Schaeffler applies cookies to secure an optimal use. With the further use of this website you accept the application of cookies. More Information

Actuation Systems

Innovative Power-on-Demand Concepts for Transmission Actuation

I. Introduction

Figure 1 Conflicting requirements for actuators in vehicle powertrains

II. Real power on demand

Figure 2 Throttling losses on pressure reduction valves of power packs

Figure 3 Comparison of real power-on-demand actuators (right) with hydraulic solutions and power packs

III. Examples of requirement-based actuators

Figure 4 Active Interlock transmission actuator and electric axle actuator

Figure 5 Actuators for automated driving and for smart interior solutions (Park-by-Wire)

Figure 6 Electric concentric slave cylinder (EZA) for activating the K0 clutch in hybrid modules

Figure 7 Hydrostatic clutch actuator (HCA)

Figure 8 Modular clutch actuator with new planetary spindle drive

Figure 9 Real power-on-demand actuator system for double clutch transmissions in various vehicle platforms

Figure 10 Efficiency gains for various actuator systems in relation to system costs for P2.5 and P2 double clutch transmissions

IV. Electric pump actuator

Figure 11 Electric pump actuator (EPA)

Figure 12 Operating principle of the two-pressure valve in the EPA

Figure 13 Actuator system for double clutch transmissions with two EPA and one HGA A transmission control unit (TCU) is not required because the EPA performs this function

Figure 14 Analysis of various actuator systems for P2 hybrid double clutch transmissions

V. Summary

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

III. Examples of requirement-based actuators