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US 4,461,988 AGranted
Apparatus for controlling an electrical vehicle drive system
AssigneeGeneral Electric Company
InventorAlan B. Plunkett
Life of this patent
Estimating the term…
Abstract
A torque command proportional to accelerator position is provided at low speeds with a transition to a torque command dependent on accelerator pedal position that varies to provide constant horsepower at high speeds. The transition occurs between constant torque command and torque command providing constant power at decreasingly lower speeds with decreasing accelerator pedal position. The torque command provides the control input to a traction motor for an electric vehicle.
Claims5
An electric vehicle drive system responsive to accelerator pedal position comprising:
- means for generating a torque command having means for generating a constant torque signal proportional to accelerator pedal position, means for generating a torque signal varying with vehicle speed to maintain constant horsepower and dependent on accelerator pedal position, and means for comparing said signals and selecting the smaller as the torque command, Whereby the transition between constant torque command and torque command producing constant horsepower occurs at lower speeds with decreasing pedal position;
- and
- a traction motor control system responsive to said torque command.
Dependencies are inferred from the claim text.