The Influence of Wheel Assembly Non Uniformity on Disc Brake Lateral Runout General Motors LLC

Format:

Conference/Event

Author/Creator:

Antanaitis, Antanaitis, author.

Conference Name:

SAE 2011 Annual Brake Colloquium And Engineering Display (2011-09-18 : New Orleans, Louisiana, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

The importance of achieving good (low) assembled lateral runout of the brake disc is well recognized in the industry - it is a critical feature for avoiding issues such as wear-induced disc thickness variation and vibration/shudder during braking. Significant efforts and expense has been invested by the industry into reducing disc brake lateral runout. However, wheel assemblies also have some inherent runout, which in turn cause cyclical forces to act on the brake corner during vehicle movement. Despite the stiffness of the wheel bearing (which aligns the brake disc with the caliper and knuckle), these "tire non-uniformity" forces can be sufficient to promote deflection of the assembly that is appreciable compared to typical disc lateral runout tolerances. This paper covers measurements of this phenomenon on three different vehicles (compact, mid-size, and large cars), under a variety of operating conditions such as speed, wheel assembly runout, and wheel assembly balance. It also proposes a simple model to illustrate the magnitude and effects of the forces at work, and to explain the sometimes surprising results

Notes:

Vendor supplied data

Publisher Number:

2011-01-2378

Access Restriction:

Restricted for use by site license