F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
F01C20/00—Control of, monitoring of, or safety arrangements for, machines or engines
F01C20/18—Control of, monitoring of, or safety arrangements for, machines or engines characterised by varying the volume of the working chamber
F01C20/22—Control of, monitoring of, or safety arrangements for, machines or engines characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members