Adaptive PID control method and system for internal combustion engine rotation speed pulsation damping

• US 6,591,808 B2
• Filed: 10/01/2001
• Issued: 07/15/2003
• Est. Priority Date: 10/01/2001
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Lin, Feng, Badreddine, Bader, Sun, Jing, Zaremba, Alexander T
• Primary Examiner(s): Miller, Carl S.
• Assistant Examiner(s): Castro, Arnold
• Application Number:
  US09/967,118
• Publication Number:
  US 20030065439A1
• Time in Patent Office: 652 Days
• Field of Search: 123/339.14, 123/339.16, 123/339.18, 123/339.19, 123/339.21, 123/352, 123/436, 123/350, 123/192.1, 701/110, 701/111, 735/74
• US Class Current: 123/352
• CPC Class Codes: B60W 2050/0011 Proportional Integral Differential [PID] controller
• CPC Class Codes: F02D 2041/1409 using at least a proportional, integral or derivative controller
• CPC Class Codes: F02D 2041/1422 Variable gain or coefficients
• CPC Class Codes: F02D 2250/24 by using an external load, e.g. a generator
• CPC Class Codes: F02D 31/001 Electric control of rotation speed
• CPC Class Codes: F02D 41/1498 measuring engine roughness
• CPC Class Codes: F02N 11/04 the motors being associated with current generators

Abstract

Within both a method for operating an internal combustion engine and a system for operating the internal combustion engine there is provided an engine rotation speed pulsation damping within the internal combustion engine through use of a PID controller which varies a single PID control parameter, particularly, K_D to provide the engine rotation speed pulsation damping within the internal combustion engine. Within both the method and the system there is also provided a pair of control algorithms for use within the PID controller such as to effect the desired engine rotation speed pulsation damping when operating the internal combustion engine.

Claims

1. A method for operating an internal combustion engine comprising:

providing an internal combustion engine having assembled thereto an engine rotation speed sensor and a supplemental torque source that is controlled by a PID controller;

determining continuously, while operating the internal combustion engine, input values for at least a desired internal combustion engine rotation speed, an observed internal combustion engine rotation speed and a supplemental torque supplied by the supplemental torque source and inputting those input values to the PID controller;

adjusting continuously, through operation of a control algorithm within the PID controller with respect to the input values, a single PID control parameter to control the supplemental torque source such as to damp an engine rotation speed pulsation within the internal combustion engine.

2. The method of claim 1 wherein the single PID control parameter is K_D.

3. The method of claim 1 wherein the control algorithm is given by the equation:

4. The method of claim 3 wherein γ

₁ is from about 100 to about 1200 and α

₁ is from about 1E−

4 to about 1E−

7.

5. The method of claim 1 wherein the control algorithm is given by the equation:

6. The method of claim 5 wherein γ

₂ is from about 0.01 to about 5 and α

₂ is from about 1E−

1 to about 1E−

3.

7. The method of claim 1 wherein the internal combustion engine is assembled within a transportation vehicle.

8. A system for operating an internal combustion engine comprising:

an internal combustion engine having assembled thereto an engine rotation speed sensor and a supplemental torque source;

a PID controller controlling the supplemental torque source, the PID controller having as inputs at least a desired internal combustion engine rotation speed, an observed internal combustion engine rotation speed and a supplemental torque, the PID controller being programmed with a control algorithm which operates upon the inputs to vary a single PID control parameter with respect to control of the supplemental torque source such as to damp an engine rotation speed pulsation within the internal combustion engine when operating the internal combustion engine.

9. The system of claim 8 wherein the single PID control parameter is K_D.

10. The system of claim 8 wherein the control algorithm is given by the equation:

11. The system of claim 10 wherein γ

₁ is from about 100 to about 1200 and α

₁ is from about 1E−

4 to about 1E−

7.

12. The system of claim 8 wherein the control algorithm is given by the equation:

13. The system of claim 12 wherein γ

₂ is from about 0.01 to about 5 and α

₂ is from about 1E−

1 to about 1E−

3.

14. The system of claim 8 wherein the internal combustion engine is assembled within a transportation vehicle.