Combustion control of an internal combustion engine

Curves (A,A') show the pressure and energy release against crankshaft angle for a diesel/air/recirculated exhaust fuel mixture which has about 70% exhaust gas. If a smaller proportion (60%) of recirculated exhaust gas is used and 1-8 cubic mm of fuel is injected at about 15 degrees before top dead center the slow oxidation period is extended (OL2) and the pressure and energy curves (B,B') are almost identical to the previous results. An Independent claim is also included for equipment to control auto ignition by fuel injection during slow oxidation phase.