Suspension

The suspension is everthing between the wheels and the frame. The properties of the suspension determine how the vehicle's steering works.

The wheel is fixed directly onto the hub with four wheel bolts. The hub is supported by the uprights, which are fixed to the chassis with carbon sleeves. The suspension provides all transmission from the car to the ground. The force from the ground goes up in the tire, through the upright and the frame. The forces from the engine goes to the hub via a shaft, which apply great force to the hub. This makes it important to design the hub as strongly as possible, without weighing too much. Low weight is particularly important for the hub as it rotates with the wheel, creating a moment of inertia. This means that there is more mass to be rotated around the axle, and thus require more effort to accelerate.

We also design the uprights ourselves. Here we must take into account the force to be transmitted to the hub. To achieve a construction that is as rigid as possible, we have started with the mechanics beam theory so that we get maximum constant tension. This gives a light but strong construction. One of the vehicles many sensors are attached in the uprights. This measures the speed by using a magnet that counts the number of wheel rotations per minute. By logging rotation speed of more wheels, more data can be retrieved on driving.

The location of the carbon arms and dampers are determined primarily by the vehicle's desired characteristics (such as roll center, power distribution, length, camber gain), as well as limitations of frame and engine. We must take into account the acceleration, braking, cornering, weight and essentially all other specifications. It is therefore a demanding job that requires close cooperation between all participants in our project.

The brake discs are attached to the hub and therefore contribute to increased moment of inertia. Because of this we dimension the discs as low as possible - without compromising the braking force. We have designed this year's brake discs with many holes in the friction area. This is to continuously grind the brake pads and thus prevent the formation of a friction-reducing coating.

The pedal box in this year's car is designed with great attention to trusses. This is a technique that is well suited for light and rigid constructions, making the pedal box very suitable for a racing car!

 

 

 

 

English