Method and system for power matching during a downshift
AssigneeFord Global Technologies, LLC
InventorsBradley Dean Riedle, Kurt Howard Nickerson, Jianping Zhang, Kendrick Morrison, David H. Schmitt, Markian Oleh Diakiw, Charles Suter
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Abstract
A method for downshifting a vehicle having an automatic transmission is described. In one example, the method determines whether or not conditions are met for a power matching downshift. If conditions are met for a power matching downshift, output power of a powertrain propulsion torque source at an end of the power matching downshift is adjusted to an output power of the powertrain propulsion torque source at the beginning of the power matching downshift plus an offset power.
Claims20
A vehicle operating method, comprising:
- reducing torque of a powertrain propulsion torque source during a transmission gear downshift;
- and
- adjusting power of the powertrain propulsion torque source at an end of the transmission gear downshift to an offset power plus an engine power output generated at a beginning of the transmission gear downshift.
A vehicle system, comprising:
- an internal combustion engine;
- a transmission;
- an accelerator pedal;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to downshift the transmission in response to a position of the accelerator pedal and vehicle speed and adjust power output of the internal combustion engine at an end of the downshift to a reference power plus and offset power.
A vehicle operating method, comprising:
- reducing torque of an internal combustion engine in response to power matching downshift conditions being met;
- and
- adjusting power of the internal combustion engine to an offset power plus a power output of the internal combustion engine at a beginning of a power matching downshift in response to an end of torque modulation of the internal combustion engine during the power matching downshift.
Dependencies are inferred from the claim text.