Patent ID: 6875140

Claim:
An engine auxiliary unit driving equipment for transmitting an engine driving force from a crank pulley fixed to an engine crankshaft to a plurality of engine auxiliary units, one of which is an alternator for a vehicle, comprising: a unitary driven poly-V pulley, which is provided at least in the alternator, having at least six grooves extending in a circumferential direction and a plurality of walls between the grooves; and a poly-V belt having a top surface and, a plurality of projections extending in parallel in a longitudinal direction so as to respectively engage with the grooves of the driven poly-V pulley, said poly-V belt being bridged between the crank pulley and the driven poly-V pulley so that the engine driving force is transmitted to said alternator via the poly-V belt and the driven poly-V pulley, wherein the poly-V belt is composed of a plurality of pieces substantially divided in an axial direction of the driven poly-V pulley so that each piece of the poly-V belt has at least 2 and less than 6 of said projections and each of said walls is lower than said top surface and a portion of the side surfaces of the projections that directly face each other are disposed above said walls to allow confronting side surfaces of adjacent pieces of the belt to come into contact with each other.