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US 2015/0083089 A1Published application
Fuel oxidation reduction for hybrid vehicles
AssigneeFord Global Technologies, LLC
InventorsRussell Randall Pearce, Kenneth J. Kuenzel
Life of this patent
Estimating the term…
Abstract
Systems and methods to control fuel tank pressure to reduce fuel oxidation in plug-in hybrid electric vehicles are disclosed. A method comprises routing vapors from a fuel system canister to the fuel tank to maintain the fuel tank pressure at a desired pressure. In this way, the engine may be maintained off for greater durations while still retaining fuel quality of fuel stored on-board the vehicle.
Claims20
A method, comprising:
- when fuel tank pressure is below a threshold, routing fuel vapors from a fuel system canister to the fuel tank to maintain the fuel tank pressure at a desired pressure.
A system, comprising:
- a fuel tank;
- a pressure sensor to sense vapor pressure within the fuel tank;
- a vapor canister;
- a vapor line between the fuel tank and the vapor canister;
- and
- a pump located in the vapor line.
3 more elements
The system of 7, wherein the fuel tank can withstand a 45 kpa positive pressure and a 21 kpa negative pressure.
A system, comprising:
- a fuel tank;
- a pressure sensor to sense vapor pressure within the fuel tank;
- a vapor canister;
- a vapor line between the fuel tank and the vapor canister;
- and
- a diverter valve.
3 more elements
Dependencies are inferred from the claim text.