Suspension tester and method

Details Suspension tester and method Suspension tester and method

1992-11-10

1994-12-06

Williams, Hezron E.

Measuring and testing

Testing of shock absorbing device

In situ vehicle suspension

73670, G01M 1704

Patent

active

053699742

ABSTRACT:
The apparatus and method of the present invention is designed for testing dampers of a motor vehicle without removing the dampers from the vehicle. The apparatus includes a movable support for contacting the bottom surface of a tire associated with a damper to be tested and members for oscillating the movable support to impose vertical oscillations on the tire. Transducers sense the force applied by the tire to the support during oscillation of the support while the oscillating members are controlled to oscillate the support over a predetermined range of frequencies. Circuitry is provided responsive to the transducers for determining, as a function of the frequency of oscillation, the adhesion of the tire to the support and the phase angle of the response of the tire to the oscillation. The circuitry further determines from the phase angle at a single frequency the adequacy of the damping of the damper under test.

REFERENCES:
patent: 3855841 (1974-11-01), Hunter
patent: 3902352 (1975-09-01), Buzzi
patent: 3937058 (1976-02-01), Hilbrands
patent: 4002051 (1977-01-01), Hilbrands
patent: 4589273 (1986-05-01), Tamasi et al.
patent: 4703645 (1987-11-01), Hudacsek et al.
patent: 5056024 (1991-10-01), Stuyts

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