Komatsu Corporation

Hayato Matsumoto

Mitsuhiro Shimazu

Yoshiki Kami

Katsuhiro Ikegami

Yuki Shimano

Hiroshi Sawada

Kazuyoshi Morimoto

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

The present invention includes a stroke sensor which is arranged on a hydraulic cylinder and measures a stroke length of the hydraulic cylinder; a rotary encoder and a magnetic force sensor which measure a reset reference point to reset a value of the stroke length measured by the stroke sensor; a stroke end detection processing unit which detects a stroke end position of the hydraulic cylinder; a calibration processing unit which calibrates the measured value of the stroke length when the reset reference point and/or the stroke end position is detected; an HMI monitor which displays an entire work machine mounted with the hydraulic cylinder when an initial calibration work for the hydraulic cylinder is carried out; and a highlight display processing unit that highlights a moving portion to drive a hydraulic cylinder to be calibrated along with an indication of a driving direction.

Apparatus and method for assisting hydraulic cylinder stroke initial calibration work

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 stroke operation calibration control device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; a malfunction detection unit outputting an error when the stroke length is in the predetermined measurement range; and a control unit prohibiting the reset until the stroke length has passed the reset reference point at power input time.

Stroke operation calibration control device for hydraulic cylinder and stroke operation calibration control method for hydraulic cylinder

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

A stroke operation diagnosis supporting device for a hydraulic cylinder includes: movable portions; hydraulic cylinders; a stroke sensor measuring a stroke length of the hydraulic cylinder; a reset sensor measuring a reset reference point at which a measurement value of the stroke length obtained by the stroke sensor is reset; a stroke end detection process unit detecting a stroke end position of the hydraulic cylinder; a calibration process unit calibrating the measurement value of the stroke length upon the detection of the reset reference point and/or the stroke end position; and a monitor displaying on a screen at least the measurement value of the stroke length obtained by the stroke sensor and a calibration state obtained by the calibration process unit, wherein the monitor displays continuous time change of the measurement value of the stroke length obtained by the stroke sensor.

Stroke operation diagnosis supporting device for hydraulic cylinder

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

In a crawler construction machine including an engine and a fuel adjustment dial that adjusts a speed of the engine according to operation loads of the working equipment, the fuel adjustment dial is a rotary notchless dial that is continuously variably adjustable. The crawler construction machine includes: an adjustment position detector that detects a rotation adjustment position of the fuel adjustment dial; an engine controller that is connected to the adjustment position detector and controls the speed of the engine based on an adjustment position of the fuel adjustment dial; and a display device that is connected to the engine controller and displays on a screen a percentage value of the adjustment position of the fuel adjustment dial in which the maximum rotation position of the fuel adjustment dial is defined as 100%.

Growing community of inventors

Hiratsuka, Japan

Hayato Matsumoto