Brake caliper with reduced brake squeal
AssigneeGM Global Technology Operations LLC
InventorsMark T. Riefe, Brent D. Lowe, David B. Antanaitis, Patrick J. Monsere
Life of this patent
Estimating the term…
Abstract
An exemplary embodiment of a brake caliper has a housing with a first chamber and a second chamber. The brake caliper also has a first piston that moves in response to fluid pressure in the first chamber and has a second piston that moves in response to fluid pressure in the second chamber. A brake pad has a leading end portion that is acted upon by the first piston and has a trailing end portion that is acted upon by the second piston. A fluid passage leads to the first chamber. The trailing end portion contacts an associated rotor before the leading end portion contacts the rotor.
Claims20
A product comprising:
- a brake caliper comprising a housing with a first chamber and a second chamber, comprising a first piston moving in response to fluid pressure in the first chamber and comprising a second piston moving in response to fluid pressure in the second chamber, the brake caliper also comprising a brake pad with a leading end portion acted upon by the first piston and with a trailing end portion acted upon by the second piston;
- a fluid passage leading to the first chamber;
- and
- a valve located in the fluid passage and regulating fluid-flow to the first chamber so that the trailing end portion contacts a rotor before the leading end portion contacts the rotor.
A product comprising:
- a brake caliper comprising a housing with a first chamber, a second chamber, and a fluid inlet leading to the second chamber, comprising a first piston moving in response to fluid pressure in the first chamber and comprising a second piston moving in response to fluid pressure in the second chamber, the brake caliper also comprising a brake pad with a leading end portion acted upon by the first piston and with a trailing end portion acted upon by the second piston;
- and
- a fluid passage extending between the first and second chambers;
- the brake caliper being constructed and arranged so that when the brake caliper is activated fluid-flow flows through the fluid inlet, into the second chamber, through the fluid passage, and into the first chamber so that the trailing end portion contacts a rotor before the leading end portion contacts the rotor.
A method comprising:
- providing a brake caliper having a housing with a first chamber and a second chamber, having a first piston moving in response to fluid pressure in the first chamber and having a second piston moving in response to fluid pressure in the second chamber, the brake caliper also having a brake pad with a leading end portion acted upon by the first piston and with a trailing end portion acted upon by the second piston;
- pressurizing the first and second chambers;
- and
- regulating pressure to the first chamber so that the trailing end portion contacts a rotor before the leading end portion contacts the rotor.
Dependencies are inferred from the claim text.