Patent ID: 8262539
Filing Date: 2012-09-11
Classification: F16D,F16H,Y10T

Abstract:
1. A power transmitting apparatus for selectively transmitting power from a driving source of a vehicle to wheels of the vehicle, comprising: a torque converter having a torque amplifying function; a clutch mechanism comprising a first clutch device configured to transmit a driving force of the driving source to the wheels through the torque converter so as to move the vehicle and a second clutch device configured to transmit the driving force of the driving source to the wheels without the power transmitting system of the torque converter so as to move the vehicle wherein the first clutch device includes at least two clutches; a selecting device configured to selectively operate the first and second clutch devices so as to transmit the driving force of the driving source to the wheels through a power transmitting system of the torque converter and for transmitting the driving force of the driving source to the wheels without the power transmitting system of the torque converter by operating the first clutch device and the second clutch device in accordance a plurality of different modes of operation of the vehicle, at least one of the modes being a starting mode; an input-side measuring device configured to measure an input-side rotational speed of the first clutch device; an output-side measuring device configured to measure an output-side rotational speed of the first clutch device; and a slip ratio calculating device for the first clutch device configured to calculate a slip ratio of the first clutch device based on at least one of the difference or the ratio between the rotational speed measured by the input-side measuring device and the rotational speed measured by the output-side measuring device; wherein a power transmitting system from the driving source of the vehicle to the wheels comprise the torque converter and a transmission, the clutch mechanism and a variable speed unit being arranged within the transmission, and wherein the first clutch device being operable with capacity control, the capacity control of the first clutch device being performed based on the slip ratio calculated by the slip ratio calculating device for the first clutch device, the first clutch device being arranged downstream of the torque converter in the power transmitting system.