18243261. VEHICLE KEY-OFF LOAD MONITORING (Ford Global Technologies, LLC)
VEHICLE KEY-OFF LOAD MONITORING
Organization Name
Inventor(s)
Reagan P. Zimmerman of Bloomfield Hills MI (US)
Craig E. Esler of Plymouth MI (US)
Shormin Razzaq Chowdhury of Northville MI (US)
VEHICLE KEY-OFF LOAD MONITORING
This abstract first appeared for US patent application 18243261 titled 'VEHICLE KEY-OFF LOAD MONITORING
Original Abstract Submitted
Current limits are set for detecting anomalous current drain of a battery in an electrical system during a Key-Off state of a vehicle. A plurality of test vehicles are selected which are operational without any anomalous current drain. A plurality of time intervals are identified according to a plurality of predetermined Key-Off-Load (KOL) modes which are activated successively after initiation of the Key-Off state. Key-Off interval currents are measured during each of the time intervals in each of the test vehicles. A respective average current of the interval currents is determined in each respective time interval. A respective standard-deviation current of the interval currents is determined in each respective time interval. A respective current limit is set corresponding to each time interval according to the respective average current plus a respective incremental value determined according to the respective standard-deviation current.
