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AssigneeFord Global Technologies, LLC
InventorsDonatus Andreas Josephine KEES, Cayetano David Fuente SAN JUAN
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A method is disclosed for controlling the operation of a mild hybrid electric vehicle having an engine and high and low voltage power systems selectively connectable via a DC to DC converter. The method comprises whenever possible using only a low voltage battery forming part of the low voltage power system to power low voltage loads during an engine E-stop performed automatically to save fuel and reduce emissions and whenever possible using only a high voltage battery forming part of the high voltage power system to recharge the low voltage battery when the engine is restarted following the E-stop.
A method of controlling a mild hybrid electric vehicle comprising:
A mild hybrid electric vehicle having an engine driveably connected to an integrated starter-generator forming part of a high voltage power system that also includes a high voltage battery, a low voltage power system having a low voltage battery and at least one low voltage load, a DC to DC converter to selectively connect the high and low voltage systems together and an electronic controller to control operation of the engine, the high and low voltage power systems and the DC to DC converter wherein the electronic controller is operable to isolate the high voltage power system from the low voltage power system when the engine is automatically stopped in order to save fuel and use the low voltage battery to power the at least one low voltage load irrespective of a state of charge of the high voltage battery.
A vehicle comprising:
Dependencies are inferred from the claim text.