Driver selectable AFM/NVH tolerance
View Patent ↗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.
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.