A Mechanical Regenerative Brake and Launch Assist using an Open Differential and Elastic Energy Storage 2015-01-1680
Regenerative brake and launch assist (RBLA) systems are used to capture kinetic energy while a vehicle decelerates and subsequently use that stored energy to assist propulsion. Commercially available hybrid vehicles use generators, batteries and motors to electrically implement RBLA systems. Substantial increases in vehicle efficiency have been widely cited. This paper presents the development of a mechanical RBLA that stores energy in an elastic medium. An open differential is coupled with a variable transmission to store and release energy to an axle that principally rotates in a single direction. The concept applies regenerative braking technology to conventional automobiles equipped with only an internal combustion engine where the electrical systems of hybrid vehicles are not available. Governing performance equations are formulated and design parameters are selected based on an optimization of the vehicle operation over a simulated urban driving cycle. The functionality of this elastically-based regenerative brake device has been demonstrated on a physical prototype.
Citation: Myszka, D., Murray, A., Giaier, K., Jayaprakash, V. et al., "A Mechanical Regenerative Brake and Launch Assist using an Open Differential and Elastic Energy Storage," SAE Int. J. Alt. Power. 4(1):199-208, 2015, https://doi.org/10.4271/2015-01-1680. Download Citation
David H. Myszka, Andrew Murray, Kevin Giaier, Vijay Krishna Jayaprakash, Christoph Gillum
University of Dayton, Stress Engineering Services Inc
SAE 2015 World Congress & Exhibition
SAE International Journal of Alternative Powertrains-V124-8EJ, SAE International Journal of Alternative Powertrains-V124-8