US3978837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for automatic speed control of a diesel engine
Assignee: US Philips Corp
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Filing: 1974-12-06
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Granted: 1976-09-07
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Expires: 1994-12-06
Abstract
Abstract An automatic speed control device for a diesel engine including a closed control circuit for controlling the power fuel supply. Said means comprise a hydraulic adjusting device which is on/off operative dependent on an error signal. The device comprises a working cylinder with a movable working piston to one end of which a hydraulic or pneumatic control pressure medium is supplied directly, and to the other end of which indirectly via a predetermined volume of a hydraulic liquid, which is fed to the working cylinder through a pipe with a control valve. The control valve delimits in its closed position a portion of the hydraulic liquid to the space between the valve and the working piston. Separating means are provided to prevent mixing of hydraulic liquid and control pressure medium for maintaining the incompressibility of the liquid and make possible a distinct step-by-step control of the position of the working piston. A mechanical coupling is provided so as to transform the translational movement of the piston to a rotational movement such that the turning angle increases with an increasing engine load.
Inventors
- 👤 Karl-Erik Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:21
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/38; F02D1/00; F02D1/02; F02D1/08; F02D1/12; F02D31/00; F02D31/001; F02D31/007; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
294 words
A device for control of fuel flow for automatic speed control of an associated diesel engine having an associated fuel control device for controlling the fuel to the diesel engine which comprises: a working cylinder and a working piston, said working piston being movable responsive to fluid pressure on each side thereof; means coupling said working piston to the associated fuel control device to vary the quantity of fuel delivered to the associated diesel engine as a function of the working piston position; a first fluid conduit in fluid communication with said working cylinder and one side of said working piston; a second fluid conduit in fluid communication with said working cylinder and the other side of said working piston; a first valve element disposed in series with said second fluid conduit; means for balancing two fluid pressures between first and second parts thereof without mixing the two fluids under pressure, one part of said means for balancing being in fluid communication with said second fluidconduit; fluid conduit; a first valve in fluid communication with said second part of said means for balancing which selectively connects said second part of said means for balancing to ambient or an associated source of fluid pressure; a second valve in fluid communication with said first fluid conduit which selectively connects said first fluid conduit to ambient or the associated source of fluid pressure; means for producing a first signal which is a function of the speed of the associated diesel engine; means for producing a second signal which is a function of a predetermined engine speed; means for comparing said first signal and said second signal; and means for controlling said first valve element, said first valve and said second valve responsive to said means for comparing.
Claim 2
Independent Claim
294 words
A device for control of fuel flow for automatic speed control of an associated diesel engine having an associated fuel control device for controlling the fuel to the diesel engine which comprises: a working cylinder and a working piston, said working piston being movable responsive to fluid pressure on each side thereof; means coupling said working piston to the associated fuel control device to vary the quantity of fuel delivered to the associated diesel engine as a function of the working piston position; a first fluid conduit in fluid communication with said working cylinder and one side of said working piston; a second fluid conduit in fluid communication with said working cylinder and the other side of said working piston; a first valve element disposed in series with said second fluid conduit; means for balancing two fluid pressures between first and second parts thereof without mixing the two fluids under pressure, one part of said means for balancing being in fluid communication with said second fluidconduit; fluid conduit; a first valve in fluid communication with said second part of said means for balancing which selectively connects said second part of said means for balancing to ambient or an associated source of fluid pressure; a second valve in fluid communication with said first fluid conduit which selectively connects said first fluid conduit to ambient or the associated source of fluid pressure; means for producing a first signal which is a function of the speed of the associated diesel engine; means for producing a second signal which is a function of a predetermined engine speed; means for comparing said first signal and said second signal; and means for controlling said first valve element, said first valve and said second valve responsive to said means for comparing.
Claim 3
Dependent Claim
53 words
The apparatus as described in claim 1, wherein said means for balancing is a cylinder and piston assembly and said first part is the axial section of said cylinder on one side of said piston and said second part is the axial section of said cylinder on the other side of said piston.
Claim 4
Dependent Claim
45 words
The apparatus as described in claim 1, wherein said second conduit is bifurcated in at least one axial section thereof, said first valve element being disposed in one of the bifurcations, said device further including a second valve element in the other of the bifurcations.
Claim 5
Dependent Claim
16 words
The apparatus as described in claim 3, wherein said second fluid conduit has a liquid therein.
Claim 6
Dependent Claim
15 words
The apparatus as described in claim 4, wherein said first conduit has a gas therein.
Claim 7
Dependent Claim
12 words
The apparatus as described in claim 5, wherein said gas is air.
Claim 8
Dependent Claim
23 words
The apparatus as described in claim 1 further including means for cooperation with said working piston for converting rectilinear motion to rotational motion.
Claim 9
Dependent Claim
39 words
The apparatus as described in claim 1 further including means for producing a position signal which is a function of the position of said working piston, and wherein said means for controlling is also responsive to said position signal.
Claim 10
Dependent Claim
22 words
The apparatus as described in claim 1 wherein said associate source of fluid pressure is an associated source of air under pressure.
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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |