Faculty Advisor

Ault, Holly Keyes


With greater energy storage and power density than electric or hydraulic systems, a flywheel kinetic energy recovery system may be a solution for increasing efficiency in passenger vehicles. A Switch Mode Continuously Variable Transmission connects a high-speed flywheel to the drivetrain with a high-speed clutch. The goal of this project was to control the clutch’s high-speed duty cycle with improved efficiency, wear, and reliability than previous systems. The design uses an eccentric cam to drive a set of linear cams at high speed to engage the clutch. Each translating roller follower has an internal spring system to output the desired clamping force. Duty cycle is varied by changing the position of the eccentric camshaft. The device shows significant improvement over previous work.


Worcester Polytechnic Institute

Date Accepted

April 2015


Mechanical Engineering

Project Type

Major Qualifying Project



Advisor Department

Mechanical Engineering

Your accessibility may vary due to other restrictions.