Caterpillar Inc.
VALVE SEAT INSERT FOR HIGH POWER DENSITY AND HIGH SPEED DIESEL ENGINES

Abstract:

A valve seat insert of an engine has a valve seating surface including an outer curved segment forming a first wear crown for contacting the valve at an early wear state, an inner curved segment forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the outer and the inner curved segments.