tvårörsdämpare

Tvårörsdämpare, also known as twin-tube shock absorbers, are a type of hydraulic suspension component commonly found in vehicles. They function by using a piston moving within a cylinder filled with hydraulic fluid to dissipate energy from the suspension's movement. This energy dissipation controls the rate at which the suspension compresses and rebounds, thereby moderating the vehicle's ride and handling characteristics.

The twin-tube design consists of two concentric tubes. The outer tube acts as a reservoir for hydraulic fluid and also houses the main working cylinder. Inside this outer tube is an inner, smaller tube which contains the piston and rod assembly. As the suspension moves, the piston forces fluid through small orifices, creating resistance. The twin-tube construction allows for a simpler and often more cost-effective manufacturing process compared to some other damper designs.

The primary role of a tvårörsdämpare is to dampen oscillations in the vehicle's springs, preventing excessive bouncing and maintaining tire contact with the road surface. This contributes to ride comfort by smoothing out road imperfections and enhances stability, especially during cornering and braking. The amount of damping can be varied by adjusting the size and number of orifices within the piston and the viscosity of the hydraulic fluid. While widely used, tvårörsdämpare can be susceptible to foaming or aeration of the fluid under extreme conditions, which can reduce their effectiveness.