CONTINUOUSELY VARIABLE TRANSMISSION AND CONTROLLING METHOD THEREOF

摘要

According to the present invention, a transmission to transmit power from the engine of a vehicle comprises: a first hydraulic-mechanical transmission unit coupled to the output part of the engine, and formed as a combination of a hydrostatic transmission and a mechanical differential gear; an auxiliary transmission part transmitting an output to an axle when the output is continuously varied by the first hydraulic-mechanical transmission unit; a PTO shaft transmitting the power from the engine to a working machine; an axle load measurement unit to measure an axle load applied to the first hydraulic-mechanical transmission unit; a working machine load measurement unit to measure a working machine load applied to the PTO shaft; a working machine load reduction unit to reduce the working machine load applied to the PTO shaft; and a control part performing a control to reduce the axle load by varying the output from the engine or the gear shift mode of the vehicle or performing a control to reduce the working machine load by controlling the working machine load reduction unit according to output signals from the axle load measurement unit and the working machine load measurement unit. The transmission according to the present invention is capable of preventing an overload or engine stall due to the engine overload.