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US 2025/0233178 A1Published application
Fuel cell system
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsKazunori ITO, Hirokazu ANDO, Yuki FUJITA
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Abstract
A fuel cell system wherein a fuel supply unit is driven by pulse control when a required supply flow rate of fuel to a fuel cell is less than a flow rate at maximum circulation efficiency at which the circulation efficiency of an ejector is the maximum value when the fuel supply unit is driven by proportional control, and the fuel supply unit is driven by the proportional control when the required supply flow rate of the fuel to the fuel cell is greater than or equal to the flow rate at the maximum circulation efficiency.
Claims3
A fuel cell system including:
- a fuel cell;
- a fuel supply passage for supplying fuel to the fuel cell;
- an ejector provided in the fuel supply passage;
- a fuel supply unit for supplying the fuel to the ejector;
- and
- a circulation passage for circulating the fuel that is unused in and discharged from the fuel cell to the ejector,
- the fuel cell system being configured to supply the fuel to the fuel cell through the fuel supply passage via the ejector,
- wherein the fuel cell system is configured to:
- drive the fuel supply unit by pulse control when a required supply flow rate of the fuel for the fuel cell is smaller than a flow rate determined at a maximum circulation efficiency at which a circulation efficiency of the ejector is a maximum value when the fuel supply unit is driven by proportional control;
- and
- drive the fuel supply unit by the proportional control when the required supply flow rate of the fuel for the fuel cell is equal to or larger than the flow rate determined at the maximum circulation efficiency.
8 more elements
A fuel cell system including:
- a fuel cell;
- a fuel supply passage for supplying fuel to the fuel cell;
- an ejector provided in the fuel supply passage;
- and
- a circulation passage for circulating the fuel that is unused in and discharged from the fuel cell to the ejector,
- the fuel cell system being configured to supply the fuel to the fuel cell through the fuel supply passage via the ejector,
- wherein the ejector includes, as a nozzle for injecting the fuel,
- a first nozzle;
- and
- a second nozzle that can inject the fuel with a larger flow rate than the first nozzle,
- when switching the nozzle used from the first nozzle to the second nozzle, both the first and second nozzles are used for a predetermined time.
8 more elements
Dependencies are inferred from the claim text.