Driver selectable AFM/NVH tolerance

• US 8,326,515 B2
• Filed: 07/24/2009
• Issued: 12/04/2012
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Bolander, Thomas E., Albertson, William C.
• Primary Examiner(s): Kwon, John
• Assistant Examiner(s): HOANG, JOHNNY H
• Application Number:
  US12/508,764
• Publication Number:
  US 20100268435A1
• Time in Patent Office: 1,229 Days
• Field of Search: 701/95, 701/96, 701/99, 701102-105, 701/112, 701/114, 123/198.F, 123/325, 123/332, 123/480, 123/481, 123/198.DB
• US Class Current: 701/102
• CPC Class Codes: F02D 2200/604 Engine control mode selected by driver, e.g. to manually start particle filter regeneration or to select driving style
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 2250/26 by applying a torque limit
• CPC Class Codes: F02D 41/0087 Selective cylinder activation, i.e. partial cylinder operation deceleration cut-off F02D41/123

Abstract

An engine control system includes a coefficient calculation module that selects one of N coefficients based on an AFM selection by a corresponding one of N users. A switching torque calculation module calculates an adjusted active fuel management (AFM) switching threshold based on the one of the N coefficients, a maximum torque of an engine, and a default AFM switching threshold.

Claims

1. An engine control system for a vehicle, the engine control system comprising:

a coefficient determination module that stores N coefficients, each corresponding to a respective active fuel management (AFM) selection by a different one of N users, determines which of said N users is operating said vehicle, and selects one of said N coefficients based on said determination, wherein N is an integer greater than one; and

a switching torque calculation module that calculates an adjusted AFM switching threshold based on said one of said N coefficients, a maximum torque of an engine, and a default AFM switching threshold.

2. The engine control system of claim 1 wherein said adjusted AFM switching threshold is determined according to:

A=T+[C×

(M−

T)],

where A is said adjusted AFM switching threshold, T is said default AFM switching threshold, C is said one of said N coefficients, and M is a percentage of said maximum torque.

3. The engine control system of claim 1 further comprising memory that stores said N coefficients.

4. The engine control system of claim 1 wherein said one of said N coefficients is presented on a display.

5. The engine control system of claim 1 wherein said default AFM switching threshold is based on a transmission gear and an engine speed.

6. The engine control system of claim 1 further comprising an AFM selection module that determines said AFM selection by said different ones of said N users based on a user input.

7. The engine control system of claim 6 wherein said user input includes at least one of a button, a touch screen, a paddle, a dial, and knob.

8. An engine control method for a vehicle, the method comprising:

storing N coefficients, each corresponding to a respective active fuel management (AFM) selection by a different one of N users;

determining which of said N users is operating said vehicle;

selecting one of said N coefficients based on said determination, wherein N is an integer greater than one; and

calculating an adjusted AFM switching threshold based on said one of said N coefficients, a maximum torque of an engine, and a default AFM switching threshold.

9. The method of claim 8 wherein said adjusted AFM switching threshold is determined according to:

A=T+[C×

(M−

T)],

where A is said adjusted AFM switching threshold, T is said default AFM switching threshold, C is said one of said N coefficients, and M is a percentage of said maximum torque.

10. The method of claim 8 further comprising storing said N coefficients in memory.

11. The method of claim 8 further comprising displaying said one of said N coefficients to a user.

12. The method of claim 8 wherein said default AFM switching threshold is based on a transmission gear and an engine speed.

13. The method of claim 8 further comprising selecting said respective AFM selection based on a user input.

14. The method of claim 13 wherein said user input includes at least one of a button, a touch screen, a paddle, a dial, and knob.