AIR-FUEL RATIO CONTROLLER

摘要

PURPOSE:To perform fine exhaust gas control by controlling the air-fuel ratio through comparison between a converted value of output voltage from O2 sensor and a setting level corresponding with the optimal air/fuel ratio point. CONSTITUTION:O2 sensor 10 is connected through an amplifier 20 with a comparator 30 to be fed with a first setting level (a). A function generator 40 will convert the rectangular waveform produced from the comparator 30 into such waveform as having some inclination on the basis of rising/falling of said reactangular waveform. The comparator 50 is provided with a second setting level (b). Proportional/integrating portion generator 60 is connected with an air-fuel ratio control device 70. Consequently, fine exhaust gas control is achieved.