Some of the latest Cadillac products, such as the CT4-V, CT5-V and Escalade, come with the automaker’s fourth-generation Magnetic Ride Control (MRC) dampers. We already know General Motors‘ MRC dampers improve steering responsiveness and help isolate the vehicle from bumps and imperfections in the road, but how exactly does MRC 4.0 differ from the outgoing, third-generation version of the system?
Before we can answer that, let’s take a closer look at the basic technology behind the MRC dampers. As GM explains, MRC is an active damping system “that uses electromagnets paired with magnetorheological fluid within the shock absorbers to continually vary their damping rate.” Accelerometers in the suspension help to read the road, which triggers the computer to make changes to the magnetic charge within the fluid, instantly altering the damping rates of the shocks based on the conditions. The shocks improve the ride quality and the handling, as well, as the damping rates can affect tire contact patch when making sharp or high-speed turns.
Nearly every aspect of MRC 3.0 was reevaluated for the development MRC 4.0, the automaker says, including the accelerometer sensors, controller hardware, vehicle tuning and the dampers themselves. Some of the most notable changes include:
- New wheel hub accelerometers that provide additional fluid and natural-feeling damping changes. These sensors are four times more responsive than the ones used in MRC 3.0.
- The addition of an inertial measurement unit, which “provides more precise measurements of body motion, relative to the wheel, for more accurate readings under heavy braking, hard cornering and other driving conditions,” Cadillac says.
- New secondary temperature maps, which enable engineers to compensate for changes in damper fluid temperature, contributing to more consistent damper performance – particularly during performance driving when the damper fluid may be under more stress and strain.
- Addition of a magnetic flux control unit, which “creates a more consistent and more accurate transition between rebound and compression in the dampers, improving the system’s ability to sense and control vehicle body movement.”
- Less damper friction, which has enabled engineers to tune for “more pronounced differences between drive modes.”
- Various upgrades to hardware and software that allow the vehicle to remain more level as it transitions between corners.
- New magnetorheological fluid formula reduces friction within the damper to contribute to smoother overall suspension damping.
“With MagneRide 4.0, the world’s fastest reacting suspension system is now even faster,” said Cadillac performance engineer Thomas Schinderle. “When paired with our sedans’ award-winning rear-wheel-drive architecture, the result is two of the most responsive sport sedans on the market, with reflexes that elevate the already high threshold of the V-Series legacy.”
The 2021 Cadillac CT4-V and 2021 Cadillac CT5-V both come standard with the latest, fourth-generation Magnetic Ride Control system. The 2021 Cadillac Escalade Sport and Platinum models come standard with MRC 4.0, as well. It’s likely the next-generation system will continue to trickle throughout the GM range, but Cadillac vehicles are first to receive due to their higher price points and luxury status.