Importance

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Abstract

A fuel supply system is configured to reduce the pressure of hydrogen gas delivered from a hydrogen cylinder by a high-pressure regulator arranged in series, regulate a flow rate of the pressure-reduced hydrogen gas by a hydrogen flow regulating device, and supply the hydrogen gas to a fuel cell. The high-pressure regulator includes a middle passage in which the hydrogen gas after being pressure-reduced by a first regulator and before being pressure-reduced by a second regulator enters, a rear passage in which the hydrogen gas after pressure-reduced by the second regulator enters, a communication passage allowing communication between the middle passage and the rear passage, and an internal air check valve provided in the communication passage and arranged to allow the hydrogen gas to flow in a direction from the middle passage toward the rear passage and block the hydrogen gas from flowing in a reverse direction thereto.

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First Claim