The gross output power of an engine distributed to at least one main machine and one auxiliary machine. A total load value calculation unit calculates the value of the lost power consumed by the auxiliary machine, and calculates the value of total load power by adding to this lost power value a targ
The gross output power of an engine distributed to at least one main machine and one auxiliary machine. A total load value calculation unit calculates the value of the lost power consumed by the auxiliary machine, and calculates the value of total load power by adding to this lost power value a target value for the main output power of the engine to be distributed to the main machine. A gross output value control unit controls the value of the gross output power so that the value of the gross output power becomes equal to the value of the total load power when the value of the total load power is less than a predetermined threshold value, and so that the value of the gross output power becomes equal to the above described threshold value when the value of the total load power is greater than the threshold value.
대표청구항▼
1. An engine output control device that controls an engine that simultaneously drives at least one main machine and one auxiliary machine or more, wherein:the main machine is a travelling device or both of a travelling device and a working device among devices that are driven by output of the engine
1. An engine output control device that controls an engine that simultaneously drives at least one main machine and one auxiliary machine or more, wherein:the main machine is a travelling device or both of a travelling device and a working device among devices that are driven by output of the engine;the auxiliary machine is a device whose output is variable and which is driven by engine output of a machine other than the main machine,comprising:a total load value calculation unit that calculates a value of lost power consumed by said auxiliary machine, and calculates a value of total load power, which is the total of the power that must be supplied to said main machine and to said auxiliary machine, by adding a target value for main output power of said engine distributed to said main machine to the value of said lost power;a gross output value control unit that controls the value of gross output power outputted from said engine itself, according to the value of said total load power; andan engine drive control unit that controls the operation of said engine according to control of the value of said gross output power by said gross output value control unit;and wherein said gross output value control unit has a threshold value that is set within the range of variation of the value of said gross output power, and controls the value of said gross output power to become equal to the value of said total load power when the value of said total load power is smaller than said threshold value, while controlling the value of said gross output power to become equal to said threshold value when the value of said total load power is larger than said threshold value. 2. An engine output control device according to claim 1, wherein said total load value calculation unit changes said target value for said main output power according to rotational speed of said engine. 3. An engine output control device according to claim 1, wherein said total load value calculation unit inputs signals specifying two or more state values: from a plurality of sensors that detect respective state values of some two or more of said auxiliary machines, determines two or more candidate values for the power consumed by said some auxiliary machines on the basis of said two or more respective state values specified by said signals that are inputted;and selects the maximum value among said two or more candidate values that have been determined as the value of lost power consumed by said some auxiliary machines. 4. An engine output control device according to claim 2, wherein said total load value calculation unit inputs signals specifying two or more state values: from a plurality of sensors that detect respective state values of some two or more of said auxiliary machines, determines two or more candidate values for the power consumed by said some auxiliary machines on the basis of said two or more respective state values specified by said signals that are inputted;and selects the maximum value among said two or more candidate values that have been determined as the value of lost power consumed by said some auxiliary machines. 5. An engine output control device that controls an engine that simultaneously drives at least one main machine and one or more auxiliary machines, wherein:the main machine is a travelling device or both of a travelling device and a working device among devices that are driven by output of the engine;the auxiliary machine is a device whose output is variable and which is driven by engine output of a machine other than the main machine,comprising:a total load value calculation unit configured to store a target value for main output power,estimate actual lost power consumed by the one or more auxiliary machines, andcalculate a total load power by adding the target value to the estimated actual lost power;a gross output value control unit configured to store a threshold value that is set to be within a range of variation of a gross output power of the engine,compare the total load power to the threshold value,determine that the gross output power is equal to the total load power when the total load power is smaller than or equal to the threshold value, anddetermine that the gross output power is equal to the threshold value when the total load power is larger than the threshold value; andan engine drive control unit configured to control operation of the engine based on the gross output power determined by the gross output value control unit,whereinthe main output power is a portion of power from the engine that is distributed to the main machine,the total load power is an estimate of an amount of power to be supplied to the main machine and to the one or more auxiliary machines by the engine, andthe gross output power is an actual amount of power supplied to the main machine and to the one or more auxiliary machines by the engine. 6. An engine output control device according to claim 5, wherein the total load value calculation unit is further configured to change the target value for the main output power according to a rotational speed of the engine. 7. An engine output control device according to claim 6, wherein the one or more auxiliary machines comprise two or more auxiliary machines,the total load value calculation unit is configured to receive input signals specifying a plurality of state values from a plurality of sensors that detect respective state values of a plurality of selected machines from the two or more auxiliary machines,determine a plurality of candidate values for the power consumed by the two or more auxiliary machines on the basis of the plurality of respective state values, andselect the maximum value among the plurality of candidate values as the actual lost power. 8. An engine output control device according to claim 5, wherein the one or more auxiliary machines comprise two or more auxiliary machines,the total load value calculation unit is configured to receive input signals specifying a plurality of state values from a plurality of sensors that detect respective state values of a plurality of selected machines from the two or more auxiliary machines,determine a plurality of candidate values for the power consumed by the two or more auxiliary machines on the basis of the plurality of respective state values, andselect the maximum value among the plurality of candidate values as the actual lost power.
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이 특허에 인용된 특허 (2)
Glickman, Myron; Schmidt, Harvey E.; Olson, Daniel; Pfeifenroth, Steven, Method of obtaining required power on demand from an engine.
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