Alliedsignal Inc.

Allied Corporation

Other

Peter H Tsang

Seong K Rhee

Joseph P Coyle

Michael G Jacko

John G VanderPoorte

Tung Liu

James M Kubik

Yiren S Wang

Theodore F Schnitz

Friction material pads for use in a brake system with an aluminum-metal matrix composite rotor wherein a brake application can create operational temperatures that approach 450C. The formulation of the composition for the friction pads is generically a basic non-asbestos organic formula modified to include a high abrasive content, solid lubricant package, and a porous copper powder. The porous copper powder which makes up from 2-18 percent by weight the friction pads has a nominal diameter of 0.20 mm. The porous copper powder proportionally responds to temperature and mechanical forces generated during a brake application by deforming and smearing to aid in the formation of a glaze between the engaging surfaces of the friction pads and aluminum-metal matrix composite rotor. This glaze prevents scoring of the aluminum-based rotor while at the same time maintaining a substantial stable coefficient of friction of approximately 0.4 during brake applications over a wide range of speeds and deceleration rates.

Porous copper powder modified friction material

A noise sensor for supplying a central processing unit of an anti-lock brake system with a noise signal corresponding to vibrations produced during braking. The central processing unit responds to the noise signal by supplying a control valve assembly with an operational signal which modulates the fluid pressure supplied to a wheel cylinder to create a predetermined fluid pressure frequency therein to nullify vibrations and correspondingly attenuate noise produced thereby.

Noise attenuated anti-lock brake system

In a vehicle having a turbocharger (12) for supplying pressurized air to a combustion chamber in an engine (10) and a storage reservoir (34) for supplying pressurized air as a power source for a brake system (35), a polymeric fiber membrane (46) for separating pressurized air from a compressor (18) into moist oxygen enriched air and dry nitrogen enriched air. The moist oxygen enriched air is added to inlet air of the turbocharger (12) to enhance combustion of fuel in the combustion chamber while the dry nitrogen enriched air is communicated to the storage reservoir (34) to operate the brake system (35) and reduce the possibility of oxidization of components therein.

Polymeric membrane air separator for a turbocharger and brake system in

A composition of material for use as a friction material in a brake and its method of manufacture. Liquid double salts of dibasic and monobasic (ammonium-potassium hydrogen) phosphoric acid (DSP) is added to a dry mixture of reinforcing fiber, friction modifiers, fillers and phenolic resin to create a high viscosity slurry. Thereafter, a metallic (magnesium) oxide and para formaldehyde (para) are added to the slurry. Molds which have been previously heated are filled with the slurry and any excess removed. The metallic oxide reacts with the DSP and the para reacts with the phenolic resin to create a two binder matrix for holding the reinforcing fiber, friction material and fillers in a fixed relationship corresponding to the shape of a brake pad. The brake pads are removed from the molds and transported to a ventilated chamber where the internal curing proceeds at or near ambient temperature to complete the manufacture of the brake pad.

Molded brake pad

A method of manufacturing a friction article wherein a fiber material (14) having a continuous and substantially uniform three dimensional matrix which is filled with a slurry (24) made up of fillers, friction modifiers, a reinforcing material and a liquid binder. The filled fiber material is conveyed to a dryer (32) where the volatile solution is evaporated leaving the fillers, friction modifiers, reinforcing material and binder. The filled fiber material (14) is thereafter placed in an oven (50) where a compressive force is applied thereto while the binder is cured to define a second matrix which holds the fillers, friction modifiers, and reinforcing material in the three dimensional matrix.

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Union Lake, MI, United States of America

Peter H Tsang