EP1387949A1 - Multi-hole nozzle - Google Patents

Multi-hole nozzle

Info

Publication number
EP1387949A1
EP1387949A1 EP01948147A EP01948147A EP1387949A1 EP 1387949 A1 EP1387949 A1 EP 1387949A1 EP 01948147 A EP01948147 A EP 01948147A EP 01948147 A EP01948147 A EP 01948147A EP 1387949 A1 EP1387949 A1 EP 1387949A1
Authority
EP
European Patent Office
Prior art keywords
holes
tip
nozzle
situated
fuel
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Withdrawn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
EP01948147A
Other languages
German (de)
French (fr)
Inventor
Edward Jakubowski
Adam Socha
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1387949A1 publication Critical patent/EP1387949A1/en
Withdrawn legal-status Critical Current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
    • F02M61/18—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
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • 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
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
    • F02B23/0621—Squish flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the object of the invention is a multi-hole nozzle used as a tip of fuel injectors supplying combustion engines.
  • hole-type nozzles of injectors There are two known kinds of hole-type nozzles of injectors, some of them are provided with a well and the others have a seat. Nevertheless, regardless of their structure, their purpose is to deliver a fuel stream to a combustion chamber of an engine through its injection at high-pressure, which in order to ensure good fuel atomisation and mixing with air can reach even 205 MPa.
  • the holes of injectors are in the form of passages, which are usually drilled using electro-erosion methods and situated in the nozzle body inside the stream cone. The number and diameter of holes depends on the injection dosage, the shape of the combustion chamber and the intensity of the air whirl in the combustion chamber. Nozzles have to be carefully selected based on the engine type used.
  • nozzles In order to ensure appropriate injection dosages nozzles must be selected correctly - depending on the injection duration and dosage per degree of crankshaft rotation, fuel atomisation - depending on the number, shape and atomisation of fuel streams, fuel distribution in the combustion chamber and its leakproofness.
  • the nozzles In injection units and Common Rail systems the nozzles are mounted directly in the injectors and the inlet edges of the injection passages are rounded in order to prevent wearing of the edges caused by abrasive particles contained in the fuel and also in order to reduce the fuel flow rate tolerance.
  • the purpose of the invention is to develop a nozzle that would ensure more effective fuel atomisation when fuel is injected into the engine combustion chamber by obtaining smaller diameters of fuel drops and appropriate solid angle of atomisation, which would enable a considerable increase in engine efficiency and exhaust gas purity.
  • the inlet holes have rounded edges and the invention is characterised by the fact that its tip is provided with at least two holes ending in thin passages with intersecting symmetry axes. Holes in the form of thin passages are situated on at least one side of the tip and they are preferably in the shape of an arc section and the holes are preferably situated in the direct neighbourhood of an appropriately shaped mechanical obstacle.
  • nozzle constructed according to the invention it can be used in all known types of injectors, especially in injectors with a well and those with a seat while such a nozzle tip ensures a considerable increase in fuel atomisation using the energy of the fuel stream while interacting streams in the antiphase increase energy used simultaneously for better fuel atomisation.
  • the use of the solution according to the invention makes it possible to have the engine supplied directly with organic fuels, especially with organic oils and alcohols.
  • fig. 1 - shows the location of the nozzle in the chamber of a combustion engine
  • fig. 2 - shows a nozzle tip with broken holes in the form of thin passages
  • fig. 3 - presents a nozzle tip with a seat with holes in the form of an arc
  • fig. 4 - presents a nozzle tip with a seat with angularly situated holes
  • fig. 5 - shows a nozzle tip with a seat having a hole situated in the direct neighbourhood of an appropriately shaped mechanical obstacle situated at the front of the nozzle
  • fig. 6 - shows a nozzle tip with a seat situated in the neighbourhood of a lateral mechanical obstacle.
  • an injector 1 is located in a combustion chamber 2 and it is ended with a nozzle 3 whose tip 4 is provided with at least two holes 5 in the form of thin passages having rounded edges at their inlet while the symmetry axes of the holes 5 intersect. It is also preferable to have the holes 5 situated on at least one side of the tip 4 and to have them formed into the shape of an arc section 6 and have them located in the direct neighbourhood of an appropriately shaped mechanical obstacle 7.

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

The object of the invention is a multi-hole nozzle used as the ending of fuel injectors supplying combustion engines. In the multi-hole according to the invention the inlet holes of the tip (4) have rounded edges and the tip is provided with at least two holes (5) in the form of thin passages (5), while the symmetry axes of the holes (5) intersect. The holes (5) are situated on at least one side of the tip (4) and they preferably are in the shape of an arc section (6).

Description

MULTI-HOLE NOZZLE
The object of the invention is a multi-hole nozzle used as a tip of fuel injectors supplying combustion engines.
There are two known kinds of hole-type nozzles of injectors, some of them are provided with a well and the others have a seat. Nevertheless, regardless of their structure, their purpose is to deliver a fuel stream to a combustion chamber of an engine through its injection at high-pressure, which in order to ensure good fuel atomisation and mixing with air can reach even 205 MPa. The holes of injectors are in the form of passages, which are usually drilled using electro-erosion methods and situated in the nozzle body inside the stream cone. The number and diameter of holes depends on the injection dosage, the shape of the combustion chamber and the intensity of the air whirl in the combustion chamber. Nozzles have to be carefully selected based on the engine type used. In order to ensure appropriate injection dosages nozzles must be selected correctly - depending on the injection duration and dosage per degree of crankshaft rotation, fuel atomisation - depending on the number, shape and atomisation of fuel streams, fuel distribution in the combustion chamber and its leakproofness. In injection units and Common Rail systems the nozzles are mounted directly in the injectors and the inlet edges of the injection passages are rounded in order to prevent wearing of the edges caused by abrasive particles contained in the fuel and also in order to reduce the fuel flow rate tolerance. The purpose of the invention is to develop a nozzle that would ensure more effective fuel atomisation when fuel is injected into the engine combustion chamber by obtaining smaller diameters of fuel drops and appropriate solid angle of atomisation, which would enable a considerable increase in engine efficiency and exhaust gas purity.
In the multi-hole nozzle according to the invention the inlet holes have rounded edges and the invention is characterised by the fact that its tip is provided with at least two holes ending in thin passages with intersecting symmetry axes. Holes in the form of thin passages are situated on at least one side of the tip and they are preferably in the shape of an arc section and the holes are preferably situated in the direct neighbourhood of an appropriately shaped mechanical obstacle.
It is an advantage of the nozzle constructed according to the invention that it can be used in all known types of injectors, especially in injectors with a well and those with a seat while such a nozzle tip ensures a considerable increase in fuel atomisation using the energy of the fuel stream while interacting streams in the antiphase increase energy used simultaneously for better fuel atomisation. The use of the solution according to the invention makes it possible to have the engine supplied directly with organic fuels, especially with organic oils and alcohols.
The object of the invention has been described in the example products presented in the drawings, where fig. 1 - shows the location of the nozzle in the chamber of a combustion engine; fig. 2 - shows a nozzle tip with broken holes in the form of thin passages; fig. 3 - presents a nozzle tip with a seat with holes in the form of an arc; fig. 4 - presents a nozzle tip with a seat with angularly situated holes; fig. 5 - shows a nozzle tip with a seat having a hole situated in the direct neighbourhood of an appropriately shaped mechanical obstacle situated at the front of the nozzle; and fig. 6 - shows a nozzle tip with a seat situated in the neighbourhood of a lateral mechanical obstacle. As shown in the drawing, an injector 1 is located in a combustion chamber 2 and it is ended with a nozzle 3 whose tip 4 is provided with at least two holes 5 in the form of thin passages having rounded edges at their inlet while the symmetry axes of the holes 5 intersect. It is also preferable to have the holes 5 situated on at least one side of the tip 4 and to have them formed into the shape of an arc section 6 and have them located in the direct neighbourhood of an appropriately shaped mechanical obstacle 7.

Claims

Patent claims
1. A multi-hole nozzle with the inlet holes having rounded edges characterised by the fact that it has a tip (4) provided with at least two holes (5) in the form of thin passages, whose symmetry axes intersect.
2. The nozzle according to claim 1 characterised by the fact that the holes (5) are situated on at least one side of the tip (4).
3. The nozzle according to claim 1 or 2 characterised by the fact that the holes (5) are preferably in the form of an arc section (6).
4. The nozzle according to claim 1 or 2 or 3 characterised by the fact that the holes (5) are situated in the direct neighbourhood of an appropriately shaped mechanical obstacle (7).
EP01948147A 2001-05-04 2001-07-09 Multi-hole nozzle Withdrawn EP1387949A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PL34739901 2001-05-04
PL347399A PL202458B1 (en) 2001-05-04 2001-05-04 Atomiser for use holes
PCT/PL2001/000058 WO2002090764A1 (en) 2001-05-04 2001-07-09 Multi-hole nozzle

Publications (1)

Publication Number Publication Date
EP1387949A1 true EP1387949A1 (en) 2004-02-11

Family

ID=20078714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01948147A Withdrawn EP1387949A1 (en) 2001-05-04 2001-07-09 Multi-hole nozzle

Country Status (3)

Country Link
EP (1) EP1387949A1 (en)
PL (1) PL202458B1 (en)
WO (1) WO2002090764A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10361762A1 (en) * 2003-12-29 2005-07-28 Robert Bosch Gmbh Fuel injector
US9803552B2 (en) 2015-10-30 2017-10-31 General Electric Company Turbine engine fuel injection system and methods of assembling the same
CN106837639A (en) * 2017-04-13 2017-06-13 沈阳航空航天大学 A kind of close collision formula dual fuel engine nozzle assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR392089A (en) * 1907-07-11 1908-11-17 Knut Jonas Elias Hesselman Burner for combustion engines
GB400836A (en) * 1932-03-19 1933-11-02 Schweizerische Lokomotiv Improvements in or relating to fuel nozzles for internal combustion engines
US5026462A (en) * 1990-03-06 1991-06-25 Ail Corporation Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles
US5211340A (en) * 1991-08-27 1993-05-18 Zexel Corporation Fuel injector
JPH0842428A (en) * 1994-07-29 1996-02-13 Zexel Corp Impact type fuel injection nozzle and manufacture thereof
DE19726727A1 (en) * 1997-06-24 1999-01-07 Bosch Gmbh Robert Fuel injector or fuel injector
JP2001165017A (en) * 1998-12-14 2001-06-19 Denso Corp Fuel injection nozzle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02090764A1 *

Also Published As

Publication number Publication date
PL202458B1 (en) 2009-06-30
WO2002090764A1 (en) 2002-11-14
PL347399A1 (en) 2002-11-18

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