Construction equipment
A construction equipment includes a lower traveling body; an upper rotating body rotatably supported on the lower traveling body; a work machine which includes a boom, an arm, and a bucket operated by their respective hydraulic cylinder, wherein the work machine is supported by the upper rotating body; a control valve for controlling the hydraulic cylinder; an electronic proportional pressure reducing valve for controlling the spool of the control valve; an operation lever for outputting an operation signal corresponding to an operation amount of a driver; an information providing unit for providing information on the work machine and the work surface; and an electronic control unit for calculating and outputting a pilot pressure for the electronic proportional pressure reducing valve, wherein the electronic control unit controls the speed of the hydraulic cylinder by using the operation signal of the operation lever and the information provided by the information providing unit.
1 . A construction equipment, comprising:
a lower traveling body;
an upper rotating body rotatably supported on the lower traveling body;
a work machine which comprises a boom, an arm, and a bucket operated by their respective hydraulic cylinder, wherein the work machine is supported by the upper rotating body;
a control valve for controlling the hydraulic cylinder;
an electronic proportional pressure reducing valve for controlling a spool of the control valve;
an operation lever for outputting an operation signal corresponding to an operation amount of a driver; and
an electronic control unit (ECU) for calculating and outputting a pilot pressure for the electronic proportional pressure reducing valve,
wherein the electronic control unit controls a speed of the hydraulic cylinder by using the operation signal of the operation lever and information related to the work machine; wherein the electronic control unit receives at least one of a speed required for driving the boom, a moment of inertia of the work machine, and an engine maximum output, wherein the moment of inertia of the work machine includes the moment of inertia of at least one of the boom, the arm, or the bucket of the work machine;
wherein the electronic control unit compares the moment of inertia of the work machine with a reference value;
wherein the electronic control unit sets a set value as an arm speed increase rate when the moment of inertia of the work machine is less than or equal to the reference value, and reduces the arm speed increase rate when the moment of inertia of the work machine exceeds the reference value.
2 . A construction equipment, comprising:
a lower traveling body;
an upper rotating body rotatably supported on the lower traveling body;
a work machine which comprises a boom, an arm, and a bucket operated by their respective hydraulic cylinder, wherein the work machine is supported by the upper rotating body;
a control valve for controlling the hydraulic cylinder;
an electronic proportional pressure reducing valve for controlling a spool of the control valve;
an operation lever for outputting an operation signal corresponding to an operation amount of a driver; and
an electronic control unit (ECU) for calculating and outputting a pilot pressure for the electronic proportional pressure reducing valve,
wherein the electronic control unit controls a speed of the hydraulic cylinder by using the operation signal of the operation lever and information related to the work machine,
wherein the electronic control unit receives at least one of a speed required for driving the boom, a moment of inertia of the work machine, and an engine maximum output, wherein the moment of inertia of the work machine includes the moment of inertia of at least one of the boom, the arm, or the bucket of the work machine,
wherein the electronic control unit compares the engine maximum output with a reference value,
wherein the electronic control unit sets a predetermined set value as an arm speed increase rate when the engine maximum output is greater than or equal to the reference value, and reduces the arm speed increase rate when the engine maximum output is less than the reference value.
3 . A construction equipment, comprising:
a lower traveling body;
an upper rotating body rotatably supported on the lower traveling body;
a work machine which comprises a boom, an arm, and a bucket operated by their respective hydraulic cylinder, wherein the work machine is supported by the upper rotating body;
a control valve for controlling the hydraulic cylinder;
an electronic proportional pressure reducing valve for controlling a spool of the control valve;
an operation lever for outputting an operation signal corresponding to an operation amount of a driver; and
an electronic control unit (ECU) for calculating and outputting a pilot pressure for the electronic proportional pressure reducing valve,
wherein the electronic control unit controls a speed of the hydraulic cylinder by using the operation signal of the operation lever and information related to the work machine,
wherein the electronic control unit receives a speed required for driving the boom, a moment of inertia of the work machine, and an engine maximum output, wherein the moment of inertia of the work machine includes the moment of inertia of at least one of the boom, the arm, or the bucket of the work machine,
the electronic control unit compares the speed required for driving the boom, the moment of inertia of the work machine, and the engine maximum output with a reference value,
the electronic control unit sets a first set value as a first arm speed increase rate when the speed required for driving the boom is less than or equal to the reference value, and the electronic control unit sets a value obtained by multiplying the first set value by a first decrease rate as the first arm speed increase rate when the speed required for driving the boom exceeds the reference value,
the electronic control unit sets a second set value as a second arm speed increase rate when the moment of inertia of the work machine is less than or equal to the reference value, and the electronic control unit sets a value obtained by multiplying the second set value by a second decrease rate as the second arm speed increase rate when the moment of inertia of the work machine exceeds the reference value, and
the electronic control unit sets a third set value as a third arm speed increase rate when the engine maximum output is greater than or equal to the reference value, and the electronic control unit sets a value obtained by multiplying the third set value by a third decrease rate as the third arm speed increase rate when the engine maximum output is less than the reference value.
4 . The construction equipment of claim 3 , wherein the electronic control unit sets a smallest value among the first arm speed increase rate, the second arm speed increase rate, and the third arm speed increase rate as the arm speed increase rate.
5 . The construction equipment of claim 3 , wherein the electronic control unit sets a value obtained by multiplying any one of the first set value to the third set value by the first decrease rate to the third decrease rate as an arm speed increase rate.
6 . A construction equipment, comprising:
a lower traveling body;
an upper rotating body rotatably supported on the lower traveling body;
a work machine which comprises a boom, an arm, and a bucket operated by their respective hydraulic cylinder, wherein the work machine is supported by the upper rotating body;
a control valve for controlling the hydraulic cylinder;
an electronic proportional pressure reducing valve for controlling a spool of the control valve;
an operation lever for outputting an operation signal corresponding to an operation amount of a driver; and
an electronic control unit (ECU) for calculating and outputting a pilot pressure for the electronic proportional pressure reducing valve,
wherein the electronic control unit controls a speed of the hydraulic cylinder by using the operation signal of the operation lever and information related to the work machine,
wherein the electronic control unit receives a speed required for driving the boom, a moment of inertia of the work machine, and an engine maximum output, wherein the moment of inertia of the work machine includes the moment of inertia of at least one of the boom, the arm, or the bucket of the work machine,
the electronic control unit compares the speed required for driving the boom, the moment of inertia of the work machine, and the engine maximum output with a reference value,
the electronic control unit sets a first set value as a first boom speed increase rate when the speed required for driving the boom is less than or equal to the reference value, and increases the first boom speed increase rate when the speed required for driving the boom exceeds the reference value,
the electronic control unit sets a second set value as a second boom speed increase rate when the moment of inertia of the work machine is less than or equal to the reference value, and the electronic control unit increases the second boom speed increase rate when the moment of inertia of the work machine exceeds the reference value, and
the electronic control unit sets a third set value as a third boom speed increase rate when the engine maximum output is greater than or equal to the reference value, and increases the third boom speed increase rate when the engine maximum output is less than the reference value.
7 . The construction equipment of claim 6 , wherein the electronic control unit sets a largest value among the first boom speed increase rate, the second boom speed increase rate, and the third boom speed increase rate as the boom speed increase rate.