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

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

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.

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.

Motivation

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.

Design - Paddles

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

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

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

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 9.940092 8.84152 17.67128 15.7078 60 14.91014 13.26228 26.50691 23.5617 80 19.88018 17.68304 35.34255 31.4156 100 24.85023 22.1038 44.17819 39.2695 120 29.82028 26.52456 53.01383 47.1234 140 34.79032 30.94532 61.84946 54.9773

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

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 Property—Durometer Hardness TBD – Flow Regulator, Fluid Reservoir (9, 12, 20 oz tanks)

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

Initial Cost Analysis Part Cost (usd $) Qauntitiy Total (usd $) Pnuematic Cylinder 30 1 Rubber Tubing (Bundle) 20 Solenoid 2 60 Regulator Tank Microcontroller 162

Conclusion Problem Statement Motivation / Objectives Design Intent Initial Cost Analysis

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