OB5 dual clutch

Seven-speed dual-clutch gearbox 0B5/S tronic

Audi Q5/A4/A5.

The dual-clutch gearbox 0B5 provides a special driving experience.

Sub-gearbox 1 The odd numbered gears (1, 3, 5, 7) can be driven through the central input shaft 1 by clutch K1.

Sub-gearbox 2 The even numbered gears (2, 4, 6) and the reverse gear can be driven through input shaft 2 (a hollow shaft) by clutch K2.

The mechatronic system acts as the central gearbox control unit. It combines the electro-hydraulic control unit (actuators), the electronic control unit and some of the sensors into a single unit. On account of the longitudinal configuration, the rpm sensors of both gearbox input shafts and the gear sensor are located on a separate mounting bracket.

The mechatronic system controls, regulates and performs the following functions:

– Adaptation of oil pressure in the hydraulic system to requirements – Dual clutch regulation – Clutch cooling regulation – Shift point selection – Gearbox control and regulation – Communication with other control units – Limp-home programs – Self-diagnostics


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