Air suspension system with load detection
A method of controlling a suspension system for a vehicle which comprises determining a first filter vehicle height based upon a signal from at least one sensor located at a rear axle of the vehicle at a first time. A second filter vehicle height is determined based upon a signal from the at least one sensor located at the rear axle of the vehicle at a second time. The difference between the first filter signal and the second filter signal is compared to a forklift threshold and the suspension system is placed in forklift mode when the difference between the first filter signal and the second filter signal exceeds the forklift threshold.
1. A method of controlling a suspension system for a vehicle comprising:
determining a first filter vehicle height based upon a signal from at least one sensor located at a rear axle of the vehicle at a first time;
determining a second filter vehicle height based upon a signal from the at least one sensor located at the rear axle of the vehicle at a second time;
comparing the difference between the first filter signal and the second filter signal to a forklift threshold; and
placing the suspension system in forklift mode when the difference between the first filter signal and the second filter signal exceeds the forklift threshold.
2. The method of claim 1 , further comprising disabling the forklift mode when a vehicle speed is not equal to zero.
3. The method of claim 1 , further comprising disabling the forklift mode when the suspension system is in a down level mode.
4. The method of claim 1 , wherein determining the first filter vehicle height and the second filter vehicle height further comprises using the signal from a sensor at a rear axle left corner and a rear axle right corner.
5. The method of claim 1 , further comprising exiting forklift mode when the vehicle speed is not equal to zero.
6. The method of claim 1 , wherein up-leveling of the suspension system is disabled when in the forklift mode.
7. The method of claim 1 , wherein the vehicle is a pick-up truck and the suspension system is an adjustable suspension.
8. The method of claim 7 , wherein the suspension system is a four corner adjustable suspension system.
9. A suspension system for a vehicle comprising:
an electronic control unit to control height leveling for the suspension system;
at least one sensor located at a rear axle of the vehicle to determine vehicle height; and
wherein the suspension system is in a forklift mode when the electronic control unit determines that a forklift threshold has been exceed based upon a comparison between a first height measurement from the sensor collected at a first time and a second height measurement from the sensor collected at a second time.
10. The suspension system of claim 9 , wherein the forklift mode is disabled when a vehicle speed is not equal to zero.
11. The suspension system of claim 9 , wherein the forklift mode is disabled when the suspension system is in a down level mode.
12. The suspension system of claim 9 , wherein the at least one sensor includes a sensor at a rear axle left corner and a rear axle right corner.
13. The suspension system of claim 9 , wherein the vehicle is a pick-up truck and the suspension system is an adjustable suspension.
14. The suspension system of claim 13 , wherein the suspension system is a four corner adjustable suspension system.