US Patent Issued to NISSAN MOTOR on Oct. 14 for "Method and device for controlling stopping of engine" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,344, issued on Oct. 14, was assigned to NISSAN MOTOR Co. LTD. (Yokohama, Japan).

"Method and device for controlling stopping of engine" was invented by Tomohiro Sakata (Kanagawa, Japan) and Seiji Hashimoto (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "In response to an engine temporary stop request, a quantity of oxygen stored in a catalytic converter is reduced by controlling an in-cylinder air fuel ratio to be richer than stoichiometric. The quantity of stored oxygen is calculated while the engine is operating. An amount of air fuel ratio enrichment is set based on the quantity of stored oxygen calculated when the stop request oc...