Method for acquiring geometric parameter of channel of catalytic bread of combustion engine of car, involves determining geometry of contour of section of channel, and deducing geometrical parameter from determined geometry of contour

摘要

The method involves cutting a catalytic bread (2) according to a cutting plane (P1) orthogonal to a longitudinal axis (A1) of channels. Images of cutting surfaces of the catalytic bread are acquired by an image sensor and processed in two automated operations by an automatic calculating unit. A geometry of a contour of a section of the selected channel in the cutting plane is determined during location operation by the calculating unit. A geometrical parameter is deduced from the determined geometry of the contour. An independent claim is also included for a method for estimating a heat-transferring surface of a catalytic bread in an exhaust line of an internal combustion engine of a car.