Method for reducing the particle emissions of a spark-ignition internal combustion engine with direct injection, and internal combustion engine for carrying out such a method

摘要

A method for reducing the particle emissions of a spark-ignition, direct-injection internal combustion engine is provided. The method comprises operating at least one cylinder superstoichiometrically, responsive to an injector coking level and sufficiently high cylinder temperature, for a duration to increase oxidation of coking residues.

主权项

1. A method of operating a direct-injected, spark-ignited engine, comprising:
direct-injecting gasoline to an engine cylinder; spark-igniting the injected gasoline; responsive to an injector coking level and sufficiently high cylinder temperature, operating the at least one cylinder superstoichiometrically for a duration to increase oxidation of coking residues.