US 2025/0052290 A1 · BRAKING SYSTEM WITH REDUCED TENDENCY TO SQUEAL IN COLD CONDITIONS, IN PARTICULAR FOR ELECTRIC VEHICLES, AND ASSOCIATED BRAKE PAD AND METHOD

Abstract

Braking system (1) and method aimed to produce a forced increase in a damping layer (7) temperature of a brake pad (3), arranged between a metal support (5) and a friction material block (6) thereof, wherein the damping layer (7) is heated such as to stay at a temperature above a glass transition temperature of rubber components thereof, so assuring a maximum damping behavior; the heating is caused by magnetic induction generated by one or more electrically conducting coils (15) fed in AC by a power source (10) carried by the vehicle and arranged either integrated in the brake pad (3), e.g. carried by the support (5), or in the vicinity thereof.

Claims15

Dependent claims

A vehicle braking system (1;1b) for vehicles comprising:

an element to be braked (2) configured to be in use angularly connected to a wheel hub of a vehicle;
and
at least a braking element (3) configured to cooperate in use by friction with the element to be braked under the action of an actuator (4), the braking element comprising:
a metal support (5);
a block (6) of friction material carried by the support;
and
a damping layer (7) carried by the support (5) interposed between the support and the friction material block (6);
an electric device (8) configured to warm up the damping layer (7);
a control unit (9) to switch on and off the electric device;
and
a power source (10) for the electric device and the control unit.

8 more elements

A method for eliminating or at least reducing a tendency of a braking element (3), in particular a brake pad, to squeal during cold braking maneuvers of a vehicle equipped with the braking element, the braking element comprising a metal support (5), a friction block (6) carried by the metal support and a damping layer (7) or “underlayer”, interposed between the support and the friction block, the method comprising:

selectively producing a forced increase in a temperature of the damping layer (7), which increase is independent of a natural temperature increase of the damping layer (7) that occurs in use due to the energy dispersed by friction during the braking maneuver;
the increase in temperature being set such as to maintain the whole damping layer (7) constantly above a glass transition temperature of rubber components thereof, so as to ensure that the damping layer (7) always works at conditions assuring maximum damping behavior of the same.

Dependencies are inferred from the claim text.

Facts

Application

18/722,679Filed 21 Dec 2022

Priority

IT 10202100003264524 Dec 2021

Published

13 Feb 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

F16D 65/0006
Parts or details: noise or vibration control
F16D 65/0971
Resilient means interposed between pads and supporting members or other brake parts: transmitting brake actuation force, e.g. elements interposed…
B32B 15/04
Layered products comprising a layer of metal: comprising metal as the main or only constituent of a layer, which is next to another layer of the…
B32B 15/18
Layered products comprising a layer of metal: comprising iron or steel

Braking system with reduced tendency to squeal in cold conditions, in particular for electric vehicles, and associated brake pad and method

Life of this patent

Braking system with reduced tendency to squeal in cold conditions, in particular for electric vehicles, and associated brake pad and method

Life of this patent

Abstract

Claims15