US Patent Issued to TOYOTA JIDOSHA on June 24 for "Leak diagnosis device of fuel vapor treatment apparatus" (Japanese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,197, issued on June 24, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Leak diagnosis device of fuel vapor treatment apparatus" was invented by Yuusaku Nishimura (Toyota, Japan), Keita Fukui (Fujinomiya, Japan) and Hideki Miyahara (Miyoshi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A leak diagnosis device for a fuel vapor treatment apparatus, comprising: a first diagnosis unit that performs a leak diagnosis of a fuel tank based on a tank internal pressure in a closed state of a sealing valve; a determination unit that opens a sealing valve in a state where a purge valve and a switching valve are closed when the tank internal pressu...