Hitachi Construction Machinery Co., Ltd.

Chiaki Takahashi

Shinya Imura

Ken Takeuchi

Seiji Ishida

Hiroaki Amano

Masafumi Hita

Itaru Naya

A hybrid work machine includes a controller and a temperature sensor that detects an electric storage device temperature. In a case where (Tp+Tc)&#x2265;Te_min, the controller carries out a first comparison in which the controller compares a value of [(Tp+Tc)&#x2212;Te_min] with a value of Ta_SOC, and the controller then selects a lower value of the first comparison. The controller then carries out a second comparison in which the controller compares the selected lower value of the first comparison with a value of [(Tp+Tc)&#x2212;Te_max)]. The controller then sets a higher value of the second comparison as the torque of the assist motor Ta, wherein Tc is an accessory torque, Ta_SOC is an adjustment assist motor torque based on a current state of charge of the electric storage device, Ta is the torque of the assist motor, and Te_max is an engine maximum torque.

Hybrid work machine

The hybrid construction machine includes an engine, an electric motor/generator, a hydraulic pump unit, an electricity storage device, an inverter, a temperature regulator (D orE), and a hybrid control unit. The hybrid control unitexecutes at least one of first control for controlling a warming-up battery temperature regulatorD so that it increases a temperature of the electricity storage device, second control for controlling the inverterso that it reduces the power output from the inverter, and third control for controlling a pump capacity control unitso that it reduces the flow rate of a hydraulic fluid delivered from the hydraulic pump unit, according to a charge/discharge history of the electricity storage device

Hybrid construction machine

Growing community of inventors

Hitachinaka, Japan

Chiaki Takahashi