Measuring and testing – Rotor unbalance – In situ
Patent
1989-11-06
1991-10-22
Chapman, John E.
Measuring and testing
Rotor unbalance
In situ
G01M 128
Patent
active
050584286
ABSTRACT:
A method and apparatus is provided for determining the unbalance of the wheels of a motor vehicle under test by means of unbalance measuring equipment. Such equipment is operated with a d.c. voltage supply in the form of the battery of the vehicle under test which functions as the sole source of that supply. The driven wheels of the vehicle under test are accelarated by the vehicle engine until a constant wheel speed is obtained within a given range. The unbalance values of the driven wheels at constant wheel speed are determined and appropriate correction is made. Wheel driving structure may also be provided for rotating the non-driven wheels of the vehicle under test to determine the unbalance of these wheels. The wheel driving structure for rotating the non-driven wheels is also powered by a d.c. voltage source in the form of the vehicle battery.
REFERENCES:
patent: 2618971 (1952-11-01), Herzegh
patent: 3686955 (1972-08-01), Butler
patent: 3719886 (1973-03-01), Vanderberg et al.
patent: 3726145 (1973-04-01), Bedford et al.
patent: 4162445 (1979-07-01), Campbell
patent: 4554833 (1985-01-01), Goebel
Chapman John E.
Schenck Auto-Service-Gerate GmbH
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