GB2211548A - I.C. engine fuel injection nozzle - Google Patents

I.C. engine fuel injection nozzle Download PDF

Info

Publication number
GB2211548A
GB2211548A GB8725167A GB8725167A GB2211548A GB 2211548 A GB2211548 A GB 2211548A GB 8725167 A GB8725167 A GB 8725167A GB 8725167 A GB8725167 A GB 8725167A GB 2211548 A GB2211548 A GB 2211548A
Authority
GB
United Kingdom
Prior art keywords
ball
seating
valve member
recesses
locating
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Withdrawn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
GB8725167A
Other versions
GB8725167D0 (en
Inventor
David John Gaskell
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB8725167A priority Critical patent/GB2211548A/en
Publication of GB8725167D0 publication Critical patent/GB8725167D0/en
Publication of GB2211548A publication Critical patent/GB2211548A/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Withdrawn legal-status Critical Current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
    • 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
    • F02M61/042—The valves being provided with fuel passages

Abstract

A ball valve member 15 has an annular seat band portion 23 which in the closed position of the ball co-operates with the seating 12 to prevent fuel flow to the outlets 14. A pair of recesses 24 are defined downstream of the seat band portion 23 and between them define a locating band 25 which is extended at 25A upstream of the seat band portion between a further pair of recesses 26. When the ball is moved angularly by movement of the actuator rod end 19 from the seating recess 20 to the recess 21 the recesses 24 and 26 provide communication across the seating 12. <IMAGE>

Description

"FUEL INJECTION NOZZLE" This invention relates to a fuel injection nozzle for supplying fuel to an internal combustion engine and of the kind comprising a valve member which can co-operate with a seating to prevent flow of fuel through the nozzle and which is movable relative to the seating to permit flow of fuel through an outlet of the nozzle downstream of the seating.
The object of the invention is to provide a fuel injection nozzle of the kind specified in a simple and convenient form.
According to the invention a fuel injection nozzle for supplying fuel to an internal combustion engine comprises a nozzle body in which is formed an annular conical seating, a valve member in the form of a ball for co-operation with the seating, said valve member in the closed position thereof defining an annular seat band portion which engages the seating and on the downstream side of said seat band portion, at least one locating band defined by the surface of said ball, said locating band being defined by recesses formed in said ball on opposite sides of the locating band, and means for moving the ball angularly about its axis to expose said recesses to the upstream side of said seating thereby to allow fuel flow through the outlet of the nozzle.
An example of a fuel injection nozzle in accordance with the invention will now be described with reference to the accompanying drawings in which: Figure 1 is a part sectional side elevation of part of the nozzle, and Figure 2 is a perspective view of the valve member of the nozzle.
With reference to the drawings the nozzle comprises a nozzle body 10 in which is formed a blind bore 11 at the end of which is formed a frusto-conical seating 12. The seating leads into a so-called "sac" volume 13 from which extends outlet orifices 14.
For engagement with the seating 12 there is provided a valve member in the form of a ball 15 the centre of which is indicated at 16. The ball is formed with a generally wedge-shaped slot 17 into which extends an actuating member 18 of rod-like form having a spherical end 19. The inner portion of the slot is shaped to define a pair of part spherical portions 20, 21 which merge and define between them a cusp 22. The actuating member 18 forms a toggle link which when actuated causes the ball to roll about its centre. In one position of the valve member hereinafter called the closed position, the end 19 of the actuating member lies in the portion 20 of the slot and in the other position hereinafter called the open position, the end 19 lies in the portion 21 of the slot. The two positions are stable by virtue of the cusp 22.
As more clearly seen in Figure 2, the ball forming the valve member defines an annular seat band portion 23 which in the closed position of the valve member engages with the seating to prevent flow of fuel through the outlet orifices from an inlet which is connected to the bore 11. Below the seat band portion as seen in Figure 2, the surface of the ball is machined away to define a pair of recesses 24 which are separated by a so-called locating band 25. As the valve member rotates the locating band maintains contact with the seating and the locating band 25 is extended at 25A beyond the seat band portion 23 by the provision of a further pair of recesses 26 in the surface of the ball.
In the closed position of the valve member the recesses 26 lie within the bore but as the valve member is moved angularly about its centre, the recesses 26 provide paths for the flow of fuel from the bore 11 into the sac volume 13 and therefore the outlets 14.
In addition the recesses 24 also define paths for the flow of fuel. As the valve member rotates the locating bands 25 and 25A remain in engagement with the seating to support the valve member and the surfaces of the locating bands are part of the spherical surface of the ball. If desired additional locating bands may be provided which extend generally parallel to each other, the ball between the locating bands, where more than one are provided, being recessed to serve as a flow path for the flow of fuel from the bore 11 to the sac volume and the outlets 14.

Claims (4)

1. A fuel injection nozzle for supplying fuel to an internal combustion engine comprising a nozzle body in which is formed an annular conical seating, a valve member in the form of a ball for co-operation with the seating, said valve member defining an annular seat band portion which in the closed position of the valve member engages the seating the valve member also defining on the downstream side of the seat band portion, at least one locating band which is part of the surface of the ball, the ball having recesses defined on the opposite sides of the locating band and which when the ball is moved angularly about its axis are exposed to the upstream side of the seating to allow fuel flow between an inlet and an outlet.
2. A nozzle according to Claim 1 in which said locating band extends on the upstream side of the seat band portion and the ball has a further pair of recesses defined on opposite sides of the extended portion of the locating band, said further pair of recesses being exposed to the downstream side of the seating when the ball is moved angularly so that fuel flow takes place to the outlet through the first mentioned and further pair of recesses.
3. A nozzle according to Claim 1 or 2 including means for moving the ball angularly about its axis.
4. A fuel injection nozzle for supplying fuel to an internal conbustion engine comprising the combination and arrangement of parts substantially as hereinbefore described with reference to the accompanying drawings.
GB8725167A 1987-10-27 1987-10-27 I.C. engine fuel injection nozzle Withdrawn GB2211548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8725167A GB2211548A (en) 1987-10-27 1987-10-27 I.C. engine fuel injection nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8725167A GB2211548A (en) 1987-10-27 1987-10-27 I.C. engine fuel injection nozzle

Publications (2)

Publication Number Publication Date
GB8725167D0 GB8725167D0 (en) 1987-12-02
GB2211548A true GB2211548A (en) 1989-07-05

Family

ID=10625981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8725167A Withdrawn GB2211548A (en) 1987-10-27 1987-10-27 I.C. engine fuel injection nozzle

Country Status (1)

Country Link
GB (1) GB2211548A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254681A1 (en) * 2002-11-22 2004-06-09 Siemens Ag Injection nozzle, especially for gasoline engines, has asymmetrical space between valve needle end, valve seat so shape of needle end only follows shape of valve seat in sub-region

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10254681A1 (en) * 2002-11-22 2004-06-09 Siemens Ag Injection nozzle, especially for gasoline engines, has asymmetrical space between valve needle end, valve seat so shape of needle end only follows shape of valve seat in sub-region
DE10254681B4 (en) * 2002-11-22 2005-09-08 Siemens Ag Injection nozzle and injection method, and a manufacturing method for an injection nozzle

Also Published As

Publication number Publication date
GB8725167D0 (en) 1987-12-02

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)