US3926163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for stopping an internal combustion engine with fuel injection in case of overspeed
Assignee: Everllence France SAS
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Filing: 1974-05-28
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Granted: 1975-12-16
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Expires: 1994-05-28
Abstract
Abstract Method and device for stopping in case of overspeed an internal combustion engine having fuel injection pumps of the constant stroke, reciprocating piston type, in which a pad defines in the pump body two separate closed chambers, wherein a compressed inert gas is fed in the second chamber for separating the pump piston from its tappet and thereby stopping the injection pump.
Inventors
- 👤 Dirk Bastenhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
F; F02; F02M; F02M63/00; F02M63/02; F02M63/0205; F02M63/021
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
204 words
A method of stopping an internal combustion engine, in case of overspeed, including fuel injection pumps of the constant-stroke, reciprocating piston type, each of said pumps comprising a pump body, having a pump cylinder and an intermediate cylinder adjacent to and in alignment with the pump cylinder, a pump piston in the pump cylinder, a drive tappet for driving said piston, an intermediate drive piston disposed in the intermediate cylinder between said pump piston and said drive tappet and being combined therewith, said intermediate drive piston defining within said body a pair of separated closed chambers, a first one of which contains said pump piston and a second one of which contains said tappet, said method comprising a source of pressurized gaseous fluid sensing an engine overspeed condition, and feeding in response to the sensing of overspeed of the engine pressurized gaseous fluid from the source into the second chamber, the pressurized gaseous fluid having a pressure high enough when fed into the second chamber to urge the intermediate drive piston toward the first chamber and to disengage and separate the intermediate drive piston and thereby the pump piston from being driven by the drive tappet and to thereby stop the corresponding injection pump.
Claim 2
Independent Claim
204 words
A method of stopping an internal combustion engine, in case of overspeed, including fuel injection pumps of the constant-stroke, reciprocating piston type, each of said pumps comprising a pump body, having a pump cylinder and an intermediate cylinder adjacent to and in alignment with the pump cylinder, a pump piston in the pump cylinder, a drive tappet for driving said piston, an intermediate drive piston disposed in the intermediate cylinder between said pump piston and said drive tappet and being combined therewith, said intermediate drive piston defining within said body a pair of separated closed chambers, a first one of which contains said pump piston and a second one of which contains said tappet, said method comprising a source of pressurized gaseous fluid sensing an engine overspeed condition, and feeding in response to the sensing of overspeed of the engine pressurized gaseous fluid from the source into the second chamber, the pressurized gaseous fluid having a pressure high enough when fed into the second chamber to urge the intermediate drive piston toward the first chamber and to disengage and separate the intermediate drive piston and thereby the pump piston from being driven by the drive tappet and to thereby stop the corresponding injection pump.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein said gaseous fluid is an inert gas.
Claim 4
Dependent Claim
12 words
A method according to claim 1, wherein said gaseous fluid is air.
Claim 5
Independent Claim
149 words
A device for stopping an internal combustion enGine in case of overspeed including fuel injection pumps of the constantstroke, reciprocating piston type, each of said pumps comprising a pump body, a piston, a drive tappet for driving the piston, a hollow cylinder closed at one end and slidably mounted within said pump body between said piston and said tappet and defining within said pump body a pair of separated closed chambers, a first one of which contains said piston and the second one of which contains said tappet, said device comprising a source of pressurized gaseous fluid, and means for providing a communication between said source and said second chamber for feeding said pressurized gaseous fluid into said second chamber, said gaseous fluid having a pressure high enough for disengaging and separating said hollow cylinder and thereby said piston from said drive tappet to thereby stop said injection pump.
Claim 6
Independent Claim
149 words
A device for stopping an internal combustion enGine in case of overspeed including fuel injection pumps of the constantstroke, reciprocating piston type, each of said pumps comprising a pump body, a piston, a drive tappet for driving the piston, a hollow cylinder closed at one end and slidably mounted within said pump body between said piston and said tappet and defining within said pump body a pair of separated closed chambers, a first one of which contains said piston and the second one of which contains said tappet, said device comprising a source of pressurized gaseous fluid, and means for providing a communication between said source and said second chamber for feeding said pressurized gaseous fluid into said second chamber, said gaseous fluid having a pressure high enough for disengaging and separating said hollow cylinder and thereby said piston from said drive tappet to thereby stop said injection pump.
Claim 7
Dependent Claim
64 words
A device according to claim 4, wherein said second chamber has a fuel lead recovering duct extending from the interior to the exterior of the second chamber, valve means for connecting the duct to the source of pressurized gaseous fluid and an overspeed-sensitive triggering device connected to the valve means for releasing pressurized gaseous fluid into the duct in response to an overspeed condition.
Claim 8
Dependent Claim
14 words
A device according to claim 4, wherein said gaseous fluid is an inert gas.
Claim 9
Dependent Claim
12 words
A device according to claim 4, wherein said gaseous fluid is air.
Claim 10
Dependent Claim
31 words
A device according to claim 4, wherein said first chamber includes venting means for allowing the exhaust of pressurized gaseous fluid leaks flowing from said second chamber into said first chamber.
Claim 11
Dependent Claim
14 words
A device according to claim 8, wherein said venting means is a check valve.
Claim 12
Dependent Claim
13 words
A device according to claim 8, wherein the venting means is a snifting-valve.
Claim 13
Dependent Claim
26 words
A device according to claim 8, wherein said injection pump comprises a control toothed rack, and said venting means comprises grooves formed in said toothed rack.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |