Patent US3752138A successfully refreshed from Google Patents.
US3752138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine injection pump operating all cylinders or less
Assignee: Navistar International Corp
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Filing: 1971-08-09
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Granted: 1973-08-14
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Expires: 1991-08-09
Abstract
Abstract Multi-cylinder engine, and injection pump for operating same on a fraction of the number of cylinders, then a greater fraction of that number and, finally, all of the cylinders when operating in all higher portions of the speed range. Viewed the other way, the pump operates all cylinders at full load, and cuts a plurality or pluralities of those cylinders out of operation until, at engine idle, the transition is made such that only a plurality of cylinders is still firing, and all such transition control is consolidated in a controlled fuel metering sleeve in the pump. The pump is of the rotary distributor type, and has a variable volume pump chamber portion whereof the pump chamber number is materially fewer than the number of engine cylinders and preferably is limited to one or two pump chambers.
Inventors
- 👤 J Gaines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:08
CPC Classifications
F; F02; F02M; F02M63/00; F02M63/02; F02M41/00; F02M41/08; F02M41/14; F02M41/1405; F02M41/1411; F02M59/00; F02M59/20; F02M59/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
249 words
A fuel injection pump for an engine having a number of cylinders and intended to idle on fewer than all of the number, said pump having a variable volume pump chamber portion whereof the pump chamber number is materially fewer than the number of engine cylinders and wherein the pump input drive produces pump strokes variable in effectiveness, a controlled sleeve having an individual spill duct for each of, and associated with each of, the engine cylinders and formed with a control edge inclined with respect to the sleeve axis, a pump shaft connected in the pump input drive, said pump shaft rotatably and slidably mounting said sleeve and presenting thereto a metering port in flow communication with the cylinders and with the variable volume pump chamber portion, the intersection of a control edge with the metering port determining the end of the effective pump stroke for each engine cylinder and thus the amount of the metered fuel charge pumped thereto, engine means for operating the pump shaft in timed relation to the operation of said engine cylinders, and slide means to slide the controlled sleeve for changing the control edge-metering port relationship and effective pump strokes of the pump chamber portion, said sleeve thus varying the metered charge to the individual cylinders, and having the control edge inclinations arranged so that some have greater inclination than others, whereby the charge to some cylinders decreases in like amount among themselves, but at a greater amount than in the others.
Claim 2
Dependent Claim
249 words
A fuel injection pump for an engine having a number of cylinders and intended to idle on fewer than all of the number, said pump having a variable volume pump chamber portion whereof the pump chamber number is materially fewer than the number of engine cylinders and wherein the pump input drive produces pump strokes variable in effectiveness, a controlled sleeve having an individual spill duct for each of, and associated with each of, the engine cylinders and formed with a control edge inclined with respect to the sleeve axis, a pump shaft connected in the pump input drive, said pump shaft rotatably and slidably mounting said sleeve and presenting thereto a metering port in flow communication with the cylinders and with the variable volume pump chamber portion, the intersection of a control edge with the metering port determining the end of the effective pump stroke for each engine cylinder and thus the amount of the metered fuel charge pumped thereto, engine means for operating the pump shaft in timed relation to the operation of said engine cylinders, and slide means to slide the controlled sleeve for changing the control edge-metering port relationship and effective pump strokes of the pump chamber portion, said sleeve thus varying the metered charge to the individual cylinders, and having the control edge inclinations arranged so that some have greater inclination than others, whereby the charge to some cylinders decreases in like amount among themselves, but at a greater amount than in the others.
Claim 3
Dependent Claim
279 words
A fuel injection pump for an engine having a number of cylinders and intended to idle on fewer than all of the number, said pump having a variable volume pump chamber portion whereof the pump chamber number is materially fewer than the number of engine cylinders and wherein the pump input drive produces pump strokes variable in effectiveness, a controlled sleeve having an individual spill duct for each of, and associated with each of, the enGine cylinders and formed with a control edge inclined with respect to the sleeve axis, a pump shaft connected in the pump input drive, said pump shaft rotatably and slidably mounting said sleeve and presenting thereto a metering port in flow communication with the cylinders and with the variable volume pump chamber portion, the intersection of a control edge with the metering port determining the end of the effective pump stroke for each engine cylinder and thus the amount of the metered fuel charge pumped thereto, engine means for operating the pump shaft in timed relation to the operation of said engine cylinders, and slide means to slide the controlled sleeve for changing the control edge-metering port relationship and effective pump strokes of the pump chamber portion, said sleeve thus varying the metered charge to the individual cylinders, and having the control edge inclinations arranged so that a parallety have greater inclination than others, whereby the charge to a plurality of said cylinders decreases in like amount among themselves, but at a greater amount than in the others, some of the just said plurality of control edge inclinations provided by first, second, and third edges on each spill duct, arranged offset from one another.
Claim 4
Dependent Claim
279 words
A fuel injection pump for an engine having a number of cylinders and intended to idle on fewer than all of the number, said pump having a variable volume pump chamber portion whereof the pump chamber number is materially fewer than the number of engine cylinders and wherein the pump input drive produces pump strokes variable in effectiveness, a controlled sleeve having an individual spill duct for each of, and associated with each of, the enGine cylinders and formed with a control edge inclined with respect to the sleeve axis, a pump shaft connected in the pump input drive, said pump shaft rotatably and slidably mounting said sleeve and presenting thereto a metering port in flow communication with the cylinders and with the variable volume pump chamber portion, the intersection of a control edge with the metering port determining the end of the effective pump stroke for each engine cylinder and thus the amount of the metered fuel charge pumped thereto, engine means for operating the pump shaft in timed relation to the operation of said engine cylinders, and slide means to slide the controlled sleeve for changing the control edge-metering port relationship and effective pump strokes of the pump chamber portion, said sleeve thus varying the metered charge to the individual cylinders, and having the control edge inclinations arranged so that a parallety have greater inclination than others, whereby the charge to a plurality of said cylinders decreases in like amount among themselves, but at a greater amount than in the others, some of the just said plurality of control edge inclinations provided by first, second, and third edges on each spill duct, arranged offset from one another.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |