Patent US3677256A successfully refreshed from Google Patents.
US3677256A
Expired / Lapsed
US
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Fuel injection device for an internal combustion engine
Assignee: Automobiles Peugeot SA
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Filing: 1970-08-26
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Granted: 1972-07-18
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Expires: 1990-08-26
Abstract
Abstract A fuel injection device for a pressure-ignited internal combustion engine having pumps in line, that is, in which each injection pump supplies fuel to one cylinder of the engine. There are in each piston and cylinder assembly of the injection pump, complementary means adapted to cooperate in at least one given angular position of, and in at least one part of the delivery stroke of, the piston so as to deduct a part of the fuel displaced in the course of said delivery stroke.
Inventors
- 👤 Marcel Regneault
- 👤 Maurice Le Creurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:57
CPC Classifications
F; F02; F02M; F02M45/00; F02M45/02; F02M45/04; F02M45/06; F02M45/066; F02M45/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A fuel injection device for a pressure-ignited internal combustion engine having series injection pumps, that is, in which each injection pump supplies fuel to one cylinder of the engine, said device comprising, in each piston and cylinder assembly of the injection pump, complementary means adapted to cooperate in at least one given angular position of, and in at least one part of the delivery stroke of, the piston so as to define a discharge path for the fuel and deduct a part of the fuel displaced in the course of said delivery stroke, said device further comprising a first fuel deducting device having a variable capacity chamber defined by a piston for receiving said deducted fuel and a second fuel deducting device (said two fuel deducting devices being) connected in series relation with said first deducting device, and a closing member controlled in accordance with a parameter of the operation of the engine such as the speed and/or the load of the engine to selectively allow and preclude communication between the two fuel deducting devices.
Claim 2
Dependent Claim
175 words
A fuel injection device for a pressure-ignited internal combustion engine having series injection pumps, that is, in which each injection pump supplies fuel to one cylinder of the engine, said device comprising, in each piston and cylinder assembly of the injection pump, complementary means adapted to cooperate in at least one given angular position of, and in at least one part of the delivery stroke of, the piston so as to define a discharge path for the fuel and deduct a part of the fuel displaced in the course of said delivery stroke, said device further comprising a first fuel deducting device having a variable capacity chamber defined by a piston for receiving said deducted fuel and a second fuel deducting device (said two fuel deducting devices being) connected in series relation with said first deducting device, and a closing member controlled in accordance with a parameter of the operation of the engine such as the speed and/or the load of the engine to selectively allow and preclude communication between the two fuel deducting devices.
Claim 3
Dependent Claim
23 words
A device as claimed in claim 1, wherein said closing member is adapted to be shifted by the acceleration lever of the engine.
Claim 4
Dependent Claim
26 words
A device as claimed in claim 1, wherein said second fuel deducting device comprises a variable-capacity chamber defined by a piston biased by elastically yieldable means.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 1 for an engine having a plurality of cylinders, wherein the second fuel deducting device and the closing member are in series with the fuel deducting devices corresponding to the respective cylinders of the engine.
Claim 6
Dependent Claim
41 words
A device as claimed in claim 1, wherein the second fuel deducting device comprises a variable-capacity chamber defined by a membrane having a face which is opposed to said variable capacity chamber and subjected to the action of a compressible fluid.
Claim 7
Dependent Claim
57 words
A device as claimed in claim 1, wherein said means comprises a cavity in a lateral wall of the piston, communicating with a delivery chamber of the pump and a throttling orifice in the wall of the delivery chamber, opening in said variable capacity chamber, said cavity being a recess which opens directly into said delivery chamber.
Claim 8
Dependent Claim
85 words
A device as claimed in claim 1, wherein said means comprises a cavity in a lateral wall of the piston, communicating with a delivery chamber of the pump and a throttling orifice in the wall of the delivery chamber, opening in said variable capacity chamber, said cavity being a recess which is separated from said delivery chamber by a portion of said lateral wall of the piston, a conduit being formed in the piston between an inner end of said recess and said delivery chamber.
Claim 9
Dependent Claim
15 words
A device as claimed in claim 7, wherein said recess has a substantially constant depth.
Claim 10
Dependent Claim
22 words
A device as claimed in claim 7, wherein said recess has a depth which varies along the circumferential extend of the recess.
References Cited (Backward Citations)
US1993759A
Cited
US2565681A
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US2575955A
Cited
US2794397A
Cited
GB725585A
Cited
US3456629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |