Patent ID: 11971143
Assignee: IVYS INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 11:
12. A method of dispensing hydrogen gas to a fuel tank of a vehicle during a fueling event via a variable-size valve comprising a valve stem that when rotated changes a size of the valve opening to change a flow rate of hydrogen gas passing through the valve opening, the valve stem coupled to a direct drive servo motor configured to rotate the valve stem to change the size of the valve opening, wherein one rotation of the direct drive servo motor results in one rotation of the valve stem, the method comprising:
receiving hydrogen gas from a hydrogen gas supply;
receiving as a first input:
a supply pressure of hydrogen from the hydrogen gas supply; and
a measured pressure downstream of the variable size valve and/or a tank pressure of hydrogen gas in the fuel tank;

receiving input indicative of a current size of the valve opening;
determining a target size of the valve opening that results in a target pressure and/or target flow rate at which it is desired to provide hydrogen gas to the fuel tank based at least in part on the first input and the first value; and
rotating the valve stem to change the current size of the valve opening to the target size.