Patent ID: 8510002

Claim:
An engine speed control device for a motor grader, the 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 comprising: an upper limit engine speed control unit configured to control an upper limit engine speed depending on the speed stage of the transmission such that: the upper limit engine speed is set to an out-of-service travelling-use upper limit engine speed when the transmission is in the at least one high speed stage; and the upper limit engine speed is set to a working-use upper limit engine speed when the transmission is in 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.