Work vehicle and work vehicle control method
First Claim
1. A work vehicle comprising:
- an engine;
a working implement;
a travelling apparatus driven by the engine;
a power transmission apparatus configured to transfer a driving force from the engine to the travelling apparatus, the power transmission apparatus including an input shaft, an output shaft, and a motor;
an electricity storage apparatus configured to store electricity generated by the motor;
a state display section configured to display whether the electricity storage apparatus is in a charging state or a discharging state; and
a state determination unit configured to determine the state to be displayed on the state display section on the basis of a parameter corresponding to electricity supplied to the electricity storage apparatus or electricity discharged from the electricity storage apparatus;
the power transmission apparatus being configured so that a rotation speed ratio of the output shaft with respect to the input shaft is changed by changing of a rotation speed of the motor,the state determination unit being configured todetermine whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a first threshold and the parameter when the state displayed on the state display section most recently is the charging state;
determine whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a second threshold different from the first threshold and the parameter when the state displayed on the state display section most recently is not the charging state;
determine whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a third threshold and the parameter when the state displayed on the state display section most recently is the discharging state; and
determine whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a fourth threshold different from the third threshold and the parameter when the state displayed on the state display section most recently is not the discharging state,until a predetermined first time period elapses since the state to be displayed on the state display section changes to the charging state or the discharging state, the state determination section being configured to determine the state after the change as the state to be displayed on the state display section in a case where the state determination unit cannot determine to set the state to be displayed on the state display section to either of the charging state or the discharging state by using the first to the fourth thresholds.
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Accused Products
Abstract
A state display section of a work vehicle is configured to display whether an electricity storage apparatus is in an electricity charging or discharging state. A state determination unit is configured to determine the state to be displayed on the state display section on the basis of a parameter corresponding to electricity supplied to or discharged from the electricity storage apparatus. The state determination unit is configured to change a threshold for a parameter for determining if the state to be displayed on the state display section is to be set to the charging state (discharging state) based on whether or not the state displayed on the state display section most recently is the charging state (discharging state). Until a predetermined first time period elapses, the state determination section is configured to determine the state after the change as the state to be displayed on the state display section.
8 Citations
16 Claims
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1. A work vehicle comprising:
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an engine; a working implement; a travelling apparatus driven by the engine; a power transmission apparatus configured to transfer a driving force from the engine to the travelling apparatus, the power transmission apparatus including an input shaft, an output shaft, and a motor; an electricity storage apparatus configured to store electricity generated by the motor; a state display section configured to display whether the electricity storage apparatus is in a charging state or a discharging state; and a state determination unit configured to determine the state to be displayed on the state display section on the basis of a parameter corresponding to electricity supplied to the electricity storage apparatus or electricity discharged from the electricity storage apparatus; the power transmission apparatus being configured so that a rotation speed ratio of the output shaft with respect to the input shaft is changed by changing of a rotation speed of the motor, the state determination unit being configured to determine whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a first threshold and the parameter when the state displayed on the state display section most recently is the charging state; determine whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a second threshold different from the first threshold and the parameter when the state displayed on the state display section most recently is not the charging state; determine whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a third threshold and the parameter when the state displayed on the state display section most recently is the discharging state; and determine whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a fourth threshold different from the third threshold and the parameter when the state displayed on the state display section most recently is not the discharging state, until a predetermined first time period elapses since the state to be displayed on the state display section changes to the charging state or the discharging state, the state determination section being configured to determine the state after the change as the state to be displayed on the state display section in a case where the state determination unit cannot determine to set the state to be displayed on the state display section to either of the charging state or the discharging state by using the first to the fourth thresholds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for controlling a work vehicle, which is provided with an engine, a working implement, a travelling apparatus driven by the engine, a power transmission apparatus configured to transfer driving force from the engine to the travelling apparatus, the power transmission apparatus including an input shaft, an output shaft, and a motor, an electricity storage apparatus configured to store electricity generated by the motor, a state display section configured to display whether the electricity storage apparatus is in a charging state or a discharging state, and the power transmission apparatus being configured so that a rotation speed ratio of the output shaft with respect to the input shaft is changed by changing of the rotation speed of the motor, the method comprising:
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a step of determining the state to be displayed on the state display section on the basis of a parameter corresponding to electricity supplied to the electricity storage apparatus or electricity discharged from the electricity storage apparatus, the step of determining the state to be displayed including a sub-step of determining whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a first threshold and the parameter when the state displayed on the state display section most recently is the charging state; a sub-step of determining whether or not to set the state to be displayed on the state display section to the charging state based on the magnitude relation of a second threshold different from the first threshold and the parameter when the state displayed on the state display section most recently is not the charging state; a sub-step of determining whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a third threshold and the parameter when the state displayed on the state display section most recently is the discharging state; a sub-step of determining whether or not to set the state to be displayed on the state display section to the discharging state based on the magnitude relation of a fourth threshold different from the third threshold and the parameter when the state displayed on the state display section most recently is not the discharging state; and a sub-step of, until a predetermined first time period elapses since the state to be displayed on the state display section changes to the charging state or the discharging state, determining the state after the change as the state to be displayed on the state display section in a case where it is not possible to determine to set the state to be displayed on the state display section to either of the charging state or the discharging state by using the first to the fourth thresholds.
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Specification