| 摘要 |
An apparatus of the invention controls the air-fuel ratio in response to the stable output of an oxygen sensor (37). When a system protector (138) detects a disorder in apower network (14), it outputs failure signal. A connection relay (135) is opened in response to the failure signal to release connection of a generator to the power network (14) to release load. When the failure signal is not detected, a load determination section (41) urges a proportional valve controller (40) and the controller (40) drives a valve (35) corresponding to the oxygen density to perform a control of the air-fuelratio. The load determination section (41) determines that the load is released by the failure signal to send a notification of no load to the controller (40). The controller (40) stops the control of the air-fuel ratio based on the oxygen density in response to this notification. <IMAGE>
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