Gm Global Technolgoy Operations, Inc.

Gerald J Schimelfening

Andreas M Lippert

Alan William Hayman

Ko-Jen Wu

Scott E Parrish

Gerald Andrew Szekely, Jr

Mark Steven Huebler

William R Matthes

David L Reuss

Jennifer L Liedtke

Gerald A Silvas

Alexandros C Alkidas

A method and apparatus to operate a spray-guided spark-ignition direct fuel injection internal combustion engine are provided. The invention comprises injecting a first quantity of fuel during a combustion cycle. Spark ignition is initiated, and, injection of a second quantity of fuel is controlled effective to propagate a flame kernel generated by the spark ignition, after the initiation of the spark ignition during the combustion cycle.

Method and apparatus to control combustion in a spray-guided direct injection spark-ignited engine

A combustion chamber for a swirl flow two valve spark ignition direct injection engine includes a cylinder with a closed end having a wedge shaped combustion chamber recess. A fuel injector extends through the closed end near a shallow side of the wedge recess. A spark plug extends through the closed end at a deeper part of the wedge recess opposite from the injector. A single pair of laterally spaced intake and exhaust valves control intake and exhaust ports opening into the wedge recess. A piston in the cylinder has an outer diameter and includes a head end having a raised pedestal with a shallow upwardly angled face ending at a raised ridge and enclosing a shallow bowl in the head end. The bowl is generally oval with a major dimension generally aligned with a cylinder centerline through the valves.

Combustion chamber for swirl flow two valve spark ignition direct injection engine

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Shelby Township, MI, United States of America

Gerald J Schimelfening