US6338445B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injector
Assignee: Delphi International Operations Luxembourg SARL
•
Filing: 2000-10-05
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Granted: 2002-01-15
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Expires: 2020-10-05
Abstract
Abstract A fuel injector comprising a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening. The outer valve needle is provided with a second bore within which an inner valve needle is slidable, the inner valve needle being engageable with the second seating to control fuel delivery through a second outlet opening. The outer valve needle includes a deformable region which is shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle deforms. The deformable region may be shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle deforms to close the first outlet opening. Alternatively, or in addition, the deformable region may be shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle cooperates with the inner valve needle to form a substantially fluid tight seal. The fuel injector may further comprise a valve insert member received within an upper region of the second bore, the valve insert member being engageable with an additional seating defined by an open end of the second bore to permit fuel upstream of the inner valve needle to vent from the second bore.
Inventors
- 👤 Malcolm David Dick Lambert
- 👤 Peter Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:16
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/18; F02M61/1806; F02M61/182; F02M45/00; F02M45/02; F02M45/04; F02M45/08; F02M45/086; F02M47/00; F02M47/02; F02M47/027; F02M55/00; F02M55/002; F02M61/04; F02M61/06; F02M61/10; F02M61/12; F02M61/161; F02M2200/00; F02M2200/46; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/8704
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
145 words
A fuel injector comprising a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening, the outer valve needle being provided with a second bore within which an inner valve needle is slidable, the inner valve needle being engageable with the second seating to control fuel delivery through a second outlet opening, the outer valve needle including a deformable region which is shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle deforms, wherein the deformable region is shaped such that when the outer valve needle is urged against the first seating, the outer valve needle cooperates with the inner valve needle to form a substantially fluid tight seal.
Claim 2
Dependent Claim
145 words
A fuel injector comprising a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening, the outer valve needle being provided with a second bore within which an inner valve needle is slidable, the inner valve needle being engageable with the second seating to control fuel delivery through a second outlet opening, the outer valve needle including a deformable region which is shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle deforms, wherein the deformable region is shaped such that when the outer valve needle is urged against the first seating, the outer valve needle cooperates with the inner valve needle to form a substantially fluid tight seal.
Claim 3
Dependent Claim
41 words
The fuel injector as claimed in claim 1 , wherein the deformable region is shaped such that, in use, when the outer valve needle is urged against the first seating, the outer valve needle deforms to close the first outlet opening.
Claim 4
Dependent Claim
52 words
The fuel injector as claimed in claim 1 , wherein a chamber is defined within the second bore, whereby cooperation between the deformable region of the outer valve needle and the inner valve needle when the outer valve needle is urged against the first seating causes the chamber to be substantially sealed.
Claim 5
Dependent Claim
58 words
The fuel injector as claimed in claim 1 , wherein the inner valve needle and the outer valve needle are arranged such that movement of the outer valve needle away from the first seating beyond a predetermined amount is transmitted to the inner valve needle, thereby causing the inner valve needle to move away from the second seating.
Claim 6
Dependent Claim
56 words
The fuel injector as claimed in claim 4 , wherein the outer valve needle is provided with a surface which is engageable with a first region of the inner valve needle to transmit movement of the outer valve needle to the inner valve needle, wherein the first region and the surface are of substantially frusto-conical form.
Claim 7
Dependent Claim
44 words
The fuel injector as claimed in claim 5 , wherein the surface of the outer valve needle which is engageable with the first region of the inner valve needle is located on the outer valve needle at a position remote from the deformable region.
Claim 8
Dependent Claim
65 words
The fuel injector as claimed in claim 6 , wherein the inner valve needle comprises a second region located downstream of the first region, the second region being of substantially frusto-conical form such that stresses within the second region of the inner valve needle are minimized upon engagement between the surface of the outer valve needle and the first region of the inner valve needle.
Claim 9
Dependent Claim
64 words
The fuel injector as claimed in claim 1 , further comprising a valve insert member received within an upper region of the second bore, the valve insert member being engageable with an additional seating defined by the open end of the second bore remote from the inner valve needle to permit fuel upstream of the inner valve needle to vent from the second bore.
Claim 10
Dependent Claim
40 words
The fuel injector as claimed in claim 8 , further comprising a spacer member received within the second bore provided in the outer valve needle, the spacer member being interposed between the inner valve needle and the valve insert member.
Claim 11
Dependent Claim
212 words
A fuel injector comprising; a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening, the outer valve needle provided with a second bore within which an inner valve needle is slidable, the inner valve needle being engageable with the second seating to control fuel delivery through a second outlet opening, the outer valve needle including a deformable region which is shaped such that, when the outer valve needle is urged against the first seating, the outer valve needle deforms, wherein the inner valve needle and the outer valve needle are arranged such that movement of the outer valve needle away from the first seating beyond a predetermined amount is transmitted to the inner valve needle, thereby causing the inner valve needle to move away from the second seating, wherein the outer valve needle is provided with a substantially frusto-conical shaped surface which is engageable with a substantially frusto-conical shaped first region of the inner valve needle and is located on the outer valve needle at a position remote from the deformable region, to transmit movement of the outer valve needle to the inner valve needle.
Claim 12
Dependent Claim
212 words
A fuel injector comprising; a nozzle body having a first bore defining first and second seatings, an outer valve needle being slidable within the first bore and engageable with the first seating to control fuel flow from a first outlet opening, the outer valve needle provided with a second bore within which an inner valve needle is slidable, the inner valve needle being engageable with the second seating to control fuel delivery through a second outlet opening, the outer valve needle including a deformable region which is shaped such that, when the outer valve needle is urged against the first seating, the outer valve needle deforms, wherein the inner valve needle and the outer valve needle are arranged such that movement of the outer valve needle away from the first seating beyond a predetermined amount is transmitted to the inner valve needle, thereby causing the inner valve needle to move away from the second seating, wherein the outer valve needle is provided with a substantially frusto-conical shaped surface which is engageable with a substantially frusto-conical shaped first region of the inner valve needle and is located on the outer valve needle at a position remote from the deformable region, to transmit movement of the outer valve needle to the inner valve needle.
Claim 13
Dependent Claim
39 words
The fuel injector as claimed in claim 10 , wherein the deformable region is shaped such that when the outer valve needle is urged against the first seating, the outer valve needle deforms to close the first outlet opening.
Claim 14
Dependent Claim
45 words
The fuel injector as claimed in claim 10 , wherein the deformable region is shaped such that when the outer valve needle is urged against the first seating, the outer valve needle cooperates with the inner valve needle to form a substantially fluid tight seal.
Claim 15
Dependent Claim
52 words
The fuel injector as claimed in claim 10 , wherein a chamber is defined within the second bore, whereby cooperation between the deformable region of the outer valve needle and the inner valve needle when the outer valve needle is urged against the first seating causes the chamber to be substantially sealed.
Claim 16
Dependent Claim
65 words
The fuel injector as claimed in claim 10 , wherein the inner valve needle comprises a second region located downstream of the first region, the second region being of substantially frusto-conical form such that stresses within the second region of the inner valve needle are minimized upon engagement between the surface of the outer valve needle and the first region of the inner valve needle.
Claim 17
Dependent Claim
64 words
The fuel injector as claimed in claim 10 , further comprising a valve insert member received within an upper region of the second bore, the valve insert member being engageable with an additional seating defined by the open end of the second bore remote from the inner valve needle to permit fuel upstream of the inner valve needle to vent from the second bore.
Claim 18
Dependent Claim
40 words
The fuel injector as claimed in claim 10 , further comprising a spacer member received within the second bore provided in the outer valve needle, the spacer member being interposed between the inner valve needle and the valve insert member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-01-14 | 2005-07-16 | 2006-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-01-14 | 2009-07-16 | 2010-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-01-14 | 2013-07-16 | 2014-01-15 | $7700.00 | Window Closed / Lapsed |