Controlling a vehicle damper and differentiating between wheel and body events
First Claim
1. A method for differentiating between a wheel event and a body event in a control algorithm for a controllable suspension damper for a vehicle wheel comprising the steps of:
- a) obtaining an input signal corresponding to the vertical velocity of the vehicle wheel;
b) filtering the input signal with a filter to obtain an output signal;
c) determining the frequency of the input signal using the input and output signals; and
d) distinguishing between a wheel event and a body event using the determined frequency.
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Accused Products
Abstract
A first method for differentiating between a wheel event and a body event in a control algorithm for a controllable suspension damper for a vehicle wheel. An input signal corresponding to the vertical velocity of the vehicle wheel is obtained. The input signal is filtered to obtain an output signal. The frequency of the input signal is determined using the input and output signals. Another step includes distinguishing between a wheel event and a body event using the determined frequency. A second method for controlling a controllable suspension damper for a vehicle wheel includes the first three steps of the first method. Another step includes applying a vehicle-wheel-event control signal to the controllable suspension damper for at least some determined frequencies greater than a predetermined low value. Another step includes applying no vehicle-wheel-event control signal to the controllable suspension damper if the determined frequency is below the predetermined low value.
8 Citations
20 Claims
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1. A method for differentiating between a wheel event and a body event in a control algorithm for a controllable suspension damper for a vehicle wheel comprising the steps of:
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a) obtaining an input signal corresponding to the vertical velocity of the vehicle wheel;
b) filtering the input signal with a filter to obtain an output signal;
c) determining the frequency of the input signal using the input and output signals; and
d) distinguishing between a wheel event and a body event using the determined frequency. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling a controllable suspension damper for a vehicle wheel comprising the steps of:
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a) obtaining an input signal corresponding to the vertical velocity of the vehicle wheel;
b) filtering the input signal with a filter to obtain an output signal;
c) determining the frequency of the input signal using the input and output signals;
d) applying a vehicle-wheel-event control signal to the controllable suspension damper for at least some determined frequencies greater than a predetermined low value; and
e) applying no vehicle-wheel-event control signal to the controllable suspension damper if the determined frequency is below the predetermined low value, wherein the predetermined low value differentiates between a vehicle wheel event and a vehicle body event. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for controlling a magnetorheological suspension damper for a vehicle wheel comprising the steps of:
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a) obtaining an input signal corresponding to the vertical velocity of the vehicle wheel;
b) filtering the input signal with a lead-lag filter to obtain an output signal;
c) determining the frequency of the input signal using the magnitudes of the input and output signals;
d) applying a vehicle-wheel-event control signal to the magnetorheological suspension damper for at least some determined frequencies greater than a predetermined low value; and
e) applying no vehicle-wheel-event control signal to the magnetorheological suspension damper if the determined frequency is below the predetermined low value, wherein the predetermined low value differentiates between a vehicle wheel event and a vehicle body event.
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Specification