US3727399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-piston diesel engine superchargers
Assignee: SA De Vehicules Ind D Equipments Mecaniques Saviem fr
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Filing: 1971-03-08
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Granted: 1973-04-17
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Expires: 1991-03-08
Abstract
Abstract In a supercharging system for Diesel rotary-piston engines comprising a turbosupercharger and a volumetric supercharger, means are provided for drawing air downstream of the volumetric supercharger and utilizing this tapped air in an air pump also receiving the air having passed through the engine radiator, a needle valve responsive to the supercharging pressure controlling the delivery of drawn air into the neck of a convergent divergent section of said pump, this drawn air being also adapted to be injected into the exhaust pipe of the turbine of said turbosupercharger which receives the exhaust gas from the engine, said exhaust pipe being connected in turn to the interior of another pump mounted in the radiator cooling air duct, a needle valve being inserted in the pipe delivering the air derived downstream of said volumetric supercharger, in order to improve the efficiency of the system by reducing the counter-pressure upstream of the exhaust turbine while improving the drawn air output and therefore the air-pump throughput and the engine radiator cooling air output, said needle valve being responsive to this end to a spring-loaded bellows responsive in turn to the supercharging pressure.
Inventors
- 👤 M Brille
- 👤 Y Baguelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:23
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/12; F02B37/16; F02B37/164; F01; F01P; F01P5/00; F01P5/02; F01P5/08; F02B37/04; F02B53/00; F02B53/04; F02B53/08; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
139 words
An improved control system for a supercharged rotary piston diesel engine comprising: a turbosupercharger driven by the engine exhaust gas having an output air discharge and having an exhaust pipe to remove the exhaust gas from the engine; a twin-rotor volumetric supercharger driven at a speed proportional to the engine speed; a conduit connecting the output air discharge from said turbosupercharger to said volumetric supercharger; an air-liquid heat exchanger in said conduit; means for circulating an engine cooling liquid through said heat exchanger and to a radiator; an outlet pipe conducting the supercharged air from the volumetric supercharger to the engine; a tapping pipe connected to said outlet pipe whereby a part of the supercharged air may be discharged; and means responsive to the pressure in said conduit from the turbosupercharger to control the discharge from said tapping pipe.
Claim 2
Dependent Claim
139 words
An improved control system for a supercharged rotary piston diesel engine comprising: a turbosupercharger driven by the engine exhaust gas having an output air discharge and having an exhaust pipe to remove the exhaust gas from the engine; a twin-rotor volumetric supercharger driven at a speed proportional to the engine speed; a conduit connecting the output air discharge from said turbosupercharger to said volumetric supercharger; an air-liquid heat exchanger in said conduit; means for circulating an engine cooling liquid through said heat exchanger and to a radiator; an outlet pipe conducting the supercharged air from the volumetric supercharger to the engine; a tapping pipe connected to said outlet pipe whereby a part of the supercharged air may be discharged; and means responsive to the pressure in said conduit from the turbosupercharger to control the discharge from said tapping pipe.
Claim 3
Dependent Claim
16 words
A system according to claim 1 wherein said volumetric supercharger is of the internal-geared Planche type.
Claim 4
Dependent Claim
36 words
A system according to claim 2 wherein the slow rotor of the volumetric supercharger is carried by the shaft of the rotary piston of the engine and acts as a balancing weight to this rotary piston.
Claim 5
Dependent Claim
27 words
A system according to claim 1 wherein the supercharged air which is withdrawn through the tapping pipe is delivered to an air pump for cooling the radiator.
Claim 6
Dependent Claim
37 words
A system according to claim 4 wherein an air-gas heat exchanger is added to the exhaust pipe from the turbosupercharger to provide additional heat to the air in the tapping pipe being supplied to said air pump.
Claim 7
Dependent Claim
44 words
A system according to claim 1 wherein said tapping pipe is connected to the exhaust pipe of the turbosupercharger and means are provided for injecting the air in the tapping pipe into the exhaust pipe of said turbosupercharger whereby a first pump is formed.
Claim 8
Dependent Claim
20 words
A system according to claim 6 wherein the exhaust gas from the turbosupercharger is directed into a second induction pump.
Claim 9
Dependent Claim
52 words
A system according to claim 7 wherein said radiator is disposed upstream of a convergent section and of a neck surrounding said second pump which is supplied from a first pump via said exhaust pipe, said neck being followed by a divergent section in order to increase the cooling of said radiator.
Claim 10
Dependent Claim
29 words
A system according to claim 6 wherein an adjustable orifice is provided in the tapping pipe leading to said first pump for controlling the amount of air drawn therefrom.
Claim 11
Dependent Claim
66 words
A system according to claim 9 wherein said adjustable orifice comprises a needle valve having a tapered shape or a contour having a curvilinear generatrix is provided, said needle valve rigid with a rod being urged by a return spring to its seated position and responsive to a bellows connected to the conduit from said turbosupercharger such that the air pressure from the turbosupercharger is applied.
Claim 12
Dependent Claim
39 words
A system according to claim 6 wherein an air-gas heat exchanger is inserted in the exhaust pipe from the turbosupercharger in order to heat the air in the tapping pipe which is then connected to said first air pump.
Claim 13
Dependent Claim
21 words
A system according to claim 7 wherein at least the nozzles of said second pump are of the annular peripheric type.
Claim 14
Dependent Claim
39 words
A system according to claim 6 wherein said volumetric supercharger is of the rotary piston type with the rotary piston having n peripheral lobes of epicyclic contour revolving in a stator of conjugate contour comprising n + 1 lobes.
References Cited (Backward Citations)
US1636486A
Cited
US2845774A
Cited
US2877622A
Cited
US3141293A
Cited
US3142957A
Cited
US3355879A
Cited
US3358439A
Cited
US3405692A
Cited
US3595013A
Cited
US3483854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |