US2247299A - Two-cylinder two-stroke engine - Google Patents

Two-cylinder two-stroke engine Download PDF

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Publication number
US2247299A
US2247299A US254461A US25446139A US2247299A US 2247299 A US2247299 A US 2247299A US 254461 A US254461 A US 254461A US 25446139 A US25446139 A US 25446139A US 2247299 A US2247299 A US 2247299A
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United States
Prior art keywords
cylinder
valve
stroke engine
fuel
throttle
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Expired - Lifetime
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US254461A
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Klavik Milos
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Individual
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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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings
    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
    • F02B25/18—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke the charge flowing upward essentially along cylinder wall adjacent the inlet ports, e.g. by means of deflection rib on piston
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two

Description

Julie 24, 1941. M, KLAVIK 2,247,299
TWO CYLINDER TWO STROKE ENGINE Filed Feb. 3, 1939 Patented June 24, 1941 TWD-CYLINDER TWO-STROKE ENGINE Miloi Klavilr, Prague-Smicho'v, Czechoslovakia Application February 3, 1939, Serial No. 254,461 In Czechoslovakia January 17, 1938 2 Claims.
This invention relates to an arrangement of two-cylinder two-stroke engines for runnin light, particularly engines for aviation purposes. Small two-stroke two-cylinder engines are frequently used in' aviation. When the supply of fuel is diminished for running light, such engines have the unpleasant property that they often miss-fire and brake the propeller or cause it to spring back, which may result in a sudden drop in the flying speed and lead to accidents.
According to the invention, this disadvantage is obviated by rendering one of the cylinders of the engine entirely inoperative on throttling the supply of fuel for running light, so that only the second cylinder works with the full charge for ensuring satisfactory running. For this purpose, the throttle valve of the engine is connected positively to the-operating mechanism of an auxiliary valve mounted in the supply conduit of the cylinder which is to be disconnected, and to the decompressor valve of said cylinder.
This arrangement is shown diagrammatically in the accompanying drawing.
The main throttle valve I of the two-cylinder engine is connected positively with a closure valve 2 in the supply conduit of one of the two cylinders and to the decompressor valve 3 of said cylinder, the connection being effected by connecting said members to a common actuating member, ior example a pull rod 4, by means of a pivoted lever 5 and a flexible cable 6, I, 8. The connection is made so that only from a predetermined position of the main throttle i, the closure valve 2 and the decompressor valve 3 are also simultaneously operated until in the position corresponding to running light, said closure valve is completely closed and the decompressor valve is open. The other cylinder thus receives the full charge of fuel so that it runs without missing.
I claim,
1. In a two-stroke two-cylinder engine, a main throttle, a valve for closing the supply of fuel to one cylinder, at decompression valve for the same cylinder and a push rod and lever operatively connected together, a cable connected to the supply valve and decompression valve and to one end of the lever and a cable connected from the other end of the lever to the throttle,
the action of the push rod and first-mentioned cable on the supply valve and decompression valve only commencing at a predetermined position of the throttle.
2. In a two-stroke two-cylinder engine, a throttle valve for controlling the supply of fuel jointly to both cylinders, a fuel valve for closing the suppy of fuel to one only of the cylinders, a decompression valve for the same cylinder, means for effecting operation of said throttle valve to vary its position through a predetermined range without effecting operation of said second valve, and means cooperative with said throttle valve operating means for closing said second valve and opening said decompression valve when said throttle valve has reached a predetermined position.
mnos KnAviK.
US254461A 1938-01-17 1939-02-03 Two-cylinder two-stroke engine Expired - Lifetime US2247299A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS2247299X 1938-01-17

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US2247299A true US2247299A (en) 1941-06-24

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US254461A Expired - Lifetime US2247299A (en) 1938-01-17 1939-02-03 Two-cylinder two-stroke engine

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675789A (en) * 1954-04-20 Internal-combustion engine
US4064861A (en) * 1976-08-10 1977-12-27 Schulz William J Dual displacement engine
US4607598A (en) * 1983-12-15 1986-08-26 Kioritz Corporation Suction device for two-cylinder internal combustion engine
US4768494A (en) * 1987-09-09 1988-09-06 Brunswick Corporation Idling system for multi-cylinder two-stroke engine
US5331925A (en) * 1993-01-04 1994-07-26 Mikhail Tsepenyuk Internal combustion engine
US5862781A (en) * 1994-12-18 1999-01-26 Rossle; Gottfried Two-stroke internal combustion engine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675789A (en) * 1954-04-20 Internal-combustion engine
US4064861A (en) * 1976-08-10 1977-12-27 Schulz William J Dual displacement engine
US4607598A (en) * 1983-12-15 1986-08-26 Kioritz Corporation Suction device for two-cylinder internal combustion engine
US4768494A (en) * 1987-09-09 1988-09-06 Brunswick Corporation Idling system for multi-cylinder two-stroke engine
US5331925A (en) * 1993-01-04 1994-07-26 Mikhail Tsepenyuk Internal combustion engine
US5862781A (en) * 1994-12-18 1999-01-26 Rossle; Gottfried Two-stroke internal combustion engine

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