Diagnostics of hydraulic density of plunger couple of tractor diesel

Tatyana Bodyakina,Alexey Shisteev,Mihail Buraev,Petr Boloev

doi:10.1051/e3sconf/202017505035

Tatyana Bodyakina, Alexey Shisteev + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202017505035

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Abstract

The article considers the process of developing diagnostic mathematical models that take into account the influence of the hydraulic density of the plunger pair associated with wear. To estimate leaks of precision parts, methods for calculating the cycle feed for wear of plunger pairs are presented. The position of the cut-off edge relative to the hole changes due to the injection movement and rotation of the plunger during the regulation of the fuel cycle. The method and results of accelerated testing of plunger pairs are also presented.

Highlights

The ability to conduct maintenance, diagnose the main elements of military equipment, which include the power plant
As a result of the simulation of the fuel supply process, it was found that one of the parameters for monitoring the state of precision TA units can be the registration of pressure changes in the fuel injection line, depending on the angle of rotation of the camshaft of the injection pump or the crankshaft of the internal combustion engine [15]
The maximum fuel supply is carried out when the diesel is fully loaded or in the mode of its free acceleration from minimum to maximum crankshaft speed, when the engine is fully loaded by inertia

Summary

Introduction

The ability to conduct maintenance, diagnose the main elements of military equipment, which include the power plant. One of the main components of the power plant is the fuel system. The main unit of the diesel fuel system is a high pressure fuel pump. Work on dosing the amount of injected fuel in the high-pressure fuel pump performs a plunger pair (PP). In the process of technical operation, the main unit that determines the level of functional reliability of the injection pump is PP. The main reason for wear is abrasive particles that enter the supraplunger space and into the gap between the plunger and the sleeve during disassembly of the injection pump assembly. Depreciation leads to a loss of hydraulic density and, as a consequence, to problems such as difficulty starting the diesel engine, deterioration of the working process in the cylinder, and dilution of oil by fuel [1]

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