Caterpillar Inc.

Karen E Snelling

Ashwin Ashok Hattiangadi

John Stephen Pipis, Jr

Rong Qu

Indrajith Kizhakkethara

Prabhu Nagaraj

Paul David Smallidge

Michael Joseph Motyl

Mallikarjuna Masala

Pay Broderson

A valve seat insert for a gas exchange valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming crowns to contact the gas exchange valve at different wear states. The valve seat insert further includes a base material, and a hard-facing material metallurgically bonded to the base material and forming the valve seating surface.

Double-crowned valve seat insert having seating surface formed of hard-facing material

A rocker base is disclosed for use with a valve actuation system. The rocker base may have a housing with a top, a bottom, side walls connecting the top to the bottom, and end walls disposed between the side walls. The rocker base may also have rocker arm supports located inside the housing and integrally formed with the side walls, and an injector spring pad extending from one of the end walls toward a center of the housing. The rocker base may further have a rib connecting the injector spring pad to one of the rocker arm supports.

Rocker base for valve actuation system

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Battle Ground, IN, United States of America

Karen E Snelling