Controller of internal combustion engine

Abstract

A controller of an internal combustion engine retards the ignition timing by a soot suppression necessary retard amount IGCR as a retard amount for suppressing the soot generation amount in exhaust gas, from an optimal ignition timing IGMBT, according to a detected operation state, e.g., engine water temperature TW, charging efficiency ETAC, engine speed NE, of an internal combustion engine 3. A controller of an internal combustion engine of a second invention retards an ignition timing IGLOG to suppress the soot generation amount in exhaust gas, according to an operation state of the internal combustion engine 3, in a normally aspirated operation state where the charging efficiency ETAC is not higher than 100%, and in a turbocharged operation state.

Dependencies are inferred from the claim text.