公开(公告)号：US20180142607A1

公开(公告)日：2018-05-24

申请号：US15355343

申请日：2016-11-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Arun S. Solomon ,  William F. SPRUIT ,  David P. Sczomak

IPC: F02B23/10 ,  F02F3/24 ,  F02F3/28 ,  F02B17/00

Abstract: A direct-injection stratified charge internal combustion engine includes a combustion cylinder to receive an air-fuel mixture, and an air intake port to inlet air into the combustion cylinder. The direct-injection engine also includes a fuel injector configured to deliver fuel within the cylinder in a spray pattern substantially aligned to a cylinder central axis to create the air-fuel mixture. A spark igniter is located within a path of the spray pattern to ignite combustion of the air-fuel mixture. The dire-injection engine further includes a movable piston defining a lower boundary of the combustion cylinder to contain the combustion of the air-fuel mixture. The piston is configured to include a bowl portion having local geometric features located on an intake port side of the combustion cylinder to redirect fluid flow towards a vortex in fluid communication with a combustion location near the cylinder central axis.