Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Electric vehicle
Patent
1999-08-05
2000-04-25
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Electric vehicle
701 35, 180 651, 180 658, 395821, 395829, 395833, 395843, G60L 900
Patent
active
060554665
ABSTRACT:
An electric vehicle (10) includes a traction motor (26) which drives the wheels (30a, 30b) by way of a differential (28), if desired. The traction motor (26) is controlled by a controller (24) which responds to torque command signals, to cause the motor (26) to produce the commanded torque. An accelerator pedal (12) is coupled to a position transducer (16) which converts pedal position into digital signals. The digital signals representing pedal position are applied as addresses to a memory (22) to access the stored signals. The memory is preprogrammed with torque signals representing the torque desired at a given pedal depression. In a preferred embodiment, the preprogrammed signals represent torques which are monotonically related to the pedal position, although some deviation may be acceptable in small portions of the operating range. The memory signals resulting from a given pedal position are applied to the controller, for causing the controller to command the motor to produce the specified torque. The programmed values can be adjusted to provide the impression of a more or less "powerful" or "lively" vehicle. In one embodiment, the memory (22) can be reprogrammed on-the-fly by use of an auxiliary memory (40).
REFERENCES:
patent: 5418399 (1995-05-01), Klaue
patent: 5730238 (1998-03-01), Tamaki et al.
patent: 5828201 (1998-10-01), Hoffman, Jr. et al.
patent: 5869950 (1999-02-01), Hoffman, Jr. et al.
Beaulieu Yonel
Cuchlinski Jr. William A.
Krauss G. H.
Lockheed Martin Corp.
Meise W. H.
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