In an electronic control unit (2) having two computers (4, 6), the first computer (4), which is an engine control microcomputer, performs multiple diagnoses (S100-S130, S140-S170) and sends data regarding the diagnoses (S100-S130, S140-S170) to the second ...

An internal combustion engine, comprising: a combustion condition switching section for switching a combustion condition of the engine into a stratified lean air-fuel m ixture ratio charge combustion, a homogeneous lean air-fuel mixture charge combustion, ...