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KAR Quick Shift for FSAE Vehicle EML 4551 Kai Vecchio Andrew Sauer Robert Esperon

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FSAE Paddle Shift System - Problem Statement - Motivation / Objectives - Design Intent - Initial Cost Analysis

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Problem Statement -Traditional Shift Method slow and inefficient in fast paced enviornment. - Design a quick shift system that allows driver to maintain both hands on the steering wheel.

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Motivation -Increased driver concentration and safety. -Better control of the vehicle and faster reaction times. -First for FIU FSAE, and hope to set the standard.

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Motivation

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Objectives -Match the reliability of standard shift lever and clutch pedal set up. -Match the weight of previous shifter set up. -Shift time under 1 second -Cost under $1,000 -Quick, and clean shifts.

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Design - Paddles

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Shows the distance allowable for the paddles Prototype uses a conductive cord or could be modified to use a wire fed design

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Design - Paddles Displays an in depth look at a new design using a snap action lever switch Modified positioning of the paddles and modified the bracket

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Design - Paddles Latest design with a push button switch Renovated paddle and lever bracket Difficulty surrounding positioning of the system

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Design Gear Shift -Pneumatic cylinders to drive gear shift - Double acting cylinder -20lbf required in push or pull direction -Choice of Bimba because Bimba Manufacturing Company is an ISO 9001: 2008 certified company. - cylinder allows more flexibility for pressure loss, design error, etc (Cost difference minimal) Bimba 9/16Bimba 3/4 Working Pressures(PSI) ThrustPulllbfThrustPull 409.9400928.8415217.6712815.7078 6014.9101413.2622826.5069123.5617 8019.8801817.6830435.3425531.4156 10024.8502322.103844.1781939.2695 12029.8202826.5245653.0138347.1234 14034.7903230.9453261.8494654.9773

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Design Gear Shift -Cylinder mounted to reduce risk of piston rod buckling -TBD Clutch Actuation linked to pneumatic assembly or separate electric actuator

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Design Pneumatic Assembly -Solenoids used to control flow - Normally closed 12v rated -Flow through Polyurethane Clear Tubing - (Min.) Durometer 80A Rated - 130 PSI 220 (F) -ASTM D2240 - 05(2010) - Standard Test Method for Rubber PropertyDurometer Hardness -TBD Flow Regulator, Fluid Reservoir (9, 12, 20 oz tanks)

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Design Closed Circuit -12v supply from vehicle -Microcontroller to send signal to solenoid after receiving signal from driver (Arduino, PIC, TI) -Transistor between microcontroller and solenoids

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Initial Cost Analysis PartCost (usd $)QauntitiyTotal (usd $) Pnuematic Cylinder301 Rubber Tubing (Bundle)201 Solenoid30260 Regulator301 Tank201 Microcontroller212 162

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Conclusion - Problem Statement - Motivation / Objectives - Design Intent - Initial Cost Analysis

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Gantt Chart Table 1: Gantt Chart for KAR Quick Shift System FebMarAprMayJunJulyAugSeptOctNovDec Team Selection Project Selection Literature Survey Conceptual Design Development Begin Design Development Analysis of Design Prototype Construction Testing and Evaluation Conclusion

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