Patent Number: 7,134,261

Title: Hybrid type working machine

Abstract: In the working machine wherein the output of an engine generator is directly supplied to a motor for travel without using the intermediary of a battery, preventing the engine from slowing down. The generator G is directly connected to the motor 7 and there is no battery that stores the output of the generator G. CPU 102 decreases the power supply for the motor 7 when it has been anticipated that the engine revolutions will be decreased. The number of the engine revolutions is detected according to the period of the waveform of an output of the generator G. The alternating current waveform that has been drawn out from one phase of the winding of the generator G is shaped into a rectangular waveform. CPU 102 detects the period of the shaped waveform. When the detected period has become larger, the CPU 102 determines that the engine revolutions is about to decrease.

Inventors: Inui; Tsutomu (Saitama, JP), Kanke; Hiroo (Saitama, JP), Wakitani; Tsutomu (Saitama, JP), Kawakami; Toshiaki (Saitama, JP)

Assignee: Honda Motor Co., Ltd.

International Classification: A01D 34/64 (20060101)

Expiration Date: 2019-11-14 0:00:00