Patent attributes
A bi-fuel vehicle includes an Internal Combustion Engine (ICE) to power the vehicle by combustion of liquid and gas-phase fuels. The vehicle has a dual fuel tank including a pressurizable gas-phase fuel compartment defined by a wall that is permeable by a gas-phase fuel. The gas-phase fuel compartment receives and contains the gas-phase fuel, and supplies the gas-phase fuel for combustion in the ICE. The dual fuel tank includes a liquid fuel compartment to receive and contain liquid fuel, and supply the liquid fuel for combustion in the ICE. A shell envelops the gas-phase fuel compartment, and defines the liquid fuel compartment. An interstitial space between the wall and the shell is in one-way fluid communication with the liquid fuel compartment. The interstitial space receives the permeated gas-phase fuel and channels the permeated gas-phase fuel to the liquid fuel compartment. The dual fuel tank has a vapor recovery system.
