G - Physics – 01 – M
Patent
G - Physics
01
M
73/17
G01M 17/00 (2006.01) G01M 17/007 (2006.01)
Patent
CA 1320354
ABSTRACT The invention is directed to a method of and an apparatus for determining the engine power of an automotive vehicle on a roller dynamometer the rollers of which can be braked with a constant brake power. In accordance with the invention, in a first measuring operation the net power of the engine acting on the vehicle wheels is determined by sensing the braking power acting on the dynamometer rollers. In a second measuring operation, the slowing-down time (t1) is measured within which the speed has decreased from a predetermined value (v1) to a second preselected value (v2) with unbraked dynamometer rollers. In a third measuring operation the dynamometer rollers are braked with a constant brake power and the slowing-down time (t2) is measured within which the speed has decreased from the initial value (v1) to the preset final value (v2), There- after, the internal power loss (Px) of the automotive vehicle is calculated in accordance with the following equation: Px = Image The gross power of the vehicle engine may be determined by adding the calculated power loss to the previously measured net power.
590940
Cassan Maclean
Mbh Maschinenbau Haldenwang Gmbh & Co. Kg
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