EP2450558A1 - Einspritzventil - Google Patents

Einspritzventil Download PDF

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Publication number
EP2450558A1
EP2450558A1 EP10189756A EP10189756A EP2450558A1 EP 2450558 A1 EP2450558 A1 EP 2450558A1 EP 10189756 A EP10189756 A EP 10189756A EP 10189756 A EP10189756 A EP 10189756A EP 2450558 A1 EP2450558 A1 EP 2450558A1
Authority
EP
European Patent Office
Prior art keywords
injection valve
fuel
ball
inlet portion
support means
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Withdrawn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
EP10189756A
Other languages
English (en)
French (fr)
Inventor
Valerio Polidori
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP10189756A priority Critical patent/EP2450558A1/de
Publication of EP2450558A1 publication Critical patent/EP2450558A1/de
Withdrawn legal-status Critical Current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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • 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
    • 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
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
    • 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
    • F02M63/0054—Check 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips

Definitions

  • the invention relates to an injection valve comprising a hollow fuel inlet portion.
  • Fuel inlet portions of an injection valve are used for receiving fuel from a fuel support means like a fuel rail and/or a manifold and for feeding received fuel to an injection nozzle at a front end of the injection valve.
  • a fuel inlet portion may also comprise an inlet fitting and/or an inlet filter for filtering the fuel.
  • fuel is under high pressure, for example at 200 bar or higher in case of gasoline engines and at 2000 bar or even higher in case of diesel engines.
  • Fig. 1 shows a traditional injection valve V mounted into the cylinder head H of an internal combustion engine. It also shows the spray S of backflow of fuel as described herein before, and the region, where a hollow fluid inlet portion 1 is arranged within the injection valve, intended to be connected to a manifold and/or a common rail.
  • Fig. 2 shows a section of an injection valve according to a first embodiment of the present invention. Moreover, it shows a hollow fluid inlet portion 1 (including an inlet fitting 1 ⁇ in this example) comprising a check valve 2.
  • the check valve 2 comprises a support means 3 and a ball 4. This check valve 2 will prevent said toxic and hot backflow, whenever the injection valve will, at its hollow fluid inlet portion 1, be disconnected from a manifold and/or from a common rail.
  • the support means 3 and/or the ball 4 are made of materials being resistant against corrosion.
  • Such material may be metallic material like stainless steel or it may be plastic material of a given hardness.
  • Fig. 3 shows the check valve 2 of Fig. 2 in more detail.
  • the support means 3 of this check valve 2 is made in the form of a tripod having, for example, three legs 3a and an end part 3b, where the legs 3a join each other. It is advantageous, if the end part 3b comprises a recess where the ball 4 may rest during regular operation of the injector valve, i. e., when no back flow of fuel is to be expected.
  • Fig. 4 and 5 show an enlarged view of the section of the hollow inlet portion 1 with the check valve 2 in operation: Fig. 4 shows a situation, where the injection valve is in regular operation and Fig. 5 shows a situation, where above described back flow is likely to occur, but is prevented by the check valve.
  • Fig. 4 shows a first part 1a of the hollow inlet portion 1 and a second part 1b of the hollow inlet portion 1.
  • the first part 1a has a first inner diameter d1 and the second part 1b has a second inner diameter d2. Both inner diameters d1, d2 are different from each other and the second inner diameter d2 is larger than the first inner diameter d1.
  • the first inner diameter d1 is smaller than a diameter d4 (see Fig. 3 ) of the ball 4
  • the second inner diameter d2 is larger than the diameter d4 of the ball 4. Accordingly, the ball 4 may move up and down within the second part 1b, but not within the first part 1a.
  • the injection valve is mounted to a cylinder head of an internal combustion engine and, at an outer end of the hollow fluid inlet portion 1, to a manifold (may be, a manifold of a fuel supply system like a common rail system) and where the engine is running, fuel flows from the manifold (not shown) into the injection valve, namely into and through the hollow fluid inlet portion 1, there passing the first part 1a thereof and then the second part 1b thereof (the direction of the fuel is shown by arrows).
  • a manifold may be, a manifold of a fuel supply system like a common rail system
  • the ball 4 Due to the force of the flowing fuel the ball 4 is pressed towards the tripod and rests in a resting position on the tripod, especially on the recess, with which the upper end of the tripod is provided, whereas the fuel flows along the surface of the ball 4 in direction to the tripod. There the fuel passes the tripod between its legs, and from there the fluid flows, just as usual, towards a nozzle at the front end of the injection valve.
  • Fig. 6 shows a section of an injection valve according to a second embodiment of the present invention. Moreover, it shows a hollow fluid inlet portion 1 (including an inlet fitting 1' in this example) comprising a check valve 2.
  • the check valve 2 comprises a support means 3 and a ball 4. Also this check valve 2 will prevent said toxic and hot backflow, whenever the injection valve will, at its hollow fluid inlet portion 1, be disconnected from a manifold and/or from a common rail.
  • Fig. 7 shows the check valve (2) of Fig. 6 in more detail.
  • the support means (3) of this check valve (2) is made in the form of a bushing.
  • An upper end part 3b of the bushing is designed so that the ball 4 may rest on it during regular operation of the injector valve, i. e., when no back flow of fuel is to be expected.
  • Fig. 8 and 9 show an enlarged view of the section of the hollow inlet portion 1 of the injection valve according to the second embodiment of the invention, with the check valve 2 in operation:
  • Fig. 8 shows a situation, where the injection valve is in regular operation and
  • Fig. 9 shows a situation, where above described back flow is likely to occur, but is prevented by the check valve.
  • Fig. 8 shows a first part 1a of the hollow inlet portion 1 and a second part 1b of the hollow inlet portion 1.
  • the first part 1a has a first inner diameter d1 and the second part 1b has a second inner diameter d2, which may vary within the second part 1b. But in any case both inner diameters d1, d2 are different from each other, and in any case the second inner diameter d2 is larger than the first inner diameter d1.
  • the first inner diameter d1 is smaller than a diameter d4 (see Fig. 7 ) of the ball 4, and at least a maximum value of the second inner diameter d2 is larger than the diameter d4 of the ball 4. Accordingly, the ball 4 may move up and down within the second part 1b, but not within the first part 1a.
  • the injection valve is mounted to a cylinder head of an internal combustion engine and, at an outer end of the hollow fluid inlet portion 1, to a manifold (may be, a manifold of a fuel supply system like a common rail system) and where the engine is running, fuel flows from the manifold (not shown) into the injection valve, namely into and through the hollow fluid inlet portion 1, there passing the first part 1a thereof and then the second part 1b thereof (the direction of the fuel is shown by arrows). Due to the force of the flowing fuel the ball 4 is pressed towards the bushing and rests in a resting position on the bushing, whereas the fuel flows along the surface of the ball 4 in direction to the bushing.
  • the sidewall of the bushing has two apertures. Accordingly, the fuel passes the bushing through these apertures, and then, from the inside of the bushing the fluid flows, just as usual, towards a nozzle at the front end of the injection valve.

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)
EP10189756A 2010-11-03 2010-11-03 Einspritzventil Withdrawn EP2450558A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10189756A EP2450558A1 (de) 2010-11-03 2010-11-03 Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10189756A EP2450558A1 (de) 2010-11-03 2010-11-03 Einspritzventil

Publications (1)

Publication Number Publication Date
EP2450558A1 true EP2450558A1 (de) 2012-05-09

Family

ID=43734230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10189756A Withdrawn EP2450558A1 (de) 2010-11-03 2010-11-03 Einspritzventil

Country Status (1)

Country Link
EP (1) EP2450558A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1796455A (en) * 1927-12-27 1931-03-17 Emsco Derrick & Equip Co Ball-valve assembly
US4945947A (en) * 1989-05-26 1990-08-07 Chromalloy American Corporation Ball-type check valve
GB2325024A (en) * 1996-07-25 1998-11-11 Cummins Engine Co Inc Fuel injection system and fuel injector for i.c. engines
JPH1150930A (ja) * 1997-07-30 1999-02-23 Toyota Motor Corp 蓄圧式燃料噴射装置
EP1715177A1 (de) * 2005-04-21 2006-10-25 Dell'orto S.P.A. Piezoelektrisch Aktuator zur Steuerung einer Kraftstoffpumpe und Pumpe-Düse-Einheit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1796455A (en) * 1927-12-27 1931-03-17 Emsco Derrick & Equip Co Ball-valve assembly
US4945947A (en) * 1989-05-26 1990-08-07 Chromalloy American Corporation Ball-type check valve
GB2325024A (en) * 1996-07-25 1998-11-11 Cummins Engine Co Inc Fuel injection system and fuel injector for i.c. engines
JPH1150930A (ja) * 1997-07-30 1999-02-23 Toyota Motor Corp 蓄圧式燃料噴射装置
EP1715177A1 (de) * 2005-04-21 2006-10-25 Dell'orto S.P.A. Piezoelektrisch Aktuator zur Steuerung einer Kraftstoffpumpe und Pumpe-Düse-Einheit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11339688B2 (en) 2020-01-29 2022-05-24 Borgwarner, Inc. Variable camshaft timing valve assembly

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