Power plants – System having plural motors or having diverse types of...
Patent
1983-05-26
1984-11-20
Husar, Stephen F.
Power plants
System having plural motors or having diverse types of...
180 652, F01B 2104
Patent
active
044831480
ABSTRACT:
A vehicle speed control device for use in a trolley-assisted dump truck of a single phase alternating current system can control the driving torque in proportion to the amount of depression of an accelerator pedal in the same manner as in the case of running under an engine mode condition even when running under a trolley mode condition utilizing a commercial power source. The device comprises in combination an accelerator valve for controlling compressed air from a reservoir in proportion to the amount of depression of an accelerator pedal, an engine throttle control unit controlled by the compressed air passed through the accelerator valve, an acceleration pattern generator actuated by the compressed air to convert the air pressure into a voltage, a mode converted for sending out a voltage pattern to a main drive circuit of the truck in response to a voltage signal from the acceleration pattern generator, and an engine control solenoid operated valve for selectively controlling supply of the compressed air to the engine throttle control unit and to the acceleration pattern generator.
REFERENCES:
patent: 3704760 (1972-12-01), Maruyama
patent: 4400997 (1983-08-01), Fiala
Husar Stephen F.
Kabushiki Kaisha Komatsu Seisakusho
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