Engine cycle control system

Details Engine cycle control system Engine cycle control system

1990-05-11

1991-04-09

Okonsky, David A.

Internal-combustion engines

Convertible cycle

123 9011, 123DIG7, F02B 6906

Patent

active

050055399

ABSTRACT:
An engine cycle control system controls an engine so that it operates in a two-cycle mode when the rotational speed of the engine is lower than a predetermined speed and in a four-cycle mode when the rotational speed of the engine is higher than the predetermined speed. The engine controlled by the engine cycle control system has intake ports defined in a lower circumferential surface of a cylinder, an exhaust port defined in an upper portion of the cylinder and openable and closable at variable timing, and a fuel injection valve for injecting fuel into the cylinder at variable timing and in a variable quantity. Depending on the rotational speed of the engine, the timing of operation of an exhaust valve is varied to select the two-cycle mode or the four-cycle mode. The engine is associated with a turbocharger combined with an electric motor. In a large-load range in the two-cycle mode, the electric motor is energized to assist in turbocharging operation for thereby increasing the torque produced by the engine.

REFERENCES:
patent: 2304407 (1942-12-01), Hogan
patent: 4353334 (1982-10-01), Neitz
patent: 4392459 (1983-07-01), Chareire
patent: 4641613 (1987-02-01), Delesalle
patent: 4664070 (1987-05-01), Meistrick et al.
patent: 4907544 (1990-03-01), Burrahm

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