Fig. 6.12. Elements (AKP), available after removal of the central console: 1 lamp of illumination of the coulisse of switching; 2 – cover; 3 – parking mode clamp; 4 – switching mechanism
In AKP between a number of planetary mechanisms and the engine the hydrotransformer (the hydrodynamic converter of torque) which serves for torque transmission of the engine by means of the ATF liquid (Automatic Transmission Fluid) circulating in his working cavities is located. The hydrotransformer consists of the pump, the turbine and the reactor. These elements are concluded in the general casing in such a way that form the closed oil circulation. The engine brings a pump wheel which transforms mechanical energy to hydraulic into rotation. The turbine connected to main shaft AKP transforms this energy to torque. The reactor is located between the pump and the turbine which always have a certain difference in the frequency of turns. At start of the car it is maximum and decreases at increase in speed of the movement. Thus, at a certain measure there is always a skidding mode.
Care at towage
If your Mercedes is not got, its pushing or towage will not help to launch the engine. The hydrotransformer cannot provide at the idle engine feedback with it. Therefore it is necessary to try to start at first the engine by means of starting wires.
It is possible to tow the car only forward, having installed the AKP selector lever in situation "N". During towage the AKP oil pump does not rotate while planetary mechanisms are given to rotation by the driveshaft. Therefore it is possible to tow the car only on distance no more than 50 km and with a speed of movement not higher than 50 km/h.