Patent ID: 8914180
Filing Date: 2014-12-16
Classification: B60K,B60L,B60W,B60Y,F02N,Y02T,Y10S

Abstract:
1. A method of restarting an engine of a vehicle comprising: determining via a controller vehicle operating conditions requiring a restart of the engine following cutoff of engine fuel during an automatic shutdown subsequent to a key start of the engine; determining an operating parameter of at least one of the engine, a first energy storage device, and a second energy storage device; wherein the first energy storage device is operable in a first range of operating voltage having a first minimum voltage and a first maximum voltage; wherein the second energy storage device is operable in a second range of operating voltage having a second minimum voltage and a second maximum voltage; wherein the second maximum voltage is greater than or equal to the first minimum voltage and less than the first maximum voltage; placing a switching device in an off-state to operatively disconnect both a starter motor and a motor/generator from the second energy storage device if the operating parameter is different than a predetermined reference parameter by at least a predetermined amount; energizing a solenoid to thereby operatively connect the starter motor with the engine through a gear train; and after said energizing the solenoid, powering the starter motor and operating the motor/generator as a motor to restart the engine.