Abstract In the relative combination of an apex seal and a rotor housing in a rotary piston internal combustion engine, the apex seal made of a ferrous or nonferrous metal is provided with a sparyed layer of FE-O compound, which contains oxygen in the range from 15.0 to 30.05 wt.%, having the thickness of more than 0.1 mm at least on the sliding surface thereof and the rotor housing is provided with a cast-iron member of which graphite is precipitated on the surface thereof in the range from 1 to 15%, by area, based on the surface area of the cast-iron member at least on the sliding surface on which the apex is slided, whereby the wear and scuffing resistances of both sliding surfaces of the apex seal and the rotor housing are improved.
A RELATIVE COMBINATION OF AN APEX SEAL AND A ROTOR HOUSING IN A ROTARY PISTON INTERNAL COMBUSTION ENGINE WHEREIN SAID APEX SEAL IS MADE OF FERROUS OR NONFERROUS METAL AND IS PROVIDED WITH A SPRAYED LAYER OF FE-O COMPOUND, WHICH CONTAINS OXYGEN IN THE RANGE FROM 15.0 TO 30.05 WT.%, HAVING THE THICKNESS OF MORE THAN 0.1 MM AND SAID ROTOR HOUSING IS PROVIDED WITH A CAST-IRON MEMBER OF WHICH GRAPHITE IS PRECIPITATED ON THE SURFACE THEREOF IN THE RANGE FROM 1 TO 15%, BY AREA, BASED ON THE SURFACE AREA OF SAID CAST-IRON MEMBER, AT LEAST ON THE APEX SEAL SLIDING SURFACE OF SAID ROTOR HOUSING.
Claim 2
Dependent Claim
107 words
A RELATIVE COMBINATION OF AN APEX SEAL AND A ROTOR HOUSING IN A ROTARY PISTON INTERNAL COMBUSTION ENGINE WHEREIN SAID APEX SEAL IS MADE OF FERROUS OR NONFERROUS METAL AND IS PROVIDED WITH A SPRAYED LAYER OF FE-O COMPOUND, WHICH CONTAINS OXYGEN IN THE RANGE FROM 15.0 TO 30.05 WT.%, HAVING THE THICKNESS OF MORE THAN 0.1 MM AND SAID ROTOR HOUSING IS PROVIDED WITH A CAST-IRON MEMBER OF WHICH GRAPHITE IS PRECIPITATED ON THE SURFACE THEREOF IN THE RANGE FROM 1 TO 15%, BY AREA, BASED ON THE SURFACE AREA OF SAID CAST-IRON MEMBER, AT LEAST ON THE APEX SEAL SLIDING SURFACE OF SAID ROTOR HOUSING.