Kobelco Construction Machinery Co., Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Hiroshi Togo

Yoichiro Yamazaki

Naoki Sugano

Hidekazu Oka

Hideki Kinugawa

Takao Nanjo

Kazuomi Endo

Kazuhiko Fujii

Ryo Hamamoto

Yuuji Matsuura

Nobuyoshi Hataoka

Tomohiro Nakagawa

A diagnostic device for an exhaust gas aftertreatment device includes a temperature detection device that detects a filter inlet-side temperature and a filter outlet-side temperature, a differential pressure detection device that detects a differential pressure between a filter inlet-side pressure and a filter outlet-side pressure, an intake air pressure detection device that detects an intake air pressure of an engine, and a controller that determines a malfunction in an exhaust gas aftertreatment device based on values detected by the temperature detection device, the differential pressure detection device, and the intake air pressure detection device.

Diagnostic device for exhaust gas aftertreatment device, diagnostic method for exhaust gas aftertreatment device, and diagnostic program for exhaust gas aftertreatment device

A vehicle-side control unit determines whether a long distance communication mechanism is available or not, when determining that the long distance communication mechanism is available, controls a first vehicle-side communication unit to transmit operation data via the long distance communication mechanism, and when determining that the long distance communication means is not available, causes a vehicle-side storage unit to store the operation data, and further determines whether a transmission start command is received from a tablet or not, and when determining that the transmission start command is received, controls a second vehicle-side communication unit to transmit the operation data stored in the vehicle-side storage unit via a short distance communication mechanism.

Construction machinery, mobile information terminal for acquiring operation data from construction machinery, construction machinery information communication system, and program implemented on mobile information terminals

A hydraulic drive device capable of utilizing return oil effectively while maintaining a driven speed of a hydraulic actuator, as well as a working machine having the hydraulic drive device, are provided. The hydraulic drive device includes a controller. During an external force applying period in which a return oil pressure exceeds a discharge pressure from a hydraulic pump, the controller specifies a regenerating flow rate capable of being conducted to a regeneration oil passage and a surplus flow rate other than the regenerating flow rate on the basis of power required of the hydraulic pump out of return oil other than return oil which is conduced to a tank through a control valve, then conducts the return oil of the regenerating flow rate to the regeneration oil passage and controls an MO valve and a regulator so that the return oil of the surplus flow rate is conducted to an outlet oil passage.

Hydraulic drive device and working machine with the same

A control device includes an arm cylinder having a cylinder body and a piston that slides inside the cylinder body and a pump that supplies working oil to the arm cylinder, and decelerates the piston when it approaches a stroke end of the arm cylinder by adjusting a supply rate of the working oil supplied from the pump to the arm cylinder and a discharge rate of the working oil discharged from the arm cylinder. The position at which the piston starts decelerating is set further from the stroke end as the moving speed of the piston becomes higher.

Control device for hydraulic cylinder and operating machine including control device

Controlling device for controlling rotational speed of engine of

Growing community of inventors

Hiroshima, Japan

Hiroshi Togo