Measuring and testing – Vehicle chassis – Steering
Patent
1989-03-03
1991-08-06
Raevis, Robert
Measuring and testing
Vehicle chassis
Steering
G01L 326
Patent
active
050367005
ABSTRACT:
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 poower. 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 is measured within which the speed has decreased from a predetermined value to a second preselected value with unbraked dynamometer rollers. In a third measuring operation the dynamometer rollers are braked with a consant brake power and the slowing-down time is measured within which the speed has decreased from the initial value to the preset final value. Thereafter, the internal power loss of the automotive vehicle is calculated. The gross power of the vehicle engine may be determined by adding the calculated power loss to the previously measured net power.
REFERENCES:
patent: 3554022 (1971-01-01), Geul
patent: 4158961 (1979-06-01), Ben-David
patent: 4159642 (1979-07-01), Hudson et al.
patent: 4370883 (1983-02-01), Coetsier et al.
patent: 4391131 (1983-07-01), Scourtes
Maschinenbau Haldenwang GmbH & Co. KG
Raevis Robert
LandOfFree
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