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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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Design - Paddles 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.” ¾ cylinder allows more flexibility for pressure loss, design error, etc (Cost difference minimal) Bimba 9/16 Bimba 3/4 Working Pressures(PSI) Thrust Pull lbf 40 60 80 100 120 140
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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 PSI – 220 (F) ASTM D (2010) Standard Test Method for Rubber Property—Durometer 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 Part Cost (usd $) Qauntitiy Total (usd $)
Pnuematic Cylinder 30 1 Rubber Tubing (Bundle) 20 Solenoid 2 60 Regulator Tank Microcontroller 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 Feb Mar
Feb Mar Apr May Jun July Aug Sept Oct Nov Dec 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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