Patent ID: 7131932
Filing Date: 2006-11-07
Classification: B60W,F16D,F16H,Y10T

Abstract:
1. A method for determining a transmittable torque, the method which comprises: providing an automatic transmission of a motor vehicle, the automatic transmission having a clutch for transmitting torque from an engine shaft to a transmission input shaft, having a gear stage and having a synchronizing device for selectively engaging and disengaging the gear stage in the automatic transmission; providing a control device for controlling at least one of a shifting of the automatic transmission, the clutch, and an engine torque; pre-synchronizing, with the synchronizing device, the gear stage in the automatic transmission by applying a given synchronizing force to the synchronizing device but without engaging the gear stage; measuring speeds of the engine shaft and of the transmission input shaft; and determining a torque transmitted by the clutch by comparing the speeds of the engine shaft and of the transmission input shaft while taking into account a current synchronizing force.