Drive system for electrically driven vehicles
First Claim
1. A drive system for electric vehicles, characterized by an electric motor means having an excitation means, a driving battery means for supplying power to the electric motor means and adapted to be switched by a switch means from a partial voltage to the full battery voltage, a hydraulic torque converter means operatively connected with the electric motor means, and electronic control means operatively connected with the switch means and with the excitation means of the motor means, the electronic control means being controlled in response to at least one of the motor rotational speed, a driving control member and a brake control member.
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Accused Products
Abstract
A drive system for electrically driven vehicles in which an electric motor is adapted to be driven from a driving battery which is adapted to be switched by means of a switch from partial voltage to full battery voltage; an electronic control system is provided which acts on the switch as well as on the excitation of the motor and is controlled by the motor rotational speed, by a driving pedal and by a brake pedal; the electric motor then drives a hydraulic torque converter which is interposed between the electric motor and the driven wheels.
16 Citations
23 Claims
- 1. A drive system for electric vehicles, characterized by an electric motor means having an excitation means, a driving battery means for supplying power to the electric motor means and adapted to be switched by a switch means from a partial voltage to the full battery voltage, a hydraulic torque converter means operatively connected with the electric motor means, and electronic control means operatively connected with the switch means and with the excitation means of the motor means, the electronic control means being controlled in response to at least one of the motor rotational speed, a driving control member and a brake control member.
- 18. A drive system for electric vehicles, characterized by an electric motor means having excitation means, a driving battery means for supplying power to the electric motor means and adapted to be switched by a switch means from a partial voltage to the full battery voltage, a hydraulic torque converter means operatively connected with the electric motor means, and electronic control means operatively connected with the switch means and with the excitation means of the motor means, said electronic control means being responsive to at least one of the rotational speed of the electric motor means, a driving control member and a brake control member, said electric motor means being operatively connected to the partial voltage of the battery and--beginning at idling rotational speed with full excitation--being adapted to be driven for purposes of starting the vehicle by a reduction of the excitation up to substantially reaching the rated rotational speed, said electronic control means being responsive to the reaching of the rated rotational speed for controlling said switch means to switch the driving battery means to full battery voltage and for controlling the excitation means of said electric motor means to provide for full excitation at the same time, said hydraulic torque converter means including a free-wheeling means between the torque converter input and the torque converter output which blocks the taking over of the input by the output.
Specification