Experimental analysis of operating characteristics of proportional valves for fuel cell engines
WU Donglai
Abstract：As a key component of hydrogen supply system of fuel cell engine,proportional valve is mainly used to regulate the hydrogen flow rate of fuel cell stack and control the inlet pressure by controlling the opening.It has the characteristics of fast response speed,simple control and low cost.Aiming at the actual application scenarios of the current proportional valve in fuel cell engines,the working characteristics test scheme of the proportional valve under different test conditions is designed,and a certain proportional valve is taken as the object of test verification,in order to help enterprises to select and match the proportional valve and optimize the control strategy.The test results show that the operating characteristics of the proportional valve are different from those of the proportional valve during load lifting and load dropping,and it has hysteretic interval.The working characteristics of the proportional valve are positively correlated with the inlet pressure,but the correlation with the outlet pressure is different,and the pressure of the front end of the proportional valve should be paid attention to when applied.
Keywords：fuel cellproportional valveoperating characteristicshysteresis interval
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 9-12 )