Disk brake device for reducing brake noise

Details Disk brake device for reducing brake noise Disk brake device for reducing brake noise

1996-06-26

1998-05-05

Graham, Matthew C.

Brakes

Wheel

Axially movable brake element or housing therefor

188250E, F16D 6502

Patent

active

057462925

ABSTRACT:
Brake noise (the unpleasant "squeal" noise) emitted when a motor vehicle brakes is effectively reduced. In a disk brake which applies a braking force by gripping a disk rotor from both sides by means of two brake pads, a weight is fitted by way of an elastic body to an oscillating member of the disk brake (e.g., brake pad, piston or caliper).
By fitting a weight to an oscillating member by way of an intermediary elastic body, the weight is subject to the vibration of the brake pad and will vibrate. At low frequencies the vibration of the weight is in same phase with the vibration of the brake pad, but as the vibration frequency of the brake pad increases, the vibration of the weight shifts out of phase with the vibration of the brake pad. In the vicinity of a certain frequency and at frequencies above this, this phase difference becomes nearly 180 degrees. By matching this frequency to the brake noise frequency, the vibration of the brake pad can be suppressed by the vibration of the weight.
Simply by adding inexpensive parts, brake noise of a heavy vehicle with large disk brakes can be reduced to a sufficient extent for practical purposes, and the original performance can be maintained even after brake pads have been replaced.

REFERENCES:
patent: 5099962 (1992-03-01), Furusu et al.

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