Interrelated power delivery controls – including engine control – Steering by driving
Patent
1997-05-14
1999-03-09
Johnson, Brian L.
Interrelated power delivery controls, including engine control
Steering by driving
180 656, 180 657, 180 658, 477 3, B62D 1102
Patent
active
058792651
ABSTRACT:
A method and apparatus for the operation of a vehicle with a plurality of electric motors includes an electric motor assigned to each wheel of an axle of the vehicle. Attached to each of the electric motors is a shiftable transmission (at least two-speeds). Shifting of a transmission is performed as a function of the total efficiency of the particular motor when reaching a predetermined shifting point. The transmissions attached to the electric motors are shifted, delayed in time. The shifting of the transmission attached to a first electric motor is monitored and the shifting of a transmission attached to a second motor is performed only when the shifting of the first transmission is completed. No interruption of the traction force occurs in the drive system.
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Johnson Brian L.
Voith Turbo GmbH & Co. KG
Zimmerli William R.
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