ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,228,471, issued on Feb. 18, was assigned to Caterpillar Motoren GmbH & Co. KG (Kiel, Germany).
"NOx sensor monitoring" was invented by Eike Sixel (Kiel, Germany), Andreas Banck (Altenholz, Germany) and Hauke Holst (Danischenhagen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention pertains to a system for monitoring measured NOx values in an exhaust component, comprising a first NOx sensor having a first predetermined maintenance interval and a second NOx sensor having a second predetermined maintenance interval. The first and second NOx sensors are configured such that their first and second maintenance intervals are staggered...