Protecting work machine from damage due to locked state
AssigneeHonda Motor Co., Ltd.
InventorKoji KURIYAGAWA
Life of this patent
Estimating the term…
Abstract
A work machine comprises an engine, a work unit configured to be driven by the engine, a clutch provided between an output shaft of the engine and a power shaft of the work unit, and configured to transmit or cut off power from the output shaft of the engine to the power shaft, a sensor configured to detect an engine speed of the engine; and a control unit configured to control the engine and the clutch based on the engine speed of the engine. The control unit predicts, based on the engine speed of the engine detected by the sensor, whether or not the work unit will become locked by a load, and control the clutch to switch over from a transmission state to a cut-off state upon predicting that the work unit will become locked.
Claims11
A work machine, comprising:
- an engine;
- a work unit configured to be driven by the engine;
- a clutch provided between an output shaft of the engine and a power shaft of the work unit, and configured to transmit or cut off power from the output shaft of the engine to the power shaft;
- a sensor configured to detect an engine speed of the engine;
- and
- a control unit configured to control the engine and the clutch based on the engine speed of the engine,
- wherein the control unit includes:
- a predicting unit configured to predict, based on the engine speed of the engine detected by the sensor, whether or not the work unit will become locked by a load;
- and
- a clutch control unit configured to control the clutch to switch over from a transmission state to a cut-off state in response to the predicting unit predicting that the work unit will become locked,
- wherein in a case where a reduction amount of the engine speed of the engine detected by the sensor is greater than a first threshold, the predicting unit predicts that the work unit will become locked.
A work machine, characterized by comprising:
- an engine;
- a work unit configured to be driven by the engine;
- a clutch provided between an output shaft of the engine and a power shaft of the work unit, and configured to transmit or cut off power from the output shaft of the engine to the power shaft;
- a sensor configured to detect an engine speed of the engine;
- and
- a control unit configured to control the engine and the clutch based on the engine speed of the engine,
- the control unit including:
- a predicting unit configured to predict, based on the engine speed of the engine detected by the sensor, whether or not the work unit will become locked by a load;
- and
- a clutch control unit configured to control the clutch to switch over from a transmission state to a cut-off state in response to the predicting unit predicting that the work unit will become locked, wherein
- in a case where the engine speed of the engine decreases, the predicting unit obtains an absolute value of a slope of the engine speed of the engine detected by the sensor, and
- in a case where the absolute value of the slope is greater than a predetermined value, the predicting unit predicts that the work unit will become locked.
A work machine, comprising:
- an engine;
- a work unit configured to be driven by the engine;
- a clutch provided between an output shaft of the engine and a power shaft of the work unit, and configured to transmit or cut off power from the output shaft of the engine to the power shaft;
- a sensor configured to detect an engine speed of the engine;
- a control unit configured to control the engine and the clutch based on the engine speed of the engine;
- a driving wheel;
- and
- a driving wheel motor configured to rotate the driving wheel,
- wherein the control unit comprises
- a predicting unit configured to predict, based on the engine speed of the engine detected by the sensor, whether or not the work unit will become locked by a load, and
- a clutch control unit configured to control the clutch to switch over from a transmission state to a cut-off state in response to the predicting unit predicting that the work unit will become locked, and
- wherein, in a case where the predicting unit predicts that the work unit will become locked, the control unit stops the driving wheel motor.
Dependencies are inferred from the claim text.