Patent ID: 7974770
Filing Date: 2011-07-05
Classification: F02D

Abstract:
1. An engine-controlling unit for an internal-combustion engine that has a first combustion-chamber group having a first catalytic exhaust-gas converter and that has a second combustion-chamber group having a second catalytic exhaust-gas converter, having a) a master control device that controls a combustion-air ratio in the case of the first combustion-chamber group of the internal-combustion engine, with the master control device forcibly exciting the first combustion-chamber group through alternate setting of a lean combustion-air ratio and a rich combustion-air ratio in the first combustion-chamber group, b) a slave control device that controls a combustion-air ratio in the case of the second combustion-chamber group of the internal-combustion engine, with the slave control device forcibly exciting the second combustion-chamber group through the alternate setting of a lean combustion-air ratio and a rich combustion-air ratio in the second combustion-chamber group, c) a data link between the master control device and slave control device, with the master control device controlling the slave control device over the data link, wherein d) the master control device is operable to transmit a synchronizing signal to the slave control device over the data link during changeover between the rich combustion-air ratio and lean combustion-air ratio within the scope of forced excitation, and wherein e) on receipt of the synchronizing signal from the master control device the slave control device is operable to change over within the scope of forced excitation between the rich and lean combustion-air ratio.