Saving in Fuel Consumption of Marine Diesel Engine and Countermeasures for Degrading Future Fuel(Minor Special Issue on the Fuel Economy in Internal Combustion Engines)

1980 ◽  
Vol 83 (744) ◽  
pp. 1393-1398
Author(s):  
Ken SAEKI
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Fuel Economy ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Marine Diesel Engine ◽  
Combustion Engines ◽  
Special Issue ◽  
Marine Diesel

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 DETERMINATION OF COMPLEX FUEL-ECOLOGICAL CRITERION FOR DIESEL WORKING ON WATER-FUEL EMULSION

2021 ◽  
pp. 31-37
Author(s):  
A.P. Marchenko ◽  
I.V. Parsadanov ◽  
A.V. Savchenko
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Environmental Performance ◽  
Alternative Fuels ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Specific Fuel Consumption ◽  
Injection Timing ◽  
Boost Pressure ◽  
Combustion Engines

Today, internal combustion engines are very common as energy sources in many countries around the world. This makes the tasks related to improving the environmental performance of internal combustion engines relevant. The introduction of alternative fuels in internal combustion engines is an effective way to reduce their negative impact on the environment. One of the most available and widespread alternative fuels for diesels is a water-fuel emulsion. The use of water-fuel emulsion makes it possible to reduce the specific fuel consumption of petroleum origin, as well as to achieve a significant reduction in emissions of harmful substances from diesel exhaust. However, due to differences in the physical properties of traditional diesel fuel and water-fuel emulsion, the course of the processes of mixture formation and combustion in the diesel cylinder changes significantly. This may be due to the emergence of a reserve for further improvement of the diesel engine by selecting the parameters of the diesel engine running on water-fuel emulsion. The study selected the following parameters for variation: compression ratio, boost pressure, duration of the injection process, injection timing. The article considers the influence of these parameters on the Brake-specific fuel consumption of diesel, the specific emission of particulate matter and nitrogen oxides, the maximum pressure in the cylinder. The nature and degree of influence of changes in the parameters of the diesel engine on its performance was determined using mathematical modeling. It should be noted that the influence of each of the parameters selected for variation is quite complex and often ambiguous. That is, when some indicators improve, others may deteriorate somewhat. Therefore, in order to select the most rational parameters of a diesel engine running on a water-fuel emulsion, it is necessary to simultaneously assess the economic and environmental performance of the diesel engine. For this assessment, a method was used to determine a comprehensive fuel and environmental criterion for a diesel engine running on a water-fuel emulsion. Thus, the article shows the potential for comprehensive improvement of environmental and economic performance of the diesel engine by choosing rational parameters.

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 Thermal Management Opportunity on Lubricant Oil to Reduce Fuel Consumption and Emissions of a Light-Duty Diesel Engine

2021 ◽  
Vol 312 ◽  
pp. 07023
Author(s):  
Davide Di Battista ◽  
Fabio Fatigati ◽  
Marco Di Bartolomeo ◽  
Diego Vittorini ◽  
Roberto Cipollone
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Management ◽  
Internal Combustion Engines ◽  
Thermal Stabilization ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Warm Up ◽  
Lubricant Oil ◽  
Light Duty

The high viscosity of the lubricant oil in internal combustion engines at cold starts is responsible for poor friction reduction and inadequate thermal stabilization of metallic masses and represents a major bottleneck in the efforts to reduce specific fuel consumption and pollutant emissions. Consequently, the possibility of integrating techniques for proper thermal management of the lubricant oil on internal combustion engines is of utmost importance to both homologation and daily on-road operation. Main options for reducing the warm-up time for the engine lubricant are the upgrade of the engine cooling and lubricating circuits, dedicated heating, different flow management of the oil/coolant heat exchanger, a renewed design of the oil sump or a thermal storage section to increase the oil temperature in the early phases of the warm up. The paper presents a new opportunity, using a hot storage medium to heat up the oil in the early phase of a driving cycle. A certain quantity of hot water, so, is stored in a tank, which can be used to warm up the lubricating oil when the engine is started up. The heating of this service water can be done by using exhaust gas heat, which is always wasted in the atmosphere. The activity is realized on an IVECO 3.0 L light-duty diesel engine, during a transient cycle (NEDC) on a dynamometric test bench. The benefits in terms of both fuel consumption and CO2 emissions reduction. The characterization of the backpressure associated with an eventual additional heat exchangers and the more complex layout of the oil circuit is assessed, as well as the transient effects produced by the faster oil warm-up and oil-coolant interaction on the engine thermal stabilization.

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