US3595013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated supercharging devices for compression-ignition engines
Assignee: Societe Anonime de Vehicules Industriels et dEquipements SA SAVIEM
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Filing: 1969-01-27
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Granted: 1971-07-27
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Expires: 1989-01-27
Abstract
Abstract A compensated supercharging device for a compression-ignition engine cooled by a liquid at a regulated temperature and already supercharged by a turbosupercharger, said device tending to correct the known inconveniences of this type of supercharging by regulating the temperature and pressure of the air delivered by said turbosupercharger before it is introduced into the engine for all speed and load conditions of said engine.
Inventors
- 👤 Maurice G Brille
- 👤 Yves M Baguelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:00
CPC Classifications
F; F02; F02N; F02N19/00; F02B; F02B27/00; F02B27/04; F02B37/00; F02B37/04; F02B37/12; F02B37/14; F02B39/00; F02B39/02; F02B39/04; F02B39/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
255 words
A compensated supercharging device for a compression-ignition engine cooled by a liquid at a regulated temperature and already supercharged by a turbosupercharger, said device tending to correct the known deficiencies of this type of supercharging by regulating the temperature and pressure of the air delivered by said turbosupercharger before it is introduced into the engine for all speed and load conditions of said engine, said device comprising a duct connecting said turbosupercharger to said engine, a heat exchanger in said duct, means for circulating an engine cooling liquid through said heat exchanger at a regulated temperature, a volumetric air machine mounted in said duct between said exchanger and said engine, transmission means operatively connecting said volumetric air machine to a crankshaft of said engine so that the ratio of the speeds of said air machine and said engine will vary continuously between two limits, one of said limits producing an output volume of the machine which is greater than the engine cylinder cubic capacity so as to produce an over pressure and the other of said limits producing an output volume of said machine which is lower than that of said engine cylinder cubic capacity so as to expand the air pressure, a control diaphragm operatively connected to said transmission means to control said speed ratio variation in response to a reference pressure resulting from a predetermined combination of pressure prevailing upstream of said volumetric air machine and pressure prevailing downstream thereof, said speed ratio variation being controlled inversely to changes in said reference pressure.
Claim 2
Dependent Claim
255 words
A compensated supercharging device for a compression-ignition engine cooled by a liquid at a regulated temperature and already supercharged by a turbosupercharger, said device tending to correct the known deficiencies of this type of supercharging by regulating the temperature and pressure of the air delivered by said turbosupercharger before it is introduced into the engine for all speed and load conditions of said engine, said device comprising a duct connecting said turbosupercharger to said engine, a heat exchanger in said duct, means for circulating an engine cooling liquid through said heat exchanger at a regulated temperature, a volumetric air machine mounted in said duct between said exchanger and said engine, transmission means operatively connecting said volumetric air machine to a crankshaft of said engine so that the ratio of the speeds of said air machine and said engine will vary continuously between two limits, one of said limits producing an output volume of the machine which is greater than the engine cylinder cubic capacity so as to produce an over pressure and the other of said limits producing an output volume of said machine which is lower than that of said engine cylinder cubic capacity so as to expand the air pressure, a control diaphragm operatively connected to said transmission means to control said speed ratio variation in response to a reference pressure resulting from a predetermined combination of pressure prevailing upstream of said volumetric air machine and pressure prevailing downstream thereof, said speed ratio variation being controlled inversely to changes in said reference pressure.
Claim 3
Dependent Claim
27 words
A device as set forth in claim 1 in which said supercharger comprises a high efficiency turbosupercharger having the highest possible pressure ratio at maximum engine speed.
Claim 4
Dependent Claim
22 words
A device as set forth in claim 1 wherein said volumetric air machine comprises a gear pump having at least two teeth.
Claim 5
Dependent Claim
89 words
A device as set forth in claim 1 in which said transmission comprises a belt-type variable-Speed transmission having at least one variable-diameter grooved pulley, a swivel shaft means connecting said pulley to volumetric air machine, said swivel shaft means comprising a bearing, a universal joint and a resilient support, said swivel shaft means being relatively long so that the maximum amplitude of its swivel movements cannot exceed + or - 3*, the movements of the pulley flanges towards and away from each other being controlled by said reference pressure.
Claim 6
Dependent Claim
51 words
A device as set forth in claim 1 in which said transmission is of the hydraulic type and comprises a hydraulic pump and hydraulic motor assembly of the piston-barrel and swash-plate type, the speed variation resulting from the action exerted by said reference pressure on the inclination of said swash plate.
Claim 7
Dependent Claim
148 words
A device as set forth in claim 3 further comprising special starting means provided when said gear pump is rendered inoperative as a consequence of internal leakages at very low engine speeds, notably at engine starting speeds, said starting means being adapted, during the rotation of a starter motor of said engine, to inject upstream of said gear pump a liquid capable of adhering by surface tension to the internal surfaces of said pump so as to temporarily seal the leakages thereof, said injection means comprising a jet disposed at the inlet end of said duct, an electromagnetic valve and a liquid supply, the circuit for energizing said electromagnetic valve being established from a storage battery and said starter motor and comprising a switch responsive to a thermostatic control diaphragm capable of opening said circuit when the temperature of the engine cooling liquid has reached a sufficient value.
Claim 8
Dependent Claim
23 words
A device as set forth in claim 6 in which said sealing liquid comprises engine fuel supplied from the engine fuel feed pump.
Claim 9
Dependent Claim
93 words
A device as set forth in claim 3, further comprising means for minimizing the influence of leakages by increasing very considerable proportions the drive ratio of said gear pump, said means momentarily uncoupling said transmission and substituting therefor a direct step up gear providing a higher gear ratio, said uncoupling being controlled by a drive pinion of a starter motor through a linkage, the direct step up gear being obtained by the meshing action of said starting motor drive pinion on a tooth wheel mounted on a shaft of said volumetric air machine.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |