Investigation of operating modes of tractor diesel engines in real operating conditions

Shekikhachev, Yu.A.; Batyrov, V I; Balkarov, Ruslan; Shekikhacheva, Lyudmila; Hubjokov, H.L.

doi:10.33267/2072-9642-2019-4-14-19

Cited by 5 publications

(1 citation statement)

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“…Reducing coking of sprayers at the final phase of injection is possible due to [4][5][6][7]: increasing the stroke of the needle and the diameter of its shut-off cone; reducing the density in the precision sprayer couple; reducing the area of the spray ports; reducing the stroke of the needle and its shut-off cone diameter. As a criterion for coking of the spray ports, the duration of the needle fit is often taken [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of coking diesel injector spray nozzles in operation

et al. 2021

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One of the significant problems in ensuring the reliable operation of the nozzles is the intensive coking of the injector spray nozzle ports. Based on the assumption that all fuel left by injection under the needle burns, some researchers believe that the reason for coking is insufficiently emptying of this volume. There is also a well-known opinion about the impact of atomization quality at the final phase of injection. The lack of consensus and conflicting recommendations on the issue make the research relevant. A set of investigations has been carried out at OJSC “TsNITA” to study the influence of various factors, including design factors of the fuel system, on the coking of injector spray nozzle ports. This article describes the investigation results carried out on the basis of test materials for 24 variants of fuel systems on the D-240 engine, the analysis of varying parameters for the injection final phase is carried out depending on the combination of design factors and the relationship of coking of the injector spray nozzle ports with the final phase parameters is shown.

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Section: Introductionmentioning

confidence: 99%

Investigation of coking diesel injector spray nozzles in operation

et al. 2021

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Metrological and methodological support for bench studies of diesel engines

Shekikhachev

Balkarov

Chechenov

et al. 2020

J. Phys.: Conf. Ser.

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The presence of exhaust gas emissions into the environment during the operation of diesel engines is an urgent environmental problem both for the state of the atmospheric air and for agricultural crops, since the toxic substances contained in the exhaust gas are absorbed by plants and accumulated in crop production. Thus, the environmental characteristics of diesel engines are now becoming the most important indicators in their operation. The problem of improving the performance of diesel engines is solving at the present stage in the process of their production by improving and carefully working out the design schemes and technological processes associated with the manufacture of their most important parts, and in the process of operation – by improving the methods and tools used for maintenance and repair. This approach can be considered justified due to the influence of a significant number of factors (design and operational) on the performance of diesel engines. As is known, the quality characteristics of the mixture formation and the nature of the fuel combustion process depend on the fuel supply parameters. Analysing the state of the problem of improving the performance of diesel engines, we can draw the following conclusion: the main reason for the deviation of the working cycle of engines from the set values is the deviation of the fuel supply parameters from the optimal values.

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Influence of non-uniformity of fuel supply parameters on diesel engine performance

Апажев

Shekikhachev

Batyrov

et al. 2020

J. Phys.: Conf. Ser.

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The state of the fuel equipment as a whole can be judged by two generalized parameters characterizing the performance of a diesel engine - its power and specific fuel consumption. The state of the fuel equipment is characterized by the following parameters: injection pressure and the quality of fuel atomization by nozzles, the capacity of the booster pump, the throughput of filter elements for coarse and fine fuel cleaning, the state of the bypass valve, wear of the plunger pairs and discharge valves, the speed of the camshaft of the fuel pump, uneven delivery fuel by pump elements, fuel consumption, advance angle of fuel supply to engine cylinders. During operation, these parameters change due to the deterioration of the state of the elements of the fuel equipment. The initial state of the parameters of the fuel equipment is restored by making the necessary adjustments and replacing the components unsuitable for further operation. Signs of unsatisfactory operation of the fuel equipment can be: difficult start of the diesel engine, unstable operation, smoke of the exhaust gases, a decrease in power and an increase in specific fuel consumption. Improvement of diesel fuel supply systems should be aimed, first of all, at increasing power and fuel efficiency, as well as decreasing smoke and toxicity of exhaust gases, which can be achieved by: increasing the maximum injection pressure; optimization of injection characteristics and reduction of injection duration; correction of the cyclic fuel supply in accordance with the engine operating mode and external factors. With this in mind, this article presents the results of a study of the unevenness of the fuel supply and its effect on the power and economic performance of the diesel engine.

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Investigation of operating modes of tractor diesel engines in real operating conditions

Cited by 5 publications

References 0 publications

Investigation of coking diesel injector spray nozzles in operation

Investigation of coking diesel injector spray nozzles in operation

Metrological and methodological support for bench studies of diesel engines

Influence of non-uniformity of fuel supply parameters on diesel engine performance

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