Arrangement for control of a chassis vibration damping device

US5721681A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Udo Borschert · Schweinfurt, DE
• Thomas Kutsche · Schweinfurt, DE

Key dates

• Filing date: Apr 28, 1995
• Grant date: Feb 24, 1998
• Expiry date: Apr 28, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2600/70
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

For control of a frame-vibration damping device with a variable damping force characteristic in a motor vehicle (1), adjustment devices (9) of the vibration dampers (7) being controlled as a function of evaluated measurement signals of a single acceleration sensor (17) detecting the instantaneous value of an acceleration variable. The measurement direction (19) of the acceleration sensor (17) is turned at an angle of 45.degree. in each case to the three axes of motion of the vehicle (longitudinal axis x, transverse axis y, and vertical axis z). Signal separation means (25) separate a first measurement signal component (b.sub.z) by means of a bandpass filter (31) with midfrequency tuned to the natural frequency of the vehicle body (3), which represents the acceleration component in the vertical direction (z). Subtraction means (33), which develop the difference of the measurement signal of the acceleration sensor (17) and the first measurement signal component (b.sub.z), deliver a second measurement signal component (b.sub.xy) for the acceleration component in the plane of the longitudinal axis x and the transverse axis y. Evaluation means (35, 37) associated with the two measuremen…