Timer based vehicle leveling and stabilization system and method of manufacture

Abstract

An example leveling/stabilization system for a vehicle includes a jack, an actuator, a user interface device, and a controller. The jack is adapted to be fixed to the vehicle and is extendable from a stowed position to an auto-deployed position. The actuator is coupled to the jack and is operative to extend and retract the jack responsive to signals from the controller. The user interface device is adapted to receive input from a user. The controller is responsive to an auto-deploy signal from the user interface and operative to provide the control signals to the actuator causing the actuator to continuously extend the jack from the stowed position for a predetermined time period, thereby positioning the jack in the auto-deployed position. No level sensor is required.

We claim: 
     
         1 . A leveling system for a vehicle, said leveling system comprising:
 a jack adapted to be fixed to said vehicle and extendable from a stowed position to a deployed position;   an actuator coupled to said jack and operative to extend and retract said jack;   a user interface device adapted to receive input from a user; and   a controller
 responsive to a deploy signal from said user interface and operative to provide control signals to said actuator causing said actuator to extend said jack from said stowed position for a predetermined time period calculated to place said vehicle in an approximately level state, and 
 responsive to manual adjustment signals from said user interface to provide control signals to said actuator causing said actuator to further extend or retract said jack to adjust said approximately level state without input from a level sensor. 
   
     
     
         2 . The leveling system of  claim 1 , wherein the duration of said predetermined time period depends on physical characteristics of said vehicle and a relative position of said jack with respect to said vehicle. 
     
     
         3 . The leveling system of  claim 2 , wherein the duration of said time period additionally depends on physical characteristics of said actuator. 
     
     
         4 . The leveling system of  claim 1 , wherein the duration of said predetermined time period depends on the distance between said jack and the ground when said jack is in said stowed position. 
     
     
         5 . The leveling system of  claim 4 , wherein the duration of said predetermined time period additionally depends on an amount of lift required to take weight of said vehicle off of the suspension of said vehicle. 
     
     
         6 . The leveling system of  claim 1 , wherein said actuator is a hydraulic actuator. 
     
     
         7 . The leveling system of  claim 1 , additionally comprising:
 a plurality of jacks, said jacks of said plurality of jacks being grouped into at least a first group and a second group; and wherein   said controller
 responsive to said auto-deploy signal from said user interface is operative to provide control signals to said actuator causing said actuator to extend said jacks of said first group from stowed positions of said jacks of said first group for said predetermined time period, thereby positioning said jacks of said first group in a position corresponding to said approximately level state, and 
 to provide control signals to said actuator causing said actuator to extend said jacks of said second group from stowed positions of said jacks of said second group for a second predetermined time period, thereby positioning said jacks of said second group in a position corresponding to said approximately level state. 
   
     
     
         8 . The leveling system of  claim 7 , wherein said actuator includes an individual actuator for each said group of jacks. 
     
     
         9 . The leveling system of  claim 7 , wherein said actuator includes an individual actuator for each said jack. 
     
     
         10 . The leveling system of  claim 7 , wherein the duration of said predetermined time period is different than said duration of said second predetermined time period. 
     
     
         11 . The leveling system of  claim 1 , additionally comprising a sensor responsive to a position of said jack and operative to provide a signal to said controller indicative that said jack is in said stowed position. 
     
     
         12 . The leveling system of  claim 1 , additionally comprising memory for storing a time value associated with said predetermined time period. 
     
     
         13 . The leveling system of  claim 12 , wherein said time value is reconfigurable. 
     
     
         14 . In a leveling system, a method for automatically deploying a plurality of jacks from a stowed position to a deployed position, said method comprising:
 receiving input from a user indicating that said jacks are to be deployed;   determining whether all of said jacks are in said stowed position;   retrieving a time value associated with a first group of said jacks; and   driving said first group of said jacks for a predetermined time period based on said time value, thereby deploying each of said jacks of said first group from their stowed positions to a position corresponding to an approximately level state of said vehicle without receiving input from a level sensor.   
     
     
         15 . The method of  claim 14 , additionally comprising:
 retrieving a second time value associated with a second group of said jacks; and   driving said second group of said jacks for a second predetermined time period based on said second time value, thereby deploying each of said jacks of said second group from their stowed positions to a position corresponding to said approximately level state of said vehicle without receiving input from a level sensor.   
     
     
         16 . The method of  claim 14 , wherein said step of determining whether all of said jacks are in said stowed position includes receiving sensor input from each jack indicating that each jack is fully retracted. 
     
     
         17 . The method of  claim 14 , wherein said step of determining whether all of said jacks are in said stowed position includes retracting said jacks until all of said jacks are in their stowed positions. 
     
     
         18 . A leveling system for a vehicle, said leveling system comprising:
 a jack adapted to be fixed to said vehicle and extendable from a stowed position to a predetermined position corresponding to an approximately level state of said vehicle;   an actuator coupled to said jack and operative to extend and retract said jack;   a user interface device adapted to receive input from a user; and   a controller responsive to a deploy signal from said user interface and operative to provide control signals to said actuator causing said actuator to extend said jack from said stowed position to a position corresponding to an approximately level state of said vehicle without input from a level sensor.   
     
     
         19 . A controller for a leveling system of a vehicle, said controller comprising:
 a user interface device adapted to receive input from a user;   memory for storing data and code, said data including a deploy time value;   a drive interface for providing control signals to a jack; and   a processing unit operative to process said code and, responsive to a deploy signal from said user interface, operative to provide control signals via said drive interface to extend said jack for a time period corresponding to said deploy time value, thereby placing said jack in a position corresponding to an approximately level state of said vehicle.