Friction Coefficient Variation at Minute Vibrating Velocity between Brake Pad and Disc Rotor ADVICS Company Limited

Format:

Conference/Event

Author/Creator:

Aoki, Aoki, author.

Contributor:

Kurita, Yutaka

Nishizawa, Yukio

Oura, Yasunori

Conference Name:

SAE 2013 Brake Colloquium & Exhibition - 31st Annual (2013-10-06 : Jacksonville, Florida, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

Brake squeal is uncomfortable noise that occurs while braking. So, it is an important issue of automobile quality to reduce the brake squeal occurrence. Although many researchers had reported about brake squeal, there are many examples that have not been understood well.For those squeals, some of occurrence mechanisms are assumed. The d/dv<0 theory is one of them, and the d/dv represents a slope of friction coefficient for sliding velocity. If the frictional force has a negative damping characteristic, that is d/dv<0, disc vibration may increase. It has been said for a long time that a negative d/dv characteristic affects brake squeal occurrence.Many researchers had measured the d/dv to clarify brake squeal factors. In those results, the slope of friction coefficient at steady sliding speed was used for the d/dv. However, the pad undergoes minute vibrations while the brake is squealing. So, we developed a device that can measure the friction coefficient with minute vibrating velocity. A piezo-actuator and a dynamic load sensor are used to measure the friction coefficient at minute vibrating velocity.The results say that d/dv at the minute vibrating velocity differs from that at the steady sliding speed. And, the results also showed that d/dv at the minute vibrating velocity tended to increase for actuating frequency, and tended to slightly decrease for thrust load

Notes:

Vendor supplied data

Publisher Number:

2013-01-2041

Access Restriction:

Restricted for use by site license