Caterpillar Inc.

Brandon Bowditch

David Andrew Pierpont

Adwait Vilas Joshi

Abhijitsinha Dilipsinha Pawar

Scott Ullrich

Kalyana Chakravarthy Vutukuri

A direct-injected compression ignition internal combustion engine includes an engine housing having a cylinder and a piston movable within the cylinder and including a piston end face forming a combustion bowl. The piston end face has an annular piston rim with a rounded inner rim surface that extends radially inward and axially downward from a planar outer rim surface to a combustion bowl edge. An antebowl is defined by the rounded inner rim surface and has an antebowl volume that is about 0.8% or greater of a total volume of the combustion bowl and the antebowl together. A configuration and dimensional attributes of the antebowl is associated with reduced smoke production during operation, particularly for low to mid-load transients.

Piston for compression-ignition engine having antebowl and engine operating strategy utilizing same

A polish analysis platform is disclosed. The polish analysis platform may receive a set of parameters for a proposed engine. The set of parameters may include: a quantity of hours of operation for the proposed engine, and a power output for the proposed engine. The polish analysis platform may determine an end of injection for the proposed engine based on the set of parameters. The polish analysis platform may generate a virtual instance of the proposed engine. The virtual instance may be configured with the end of injection. The polish analysis platform may simulate operation of the proposed engine using the virtual instance. Output of simulating the operation of the proposed engine may include a liner polish of a liner. The polish analysis platform may perform one or more manufacturing-related actions regarding the proposed engine based on the output of simulating the operation of the proposed engine.

Liner polish analysis platform

A piston for an engine may include a piston body. The piston body may include a piston crown disposed symmetrically about a central longitudinal axis of the piston. A combustion bowl may be recessed into the piston body and may be offset axially inwardly with respect to the piston crown. A central bowl apex may protrude axially from the combustion bowl and may be offset axially inwardly with respect to the piston crown. A first bowl apex may protrude axially from the combustion bowl and may be disposed radially inwardly with respect to the piston crown. A second bowl apex may protrude axially from the combustion bowl and may be disposed radially inwardly with respect to the first bowl apex and may be radially between the first bowl apex and the central bowl apex. The second bowl apex may be offset axially inwardly with respect to the central bowl apex.

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Lafayette, IN, United States of America

Brandon Bowditch