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Alternator control for battery charging

United States Patent

July 14, 2015
View the Complete Patent at the US Patent & Trademark Office
In accordance with an aspect of the present disclosure, an electrical system for an automotive vehicle has an electrical generating machine and a battery. A set point voltage, which sets an output voltage of the electrical generating machine, is set by an electronic control unit (ECU). The ECU selects one of a plurality of control modes for controlling the alternator based on an operating state of the vehicle as determined from vehicle operating parameters. The ECU selects a range for the set point voltage based on the selected control mode and then sets the set point voltage within the range based on feedback parameters for that control mode. In an aspect, the control modes include a trickle charge mode and battery charge current is the feedback parameter and the ECU controls the set point voltage within the range to maintain a predetermined battery charge current.
Brunstetter; Craig A (Fenton, MI), Jaye; John R (Northville, MI), Tallarek; Glen E (Grosse Pointe Woods, MI), Adams; Joseph B (Northville, MI)
FCA US LLC (Auburn Hills, MI)
13/ 718,650
December 18, 2012
STATEMENT OF GOVERNMENT INTEREST Subject matter described herein was developed in part with research funding provided by the United States Government under Grants from the Department of Energy (Grant Number DE-EE0003347). The U.S. Government may have certain rights to the invention.