Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent
1993-02-11
1994-12-27
Ip, Paul
Electricity: motive power systems
Positional servo systems
Vehicular guidance systems with single axis control
318139, 318373, 3644262, 180282, H02P 310, H02H 317
Patent
active
053768698
ABSTRACT:
An electric vehicle drive train includes a controller for detecting and compensating for vehicle rollback, as when the vehicle is started upward on an incline. The vehicle includes an electric motor rotatable in opposite directions corresponding to opposite directions of vehicle movement. A gear selector permits the driver to select an intended or desired direction of vehicle movement. If a speed and rotational sensor associated with the motor indicates vehicle movement opposite to the intended direction of vehicle movement, the motor is driven to a torque output magnitude as a nonconstant function of the rollback speed to counteract the vehicle rollback. The torque function may be either a linear function of speed or a function of the speed squared.
REFERENCES:
patent: Re34159 (1993-01-01), Harrington
patent: 4217643 (1980-08-01), Anderson et al.
patent: 4351405 (1982-09-01), Fields et al.
patent: 4529919 (1985-07-01), Melocik et al.
patent: 4629043 (1986-12-01), Matsuo et al.
patent: 4913258 (1990-04-01), Sakurai et al.
patent: 5040088 (1991-08-01), Harrington
General Electric Company
Ip Paul
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