Cycle changeable engine

Details Cycle changeable engine Cycle changeable engine

1990-04-25

1991-04-16

Okonsky, David A.

Internal-combustion engines

Convertible cycle

123 9011, 123DIG7, F02B 6906, F01L 904

Patent

active

050073826

ABSTRACT:
This cycle changeable engine includes first intake valves for a four-cycle operation which are disposed in intake ports formed in a cylinder head, exhaust valves disposed in exhaust ports, second intake valves for a two-cycle operation, disposed in intake ports formed at the lower part of a cylinder, and an electromagnetic valve driving device for opening and closing each of the valves by electromagnetic force. The engine includes also a controller which actuates either the first or second intake valves for opening and closing with the others being kept closed in response to a detection signal from detection means for detecting the number of revolutions or load of the engine, and changes the operational condition of the engine to the two-cycle or four-cycle operation. In this manner the engine is operated in the two-cycle operation at a low speed revolution of the engine to improve an output torque and is operated in the four-cycle operation at a high speed revolution of the engine to reduce fuel consumption, to improve mean effective pressure and volume efficiency and to reduce noise.

REFERENCES:
patent: 2304407 (1942-12-01), Hogan
patent: 4312494 (1982-01-01), Aoyama
patent: 4392459 (1983-07-01), Chareire
patent: 4515343 (1985-05-01), Pischinger
patent: 4641613 (1987-02-01), Delesalle
patent: 4664070 (1987-05-01), Meistrick et al.
patent: 4838218 (1989-06-01), Sato et al.
patent: 4907544 (1990-03-01), Burrahm
Engine With Valve Timing Control Mechanism, vol. 9, No. 300, (M-433) (2023), (11/27/85); & JP-A-60 138 220, Fujitsu, K.K. (7/22/85).
Valve Made of Ceramics, vol. 12, No. 286 (M-727) (3133) (8/5/1988); & JP-A-63 705 (3/17/1988), NGK Spark Plug Co., LTD.

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