The complete vehicle test for a fuel-cell vehicle (FCV) is conducted on running drum tester, in which the working performance of radiator is studied under the step-constant speed condition.

The sealing and drive mechanism performance of the sampling device are examined in accordance with the transient pressure zero balance method and in combination with the field practice.

The new method of designing duct of balanced air suction by means of computer is suggested on the basis of analysing constant and decreasing velocities in the main collecting points.