Komatsu Corporation

Kazuhiro Muruta

Hiroshi Endo

Nobumi Yoshida

Energy of returning pressurized fluid of an actuator is recovered and reused as energy for operating other accumulators. A first pump motor ( ) and a second pump motor ( ) are mechanically connected to form a pressure converter ( ), and a first circuit ( ), to which the returning pressurized fluid is supplied, is connected to the first pump motor ( ). A pressure accumulator ( ) is provided to a second circuit ( ) connected to the second pump motor ( ). The first circuit ( ) is connected to a discharge passage ( ) of a primary hydraulic pump ( ) by a third circuit ( ) and the pressure of a high pressure pressurized fluid is supplied to the discharge passage ( ) by the pressure of the high pressure pressurized fluid, and is reused.

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Tochigi, Japan

Kazuhiro Muruta