Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled

摘要

A valve device (3) which is connected to a shift element (1,2) is connected to a system pressure line, control line (4) and release line (5). A pressure restricting valve (6) is provided on the release line of the at least one valve device and sets a predetermined low pressure so that the pipes always remain filled. The pressure restricting valve is attached to a pressure line so that pressurised medium can be fed into the release lines.