Vibration-absorber sensor for a semi-actively controlled chasis with a relative-velocity sensor and with electronics for processing their outputs

Claim 1

A vibration-absorber sensor for measuring relative velocity between a motor vehicle body and axle, comprising: a wheel suspension; a variable or controllable hydraulic vibration absorber having an absorber cylinder at one end connected to said wheel suspension, said hydraulic vibration absorber having a moving piston rod at another end connected to said body and traveling in and out of said cylinder; a stationary housing open at one end and matching the shape of said cylinder and forced over said cylinder, said housing secured to said piston rod; an absorption valve and a processing circuit connected to said valve for varying or controlling said valve; said housing being made of anti-magnetic material and accommodating a sensor winding with leads extending outward; a magnet positioned at an untensioned end of said cylinder and on the surface of a cap of said cylinder; velocities of said piston including a distance-dependent and direction-dependent voltage signal in said sensor winding; said processing circuit supplying a signal for varying or controlling the absorption valve in accordance with the particular relative velocity of the piston.