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.