KAR Quick Shift for FSAE Vehicle

EML 4551Kai Vecchio

Andrew SauerRobert 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 3/4Working Pressures(PSI)

Thrust Pull lbf Thrust Pull

40 9.940092 8.84152 17.67128 15.707860 14.91014 13.26228 26.50691 23.561780 19.88018 17.68304 35.34255 31.4156100 24.85023 22.1038 44.17819 39.2695120 29.82028 26.52456 53.01383 47.1234140 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 30Rubber Tubing (Bundle) 20 1 20Solenoid 30 2 60Regulator 30 1 30Tank 20 1 20Microcontroller 2 1 2

162

Conclusion

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

Gantt ChartTable 1: Gantt Chart for KAR Quick Shift System

Feb Mar Apr May Jun July Aug Sept Oct Nov Dec

Team Selection

Project Selection

Literature Survey

Conceptual DesignDevelopment

Begin Design Development

Analysis of Design

Prototype Construction

Testing and Evaluation

Conclusion