Patent ID: 11891780
Assignee: KUBOTA CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E  F  B | IPC E  F

Claim 7:
8. A working machine comprising:
a prime mover;
a traveling pump driven by power of the prime mover so as to deliver hydraulic fluid;
a traveling motor configured to be rotated by the hydraulic fluid delivered from the traveling pump so as to have a rotation speed shiftable between a first speed and a second speed higher than the first speed;
a machine body provided thereon with the prime mover, the traveling pump and the traveling motor;
a traveling change-over valve shiftable between a first state to set the rotation speed of the traveling motor to the first speed and a second state to set the rotation speed of the traveling motor to the second speed;
a speed-shift switch operable to issue a speed-shift command that is either one of an acceleration command and a deceleration command;
an actuation valve configured to control hydraulic fluid flowing to the traveling pump; and
a controller configured or programmed to selectively perform either automatic deceleration to shift the traveling change-over valve from the second state to the first state or manual deceleration to shift the traveling change-over valve from the second state to the first state according to the speed-shift command issued by the speed-shift switch, wherein
the controller is configured or programed to be capable of performing a first shock mitigation control to reduce an opening degree of the actuation valve and a second shock mitigation control to reduce the rotation speed of the prime mover.