Piston sleeve

Abstract

Abstract A PISTON CYLINDER, PARTICULARLY AN INTERNAL COMBUSTION ENGINE CYLINDER LINER SLEEVE, HAVING A BAND OF HARD-FACING METAL SUCH AS MOLYBDENUM, REFRACTORY METAL CARBIDE ALLOYS, PREFERABLY TUNGSTEN CARBIDE, OR THE LIKE EMBEDDED IN THE INNER SURFACE OF THE SLEEVE TO PROVIDE A CORROSION AND WEAR RESISTING BEARING FACE AROUND THE PISTON RINGS AT THE TOP END OF THE PISTON STROKE AND, IF DESIRED, ALSO AT THE BOTTOM END OF THE PISTON STROKE. THE HARD-FACING METAL BAND PREFERABLY SURROUNDS THE TOP RING OF THE PISTON AT THE TOP END OF THE PISTON STROKE. IF A HARD-FACING METAL BAND IS PROVIDED AT THE BOTTOM OF THE PISTON STROKE, IT IS LOCATED TO SURROUND THE BOTTOM OIL RING OF THE PISTON AT THE BOTTOM OF THE PISTON STROKE. THE BAND IS APPLIED BY A PLASMA ARC FLAME SPRAY AND HAS A TOTAL POROSITY LEVEL AND PORE SIZE RANGE ABLE TO RETAIN LUBRICANT WITHOUT RETAINING GRIT OF A SIZE WHICH WOULD DAMAGE THE SLEEVE OR PISTON RINGS.

Inventors

• 👤 Herbert F Prasse

Bibliographic Details