Dynamic electronic throttle position feedforward system

• US 6,526,941 B1
• Filed: 08/14/2001
• Issued: 03/04/2003
• Est. Priority Date: 08/14/2001
• Status: Expired due to Fees

• Current Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Pursifull, Ross Dykstra, McDonald, Dennis
• Primary Examiner(s): Kwon, John
• Application Number:
  US09/930,428
• Publication Number:
  US 20030034007A1
• Time in Patent Office: 567 Days
• Field of Search: 123/361, 123/399, 318/254
• US Class Current: 123/399
• 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 2041/141 using a feed-forward control element
• CPC Class Codes: F02D 35/0007 using electrical feedback F02D35/0015 takes precedence

Abstract

A method for controlling a positioning device of an internal combustion engine includes the steps of: providing an electric motor for actuating the positioning device with the positioning device applying a torque to the; detecting a commanded position of the positioning device; detecting a sensed position of the positioning device; forming a damping term based upon the sensed position; forming a dynamic feedforward term based upon the commanded position; and forming a control action based separately upon the damping term and the dynamic feedforward term.

Claims

1. A method for controlling a positioning device of an internal combustion engine, the method comprising the steps of:

detecting a commanded position of said positioning, device;

detecting a sensed position of said positioning device;

forming a dynamic feedforward term based upon said commanded position; and

forming a control action based upon said dynamic feedforward term.

2. The method as recited in claim 1, further comprising the step of enabling said dynamic feedforward term for a first encountered step change in throttle position command.

3. The method as recited in claim 2, further comprising the step of disabling said dynamic feedforward term after said step change in throttle position command.

4. The method as recited in claim 3, further comprising the step of re-enabling said dynamic feedforward term for a large step.

5. The method as recited in claim 4, wherein said large step comprises a step larger than 0.75 degrees.

6. The method as recited in claim 4, further comprising the step of re-enabling said dynamic feedforward term when no step input changes for a predetermined period of time.

7. The method as recited in claim 6, said predetermined period of time is approximately sixteen milliseconds.

8. The method as recited in claim 7, further comprising the step of re-enabling said dynamic feedforward term when a requested step input changes sign.