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

• US 5,009,450 A
• Filed: 03/05/1990
• Issued: 04/23/1991
• Est. Priority Date: 03/21/1989
• Status: Expired due to Term

• Current Assignee: August Bilstein GmbH & Co. KG
• Original Assignee: August Bilstein GmbH & Co. KG
• Inventors: Gesenhues, Ludger, Hoscher, Reinhard, Huang, Zhen, Hoffmann, Hans-Jurgen, Herberg, Gerhard
• Primary Examiner(s): Rice, Kenneth R.
• Application Number:
  US07/488,703
• Time in Patent Office: 414 Days
• Field of Search: 280/707
• US Class Current: 188/266.1
• CPC Class Codes: B60G 17/01933 Velocity, e.g. relative velocity-displacement sensors
• CPC Class Codes: B60G 2204/112 on dampers, e.g. fluid dampers
• CPC Class Codes: B60G 2400/206 Body oscillation speed; Body vibration frequency
• CPC Class Codes: B60G 2500/10 Damping action or damper
• CPC Class Codes: B60G 2600/04 Means for informing, instructing or displaying
• CPC Class Codes: B60G 2600/24 permanent magnets
• CPC Class Codes: G01P 3/52 by measuring amplitude of generated current or voltage

Abstract

The invention concerns a vibration-absorber sensor for the semi-actively controlled chassis of a motor vehicle wherein the relative velocity of the wheel mass to the body mass is measured with a sensor winding and a permanent magnet and processed in a circuit.

Claims

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.

2. A vibration-absorber sensor as defined in claim 1, wherein said sensor winding is embedded in plastic and comprises said housing.

3. A vibration-absorber sensor as defined in claim 1, wherein said sensor winding is embedded in rubber and comprises said housing.

4. A vibration-absorber sensor as defined in claim 1, wherein said sensor winding is embedded in plastic and rubber and comprises said housing.

5. A vibration-absorber sensor as defined in claim 1, wherein said sensor winding is embedded in aluminum and comprises said housing.

6. A vibration-absorber sensor as defined in claim 1, including an anti-magnetic spacer between said magnet and said cap.