초록 ▼

The foot-operated accelerator develops digital signals progressively larger in number as the accelerator is moved through its range from a rest position to full speed. A variable transmission has a sensor that generates digital signals progressively larger in number as the transmission is shifted fr

The foot-operated accelerator develops digital signals progressively larger in number as the accelerator is moved through its range from a rest position to full speed. A variable transmission has a sensor that generates digital signals progressively larger in number as the transmission is shifted from a low gear ratio to a high gear ratio. For starting the vehicle, the accelerator lower digital signals cause successive connection of a plurality of batteries in series until the full operating battery voltage is applied to the motor. Thereafter, the motor operates at a constant voltage and vehicle speed is varied by varying the gear ratio of the transmission. This is achieved by a digital comparator that compares the accelerator numbers with the transmission numbers, and a lower accelerator number causes the transmission to shift to a lower gear ratio, and a higher accelerator number causes the transmission to shift to a higher gear ratio until equilibrium is reached in each case. The motor is protected from excessive current and excessive rpm by varying the gear ratio. Regenerative braking is utilized on both coasting and manual application of the brakes.

대표청구항 ▼

A control system for a vehicle controlled by an operator-movable accelerator movable through a range of distance from a rest position to a full power position, said vehicle being driven by a rotary electric motor through a variable transmission variable from a high gear ratio to a low gear ratio, sa

A control system for a vehicle controlled by an operator-movable accelerator movable through a range of distance from a rest position to a full power position, said vehicle being driven by a rotary electric motor through a variable transmission variable from a high gear ratio to a low gear ratio, said vehicle having a plurality of batteries, comprising: (a) accelerator means for generating digital signals of progressive numbers dependent upon the position of the accelerator in its range; (b) transmission means for generating digital signals of progressive numbers dependent upon the gear ratio of the transmission; (c) a transmission actuator for changing the transmission to a higher or lower gear ratio; (d) a comparator connected to the actuator and to the accelerator means and the transmission means to compare the signals from the accelerator means and the transmission means to operate the transmission actuator to a higher gear ratio when the accelerator number exceeds the transmission number and to operate the transmission actuator to a lower gear ratio when the transmission number exceeds the accelerator number, (e) and switching means responsive to positions of said accelerator for successively connecting said batteries in series to the motor to obtain a higher voltage as the accelerator is moved toward a greater power position, said transmission numbers being more than the accelerator numbers until at least some of said batteries are connected in series to the motor. A control system for a vehicle controlled by an operator-movable accelerator movable through a range of distance from a rest position to a full-power position and controlled further by an operator-movable brake, said vehicle being driven by a rotary electric motor, said motor also being capable of generating electricity when mechanically driven, said motor being connected to a variable transmission variable from a high gear ratio to a low gear ratio, said vehicle having a source of current, comprising: (a) a normally open battery switch closed by manually advancing the accelerator to connect the current source to the motor when the accelerator is advanced past its rest position, and which opens when the accelerator is released; (b) brake switch operated by the brake to operate the battery switch to connect the current source to the motor when the brake is operated; (c) and a generator voltage sensor interposed between the brake switch and the battery switch to prevent closing of the battery switch except when the generator voltage exceeds the voltage of the current source and to render the brake switch inoperable when the generated voltage of the motor is less than the voltage of the current source; (d) means for varying the gear ratio of the transmission; (e) and a regenerative current sensor connected to the means for varying the gear ratio, to thereby vary the motor rpm to obtain a selected range of regenerative current.