小型柴油机在农业机械中占有重要地位,故对其经济性的要求较高。本文以农用发动机油耗率最低化为设定控制目标,直接反馈运转中的油耗率,寻求最低油耗运转的喷油正时的最佳控制。试制系统由轻油喷射量和喷油正时两种控制系组成,试验机为小型农用预燃室式单缸机。试验是通过改变发动机转速和扭矩进行的。通过实机试验来评价试制系统效果,并对欠缺之处寻求改进方案。 Small diesel engines occupy an important position in agricultural machinery, so the higher the economic requirements. In this paper, the minimum control of fuel consumption for agricultural engines is set as the control objective, and the fuel consumption rate in operation is directly fed back to seek the best control of fuel injection timing with the lowest fuel consumption. The trial system consists of two control systems, light oil injection quantity and fuel injection timing. The testing machine is a small agricultural pre-combustion chamber type single-cylinder machine. The test is done by changing the engine speed and torque. Through the real machine test to evaluate the effectiveness of the trial system, and the lack of seek improvement programs.