Regenerative Braking Systems and their functionsDylan Beam, Alexander Deutsch, Nick Kopycinski

http://www2.mazda.com/en/technology/env/i-eloop/

Why Use Regenerative Braking?

Energy Crisis

62.5% of energy is wasted through frequent braking in town driving2

23% improvement in fuel consumption2

Smaller Accessories1

Emissions reduction

www.conceptmotorsltd.com

1 Clegg, S.J. (1996) A Review of Regenerative Braking Systems. Working Paper. Institute of Transport Studies, University of Leeds, Leeds, UK.

2 Xu, Guoqing, Weimin Li, Kun Xu, and Zhibin Song. "An Intelligent Regenerative Braking Strategy For&nbsp;Electric Vehicles." <i>Energies</i> 4.9 (2011): 1461-477. Web.

History1930s- Rail systems4

1950s- Buses4

1967- Concept car introduction3

1997- Prius released5

2000- Prius mass produced5

3. Voelcker, John. "Electric-Car Trivia: When Was Regenerative Braking First Used?" Green Car Reports . High Gear Media, 10 Jan. 2014. Web. 19 Oct. 2015.4. Donev, Jason. "Regenerative Braking." Energy Education. University of Calgary, n.d. Web. 19 Oct. 2015.5. Bowling, Clarke. "Toyota Prius Turns 16: How the Hot Hybrid Has Changed over the Years." NY Daily News. New York Daily News, 28 June 2013. Web. 19 Oct. 2015.

http://www.greencarreports.com/news/1089510_electric-car-trivia-when-was-regenerative-braking-first-used

How Does Regenerative Braking Work?

Regular brakes waste large amounts of useable energy6

Regenerative Braking systems use the engine to harness this energy6

When slowing down, the engine switches to reverse mode7

The kinetic energy from the engine is transferred to the battery7

6 Ahn, J. K., K. H. Jung, D. H. Kim, H. B. Jin, H. S. Kim, and S. H. Hwang. "ANALYSIS OF A REGENERATIVE BRAKING SYSTEM FOR HYBRID ELECTRIC VEHICLES USING AN ELECTRO-MECHANICAL BRAKE." International Journal of Automotive Technology 10.2 (2008): 229-34. Web. 28 Sept. 2015.

7 Kepner, R., "Hydraulic Power Assist − A Demonstration of Hydraulic Hybrid Vehicle Regenerative Braking in a Road Vehicle Application," SAE Technical Paper 2002-01-3128, 2002, doi:10.4271/2002-01- 3128.

http://carmaintenence.blogspot.com/2011/04/toyota-camry-hybrid.html

World-Wide Impact 20% of world's energy use from transportation8

40% of that energy from urban transit8

Can increase the range of a car by over 10%9

Rising cost of fuel, carbon emissions and desire for extended driving range is leading to a rise in this technology

8 "Print Features." Global Mass Transit: Regenerative Braking: Gaining Acceleration. Global Mass Transit, 1 Nov. 2014. Web. 19 Oct. 2015.

9 Lv, Chen, Junzhi Zhang, Yutong Li, and Ye Yuan. “Mechanism analysis and evaluation methodology of regenerative braking contribution to energy efficiency improvement of electrified vehicles.” Energy Conversion and Management 92 (2015) : 469-482. ScienceDirect. Web. 30 Sept. 2015.

ExamplesTesla

Ford

Toyota

Nissan

Honda

Mazda

BMW

Hyundai

Fiat

Chevy

...

http://blog.caranddriver.com/2013-ford-fusion-energi-plug-in-hybrid-epa-certified-earns-100-mpge-combined-rating/

http://www.caranddriver.com/tesla/model-s

http://www.caranddriver.com/reviews/2013-fiat-500e-ev-first-drive-review

http://www.caranddriver.com/features/2016-chevrolet-volt-dissected-everything-you-need-to-know-feature