ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,405,120, issued on Sept. 2, was assigned to HYUNDAI MOTOR COMPANY (Seoul, South Korea) and KIA Corp. (Seoul, South Korea).
"Device and method for improving fuel efficiency of fuel cell vehicle in uphill and downhill driving" was invented by Ki Chang Kim (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a device and a method for improving the fuel efficiency of a fuel cell vehicle in uphill and downhill driving. The device may calculate an appropriate stack output to be generated from a fuel cell stack based on the SOC of a battery as well as an uphill altitude at which the vehicle traveling on the uphill road has to travel...