Method for operating a clutch

摘要

A method of operating a clutch serving as a shift element and/or starting clutch of a drive train. During engagement, the clutch will be filled by a fast filling up to a defined minimum pressure. The fast filling is at least subdivided into two phases comprising a basic filling phase and an extension and/or a cutout phase. At the end of the basic filling phase, the actual clutch pressure is measured, and then, when the actual clutch pressure is equal to or larger than the minimum pressure, the extension and/or cutout phase is activated immediately following the basic filling phase. When the actual clutch pressure is lower than the minimum pressure, activation of the extension and/or the cutout phase is at least delayed by a pressure holding phase and, if necessary, by a pressure surplus phase.

主权项

1. A method of operating a clutch of a drive train of a motor vehicle, the method comprising the steps of:
providing a transmission with at least one hydraulic clutch; filling the clutch for engagement, from a hydraulic supply, the clutch being filled up to a defined minimum pressure by a fast filling phase which comprises a basic filling phase and a second phase; measuring, via a pressure sensor, an actual clutch pressure at an end of the basic filling phase; immediately terminating the basic filling phase from the hydraulic supply when the actual clutch pressure is either equal to or larger than the minimum pressure; delaying termination of the basic filling phase by activating at least one of a pressure holding phase and a pressure surplus phase, when the actual clutch pressure is lower than the minimum pressure; and filling the clutch, during the basic filling phase, for a defined filling pulse characterized by a defined pulse duration and a defined pulse height, and extending the pulse duration in an event that the clutch pressure is lower than the minimum pressure at the end of the defined pulse duration.