US4211520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing control for sleeve metering fuel system
Assignee: Caterpillar Inc
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Filing: 1978-01-20
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Granted: 1980-07-08
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Expires: 1998-01-20
Abstract
Abstract The invention relates to an improvement in an engine fuel pump having a fill port in a plunger closed and opened during plunger strokes by a face of a relatively stationary barrel surrounding the plunger. A spill port in the plunger is closed and opened during plunger strokes by a relatively stationary collar surrounding the plunger and a linkage structure is operable by a governor or the like for adjusting the collar axially on the plunger to vary the separation of the barrel face from the collar and thereby the volume of fuel delivered per plunger stroke. The improvement of the invention comprises an oblique surface serving as the barrel face along with apparatus for adjustably setting the angular position of the plunger about its axes and thereby adjusting injection timing.
Inventors
- 👤 Stanley J. Kranc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:56
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/20; F02M59/36; F02M59/361; F02M59/24; F02M59/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
128 words
In an engine fuel pump having a fill port in a plunger closed and opened during plunger strokes by a face of a relatively stationary barrel surrounding the plunger, a spill port in said plunger closed and opened during plunger strokes by a relatively stationary collar surrounding the plunger and linkage means operable by a governor or the like for adjusting the collar axially on said plunger to vary the separation of the barrel face from the collar and thereby the volume of fuel delivered per plunger stroke, an improvement comprising: an oblique surface serving as said barrel face; and means for engaging said collar and plunger for adjustably setting the angular position of said plunger about its cylindrical axis to adjust injection timing of said fuel pump.
Claim 2
Dependent Claim
128 words
In an engine fuel pump having a fill port in a plunger closed and opened during plunger strokes by a face of a relatively stationary barrel surrounding the plunger, a spill port in said plunger closed and opened during plunger strokes by a relatively stationary collar surrounding the plunger and linkage means operable by a governor or the like for adjusting the collar axially on said plunger to vary the separation of the barrel face from the collar and thereby the volume of fuel delivered per plunger stroke, an improvement comprising: an oblique surface serving as said barrel face; and means for engaging said collar and plunger for adjustably setting the angular position of said plunger about its cylindrical axis to adjust injection timing of said fuel pump.
Claim 3
Dependent Claim
143 words
In an engine fuel pump having a fill port in a plunger closed and opened during plunger strokes by a face of a relatively stationary barrel surrounding the plunger, a spill port in said plunger closed and opened during plunger strokes by a relatively stationary collar surrounding the plunger and linkage means operable by a governor or the like for adjusting the collar axially on said plunger to vary the separation of the barrel face from the collar and thereby the volume of fuel delivered per plunger stroke, an improvement comprising: an oblique surface serving as said barrel face: and means for adjustably setting the angular position of said plunger about its cylindrical axes, wherein said adjustable angular position setting means comprises a motivating means carried by said collar and a motivated means carried by said plunger and engaged with said motivating means.
Claim 4
Dependent Claim
143 words
In an engine fuel pump having a fill port in a plunger closed and opened during plunger strokes by a face of a relatively stationary barrel surrounding the plunger, a spill port in said plunger closed and opened during plunger strokes by a relatively stationary collar surrounding the plunger and linkage means operable by a governor or the like for adjusting the collar axially on said plunger to vary the separation of the barrel face from the collar and thereby the volume of fuel delivered per plunger stroke, an improvement comprising: an oblique surface serving as said barrel face: and means for adjustably setting the angular position of said plunger about its cylindrical axes, wherein said adjustable angular position setting means comprises a motivating means carried by said collar and a motivated means carried by said plunger and engaged with said motivating means.
Claim 5
Dependent Claim
20 words
An improvement as in claim 2, wherein said motivating means comprises post means and said motivated means comprises slot means.
Claim 6
Dependent Claim
19 words
An improvement as in claim 3, wherein said slot means extends longitudinally along outer cylindrical surface of said plunger.
Claim 7
Dependent Claim
76 words
An improvement as in claim 2, wherein said fuel pump is one of a plurality of fuel pumps of a multicylinder engine, said adjustable setting means simultaneously adjustably sets the angular positions of each of the plungers of said plurality of fuel pumps about their cylindrical axes, said motivating means are carried by each of the respective collars and said motivated means are carried by each of said plungers and engaged with the respective motivating means.
Claim 8
Dependent Claim
22 words
An improvement as in claim 5, including means for motivating said adjustable angular position setting means responsive to changes in engine load.
Claim 9
Dependent Claim
24 words
An improvement as in claim 6, wherein said adjustable angular position setting means further comprises: means for adjustably rotating said collars about their axes.
Claim 10
Dependent Claim
22 words
An improvement as in claim 7, wherein said collar rotating means comprises rack means engaged with outer cylindrical surfaces of said collars.
Claim 11
Dependent Claim
20 words
An improvement as in claim 8, wherein said motivating means comprises post means and said motivated means comprises slot means.
Claim 12
Dependent Claim
19 words
An improvement as in claim 9, wherein said slot means extends longitudinally along outer cylindrical surfaces of said plungers.
Claim 13
Dependent Claim
24 words
An improvement as in claim 2, wherein said adjustable angular position setting means further comprises: means for adjustably rotating said collars about their axes.
Claim 14
Dependent Claim
22 words
An improvement as in claim 11, wherein said collar rotating means comprises rack means engaged with outer cylindrical surfaces of said collars.
Claim 15
Dependent Claim
20 words
An improvement as in claim 12, wherein said motivating means comprises post means and said motivated means comprises slot means.
Claim 16
Dependent Claim
19 words
An improvement as in claim 13, wherein said slot means extends longitudinally along outer cylindrical surfaces of said plungers.
Claim 17
Dependent Claim
78 words
An improvement as in claim 11, wherein said collar rotating means comprises cam means on a respective one of the outer cylindrical surfaces of each of said collars and stationary means thereadjacent and cam follower means on a respective other of said outer cylindrical surfaces of said collars and said stationary means, said collars each rotating as they are moved axially by said linkage means due to the interaction of said cam means and said cam follower means.
Claim 18
Dependent Claim
22 words
An improvement as in claim 15, wherein said cam means comprise oblique slots and said cam follower means comprise cam post means.
Claim 19
Dependent Claim
20 words
An improvement as in claim 16, wherein said motivating means comprises post means and said motivated means comprises slot means.
Claim 20
Dependent Claim
19 words
An improvement as in claim 17, wherein said slot means extends longitudinally along outer cylindrical surfaces of said plungers.
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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) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |