Ford Global Technolgoies, LLC

Natarajan Sureshbabu

Kathleen Ellen Bailey

Mark Steven Yamazaki

Marvin Paul Kraska

Susan Rebecca Cikanek

Barry Kay Powell

A control method and control system for a hybrid electric vehicle powertrain with a multiple-ratio transmission is disclosed in which engine start events are separated in time from transmission ratio shift events to effect a smooth transition from an electric drive state with the engine off to a drive state in which the engine delivers driving power.

Hybrid electric vehicle powertrain with engine start and transmission shift arbitration

A method of distributing a torque demand in a hybrid electric vehicle having an internal combustion engine and an electric motor is provided. In hybrid operation, the motor initially starts the vehicle. When the vehicle desired power demand reaches a first vehicle operational parameter, a controller switches the torque demand to the engine . An accelerator pedal has a position sensor which determines a non-fixed pedal first position during transition between the motor and engine . The accelerator pedal also has a preset second position wherein a maximum of engine torque is requested. The controller , cognizant of the accelerator pedal first and second positions, linearly scales the accelerator pedal to provide a uniform torque-responsive accelerator pedal.

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Canton, MI, United States of America

Natarajan Sureshbabu