US3370539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double injection pump for internal combustion engines
Assignee: IFP Energies nouvelles
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Filing: 1966-09-20
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Granted: 1968-02-27
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Eyzat Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/02; F02M41/06; F02M41/063; F02M45/00; F02M45/02; F02M45/04; F02M45/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
338 words
A FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES, PERMITTING TWO INJECTIONS PER ENGINE CYCLE IN EACH CYLINDER, SAID INJECTIONS COMPRISING A PRINCIPAL INJECTION AT THE END OF THE COMPRESSON STROKE OF SAID ENGINE, AND A SECONDARY INJECTION PRECEDING SAID PRINCIPAL INJECTION, SAID PUMP COMPRISING: (A) A PUMP SHAFT; (B) A PUMP HOUSING PROVIDED WITH A CYLINDRICAL BORE COMMUNICATING WITH AN ANNULAR SPACE; (C) FEED ORIFICES AND DISCHARGES ORIFICES OPENING IN SAID BORE; (D) A ROTATABLE DISTRIBUTOR PISTON COAXIALLY MOUNTED IN SAID BORE WITH A SMALL CLEARANCE BETWEEN SAID PISTON AND SAID BORE; (E) MEANS FOR DISPLACING SAID PISTON ALONG A DIRECTION PARALLEL TO ITS AXIS OF ROTATION; (F) MEANS FOR ROTATING SAID PISTON ABOUT ITS AXIS, DRIVEN BY SAID PUMP SHAFT; (G) A PLURALITY OF FUEL FEEDING GROOVES LOCATED IN THE CYLINDRICAL SURFACE AND SAID DISTRIBUTOR PISTON AND COMMUNICATING WITH SAID ANNULAR SPACE: (H) A FIRST DISCHARGE GROOVE LOCATED IN SAID CYLINDRICAL SURFACE AND IN PERMANENT COMMUNICATION WITH ONE OF SAID FUEL FEEDING GROOVES; (I) A SECOND DISCHARGE GROOVE LOCATED IN A SAID CYLINDRICAL SURFACE AND PERMANENTLY COMMUNICATING WITH ANOTHER OF SAID FUEL FEEDING GROOVES, WHEREBY ROTATION OF SAID ROTATABLE DISTRIBUTOR PISTON INTERMITTENTLY CONNECTS SAID FEED ORFICES THROUGH SAID FUEL FEEDING GROOVES WITH SAID ANNULAR SPACE PROVIDING A FUEL CHARGE THEREIN, AND SAID DISCHARGE GROOVES INTERMITTENTLY CONNECT SAID ANNULAR SPACE PROVIDING A FUEL CHARGE ORIFICES FOR DELIVERING SAID FUEL CHARGE, THE AMOUNT OF SAID FUEL CHARGE DELIVERED THROUGH BOTH OF SAID DISCHARGE GROOVES BEING SIMULTANEOUSLY REGULATED BY SAID MEANS FOR DISPLACING SAID PISTON ALONG A DIRECTION PARALLEL TO ITS AXIS OF ROTATION; AND (J) MEANS FOR FORCING SAID FUEL FROM SAID ANNULAR SPACE THROUGH SAID FEED AND DISCHARGE GROOVES TO SAID DISCHARGE ORIFICES, WHEREIN SAID SECOND DISCHARGE GROOVES HAS A LEADING EDGE CORRESPONDING, WITH SAID DISTRIBUTOR PISTON IN POSITION FOR THE BEGINNING OF SAID SECONDARY INJECTION AT A LOW CHARGE, TO A STRAIGHT TANGENT TO THE DISCHARGE ORIFICE ON THE LEADING EDGE THEREOF AND HAVING A SLOPE WITH RESPECT TO THE AXIS OF THE DISTRIBUTOR PISTON, EQUAL TO
Claim 2
Dependent Claim
338 words
A FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES, PERMITTING TWO INJECTIONS PER ENGINE CYCLE IN EACH CYLINDER, SAID INJECTIONS COMPRISING A PRINCIPAL INJECTION AT THE END OF THE COMPRESSON STROKE OF SAID ENGINE, AND A SECONDARY INJECTION PRECEDING SAID PRINCIPAL INJECTION, SAID PUMP COMPRISING: (A) A PUMP SHAFT; (B) A PUMP HOUSING PROVIDED WITH A CYLINDRICAL BORE COMMUNICATING WITH AN ANNULAR SPACE; (C) FEED ORIFICES AND DISCHARGES ORIFICES OPENING IN SAID BORE; (D) A ROTATABLE DISTRIBUTOR PISTON COAXIALLY MOUNTED IN SAID BORE WITH A SMALL CLEARANCE BETWEEN SAID PISTON AND SAID BORE; (E) MEANS FOR DISPLACING SAID PISTON ALONG A DIRECTION PARALLEL TO ITS AXIS OF ROTATION; (F) MEANS FOR ROTATING SAID PISTON ABOUT ITS AXIS, DRIVEN BY SAID PUMP SHAFT; (G) A PLURALITY OF FUEL FEEDING GROOVES LOCATED IN THE CYLINDRICAL SURFACE AND SAID DISTRIBUTOR PISTON AND COMMUNICATING WITH SAID ANNULAR SPACE: (H) A FIRST DISCHARGE GROOVE LOCATED IN SAID CYLINDRICAL SURFACE AND IN PERMANENT COMMUNICATION WITH ONE OF SAID FUEL FEEDING GROOVES; (I) A SECOND DISCHARGE GROOVE LOCATED IN A SAID CYLINDRICAL SURFACE AND PERMANENTLY COMMUNICATING WITH ANOTHER OF SAID FUEL FEEDING GROOVES, WHEREBY ROTATION OF SAID ROTATABLE DISTRIBUTOR PISTON INTERMITTENTLY CONNECTS SAID FEED ORFICES THROUGH SAID FUEL FEEDING GROOVES WITH SAID ANNULAR SPACE PROVIDING A FUEL CHARGE THEREIN, AND SAID DISCHARGE GROOVES INTERMITTENTLY CONNECT SAID ANNULAR SPACE PROVIDING A FUEL CHARGE ORIFICES FOR DELIVERING SAID FUEL CHARGE, THE AMOUNT OF SAID FUEL CHARGE DELIVERED THROUGH BOTH OF SAID DISCHARGE GROOVES BEING SIMULTANEOUSLY REGULATED BY SAID MEANS FOR DISPLACING SAID PISTON ALONG A DIRECTION PARALLEL TO ITS AXIS OF ROTATION; AND (J) MEANS FOR FORCING SAID FUEL FROM SAID ANNULAR SPACE THROUGH SAID FEED AND DISCHARGE GROOVES TO SAID DISCHARGE ORIFICES, WHEREIN SAID SECOND DISCHARGE GROOVES HAS A LEADING EDGE CORRESPONDING, WITH SAID DISTRIBUTOR PISTON IN POSITION FOR THE BEGINNING OF SAID SECONDARY INJECTION AT A LOW CHARGE, TO A STRAIGHT TANGENT TO THE DISCHARGE ORIFICE ON THE LEADING EDGE THEREOF AND HAVING A SLOPE WITH RESPECT TO THE AXIS OF THE DISTRIBUTOR PISTON, EQUAL TO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |