Patent ID: 11873624
Assignee: KUBOTA CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC B  E  F | IPC B  E  F

Claim 4:
5. The working machine according to claim 1, comprising:
a first circulation fluid line connecting the left traveling pump to the left traveling motor;
a second circulation fluid line connecting the right traveling pump to the right traveling motor;
a first pressure detector provided on a portion of the first circulation fluid line connected to a first port of the left traveling motor and configured to detect a first traveling pressure that is a pressure of operation fluid flowing in the portion of the first circulation fluid line connected to the first port during rotation of the left traveling motor;
a second pressure detector provided on a portion of the first circulation fluid line connected to a second port of the left traveling motor and configured to detect a second traveling pressure that is a pressure of operation fluid flowing in the portion of the first circulation fluid line connected to the second port during rotation of the left traveling motor;
a third pressure detector provided on a portion of the second circulation fluid line connected to a third port of the right traveling motor and configured to detect a third traveling pressure that is a pressure of operation fluid flowing in the portion of the second circulation fluid line connected to the third port during rotation of the right traveling motor; and
a fourth pressure detector provided on a portion of the second circulation fluid line connected to a fourth port of the right traveling motor and configured to detect a fourth traveling pressure that is a pressure of operation fluid flowing in the portion of the second circulation fluid line connected to the fourth port during rotation of the right traveling motor, wherein
the controller is configured or programmed
to perform the automatic deceleration during left pivot turn of the machine body when a third differential pressure obtained by subtracting the fourth traveling pressure from the third traveling pressure or a fourth differential pressure obtained by subtracting the third traveling pressure from the fourth traveling pressure is equal to or higher than the left threshold, and
to perform the automatic deceleration during right pivot turn of the machine body when a first differential pressure obtained by subtracting the second traveling pressure from the first traveling pressure or a second differential pressure obtained by subtracting the first traveling pressure from the second traveling pressure is equal to or higher than the right threshold.