Method and apparatus for controlling damping of a vehicle suspension
First Claim
1. Article of manufacture, comprising a storage medium having a computer algorithm encoded therein for effecting a method to control damping of a suspended body using a plurality of controllable suspension dampers, the algorithm comprising:
- code to determine vehicle forward velocity;
code to monitor input from a modal sensing system;
code to determine parameters for heave, pitch, and roll, based upon the input from the modal sensing system;
code to determine a common damping rate for the controllable suspension dampers based upon the vehicle forward velocity and the determined parameters for heave, pitch, and roll; and
,code to control operation of each of the controllable suspension dampers based upon the common damping rate adjusted based upon a location of each of the controllable suspension dampers.
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Accused Products
Abstract
A method and algorithm for semi-active suspension damper control is described. The algorithm controls the damper setting to limit vehicle body movement in terms of body modal velocities of heave, roll and pitch. The main input, body movement, is measured with accelerometers. The control output comprises a request in percent of damper control range. Vehicle speed-dependent minimum and maximum limits are applied. The method includes monitoring vehicle speed and a modal sensing system. A common damping rate for the dampers is determined based upon parameters for speed, heave, pitch, and roll. Each damper is controlled based upon the common damping rate adjusted based upon a location of each of the controllable suspension dampers. The output comprises a single signal, translated to a front and rear setting. The purpose is to always have a balanced setting of the four dampers.
64 Citations
27 Claims
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1. Article of manufacture, comprising a storage medium having a computer algorithm encoded therein for effecting a method to control damping of a suspended body using a plurality of controllable suspension dampers, the algorithm comprising:
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code to determine vehicle forward velocity; code to monitor input from a modal sensing system; code to determine parameters for heave, pitch, and roll, based upon the input from the modal sensing system; code to determine a common damping rate for the controllable suspension dampers based upon the vehicle forward velocity and the determined parameters for heave, pitch, and roll; and
,code to control operation of each of the controllable suspension dampers based upon the common damping rate adjusted based upon a location of each of the controllable suspension dampers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Article of manufacture, comprising a storage medium having a computer algorithm encoded therein for effecting a method to control damping rate of a controllable suspension damper operable to dampen movement between a vehicle chassis and a wheel, the algorithm comprising:
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code to determine vehicle forward velocity; code to monitor input from a modal sensing system; code to determine parameters for heave, pitch, and roll, based upon the input from the modal sensing system; code to determine a common damping rate for the controllable suspension damper based upon the vehicle forward velocity and the determined parameters for heave, pitch, and roll; and
,code to control operation of the controllable suspension damper based upon the common damping rate adjusted based upon a location of the controllable suspension damper.
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17. Method to control damping of a vehicle body using a plurality of controllable suspension dampers, comprising:
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determining vehicle forward velocity; monitoring input from a modal sensing system; determining parameters for heave, pitch, and roll, based upon the input from the modal sensing system; determining a common damping rate for the controllable suspension dampers based upon the vehicle forward velocity and the determined parameters for heave, pitch, and roll; and
,controlling operation of each of the controllable suspension dampers based upon the common damping rate adjusted based upon a location of each of the controllable suspension dampers. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. Method to control suspension damping in a vehicle having a plurality of controllable suspension dampers and an acceleration sensing device, comprising:
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monitoring a vehicle forward speed and a steering wheel angle; determining parameters for vehicle heave, vehicle pitch, and vehicle roll, based upon input from the acceleration sensing device; and
,simultaneously controlling each of the controllable suspension dampers based upon vehicle forward speed, steering wheel angle, and the determined parameters for vehicle heave, vehicle pitch, and vehicle roll.
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Specification