| 摘要 |
In the method and the apparatus for the examination of shock absorbers installed on a vehicle, a vibratory platform, on which one wheel of the vehicle is stood and which may be reciprocated with a suitable amplitude and variable frequency in a vertical, is employed to subject the wheel to an oscillation. The damping of the shock absorber is checked from the force response of the running gear to the oscillations of the vibratory platform and the relative phase function between the force exerted by the vibratory platform and the motion of the vibratory platform. The data signal, which represents the variations with time of the force response at a target frequency, is split by a tension-compression stage means into a compression stage signal, which is characteristic for the compression stage of the shock absorber, and a tension stage signal, which is characteristic for the tension stage of the shock absorber. The compression stage signal and the tension stage signal are separately supplied to further preparing means. As a basis of assessment for the quality of the installed shock absorber the degree of axle damping as related to the quotient of the spring-suspended mass to the non-spring-suspended mass is calculated. The measured values of the degree of axle damping are related to a characteristic line of a critical or border value degree of axle damping, which delimits the range of non-acceptable degrees of axle damping.
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