Variable-cycle engine

Details Variable-cycle engine Variable-cycle engine

1990-12-12

1992-05-19

Cross, E. Rollins

Internal-combustion engines

Convertible cycle

1231885, F02B 6900

Patent

active

051138050

ABSTRACT:
A variable-cycle engine selectively operable in different cycle modes, includes a cylinder having a first intake port and an exhaust port which are defined in an upper portion thereof, and a second intake port defined in a lower portion thereof, a cylinder sleeve fitted in the cylinder and having a third intake port defined in a lower portion thereof, a sleeve valve circumferentially rotatably fitted over the cylinder sleeve, for selectively opening and closing the third intake port into and out of communication with the second intake port, the sleeve valve having an permanent magnet joined thereto, an actuator for rotating the sleeve valve under electromagnetic forces acting on the permanent magnet, and a turbocharger for supplying air under pressure to the first intake port and the second intake port. When the engine rotates at a low speed under a large load, the engine operates in a two-cycle mode of the uniform flow type. When the engine rotates at a high speed or at low speed under a small load, the engine operates in a four-cycle engine.

REFERENCES:
patent: 1077363 (1913-11-01), Nash
patent: 1274777 (1918-08-01), Prescott
patent: 5005539 (1991-04-01), Kawamura
patent: 5007382 (1991-04-01), Kawamura
patent: 5022353 (1991-06-01), Kamamura

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