pitkittäisjousitus

Pitkittäisjousitus is a Finnish term referring to a type of suspension system, specifically a trailing arm suspension. In this configuration, the suspension arms are pivoted at one end and connected to the wheel hub at the other. The arms extend rearward or forward from the pivot point, hence the term "pitkittäis" meaning longitudinal or lengthwise.

The primary characteristic of pitkittäisjousitus is that the wheels move in an arc as the suspension compresses and rebounds. This arc motion is determined by the length of the trailing arm and the location of its pivot. Compared to some other suspension designs, trailing arm suspensions can offer good stability and a relatively simple construction. They are often found in rear-wheel-drive vehicles, particularly in the rear suspension.

Advantages of this system can include good packaging efficiency, allowing for more interior or cargo space. They also tend to isolate the cabin from road imperfections effectively, contributing to a comfortable ride. However, the inherent arc motion can sometimes lead to undesirable changes in wheel alignment (like camber and toe) during suspension travel, which might affect handling characteristics, especially under aggressive driving conditions. Despite these potential drawbacks, pitkittäisjousitus remains a common and effective suspension solution in various automotive applications due to its balance of simplicity, cost-effectiveness, and comfort.