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US 9,387,742 B2Granted
Suspension system and method of control
AssigneeArvinMeritor Technology, LLC
InventorDavid Van Raaphorst
Life of this patent
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Abstract
A suspension system and a method of control. A load force on a first axle assembly may be increased when a ride height of the first axle assembly differs from the ride height of the second axle assembly by more than a threshold amount and the ride height of the first axle assembly is not within a ride height tolerance.
Claims20
A method of controlling a suspension system comprising:
- determining a ride height of a first axle assembly and a ride height of a second axle assembly;
- and
- increasing a load force upon the first axle assembly when the ride height of the first axle assembly differs from the ride height of the second axle assembly by more than a threshold amount and the ride height of the first axle assembly is not within a ride height tolerance, and maintaining pressure in an air spring of the first axle assembly when the ride height of a first axle assembly differs from the ride height of the second axle assembly by more than the threshold amount, the ride height of the first axle assembly is not within the ride height tolerance, and the load force upon the first axle assembly is not less than a target axle load.
A method of controlling a suspension system comprising:
- determining a ride height of a first axle assembly and a ride height of a second axle assembly;
- and
- increasing a load force upon the first axle assembly when the ride height of the first axle assembly differs from the ride height of the second axle assembly by more than a threshold amount and the ride height of the first axle assembly is not within a ride height tolerance, and decreasing pressure in an air spring of the second axle assembly when the ride height of the first axle assembly differs from the ride height of the second axle assembly by more than the threshold amount, the ride height of the first axle assembly is not within the ride height tolerance, and the load force upon the first axle assembly is less than a target axle load.
A method of controlling a suspension system comprising:
- determining a vehicle speed, a ride height of a first axle assembly, and a ride height of a second axle assembly;
- and
- increasing a load force on the first axle assembly when the vehicle speed is less than a threshold speed value, the ride height of the first axle assembly differs from the ride height of the second axle assembly by more than a threshold amount, the ride height of the first axle assembly is not within a ride height tolerance, and the load force is less than a target axle load, wherein the load force on the first axle assembly is not increased when the ride height of the first axle assembly is not within the ride height tolerance and the load force on the first axle assembly exceeds the target axle load.
A suspension system for a vehicle comprising:
- a first axle assembly having an inflatable first air spring that supports a chassis of the vehicle and a first ride height sensor that detects a ride height of the first axle assembly;
- a second axle assembly having an inflatable second air spring that supports the chassis and a second ride height sensor that detects a ride height of the second axle assembly;
- and
- a vehicle speed sensor that provides data indicative of vehicle speed;
- wherein a load force on the first axle assembly is increased when the vehicle speed is less than a threshold speed value, the ride height of a first axle assembly differs from the ride height of the second axle assembly by more than a threshold amount, and the ride height of the first axle assembly is not within a ride height tolerance, and pressure in the second air spring is maintained when the ride height of the first axle assembly differs from the ride height of the second axle assembly by more than the threshold amount, the ride height of the first axle assembly is not within the ride height tolerance, and the load force upon the first axle assembly is not less than a target axle load.
2 more elements
Dependencies are inferred from the claim text.