| 摘要 |
PURPOSE:To make the control of an air/fuel ratio always well by holding the temp. of an oxygen sensor with a heater to a predetermined value, by controlling power supplied to an electric heater corresponding to the sucking quantity of air and the number of rotations of an internal-combustion engine. CONSTITUTION:A microcomputer 50 is operated upon the reception of the supply of the current from a battery power source 17 and determines the fuel jet quantity per one cycle according to the output of a crank angle sensor 9 and that of a suction pipe pressure sensor 20 and further corrects the fuel jet quantity on the basis of the oxygen concn. of exhaust gas detected by an oxygen sensor 21 so as to bring the air/fuel ratio of the gaseous mixture supplied to a combustion chamber to the predetermined objective air/fuel ratio. The power supplied to the electric heater 28 of the oxygen sensor 21 is controlled corresponding to the sucking quantity of air and the number of rotations of an internal-combustion engine and, further, when fuel is cut at the time of speed reducton, power a predetermined amount larger than that determined according to the sucking quantity air and the number of rotations of the internal-combustion engine at that time is supplied to the electric heater 28. |
