Navy

Optimizing fuel economy with the selection of drive modes

System in use by the Navy saves fuel and time

Software & Information Technology

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Modern vehicles that move on land, on the sea, or in the air often have power plants with multiple modes. A truck can be in various gears, each of which is a mode. A multi-engine aircraft will sometimes deliberately operate with some of its engines shut down.

Each set of operating engines is a mode. Ships sometimes have multiple shafts or multiple engines of different types, and a decision must be made regarding the best mode to use. Fuel consumption varies continuously with speed in each mode, and each mode has limits on the speeds that can be safely obtained.

For the Navy, which spends well over $1 billion per year on fuel, optimizing consumption is of high importance. Likewise, for shipping lines, airlines and trucking fleets, optimally balancing speed to the destination with fuel consumption is a critical driver of profit.

USS John Paul Jones (DDG 53). In full power mode, four LM2500 gas-turbine engines power this Arleigh Burke-class, guided-missile destroyer. Other modes where some of these engines are shut down, or where one of the two shafts is not powered at all, are also possible. Depending on propulsion mode and speed, these four turbines can collectively consume from 600 to 7,000 gallons per hour of distillate marine fuel. Photo: DVIDS

Optimization experts with the Navy have developed a method for selection of the most fuel-efficient mode of a vehicle, including the possibility that the most efficient mode may be mixed; that is, the vehicle should operate in one mode part of the time and in a different mode the rest of the time. The process generalizes published data and provides a method to find optimal, mixed-mode transits for vehicles. The software system allows the user to vary constraints and goals.

Prenegotiated License Terms

Non-Exclusive
Partially Exclusive
Exclusive
License Execution Fee
$2,000
$3,000
$4,000
Royalty on Net Sales
2%
3%
4%
Minimum Annual Royalty
$1,000
$1,500
$2,500
Annual Patent Fee
$1,000
$1,500
$1,500
Sublicensing
No
Yes
Yes
Sublicensing Royalty on Net Sales
N/A
3%
4%
Sublicensing Royalty on Other Income
N/A
50%
50%

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