Method and apparatus for maintaining vehicle battery state-of-ch

Details Method and apparatus for maintaining vehicle battery state-of-ch Method and apparatus for maintaining vehicle battery state-of-ch

1993-11-04

1995-03-28

Pellinen, A. D.

Prime-mover dynamo plants

Electric control

Engine control

123339, 290 40R, 290 40A, 290 40C, 320 61, 322 38, H02P 904

Patent

active

054020077

ABSTRACT:
In a vehicle having a voltage regulated electric alternator driven by an engine for supplying power to drive electrical loads and to charge a vehicle battery, a method of maintaining battery state-of-charge includes adaptively learning a system voltage set-point during a first mode of engine operation probabalistically resulting in an electrical system operative in set-point regulation. The method further determines from the adaptively learned system voltage set-point and a present system voltage during a second mode of engine operation that the electrical system is operative in auto-regulation. Idle speed is controlled in response to the regulation state of the electrical system to maintain the system in set-point regulation to ensure adequate battery charge or minimal battery discharge during the second mode of engine operation.

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Yano & Yamamoto; Vehicle Electrical Power Systems--Present and Future, 1992; Convergence '92, pp. 313-318.
Guba; Management of Electrical Loads to Improve Fuel Economy--1993 Chrysler LH Vehicles; 1992 Convergence '92, pp. 309-312.

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