Abstract
Conventional automotive accessory drives currently use up to four V-belts. This is a result of the popular options of power steering and air conditioning. In addition, new models are equipped with belt driven A.I.R. pumps to meet EPA emission standards. These drive systems have become increasingly more complex and less reliable as accessory loads and underhood temperatures have increased. A single "V-Ribbed" belt driving from both surfaces and tracked in "serpentine" fashion around the acces sory sheaves has been developed. This system provides possibilities for reduced drive cost and increased reliability as well as important space saving. Use of a synchronous driving surface permits use of this system on overhead cam engines or for driving the distributor on both conventional and rotary engines. A key feature of the drive system is a floating idler which maintains constant belt tension. This feature eliminates maintenance and prevents damage to drive components caused by undertensioning or overtensioning the belt. Assembly costs are reduced since all accessories are mounted in a fixed position and complex mounting brackets are elim inated.
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