Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1987-07-07
1988-12-20
Argenbright, Tony M.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123257, 123281, F02B 7502, F02D 3904
Patent
active
RE0328022
ABSTRACT:
A two-cycle internal combustion engine having an "open" combustion chamber/poppet valve arrangement that produces improved scavenging. The combustion chamber has a generally oblate configuration and is slanted with respect to the cylinder axis in such a manner that the air flowing therein converges and is directed downward in a collimated column into the cylinder. The placement of overhead cam operated poppet valves in combination with the combustion chamber produces a scavenging method of the reverse return-flow type. A displacer piston having a displacer with a peripheral wall corresponding in configuration to that of the combustion chamber and defining a recess of predetermined volume that forms the floor of the combustion chamber when the piston is located in its upper most position may be advantageously employed. Variable valve timing is achieved by opening and closing the exhaust and inlet valves unsymmetrically in order to improve the scavenging efficiency and asymmetrically to cause an increase in the effective expansion ratio.
REFERENCES:
patent: 675796 (1901-06-01), Shcumm et al.
patent: 820285 (1906-05-01), Cross
patent: 1605000 (1926-11-01), Schneider
patent: 1613226 (1927-01-01), Held
patent: 1638288 (1927-08-01), Burtnett
patent: 1674014 (1923-09-01), Lawrence
patent: 1758429 (1930-05-01), Cory
patent: 2061157 (1936-11-01), Hurum
patent: 2097883 (1933-12-01), Johansson
patent: 2108365 (1938-02-01), Buchl
patent: 2131958 (1936-06-01), Kadenacy
patent: 2136070 (1938-11-01), Bokemuller
patent: 2159017 (1937-08-01), Duncan
patent: 2175463 (1939-10-01), Haring
patent: 2183674 (1936-09-01), Erren
patent: 2222134 (1940-11-01), Augustine
patent: 2242274 (1941-05-01), Thysse
patent: 2252914 (1939-09-01), Balton
patent: 2313017 (1943-03-01), Hurum
patent: 2542707 (1951-02-01), Ricardo et al.
patent: 2587339 (1952-02-01), du Rostu
patent: 2717583 (1955-09-01), Maybach et al.
patent: 2718882 (1955-09-01), Gerecke
patent: 2792818 (1957-05-01), Lindstrom
patent: 2804061 (1957-08-01), Gamble
patent: 2820339 (1958-01-01), Grieshaber et al.
patent: 2851023 (1958-09-01), Durkan
patent: 2858810 (1958-11-01), Hoffman
patent: 2958315 (1960-11-01), Williams
patent: 2977943 (1961-04-01), Lieberhard
patent: 3105470 (1963-10-01), Hockel et al.
patent: 3119229 (1964-01-01), Wolf
patent: 3196857 (1965-07-01), Zimmermann
patent: 3633554 (1972-01-01), Nakajima et al.
patent: 3730150 (1973-05-01), Codner, Jr.
patent: 3786792 (1974-01-01), Pellizzoni et al.
patent: 3796939 (1974-03-01), Raggi et al.
patent: 3817227 (1974-06-01), Onishi
patent: 3880126 (1975-04-01), Thurston
patent: 3897760 (1975-08-01), Hisserich
patent: 3911873 (1975-10-01), Dave
patent: 3915129 (1975-10-01), Rust et al.
patent: 3945221 (1976-03-01), Miokovic
patent: 3976038 (1976-08-01), Stahl
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4162662 (1979-07-01), Melchoir
patent: 4224905 (1980-09-01), von Seggern et al.
patent: 4543928 (1985-10-01), von Seggern
Schweitzer & Rosen, Uniflow vs. Loop Scavenging, Automotive Industries, (Jul. 1, 1953).
McGraw-Hill Scientific Dictionary (pp. 1105-1106), no date.
Argenbright Tony M.
Cummins Engine Company, Inc.
LandOfFree
Two-cycle engine with improved scavenging does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-cycle engine with improved scavenging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-cycle engine with improved scavenging will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902601