Suspension apparatus of a vehicle
First Claim
1. A suspension apparatus of a vehicle, in which each of wheels is provided with an actuator for controlling a height of a vehicle body in accordance with a supply or discharge of an operating fluid and the supply or discharge of the operating fluid to or from the actuator is controlled in accordance with a predetermined condition;
- wherein acceleration in a vertical direction acting upon the vehicle body is used as a control parameter for determining a control value for supplying or discharging the operating fluid; and
wherein three sensor means for sensing the acceleration in the vertical direction are provided so as to define a virtual plane extending in a substantially horizontal direction.
1 Assignment
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Accused Products
Abstract
An actuator for adjusting a height of the vehicle body is provided for each of the wheels and the height of the body is adjusted for each of the wheels by supplying and discharging an operating fluid to and from the actuator. A vehicle-height detecting sensor is also provided on each wheel for detecting the height of the vehicle body and for control over a posture of the body, namely, control over a supply or discharge of the operating liquid to or from the actuator is implemented with respect to bouncing, pitching or rolling of the body on the basis of output from the vehicle-height detecting sensor. Furthermore, a plurality of vertical G sensors for detecting acceleration in a vertical direction are provided to sense bouncing, pitching and rolling components of acceleration in the vertical direction, and the posture control utilizing the vehicle-height sensor is corrected so as not to make the vertical acceleration for the three components larger. Three vertical G sensors are provided so as to define a virtual plane representing the body, and that, for instance, two of the three vertical G sensors are disposed on the front portion of the body at positions bilaterally symmetrical to each other and one thereof is disposed on the rear portion thereof at a middle position, thereby allowing the three vertical G sensors to enable a detection of the acceleration in the vertical direction with respect to the bouncing, pitching and rolling components.
25 Citations
33 Claims
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1. A suspension apparatus of a vehicle, in which each of wheels is provided with an actuator for controlling a height of a vehicle body in accordance with a supply or discharge of an operating fluid and the supply or discharge of the operating fluid to or from the actuator is controlled in accordance with a predetermined condition;
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wherein acceleration in a vertical direction acting upon the vehicle body is used as a control parameter for determining a control value for supplying or discharging the operating fluid; and wherein three sensor means for sensing the acceleration in the vertical direction are provided so as to define a virtual plane extending in a substantially horizontal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A suspension apparatus comprising:
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a cylinder unit interposed between an unsprung weight and a sprang weight for each of wheels for controlling a height of a vehicle body in accordance with a supply or discharge of an operating fluid comprising an incompressible fluid; a flow rate control valve for independently controlling a flow rate for supplying or discharging the operating fluid to or from the cylinder unit; vehicle-height detecting means associated with each of the wheels for detecting a height of the vehicle body; first control means for controlling the flow rate control valve in response to output from the vehicle-height detecting means so as to allow a posture of the body corresponding to three component modes including a bouncing component mode, a pitching component mode and a rolling component mode to take a posture satisfying a predetermined condition; sensor means for detecting acceleration in a vertical direction acting upon the body; and second control means for controlling the flow rate control valve to regulate a displacement movement of the body in response to output from the sensor means; wherein the sensor means comprises three sensor means, two of which are disposed on a front portion of the body at positions substantially bilaterally symmetrical with respect to a longitudinally central line of the body; and
the rest of which is disposed on a rear portion of the body at a position substantially middle in a transverse direction of the body, the three sensor means defining a virtual plane representing the body; andwherein the second control means determines a mode-corresponding control value corresponding to each of the modes so as to regulate the displacement movement of the body corresponding to the three component modes of the posture of the body including the bouncing component mode, the pitching component mode and the rolling component mode and determines a control value for the flow rate control valve on the basis of the mode-corresponding control value. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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Specification