US 6,047,794 AGranted

Vibration damper for use in wheel brake

AssigneeSumitomo Electric Industries, Ltd.

InventorYukio Nishizawa

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Abstract

A vibration damper for detecting vibrations of break pads and vibrating the pads in such a way as to damp the vibrations detected. The damper has the function of adjusting control constants for a control circuit according to the degree of deterioration with time, of the pads due to wear so that vibrations of the pads can be damped in an optimum manner. A vibration detector means detects frictional vibrations of the pads and the disk rotor. A control signal corresponding to the detected vibration frequency is applied to a vibrator means through a control circuit. When an input signal for correction timing is inputted from an ignition switch, a signal generator transmits a signal having a predetermined frequency to the vibrator means. The resulting vibration is detected by a signal detector. Based on the detection signal, transfer functions for the control circuit are adjusted to suppress vibrations having squealing frequencies.

Claims4

Dependent claims

A vehicle brake vibration damper that dampens vibrations of a vehicle brake having a rotating member and a pair of friction members, the vibrations being created upon braking of the rotary member by the friction members, the vibration damper comprising:

a vibration detector for detecting vibrations of the vehicle brake and producing a first signal that represents vibrations of the vehicle brake;
a vibrator for producing vibrations to be applied to at least one of said friction members;
first control means for receiving said first signal from said vibration detector and producing a second signal for activating said vibrator based on said first signal and at least one control constant stored in said first control means;
and
second control means for producing and sending a predetermined third signal to said vibrator according to one of:
while said first control means is not producing said second signal;
and
forcibly interrupting the control by said first control means;
said second control means further adjusting said at least one control constant based on said first signal, which is produced as a result of the application of said third signal to said vibrator, to a value such that brake vibrations are attenuated by vibrations applied by said vibrator based on said second signal.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/988,404Filed 10 Dec 1997
Priority: JP 8-33988319 Dec 1996
Granted: 11 Apr 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F16F 15/02
Suppression of vibrations in systems ; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion: suppression of…
F16D 55/02
Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes: with axially-movable discs or pads…
F16D 65/0012
Noise or vibration control: active vibration dampers
F16D 2129/12
Electric or magnetic: electrostrictive or magnetostrictive elements, e.g. piezoelectric