1. Regenerative Braking Systems and their functions
Dylan Beam, Alexander Deutsch, Nick Kopycinski

2. 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
Energy Crisis: We are always looking for new and more efficient ways to source energy
62.5% of energy that could be harnessed and reused is dissipated into the enviroment and wasted (Explain how breaks work via diagram)
This added source of energy to power the car will reduce fuel consumption in non-electric cars.
The regenerative breaking system may allow to eliminate other components in the car as in the electric starter and reduce the size of the battery. and fuel tank in hybrid applications.
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 Electric Vehicles." <i>Energies</i> 4.9 (2011): Web.

3. History
1930s- Rail systems4 1950s- Buses Concept car introduction Prius released Prius mass produced5
1967 Amitron by American Motor Company
2000 Prius first car to mass produce with RGB system
3. Voelcker, John. "Electric-Car Trivia: When Was Regenerative Braking First Used?" Green Car Reports. High Gear Media, 10 Jan Web. 19 Oct
4. Donev, Jason. "Regenerative Braking." Energy Education. University of Calgary, n.d. Web. 19 Oct
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 Web. 19 Oct

4. 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
Regular breaks use friction to convert the kinetic energy of the wheels into heat to slow down the car.
 This heat is a huge amount of energy that is harnessed through regenrative breaking.
A regenerative breaking system actually has little to do with the conventional breaking systems.
When the break pedal is depressed, the engine actually switches o reverse mode and begins moving in the opposite direction.
This means that the engine starts working like a generator and converts the change in kinetic enrgy into electrical power, which is stored in the battery.
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): Web. 28 Sept
7 Kepner, R., "Hydraulic Power Assist − A Demonstration of Hydraulic Hybrid Vehicle Regenerative Braking in a Road Vehicle Application," SAE Technical Paper , 2002, doi: /

6. 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 Web. 19 Oct
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) : ScienceDirect. Web. 30 Sept

7. Examples
Tesla Ford Toyota Nissan Honda Mazda BMW Hyundai Fiat Chevy ...
Every major and minor car company has a car on the market using this system both in hybrid and electric models