Method and apparatus for filtering solid particulate matter from

Method and apparatus for functional monitoring of a catalytic co

Method and apparatus for heating a catalytic converter to reduce

Method and apparatus for heating a catalytic converter upon cold

Method and apparatus for improved operation of internal combusti

Method and apparatus for improving engine fuel economy

Method and apparatus for injecting hydrogen into a catalytic con

Method and apparatus for judging the functioning of a catalytic

Method and apparatus for lambda control

Method and apparatus for maintaining catalyst efficiency of a NO

Method and apparatus for maintaining catalyst efficiency of a NO

Method and apparatus for measuring lean-burn engine emissions

Method and apparatus for metering the introduction of a reducing

Method and apparatus for monitoring a catalytic converter

Method and apparatus for monitoring and adjusting .lambda.-probe

Method and apparatus for monitoring deterioration of internal co

Method and apparatus for monitoring the conversion ratio of a ca

Method and apparatus for monitoring the function of a catalytic

Method and apparatus for monitoring the functioning of a catalyt

Method and apparatus for monitoring the starting behavior of a c