Zf Friedrichshafen Ag

Bernd Lutz

Martin Miller

Vyacheslav Brushkivskyy

Alexander Paul

A detent device for a transmission, having a shifting element, first and second end-position retaining configurations arranged at first and second positions, respectively on the shifting element, the second position is different from the first, and a neutral retaining configuration arranged on the shifting element at a third position different from the first and second positions. A latching first detent element which, depending on the position of the shifting element, latches either at the first or second end positions in the first or second end-position retaining configurations, respectively, and another latching detent element, which latches in the neutral retaining configuration when the shifting element is in its neutral position. The neutral retaining configuration has a retaining contour which is designed and/or orientated differently on the shifting element from the first end-position retaining configuration and from the second end-position retaining configuration. A transmission with a detent device.

Detent device and transmission

A hydraulic system () of an automatic transmission of a motor vehicle includes a hydraulic pump () powered by a drive engine for supplying pressure to the hydraulic system (). A hydraulic reservoir () by which, when the drive engine is at rest, a pressure drop in a main pressure circuit () of the hydraulic system () can at least be delayed. The hydraulic reservoir () is connected to the main pressure circuit () by way of an orifice () or a throttle.

Hydraulic system of an automatic gearbox

A transmission having a plurality of shifting elements which are selectively engaged and disengaged when a gearshift is carried out, and a plurality of gearsets which, depending on the shifting position of the shifting elements produce a defined transmission ratio, and a shifting oil system which supplies the shifting elements with oil in order to operate them and a cooling and lubricating oil system which supplies assemblies of the transmission with oil for cooling and/or lubricating. From the shifting oil provided by the shifting oil system, a partial stream of oil can be tapped off for cooling and/or lubricating the shifting elements, such that a quantity of cooling and lubricating oil that is or can be supplied by the cooling and lubricating oil system can be reduced to the quantity required for cooling and/or lubricating those assemblies of the transmission which do not contain the shifting elements.

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Uhldingen-Mühlhofen, Germany

Bernd Lutz