Deere + Company

Nam Hyo Cho

Michael J Maney

Dustin W Ridenour

Bryan T Geisick

Ankit Y Patel

Amandeep Sharma

Nagesh Choudhary

Changdeo D Gaikwad

James M Krasselt

A piston for an internal combustion engine includes a piston bowl. The piston bowl has a half section profile that includes a bowl entry extending radially from the longitudinal piston center axis, a first bowl recess extending radially from the bowl entry and defining a bowl depth and a first radius of curvature, a second bowl recess extending radially from a first bowl recess to an end perimeter surface and defining a second radius of curvature, a bowl lip defined by the first bowl recess and the second bowl recess, and a bowl edge defined by the second bowl recess and the end perimeter surface. The first bowl recess further defines a first bowl recess exit angle at the bowl lip. The second bowl recess further defines a second bowl recess exit angle at the bowl edge.

Internal combustion engine and piston having piston bowl

A piston includes a piston body having an outer cylindrical surface and defined along a longitudinal piston center axis. The piston further includes a piston bowl with a half section profile with a bowl entry extending radially from the longitudinal piston center axis; a bowl recess extending radially from the bowl entry; and a soot shelf extending from the bowl recess to define a soot shelf axial height (H) and a soot shelf radial width (W). The soot shelf includes an inner step being formed by an inner step base surface extending radially from the bowl recess; an outer step being formed by a step shoulder surface extending axially from the inner step base surface and an outer step base surface extending radially from the step shoulder surface; and a soot shelf shoulder surface extending axially from outer step base surface to the end perimeter surface.

Piston with soot reducing piston bowl

Growing community of inventors

Cedar Falls, IA, United States of America

Nam Hyo Cho