EP1927748A2 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1927748A2
EP1927748A2 EP07118347A EP07118347A EP1927748A2 EP 1927748 A2 EP1927748 A2 EP 1927748A2 EP 07118347 A EP07118347 A EP 07118347A EP 07118347 A EP07118347 A EP 07118347A EP 1927748 A2 EP1927748 A2 EP 1927748A2
Authority
EP
European Patent Office
Prior art keywords
valve
control
chamber
fuel injector
control sleeve
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.)
Withdrawn
Application number
EP07118347A
Other languages
German (de)
English (en)
Other versions
EP1927748A3 (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 EP1927748A2 publication Critical patent/EP1927748A2/fr
Publication of EP1927748A3 publication Critical patent/EP1927748A3/fr
Withdrawn legal-status Critical Current

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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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided

Definitions

  • the invention relates to a fuel injector according to the preamble of patent claim 1.
  • the in Fig. 1 shown fuel injector 1 is commonly used in an internal combustion engine having a plurality of cylinders, wherein each of these cylinders associated with such an injector (fuel injection valve).
  • the injector has a known manner in a cylinder combustion chamber of the internal combustion engine projecting, not shown here injector and the injector depending on the pressure in a control chamber 2 opening and closing, here indicated only to a small extent nozzle needle 3.
  • the control chamber 2 can optionally be connected via an inlet throttle (Z throttle) 4 permanently to a high-pressure inlet line (high pressure side) 5 of the fuel.
  • a control valve 6 in the form of a 2/2-way valve is provided, which opens or blocks the connection of the control chamber 2 with a low-pressure chamber (low-pressure side) 7.
  • the high-pressure feed line 5 is connected to a high-pressure accumulator (common rail), not shown, and the low-pressure chamber 7 with a leak oil drain.
  • the nozzle needle 3 is guided to form the control chamber 2 in a valve piece 8 , in which the Z-throttle 4 is provided.
  • the control valve 6 has a guide piece 9 with a through-hole 9a and a control sleeve 10 displaceably guided therein between two valve positions.
  • the valve and guide pieces 8, 9 are clamped in a bore of an injector body 11 by means of a valve clamping screw 12 .
  • In the valve and guide pieces 8, 9 extending from the control chamber 2 connecting channel 13 which opens via an annular pressure chamber 14 in the through hole 9a of the guide piece 9 and an outlet throttle (A-throttle) 15 has.
  • A-throttle outlet throttle
  • an upper conical valve seat 16 connects at the top of the pressure chamber 14.
  • the control sleeve 10 has at its upper end a conical sealing surface which cooperates with the upper valve seat 16.
  • the lower sleeve end of the control sleeve 10 is guided on the free upper end of a valve pin 17 of the valve member 8 and has a conical sealing surface, which cooperates with a lower flat valve seat 18 on the valve pin 17 and the valve piece 8.
  • a high-pressure side inner valve chamber (annular groove) 19 of the valve pin 17 connects at the top, which is connected via a transverse and longitudinal channel 20 of the valve pin 17 to the high-pressure inlet line 5.
  • the lower valve seat 18 is surrounded by a low-pressure side annular outer valve chamber 21 which is connected via a channel 22 in the guide piece 9 with the connecting channel 13.
  • the control sleeve 10 is supported by a valve pin 17 supported on the inner closing spring 23 in their in Fig.
  • the control valve 6 is a double seat valve.
  • the closing spring 23 is disposed within the control sleeve 10 in a spring chamber 26 which is connected via a connecting channel 27 to the low-pressure chamber 7.
  • the piezoelectric actuator 24 may be hydraulically translated or have a temperature compensation via its housing.
  • valve position In her in Fig.1 shown upper (closed) valve position, the control sleeve 10 is located at the top of the conical valve seat 16 sealingly and is at the bottom of the flat valve seat 18 lifted.
  • this upper valve position on the one hand the connection of the control chamber 2 to the low pressure chamber 7 is closed by the closed pressure chamber 14 and on the other hand, the valve chamber 21 - and thus the control chamber 2 - connected via the channel 20 with the high pressure supply line 5, so that the nozzle needle. 3 is closed by the pressure prevailing in the control chamber 2 high pressure.
  • the piezoelectric actuator 24 If the piezoelectric actuator 24 is energized, it presses the control sleeve 10 down into its lower valve position, in which the control sleeve 10 is lifted off the top of the conical valve seat 16 and sealingly abuts the flat valve seat 18 below.
  • the control chamber 2 In this lower (open) valve position on the one hand, the control chamber 2 is connected to the low pressure chamber 7 through the now open pressure chamber 14 and on the other hand, the connection of the valve chamber 21 - and thus the control chamber 2 - locked to the high-pressure inlet line 5, so that the pressure reduced in the control room 2 and the nozzle needle 3 opens. If the energization is canceled, the control sleeve 10 is pushed back over the closing spring 23 in the upper valve position. When the lower valve seat 18 is open, the control chamber 2 is filled via the inlet and connecting lines 13, 20, 22 and the optional Z-throttle 4 and the nozzle needle 3 is closed by the high pressure prevailing in the control chamber 2 again.
  • the upper valve seat 16 are formed as a flat seat on a valve plate 30 and the connecting channel 13 as a longitudinal bore in the valve pin 17 and that the pressure chamber 14 is provided within the control sleeve 10.
  • the connecting channel 13 is connected via the flat lower valve seat 18 and via the longitudinal channel 20 with the interposition of a throttle 31 (for tolerance narrowing) and to the high-pressure inlet line 5. More specifically, the longitudinal channel 20 opens into the outer valve space (annular groove) 19, which is separated by the lower valve seat 18 from the inner valve space (annular space) 21, which is connected to the connecting channel 13.
  • the piezoelectric actuator 24 is biased by a tubular spring 32 and acts on the control sleeve 10 via bolts 33 which pass through the valve plate 30.
  • the closing spring 23 is arranged in the low-pressure space 7 surrounding the control sleeve 10.
  • the actuator housing 34 is made of a material that has the same or a very similar coefficient of thermal expansion as the piezoelectric actuator 24.
  • the piezoelectric actuator 24 is decoupled via a diaphragm 35 from the low-pressure chamber 7, ie from the fuel. Furthermore, there is shown a drain 7a departing from the low-pressure space 7.
  • Fig. 2 is different in the Fig. 3 shown fuel injector 1 in that here the control sleeve 10 is not formed on a valve pin and the connecting channel 13 both in the valve piece 8 and in the control sleeve (longitudinal and transverse channel 40 ) and the upper valve seat 16 as in Fig. 1 at the Guide piece 9 is provided.
  • the closing spring 23 is arranged in the inner valve chamber 21.
  • control chamber 2 In the lower (open) valve position on the one hand, the control chamber 2 is connected to the low pressure chamber 7 through the now open pressure chamber 14 and on the other hand, the compound of Valve chamber 21 - and thus also of the control chamber 2 - locked to the high pressure supply line 5, so that the pressure in the control chamber 2 is reduced and the nozzle needle 3 opens. If no Z-throttle 4 is used, the control sleeve 10 can allow extremely fast speeds of the nozzle needle 2.
  • the double seat valve 6 with almost balanced force control sleeve 10 thus allows an extremely fast opening and closing of the nozzle needle.
  • Fig. 4 shows the force F acting on the control sleeve 10 when opening and closing as a function of the stroke h of the control sleeve 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
EP07118347A 2006-12-01 2007-10-12 Injecteur de carburant Withdrawn EP1927748A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610056840 DE102006056840A1 (de) 2006-12-01 2006-12-01 Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP1927748A2 true EP1927748A2 (fr) 2008-06-04
EP1927748A3 EP1927748A3 (fr) 2009-07-15

Family

ID=39110570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07118347A Withdrawn EP1927748A3 (fr) 2006-12-01 2007-10-12 Injecteur de carburant

Country Status (2)

Country Link
EP (1) EP1927748A3 (fr)
DE (1) DE102006056840A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939441A2 (fr) * 2006-12-21 2008-07-02 Robert Bosch Gmbh Injecteur de carburant
EP2022975A1 (fr) * 2007-07-24 2009-02-11 Robert Bosch GmbH Injecteur
EP2366887A1 (fr) * 2010-03-08 2011-09-21 Robert Bosch GmbH Injecteur de carburant
EP2818684A1 (fr) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne
KR20180067689A (ko) * 2015-10-27 2018-06-20 델피 테크놀로지스 아이피 리미티드 연료 분사기의 제어 밸브 장치

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008005523A1 (de) * 2008-01-23 2009-07-30 Robert Bosch Gmbh Kraftstoffinjektor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004051071A1 (fr) * 2002-12-05 2004-06-17 Robert Bosch Gmbh Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection
DE102004041172B3 (de) * 2004-08-25 2006-01-05 Siemens Ag Einspritzventil
EP1621764A1 (fr) * 2004-06-30 2006-02-01 C.R.F. Società Consortile per Azioni Injecteur d'un moteur à combustion interne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004051071A1 (fr) * 2002-12-05 2004-06-17 Robert Bosch Gmbh Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection
EP1621764A1 (fr) * 2004-06-30 2006-02-01 C.R.F. Società Consortile per Azioni Injecteur d'un moteur à combustion interne
DE102004041172B3 (de) * 2004-08-25 2006-01-05 Siemens Ag Einspritzventil

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939441A2 (fr) * 2006-12-21 2008-07-02 Robert Bosch Gmbh Injecteur de carburant
EP1939441A3 (fr) * 2006-12-21 2009-02-04 Robert Bosch Gmbh Injecteur de carburant
EP2022975A1 (fr) * 2007-07-24 2009-02-11 Robert Bosch GmbH Injecteur
EP2366887A1 (fr) * 2010-03-08 2011-09-21 Robert Bosch GmbH Injecteur de carburant
EP2818684A1 (fr) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs à combustion interne
KR20180067689A (ko) * 2015-10-27 2018-06-20 델피 테크놀로지스 아이피 리미티드 연료 분사기의 제어 밸브 장치
CN108291519A (zh) * 2015-10-27 2018-07-17 德尔福知识产权有限公司 燃料喷射器的控制阀装置
US10801456B2 (en) 2015-10-27 2020-10-13 Delphi Technologies Ip Limited Control valve arrangement of a fuel injector

Also Published As

Publication number Publication date
EP1927748A3 (fr) 2009-07-15
DE102006056840A1 (de) 2008-06-05

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