Komatsu Corporation

Mitsuhiro Shimazu

Hayato Matsumoto

Kenji Kooriyama

Masamichi Ueda

Satoru Nishimura

Takumi Nagahara

Tsuyoshi Tanaka

Seiji Kamada

Koichi Yamashita

Yuuichi Iwamoto

Shinya Komori

Shuuki Akushichi

A work vehicle including an internal combustion engine that generates power and an exhaust gas treatment device that treats exhaust gas emitted from the internal combustion engine, the work vehicle includes: a detection unit that detects an abnormality of the exhaust gas treatment device; an output restriction unit that restricts output of an output generation device included in the work vehicle when the detection unit detects the abnormality of the exhaust gas treatment device; a display control unit that causes a display unit to display information that the restriction on the output is allowed to be temporarily released; and a releasing unit that releases the restriction on the output in response to an instruction to temporarily release the restriction on the output.

Work vehicle and work vehicle display device

An operation state management system for a construction machine includes a management apparatus configured to manage an operation state of the construction machine by communicating with the construction machine and a construction machine including a cumulative value storage device configured to store a cumulative value in which an amount of operation of the construction machine is accumulated and have an adjustment function to the stored cumulative value, an adjustment existence determining unit configured to determine whether the cumulative value stored in the cumulative value storage device has been adjusted, and a communication terminal apparatus configured to communicate with the management apparatus and transmit adjustment information indicating that at least the cumulative value has been adjusted to the management apparatus when the adjustment existence determining unit has determined that the adjustment has been performed.

Construction machine and operation state management system for the same

A display device of a work vehicle is configured to alternatively display a plurality of display screens including a first display screen with a video display area and a second display screen without the video display area in accordance with an operation of a screen changeover switch, wherein upon switching from the first display screen to the second display screen for display, a temporary second display screen on which precaution information prompting to switch to and display the first display screen is displayed is displayed.

Display device of work vehicle and display method for the same

A work vehicle display device included in a work vehicle including an internal-combustion engine that generates power and an exhaust gas processing device that processes exhaust gas discharged from the internal-combustion engine using urea water, the work vehicle display device includes: a display unit configured to display an image; and a display control unit configured to display either a first image or a second image different from the first image in the display unit, wherein the display control unit displays device information having a same content related to a state of the exhaust gas processing device in the first image and the second image.

Work vehicle display device and work vehicle

An error releasing device for a work vehicle to release an error related to an exhaust gas treatment system when the error related to the exhaust gas treatment system has occurred includes: an input unit configured to input at least temporary input information; an authentication unit including a processing algorithm common with a processing algorithm of an external device that generates the temporary input information, and configured to authenticate the input temporary input information by using the processing algorithm; and an error release processing unit configured to release the error related to the exhaust gas treatment system when the temporary input information acquired from the external device by using inquiry information obtained through a predetermined operating procedure is input and further the temporary input information is authenticated by the authentication unit.

Error releasing device for work vehicle and error releasing method for work vehicle

A vehicle status notification device for a construction machine, includes: a key switch connected to a battery; an engine shut-off switch which is serially connected to a downstream side of the key switch in a connection line between the battery and an engine controller configured to control engine operation; and a control unit configured to perform control to notify a notification unit that the engine shut-off switch is in an OFF state in a case that a signal at the downstream side of the engine shut-off switch is in the OFF state while a signal at an upstream side of the engine shut-off switch is in an ON state.

Vehicle status notification device and a vehicle status notification method for a construction machine

The invention is directed to a display device for working vehicle, which is adapted so that additional information can be displayed. In the invention, display indication marks of the two types can be interchangeably displayed on a common display screen of a limited area without reducing the sizes of the individual marks, so that neither a larger size of a display device nor a drop in the visibility of the indication marks is necessary. This enables the driver to control a working machine such as a construction machine and have additional information about the construction machine without any trouble in the driving.

Display device for working machine

It is a subject of the present invention to provide a hydraulic shovel concurrently used for crane operations in which an operator may immediately be ascertained of conditions during crane operations as well as dangerous conditions occurring on the implement or the vehicle body so that operations may be performed in a stable and rapid manner, this being achieved by a hydraulic shovel concurrently used for crane operations which comprises an implement including a boom, an arm, a bucket and a hook for enabling crane operations, which further comprises a monitor device including a monitor screen, wherein a parameter display portion for displaying parameters related to load factors of safe-working load, an engine condition display portion for displaying engine conditions and an alarm information display portion for displaying alarm information are provided on the monitor screen during crane operations, wherein a plurality of display items of the alarm information display portion may be sequentially switched and displayed, and wherein the parameter display portion is turned into an alarm color when the load factor for safe-working load is within a dangerous area.

Hydraulic shovel concurrently used for crane operations

A display device that has a display screen is disclosed that has the ability to prevent reflections of the display screen from appearing on glass, without lowering the visibility of a display portion of the display screen. The brightness of the display color of either the background portionon a display screenor the background portionof such one of display portionsandas occupies the larger area of the lit portion of the display screenis changed according to the control of a control switch. If the brightness of the display color of the background portionis lowered (from the 'thin light blue' to the 'thick light blue', for example) at the nighttime, its reflection on the glass around a cabincan be reduced without lowering the luminance of the display screen. Alternatively, the saturation or hue of the display color can be changed to obtain a similar effect.

Display device for construction machine

A current control apparatus capable of accurately and stably controlling a current which is supplied to an object of control such as a coil of a solenoid even when a control target value varies greatly at a predetermined time interval. In this apparatus, a value (y ) of a current passing through the object of control ( ) is detected, and the detected current value (y ) is output at a predetermined time intervals. On the basis of a preceding corrected current value (y old) and a presently outputted current value (y ), a presently corrected current value (y ) is computed so that this value comes to be intermediate between the preceding corrected current value (y old) and presently outputted current value (y ), and the resultant current value is output. On the basis of a precedingly corrected duty (d old) and a presently outputted duty (d ), a presently corrected duty (d ) is computed so that the presently corrected duty (d ) has a value intermediate between those of the precedingly corrected duty (d old) and the presently outputted duty (d ). On the basis of a target current value (x ) to be input, the outputted corrected current value (y ) and the outputted corrected duty ( d), the duty (d ) is computed, and the result is outputted.

Growing community of inventors

Fujisawa, Japan

Mitsuhiro Shimazu