METHODS AND SYSTEM FOR REDUCING PARTICULATE MATTER PRODUCED BY AN ENGINE

摘要

Methods and systems for simultaneously operating port fuel injectors and direct fuel injectors of an internal combustion engine are described. In one example, port fuel injection timing is adjusted to reduce particulate matter formation in the engine so that particulate filter loading may be reduced until a time when the particulate filter may be purged.

主权项

1. An engine fueling method, comprising:
injecting fuel to a cylinder of an engine via a controller, a port fuel injector, and a direct fuel injector, the injection of fuel based on a group of pre-customer delivery control parameters, a group of post-customer delivery control parameters, the pre-customer delivery control parameters increasing an amount of port fuel injected as compared to the post-customer delivery control parameters during similar engine operating conditions.