Toyota is working on a self-pressurizer that reuses escaping hydrogen gas to make vehicles more efficient.
Toyota is pushing hydrogen-powered vehicle technology forward with a liquid hydrogen system design that includes a self-pressurizer to save escaping gas and reuse it as fuel to increase engine efficiency. Toyota introduced a liquid system in the GR Corolla H2 Concept in 2023, which keeps hydrogen at -253 degrees Celsius during filling and storing in the tank. Hydrogen exists as a gas at room temperature, so the pumps have to operate cold to prevent the liquid from boiling.
” It then hopes to feed any additional boil-off to a small fuel cell package to power the hydrogen pump motor for further efficiency. Liquid nitrogen vehicles are a much more technically grueling affair for both storage and system configuration. “Hydrogen pumps are the most failure prone components in all hydrogen systems — cryogenic or gaseous,” writes Washington State University professor Dr. Jacob Leachman in an email to The Verge.
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