Patent ID: 7680568
Filing Date: 2010-03-16
Classification: B60K,B60L,B60W,B60Y,Y02T,Y10S

Abstract:
1. A method for efficiently controlling an engine of a heavy-duty hybrid-electric vehicle of at least 10,000 pounds Gross Vehicle Weight Rating (GVWR), the heavy-duty hybrid-electric vehicle having a generator, an inverter, a propulsion motor, a first energy storage, and a control computer, the method comprising: enabling a function comprising at least one of a Stop-Start and an Idle-Stop function; determining a first vehicle propulsion power requirement associated with an emergency situation of the heavy-duty hybrid-electric vehicle; determining a first energy storage first State Of Charge; when the energy storage first State Of Charge is above an energy storage first State Of Charge minimum threshold, turning off the engine if the first vehicle propulsion requirement is below a first vehicle propulsion requirement minimum threshold; when the energy storage first State Of Charge is below an energy storage first State Of Charge minimum threshold, turning off the engine if the first vehicle propulsion requirement is below a first vehicle propulsion requirement minimum threshold; and commanding the generator to spin the engine to drive at least one Power Take-Off accessory.