Patent ID: 8733191
Filing Date: 2014-05-27
Classification: B60K,F16H,Y02T

Abstract:
1. A drive arrangement for a motor vehicle power take off (PTO) comprising a PTO shaft arranged and adapted for coupling to a power driven implement, an input shaft arranged and adapted for coupling to a rotary driver, and a continuously variable transmission coupled between the input and PTO shafts to transfer drive between them at a continuously variable drive ratio, wherein the continuously variable transmission comprises a ratio varying unit (“variator”) which has a rotary variator input and a rotary variator output and in that the drive arrangement further comprises a controller which serves to control variator input and output torques wherein the transmission automatically accommodates changes in speed at the PTO shaft by virtue of changes in its drive ratio such that in response to excessive load applied to the power take off shaft, variator input and output torques are limited by the controller and slowing of the power take off shaft due to the load applied to it is automatically accommodated by virtue of a change in variator ratio.