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:
Oct. 04, 2022
Filed:
Feb. 26, 2021
Tula Technology, Inc., San Jose, CA (US);
Cummins Inc., Columbus, IN (US);
Vijay Srinivasan, Farmington Hills, MI (US);
Louis J. Serrano, Los Gatos, CA (US);
Xiaoping Cai, Fremont, CA (US);
J. Steven Kolhouse, Columbus, IN (US);
Avra Brahma, Fishers, IN (US);
Adrian P. Dale, Columbus, IN (US);
Tula Technology, Inc., San Jose, CA (US);
Cummins, Inc., Columbus, IN (US);
Abstract
Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NO) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.