WO2007024418A1 - Injecteur de carburant a element de controle rainure - Google Patents

Injecteur de carburant a element de controle rainure Download PDF

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Publication number
WO2007024418A1
WO2007024418A1 PCT/US2006/029730 US2006029730W WO2007024418A1 WO 2007024418 A1 WO2007024418 A1 WO 2007024418A1 US 2006029730 W US2006029730 W US 2006029730W WO 2007024418 A1 WO2007024418 A1 WO 2007024418A1
Authority
WO
WIPO (PCT)
Prior art keywords
check member
fluid
nozzle body
region
injector
Prior art date
Application number
PCT/US2006/029730
Other languages
English (en)
Inventor
Alan R. Stockner
Thomas D. Gens
Suryanarayan Banduvula
Kit D. Minnich
Original Assignee
Caterpillar Inc.
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
Priority claimed from US11/211,416 external-priority patent/US7360722B2/en
Priority claimed from US11/211,977 external-priority patent/US7578450B2/en
Application filed by Caterpillar Inc. filed Critical Caterpillar Inc.
Priority to CN2006800306504A priority Critical patent/CN101248267B/zh
Priority to DE112006002264T priority patent/DE112006002264T5/de
Priority to JP2008527929A priority patent/JP5044556B2/ja
Publication of WO2007024418A1 publication Critical patent/WO2007024418A1/fr

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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size

Definitions

  • This disclosure relates generally to a method and apparatus for controlling fluid flow and, more particularly, to a method and apparatus for controlling the injection of fluid.
  • an injection nozzle will have one or more orifices formed in an end thereof, and a selectively movable check member will be arranged inside the nozzle to selectively permit or prevent pressurized fuel from exiting the nozzle through the injection orifices.
  • the geometric configuration of a nozzle- check assembly may significantly impact various injection device characteristics, such as (i) injection device longevity, (ii) injection device cost, (iii) fuel injection repeatability, and (iv) engine exhaust emission levels, for example.
  • U.S. Patent Application Publication No. US 2003/0057299 Al discloses a fuel injection nozzle having a nozzle body with at least one injection port therein, and having a nozzle needle that is displaceable within the nozzle body.
  • the nozzle needle has a radial shoulder and, downstream of the shoulder, a circumferential groove that extends to the injection port.
  • the radial shoulder is embodied with very sharp edges, presumably to reduce the effect of production variations.
  • the recited object of the invention disclosed in the '299 publication is to provide reliable fuel metering.
  • Prior fuel injection devices may be improved by providing novel configurations and methods that effectively balance injection device longevity and cost, injection repeatability, and engine exhaust emissions effects.
  • the present invention is directed to overcome or improve one or more disadvantages associated with prior devices and methods for controlling the injection of fluid.
  • a fluid injector having a nozzle body with first and second body portions and at least one fluid injection orifice within the second body portion.
  • the nozzle body may be configured for transmitting fluid from the first body portion toward the orifice.
  • the fluid injector may also include a check member movably arranged inside the nozzle body for affecting fluid flow through the orifice and having a contoured outer surface defining (i) a recessed region and (ii) a generally convex region forming at least a portion of the recessed region.
  • a method of supplying fluid to a machine through a fluid injector may include transmitting fluid from a first portion of a nozzle body toward at least one fluid injection orifice defined in a second portion of the nozzle body.
  • the method may further include moving a check member arranged within the nozzle body to transmit the fluid past (i) a recessed region about the outer surface of the check member and (ii) a generally convex outer surface of the check member forming at least a portion of the recessed region.
  • Fig. 1 is a sectional side elevational view of part of a fuel injector as described herein;
  • Fig. 2 is a view to an enlarged scale of part of the check member shown in Fig. 1 ;
  • Fig. 3 is a sectional side elevational view of the fuel injector shown in Fig. 1, wherein the check member is in a flow passing position.
  • a fluid injector such as a fuel injector 10 may include a nozzle body 14 and a check member 18 movably arranged inside the nozzle body 14.
  • the nozzle body 14 may include a first body portion 22 and a second body portion or nozzle tip 26.
  • the first body portion 22 may have a cylindrical internal configuration for housing the check member 18 and may be integrally formed with the nozzle tip 26.
  • the nozzle tip 26 may have a generally conical internal configuration and may have one or more fluid injection orifices 30 formed therein. It should be appreciated that the nozzle body 14 may be configured for transmitting pressurized fluid (such as fuel from a fuel pump) through the first body portion 22 toward the orifices 30.
  • the nozzle tip 26 has a generally curved internal wall 34 at an end portion 36 of the nozzle body 14.
  • the generally curved internal wall 34 shown in Fig. 1 has the form of a generally circular or arcuate wall surrounding an end portion of the check member 18.
  • the check member 18 may be movably arranged within the nozzle body 14.
  • the check member 18 may be biased via a spring (not shown) toward the internal wall 34 of the nozzle body 14 and held in a first position (as shown in Fig. 1) wherein the check member 18 contacts one or more check seat locations 38a on the tip 26 adjacent the orifices 30 at one or more valve seat locations 38c on the check member surface.
  • the check member 18 may be configured to extend downstream past the orifices 30 in a valve covered orifice type configuration to at least partially cover the orifices 30.
  • the check member 18 may be selectively movable away from the check seats 38a to permit the transmission of fuel through the orifices 30.
  • the check member 18 may have a contoured outer surface 42 defining one or more generally convex regions Rl, R2, R3, R4, R5 and one or more generally concave regions RA, RB.
  • the contoured outer surface 42 of the check member 18 may define a recessed region 46 having a predetermined fluid volume.
  • the recessed region 46 may have an upstream beginning at or proximate the valve seat location 38c and may have a downstream beginning at or proximate a region 39c disposed on the check member 18 at a location downstream of the orifices 30 (e.g., proximate region 39a of the nozzle body 14) when the check member 18 is in a flow blocking position.
  • the recessed region 46 may extend from a position upstream of the injection orifices 30 to a position downstream of the injection orifices 30.
  • the recessed region 46 may define a circumferential groove 48 about the check member 18.
  • the recessed region 46 includes a bottom portion 50, which is the deepest part of the recessed region 46 (for example, the part of the recessed region 46 of Fig. 1 farthest from the plane of the conical internal wall of the tip 26).
  • the recessed region 46 (such as in the form of the groove 48) may be configured with a volume equal to or less than about 0.2mm 3 .
  • the recessed region 46 may be configured with a volume within a range of about 0.2mm 3 to about 0.07mm 3 , such as a volume of about 0.15 mm or a volume of about 0.075mm .
  • the outer surface 42 of the check member 18 may define a generally convex region, the center of which is generally indicated at Rl of Fig. 1.
  • the generally convex region Rl may be adjacent and interconnected with the recessed region 46 and may form a portion of the recessed region 46.
  • the generally convex region Rl is arranged upstream (i.e., toward the source of pressurized fuel that feeds the tip 26 ⁇ in Fig. 1 , the first body portion 22 is upstream from the tip 26) of the bottom portion 50 of the recessed region 46.
  • the outer surface 42 of the check member 18 may further define another generally convex region R2 disposed upstream of the generally convex region Rl and having a different curvature than the generally convex region Rl .
  • the generally convex region R2 may have a lesser degree of curvature than the generally convex region Rl .
  • the generally convex region R2 is arranged between a generally cylindrical outer surface 54 of the check member 18 and the generally convex region Rl .
  • the generally convex region R2 forms an upstream beginning of the recessed region 46 and extends into the recessed region 46.
  • the outer surface 42 of the check member 18 may define yet another generally convex region R3 disposed upstream of the generally convex region R2, between the generally cylindrical outer surface 54 of the check member 18 and the generally convex region R2.
  • the generally convex region R3 has a different curvature than the generally convex region R2.
  • the generally convex region R3 may have a greater degree of curvature than the generally convex region R2.
  • the outer surface 42 of the check member 18 may define another generally convex region R4 disposed downstream of the bottom portion 50 of the recessed region 46, between the bottom portion 50 of the recessed region 46 and an end portion 58 of the check member 18.
  • the generally convex region R4 may be interconnected with and adjacent the recessed region 46.
  • the generally convex region R4 forms a downstream beginning of the recessed region 46 and extends into the recessed region 46.
  • the outer surface 42 of the check member 18 may define yet another generally convex region R5 disposed downstream of the generally convex region R4, between the generally convex region R4 and the end portion 58 of the check member 18.
  • the generally convex region R5 has a different curvature than the generally convex region R4.
  • the generally convex region R5 may have a lesser degree of curvature than the generally convex region R4.
  • the outer surface 42 of the check member 18 may also define a generally concave region RA disposed downstream of the generally convex region Rl 5 for example between the generally convex regions Rl and R4.
  • the generally concave region RA may be adjacent and interconnected with the generally convex region Rl and may define a portion of the recessed region 46. In the embodiment of Fig. 2, the generally concave region RA forms the bottom portion 50 of the recessed region 46.
  • the outer surface 42 of the check member 18 may define another generally concave region RB disposed downstream of the generally concave region RA, between the generally concave region RA and the end portion 58 of the check member 18. More specifically, the generally concave region RB may be disposed downstream of the generally convex region R5 between the generally convex region R5 and the end portion 58 of the check member 18.
  • the check member 18 may also include a generally curved region 62 at the end portion 58 of the check member 18. Moreover, the generally curved region 62 may have a contour that substantially matches the contour of the generally curved internal wall 34 of the tip 26.
  • the embodiment of Fig. 1 includes a generally convex curved region 62 having substantially the same or about the same curvature as the generally curved internal wall 34 of the tip 26.
  • the substantially matching contours of the generally curved region 62 of the check member 18 and the generally curved internal wall 34 of the tip 26 facilitate a reduced volume chamber 66 (described hereinbelow) formed therebetween helping maintain or reduce certain engine combustion emissions characteristics.
  • This disclosure provides an apparatus and method for controlling the injection of fuel into an engine.
  • the apparatus described herein is predicted to facilitate repeatable, reliable injection performance with enhanced longevity while balancing engine emissions and cost effects.
  • the components and arrangements described herein may be applied by one skilled in the art to various injector designs, including but not limited to an electronically controlled unit injector, a hydraulically-actuated electronically controlled unit injector, a mechanically-actuated injector, or an injector coupled with a pump and line fuel system, for example.
  • the check member 18 may be moved to a flow blocking position (Fig. 1) and a flow passing position (Hg. 3).
  • a flow blocking position (Fig. 1), the upstream valve seat locations 38c of the check member 18 may be seated on the check seat locations 38a of the tip 26 so that fluid is prevented from flowing from within the nozzle body 14 into the injection orifices 30 from upstream of the orifices 30.
  • the valve covered orifice configuration of the embodiment shown in Fig. 1 may at least inhibit fluid flow through the orifices 30 from downstream of the orifices 30.
  • the recessed region 46, which forms groove 48 is disposed proximate the injection orifices 30 and is arranged in fluid communication with the injection orifices 30.
  • the bottom portion 50 of the recessed region 46 is disposed proximate the injection orifices 30 and is generally centered on a longitudinal axis Ao of at least one of the orifices 30. As in the embodiment of Fig. 1, the bottom portion 50 of the recessed region 46 may be generally centered on the longitudinal axes Ao, A 1 of all of the orifices 30. It should be appreciated that when the check member 18 of Fig. 1 is arranged in the flow blocking position, the recessed region 46 may be at least partially arranged between the check seat location 38a, which is upstream of the orifices 30, and the region 39a of the nozzle body 14, which is downstream of the orifices 30.
  • a chamber volume 66 or sac volume, exists between the end portion 58 of the check member 18 and the end portion 36 of the nozzle body 14.
  • the generally curved region 62 of the check member 18 may be arranged within the chamber volume 66 such that the chamber volume 66 is bounded, at least in part, by the generally curved region 62 of the check member 18 and the generally curved wall 34 of the nozzle body 14.
  • the chamber volume 66 may be configured with a volume equal to or less than about 0.7mm 3 when the check member 18 is in a flow blocking position.
  • the chamber volume 66 may be configured with a volume within a range of about 0.7mm 3 to about 0.3mm 3 , such as a volume of about 0.67mm 3 or a volume of about 0.35mm 3 .
  • valve seat locations 38c are lifted off of the check seat locations 38a to allow fluid to be transmitted from the first body portion 22 toward the tip 26, past the generally cylindrical outer surface 54 of the check member, past the generally convex regions R3, R2, and Rl and the check seat locations 38a and into the fluid injection orifices 30 for transmission into a machine, such as into the combustion chamber of an engine for example. It should be appreciated that some of the fluid may be transmitted past the orifices 30 and the generally convex regions R4 and R5 to enter the chamber volume 66 region.
  • the generally convex regions Rl, R2 may be disposed adjacent the injection orifices 30. Moreover, at least a portion of the generally convex regions Rl, R2 may be arranged at least slightly upstream of the injection orifices 30 so that the fluid communicates with the generally convex regions Rl, R2 prior to entering the orifices 30. Moreover, the bottom portion 50 of the recessed region 46 may also be arranged at least partially upstream of the injection orifices 30 so that the fluid communicates with the bottom portion 50 prior to entering the orifices 30.
  • the fluid may approach and flow through a gradually widening channel defined by the wall of the nozzle body 14 and the recessed region 46 of the check member 18 so that the velocity of the fluid is reduced prior to the fluid entering the orifices 30. More specifically, the velocity of the fluid may be reduced as it flows past and fluidly communicates with the generally convex regions Rl, R2 of the check member 18 and the recessed region 46 of the check member 18 prior to entering the orifices 30.
  • pressurized fluid transmitted through the injector is estimated to experience a decrease in fluid separation phenomena proximate or within the orifices 30, thereby decreasing fluid cavitation effects within the tip 26 to ultimately decrease potential damage to the injector and increase the life of the injector.
  • increased injection spray uniformity for example via improved check lift characteristics, is also estimated to result.
  • the geometrical and structural elements are further estimated to facilitate one or more desirable characteristics for fuel injectors, such as providing smooth velocity transition regions and/or uniform pressure distributions within the fuel injector when the injector is in a flow passing state, beneficial management of stresses and pressures generated within the check member 18 during operation of the check member (e.g., resulting from repeated engagement with the nozzle body 14), and improved manufacturability.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant d'injecter un fluide dans une machine. L'invention concerne un injecteur de fluide doté d'un corps de buse avec une première et une seconde parties corps et au moins un orifice d'injection de fluide dans la seconde partie de corps. Le corps de buse peut être destiné à transmettre un fluide de la première partie corps en direction de l'orifice. L'injecteur de fluide peut également comporter un élément de contrôle disposé mobile à l'intérieur du corps de buse, influençant ainsi l'écoulement fluidique traversant l'orifice, et ayant une surface externe profilée définissant (i) une zone évidée et (ii) une zone généralement convexe formant au moins une partie de la zone évidée.
PCT/US2006/029730 2005-08-25 2006-07-28 Injecteur de carburant a element de controle rainure WO2007024418A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2006800306504A CN101248267B (zh) 2005-08-25 2006-07-28 具有带槽控制元件的燃料喷射器
DE112006002264T DE112006002264T5 (de) 2005-08-25 2006-07-28 Brennstoffeinspritzvorrichtung mit Rückschlagglied mit Nut
JP2008527929A JP5044556B2 (ja) 2005-08-25 2006-07-28 溝付逆止部材を備えた燃料噴射器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/211,977 2005-08-25
US11/211,416 US7360722B2 (en) 2005-08-25 2005-08-25 Fuel injector with grooved check member
US11/211,977 US7578450B2 (en) 2005-08-25 2005-08-25 Fuel injector with grooved check member
US11/211,416 2005-08-25

Publications (1)

Publication Number Publication Date
WO2007024418A1 true WO2007024418A1 (fr) 2007-03-01

Family

ID=37076000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/029730 WO2007024418A1 (fr) 2005-08-25 2006-07-28 Injecteur de carburant a element de controle rainure

Country Status (3)

Country Link
JP (1) JP5044556B2 (fr)
DE (1) DE112006002264T5 (fr)
WO (1) WO2007024418A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2461014A1 (fr) * 2010-12-06 2012-06-06 OMT Officine Meccaniche Torino S.p.A. Buse d'injection à longue durée de vie pour un injecteur haute pression de carburant lourd
WO2012085901A2 (fr) 2011-05-09 2012-06-28 Lietuvietis Vilis I Canal d'égalisation de pression à trous recouverts par aiguille
FR3052192A1 (fr) * 2016-06-03 2017-12-08 Continental Automotive France Dispositif pour injecter un fluide sous pression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994004A (zh) * 2014-05-16 2014-08-20 江苏大学 可移动压力室式喷油嘴

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1560614A (en) * 1977-03-09 1980-02-06 Bosch Gmbh Robert Fuel injection nozzle
GB2186632A (en) * 1986-02-18 1987-08-19 Bosch Gmbh Robert Fuel injection nozzle for i.c. engines
GB2308408A (en) * 1995-12-19 1997-06-25 Bosch Gmbh Robert Fuel injection valve for internal-combustion engines
DE10306808A1 (de) * 2003-02-18 2004-09-02 Siemens Ag Injektor zum Einspritzen von Kraftstoff
EP1555430A1 (fr) * 2004-01-13 2005-07-20 Delphi Technologies, Inc. Buse d'injection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19942370A1 (de) * 1999-09-04 2001-03-22 Bosch Gmbh Robert Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
EP1563181B1 (fr) * 2002-11-11 2006-10-04 Robert Bosch Gmbh Soupape d'injection de carburant pour moteurs combustion interne
DE10322826A1 (de) * 2003-05-19 2004-12-09 Robert Bosch Gmbh Kraftstoffeinspritzventil für Brennkraftmaschinen
DE602004008630T2 (de) * 2004-10-01 2008-06-12 Delphi Technologies, Inc., Troy Einspritzdüse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1560614A (en) * 1977-03-09 1980-02-06 Bosch Gmbh Robert Fuel injection nozzle
GB2186632A (en) * 1986-02-18 1987-08-19 Bosch Gmbh Robert Fuel injection nozzle for i.c. engines
GB2308408A (en) * 1995-12-19 1997-06-25 Bosch Gmbh Robert Fuel injection valve for internal-combustion engines
DE10306808A1 (de) * 2003-02-18 2004-09-02 Siemens Ag Injektor zum Einspritzen von Kraftstoff
EP1555430A1 (fr) * 2004-01-13 2005-07-20 Delphi Technologies, Inc. Buse d'injection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2461014A1 (fr) * 2010-12-06 2012-06-06 OMT Officine Meccaniche Torino S.p.A. Buse d'injection à longue durée de vie pour un injecteur haute pression de carburant lourd
ITTO20100969A1 (it) * 2010-12-06 2012-06-07 O M T Ohg Torino S P A Polverizzatore ad elevata vita operativa per iniettori meccanici ad alta pressione operanti con combustibile pesante
WO2012085901A2 (fr) 2011-05-09 2012-06-28 Lietuvietis Vilis I Canal d'égalisation de pression à trous recouverts par aiguille
FR3052192A1 (fr) * 2016-06-03 2017-12-08 Continental Automotive France Dispositif pour injecter un fluide sous pression

Also Published As

Publication number Publication date
JP5044556B2 (ja) 2012-10-10
DE112006002264T5 (de) 2008-06-26
JP2009506254A (ja) 2009-02-12

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