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Wheel Optimized Brake Torque at the VE Mechatronic Brake
Technical Paper
2011-01-2358
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Conventional brakes commence with given brake torque distribution and abruptly change to wheel individual torque corrections when ABS-ESP intervenes. This leads to less than optimal braking, firstly around the transition from “given distribution” to individual ABS-ESP control and secondly when ABS-ESP switches from “locked” to “rotating”. Neither of these states offers the optimal deceleration.
The VE mechatronic brake (EMB, electro mechanical brake) is designed to apply wheel individual braking with wheel optimized torques that give the best braking and stability from initial input to maximum deceleration, without sudden transition to ABS-ESP.
With electric drive motors, a very rapid adjustable part of wheel individual torque can be combined with the individually controllable VE brakes. Sudden wheel locking can be unlocked instantaneously with no mechanical intervention, by reduction of the regenerative torque or even with electrical acceleration, simply by commands to the e-drive motor controller. A rotating wheel with insufficient braking torque can be brought to the grip limit by a rapid regenerative brake torque increase. The instantaneously adjustable e-drive motor (generator) torque offers a mechatronic brake time to set the new wheel torque, but retains the very fast response time of the combined braking. Using this combination, a very quick vehicle yaw control response can also be achieved.
In this paper, simulations and measurements of wheel individual friction braking combined with rapid controlled e-drive motor torque is discussed, as well as other properties of this combination e.g. determination of true friction brake torque.
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Authors
Citation
Putz, M., Wunsch, C., and Morgan, J., "Wheel Optimized Brake Torque at the VE Mechatronic Brake," SAE Technical Paper 2011-01-2358, 2011, https://doi.org/10.4271/2011-01-2358.Also In
References
- Putz, M. “VE Mechatronic Brake: Development and Investigations of a Simple Electro Mechanical Brake,” SAE Technical Paper 2010-01-1682 2010 10.4271/2010-01-1682
- Putz, Michael Maier, Rainer Auto-release at an Electro Mechanical Brake at power-off; Vienna Engineering 6th European Conference on Braking JEF 2010
- Putz, Michael Gruber, Manfred Self-Energizing Brake or Movement Carrier Device; Vienna Engineering PCT WO 2009/062880 A1 22 Mai 2009
- Putz, Michael Auer, Daniel Friction Brake; Vienna Engineering PCT WO 2010/133463 A1 25 11 2010
- Plank, Michael Geschwindigkeitsrückrechnung bei ABS-geregelter Kurvenfahrt; Sachverständige Wien
- Hartley, J. Day, A. Campean, I. McLellan, R. et al. “Braking System for a Full Electric Vehicle with Regenerative Braking,” SAE Technical Paper 2010-01-1680 2010 10.4271/2010-01-1680
- von Albrichsfeld, C. Karner, J. “Brake System for Hybrid and Electric Vehicles,” SAE Technical Paper 2009-01-1217 2009 10.4271/2009-01-1217