Patent EP0042799A2 successfully refreshed from Google Patents.
EP0042799A2
Expired / Lapsed
EP
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Electromagnetic fuel injector
Assignee: Bendix Corp
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Filing: 1981-06-19
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Granted: —
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Expires: 2001-06-19
Abstract
Abstract An electromagnetic fuel injector having an energizable stator means (10) for controlling the movement of a valve member of a valve assembly (10) to open and close the injector and thereby meter fuel, said valve assembly comprising a valve housing (30, 32) including a valve housing bore (92) terminating with a valve seat (56) which is connected to an exit orifice, a valve assembly (60) including a valve (60) reciprocally located in said valve housing bore, operable to close said exit orifice by sealing said valve seat (56) with a ball valve (60), a swirl chamber (43) for imparting to the fuel flow exhausted from the exit orifice a swirl component that is tangential with respect to the spray axis of the injector, and means (40) for supplying fuel from a pressurized source to said swirl chamber, characterized in that said fuel supply means includes means (70) forming a hollow cylinder (42) of fuel between said source and said swirl chamber, and at least one orifice (52) communicating fuel between said fuel cylinder forming means (70) and said swirl chamber (43).
Inventors
- 👤 George Thomas Bata
- 👤 Paul Desmond Daly
- 👤 Richard Durbin Weaver
- 👤 Thomas Edward Hensley
- 👤 William Benjamin Claxton
- 👤 Louis George Degrace, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:44
CPC Classifications
F; F02; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/08; F02M61/00; F02M61/16; F02M61/162; F02M2200/00; F02M2200/50; F02M2200/505
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
181 words
An electromagnetic fuel injector having an energizable stator means (20) for controlling the movement of a valve member of a valve assembly (10) to open and close the injector and thereby meter fuel, said valve assembly comprising : a valve housing (30, 32) including a valve housing bore (92) terminating with a valve seat (56) which is connected to an-exit orifice, a valve assembly (60) including a valve (60) reciprocally located in said valve housing bore, operable to close said exit orifice by sealing said valve seat (56) with a ball valve (60), a swirl chamber (43) for imparting to the fuel flow exhausted from the exit orifice a swirl component that is tangential with respect to the spray axis of the injector, and means (40) for supplying fuel from a pressurized source to said swirl chamber, characterized in that said fuel supply means includes means (70) forming a hollow cylinder (42) of fuel between said source and said swirl chamber, and at least one orifice (52) communicating fuel between said fuel cylinder forming means (70) and said swirl chamber (43).
Claim 2
Dependent Claim
181 words
An electromagnetic fuel injector having an energizable stator means (20) for controlling the movement of a valve member of a valve assembly (10) to open and close the injector and thereby meter fuel, said valve assembly comprising : a valve housing (30, 32) including a valve housing bore (92) terminating with a valve seat (56) which is connected to an-exit orifice, a valve assembly (60) including a valve (60) reciprocally located in said valve housing bore, operable to close said exit orifice by sealing said valve seat (56) with a ball valve (60), a swirl chamber (43) for imparting to the fuel flow exhausted from the exit orifice a swirl component that is tangential with respect to the spray axis of the injector, and means (40) for supplying fuel from a pressurized source to said swirl chamber, characterized in that said fuel supply means includes means (70) forming a hollow cylinder (42) of fuel between said source and said swirl chamber, and at least one orifice (52) communicating fuel between said fuel cylinder forming means (70) and said swirl chamber (43).
Claim 3
Dependent Claim
28 words
An injector according to claim 1, characterized in that said orifice (52) is positioned proximate to the interface of said ball valve (60) and said valve seat (56).
Claim 4
Dependent Claim
26 words
An injector according to claim 2, characterized in that said cylinder forming means (70) is a sleeve (70) having at least one lip (72) formed thereon.
Claim 5
Dependent Claim
40 words
An injector according to claim 3, characterized in that said sleeve is formed as a generally thin walled hollow cylinder having an outwardly extending lip portion (72) which is adapted to engage the inner surface of said housing bore (92).
Claim 6
Dependent Claim
25 words
An injector according to claim 3, characterized in that said one orifice (52) is an aperture formed through said sleeve (70) adjacent said exit orifice.
Claim 7
Dependent Claim
25 words
An injector according to claim 3, characterized in that said one orifice (52) is a groove formed in said sleeve (70) adjacent said exit orifice.
Claim 8
Dependent Claim
22 words
An injector according to claim 5 or 6, characterized in that said orifice (52) is formed tangential to said housing bore (92).
Claim 9
Dependent Claim
67 words
An injector according to claim 1, wherein said valve assembly includes a valve armature (84) and a valve member including a ball valve (60) reciprocally located in said valve housing bore (92), a stem member (86) rigidly interconnecting said valve armature (84) and said ball valve (60), characterized in that said stem member (86) is formed of non-magnetic material to enhance the magnetic characteristics of said injector.
Claim 10
Dependent Claim
91 words
An injector according to claim 1, wherein said valve assembly includes a generally cylindrically shaped portion (84) positioned remote from said exit orifice, characterized in that it comprises means (96) for centering said cylindrical shaped portion (84) including shoulder means formed on an interior surface of said bore and concentric therewith, and bushing means positioned adjacent said shoulder means and having an interior surface closely fitting the exterior surface of said cylindrically shaped portion, said bushing being mounted for relative movement to one of said shoulder and said cylindrically shaped portion.
Claim 11
Dependent Claim
25 words
An injector according to claim 9, characterized in that said bushing (96) is positioned for relative movement between said bushing and said cylindrically shaped portion.
Claim 12
Dependent Claim
22 words
An injector according to claims 9 or 10, characterized in that said bushing is fabricated from DupontVespel SP-22 or Amoco Torlon 4301.
Claim 13
Dependent Claim
60 words
An injector according to claim 1, wherein said valve assembly includes a large area member (84) reciprocall y located in said valve housing bore, characterized in that said large area member is provided with aperture means (88) to permit the flow of fuel through said flat area member and reduce the drag of said flat area member through the fuel.
Claim 14
Dependent Claim
27 words
An injector according to claim 12, characterized in that said flat area member is a cup-shaped element, said flat area being the bottom of said cup-shaped element.
Claim 15
Dependent Claim
21 words
An injector according to claim 13, characterized in that said aperture means (88) includes at least one aperture in said bottom.
Claim 16
Dependent Claim
172 words
An injector according to claim 1, wherein said valve assembly comprises an armature assembly (84) movably mounted relative to said stator means (20) within said housing and movable into and out of engagement with the valve seat (56), said armature assembly being separable from said stator means by an air gap, means (140) resiliently biasing said armature means into engagement with the valve seat, and said resilient means being disposed between said stator means and said armature assembly and including spring means and a spring-guide element (142) engageable at one end with said stator means and at the other end with said spring means, said stator means including means (104) for adjusting the force of said resilient means exerts on said armature assembly, said adjusting means engaging said spring-guide element (142) and being rotatable to axially move said spring-guide element and vary the force on said armature assembly, characterized in that said spring-guide element . minimizes the transfer of rotary motion to said spring means to preclude windup of said spring means.
Claim 17
Dependent Claim
28 words
An injector according to claim 15, characterized in that said adjusting means is a pin having a small diameter relative to the transverse dimension of said spring-guide element.
Claim 18
Dependent Claim
34 words
An injector according to claim 16, characterized in that said spring means is a helical spring, said spring-guide element having a circular shoulder formed thereon to receive said other end of said spring means.
Claim 19
Dependent Claim
25 words
An injector according to claim 17, characterized in that the diameter of said spring means is substantially larger than the diameter of said pin means.
Claim 20
Dependent Claim
34 words
An injector according to claim 6, characterized in that said armature assembly includes a cup-shaped element (84), the open end of said cup-shaped element facing said resilient means and receiving said one end thereof.
Claim 21
Dependent Claim
52 words
An injector according to claim 14, wherein said stator means includes second adjusting means axially movable to adjust said air gap, said second adjustable means being rotatable relative to said spring, characterized in that said spring-guide element precludes the rotational motion of said second adjustable means from being transmitted to said spring.
References Cited (Backward Citations)
No citation records indexed.
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