Patent ID: 11897438
Assignee: CUMMINS INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  F  H  Y | IPC B  F  H

Claim 0:
1. A system for a fuel cell vehicle, the system comprising:
a providing fuel branch configured to transfer a fuel cell fuel from the fuel cell vehicle to a receiving fuel cell vehicle;
a providing fuel cell fuel port;
a refueling nozzle;
a fuel cell fuel storage tank fluidically coupled to the providing fuel cell fuel port;
a refueling branch configured to transfer the fuel cell fuel to the fuel cell fuel storage tank of the fuel cell vehicle from an external source to refill the fuel cell fuel storage tank, the refueling branch being separate from the providing fuel branch;
a shutoff valve included in the providing fuel branch and coupled between the providing fuel cell fuel port and the fuel cell fuel storage tank;
a fuel cell fuel flowmeter included in the providing fuel branch and coupled between the shutoff valve and the fuel cell fuel storage tank, the fuel cell fuel flowmeter being configured to measure flow of the fuel cell fuel from the fuel cell fuel storage tank to the providing fuel cell fuel port;
a pressure regulator included in the providing fuel branch and coupled between the fuel cell fuel flowmeter and the fuel cell fuel storage tank, the pressure regular being configured to control pressure of the fuel cell fuel flowing from the fuel cell fuel storage tank to the providing fuel cell fuel port;
a first relief valve coupled to a first end of the fuel cell fuel storage tank and a second relief valve coupled to a second end of the fuel cell fuel storage tank, the second end of the fuel cell fuel storage tank being opposite the first end of the fuel cell fuel storage tank, and the first relief valve and the second relief valve being configured to selectively open or close to release at least a portion of the fuel cell fuel from the fuel cell fuel storage tank to decrease a pressure within the fuel cell fuel storage tank; and
a fuel cell fuel system controller communicatively coupled to the shutoff valve, the fuel cell fuel flowmeter, and the pressure regulator, the fuel system controller being configured to:
in response to the refueling nozzle being connected to the providing fuel cell fuel port, set a pressure of the pressure regulator and command the shutoff valve to open to initiate transfer of the fuel cell fuel from the fuel cell fuel storage tank to the providing fuel cell fuel port, and
in response to the refueling nozzle being disconnected from the providing fuel cell fuel port, command the shutoff valve to close to prevent transfer of the fuel cell fuel from the fuel cell fuel storage tank to the providing fuel cell fuel port.