Cylinder for an internal combustion engine

Claim 1

A CYLINDER FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A CYLINDER BODY, INSIDE SURFACE PORTIONS OF SAID BODY DEFINING A SUBSTANTIALLY CYLINDRICAL WORKING SPACE THEREIN, A CYLINDER HEAD CLOSING SAID WORKING SPACE AT ONE AXIAL END, FIRST PORTIONS OF SAID CYLINDER HEAD DEFINING A LATERAL SURFACE THEREOF DIRECTED OUTWARDLY, SECOND PORTIONS OF SAID CYLINDER HEAD DEFINING AN INSIDE SURFACE THEREOF BOUNDING SAID END OF SAID WORKING SPACE, THIRD PORTIONS OF SAID CYLINDER HEAD DEFINING AN INLET DUCT PORTION EXTENDING TOWARD SAID WORKING SPACE FROM SAID LATERAL SURFACE, FOURTH PORTIONS OF SAID CYLINDER HEAD DEFINING A VALVE CHAMBER TO WHICH LEADS SAID INLET DUCT, AND FIFTH PORTIONS OF SAID CYLINDER HEAD DEFINING AN ANNULAR VALVE SEAT AND A CIRCULAR VALVE PORT ENCIRCLED BY SAID VALVE SEAT, OPENING INTO SAID WORKING SPACE AT SAID INSIDE SURFACE, AND IN COMMUNICATION WITH SAID VALVE CHAMBER, SAID VALVE, SEAT AND SAID VALVE PORT BEING DISPOSED ECCENTRICALLY WITH RESPECT TO THE AXIS OF SAID WORKING SPACE, AND THE CYLINDER HAVING THE FOLLOWING FEATURES: MISH, SYMMETRICAL BODY TAPERING TOWARDS SAID WORKING SPACE, (B) WHEN VIEWED IN AN AXIAL DIRECTION OF SAID WORKING SPACE, THE CENTRE LINE OF SAID INLET DUCT PORTION IS OF BENT FORM AND A FIRST SURFACE PORTION OF SAID VALVE CHAMBER, WHICH SURFACE PORITON IS RADIALLY OUTER WITH RESPECT TO THE AXIS OF SAID WORKING SPACE, EXTENDS TANGENTIALLY OF THE INNER PERIPHERY OF SAID VALVE SEAT, (C) WHEN VIEWED IN A RADIAL DIRECTION OF SAID WORKING SPACE TRANSVERSELY OF SAID DUCT, THE CENTRE LINE OF SAID INLET DUCT PORTION IS APPROXIMATELY A STRAIGHT LINE AND EXTENDS AT AN ANGLE OF ABOUT 15* WITH RESPECT TO SAID INSIDE SURFACE, (D) WHEN VIEWED IN SAID AXIAL DIRECTION, THE WIDTH OF SAID INLET DUCT PORTION IN THE VICINITY OF SAID VALVE CHAMBER IS LESS THAN THE INTERNAL DIAMETER OF SAID VALVE SEAT, (E) SECOND AND THIRD SURFACE PORTIONS OF SAID VALVE CHAMBER, OF WHICH SAID SECOND SURFACE PORTION FACES SAID VALVE PORT AND SAID THIRD SURFACE PORTION IS DISPOSED OPPOSITE TO SAID SECOND SURFACE PORTION, EXTEND ARCUATELY FROM SAID INLET DUCT PORTION TO SAID VALVE PORT, MERGE WITH SURFACE PORTION OF SAID VALVE PORT, AND BECOME INCREASINGLY SPACED APART AS THEY APPROACH SAID VALVE PORT, (F) SECTIONS TAKEN THROUGH SAID VALVE CHAMBER AND ON PLANES PASSING THROUHG A COMMON POINT IN THE REGION OF THE CENTRE OF AN ARC OF SAID THIRD SURFACE PORTION AND CONTAINING LINES WHICH EXTEND PERPENDICULALRY TO THE CENTRE LINE OF SAID VALVE CHAMBER AND PARALLELLY TO SAID INSIDE SURFACE, HAVE APPROXIMATELY ELLIPTICAL CONTOURS OF WHICH THE MAJOR AXES EXTEND SUBSTANTIALY PERPENDICULARLY TO THE WORKING SPACE AXIS, AND (G) WHEN VIEWED IN SAID AXIAL DIRECTION, A TANGENT TO THE CENTER LINE OF SAID INLET DUCT PORTION AT A FIRST LOCATION IN THE VICINITY OF SAID VALVE CHAMBER EXTENDS THROUGH A SECOND LOACTION BETWEEN THE INNER PERIPHERY OF SAID CYLINDER BODY AND THE AXIS OF SAID VALVE PORT.