Patent ID: 9080620
Filing Date: 2015-07-14
Classification: F16D

Abstract:
1. A method for determining the filling quantity in the actuating system of a clutch arrangement comprising: operably coupling an input shaft and an output shaft using one of a forward clutch or a reverse clutch, wherein a first actuating unit is configured to actuate the forward clutch and a second actuating unit is configured to actuate the reverse clutch; continuously driving the input shaft at a first speed; applying a first hydraulic pressure to the first of a first or second actuating unit over a first time interval; measuring and storing the speed of the output shaft as a first reference speed and releasing the first hydraulic pressure in the first of the first or second actuating unit at the end of the first time interval; continuously measuring the speed of the output shaft and detecting the length of a second time interval at the end of which the speed of the output shaft has dropped to a factor X<1 of the first reference speed; calculating and storing the mean acceleration of the output shaft over the second time interval; filling the at least partially emptied second of the first or second actuating unit over a third time interval; measuring and storing the speed of the output shaft as a second reference speed at the end of the third time interval; comparing the second reference speed with a calculated speed of the output shaft calculated at the end of the third time interval from the first reference speed and the mean acceleration of the output shaft; repeating the previous steps with one of an extended time interval when the second reference speed is approximately equal to the calculated speed, or a short time interval when the second reference speed is less by a factor Y>1 than the calculated speed; and storing the length of the third time interval, the extended time interval, and the short time interval when the second reference speed is approximately less than the calculated speed.