Patent GB-191207133-A (GB)
Title: Improvements in Electro-mechanical Transmissions Sytems for Vehicles.
Inventor: PIEPER HENRI
IPC: B60L50/16
Filed: 1912-03-23
Granted: 1913-02-06
Abstract: 7133. Pieper, H. April 29, 1911, [Convention date]. Electro-mechanical apparatus, arrangements of.-Comprises an arrangement in which the vehicle is driven by two independent sets of internal-combustion motors, one set driving the wheels directly for normal running, the other set driving through an electrical transmission and being used for starting and for speed regulation and when extra power is required. Fig. 1 shows one form of the invention. All the axles are coupled, and one axle 2 is driven directly by a motor 9 while another axle 4 is driven by a dynamo-electric machine 18 supplied with power by another machine 15 driven by an internal-combustion motor 14. A buffer battery 24 can be connected through a switch 23 to the machine 15 and supplies the exciting-circuits to both dynamo-electric machines through switches 21, 22. To start the vehicle, the compression of the motor 9 is released and the motor 14 is started by the machine 15 receiving electricity from the battery. The battery switch 23 is then opened and the machine 18 is started by current from the machine 15, so propelling the vehicle. The voltage of the dynamo 15 is raised to increase the speed of the motor 18 by regulation of the field switch 21. When the vehicle attains a speed sufficient to start the motor 9, the compression of this motor is restored and it now works with the other. The battery 24 is again switched in when the voltage of the dynamo is the same as that of the battery, and the speed is thereafter regulated by means of the switch 22. While the battery and dynamo are thus connected up, they work regeneratively. The motor 9 is normally worked at full power, the speed being regulated by the electrical group. In the arrangement shown in Fig. 4, the dynamo 15 is only connected up to the motor 18, and the battery is connected to another dynamo 26. At starting, the motor 14 is rotated by the dynamo 26 working as a motor on the battery current, the switch 23 being opened as before when the motor 14 has started. This motor now drives the dynamo 15 and through it the electric motor 18, the speed of which is regulated by the field switches 28, 29. When abnormal power is required, it is furnished by the battery, the dynamo 26 working as a motor. On the other hand, if an excess of power is supplied by the motor 14, the surplus is stored in the battery by the dynamo 26. This also happens when the motor 18 is driven by the vehicle and the dynamo 15 runs as a motor. When powerful electric motors of large dimensions are employed to produce rapid starting, they may be disconnected, automatically or by hand, before,dangerous peripheral speeds are reached. The Specification as open to inspection under Section 91 (3) (a) comprises also the application to vehicles in which the power is primarily furnished by heat motors, such as steam-engines or turbines. Power may thus be supplied to motors on the engine tender or to a carriage on the train. This subject - matter does not appear in the Specification as accepted.