GM is developing adaptive springs for suspension systems

A recently surfaced patent application shows that General Motors is considering applying the technology, from adaptive shock absorbers to springs, for future suspension systems.

GM was a pioneer magnetorheological dampersThose that use a magnetic fluid to quickly change the firmness of the damper. In a patent application published by the United States Patent and Trademark Office (USPTO) on November 7, 2024 and filed by GM on May 5, 2023, the automaker said magnetorheological springs additionally.

General Motors adaptive spring patent image

Magnetorheology works by using magnets to adjust the viscosity, which occurs when metallic particles in the fluid respond to a magnetic field. This is currently used to toggle between hard and soft settings on shock absorbers, but GM discusses using it to adjust spring rates in the document. emphasize performance or ride comfort as required.

The design in the patent application includes two separate springs with a central seat between them. The seat will have an outer shell containing magnetorheological fluid along with electromagnets. When the magnets are energized, the liquid thickens and prevents the movement of the springs. De-energizing the magnets allows more spring movement and therefore more suspension movement.

General Motors adaptive spring patent image

Not all of the patented ideas make it into production, but it doesn’t take much imagination to imagine adaptable springs integrating with future versions. MagneRide damping system It is used in current GM models.

No similar patent applications from other automakers have surfaced recently, but it looks like Ford work on position sensitive dampers be a rival Multimatic DSSV (Dynamic Suspension Spool Valve) used in shock absorbers Chevrolet Colorado ZR2 and other GM off-road trucks.