Control apparatus for internal combustion engines.

摘要

An internal combustion engine control apparatus has a digital arithmetic unit (9) to which signals are inputted from a plurality of detectors (7,8) such as detectors for detecting an operational state of the engine (6) and air fuel ratio detector and controls a fuel air ratio and ignition timing according to output signals from the arithmetic unit (9). The apparatus comprises by a misfire detector (7) for detecting a misfiring state of the engine, NOx concentration detector (8) and a controller (27) for controlling the fuel air ratio and the ignition timing so as to fall within a tolerable stable combustion range defined by a detected misfire boundary and a detected NOx limit. The misfiring state and/or NOx concentration can be detected through detection of temperature change in the combustion chamber (23) by a detector (110). The detector (110) comprises a black body (112) disposed in the combustion chamber (23) and a fused silica cable (111) mounting the black body (112).