ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,656, issued on Nov. 3, was assigned to HD CONSTRUCTION EQUIPMENT Co. LTD. (Seongnam-si, South Korea).
"Dual SCR system and control method thereof" was invented by Jin Hwan Yu (Incheon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to an embodiment of the disclosure, there is provided a dual selective catalytic reduction (SCR) system including: a first SCR device provided downstream of an engine; a diesel particulate filter provided downstream of the first SCR device; a second SCR device provided downstream of the diesel particulate filter; and a controller including a first SCR efficiency determination unit to determine a first...