Lightweight brake rotor with cooling passageways

摘要

A brake rotor including a rotor body made of a first material. The rotor body includes a central hub portion and a substantially annular disc portion extending from the central hub portion. The disc portion includes an inner disc surface and an outer disc surface. The brake rotor also includes an inner braking ring and an outer braking ring made of a second material. The inner and outer braking rings are fastened to the rotor body in an orientation substantially parallel with the disc portion and spaced from the respective inner and outer disc surfaces. The brake rotor includes projections extending from at least one of the inner and outer disc surfaces to support thereon the respective one of the inner braking ring and the outer braking ring. The projections are generally configured in elongated diamond-like shapes oriented along an axis extending radially outwardly from the central hub portion.