Construction vehicle provided with work equipment

A control device that controls a propulsion device that outputs propelling force, wherein said propulsion device comprises an adjustment device that can adjust said outputted propelling force on the basis of an input value that is inputted thereto, and said control device comprises:

• a storage means that stores an input value inputted to said adjustment device;
• an attitude determination means that performs attitude determination in which it is determined whether or not the present attitude of a working equipment whose attitude is variable within a predetermined attitude range, and that is for performing a construction task upon a subject of working, corresponds to a predetermined attitude within said attitude range;
• a propulsion determination means that performs propulsion determination in which it is determined whether or not the present propulsive operation of said propulsion device corresponds to a predetermined propulsive operation that is performed when performing a predetermined construction task in which an over load is imposed upon said working equipment;
• a driving force determination means that performs driving force determination in which it is determined whether or not the magnitude of the present propelling force outputted from said propulsion device corresponds to a predetermined magnitude for which, if a reaction force based upon a larger propelling force is imposed from a subject of working upon said working equipment, an over load will be imposed upon said working equipment;
• and
• a driving force control decision means that makes a decision as to whether or not to decrease said propelling force outputted from said propulsion device, on the basis of the results of said attitude determination, said propulsion determination, and said driving force determination;
• a target value determination means that determines a target value for said inputted value, if the result of the decision by said driving force decision means is affirmative;
• and
• a driving force control means that controls said propelling force outputted from said propulsion device by determining an input value to be inputted to said adjustment device on the basis of the target value determined by said target value determination means and the input value stored in said storage means, and by inputting said input value that has been determined to said adjustment device.

A control method that controls a propulsion device that outputs propelling force, wherein said propulsion device comprises an adjustment device that can adjust said outputted propelling force on the basis of an input value that is inputted thereto, and in which:

• said input value inputted to said adjustment device is stored;
• attitude determination is performed, in which it is determined whether or not the present attitude of a working equipment whose attitude is variable within a predetermined attitude range, and that is for performing a construction task upon a subject of working, corresponds to a predetermined attitude within said attitude range;
• performs propulsion determination in which it is determined whether or not the present propulsive operation of said propulsion device corresponds to a predetermined propulsive operation that is performed when performing a predetermined construction task in which an over load is imposed upon said working equipment;
• performs driving force determination in which it is determined whether or not the magnitude of the present propelling force outputted from said propulsion device corresponds to a predetermined magnitude for which, if a reaction force based upon a larger propelling force is imposed from a subject of working upon said working equipment, an over load will be imposed upon said working equipment;
• and:
• a decision is made as to whether or not to reduce the propelling force outputted from said propulsion device, on the basis of the results of said attitude determination, said propulsion determination, and said driving force determination are all affirmative;
• if the result of said decision is affirmative, said target value for said input value is determined;
• and
• an input value to be inputted to said adjustment device is determined on the basis of said target value that has been determined and on the basis of said stored input value, and said propelling force outputted from said propulsion device is controlled by inputting said input value that has been determined to said adjustment device.