초록 ▼

A drive system for a mobile machine is disclosed. The drive system may have a travel speed sensor, at least one traction device speed sensor, and a controller in communication with the travel speed sensor and the at least one traction device speed sensor. The controller may be configured to determin

A drive system for a mobile machine is disclosed. The drive system may have a travel speed sensor, at least one traction device speed sensor, and a controller in communication with the travel speed sensor and the at least one traction device speed sensor. The controller may be configured to determine a slip value associated with a traction device of the mobile machine based on signals generated by the travel speed sensor and the at least one traction device speed sensor, and determine a torque output value of the mobile machine. The control may also be configured to make a comparison of the slip value and the torque output value with a pull-slip curve stored in memory, and selectively update the pull-slip curve based on the comparison.

대표청구항 ▼

1. A drive system for a mobile machine, comprising: a travel speed sensor;at least one traction device speed sensor; anda controller in communication with the travel speed sensor and the at least one traction device speed sensor, the controller being configured to: determine a slip value associated

1. A drive system for a mobile machine, comprising: a travel speed sensor;at least one traction device speed sensor; anda controller in communication with the travel speed sensor and the at least one traction device speed sensor, the controller being configured to: determine a slip value associated with a traction device of the mobile machine based on signals generated by the travel speed sensor and the at least one traction device speed sensor;determine a torque output value of the mobile machine;make a comparison of the slip value and the torque output value with a pull-slip curve stored in memory; andselectively update the pull-slip curve based on the comparison. 2. The drive system of claim 1, wherein the travel speed sensor is one of a Doppler sensor and a GPS sensor. 3. The drive system of claim 2, wherein the at least one traction device speed sensor is configured to generate a signal indicative of an average speed of multiple driven traction devices of the mobile machine. 4. The drive system of claim 3, wherein the slip value is determined as a functional difference between a travel speed of the mobile machine and the average speed of the multiple driven traction devices. 5. The drive system of claim 1, wherein the torque output value is determined as a function of a torque converter speed ratio and at least one of an input speed and an output speed of a torque converter. 6. The drive system of claim 1, wherein the torque output value is determined as a function of engine fueling. 7. The drive system of claim 1, wherein the controller is configured to update the pull-slip curve only when the determined slip value deviates from a corresponding slip value in the pull-slip curve by at least a threshold amount. 8. The drive system of claim 7, wherein the threshold amount is about 5-15%. 9. The drive system of claim 1, wherein the controller is configured to update the pull-slip curve only when a rate of change of the slip value exceeds a threshold rate. 10. The drive system of claim 9, wherein the controller is configured to update the pull-slip curve with current values for the torque output and slip regardless of magnitudes of the torque output and slip values. 11. The drive system of claim 1, wherein the controller is configured to update the pull-slip curve only when the torque output value deviates from a torque output value in the pull-slip curve by at least a threshold amount. 12. The drive system of claim 11, wherein the threshold amount is about 5-15%. 13. The drive system of claim 1, wherein the controller is further configured to modify the entire pull-slip curve when a threshold number of points in the pull-slip curve have been updated such that the modified pull-slip curve is monotonically continuous and passes through the points. 14. The drive system of claim 13, wherein the threshold number of points is three. 15. The drive system of claim 1, wherein the controller is configured to adjust the torque output value based on a pitch of the mobile machine. 16. The drive system of claim 1, wherein the controller is configured to update the pull-slip curve after the mobile machine has been traveling in a straight forward direction for a least a threshold amount of time. 17. The drive system of claim 1, further including a monitor located within the mobile machine, wherein the controller is configured to display on the monitor a representation of current mobile machine performance relative to the pull-slip curve and a target range of performance. 18. The drive system of claim 1, wherein the controller is further configured to autonomously control an operation of the mobile machine based on current machine performance relative to the pull-slip curve. 19. A method for determining a pull-slip curve, comprising: determining a slip value associated with a traction device of a mobile machine based on signals generated by a travel speed sensor and at least one traction device speed sensor;determining a torque output value of the mobile machine;making a comparison, by one or more processors, of the slip value and the torque output value with a pull-slip curve; andselectively updating the pull-slip curve based on the comparison. 20. The method of claim 19, wherein determining the slip value includes determining the slip value as a function of an average speed of multiple driven traction devices of the mobile machine and a travel speed of the mobile machine. 21. The method of claim 19, wherein determining the torque output value includes determining the torque output value as a function of a torque converter speed ratio and at least one of a torque converter input speed and output speed. 22. The method of claim 19, wherein determining the torque output value includes determining the torque output value as a function of engine fueling. 23. The method of claim 19, wherein selectively updating the pull-slip curve includes selectively updating the pull-slip curve only when the determined slip value deviates from a corresponding slip value in the pull-slip curve by at least a threshold amount. 24. The method of claim 19, wherein selectively updating the pull-slip curve includes selectively updating the pull-slip curve only when a rate of change of the slip value exceeds a threshold rate. 25. The method of claim 24, wherein selectively updating the pull-slip curve includes selectively updating the pull-slip curve with current values for the torque output and slip regardless of magnitudes of the torque output and slip values. 26. The method of claim 19, wherein selectively updating the pull-slip curve includes selectively updating the pull-slip curve only when the torque output value deviates from a torque output value in the pull-slip curve by at least a threshold amount. 27. The method of claim 19, further including modifying the entire pull-slip curve when a threshold number of points in the pull-slip curve have been updated such that the modified pull-slip curve is monotonically continuous and passes through the points. 28. The method of claim 19, further including adjusting the torque output value based on a pitch of the mobile machine. 29. The method of claim 19, wherein selectively updating the pull-slip curve includes updating the pull-slip curve only after the mobile machine has been traveling in a straight forward direction for a least a threshold amount of time. 30. The method of claim 19, further including displaying on a monitor within the mobile machine a representation of current mobile machine performance relative to the pull-slip curve and a target range of performance. 31. The method of claim 19, further including autonomously controlling an operation of the mobile machine based on current machine performance relative to the pull-slip curve. 32. A mobile machine, comprising: a frame;an operator station mounted to the frame and including a monitor;an engine mounted to the frame;a plurality of traction devices driven by the engine to propel the mobile machine;a tool operatively connected to the frame and configured to engage a ground surface;a travel sensor configured to detect a travel speed of the mobile machine;a traction device speed sensor configured to detect an average speed of the plurality of traction devices; anda controller in communication with the monitor, the travel sensor, and the traction device speed sensor, the controller being configured to: determine a slip value as a function of the travel speed and the average speed;determine a torque output value of the mobile machine;make a comparison of the slip value and the torque output value with a pull-slip curve stored in memory;selectively update points in the pull-slip curve based on the comparison when at least one of the slip value, a change rate of the slip value, or the torque output value exceeds a corresponding threshold;modify the entire pull-slip curve when a threshold number of points in the pull-slip curve have been updated such that the modified pull-slip curve is monotonically continuous and passes through the points; and display on the monitor an indication of current slip and torque output values relative to the pull-slip curve and relative to a target range in the pull-slip curve. 33. A drive system for a mobile machine, comprising: a travel speed sensor;at least one traction device speed sensor; anda controller in communication with the travel speed sensor and the at least one traction device speed sensor, the controller being configured to: determine a slip value associated with a traction device of the mobile machine based on signals generated by the travel speed sensor and the at least one traction device speed sensor;determine a torque output value of the mobile machine;adjust the torque output value based on a pitch of the mobile machine;make a comparison of the slip value and the adjusted torque output value with a pull-slip curve stored in memory; andselectively update the pull-slip curve based on the comparison.