The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2021
Filed:
Jul. 26, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
Bryan D. Axe, Farmington Hills, MI (US);
Gaetano Di Venti, Enna, IT;
Francesco Cannarile, Turin, IT;
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A vehicle particulate matter contamination recovery system includes a particulate matter filter receiving exhaust gas from an engine. A particulate matter sensor is positioned downstream of the particulate matter filter, the particulate matter sensor collecting a non-combustible contaminant on a circuit of the particulate matter sensor and generating a current indicating presence of the non-combustible contaminant. A total volume of water collected during multiple cold start operations of the engine is passed onto the sensor acting to at least partially dissolve the non-combustible contaminant. The particulate matter sensor is operated in a remedial action mode of operation having no voltage applied to the circuit of the particulate matter sensor until a quantity of the cold start operations corresponding to the total volume of water is reached.