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P2 Hybridization

The Top 3 of P2

Space, Space, Space

I. Introduction

Figure 1 Schematic diagram of P2 hybridization in connection with a double clutch transmission

II. State of the art

Figure 2 Implemented series solutions for P2 hybridization of double clutch transmissions

Figure 3 Clutch slip during vehicle launch with a combustion engine (left) and an electric motor (right)

Figure 4 Friction energy of the clutches for double clutch transmissions, with and without P2 hybridization

Figure 5 Energy needed for vehicle launch with various stages of electrification of wet and dry double clutch transmissions

Figure 6 P2 hybrid module with a rotor-integrated, wet triple clutch system

Figure 7 Oil flow inside of the rotor for the sub-clutches and the bearing positions

Figure 8 Flow simulation for a P2 hybrid module with an integrated wet triple clutch

Figure 9 Wet lining for double and also triple clutch systems

Figure 10 Further development of the wet triple clutch

Figure 11 Radially nested dry triple clutch

Figure 12 Triple clutch integrated inside the rotor

Figure 13 Further development of the double actuator system for C1 and C2 (3-piston actuator system)

Figure 14 Arrangement variations for the centrifugal pendulum absorber in the P2 hybrid system

Figure 15 Axially parallel arrangement of a P2 system with a triple wet clutch

III. Optimizing the installation space within the transmission

Figure 16 Optimizing installation space by using shorter synchronization units, taking the Schaeffler Short Synchro as an example

Figure 17 Synchronization unit with a rotary actuation under the gearwheels (Schaeffler Ultra Short Synchro)

IV. Compact double clutch transmissions with P2 hybridization

Figure 18 Measures for reducing the overall transmission length of P2 hybrid double clutch transmissions

V. Summary and outlook

The digital version of the Schaeffler Symposium 2018 “Mobility for Tomorrow” conference transcript