26) also revs and speeds be braked effectively up to larger needle strokes can without increasing the spraying time at higher speeds long.

EP84107560A 1983-08-13 1984-06-29 Fuel injector for internal combustion engines Ceased EP0137122A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833329380 DE3329380A1 (en) 1983-08-13 1983-08-13 FUEL INJECTION NOZZLE FOR INTERNAL COMBUSTION ENGINES
DE3329380 1983-08-13

Publications (2)

Publication Number Publication Date
EP0137122A2 EP0137122A2 (en) 1985-04-17
EP0137122A3 true EP0137122A3 (en) 1987-03-04

Family

ID=6206539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107560A Ceased EP0137122A3 (en) 1983-08-13 1984-06-29 Fuel injector for internal combustion engines

Country Status (4)

Country Link
US (1) US4605171A (en)
EP (1) EP0137122A3 (en)
JP (1) JPS6047867A (en)
DE (1) DE3329380A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (en) * 1985-09-17 1987-03-26 Bosch Gmbh Robert METERING VALVE FOR DOSING LIQUIDS OR GASES
DE3914486A1 (en) * 1989-05-02 1990-11-08 Bosch Gmbh Robert METHOD FOR PRODUCING A VALVE NEEDLE AND VALVE NEEDLE
JP3381918B2 (en) * 1991-10-11 2003-03-04 キャタピラー インコーポレイテッド Damping actuator and valve assembly for electronically controlled unit injector
US5651501A (en) * 1993-12-23 1997-07-29 Caterpillar Inc. Fluid damping of a valve assembly
DE19531652A1 (en) * 1995-08-29 1997-05-07 Bosch Gmbh Robert Fuel injection valve for internal combustion engines
FR2817054A1 (en) * 2000-11-21 2002-05-24 Snecma Moteurs Fuel injector for turbomachine combustion chamber, has second valve which controls flow rate of injected fuel to utilization unit up to second fuel pressure and functions as fixed diaphragm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084662A1 (en) * 1982-01-26 1983-08-03 Robert Bosch Gmbh Fuel injector for internal-combustion engines
EP0126947A2 (en) * 1983-05-25 1984-12-05 Robert Bosch Gmbh Fuel injection nozzle for internal-combustion engines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3107160A1 (en) * 1981-02-26 1982-09-09 Robert Bosch Gmbh, 7000 Stuttgart "FUEL INJECTION NOZZLE"
US4428248A (en) * 1981-04-20 1984-01-31 Eaton Corporation Shifting actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0084662A1 (en) * 1982-01-26 1983-08-03 Robert Bosch Gmbh Fuel injector for internal-combustion engines
EP0126947A2 (en) * 1983-05-25 1984-12-05 Robert Bosch Gmbh Fuel injection nozzle for internal-combustion engines

Also Published As

Publication number Publication date
DE3329380A1 (en) 1985-02-28
EP0137122A2 (en) 1985-04-17
US4605171A (en) 1986-08-12
JPS6047867A (en) 1985-03-15

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19840629

AK Designated contracting states

Designated state(s): DE FR GB IT

PUAL Search report despatched

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AK Designated contracting states

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Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19870717

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19880130

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GIESS, HELMUT

Inventor name: TRACHTE, DIETRICH, DIPL.-ING.