On-board catalyst health monitoring and control system adaptation in internal combustion engines

摘要

Various embodiments include systems adapted to monitor catalyst deterioration. Some embodiments include a catalyst deterioration detection system including a pre-catalytic converter gas sensor, a post-catalytic converter gas sensor, at least one computing device in communication with the pre-catalytic converter and post-catalytic converter gas sensors, the at least one computing device configured to monitor catalyst deterioration by performing actions including estimating a catalyst gas storage level by comparing a difference between a pre-catalytic converter gas level from the pre-catalytic converter gas sensor and a post-catalytic converter gas level from the post-catalytic converter gas sensor, comparing the estimated catalyst gas storage level to a baseline catalyst gas storage level and determining that the catalyst is deteriorated in response to the baseline catalyst gas storage level exceeding the estimated gas storage level by a threshold difference.

主权项

1. A catalyst deterioration detection system comprising:
a pre-catalytic converter gas sensor; a post-catalytic converter gas sensor; at least one computing device in communication with the pre-catalytic converter and post-catalytic converter gas sensors, the at least one computing device programmed to monitor catalyst deterioration by performing actions including:
estimating a catalyst gas storage level by comparing a difference between a pre-catalytic converter gas level from the pre-catalytic converter gas sensor and a post-catalytic converter gas level from the post-catalytic converter gas sensor;comparing the estimated catalyst gas storage level to a baseline catalyst gas storage level; anddetermining that the catalyst is deteriorated in response to the baseline catalyst gas storage level exceeding the estimated gas storage level by a threshold difference.