초록 ▼

A control method of a system for generating hydraulic power, the system including an internal combustion engine controlled by fuel injection from a fuel injection pump, and a plurality of hydraulic pumps of the variable displacement type. An engine speed deviation is obtained by calculating a differ

A control method of a system for generating hydraulic power, the system including an internal combustion engine controlled by fuel injection from a fuel injection pump, and a plurality of hydraulic pumps of the variable displacement type. An engine speed deviation is obtained by calculating a difference between a target engine speed set by a manipulated variable of an accelerator for the internal combustion engine and an output engine speed of the engine. The engine speed deviation is converted into a pump control coefficient which is in a functional relation with this deviation. A calculation is performed with the converted value and an externally manipulated variable for inclination of a swash plate of the hydraulic pump, and the calculated value is supplied to a regulator of the hydraulic pump as a target value for inclination of the swash plate thereof to thereby control the inclination angle of the swash plate of the hydraulic pump. At the same time, the engine speed deviation is converted into a rack displacement target value which is a functional relation with this deviation, and the rack displacement of the fuel injection pump is adjusted by the converted value to thereby control the amount of fuel injection.

대표청구항 ▼

A method of controlling a system for generating hydraulic power, the system including an internal combustion engine controlled by fuel injection by a fuel injection pump, and a plurality of hydraulic pumps of the variable displacement type driven by the internal combustion engine, the method compris

A method of controlling a system for generating hydraulic power, the system including an internal combustion engine controlled by fuel injection by a fuel injection pump, and a plurality of hydraulic pumps of the variable displacement type driven by the internal combustion engine, the method comprising the steps of calculating a difference between a target engine speed set by a manipulated variable of an accelerator for the internal combustion engine and an output engine speed to obtain an engine speed deviation; converting the engine speed deviation into a pump control coefficient which is in a functional relation with the engine speed deviation, performing a calculation with the converted pump control coefficient and an externally manipulated variable for inclination of a swash plate of the hydraulic pumps, and inputting the calculated value to a regulator of the hydraulic pump as a target value for inclination of the swash plate thereof to thereby control the inclination angle of the swash plate of the hydraulic pumps; and simultaneously converting said engine speed deviation into a rack displacement value which is in a functional relation with the engine speed deviation, and adjusting rack displacement of the fuel injection pump by the converted value to thereby control the amount of fuel injection.