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Proven High Efficiency Actuation and Clutch Technologies for eAMT™ and eDCT™
Technical Paper
2009-01-0513
ISSN: 0148-7191, e-ISSN: 2688-3627
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Language:
English
Abstract
The paper reports upon the invention, development and critical assessment of key subsystems applied to electrically actuated AMTs and DCTs, and describes their simulation, design, rig testing and associated demonstration vehicles. Specially, these devices address the following:
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direct clutch and gear actuation using a moving magnet linear actuator;
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devices to reduce the actuation power for sustained control of wet or dry clutches targeting an average actuation energy over the NEDC cycle of < 30W electrical power;
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thermal management of a dry clutch using a heat transfer device to maintain facing materials below 220°C;
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requirement for a device to prevent roll-back on an incline and hence avoid significant clutch heating;
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in combination, increase the life of DCT dry clutch modules to 150,000 miles for small and medium cars.
Advanced prototypes are presented with measured data that indicates equivalent or improved dynamic response and CO2 relative to in-market alternatives, whilst illustrating the realistic potential for lower manufacturing cost.
In summary, the maturation of previously introduced innovative devices is reported and further novel subsystems are introduced to make viable the adoption of automated layshaft-type transmissions according to the attribute/cost balance for each main market.
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Authors
- J. C. Wheals - Ricardo Driveline and Transmission Systems, Ricardo Plc.
- J. McMicking - Ricardo Driveline and Transmission Systems, Ricardo Plc.
- S. Shepherd - Ricardo Driveline and Transmission Systems, Ricardo Plc.
- B. Bonnet - Ricardo Driveline and Transmission Systems, Ricardo Plc.
- N. Jackson - Ricardo Driveline and Transmission Systems, Ricardo Plc.
- O. Hall - Ricardo Driveline and Transmission Systems, Ricardo Plc.
Citation
Wheals, J., McMicking, J., Shepherd, S., Bonnet, B. et al., "Proven High Efficiency Actuation and Clutch Technologies for eAMT™ and eDCT™," SAE Technical Paper 2009-01-0513, 2009, https://doi.org/10.4271/2009-01-0513.Also In
References
- SAE 2007-01-1096 Double Clutch Transmission (DCT) using Multiplexed Linear Actuation Technology and Dry Clutches for High Efficiency and Low Cost Wheals J.C. Turner A. Ramsay K. O'Neil A. Bennett J. Fang Haiping Ricardo Driveline and Transmission Systems, Ricardo Plc.
- Direct-Drive Electromechanical Linear Actuator for Shift-by-Wire Control of an Automated Transmission Turner Andrew *,** Ramsay Keith Clark Richard Howe David
- Patent Application: WO2008044049 2008 04 17 RICARDO UK LTD (GB)
- Patent Application GB2444594 Brake device having a wrap spring 2008 06 11 RICARDO UK LTD (GB)
- Patent Application: WO2008044047 Clutches 2008 04 17 RICARDO UK LTD (GB)
- Patent Application: Disengaging Systems Number:US2004173429 2004 09 09 LUK LAMELLEN & KUPPLUNGSBAU (DE)
- www.LUK.de