| 摘要 |
An air-cooled eddy current dynamometer for the use in a vehicle emissions test stand application. The dynamometer housing includes an air inlet manifold for drawing cooling air radially inwardly into the dynamometer and an air outlet manifold permitting the expulsion of heated air tangentially outwardly from the dynamometer. An end of the dynamometer housing has a plurality of openings therein allowing cooling air to be drawn axially inwardly into the dynamometer housing. The combination of air flows radially inwardly through the inlet manifold, axially inwardly through the openings in the end of the dynamometer and tangentially outwardly through the outlet manifold significantly increases the cooling of the dynamometer permitting its use in a vehicle test stand application wherein the dynamometer is placed in a recess or pit within the floor of the structure in which the test stand is installed. In such an installation, the outlet manifold portion of the dynamometer is positioned so that the heated cooling air from the dynamometer is directed tangentially outwardly from the recess or pit in a path that is substantially parallel to and above the surface of the floor in which the test stand is installed.
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