Spring Strut

Spring Strut









TASK
The spring strut is a partially supporting suspension component and ensures the level control of the vehicle hydraulically
It raises the vehicle and lowers it
It also performs the damper function together with the spring actuator.

LOCATION
On the front axle the bottom of the spring strut (11) is secured to the steering knuckle and the top of the spring strut is secured to the spring dome of the frame floor
On the rear axle the bottom of the spring strut (5) is secured to the spring link and the top of the spring strut is secured to the spring dome of the frame floor

FUNCTION






The vehicle level is raised/lowered by the oil quantity control in the oil chamber of the spring components which shortens/extends the spring struts

As the spring strut/front axle (A) is also used as a wheel location system part, additional guide friction occurs in the spring strut seal in addition to the sealing friction
In order to minimize the sealing friction, the sealing of the spring strut is divided up into a high-pressure and low-pressure seal
The quantity of leakage oil flowing through the high-pressure seal is led back to the oil reservoir via the leak oil/return line (LL)