Measuring and testing – Testing of shock absorbing device
Reexamination Certificate
2007-03-20
2007-03-20
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Testing of shock absorbing device
C073S011070, C073S011080, C073S011090
Reexamination Certificate
active
11103920
ABSTRACT:
A method of testing a vibration damper mounted between a body and a wheel in a motor vehicle includes the steps of storing a parameter which corresponds to the damping force of a new vibration damper in a memory unit, wherein the parameter is the cushioning work of a tire relative to a defined excitation of a new vibration damper; subjecting the wheel to reciprocating excitation which causes the vibration damper to generate a damping force; determining the cushioning work of the tire based on the damping force during the reciprocating excitation; comparing the cushioning work of the tire during the reciprocating excitation with the parameter stored in the memory unit; and determining that the damper is defective when the cushioning work during the reciprocating excitation differs from the stored parameter by more than a predetermined amount.
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Kirkland, III Freddie
Lefkowitz Edward
ZF Friedrichshafen AG
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