Caterpillar Inc.

Dongyao Wang

Ashwin Ashok Hattiangadi

Lee D Kress

John Robert Brubaker

Paul David Smallidge

James Dean Dunbar

Srikanth Reddy Boddapati

Uijal Paladhi

Abe Ingold

A damper and pulley assembly for an internal combustion engine is disclosed. The damper and pulley assembly, including a pulley closely fitted between two dampers, is configured to have increased air movement for heat dissipation while conforming to low spacing requirements of an engine compartment. The pulley can have multiple slots along its two side surfaces and openings located in the slots. The slots and openings of the pulley are aligned with openings of the two dampers, and facilitate air movement through the pulley and around the dampers.

Damper pulley design

A valve seat insert for a gas exchange valve such as an intake 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 wear crowns to contact the gas exchange valve at different wear states. The valve seat insert is further structured by way of the inner peripheral surface with an incoming flow crown, and a venturi extending from the incoming flow crown toward a throat of the valve seat insert. The venturi accelerates incoming gas flow.

Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession

Growing community of inventors

Rochester Hills, MI, United States of America

Dongyao Wang