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US 2013/0255646 A1Published application
System and method for emptying a tank
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Ross Dykstra Pursifull, Donald J. Lewis
Life of this patent
Estimating the term…
Abstract
A system for method for emptying a gas storage tank of a vehicle is presented. In one example, engine valve timing is adjusted to facilitate reducing pressure within the gas storage tank. The system and method may extend the use of the gas stored in the gas storage tank.
Claims20
A method for emptying a tank, comprising:
- solely supplying a gaseous fuel to an engine when a pressure of the gaseous fuel is greater than a threshold pressure;
- and
- supplying the gaseous fuel and a liquid fuel when the pressure of the gaseous fuel is less than the threshold pressure.
A method for emptying a tank, comprising:
- supplying a gaseous fuel to an engine via a tank;
- operating the engine with the gaseous fuel and a first valve timing at a first condition when a pressure of the gaseous fuel is greater than a first threshold;
- and
- operating the engine with the gaseous fuel and a second valve timing at the first condition when the pressure of the gaseous fuel is less than the first threshold.
1 more element
A method for emptying a tank, comprising:
- supplying a gaseous fuel to an engine via a tank;
- operating the engine with first gaseous fuel injector when a pressure of the gaseous fuel is greater than a first threshold;
- and
- operating the engine with a second gaseous fuel injector when the pressure of the gaseous fuel is less than the first threshold.
1 more element
Dependencies are inferred from the claim text.