Abstract
A fuel system for a hydrogen-fueled internal combustion engine vehicle. A compressor/expander is installed in fluid connection between the fuel tank and the engine's fuel delivery system. The compressor/expander operates in compressor mode when the hydrogen fuel in the fuel tank is below a pressure desired for fuel delivery. It operates in expander mode when the hydrogen fuel in the fuel tank is above the desired pressure. The compressor/expander has inlet and outlet metering valves. A controller receives fuel tank pressure and temperature measurements and calculates timing of the metering valves to maintain the desired pressure into the fuel delivery system.
Patent Number
12,372,037
Date Of Issue
Inventors
Edward M. Smith