What is a dual rate coil spring and how does it work?

A dual rate coil spring is a type of spring that is used in the suspension of some vehicles. It is called a “dual rate” spring because it has two different spring rates, or stiffness levels. The spring rate is the amount of force required to compress the spring a certain distance, and a dual rate coil spring has one spring rate for the first part of its compression and a different spring rate for the second part of its compression.

Dual rate coil springs are typically used in vehicle suspension systems that need to provide a comfortable ride under normal driving conditions, but also need to be able to handle higher loads or more extreme driving conditions. The dual rate design allows the spring to provide a comfortable ride when it is not heavily loaded, but to stiffen up when the vehicle encounters heavier loads or more extreme conditions. This can improve the vehicle’s handling and performance in a variety of driving situations.

Dual rate coil springs are commonly used in off-road vehicles and other vehicles that are designed to handle rough terrain or heavy loads. They are also used in some high-performance vehicles, where the dual rate design can improve the vehicle’s handling and performance under a variety of driving conditions.