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US 2015/0032309 A1Published application
Engine speed control apparatus and method for a hybrid vehicle
AssigneeFord Global Technologies, LLC
InventorsWei Liang, Carol Louise Okubo, Thomas Chrostowski, Ming Lang Kuang
Life of this patent
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Abstract
A vehicle powertrain system has an engine, a damper and an electric machine configured to be selectively mechanically coupled with the engine via damper. The vehicle powertrain system also has at least one controller programmed to filter a frequency content of a speed or torque command for the electric machine corresponding to a resonant frequency of the engine, damper and electric machine to reduce resonance of the engine, damper and electric machine.
Claims14
A vehicle comprising:
- an engine;
- a damper;
- an electric machine mechanically coupled with the engine via the damper;
- and
- at least one controller programmed to filter a frequency content of a speed or torque command for the electric machine corresponding to a resonant frequency of the engine, damper and electric machine to reduce vibration of the engine, damper and electric machine while the electric machine responds to the speed or torque command.
2 more elements
A method comprising:
- in response to a speed or torque command for an electric machine, filtering a frequency content of the command corresponding to a resonant frequency of a powertrain system including an engine, damper and the electric machine to reduce vibration of the powertrain system while the electric machine responds to the command.
A vehicle comprising:
- a powertrain system including an engine, a damper, and an electric machine mechanically coupled with the engine via the damper;
- and
- at least one controller programmed to filter a frequency content of a speed or torque command for the electric machine corresponding to a resonant frequency of the powertrain system to reduce vibration of the powertrain system while the electric machine responds to the speed or torque command.
Dependencies are inferred from the claim text.