Power controller and method for hydraulic power system

Abstract

The invention discloses a power controlling device and way for a hydraulic power system, which is used for a hydraulic power system for which an engine supplies power, and comprises a main-pump pressure sensor arranged at the outlet of the main pump of the hydraulic system for detecting the system pressure, a pilot pressure sensor arranged at the outlet of the pilot handle for detecting the pilot pressure; a load calculator for receiving the output values from the main-pump pressure sensor and the pilot pressure sensor, and calculating the demanded load power; a throttle setter for receiving the demanded load power and selecting the corresponding control strategy depending upon the demanded load power and the current operation condition of the machine, determining the openness setpoint for the engine throttle and outputting the setpoint to the throttle to control the engine throttle according to the control strategy and actual demanded load power. The device in the invention can control the engine to work on a proper operation point, so that the power output matches with the power demand for the engine, and optimal energy saving can be achieved.

Description

technical field [0001] The invention relates to the hydraulic field, in particular to a power control device of a hydraulic power system. The invention also provides a power control method of the hydraulic power system. Background technique [0002] In construction machinery, hydraulic power systems are mostly used to perform mechanical operations. In order to better realize the control of mechanical operations, it is necessary to implement appropriate power control devices for hydraulic power systems. [0003] In the traditional throttling control system, the hydraulic system keeps the flow of the main pump constant, and the handle controls the main valve core to take out one oil from the total flow for the actuator to work, and the remaining oil heats up. This system actually only uses a part of the hydraulic oil as the oil for actual work, resulting in low system efficiency. [0004] In order to realize the real-time matching of the power of the hydraulic system and th...

AI Technical Summary

Problems solved by technology

[0009] Therefore, although the load-sensing control realizes the real-time matching of the power of the hydraulic system and the external load, and achieves the goal of high efficiency and energy saving, the load-sensing control ignores the power matching of the hydraulic system and the power source, and does not realize the global power matching of the power transmission system. best control

Images