Patent ID: 11913190
Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A wheel loader comprising:
a vehicle body formed by a front vehicle body and a rear vehicle body;
front wheels provided on the front vehicle body and rear wheels provided on the rear vehicle body; and
a working device attached to the front vehicle body and having a bucket used in an excavation operation,
wherein
the wheel loader further comprises:
an operation state sensor configured to detect an operation state of the bucket;
an inclination state sensor configured to detect an inclination state of the vehicle body;
a controller configured to determine a rear wheel lifting state in which the rear wheels are lifted in an upward direction by excavation reaction force of the working device, and

the controller is further configured to:
in cases where a temporal change rate of the operation state of the bucket detected by the operation state sensor is a first temporal change rate which is a temporal change rate of the operation state of the bucket necessary for a tilt operation of the bucket during the excavation operation, and where a temporal change rate of the inclination state of the vehicle body detected by the inclination state sensor is a second temporal change rate which is a temporal change rate of an obliquely upward inclination state of the rear vehicle body with respect to the front vehicle body, turn on a correlation flag indicating a correlation between the operation state of the bucket and the inclination state of the vehicle body to determine the rear wheel lifting state.