Patent ID: 7377374

Claim:
A method for use in an automated shifting transmission of a vehicle with a non-synchronized reverse gear for determining a point of contact during a closing path of a clutch at which the clutch begins to transmit a torque wherein the point of contact is determined as that point in a clutch closing path at which the torque transmitted by the clutch is large enough to displace a tooth ( 3 ) of a sliding sleeve ( 1 ) against a tooth ( 4 ) of a clutch body ( 2 ) of a reverse gear-toothed wheel in a tooth-on-tooth position, the method comprising the steps of: initiating the method by disengaging the reverse gear and the clutch; engaging and subsequently disengaging a synchronized braking of one of a transmission input shaft and a transmission countershaft; moving a reverse gear sliding sleeve on a transmission shaft to engage a reverse gear clutch body connected with a reverse gear-toothed wheel; testing whether the reverse gear sliding sleeve is meshed with the reverse gear dutch body and whether the reverse gear is engaged; when the reverse gear is engaged, terminating the method; and when the reverse gear is not engaged, further closing the clutch up to a predetermined point of contact; and again testing whether the reverse gear sliding sleeve is meshed with the reverse gear clutch body and whether the reverse gear is engaged; and when the reverse gear is not yet engaged, further closing the clutch and again testing whether the reverse gear sliding sleeve is meshed with the reverse gear clutch body and whether the reverse gear is engaged; and when the reverse gear is engaged, storing one of the point of contact or a regulating path of the clutch up to the point of contact and terminating the method.