Kabushiki Kaisha Toyota Jidoshokki

Hitachi Construction Machinery Co., Ltd.

Naoki Ishikawa

Kouji Ishikawa

Masatoshi Hoshino

Manabu Edamura

Kentarou Itoga

Tsutomu Umehara

Yuusuke Kajita

Provided are a work machine, a power unit, and a diesel engine of a work machine that make it possible to reduce emitted noxious substances to levels below reference values stipulated by exhaust gas regulations in advanced countries and regions while also omitting or simplifying a post-treatment device. A hydraulic pump is driven by a diesel engine that limits maximum output torque in a low revolution speed region lower than a high revolution speed region including a rated revolution speed in such a manner that the maximum output torque has a characteristic of intermediate torque lower than torque of a maximum output horsepower point at the rated revolution speed, and a hydraulic actuator is driven by hydraulic fluid delivered from the hydraulic pump.

Work machine, power unit, and diesel engine of work machine

Growing community of inventors

Kariya, Japan

Naoki Ishikawa