A managed fuel air mode control system is provided which operates in an open loop lean mode of operation whenever open loop enable criteria is met. During the open loop lean mode of operation, a rich A/F purge mode of operation is dictated when a NO.sub.x trap is determined to be full. After purging...http://www.google.fr/patents/US5778666?utm_source=gb-gplus-shareBrevet US5778666 - Method and apparatus for improving engine fuel economy
Method and apparatus for improving engine fuel economy
