Electric vehicle drive train with direct coupling transmission

Patent · Sun Jan 01 04:00:00 EST 1995

OSTI ID:869810

Tankersley, Jerome B ^[1]; Boothe, Richard W ^[2]; Konrad, Charles E ^[2]

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1. Fredericksburg, VA
2. Roanoke, VA

An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox.

• Research Organization: Ford Motor Co
• DOE Contract Number: AC07-90ID13019
• Assignee: General Electric Company (Fairfield, CT)
• Patent Number(s): US 5403244
• OSTI ID: 869810
• Country of Publication: United States
• Language: English

Related Subjects

/477/180/
associated
below
braking
changing
controller
coupled
coupling
direct
direct coupled
direct coupling
drive
drive train
electric
electric motor
electric vehicle
gearbox
increased
mode
motor
motor speed
operable
operating
planetary
planetary gear
predetermined
predetermined value
preferably
reduces
reduction
regeneratively
responsive
sensor
single
single stage
speed
speed reduction
speed sensor
stage
train
transmission
value
vehicle
vehicle drive