Electronic controlled fluid suspension system
First Claim
1. An electronic controlled fluid suspension system for a vehicle to reduce diving during braking and squatting during acceleration comprising:
- a fluid suspension (M2) provided for a wheel (M1) of the vehicle;
flow control means (M3) for controlling fluid flow to and form the fluid suspension (M2) based on a control parameter;
acceleration detection means (M4) for detecting longitudinal acceleration of the vehicle;
difference calculation means (M5) for calculating a difference between a maximum value and a minimum value of detected longitudinal acceleration during a predetermined time interval; and
attitude control means (M6) for generating the control parameter based on the difference calculated in the difference calculation means (M5) so as to cause a longitudinal attitude of the vehicle to approach a predetermined optimum target attitude that is lower at both a front part and a rear part of the vehicle than an original attitude.
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Accused Products
Abstract
An electronic fluid suspension system having longitudinal acceleration sensor, acceleration difference calculation means and vehicle attitude control means in addition to other fluid flow control components known in the conventional suspension system. In this system, the vehicle attitude is controlled responsive to the difference between a maximum acceleration and a minimum acceleration detected within a predetermined time interval. When dive or squat of the vehicle body is anticipated by the difference, vehicle attitude control is performed, without inappropriately responding to a momentary change in the acceleration. After the vehicle attitude control, a return control is performed to restore the original attitude and, further, a vehicle attitude correction control is performed responsive to a difference in actual front/rear heights and corresponding original heights.
44 Citations
14 Claims
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1. An electronic controlled fluid suspension system for a vehicle to reduce diving during braking and squatting during acceleration comprising:
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a fluid suspension (M2) provided for a wheel (M1) of the vehicle; flow control means (M3) for controlling fluid flow to and form the fluid suspension (M2) based on a control parameter; acceleration detection means (M4) for detecting longitudinal acceleration of the vehicle; difference calculation means (M5) for calculating a difference between a maximum value and a minimum value of detected longitudinal acceleration during a predetermined time interval; and attitude control means (M6) for generating the control parameter based on the difference calculated in the difference calculation means (M5) so as to cause a longitudinal attitude of the vehicle to approach a predetermined optimum target attitude that is lower at both a front part and a rear part of the vehicle than an original attitude. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an electronically-controlled fluid suspension system for a vehicle having a fluid suspension provided for a wheel of the vehicle and flow control means for controlling fluid flow to and from the fluid suspension as a function of a control parameter, the improvement to reduce diving during braking and squatting during acceleration comprising:
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acceleration detection means for detecting longitudinal acceleration and deceleration of the vehicle; difference calculation means for calculating a difference between a maximum value and a minimum value of detected longitudinal acceleration occurring during a predetermined time interval; and
,attitude control means for generating the control parameter as a function of the difference calculated in the difference calculation means so as to cause longitudinal attitude of the vehicle to approach a predetermined optimum target attitude that is below an original attitude at both a front part and a rear part of the vehicle. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification