| 摘要 |
An air-fuel ratio correction coefficient calculating component is provided to an air-fuel ratio controller for an engine having the wide range air-fuel ratio sensor. The air-fuel ratio correction coefficient calculating component can cope with a time lag in detection of an air-fuel ratio detected by the wide range air-fuel ratio sensor from the time when a mixed gas of the air-fuel ratio is supplied to the engine. In order to attain the above object, an air-fuel ratio controller for an engine in accordance with the present invention is characterized by comprising a wide range air-fuel ratio sensor for outputting a signal corresponding to an air-fuel ratio of an exhaust gas; and a component for calculating an air-fuel ratio correction coefficient to control an amount of fuel supplied to the engine based on an output signal of the air-fuel ratio sensor, wherein the air-fuel ratio correction coefficient calculating component calculates the air-fuel ratio correction coefficient based on a non-linear calculation element. As a detailed feature, the non-linear calculation element has an ON-OFF characteristic, a neutral zone characteristic, a saturation characteristic or a characteristic combining a plurality of characteristics selected from the above-mentioned characteristics.
|
