US1660610A - Superfeed system for two-stroke internal-combustion engines - Google Patents

Superfeed system for two-stroke internal-combustion engines Download PDF

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Publication number
US1660610A
US1660610A US161215A US16121527A US1660610A US 1660610 A US1660610 A US 1660610A US 161215 A US161215 A US 161215A US 16121527 A US16121527 A US 16121527A US 1660610 A US1660610 A US 1660610A
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superfeed
combustion engines
stroke internal
compressor
pressure
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US161215A
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Fornaca Guido
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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
    • F02B75/00—Other engines
    • F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
    • F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/4392—Conduits, manifolds, as far as heating and cooling if not concerned; Arrangements for removing condensed fuel

Definitions

  • GUIDO FOBNACA, F TURIN, ITALY GUIDO FOBNACA, F TURIN, ITALY.
  • the automatic valve isso adjusted that if the Carburettor valye is quickly closed while the engine is still running at the highest speed, it will open, owing to the exceptional fall of pressure produced, to admit air into the conduit, thus re-establishing at the inlet y Aports the lowest pressure necessary to lprevent back tiring. As the engine ⁇ .speed decreases, the automatic valve will close and the engine will continue'to workfat a lowery speed.
  • crank shafts 3, 8 that are connected, by means of rods 4, 4 with the pistons 5, 5.
  • the cylinders 1 are provided with exhaust ports 6 and with inlet ports 7.
  • the inlet ports are fed through the tube 8 from a conipressor 9 that draws the mixture from the' fore the butterfly valve 12 is suddenly closed, ,i

Description

Feb. 28, 1928. 1,660,610
G. FoRNAcA SUPERFEED SYSTEM FOR Two-STROKE TcNTERNAL COMBUSTION ENGINES Filed Jan, 14- 1927 Patented Feb. 28, 1928.
y1,660,610y I PATENT OFFICE.
GUIDO FOBNACA, F TURIN, ITALY.
SUPERFEED SYSTEM FOR TWO-STROKE INTERNAL-COMBUSTION ENGINES.
Application led January 14,1927, Serial No. 161,215, and in Italy January 20, 1926.
The two stroke engi-nes of the kind that are super-fed by means of a compressor arranged between the Carburettor and the cylinders showv theY great inconvenience that when changing suddenly from high to low speed, an instantaneous fall 0f pressure takes place between the Carburettor yvalve and the compressor and` consequently, between the compressor and` the cylinders. rlhis causes dangerous back firing in tliefeed tubes or l conduits. A f n Said inconvenience, which takes'place especially. in engines in which the closure of the inlet ports is retarded with respect to the exhaust poi-ts, is fully rcinoved'by the arrangement according to the present 1nveiition, which is substantially characterized by the interpostion of an automatic vValve between the usual Carburettor valvel and the` compressor.
The automatic valve isso adjusted that if the Carburettor valye is quickly closed while the engine is still running at the highest speed, it will open, owing to the exceptional fall of pressure produced, to admit air into the conduit, thus re-establishing at the inlet y Aports the lowest pressure necessary to lprevent back tiring. As the engine `.speed decreases, the automatic valve will close and the engine will continue'to workfat a lowery speed.
The annexed drawing shows, by "wayrof,l
example,- a diagriirrimatic form of construction of the arrangement applied to a two y stroke engine of the opposed piston type.I
crank shafts 3, 8 that are connected, by means of rods 4, 4 with the pistons 5, 5.
The cylinders 1 are provided with exhaust ports 6 and with inlet ports 7. The inlet ports are fed through the tube 8 from a conipressor 9 that draws the mixture from the' fore the butterfly valve 12 is suddenly closed, ,i
a strong `tall of pressure will take place in the conduit 1l and the feed pressure in the tube 8 `will be greatly decreased. This fall 'of pressure in the conduit l1 causes the valve- 13 toropeii and the air thus admitted brings the pressure to asuitable value, thus avoiding buck firing. Meanwhile, the speed of the engine is rapidly lowered, the compressor draws a smaller amount of mixture so that the valve 13 closes, and the feed is .effected at the ordinary reduced rate.
What I claim is:
In a\twostroke internal combustion engine the combination of an engine cylinder, a'v
compressor communicating therewith, a carburettor, a conduit connecting the latter with the compressor, a manually operated fuel control valve in the conduit, and a Valve V opening into the latter between the compressoi and said control valve operable automatically by a fall ofl pressure in the conduit `upon the sudden closing of the control valve,
thereby admitting air for preventing back ring.
my invention, I have si 'ed my name.
G O FORNACA.
In testimony that I claim the foregoing as
US161215A 1926-01-20 1927-01-14 Superfeed system for two-stroke internal-combustion engines Expired - Lifetime US1660610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1660610X 1926-01-20

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US1660610A true US1660610A (en) 1928-02-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977943A (en) * 1955-03-23 1961-04-04 Nordberg Manufacturing Co Supercharged opposed piston engines
US3071122A (en) * 1955-03-23 1963-01-01 Nordberg Manufacturing Co Supercharged opposed piston engine
WO2013058802A1 (en) * 2011-02-23 2013-04-25 Achates Power Inc. Two stroke, opposed-piston engines with engine braking
US8746190B2 (en) 2010-11-15 2014-06-10 Achates Power, Inc. Two stroke opposed-piston engines with compression release for engine braking

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977943A (en) * 1955-03-23 1961-04-04 Nordberg Manufacturing Co Supercharged opposed piston engines
US3071122A (en) * 1955-03-23 1963-01-01 Nordberg Manufacturing Co Supercharged opposed piston engine
US8746190B2 (en) 2010-11-15 2014-06-10 Achates Power, Inc. Two stroke opposed-piston engines with compression release for engine braking
WO2013058802A1 (en) * 2011-02-23 2013-04-25 Achates Power Inc. Two stroke, opposed-piston engines with engine braking
CN103392055A (en) * 2011-02-23 2013-11-13 阿凯提兹动力公司 Two-stroke, opposed-piston engines with engine braking
US8919304B2 (en) 2011-02-23 2014-12-30 Achates Power, Inc. Two stroke, opposed-piston engines with engine braking
US8997712B2 (en) 2011-02-23 2015-04-07 Achates Power, Inc. Two stroke, opposed-piston engine with engine braking
CN103392055B (en) * 2011-02-23 2016-08-10 阿凯提兹动力公司 The two stroke opposed-piston engines with engine braking

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