Title

Electrical Vehicle Clutch Project

Document Type

Creative works or constructive object presentation

Campus where you would like to present

Ellensburg

Event Website

https://digitalcommons.cwu.edu/source

Start Date

18-5-2020

Abstract

This project’s goal was to add a clutch system to an electrical vehicle at Central Washington University. The project’s second goal was to have the clutch system improve the electrical vehicle’s fuel economy for Electrathon events. Electrathon uses an equivalent mpg formula to determine an electrical vehicle’s “fuel economy.” Based on the amount of energy in kilo-Watt hours in a gallon of gas, Electrathon assumes each car uses 0.026 gallons of “gas” in the hour long race and the mpg value given to an electrical vehicle is based on the distance the vehicle travels in the race. Analyzes and problem solving showed that only a lightweight clutch system was going to effectively increase the fuel economy of the small electrical vehicle. A one-way clutch was purchased. Then a hub was manufactured, and the clutch was pressed into the middle of the hub, then screws held the clutch system up against a sprocket on the driven shaft. This clutch system allowed the electric motor to drive the vehicle forward. When power is no longer being delivered from the motor, the clutch system allows the vehicle to “coast” forward. This idea of covering more distance with the same amount of input energy is what makes the addition of a one-way clutch system so useful. The clutch system proved to add as much as 5 mpg (6% increase) to the electrical vehicle’s fuel economy. In a full speed test, the vehicle coasted 48 more feet on average when the clutch system was equipped.

Faculty Mentor(s)

Charles Pringle

Department/Program

Engineering, Technologies, Safety & Construction

Additional Mentoring Department

https://cwu.studentopportunitycenter.com/2020/04/electrical-vehicle-clutch-project/

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May 18th, 12:00 PM

Electrical Vehicle Clutch Project

Ellensburg

This project’s goal was to add a clutch system to an electrical vehicle at Central Washington University. The project’s second goal was to have the clutch system improve the electrical vehicle’s fuel economy for Electrathon events. Electrathon uses an equivalent mpg formula to determine an electrical vehicle’s “fuel economy.” Based on the amount of energy in kilo-Watt hours in a gallon of gas, Electrathon assumes each car uses 0.026 gallons of “gas” in the hour long race and the mpg value given to an electrical vehicle is based on the distance the vehicle travels in the race. Analyzes and problem solving showed that only a lightweight clutch system was going to effectively increase the fuel economy of the small electrical vehicle. A one-way clutch was purchased. Then a hub was manufactured, and the clutch was pressed into the middle of the hub, then screws held the clutch system up against a sprocket on the driven shaft. This clutch system allowed the electric motor to drive the vehicle forward. When power is no longer being delivered from the motor, the clutch system allows the vehicle to “coast” forward. This idea of covering more distance with the same amount of input energy is what makes the addition of a one-way clutch system so useful. The clutch system proved to add as much as 5 mpg (6% increase) to the electrical vehicle’s fuel economy. In a full speed test, the vehicle coasted 48 more feet on average when the clutch system was equipped.

https://digitalcommons.cwu.edu/source/2020/CEPS/50