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介绍现代液压挖掘机的发动机和油泵联合控制方案，该方案综合了发动机的转速控制、油泵控制（ 转速感应控制） 、自动怠速控制、液压油防过热控制等功能．同时比较详细地介绍了该方案的系统组成和系统功能等，并侧重论述了挖掘机各工况控制的机理，为今后该方向进一步的开发研究提供了一定的基础
This paper introduces the joint control scheme of the engine and oil pump of modern hydraulic excavator, which integrates engine speed control, oil pump control (speed sensing control), automatic idle speed control, and hydraulic oil anti-overheating control. At the same time, the system composition and system functions of the scheme are introduced in detail, and the mechanism of excavator working conditions control is discussed in detail, providing a certain basis for further development and research in the future.