Caterpillar Inc.

Abram M Ingold

Ashwin Ashok Hattiangadi

Sanjay Kumar

Adam D Patrick

Rong Qu

Vasudev Koppram

Xuefeng Song

Fuel injector systems, methods, and assemblies can comprise an injector pushrod; a hold down clamp having an opening that can slidably receive the injector pushrod; a helper spring that can surround a first portion of the injector pushrod; a spacer that can surround a second portion of the injector pushrod and that can be positioned between the hold down clamp and a first end of the helper spring; and a retention seat that can retain a second end of the helper spring opposite the first end of the helper spring and that can surround a third portion of the injector pushrod.

Mechanically actuated fuel injector system, method, and assembly having helper spring

A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.

Valve seat insert with soft landing insert design with contoured radii

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. A sloping segment is oriented at an acute angle relative to the valve seat center axis, forming a venturi or a diffuser for gases entering or exiting the cylinder.

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Metamora, IL, United States of America

Abram M Ingold