In this paper the results of a project funded by Regione Toscana aimed at reducing the power absorption of auxiliary devices in vehicles are presented. In particular the design. testing and application of a magnetorheological clutch (MR) is proposed. aimed at disengaging the vacuum pump. https://www.nacrack.com/sale-now-The-Simpsons-Krusty-Burger-Adult-T-Shirt-hot-value/