soft-spring suspension system
Quick Summary
A soft-spring suspension system is a component of an automobile designed to cushion the impact of road irregularities. It connects the vehicle's tires to its suspended body using elastic members, typically springs and shock absorbers.1
Mechanics of Soft Springs
Soft springs have a low spring rate, meaning they deflect a greater distance under a given load. While this provides a comfortable ride on smooth roads, it can lead to excessive bouncing on rough surfaces. A significant challenge with soft springs is providing adequate clearance between the vehicle's sprung and unsprung portions. Additionally, softer suspensions can worsen handling issues like "sway" or "roll" during turns, as the outer springs compress and inner springs expand more noticeably.2
Various spring elements are used, including leaf springs, coil springs, torsion bars, rubber-in-shear devices, and air springs. Air springs offer the advantage of a controllable spring rate, becoming progressively stiffer as they are compressed. Some advanced systems use a combination of hydraulic fluid and air, or even active suspensions with microprocessors to adjust damping.23
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