Disk brake assembly, brake rotor and manufacturing method thereof

A technology of disc brakes and brake discs, applied in brake components, hydraulic drum brakes, chemical instruments and methods, etc., can solve problems such as disengagement and increased fuel consumption.

Active Publication Date: 2013-10-30
黄小弟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another problem with disc brakes is that the outer pads do not completely disengage from the disc when the brake pedal is released; while the inner pads will shrink slightly (0.15 mm), the outer pads are likely to slightly rub against the disc, increasing fuel consumption

Method used

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  • Disk brake assembly, brake rotor and manufacturing method thereof
  • Disk brake assembly, brake rotor and manufacturing method thereof
  • Disk brake assembly, brake rotor and manufacturing method thereof

Examples

Experimental program
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Embodiment

[0071] A 2002 Dodge Neon sedan, with a gross weight of 1,542 kg, or 15,129 Newtons, assuming that the front brakes are responsible for 70% of the braking of the car, 85% of the frictional heat is distributed to the brake disc, 15% is distributed to the brake pads, and 8% is tire slip. Decelerating from 128.7 kilometers per hour or 35.76m / s to a complete stop, with no brakes locked, the braking energy of the entire vehicle is:

[0072] E b = ( 15,129 ) ( 35.76 ) 2 2 ( 9.81 ) = 986,067 Nm = 0.274 kWh

[0073] The kinetic energy converted to brake heat absorbed by a front brake i...

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Abstract

Disclosed is an automotive disk brake assembly installed in an automobile having a wheel. The assembly includes a floating caliper supporting inner and outer brake pads and a brake rotor having a disk, a hat, wherein the hat is bolted to the wheel. A hydraulic cylinder pushes the inner brake pads into the disk surface, thereby causing the floating caliper to move so as to bring the outer brake pad into contact with the disk surfaces. Finally, the rotor is made of a material having a thickness and a coefficient of thermal expansion and conductivity, such that a complete 100 kilometer per hour, 0.9 gross vehicle weight braking causes the disk to expand in thickness by at least 0.10 mm and to cool to shrink in thickness, from its expanded thickness, by at least 0.05 mm within 60 seconds of cessation of braking, in an ambient temperature of less than 30 DEG C. The invention further provides a brake rotor and a manufacturing method thereof.

Description

technical field [0001] This application is a continuation-in-part of US Application No. 13 / 449,505 filed April 18, 2012, which is hereby incorporated by reference in its entirety. technical background [0002] Currently, most motor vehicles are equipped with disc brakes (also called brake discs), which are usually made of metal, carbon or ceramic materials, and are tightly connected to the wheel hub. When braking, a pair of brake pads located on both sides of the disc press against the disc, exerting pressure on the disc and creating friction to slow the vehicle down. One of the challenges of disc brake design is the need to absorb and dissipate a large amount of heat; this heat is converted from the vehicle's kinetic energy through braking friction. [0003] In current disc brake systems, brake heat is absorbed by the material between the two friction surfaces of each disc. As the disc rotates, heat is dissipated through 1) heat transfer between the two friction surfaces;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/52F16D65/09B22D19/00
CPCF16D51/52F16D65/09F16D65/125F16D2250/0015B32B15/01B22D19/04B22D19/0081F16D2200/0013F16D2200/003F16D65/127F16D2069/0491B22D19/16Y10T29/49496
Inventor 黄小弟宋小彬黄若南
Owner 黄小弟
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