GETRAG HybridDrive 7HDT300 The Optimized Hybridization Uli Christian Blessing, Chief Engineer Hybrid Transmissions GETRAG

Transcription

1 GETRAG HybridDrive 7HDT300 The Optimized Hybridization Uli Christian Blessing, Chief Engineer Hybrid Transmissions GETRAG

2 Agenda Key features of GETRAG HybridDrive 7HDT300 Level of hybridization Schematic overview of the TorqueSplit hybrid Functionality Packaging options Details of the e-machine Optimized integration of the stator and rotor Cooling Concept Modularity Comparion of GETRAG HybridDrive vs. competitors Summary

3 Key Features of the GETRAG HybridDrive 7HDT300 Gearset 7HDT300 based on 7DCT300 Torque range, up to 300 Nm Adaptable EM-ratio Wet nested clutch Electro hydraulic actuation Electro mechanical shift actuation Electrical on-demand cooling for clutch and e-machine Electrical park lock system (w/o additional actuator) Ready for Start/Stop & Hybrid (w/o additional hardware) Integrated e-machine with different power levels Plug-In Hybrid (up to > 360 V) Mild Hybrid (48 V)

4 Level of Hybridization of the GETRAG HybridDrive 7HDT300 Fuel Efficiency Improvement in the NEDC 0% Micro Conventional Car GETRAG PowerShift 7DCT300 offers Start/Stop + extended sailing w/o hardware change Fuel reduction Mild Integrated 48 V e machine with dedicated oil cooling Full to Plug-In Integrated High Power e machine with dedicated oil cooling 100%

5 Schematic Overview of GETRAG HybridDrive 7HDT300 clutch 2 sub transmission 2 2,4,6,R engine e-machine PCU 1,3,5,7 clutch 1 sub transmission 1 scalable functionality by using different e machine lengths

6 Hybrid Modes and Functionalities of GETRAG HybridDrive 7HDT300 Hybrid Modes Electric driving Sailing Recuperation Boosting Generator-mode / Load-Shift Charge@Standstill Hybrid Functionalities Starter of the internal combustion engine not necessary Restart with Torquesplit effect Cold Cranking Impulse Start

7 Hybrid Modes - Restart of Internal Combustion Engine EM torque torque reserve for engine cranking rpm 2,4,6,R PCU 0 0 n EM EM speed n max 100 Nm 1,3,5,7 Reduced restart duration compared to parallel hybrid Higher torque of EM available for electric driving Restart possible at very low vehicle speeds 250 Nm rpm 2,4,6,R PCU 1,3,5,7 800 rpm

8 Hybrid Modes - Restart of Internal Combustion Engine Restart with 12V Starter Electric Driving G2 Torquesplit Restart G3 Electric Driving G6 Parallel Restart G6 a Car in m/s 2 Torque in Nm Speed in 1/min n VM n TG1 n TG2 T K1 T K2 T EM n VM n TG1 n TG2 n VM n TG1 n TG2 T EM T K1 T K2 T K1 T K2 T EM

9 Packaging Options of GETRAG HybridDrive 7HDT300 E-machine Front Version E-machine Rear Version

10 Hybrid Drivability requirements from Mild to Plug-In Hybrid Drivability requirements for electric driving (Plug-In Hybrid) max. speed: up to 130 km/h (w/o torque interruption) max. wheel torque: > 2100 Nm continuous power: 30 kw max. speed) peak power: 70 kw 250Vdc; 420Arms) Drivability requirements for electric driving (Mild Hybrid) max. speed: up to 50 km/h (w/o torque interruption) max. wheel torque: > 1800 Nm continuous power: 8 kw (@ max. speed) peak power: 15 kw (@ 48Vdc; 350Arms)

11 Comparison of GETRAG HybridDrive 7HDT300 vs. Competitors 7HDT300 Hybrid AT Hybrid CVT 48 Volt System High-Speed EM, El. Driving possible Only via crankshaft mounted version Only via crankshaft mounted version Mild-Hybrid High-Speed EM, High-Torque PSM High-Torque PSM El. Driving possible Full-Hybrid High-Speed EM + ASM possible High-Torque PSM mandatory High-Torque PSM mandatory Plug-In Hybrid Side-by-side EM enables packaging Increase of transmission length Increase of transmission length Efficiency Very low losses, no aux. system Auxilliary system necessary High losses, aux system necessary Costs No add. actuation, High-speed EM Add. oil-pump, High- Torque PSM Add. oil-pump, High- Torque PSM Functionality No 12V starter necessary No torque converter, Low-Speed Driving No torque converter, Low-Speed Driving

12 Modularity of Hybridisation Hybridisation with axial parallel e-machine is also possible on 7DCT500 6DCT150 Modularity is based on Active parts of e-machine (at least same diameter) Oil-cooling Bidirectional electric cooling pump Integration of the e-machine Hybrid SW functionality

13 Summary GETRAG HybridDrive 7HDT300 offers a scalable hybridisation from Mild to Plug-In Hybrid Integrated high-speed e-machine with oil-cooling All hybrid functionalities are available (48 V / Mild option offers pure electric driving) No additional actuation needed for hybridisation of 7DCT300 Wide operational area of TorqueSplit Hybrid is outstanding compared to other concepts Modular approach enables usage of same e-machine kit for 7DCT500 6DCT150

14 GETRAG HybridDrive 7HDT300 The Optimized Hybridization Uli Christian Blessing, Chief Engineer Hybrid Transmissions GETRAG