关键词: 液压挖掘机；单片机；节能；控制

Abstract:

There exist lots of energy losses in hydraulic excavator during its load frequently changing in various operation states. In order to reduce those energy losses and improve excavator performance, a control system for hydraulic excavator engine was designed. Taking advantages of the monitor ability and control ability of single chip computer, the control device took the hydraulic system pressure of the excavator as a criterion to make a stepper motor control the engine throttle to a proper position, so that without any changes in internal structure of the engine and the excavator hydraulic system, the energy was saved. The control system provides functions of idle speed control, dynamic model control, shot time overload control and overflow control etc. and realizes the need of getting system work stably, actuator moving steady, high control precision and saving energy efficiently.

Key words: hydraulic excavator;single chip microcomputer, energy conservation, control