Teams get a lot of freedom to design their own car. The most important rules a Formula
student car has to comply with state that it has to have:
• a chassis that is designed in accordance with a number of safety regulations.
• a four-stroke engine with a maximum displacement of 610 cc.
• an inlet restriction with a maximum diameter of 20 mm.
• a fully operational suspension system.
For the 2009-2010 season, URE started building their sixth car: the URE06. Besides
that, it’s predecessor, the URE05 (see figure 1.1), will be converted from petrol driven to
full electric. It will be used to compete in new the Formula Student Electric competition.
The URE06 will be equipped with a newly designed front and rear multi-link wheel
suspension. The rear frame that holds the powertrain, drivetrain and suspension will be
shortened to reduce total mass and yaw inertia of the car. A new spring-damper system
has to be designed to make this possible.
The main subject of this report is the design of a spring-damper system for the URE06.
Chapter 2 explains the working principle of a suspension system and lists the requirements
the spring-damper system has to fulfill. The mechanical design of the spring-damper
systems for the front and rear of the car will be discussed in chapters 3 and 4 respectively