Komatsu Corporation

Hirohito Hagiwara

Naoto Ikeda

Takeshi Kamimae

Toshihiro Yone

Yukihisa Sakai

Kengo Yamamoto

Haruki Shinagawa

Yuki Okamune

Hiroki Nagasaki

A motor grader includes a front frame, a rear frame, an actuator that pivots the front frame with respect to the rear frame, an operator operation apparatus, a display apparatus, and a controller. The controller causes the display apparatus to show any one of an image showing a state of pivot and an image different from the image showing the state of pivot, based on a signal from the operator operation apparatus.

Motor grader and representation control method

A work vehicle includes a vehicular body and a work implement including a blade. The vehicular body includes a controller that controls an operation of the work implement and an acceleration sensor. The controller controls a blade propulsive angle θ of the blade based on an output from the acceleration sensor.

Work vehicle and control method

A work vehicle includes an operation apparatus, a transmission having a plurality of gear positions, and a controller configured to control shift of a gear position of the transmission to a gear position equal to or lower than a shift upper limit position based on a vehicle speed of the work vehicle. The controller makes setting to raise the shift upper limit position by one position based on a first operation having been performed onto the operation apparatus. The controller changes the shift upper limit position from a first shift upper limit position immediately before a second operation different from the first operation to a second shift upper limit position based on the second operation having been performed onto the operation apparatus. The second shift upper limit position is higher than the first shift upper limit position by at least two positions.

A work vehicle includes a cab, a driver's seat disposed inside the cab, a first steering device, a second steering device, a seating sensor, and a control unit. The first steering device is disposed in front of the driver's seat. The first steering device is configured to perform a steering operation of the vehicle. The second steering device is disposed to a side of the driver's seat. The second steering device is configured to perform a steering operation of the vehicle. The seating sensor detects whether or not an operator is sitting in the driver's seat. The control unit disables the steering operation with the second steering device when the seating sensor detects that the operator is not sitting in the driver's seat.

Work vehicle

An engine speed control device is adapted to control a motor grader including a transmission with a plurality of manually shiftable low speed stages and at least one high speed stage, the transmission being configured to switch between a manual mode for manually selecting one of all the speed stages and an automatic shifting mode for automatically shifting a predetermined speed stage and higher. The engine speed control device includes an upper limit engine speed control unit configured to set an upper limit engine speed to be an out-of-service travelling-use upper limit engine speed at the at least one high speed stage, and set the upper limit engine speed to be a working-use upper limit engine speed at any one of the low speed stages, the working-use upper limit engine speed being lower than the out-of-service travelling-use upper limit engine speed.

Growing community of inventors

Tokyo, Japan

Hirohito Hagiwara