2-4 Cycle change-over engine and its control system

Internal-combustion engines – Convertible cycle

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Details

123 9011, F02B 6906

Patent

active

051934922

ABSTRACT:
The present invention lies in a 2-4 cycle change-over engine and its control unit which perform 2 cycle running of the uniflow type by closing a suction valve at an upper portion of the engine and working a valve (a rotational sleeve) at a lower portion of a cylinder when the engine rotates in a lower number of revolution than a predetermined number of revolution and a load is larger than a predetermined value, and perform change-over into 4-cycle running by always closing a scavenging port at a lower portion of the cylinder by means of the valve (the rotational sleeve) at the lower portion of the cylinder and working the suction valve at the upper portion of the cylinder when a higher revolution than a predetermined number of revolution is given and an engine load is lighter than a predetermined load.

REFERENCES:
patent: 1817919 (1991-08-01), Highley
patent: 2810373 (1957-10-01), Lang
patent: 3533429 (1970-10-01), Shoulders
patent: 4635590 (1987-01-01), Gerace
patent: 5005539 (1991-04-01), Kawamura
patent: 5007382 (1991-04-01), Kawamura
patent: 5022353 (1991-06-01), Kamamura
patent: 5069422 (1991-12-01), Kawamura
Abstract of JP-A-60 088 810, Patent Abstracts of Japan, vol. 9, No. 231 (M-414) (1954), Sep. 18, 1985.

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