DEVICE AND METHOD FOR MAXIMIZING VEHICLE FUNCTIONALITY AND FUEL ECONOMY WITH IMPROVED DRIVE BEHAVIOR DURING MOTOR AUTO STOP START PROCESSES

摘要

A power management system of an auto-stop-starting vehicle includes a primary power source that provides power to an electric starter to start a vehicle engine and a secondary power source that is coupled in parallel to the primary power source. The secondary power source supplies energy to the electrical loads during an engine auto stop-start operation. The electrical loads maintain vehicle subsystem functionality during the engine auto stop-start operation. The energy supplied to the electrical loads is current limited during the engine auto stop-start operation. A controllable switch decouples the secondary power source during the engine auto stop-start operation from the primary power source and the starter. Operating parameters of the electrical loads are monitored during the engine auto stop-start operation. If, during the engine-auto-stop-start operation, a respective operating parameter threshold associated with the electrical loads is exceeded, the vehicle engine is automatically restarted and the controllable switch is then closed.