Ride-height control system

• US 8,333,390 B2
• Filed: 06/30/2008
• Issued: 12/18/2012
• Est. Priority Date: 07/03/2007
• Status: Active Grant

• Current Assignee: Oshkosh Corporation
• Original Assignee: Oshkosh Corporation
• Inventors: Linsmeier, Catherine R., Ellifson, Erik S., Magners, Kevin W.
• Primary Examiner(s): Culbreth, Eric
• Assistant Examiner(s): GOODEN JR, BARRY J
• Application Number:
  US12/165,473
• Publication Number:
  US 20090033044A1
• Time in Patent Office: 1,632 Days
• Field of Search: 280/5.515, 280/6.151, 280/6.153, 280/6.154, 280/6.155, 280/6.157
• US Class Current: 280/5.514
• CPC Class Codes: B60G 17/018 characterised by the use of a specific signal treatment or control method
• CPC Class Codes: B60G 2400/252 vertical
• CPC Class Codes: B60G 2400/60 Load
• CPC Class Codes: B60G 2500/20 Spring action or springs
• CPC Class Codes: B60G 2600/02 Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption

Abstract

In some embodiments, a land vehicle includes sensors that provide information relating to a ride height of the land vehicle. A processing circuit monitors data from the sensors and controls adjustment of one or more vehicle systems that affect the vehicle'"'"'s ride height based on the data from the sensors. In some embodiments, the processing circuit controls a suspension system and can control the suspension system to have any of a multiplicity of height settings. In some embodiments, the processing circuit controls the ride height based on a user selection of a pre-configured ride height setting. In some embodiments, the processing circuit is configured to maintain a ride height of the vehicle at a consistent ride height when the suspension is unlocked after a load is removed where the suspension was locked after the load was added.

Claims

1. A land vehicle comprising:

sensors configured to provide information relating to a ride height of the land vehicle, the ride height being related to a distance from an axle center to vehicle rails;

a user input device configured to receive user input from a user of the vehicle, the user input comprising a selection of a mode from among a plurality of modes, the plurality of modes comprising a manual up mode, a manual down mode, and a plurality of automatic modes, wherein each of the plurality of automatic modes is associated with an action that can be performed using the vehicle and an automatic mode is activated responsive to receiving a user selection of a descriptive representation of the action associated with the automatic mode, wherein each of the plurality of automatic modes has an associated mode target ride height, wherein at least one of the automatic modes is an automatic loading mode, and wherein the automatic loading mode is associated with an action of loading the land vehicle onto a transport vehicle for transport and has an associated loading mode target ride height that is suitable for loading the land vehicle onto the transport vehicle; and

a processing circuit configured to determine a target ride height based on the mode selected by the user,

wherein the processing circuit configured to monitor data from the sensors and to output a signal configured to cause adjustment of one or more vehicle systems that affect a vehicle ride height based on the data from the sensors and the target ride height, wherein the processing circuit is configured to cause the one or more vehicle systems to alternately adjust heights of at least one of opposing sides and opposing ends of the vehicle until the ride height has reached the target ride height, wherein the processing circuit is configured to cause the one or more vehicle systems to

adjust a first height of a first side or end until a difference between the first height and a second height of an opposing second side or end exceeds a threshold,

adjust the second height of the second side or end in a same direction in which the first height was adjusted, wherein the second height is adjusted until the difference between the first height and the second height exceeds the threshold, and

continue adjusting the first height of the first side or end and the second height of the second side or end in an alternating manner until at least one of the first height and the second height reaches or passes the target ride height.

2. The land vehicle of claim 1, further comprising a suspension and a suspension control system, wherein the processing circuit is configured to output a signal to the suspension control system based on the data from the sensors.

3. The land vehicle of claim 1, wherein the user input device comprises a touch screen display configured to present the plurality of modes to the user, wherein the display is configured to present, for each of the plurality of automatic modes, the representation of the predetermined operating function associated with the respective automatic mode, wherein the touch screen display is configured to receive a user selection of an automatic mode through the user touching the representation of the associated operating function on the touch screen display.

4. The land vehicle of claim 1, wherein the predetermined operating functions represented by the plurality of automatic modes comprise at least one of an obstacle avoidance mode, a trailer load/unload mode, an aircraft mode, and a transport mode.

5. The land vehicle of claim 1, further comprising a speed sensor configured to measure a speed of the vehicle, wherein the processing circuit is configured to set the target ride height to the mode target ride height of the selected automatic mode when the speed of the vehicle is equal to or below a maximum speed associated with the selected automatic mode.

6. The land vehicle of claim 1, wherein the processing circuit is configured to cause the one or more vehicle systems to alternately adjust heights of a left side and a right side of the vehicle until the ride height has reached the target ride height, wherein the processing circuit is configured to cause the one or more vehicle systems to:

adjust one of a left side height of the left side and a right side height of the right side until a difference between the left side height and the right side height exceeds a threshold,

adjust the other of the left side height and the right side height in a same direction in which the previous adjustment was made until the difference between the left side height and the right side height exceeds the threshold, and

continue adjusting the left side height and the right side height in an alternating manner until at least one of the left side height and the right side height reaches or passes the target ride height.

7. The land vehicle of claim 1, wherein the processing circuit is configured to cause the one or more vehicle systems to alternately adjust heights of a front end and a back end of the vehicle until the ride height has reached the target ride height, wherein the processing circuit is configured to cause the one or more vehicle systems to:

adjust one of a front end height of the front end and a back end height of the back end until a difference between the front end height and the back end height exceeds a threshold,

adjust the other of the front end height and the back end height in a same direction in which the previous adjustment was made until the difference between the front end height and the back end height exceeds the threshold, and

continue adjusting the front end height and the back end height in an alternating manner until at least one of the front end height and the back end height reaches or passes the target ride height.

8. The land vehicle of claim 1, wherein the processing circuit is configured to cause the one or more vehicle systems to alternately adjust heights of a front end and a back end of the vehicle until the ride height has reached the target ride height, wherein the processing circuit is configured to cause the one or more vehicle systems to:

adjust a first end height of a first end of the vehicle until a difference between the first end height and a second end height of a second end of the vehicle exceeds a threshold, wherein the processing circuit is configured to cause the one or more vehicle systems to adjust the first end height by adjusting heights of a first side of the first end and a second side of the first end in an alternating manner until a difference between the second end height and at least one of the heights of the first side and the second side of the first end exceeds the threshold,

adjust the second end height in a same direction in which the first end height was adjusted until a difference between the first end height and the second end height exceeds the threshold, wherein the processing circuit is configured to cause the one or more vehicle systems to adjust the second end height by adjusting heights of a first side of the second end and a second side of the second end in an alternating manner until a difference between the first end height and at least one of the heights of the first side and the second side of the second end exceeds the threshold, and

continue adjusting the first end height and the second end height in an alternating manner until at least one of the first end height and the second end height reaches or passes the target ride height.

9. The land vehicle of claim 1, wherein, once at least one of the first end height and the second end height reaches or passes the target ride height, the processing circuit is configured to cause the one or more vehicle systems to simultaneously adjust a the first end height and the second end height until both the first end height and the second end height are approximately equal to the target ride height.

10. The land vehicle of claim 1, wherein the processing circuit is configured to monitor the data from the sensors in order to maintain the ride height of the vehicle at substantially the same height, and is configured to output the signal to cause adjustment in response to a change in vehicle ride height.

11. The land vehicle of claim 10, wherein the ride height at which the processing circuit is configured to maintain the vehicle is a height based on the selected mode.

12. The land vehicle of claim 10, wherein the ride height at which the processing circuit is configured to maintain the vehicle is adjustable.

13. The land vehicle of claim 1, further comprising:

a suspension system connected to the wheels of the vehicle; and

the processing circuit configured to control the suspension system, wherein the processing circuit can control the suspension system to adjust each wheel zone height independent of the other wheel zone heights.

14. The land vehicle of claim 13, wherein the processing circuit is configured such that it can control the suspension system to have any of a plurality of height settings.

15. The land vehicle of claim 13, wherein the processing circuit is configured to control a height setting of the suspension system by outputting a control signal configured to control a hydraulic system to adjust the height setting of the suspension system.

16. The land vehicle of claim 13, wherein the processing circuit is configured to control the height settings of the suspension system in response to a user input.

17. The land vehicle of claim 16, wherein the processing circuit is configured to maintain the suspension at a height setting that is set in response to the mode selected by the user based on data from sensors configured to monitor data relating to the height of the suspension.

18. The land vehicle of claim 13, wherein

the suspension system is a first suspension system;

the land vehicle further comprises a second suspension system; and

the processing circuit is further configured to control a height of the second suspension system.

19. The land vehicle of claim 18, wherein the processing circuit is configured such that the first suspension system and the second suspension system may have different height settings.

20. The land vehicle of claim 18, further comprising a third suspension system and a fourth suspension system.

21. The land vehicle of claim 20, wherein the processing circuit is configured to control the first suspension and the second suspension based on a first height setting, and is configured to control the third suspension and the fourth suspension based on a second height setting.

22. The land vehicle of claim 21, wherein the processing circuit is configured to always control the first suspension based on the same height setting used to control the second suspension.

23. A land vehicle comprising:

a ride height control system configured to adjust a ride height of the land vehicle, the ride height being related to a distance from an axle center to vehicle rails;

a user input device configured to receive user input from a user of the vehicle, the user input comprising a selection of a mode from among a plurality of modes, the plurality of modes comprising a manual up mode, a manual down mode, and a plurality of automatic modes, wherein each of the plurality of automatic modes is associated with an action that can be performed using the vehicle and an automatic mode is activated responsive to receiving a user selection of a descriptive representation of the action associated with the automatic mode, wherein each of the plurality of automatic modes has an associated mode target ride height; and

a processing circuit configured to determine a target ride height based on the mode selected by the user; and

the processing circuit configured to output a signal configured to control the ride height control system, the processing circuit configured to control the ride height control system based on the selected mode and the target ride height,

wherein, responsive to receiving the signal from the processing circuit, the ride height control system is configured to alternately adjust heights of a front end and a back end of the vehicle until the ride height has reached the target ride height, wherein the ride height control system is configured to;

adjust a first end height of a first end of the vehicle until a difference between the first end height and a second end height of a second end of the vehicle exceeds a threshold, wherein the ride height control system is configured to adjust the first end height by adjusting heights of a first side of the first end and a second side of the first end in an alternating manner until a difference between the second end height and at least one of the heights of the first side and the second side of the first end exceeds the threshold,

adjust the second end height in a same direction in which the first end height was adjusted until a difference between the first end height and the second end height exceeds the threshold, wherein the ride height control system is configured to adjust the second end height by adjusting heights of a first side of the second end and a second side of the second end in an alternating manner until a difference between the first end height and at least one of the heights of the first side and the second side of the second end exceeds the threshold, and

continue adjusting the first end height and the second end height in an alternating manner until at least one of the first end height and the second end height reaches or passes the target ride height.

24. The land vehicle of claim 23, wherein each of the plurality of automatic modes corresponds to a target ride height.

25. The land vehicle of claim 23, wherein the user input is an input of non-height information.

26. The land vehicle of claim 23, wherein the processing circuit configured to control the ride height control system based on receipt of a user input corresponding to a function requested by a user.

27. The land vehicle of claim 23, wherein the processing circuit configured to control the ride height control system based on receipt of a user input of a load handling system mode.

28. The land vehicle of claim 23, wherein the user input device comprises a touch screen display configured to present the plurality of modes to the user, wherein the display is configured to present, for each of the plurality of automatic modes, the representation of the predetermined operating function associated with the respective automatic mode, wherein the touch screen display is configured to receive a user selection of an automatic mode through the user touching the representation of the associated operating function on the touch screen display.

29. The land vehicle of claim 23, wherein the predetermined operating functions represented by the plurality of automatic modes comprise at least one of an obstacle avoidance mode, a trailer load/unload mode, an aircraft mode, and a transport mode.

30. The land vehicle of claim 23, further comprising a speed sensor configured to measure a speed of the vehicle, wherein the processing circuit is configured to set the target ride height to the mode target ride height of the selected automatic mode when the speed of the vehicle is equal to or below a maximum speed associated with the selected automatic mode.

31. The land vehicle of claim 23, wherein, once at least one of the first end height and the second end height reaches or passes the target ride height, the ride height control system is configured to simultaneously adjust a the first end height and the second end height until both the first end height and the second end height are approximately equal to the target ride height.