Sensor feedback control for noise and vibration
A method of controlling noise/vibration in a vehicle having a powertrain includes sensing noise/vibration in the vehicle. An operating point of the powertrain is adjusted and a constant transmission output power is maintained to reduce the noise/vibration.
1. A method of controlling noise/vibration in a vehicle having a powertrain, the method comprising:
sensing at least one of noise and vibration in the vehicle; and
adjusting an operating point of the powertrain while maintaining a constant transmission output power to reduce the at least one of noise and vibration.
2. The method of claim 1 wherein said adjusting and maintaining comprise adjusting engine speed of the vehicle using at least one of a throttle, a transmission gear and an ignition system of the vehicle.
3. The method of claim 1 further comprising:
identifying an operational range of the vehicle in which the at least one of noise and vibration occurs; and
performing the adjusting and maintaining to avoid operation of the vehicle in the range.
4. The method of claim 1 wherein said sensing is performed using a vibration sensing module.
5. The method of claim 1 further comprising coordinating a change in an opening of a throttle of the vehicle with a change in torque converter slip.
6. The method of claim 1 wherein the vehicle includes a variable displacement engine, said method performed while the vehicle is operated in a deactivated mode.
7. The method of claim 6 further comprising causing the vehicle to operate in an activated mode based on the sensing.
8. The method of claim 1 further comprising at least one of changing a spark timing of the engine and downshifting the vehicle.
9. A method of controlling noise/vibration in a vehicle having a powertrain, said method comprising:
sensing at least one of noise and vibration while the vehicle operates in an operating range that may be conducive to at least one of noise and vibration; and
adjusting an operating point of the powertrain to shift vehicle operation outside the range,
wherein the vehicle includes a variable displacement engine, said sensing performed while the vehicle is operated in a deactivated mode.
10. The method of claim 9 wherein said adjusting comprises adjusting at least one of torque converter slip and a throttle opening of the vehicle.
11. The method of claim 9 further comprising causing the vehicle to operate in an activated mode based on said sensing.
12. The method of claim 9 wherein said adjusting is performed in a closed loop based on said sensing.
13. The method of claim 9 wherein said adjusting is performed while maintaining a constant transmission output power.
14. The method of claim 9 further comprising at least one of changing a spark timing of the engine and downshifting the vehicle.
15. The method of claim 9 wherein said adjusting comprises increasing torque converter slip while decreasing the throttle opening to maintain a constant transmission power.
16. A system for controlling at least one of noise and vibration in a vehicle having a powertrain, the system comprising:
a vibration sensing module that senses whether noise/vibration is present in the vehicle; and
a control module that, while at least one of noise and vibration is sensed, adjusts an operating point of the powertrain while maintaining a constant powertrain output power to reduce the at least one of noise and vibration.
17. The system of claim 16 wherein said vibration sensing module comprises an accelerometer mounted on a body of the vehicle.
18. The system of claim 16 wherein said control module adjusts at least one of torque converter slip, an opening of a throttle of the vehicle, spark timing of an ignition system, and a transmission gear of the vehicle.
19. The system of claim 16 wherein the vehicle comprises a variable displacement engine and said control module adjusts an operating point of the powertrain while the vehicle operates in a deactivated mode.
20. A system for controlling noise/vibration in a vehicle having a powertrain, said method comprising:
a vibration sensing module that senses and compares at least one of noise and vibration to a threshold while the vehicle is operating in an operating range conducive to at least one of noise and vibration; and
a control module that, based on a result of the comparing by said vibration sensing module, adjusts an operating point of the powertrain to shift vehicle operation outside the range,
wherein the vehicle includes a variable displacement engine, and said vibration sensing module senses at least one of noise and vibration while the vehicle is operated in a deactivated mode.
21. The system of claim 20 wherein said control module adjusts at least one of torque converter slip and a throttle opening of the vehicle.
22. The method of claim 20 wherein said control module adjusts said operating point while maintaining a constant transmission output power.
23. The method of claim 20 wherein said control module increases torque converter slip while decreasing the throttle opening to maintain a constant transmission power.