Method of operating an active suspension

US9868333B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Christoph Göhrle · Ingolstadt, DE
• Andreas Unger · Garching bei München, DE

Key dates

• Filing date: Jul 24, 2015
• Grant date: Jan 16, 2018
• Expiry date: Jul 28, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2500/104
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In a method of operating an active suspension of a motor vehicle, power is added to at least one active control element of the active suspension, arranged between a wheel and a body, for damping a movement of the motor vehicle in a vertical direction when negotiating a terrain to thereby influence at least one control variable of the suspension, which control variable is oriented in the vertical direction. A first signal of a velocity of the body in the vertical direction and a second signal of the at least one control variable are determined. After ascertaining a phase shift between the first and second signals, a value of the phase shift is compared with a predefined threshold value. The presence of excitation is identified for the vertical body movement, when the value of the phase shift deviates from the threshold value at least by a tolerance value.