US1897674A - Direct acting internal combustion air compressor - Google Patents

Direct acting internal combustion air compressor Download PDF

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Publication number
US1897674A
US1897674A US476110A US47611030A US1897674A US 1897674 A US1897674 A US 1897674A US 476110 A US476110 A US 476110A US 47611030 A US47611030 A US 47611030A US 1897674 A US1897674 A US 1897674A
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air
internal combustion
direct acting
combustion air
pistons
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US476110A
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Pescara Raul Pateras
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

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  • the invention is relative to a scavenging process for two-stroke motor-compressors of the type having interconnected but otherwise free pistons movable in opposite diretrons.
  • the principal object of my invention is to simplify the construction of the machines 0 the type indicated by eliminating some of the accessory elements which serve to compress the scavenging air.
  • the first part only of each working stroke in the actual compressor cylinder or cylinders is ⁇ llllllZQLl for the compression of the air intended for scavenging, which scavenging air is compressed into a reservoir for the purpose.
  • the scavenging air passes through openings disposed in the walls of the cylinders into a tank or reservoir, which openings are disposed in such wise that they are covered by the compressor pistons as soon as the quantity of air necessary for scavenging is compressed into the tank.
  • the invention consists in addition of rertain other structures hereinafter pointed out.
  • the invention likewise includes all embodiments thereof and in general all machines corresponding to the said structures as well as their special elements necessitated thereby.
  • the motor includes two free pistons 1 and 2, movable in a motor cylinder 3 and in the compressor cylinders 4 and 5 in opposite directions.
  • the two pistons are connected together by means of a synchronizing device consisting of links (3 connected to an oscillating lever 8 adapted to describe an angle of less than 180 about a shaft 7.
  • the piston 2 controls at one of the extremities of the motor cylinder the exhaust ports 9 and the piston 1 at the other extremity controls the admission ports 10.
  • the free pistons 1 and 2 carry on the compressor side the admission valves 11 and they push back the air compressed in the compressor cylinders 1 and 5 which leaves by the orifices 12 through the check valves 13 and passes into the scavenging air tank 14: and leaves by the check valves pressed air tank through conduit 16.
  • the cushions of residual compressed air which remain in the two compressor cylinders 4 and 5 send the pistons back to their inner dead point. Scavenging takes place through scavenging orifices 10 which are opened to allow the scavenging air to flow from tank 14 into the motor cylinder 3 through the conduit 17 and fills the said cylinder with fresh air, which blows the burned gases out through the exhaust orifices 9 into the exhaust pipe 18.
  • the pistons 1 and 2 determine a pressure in the compressed air tank 14 which is contiguous with the cylinder.
  • the pistons 1 and 2 compress by separating from each other, and consequently during the power stroke, the air in the compressor cylinders 4 and 5 is compressed and during the first part of the said stroke, part of the contents of the compressor cylinder is forced through the ports 12 and the check valves 1?) into the tank 14.
  • the openings 12 are disposed in such a way that when the pistons 1 and 2 cover them the pressure in the tank 11 is that necessary for scavenging.
  • the check valves 13 oppose the return of the air into the cylinder through conduit 12, said air remains therefore under pressure until the free piston 1 will have uncovered the opening 10, the scavenging air then escapes through the pipe 17 and the motor cylinder 3 and the pressure drops in the tank 11 until the free piston covers the scavenging orifices anew. After passing ports 12 during the power stroke, the compressed air is forced through the valve 15 to the conduits 16 to the reservoir for the cone ressed air.
  • ⁇ Vhat I claim and desire to secure by Letters Patent of the United States of America is 1.
  • a motor compressor of the type described a plurality of compressing cylinders, aoommon motor cylinder coaxially disposed 15 to the com- 1 the tor cylinder, the compressing cylinders h compressed air at the ends t ereof remote from the motor posiend of the power stroke, the exhaust openings being the other piston in the communication through the said conduit and inlets between the reservoir the motor cylinder being maintained closed by one of the pistons in the motor cylinder until it attains the position towards the end of the power stroke, the ex iaust openings being maintained closed by her piston in the motor cylinder until said other piston also attains a position towards the end rangement being such that compressing cylinders at the first part of the power stroke is driven through the interme diate outlets into the reservoir, after which the said intermediate outlets are closed by the urther movement ot the pistons, the comthe reservoir passing thererom into the motor cylinder to effect the

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Description

Feb. 14, 1933. Esc 1,897,674
DIRECT ACTING INTERNAL COMBUSTION AIR COMPRESSOR Filed Aug. 18, 1950 Patented Feb. 14, 1933 PATENT OFFICE RAUL PATERAS PESCARA, OF PARIS,
FRANCE DIRECT ACTING INTERNAL COMBUSTION AIR COMPRESSOR Application filed August 18, 1930, Serial No.476,110, and in Germany August 17, 1929.
The invention is relative to a scavenging process for two-stroke motor-compressors of the type having interconnected but otherwise free pistons movable in opposite diretrons.
The principal object of my invention is to simplify the construction of the machines 0 the type indicated by eliminating some of the accessory elements which serve to compress the scavenging air.
According to the the invention the first part only of each working stroke in the actual compressor cylinder or cylinders is \llllllZQLl for the compression of the air intended for scavenging, which scavenging air is compressed into a reservoir for the purpose. The scavenging air passes through openings disposed in the walls of the cylinders into a tank or reservoir, which openings are disposed in such wise that they are covered by the compressor pistons as soon as the quantity of air necessary for scavenging is compressed into the tank.
The invention consists in addition of rertain other structures hereinafter pointed out.
The invention likewise includes all embodiments thereof and in general all machines corresponding to the said structures as well as their special elements necessitated thereby.
In the accompanying drawing the single figure is a lengthwise section through a motor compressor of the two-cycle type having interconnected but other wise free pistons movable in opposite dire;tions and direct acting.
Referring to the drawing more in detail, the motor includes two free pistons 1 and 2, movable in a motor cylinder 3 and in the compressor cylinders 4 and 5 in opposite directions. The two pistons are connected together by means of a synchronizing device consisting of links (3 connected to an oscillating lever 8 adapted to describe an angle of less than 180 about a shaft 7. The piston 2 controls at one of the extremities of the motor cylinder the exhaust ports 9 and the piston 1 at the other extremity controls the admission ports 10.
The free pistons 1 and 2 carry on the compressor side the admission valves 11 and they push back the air compressed in the compressor cylinders 1 and 5 which leaves by the orifices 12 through the check valves 13 and passes into the scavenging air tank 14: and leaves by the check valves pressed air tank through conduit 16. The cushions of residual compressed air which remain in the two compressor cylinders 4 and 5 send the pistons back to their inner dead point. Scavenging takes place through scavenging orifices 10 which are opened to allow the scavenging air to flow from tank 14 into the motor cylinder 3 through the conduit 17 and fills the said cylinder with fresh air, which blows the burned gases out through the exhaust orifices 9 into the exhaust pipe 18.
The operation of the above described device is as follows By separating from their internal dead point as illustrated in the drawing, the pistons 1 and 2 determine a pressure in the compressed air tank 14 which is contiguous with the cylinder. The pistons 1 and 2 compress by separating from each other, and consequently during the power stroke, the air in the compressor cylinders 4 and 5 is compressed and during the first part of the said stroke, part of the contents of the compressor cylinder is forced through the ports 12 and the check valves 1?) into the tank 14. The openings 12 are disposed in such a way that when the pistons 1 and 2 cover them the pressure in the tank 11 is that necessary for scavenging. The check valves 13 oppose the return of the air into the cylinder through conduit 12, said air remains therefore under pressure until the free piston 1 will have uncovered the opening 10, the scavenging air then escapes through the pipe 17 and the motor cylinder 3 and the pressure drops in the tank 11 until the free piston covers the scavenging orifices anew. After passing ports 12 during the power stroke, the compressed air is forced through the valve 15 to the conduits 16 to the reservoir for the cone ressed air.
\Vhat I claim and desire to secure by Letters Patent of the United States of America is 1. In a motor compressor of the type described, a plurality of compressing cylinders, aoommon motor cylinder coaxially disposed 15 to the com- 1 the tor cylinder, the compressing cylinders h compressed air at the ends t ereof remote from the motor posiend of the power stroke, the exhaust openings being the other piston in the communication through the said conduit and inlets between the reservoir the motor cylinder being maintained closed by one of the pistons in the motor cylinder until it attains the position towards the end of the power stroke, the ex iaust openings being maintained closed by her piston in the motor cylinder until said other piston also attains a position towards the end rangement being such that compressing cylinders at the first part of the power stroke is driven through the interme diate outlets into the reservoir, after which the said intermediate outlets are closed by the urther movement ot the pistons, the comthe reservoir passing thererom into the motor cylinder to effect the scavenging of said cylinder when the pistons approach the ends of the power stroke, one of the said pistons uncovering the exhaust ports of the power stroke, the ar-.
In Witness whereof I RAUL PATE attix m RAS y signature.
PESCARA.
US476110A 1929-08-17 1930-08-18 Direct acting internal combustion air compressor Expired - Lifetime US1897674A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426309A (en) * 1943-07-23 1947-08-26 United Aircraft Corp Assembly of engine-and-compressor units
DE4410926A1 (en) * 1994-03-21 1996-07-04 Franz Wierlemann Computer-assisted 2-stroke free-piston type gas generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426309A (en) * 1943-07-23 1947-08-26 United Aircraft Corp Assembly of engine-and-compressor units
DE4410926A1 (en) * 1994-03-21 1996-07-04 Franz Wierlemann Computer-assisted 2-stroke free-piston type gas generator

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