METHOD AND SYSTEM TO CONTROL ELECTRONIC THROTTLE SENSITIVITY

• US 20090222183A1
• Filed: 02/28/2008
• Published: 09/03/2009
• Est. Priority Date: 02/28/2008
• Status: Active Grant

• Current Assignee: Blue Leaf IP Incorporated (CNH Industrial N.V.)
• Original Assignee: Blue Leaf IP Incorporated (CNH Industrial N.V.)
• Inventors: Shoemaker, Joseph R.
• Granted Patent: US 8,204,662 B2
• Time in Patent Office: Days
• US Class Current: 701/70
• CPC Class Codes: F02D 11/02 characterised by hand, foot, or like operator controlled initiation means
• 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 11/106 Detection of demand or actuation
• CPC Class Codes: F02D 2200/602 Pedal position

Abstract

An electronic throttle control system for a motorized vehicle includes a sensor providing a signal corresponding to a relative position of an accelerator pedal between an undepressed position and a fully depressed position at a first predetermined time interval. A memory device is provided for storing a plurality of provided signals. A controller is provided for averaging a predetermined number of provided signals and sending the averaged signal to the motor at a second predetermined time interval for modulating operating speed of the motor. Upon the memory device storing the predetermined number of provided signals, provided signals are discarded from the memory device on a first in, first out basis.

Claims

1. An electronic throttle control system for a motorized vehicle comprising:

a sensor providing a signal corresponding to a relative position of an accelerator pedal between an undepressed position and a fully depressed position at a first predetermined time interval;

a memory device for storing a plurality of provided signals;

a controller for averaging a predetermined number of provided signals and sending the averaged signal to the motor at a second predetermined time interval for modulating operating speed of the motor; and

wherein upon the memory device storing the predetermined number of provided signals, provided signals are discarded from the memory device on a first in, first out basis.

2. The control system of claim 1, wherein the predetermined number of signals is modifiable.

3. The control system of claim 1, wherein the predetermined number of signals is modifiable while the vehicle is operating.

4. The control system of claim 2, wherein the predetermined number of signals is modifiable in a selectable plurality of signal number values.

5. The control system of claim 4, wherein the selectable plurality of signal number values is 3.

6. The control system of claim 1, wherein the first predetermined time interval is between about 5 milliseconds to about 500 milliseconds.

7. The control system of claim 6, wherein the first predetermined time interval is between about 5 milliseconds to about 50 milliseconds.

8. The control system of claim 7, wherein the first predetermined time interval is about 10 milliseconds.

9. The control system of claim 1, wherein the second predetermined time interval is between about 10 milliseconds to about 500 milliseconds.

10. The control system of claim 9, wherein the second predetermined time interval is between about 15 milliseconds to about 100 milliseconds.

12. The control system of claim 1, wherein the memory device sequentially stores the plurality of provided signals.

13. The control system of claim 1, wherein the predetermined number of signals is between about 3 and about 25.

14. The control system of claim 13, wherein the predetermined number of signals is between about 5 and about 15.

20. The method of claim 13, wherein the predetermined number of signals is between about 5 and about 15.

11. The control system of claim 11, wherein the second predetermined time interval is about 20 milliseconds.

15. A method for controlling an electronic throttle for a motorized vehicle, the steps comprising:

continuously sampling a signal corresponding to a relative position of an accelerator pedal between an undepressed position and a fully depressed position at each first predetermined time interval;

storing the sampled signals;

calculating an average signal based on a predetermined number of the sampled signals;

sending the averaged signal to the motor for modulating operating speed of the motor; and

discarding stored sampled signals on a first in, first out basis upon the number of stored sampled signals exceeding the predetermined number of sampled signals.

16. The method of claim 15, further including an additional step of selectively modifying the predetermined number of signals.

17. The method of claim 16, wherein the selectively modifying step provides a selectable plurality of signal number values.

18. The method of claim 17, wherein the selectable plurality of signal number values is 3.

19. The method of claim 16, wherein the predetermined number of signals is between about 3 and about 25.