Patent ID: 9046149
Filing Date: 2015-06-02
Classification: F16G,F16H

Abstract:
1. A starter-alternator assembly comprising: a belt drive that connects an engine shaft of an internal combustion engine with a reversible electric machine comprising a poly-V belt, which in turn comprises a body made of elastomeric material, a plurality of filiform resistant inserts longitudinally embedded in the body and constituted as a hybrid cord, and a coupling portion integrally connected to said body and comprising a plurality of continuous V-shaped ribs set alongside one another and alternating with continuous V-shaped grooves, wherein said continuous V-shaped ribs alternate with continuous V-shaped grooves along the entire length of the belt; wherein said belt of said assembly has a dynamic modulus, at a tensile force preset at 600 N/rib/branch with a sinusoidal variation of ±400 N/rib/branch at 15 Hz, that after 10 000 cycles is higher than 110 000 N/rib/branch, wherein the belt comprises EPDM, and wherein said hybrid cord comprises fibers of a first material comprising glass fibres and fibres of a second material comprising carbon fibres, and the fibres of the first material are wound around the fibers of the second material such that the fibres of first material externally coat the fibres of second material.