Electric damper

Details Electric damper Electric damper

2009-03-03

2011-10-25

Dickson, Paul N (Department: 3616)

Land vehicles

Suspension modification enacted during travel

Suspension stiffness for ride comfort

C701S037000, C188S266100

Reexamination Certificate

active

08042818

ABSTRACT:
An electric damper which does not transmit unbalance wheel vibration to a vehicle body is provided. A low-pass cutoff frequency setting unit and a high-pass cutoff frequency setting unit respectively set the cutoff frequencies for band-stop filters to a frequency band corresponding to unbalance wheel vibration based on a signal indicating a vehicle speed from a vehicle speed sensor, and a function as a band-stop filter comprising a low-pass filter computation unit, a high-pass filter computation unit and an adder is computed for a displacement rate of the vertical motion of a wheel calculated by a differentiating unit in a damper control unit. A damper control amount computation unit calculates a control amount of controlling an electric motor for a motor-driven damper based on the calculated filtered displacement rate, and outputs a control signal to a motor driving unit through a driving circuit output unit.

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Machine Translation of Inoue et al. JP 2007168685 A (which was cited by Applicant in Feb. 4, 2010 IDS).

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