Control system for a load-carrying vehicle

• US 20060155447A1
• Filed: 01/07/2005
• Published: 07/13/2006
• Est. Priority Date: 01/07/2005
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Uken, Gary Dean, Roley, Robert Doyle
• Application Number:
  US11/030,059
• Publication Number:
  US 20060155447A1
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 2300/17 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/702 Road conditions
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 29/00 Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
• CPC Class Codes: F02D 41/1497 With detection of the mechanical response of the engine
• CPC Class Codes: F16H 59/24 dependent on the throttle opening
• CPC Class Codes: F16H 59/52 dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus
• CPC Class Codes: F16H 59/66 Road conditions, e.g. slope, slippery

Abstract

A control system for a load-carrying vehicle includes a sensor configured to measure a parameter of the vehicle and communicate a sensor signal indicative of the measured parameter. The control system also includes a control module configured to receive the sensor signal from the sensor and determine an appropriate engine power level based on the sensor signal.

Claims

1. A control system for a load-carrying vehicle, comprising:

a sensor configured to measure a parameter of the vehicle and communicate a sensor signal indicative of the measured parameter; and

a control module configured to receive the sensor signal from the sensor and determine an appropriate engine power level based on the sensor signal.

2. The control system of claim 1, wherein the sensor is a payload sensor configured to measure a payload weight carried by the vehicle.

3. The control system of claim 1, wherein the sensor is a grade detector configured to measure an inclination of the vehicle.

4. The control system of claim 3, wherein the grade detector continuously detects the inclination of the vehicle during operation of the vehicle.

5. The control system of claim 3, including a fuel system,

wherein the determined appropriate engine power level is configured to control the fuel system to use a relatively high amount of fuel when the vehicle is inclined upward based on the sensor signal, and

wherein the determined appropriate engine power level is configured to control the fuel system to use a relatively lower amount of fuel when the vehicle is inclined downward based on the sensor signal.

6. The control system of claim 1, wherein the sensor includes a payload sensor and a grade detector.

7. The control system of claim 1, wherein the engine power level includes a predefined ratio between a throttle signal and an output power from an engine of the vehicle.

8. The control system of claim 1, wherein the engine power level includes a predefined ratio between a throttle signal and an output power from an engine of the vehicle over a range of throttle signals.

9. The control system of claim 8, wherein the range is greater than half the range of possible throttle signals.

10. The control system of claim 8, wherein the range is over a substantially complete range of possible throttle signals.

11. The control system of claim 1, further including a display in communication with the control module, the display being viewable by an operator and configured to convey the measured parameter to a vehicle operator.

12. The control system of claim 1, including a throttle sensor associated with an operator input device, the throttle sensor being configured to communicate a throttle signal to the control module, wherein the control module is configured to determine the appropriate engine power level based on the throttle signal and the sensor signal.

13. The control system of claim 12, wherein the operator input device is one of a foot pedal and a hand-operated lever.

14. The control system of claim 1, wherein the control module is configured to determine an appropriate running gear based on the sensor signal, and configured to output a transmission signal to shift a gear to the determined appropriate running gear.

15. The control system of claim 14, including an oil temperature sensor configured to monitor a brake oil temperature and communicate an oil temperature signal indicative of the monitored brake oil temperature, the control module being configured to determine the appropriate running gear based on the oil temperature signal and the sensor signal.

16. The control system of claim 14, wherein the control module is configured to determine the appropriate running gear based on a lookup table stored within the control module.

17. The control system of claim 1, wherein the control module is configured to adjust a shift point based upon the sensor signal.

18. A method for controlling a load-carrying vehicle with a control system, comprising:

measuring a parameter of the vehicle;

communicating a sensor signal indicative of the measured parameter;

receiving the sensor signal at a control module; and

determining an appropriate engine power level with the control module based on the sensor signal.

19. The method of claim 18, wherein measuring a parameter of the vehicle includes detecting a payload weight carried by the vehicle.

20. The method of claim 18, wherein measuring a parameter of the vehicle includes monitoring an inclination of the vehicle.

21. The method of claim 20, wherein monitoring an inclination of the vehicle is continuously performed during operation of the vehicle.

22. The method of claim 20, including a fuel system, wherein determining an appropriate engine power level includes:

controlling a fuel system to use a relatively high amount of fuel when the vehicle is inclined upward based on the sensor signal; and

controlling the fuel system to use a relatively lower amount of fuel when the vehicle is inclined downward based on the sensor signal.

23. The method of claim 18, wherein measuring a parameter includes:

detecting a payload weight carried by the vehicle; and

monitoring an inclination of the vehicle.

24. The method of claim 18, wherein the engine power level includes a predefined ratio between a throttle signal and an output power from an engine of the vehicle.

25. The method of claim 18, wherein the engine power level includes a predefined ratio between a throttle signal and an output power from an engine of the vehicle over a range of throttle signals.

26. The method of claim 25, wherein the range is greater than half the range of possible throttle signals.

27. The method of claim 25, wherein the range is over a substantially complete range of possible throttle signals.

28. The method of claim 18, further including displaying the measured parameter to a vehicle operator.

29. The method of claim 18, including:

communicating a throttle signal to the control module representative of a command at an input device; and

determining the appropriate engine power level based on the throttle signal and the sensor signal.

30. The method of claim 18, including:

determining an appropriate running gear based on the sensor signal; and

outputting a transmission signal to shift a gear to the determined appropriate running gear.

31. The method of claim 30, including:

monitoring a brake oil temperature and communicating an oil temperature signal indicative of the monitored brake oil temperature; and

determining the appropriate running gear based on the oil temperature signal and the sensor signal.

32. The method of claim 30, wherein determining the appropriate running gear includes using a lookup table stored within the control module.

33. The method of claim 18, including adjusting a shift point based upon the sensor signal.

34. A control system for a load-carrying vehicle, comprising:

a grade detector configured to detect an inclination of the vehicle and communicate a grade signal based on the inclination of the vehicle;

a payload sensor configured to detect a payload weight carried by the vehicle and to communicate a payload signal indicative of the payload weight; and

a control module configured to receive the grade signal from the grade detector and receive the payload signal from the payload sensor and determine an appropriate running gear based on the grade signal and the payload signal.

35. The control system of claim 34, wherein the grade detector continuously detects the inclination of the vehicle during operation of the vehicle.

36. The control system of claim 34, wherein the control module is configured to output a transmission signal to shift a gear to the determined appropriate running gear.

37. The control system of claim 34, including an oil temperature sensor configured to monitor a brake oil temperature and communicate an oil temperature signal indicative of the monitored brake oil temperature, the control module being configured to determine the appropriate running gear based on the oil temperature signal.

38. The control system of claim 34, wherein the engine power level includes a predefined ratio between a throttle signal and an output power from an engine of the vehicle over a range of throttle signals.

39. A load-carrying vehicle, comprising:

a grade detector configured to detect the inclination of the vehicle and communicate a grade signal based on the inclination of the vehicle;

a payload sensor configured to detect a payload weight carried by the vehicle and to communicate a payload signal indicative of the payload weight;

a fuel system configured to send fuel to power the vehicle; and

a control module configured to receive the grade signal from the grade detector and the payload signal from the payload sensor and determine an appropriate engine power level based on the grade and payload signals, wherein the engine power level includes a predefined ratio between throttle position and an amount of fuel sent to an engine of the vehicle over a range of throttle signals, and wherein the control module is configured to send a fuel signal to control the fuel system.

40. The load-carrying vehicle of claim 39, including:

a transmission configured to shift between running gears; and

a control module configured to determine an appropriate running gear based on the grade signal and the payload signal, the control module being configured to generate and output a transmission signal to the transmission to control a running gear.

41. The load-carrying vehicle of claim 39, wherein the grade detector continuously detects the inclination of the vehicle during operation of the vehicle, and wherein the payload sensor continuously detects the payload weight carried by the vehicle during operation of the vehicle.

42. The load-carrying vehicle of claim 39, including an oil temperature sensor configured to monitor a brake oil temperature and communicate an oil temperature signal indicative of the monitored brake oil temperature, the control module being further configured to determine the appropriate running gear based on the oil temperature signal.

43. The load-carrying vehicle of claim 39, including:

a foot pedal configured as a throttle to operate the vehicle; and

a throttle sensor associated with the foot pedal, the throttle sensor being configured to communicate a throttle signal to the control module, wherein the control module is configured to determine the appropriate engine power level based on the throttle signal.

44. The load-carrying vehicle of claim 39, wherein the control module is configured to adjust a shift point based upon at least one of the grade signal and the payload signal.

45. The load-carrying vehicle of claim 39, wherein the grade detector is one of an inclinometer and a GPS receiver.