.~ Piston in head adjusted manually or mechanically
Unofficial Alpha Subclasses: R A AA B C D
DEFINITION
Classification: 123/48
Internal-combustion engines having a cylinder and a working piston reciprocating therein, but irrespective of other structural features, cycle, or mode of operation, in which means are provided whereby the volume of the clearance-space or combustion-chamber may be varied or adjusted either manually or automatically as by a suitable governing device, to thereby insure a proper degree of compression of the combustible charge before ignition thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
311+, for internal-combustion engines in which the volume of the clearance-space is varied in unison with the exhaust-stroke, such action being a definite step in each cycle of operation of the engine.
