Direct current electric vehicle drive
First Claim
1. An improved method for operating a vehicle with a combination, of a continuously variable transmission and an electric motor, powered by a mobile electrical storage device, with the steps of supplying electrical power to said combination from said storage device, transmitting mechanical power between said electric motor and a drive wheel of said vehicle, and varying a speed ratio between said electric motor and said drive wheel in a continuous manner, the improvement comprising:
- supplying electrical potential for direct current to said motor,varying the amount of electrical potential supplied to said motor in a continuous manner, andvarying a radial distance from axis of rotation a power transmission belt rides upon a pulley to vary said speed ratio between said electric motor and said drive wheel in a continuous manner in response to motor speed and in response to motor load by communication of a biasing arrangement.
1 Assignment
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Accused Products
Abstract
An improved electrically powered vehicle and associated method of the type having a mobile electrical storage device for providing electrical power electrically connected to a switching device, for selectively controlling the flow of electric power. The switching device is electrically connected to an electric motor. It selectively allows the flow of electrical power to the motor. The motor is mechanically connected to a belt type continuously variable transmission with the transmission mechanically connected to a drive wheel of the vehicle. It is improved by the motor, being of the direct current type, that is electrically connected to a continuously variable power supply control device responsive to an operator input. Further, the motor is mechanically connected to the continuously variable transmission, with the transmission adapted to respond to the rotational speed of the motor by varying in speed ratio.
186 Citations
11 Claims
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1. An improved method for operating a vehicle with a combination, of a continuously variable transmission and an electric motor, powered by a mobile electrical storage device, with the steps of supplying electrical power to said combination from said storage device, transmitting mechanical power between said electric motor and a drive wheel of said vehicle, and varying a speed ratio between said electric motor and said drive wheel in a continuous manner, the improvement comprising:
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supplying electrical potential for direct current to said motor, varying the amount of electrical potential supplied to said motor in a continuous manner, and varying a radial distance from axis of rotation a power transmission belt rides upon a pulley to vary said speed ratio between said electric motor and said drive wheel in a continuous manner in response to motor speed and in response to motor load by communication of a biasing arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An improved electrically powered vehicle of the type having a mobile electrical storage means for providing electrical power electrically connected to a switching means, for selectively controlling the flow of electric power, said switching means electrically connected to an electric motor to which said flow of electrical power selectively flows, said motor mechanically connected to a continuously variable transmission, and said transmission mechanically connected to a drive wheel of said vehicle, the improvement comprising:
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said motor, being of the direct current type, electrically connected to a continuously variable power supply control means responsive to an operator input, and mechanically connected to a belt type continuously variable transmission, said transmission adapted to respond to rotational speed of said motor and adapted to respond to motor load by varying a speed ratio by communication of a biasing arrangement.
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11. An electrically powered vehicle comprising:
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a mobile electrical storage device for providing electrical power, said electric storage device electrically connected to a continuously variable power supply control device responsive to an operator input, said power control device electrically connected to a direct current type of electric motor, said motor mechanically connected to a belt type continuously variable transmission, said transmission mechanically connected to a drive wheel of said vehicle, and said transmission adapted to respond to rotational speed of said motor by varying a speed ratio in response to motor speed and in response to motor load by communication of a biasing arrangement.
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Specification