scholarly journals FULL-FLOW COMBINED BY FILTRATION AND BY CENTRIFUGATION THIN CLEANING OF MOTOR OIL IN SHIP DIESELS

2018 ◽  
pp. 62-69
Author(s):  
Gennadiy Petrovich Kicha ◽  
Liudmila Anatolievna Semeniuk
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Cleaning System ◽  
Purification System ◽  
Marine Diesel ◽  
Oil Purification

The article gives analysis of the advantages and disadvantages of cleaning engine oil in internal combustion engines by filtration and centrifugation. The principles of increasing the efficiency of fine oil purification by combining these methods are formulated. The scheme of a perspective system for fine cleaning of engine oil is presented, which most fully realizes the advantages of full-flow filtration and centrifugation for a two-circuit lubrication system of forced internal combustion engines. The operating conditions of diesel engines are shown, under which the advantages of filtration and centrifugation can be realized to the full. The indices for the specific productivity index and capacity of the centrifugal cleaner are calculated, contributing to the attainment of the minimum wear rate of the engine parts and the maximum service life of the filter elements. Prospects for the application of a full-flow fine engine oil purification system in forced engines with a sequential connection of purification units with different principles of separation of complex heterogeneous polydisperse systems, which include the products of contamination of lubrication systems, are outlined. Particularly effective is the use of the developed combined fine-cleaning system in marine diesel engines with increased rotational speed, operating on screw characteristics. The results of motor tests in the ship's trunk boosted diesels of the new combined lubrication oil fine cleaning system are reported. The results of operational tests in the marine diesel engine ДД108 (8ЧСПН 18/22) of a combined engine oil purification system have been analyzed, which combine the advantages of a full-flow filter and a centrifuge with a discharge head connected in series. The parameters of efficient regular and experienced combined engine oil cleaning system are compared with the effect on aging, wear and varnish and lacquer formation of a diesel engine.

scholarly journals Analysis of mechanical energy losses in marine diesels

2021 ◽  
Vol 5 (2(61)) ◽  
pp. 26-32
Author(s):  
Sergii Sagin ◽  
Volodymyr Madey ◽  
Tymur Stoliaryk
Keyword(s):  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Structural Characteristics ◽  
Internal Combustion ◽  
Engine Oil ◽  
Lubricant Layer ◽  
Combustion Engines ◽  
Engine Oils ◽  
Boundary Lubricant ◽  
Marine Diesel

The object of research is marine diesel engine oils, which provide lubrication, cooling and separation of friction surfaces. The subject of the research is the process of ensuring minimum mechanical losses in marine diesel engines. A problematic point in ensuring the lubrication of the cylinder-piston group and motion bearings is the lack of analytical and experimental studies that establish the relationship between the structural characteristics of engine oils and mechanical losses arising in marine internal combustion engines. The degree of orientational ordering of molecules and the thickness of the boundary lubricating layer are considered as the structural characteristics of engine oils. The determination of these values was carried out using the optical method based on the anisotropy of the light absorption coefficient by the boundary lubricant layer and the isotropic volume of the liquid (engine oil). The assessment of the level of mechanical losses arising in marine diesel engines was carried out according to an indirect indicator – the overshoot of the rotational speed and the time to reach the steady state of operation in the event of a change in load. It has been experimentally established that for engine oils used in marine internal combustion engines, the thickness of the boundary layer can be 15–17.5 µm. Motor oils, which are characterized by a higher ordering of molecules and a thickness of the boundary lubricant layer, ensure the flow of transient dynamic processes with less overshoot and a shorter transient time. This ensures the level of minimal mechanical losses occurring in marine diesel engines. The technology for determining the structural characteristics of engine oils can be used for any type and grade of oil (mineral or synthetic; high or low viscosity; used in both circulating and cylinder lubrication systems). The method of indirect assessment of mechanical losses of marine diesel engines can be used for any types of internal combustion engines of ships of sea and river transport (low-, medium- and high-speed; as well as performing the functions of both main and auxiliary engines).

A Statistical Assessment of the Stochastic Modeling of Torsional Vibratory Loads in Internal Combustion Engines

1995 ◽  
Vol 39 (01) ◽  
pp. 76-85
Author(s):  
Dimitrios V. Lyridis ◽  
Michael G. Parsons ◽  
Anastassios N. Perakis
Keyword(s):  
Diesel Engine ◽  
Stochastic Modeling ◽  
Internal Combustion Engines ◽  
Statistical Tests ◽  
Internal Combustion ◽  
Marine Diesel Engine ◽  
Combustion Engines ◽  
Statistical Assessment ◽  
Marine Diesel ◽  
Point Estimators

A statistical assessment of the stochastic modeling of torsional vibratory loads in internal combustion engines is performed, based on (temperature) factory testbed data, for each cylinder of four 16-cyl Colt-Pielstick PC2V type engines at various speeds. Several statistical tests are carried out to examine the hypothesis that the random variables describing the cylinder-to-cylinder variability in marine diesel engine shafting systems are independent and identically (normally) distributed, as assumed in previous work of the authors and other researchers. It is concluded that these assumptions cannot be rejected. Finally, point estimators are derived for the coefficient of variation of the cylinder-to-cylinder variability, and their values are compared to the values proposed elsewhere, which are found to be rather high.

scholarly journals Application of Synthetic Filters from Polypropylene in Diesel Locomotive Oil Systems to Improve the Efficiency of Cleaning Engine Oil

2018 ◽  
Vol 7 (4.3) ◽  
pp. 162 ◽  
Author(s):  
Oleksandr Babanin ◽  
Oleksandr Butskiy ◽  
Oleksandr Kovalenko ◽  
Maksym Maksimov
Keyword(s):  
Service Life ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Diesel Locomotive ◽  
Synthetic Materials

The questions of application of synthetic materials as filtering, in oil systems of internal combustion engines are considered in the article. In existing oil systems, diesel engines of internal combustion use filtering elements that provide limited protection of oil systems from particles of potentially dangerous dimensions and, therefore, wear. They are not designed to work for a long service life with the higher level of oil purity required at the present time. The urgency of these issues is caused by the need to improve the quality of engine oil cleaning and, as a consequence, to increase the reliability of the engine. The use of filter elements made of porous, fibrous polypropylene is proposed. Which, according to the results of the experiment, will allow to extend the service life of the filter elements and improve the quality of their operation. 

scholarly journals Improvement of the technology for controlling the parameters of the lubricating system of the D-245 diesel engine

2020 ◽  
pp. 163-171
Author(s):  
S.V. Timokhin ◽  
◽  
Yu.V. Rodionov ◽  
I.I. Kurbakov ◽  
◽  
...  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Lubrication System

А significant factor affecting the reliability of the internal combustion engine and its technical and Economic indicators is the efficiency of the lubrication system. When the standard oil supply is applied, semiliquid friction occurs between the contacting parts, in which the parts are not completely separated by a layer of oil. However, with this friction, the required durability of components and parts with heat removal is guaranteed. The performance of the engine lubrication system is determined by the state of its elements (coarse and fine filters, oil radiator and pump, valves), as well as the quality of oil, its level in the internal combustion engine crankcase and temperature. In domestic internal combustion engines, the minimum oil level in the crankcase is controlled, but in operation there are situations when the oil level exceeds its maximum permissible value. This situation occurs when coolant or fuel enters the lubrication system. Coolant can get into the oil if the cylinder head gaskets, sleeve o-rings, or cracks in the cylinder head and block are broken. Top-Livo can enter the oil through worn and damaged parts of the fuel equipment (gas pump diaphragm, fuel pump plunger pairs, etc.). These liquids sharply degrade the quality of the oil and increase the wear of internal combustion engine parts, and the standard singlelevel indicator will not give the driver operational information about the malfunction. In connection with the above, the purpose of this work is to improve the technology for monitoring the technical condition of the internal combustion engine lubrication system on the example of the d-245 diesel engine and its modifications, which are widely used in GAZ (GAZ-3309), ZIL (ZIL-5301), MAZ (MAZ Zubrenok), PAZ buses (PAZ-3205), MTZ tractors (MTZ — 100, 892, 1020), agricultural and construction equipment.by developing and implementing a built — in device for monitoring the minimum and maximum oil levels in the crankcase, as well as its temperature. The scientific novelty of the work is due to the use of new circuit and technical solutions, as well as the original algorithm of the sensor operation developed by the authors, based on the use of switching laws of reed switches with normally closed and normally open contacts, the operation of which is spaced over time and controlled oil levels. Block diagram of the proposed device comprises a multifunction sensor level and oil temperature, including sensors of the mi-minimum and increased levels of engine oil in the crankcase of the engine and its temperature, the operation mode switch signal cooling temperature-edusei fluid and engine oil, the first and second voltage сomparators, indicator lights, buzzer, switch power supply, voltage regulator and regular temperature sensor coolant. The use of the developed device significantly increases the reliability and convenience of monitoring one of the most important indicators of internal combustion engines-the oil level in the crankcase, which will avoid significant engine damage. As a result of further research, it is planned to develop the device design, conduct laboratory studies of the developed multifunctional sensor in order to determine the dependence of its resistance on the temperature at the normal level of engine oil in the measuring flask, as well as determine the actual values of the developed sensor response heights at the lower and upper levels.

scholarly journals METHODS OF INCREASING EFFICIENCY OF THIN CLEARING ENGINE OIL BY IMPROVING FILTERING NONWOVENS IN OIL PURIFIERS OF MARINE DIESEL ENGINS

2018 ◽  
pp. 31-41
Author(s):  
Andrei Veniaminovich Nadezkin ◽  
Gennadiy Petrovich Kicha ◽  
Liudmila Anatolievna Semeniuk
Keyword(s):  
Service Life ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Specific Capacity ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Resource Saving ◽  
Marine Diesel ◽  
Oil Purification ◽  
Filtering Element

The article presents the results of motor tests of mass production filtering elements and new ones with improved performance in marine diesel engines. The filtering elements help to increase the efficiency of cleaning the engine oil and to lessen the engine wear and carbonation. The extended diesel service life is directly connected to the quality of oil purification. There has been carried out the analysis of developing filter technology regarding to engine oil cleaning in lubrication systems of ship medium-speed internal combustion engines equipped with different oil cleaners on the vessels of the Far Eastern basin. There have been presented the methods of increasing the throughput, dirt capacity and service life, as well as the fineness and completeness of sifting filtering elements due to the use of new filter materials. The dependence of the oil filtration rate on the efficiency of its purification is shown. Oil purification process can be intensified by means of decreasing the rate of oil filtering. To obtain the optimal filtering rate it is necessary to choose the appropriate size of a filtering element. Nowadays, the production technology of filtering elements is constantly improving, parameters of filtering materials are being upgraded, such as porosity, specific capacity, etc. There have been proposed measures to improve the hydraulic and filtering characteristics of nonwovens from cellulose and synthetic fibers of different thicknesses with different fillers and binders, which increases the permeability of papers, the number of pores per unit surface and a narrower distribution in diameter. New scientific and technical solutions are presented, which increase the efficiency of oil use in diesel engines. The ways of reducing the wear rate of the main parts in the engine due to full-flow fine cleaning of lubricating oil providing economical resource-saving operation of the trunk diesel engines are shown. The Russian industry manufactures the full-flow filtering elements and filtering materials relevant to the best international analogues.

scholarly journals Cordunum pistons increase diesel engine economy and reliability

2019 ◽  
pp. 28-37
Author(s):  
Andriy Marchenko ◽  
Volodymyr Shpakovskyy ◽  
Volodymyr Volikov
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Engines ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Ceramic Coatings ◽  
Fuel Combustion ◽  
Combustion Engines ◽  
Piston Group ◽  
Cylinder Piston

Taking into account the oil resources depletion the requirements to fuel consumption of internal combustion engines are now increasing as well as to their reliability and durability. With the continual increase in the number of internal combustion engines in operation, along with the problem of parts of the cylinder piston group wearing out has caused exhaust from such engines to be one of the main source of harmful pollutant emissions in cities. Therefore, environmental requirements have in turn increased dramatically. The engine resource and its efficiency largely depend on the process of fuel combustion in the combustion chamber. Experimental studies aimed to improve the working process on diesel engines by piston insulation have shown an effective decrease in fuel consumption by reducing heat loss and more complete fuel combustion. When oxide ceramic coatings were used on the piston and cylinder head, the maximum power increased and the specific fuel consumption decreased. However ceramic coatings are not widely used due to their peeling. We have developed a technology for the galvanic plasma treatment of pistons, which made it possible to obtain on the pistons surface made of aluminum alloys a ceramic corundum layer with high adhesion to the base metal that does not peel and has electret properties. In 1993, pistons with a corundum surface layer were installed in a shunting diesel locomotive and life-time running tests were conducted. Such pistons increased wear resistance, reduced the wear of cylinder liners, increased the strength of the annular jumpers, and were not prone to burnouts and scuffing. They provided an increase in the resource of the cylinder-piston group of the diesel engine by more than 125 thousand engine hours. The paper provides an analysis of the effect of corundum pistons thermal insulation on significant increasing the, engine power and fuel consumption reduction. Basing on experimental bench studies of a gasoline engine, a tractor diesel engine and long-term operational life tests of diesel engines, an attempt had been made to explain the reasons for the improvement in the engines’ efficiency.

scholarly journals SURVEY OF METHODS OF CALCULATING PARAMETERS OF MARINE DIESEL OPERATING CYCLE

2018 ◽  
pp. 89-100
Author(s):  
Mikhail Sergeevich Kurlenko ◽  
Alexander Aleksandrovich Budin ◽  
Aleksandr Dorokhov ◽  
Nikolay Vasilievich Selivanov
Keyword(s):  
Diesel Engines ◽  
High Speed ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Thermal Design ◽  
Combustion Engines ◽  
Operating Cycle ◽  
Method Of Calculation ◽  
Marine Diesel ◽  
Operation Cycle

The need in research works on improving working process of internal combustion engines requires analyzing parameters of operation cycle. The aim of the study is to create a generalized technique for calculating the high-speed cycle diesel engines under different ways of working processes based on well-researched and reliable methodology based on using dependencies containing the general parameters of the engine performance. With the development of technology, particularly, engine manufacturing and evolution of engineering thought, by combining and add-on workflow operationalization of internal combustion engines there was received a reliable Grinevetskiy-Mazing technique of engineering calculations as a general system. Professor V.I. Grinevetskiy in his thermal design offered a pre-set temperature of residual gases Т г and cylinder filling factor ηN and gave formulas to calculate the starting compression temperature coefficient γг. The follower of V.I. Grinevetskiy, E.K. Mazing offered to evaluate the temperature of residual gases Т г and residual gas coefficient γг, and to calculate temperature of starting pressure Та and filling coefficient ηN introducing value of temperature Т′ 0 (air wormed by cylinder walls) into Grinevetskiy equation system. Today there are various software analytical complexes with different capacity (number of integrated functions), assignment (analysis, diagnostics, check calculation, design etc.), as well as basic method of calculation, which is the basic principle of the whole logic complex. Grinevetskiy-Mazing technique that has passed evolution of specifications and complements made in the course of time forms the basis of calculating method of operation cycle of marine diesel engines.

The effects of DLC-coated journal on improving seizure limit and reducing friction under engine oil lubrication

2021 ◽  
pp. 146808742110129
Author(s):  
Hidemi Ogihara ◽  
Takumi Iwata ◽  
Yuji Mihara ◽  
Makoto Kano
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Efficiency ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Main Bearing ◽  
Dlc Coating ◽  
Lubrication Regime ◽  
Mixed Lubrication Regime ◽  
Reduce Emissions

Internal combustion engines have been improved markedly in recent years through efforts to conserve resources, reduce emissions and improve fuel efficiency. In this regard, the authors have been working to reduce friction and improve the seizure properties of the crankshaft main journal and main bearing. These mechanical components of internal combustion engines incur large friction losses. In order to reduce friction, journals have been coated with a diamond-like carbon (DLC) coating, which has been reported to reduce friction in the fluid lubrication regime in recent years. Another current issue of journals and bearings is the need to improve seizure resistance. Therefore, these properties were evaluated for material combinations of aluminium alloy bearings and DLC-coated journals, which have low affinity. The results revealed that friction was reduced under a fluid lubrication regime and seizure resistance was improved under a mixed lubrication regime.

Overview of engine oil replacement technologies in internal combustion engines of agricultural machinery

2020 ◽  
pp. 10-16
Author(s):  
S.A. Belov ◽  
I.V. Busin
Keyword(s):  
Economic Efficiency ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
The State ◽  
Engine Oil ◽  
Combustion Engines ◽  
Lubrication System ◽  
Agricultural Machinery ◽  
High Quality

The article reviews four existing technologies for replacing engine oil and a method for determining its suitability for improving economic efficiency. It is established that the oil is replaced according to the need in accordance with the defect indicators. This technology of oil condition is characterized by a more complete use of its resource. The frequency of replacement is determined by the indicators of condition, which is monitored by special sensors built into the engine lubrication system. However, the difficulty of using this technology is due to the lack of high-quality devices for monitoring the state of running engine oil in the engine.

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