| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of actuating exhaust-gas lambda in an exhaust gas canal of a dilution-operated internal combustion engine, and a controller therefor. <P>SOLUTION: An exhaust-gas lambdasonde includes a first electrode disposed in a gas measurement chamber connected to the exhaust gas canal and a second electrode disposed in a reference gas canal equipped with an oxygen reservoir. The second electrode is connected to the first electrode through an oxygen ion-conductive solid electrolyte. After introducing internal combustion engine operation in an excessively concentrated state, the effectiveness of a lambda signal is evaluated in a first time interval. After a lapse of a first time period, a pump current flowing through the two electrodes is reversed only for a second time period. After a lapse of the second time period, the direction of the pump current is restored to its original state to revaluate whether the lambda signal is effective. An oxygen filling level in the reference canal is calculated by integration from an oxygen ion pump current. <P>COPYRIGHT: (C)2011,JPO&INPIT |
