Design solutions

Dayco belts

Published:  23 September, 2013

Start-Stop functions will continue to be used by the VMs in order to achieve EU emission targets across vehicle ranges and component suppliers have had to go back to the drawing board and develop suitable systems. A vital part of these systems is the starter and while some VMs have opted for an uprated starter motor, others have chosen to use a starter/alternator driven by a belt for a quick and quiet engine start with the combined component switching between each function. Dayco worked with Peugeot/Citroen to create an auxiliary belt system with the strength to start and restart the engine instantly when the vehicle pulls away but had to be no wider than a standard belt. This resulted in the patented Dayco Self Tensioning System which maintains a balanced tension on both sides of the belt, enabling the starter/alternator to seamlessly switch between its starting and charging modes to allow the vehicle's Start-Stop system to function to its full potential. The cornerstone development of this self-balancing device is the rigid connection of its pulleys, which allows it to maintain the correct belt tension irrespective of the direction of the load.

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