Here's a little more info that I found as I'm getting ready to install a set (courtesy of the Googs translator (not much, but the picture is becoming clearer).) Waiting on camber plates and an appointment window at my favorite alignment shop.
https://translate.google.com/transla...-text=&act=url
Aim of development
It was possible to vary the damping force without resorting to electronic control and aimed at achieving both ride comfort and steering stability of the vehicle under various circumstances.
Technical features, superiority
Generally, the variable damper electronically changes the damping force by sensing the vehicle condition such as the suspension working stroke of the suspension, SFRD adopts a frequency response type damping force adjustment structure that can handle high frequencies , The frequency of the road surface is automatically determined mechanically and the damping force is varied smoothly.
By doing this, it operates smoothly on a rough road surface and firmly stepping on a corner, so that the ride comfort and steering stability of the vehicle are compatible under various circumstances.