Skewed Combustion Chamber For Opposed-Piston Engines

摘要

A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.

主权项

1. A piston for an opposed-piston engine, comprising a flat end surface with an elongated, concave bowl formed therein to define a combustion chamber with an elongated bowl formed in a flat end surface of an opposing piston; the flat end surface meeting a piston sidewall at a peripheral edge having a circular shape that is centered on a longitudinal axis of the piston and that is disposed at a single longitudinal level of the piston; a pair of notches formed in the end surface and positioned in opposition on the peripheral edge, in alignment with an end surface diameter; the concave bowl having an oblong shape that is elongated along an end surface diameter, between the notches; the concave bowl being flanked on either side by flat end surface portions that extend to the peripheral edge; the concave bowl having opposing sidewalls and a curved bottom portion which connects the sidewalls smoothly in a vertical section; and, a maximum depth of the bowl being measured from a point of the bottom portion which is offset in an orthogonal direction from a plane PES which intersects the piston longitudinal axis and is positioned at the longitudinal level.