Method of controlling engine stop-start operation for heavy-duty hybrid-electric and hybrid-hydraulic vehicles
First Claim
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 energy storage first State Of Charge;
determining a first vehicle propulsion power requirement associated with the acceleration of the heavy-duty hybrid-electric vehicle; and
,turning off the engine if the first energy storage first State Of Charge is above a first energy storage first State Of Charge minimum threshold and the first vehicle propulsion requirement is below a first vehicle propulsion requirement minimum threshold.
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Accused Products
Abstract
This invention relates to a Start-Stop method for a heavy-duty hybrid vehicle that turns off the internal combustion engine when the vehicle stops or, optionally, when the vehicle travels downhill. The Stop-Start method automatically restarts the internal combustion engine when the vehicle starts accelerating or is no longer traveling downhill. The software instructions for the Stop-Start method reside within the programming of the hybrid vehicle control computer as a subset of the hybrid vehicle control strategy in hybrid-electric or hybrid-hydraulic heavy-duty vehicle. During the time the internal combustion engine is turned off the necessary vehicle accessories operate from the available power of the hybrid high power energy storage.
137 Citations
24 Claims
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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:
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enabling a function comprising at least one of a Stop-Start and an Idle-Stop function; determining a first energy storage first State Of Charge; determining a first vehicle propulsion power requirement associated with the acceleration of the heavy-duty hybrid-electric vehicle; and
,turning off the engine if the first energy storage first State Of Charge is above a first energy storage first State Of Charge minimum threshold and the first vehicle propulsion requirement is below a first vehicle propulsion requirement minimum threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification