Utilizing a Spring in a Utilizing a Spring in a Kinetic Regenerative Kinetic Regenerative

Braking System to Braking System to Reduce Engine SizeReduce Engine Size

Eugene LeeEugene Lee

A larger engine = greater torque and A larger engine = greater torque and faster max speedfaster max speed

Engines are excessively largeEngines are excessively large

http://www.mfe.govt.nz/environmental-reporting/report-cards/transport/2009/images/figure-8.jpg

NeedNeed

Vehicular TerminologyVehicular Terminology

Torque = rFsinTorque = rFsinӨӨ Horsepower = (torque*RPM)/5252Horsepower = (torque*RPM)/5252 1 Horsepower = 33,000 foot-pounds 1 Horsepower = 33,000 foot-pounds

per minute = 44,742 joulesper minute = 44,742 joules

Continuously Variable Continuously Variable TransmissionTransmission

Transmission that allows smooth Transmission that allows smooth gear changesgear changes

Can be used to Can be used to

increase / decrease increase / decrease

the turning speed the turning speed

of a deviceof a device

Literature ReviewLiterature Review

Li et al (2008) used a torsion spring Li et al (2008) used a torsion spring to store energy for vehicles.to store energy for vehicles.

Leonard et al (2003) used a tension Leonard et al (2003) used a tension spring to store energy for bicycles. spring to store energy for bicycles.

How the Spring will FunctionHow the Spring will Function

Spring will aid both in deceleration Spring will aid both in deceleration and accelerationand acceleration

Tension added

Tire slows down due to greater tension

Tension released

Tire spins due to release of tension

Spring DiagramSpring Diagram

Closes when car brake is pressed

Closes when accelerator is pressed

Signals of braking or accelerating

Possible PrototypePossible Prototype

Similar to actual model in design.

Electromagnetic/ hydraulic clamp

Attached to exterior frame

Car model

Variable resistance can be produced by changing gears, controlled by a microprocessor.

Bicycle Tire

Alternate prototypeAlternate prototype

Attached to exterior frame of bike to prevent turning

While braking/ accelerating, ends of spring device will attach to bicycle tire

Variable resistance can be produced by changing gears, controlled by a microprocessor.

Electromagnetic/ hydraulic clamp

Bicycle Tire

Bicycle model

Based off of Li (et al, 2008)

PurposePurpose

Experiment would attempt to find if Experiment would attempt to find if extra weight of the system will not extra weight of the system will not be offset by benefits created by be offset by benefits created by spring system.spring system.

Will try to find which method is more Will try to find which method is more efficient through formulas and efficient through formulas and statistical analysis: kinetic or statistical analysis: kinetic or electrical regenerative electricity.electrical regenerative electricity.

Do-abilityDo-ability

Materials, not cheap, but easily foundMaterials, not cheap, but easily found

Relatively simple technologyRelatively simple technology

Going to Engineering Camp in Going to Engineering Camp in StonybrookStonybrook

BibliographyBibliography http://www.car-videos.net/articles/horsepower_torque.asphttp://www.car-videos.net/articles/horsepower_torque.asp   Turning green; Ogando, Joseph Turning green; Ogando, Joseph

Design News   10-02-2000 Design News   10-02-2000 http://elibrary.bigchalk.com/libweb/curriculum/do/document?http://elibrary.bigchalk.com/libweb/curriculum/do/document?set=search&groupid=1&requestid=lib_standard&resultid=8&editionset=search&groupid=1&requestid=lib_standard&resultid=8&edition=&ts=E571FDB2E5B4722B3D0B0FB4AECD384B_1242367572667&s=&ts=E571FDB2E5B4722B3D0B0FB4AECD384B_1242367572667&start=1&urn=urn%3Abigchalk%3AUS%3BBCLib%3Bdocumenttart=1&urn=urn%3Abigchalk%3AUS%3BBCLib%3Bdocument%3B86741038%3B86741038

Shifting for fuel economy BY SEAN KILCARR, SENIOR EDITORShifting for fuel economy BY SEAN KILCARR, SENIOR EDITORFleet Owner 02-01-2006 Fleet Owner 02-01-2006 http://elibrary3.bigchalk.com/elibweb/curriculum/do/document?http://elibrary3.bigchalk.com/elibweb/curriculum/do/document?set=search&secondaryNav=&groupid=1&requestid=lib_standard&rset=search&secondaryNav=&groupid=1&requestid=lib_standard&resultid=18&edition=&ts=3B13AB671BD2C56F9CAD2AD675F8519Besultid=18&edition=&ts=3B13AB671BD2C56F9CAD2AD675F8519B_1242367609222&start=1&publicationId=&urn=urn%3Abigchalk_1242367609222&start=1&publicationId=&urn=urn%3Abigchalk%3AUS%3BBCLib%3Bdocument%3B118315934%3AUS%3BBCLib%3Bdocument%3B118315934

Regenerative Braking System Michael Resciniti Adi Peshkess Peter Regenerative Braking System Michael Resciniti Adi Peshkess Peter Leonard Leonard http://designscience.umich.edu/pdf%20files/APD-2003-04.pdfhttp://designscience.umich.edu/pdf%20files/APD-2003-04.pdf

Kinetic energy system Kinetic energy system http://www3.ntu.edu.sg/eee/news/FTF/FTF_Design_Challenge.pdfhttp://www3.ntu.edu.sg/eee/news/FTF/FTF_Design_Challenge.pdf

http://www.google.com/search?hl=en&lr=&q=springs+regenerative+brake+bicycle+filetype%3Apdf&btnG=Searchhttp://www.google.com/search?hl=en&lr=&q=springs+regenerative+brake+bicycle+filetype%3Apdf&btnG=Search