No.1022E 2026Special Edition on the Technologies that Support Manufacturing and Manufacturing Equipment Development of a High-Pressure Hydrogen Regulator and Relief Valve for Hydrogen Engines |
| Category | TECHNICAL REPORT |
|---|---|
| Author | H. KOBAYASHI FC System Engineering Dept., Automotive Business Unit |
| Abstract | In order to meet the needs of hydrogen engines, we have developed a high-pressure hydrogen regulator and relief valve for hydrogen engines, while making maximum use of the technology cultivated in our conventional products. For the high-pressure hydrogen regulator, a stepped piston structure was used to share parts with the conventional product while supporting higher regulated pressure. For the relief valve, the amount of rubber disc protrusion and compression was properly controlled to prevent an increase of operating pressure due to low temperature sticking. In addition, a pressure relief hole with an appropriate flow path area is provided in the spring chamber to prevent pressure fluctuations during hydrogen release. |
| Keyword | regulator, relief, hydrogen, high pressure, engine |
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ENGINEERING JOURNAL
Summary:9,2026
Summary:10,2025-9,2026