ENGINEERING MANAGEMENT OF DIAGNOSTIC PARAMETERS OF GRAIN HARVESTER ENGINES
Abstract
The article formulates methodical approaches of engineering management regarding the diagnostic parameters of engines of grain harvesters. It is noted that the numerical value of the advance angle of fuel supply is one of the main parameters of a combine diesel engine. The main technical and economic indicators of the engine – power and economy - depend on the accuracy of setting the advance angle of fuel supply. After 900-1000 hours of engine operation, the precisely set numerical value of the fuel advance angle decreases. In this regard, it is recommended to check the fuel advance angle during the third maintenance, when a new or repaired high-pressure fuel pump is installed on the engine. Changing the angle of advance of the fuel supply in the direction of increase or decrease affects mainly the duration of the fuel ignition delay. This leads to a change in engine power and efficiency, the average temperature of the cycle, the temperature of the exhaust gases and the temperature of the outer surface of the exhaust pipe. The authors developed the positioning of the diagnostic device, mastered by specialists of the diagnostic group, which must meet the following requirements: multi-functionality and registration of several parameters; ease of use and portability; accumulation of data - measurement results; informativeness of the indicator screen; expert-informational programs: built-in and external (computer); specialized built-in programs. The article provides approaches regarding the poor technical condition of the fuel equipment during operation, which can be the following main problems in the operation of a diesel engine: the diesel engine does not start, does not develop normal power, operates unstable, smoke emission is observed. It should be borne in mind that these problems can be caused by the malfunction of other diesel units. Therefore, when finding the reason for the unsatisfactory operation of the diesel engine, together with the fuel equipment, other units of the tractor that can cause similar problems should be checked.
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