Hitachi Construction Machinery Co., Ltd.

Hironori Itou

Takenori Hiroki

Hisashi Tago

Daiki Machida

Tomoya Murazumi

Gen Yasuda

Yasumaro Komiya

Ryou Takaichi

Junya Matsumoto

A work machine includes an object detection device, a photo shooting device, and a controller that controls starting of a prime mover. The controller determines whether or not an object exists around a machine body on the basis of a detection signal arising from detection by the object detection device. The controller starts the prime mover in a case in which a prime mover starting command has been acquired from an external information terminal and when it is determined that an object does not exist around the machine body. The controller transmits data of video shot by the photo shooting device and a starting approval request of the prime mover to the external information terminal without starting the prime mover in the case in which the prime mover starting command has been acquired from the external information terminal and when it is determined that an object exists around the machine body. The controller starts the prime mover when acquiring an approval command to the starting approval request of the prime mover from the external information terminal.

Work machine and remote operation system of work

A plus-side main connection line () connects electrical equipment (), () to a plus terminal (A) of a battery (). A plus-side isolating switch () is provided in the plus-side main connection line () to connect or disconnect the electrical equipment (), () and or from the plus terminal (A) of the battery (). A plus-side auxiliary connection line () connects a urea SCR controller () to the plus terminal (A) of the battery () in a position upstream of the plus-side isolating switch (). A minus-side main connection line () connects a minus terminal (B) of the battery () to ground. A minus-side isolating switch () is provided in the minus-side main connection line () to connect or disconnect the minus terminal (B) of the battery () and or from ground.

Construction machine

A plus-side main connection line () connects electrical equipment (), () to a plus terminal (A) of a battery (). A plus-side isolating switch () is provided in the plus-side main connection line () to connect or disconnect the electrical equipment (), () and or from the plus terminal (A) of the battery (). A plus-side auxiliary connection line () connects a communication terminal () to the plus terminal (A) of the battery () in a position upstream of the plus-side isolating switch (). A minus-side main connection line () connects a minus terminal (B) of the battery () to ground. A minus-side isolating switch () is provided in the minus-side main connection line () to connect or disconnect the minus terminal (B) of the battery () and or from the ground.

A reduction in measurement accuracy of a concentration sensor is minimized. An exhaust gas purifying device of a work machine includes a reduction catalyst that is placed in an exhaust flow passage of an exhaust gas of an engine and uses a reducing agent to reduce and purify nitrogen oxides in the exhaust gas, and a reducing agent injector to inject the reducing agent into the exhaust flow passage. The exhaust gas purifying device of a work machine includes: a storage unit that stores the reducing agent; a concentration sensor that has a sensing part placed within the storage unit to detect a concentration of the reducing agent; an air-bubble removal device that injects the reducing agent toward the sensing part; and a reducing agent pump that supplies the reducing agent in the storage unit to the air-bubble removal device.

Growing community of inventors

Kasumigaura, Japan

Hironori Itou