B - Operations – Transporting – 60 – L
Patent
B - Operations, Transporting
60
L
342/34
B60L 15/20 (2006.01) B60L 11/18 (2006.01) F01B 21/04 (2006.01)
Patent
CA 1204196
ABSTRACT OF THE DISCLOSURE A vehicle speed control device for use in a trolley-assisted dump track 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 convertor 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.
428829
Kabushiki Kaisha Komatsu Seisakusho
Sim & Mcburney
LandOfFree
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