Assessing Thermomechanical Fatigue of a Cast Aluminum Alloy Cylinder Head of an Internal Combustion Engine

2020 ◽  
Author(s):  
Yi Liu ◽  
Pallavi Annabattula ◽  
Seyed Mirmiran ◽  
Lin Zhang ◽  
Jim Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Thermomechanical Fatigue ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum

Variability of Surface Strengthening of Aluminum Cylinders of Internal Combustion Engines

2021 ◽  
Vol 54 ◽  
pp. 12-22
Author(s):  
Nikolay F. Kolenchin ◽  
Denis V. Denisenko
Keyword(s):  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Field Potential ◽  
Internal Combustion ◽  
Electrolytic Cell ◽  
Phase Changes ◽  
Aluminum Surface ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Interelectrode Gap

This article discusses the ways of intensification of the oxidation process with the formation of surface properties necessary to increase the service life of one of the parts of an internal combustion engine - a cylinder made of cast aluminum alloy. A brief overview of existing technologies for hardening the aluminum surface is presented. Environmentally friendly options are proposed for using the potential of processes that have accumulated energy within an electrolytic cell by activating the interelectrode gap and forming an oxide with desired properties. The main difference from the existing model approaches of oxide formation lies in the parallel excitation of the main participant in the process, oxygen, in order to dominate it over other, oxygen-containing donors. Ways of using the energy of cavitation phenomena due to acoustic resonance in an electrolytic solution are proposed. Redistribution of the field potential by replacing a flat cathode with a pointed one changed the conductivity conditions in the interelectrode gap as a result of the electroconvective action. The structure of the oxide layer, phase changes, and physical properties confirming the originality of oxide coatings have been investigated.

Computer simulation of the technology for AK4-1 alloy die forging production for an internal combustion engine piston

2020 ◽  
pp. 24-31
Author(s):  
I. L. Konstantinov ◽  
P. G. Potapov ◽  
S. B. Sidelnikov ◽  
D. S. Voroshilov ◽  
Yu. V. Gorokhov ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Aluminum Alloy ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Die Forging ◽  
Real Process ◽  
3D Software ◽  
Hot Die Forging ◽  
Deform 3D

The process of hot die forging of AK4-1 aluminum alloy billets for the piston of an internal combustion engine (ICE) for an unmanned aerial vehicle (UAV) was simulated using the Deform-3D software package. The object of research was an ICE piston mounted on one of the UAV types of Russian production. Simulation was performed using the following parameters: tooling and billet temperature was 450 °C, ambient temperature was 20 °C, punch speed was 5 mm/s, and Siebel friction index was 0.4. Rigid plastic medium was chosen as a material model. The number of elements (6000) was selected so that at least 3 elements fit in the narrowest section of the part. Thus, as illustrated by the piston die forging, computer simulation in the Deform-3D software makes it possible to develop hot die forging processes for making aluminum alloy billets for UAV ICE pistons. At the same time, computer simulation can be used to evaluate the power parameters of the hot die forging process, study the nature of billet forming in die forging, make necessary adjustments to the virtual process, and develop the design of a die forging tool in order to select the most effective process solutions when designing a real process. The described computer simulation technique can be extended to other aluminum alloy die forgings.

scholarly journals Analysis of Load in the Cylinder Head Bolts of an Internal Combustion Engine

1978 ◽  
Vol 21 (159) ◽  
pp. 1395-1401
Author(s):  
Masakazu SAKISAKA ◽  
Kazuo MARUYAMA ◽  
Akira YAMAMOTO
Keyword(s):  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Combustion Engine ◽  
Internal Combustion

Metal Transfer from Piston Rings to Cylinders during “Run-in”

1949 ◽  
Vol 3 (1) ◽  
pp. 169-175
Author(s):  
C. D. Strang ◽  
J. T. Burwell
Keyword(s):  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Piston Ring ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Cylinder Wall ◽  
Piston Rings ◽  
Engine Operation ◽  
Small Water ◽  
Engine Cylinder

Piston rings with radio-active wearing-surfaces were used to study the micro-welding between rings and cylinder wall during “run-in” in a small, water-cooled, internal combustion engine. The results indicated that micro-welding and the accompanying transfer of metal were present under the mildest conditions of engine operation, including motoring with the engine cylinder-head removed. The distribution of micro-welding along the ring-travel was found to correspond to the wear profile observed in engine cylinders by other workers. Such transferred material may play a part in the formation of the “glazed” layer which is said to be present on “run-in” cylinder walls and rings. The presence of transferred metal at all points along the ring-travel indicates that the piston ring was not fully supported by a hydrodynamic oil film of sufficient thickness to separate completely the surfaces of the ring and the cylinder wall.

scholarly journals Analisa Kerusakan Cylinder Head pada Diesel Engine QSK 50 MCRS Di Bengkel Sungai Sembilan Nunukan

Syntax Idea ◽  
2021 ◽  
Vol 3 (7) ◽  
pp. 1656
Author(s):  
Ismail Ramli ◽  
Al Amin Al Amin ◽  
Muhammad Huzairi
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Cylinder Head ◽  
Combustion Engine ◽  
Internal Combustion

Diesel Engine adalah motor bakar pembakaran dalam (Internal Combustion Engine), yang bahan bakarnya disemprotkan ke dalam ruang silinder pada waktu piston berada di titik mati atas (TMA). Penelitian ini bertujuan untuk mengetahui permasalahan yang terjadi pada kepala silinder, khususnya pada mesin QSK 50 MCRS, sehingga perawatan kepala silinder lebih baik, guna mengoptimalkan pengoperasian mesin dalam proses industri. Penelitian ini dilakukan untuk mendapatkan data guna mengetahui penyebab kerusakan kepala silinder pada mesin QSK 50 MCRS. Ada beberapa langkah yang dilakukan termasuk pembersihan, inspeksi visual, dan pengukuran dan analisis kerusakan pada kepala silinder. Hasil penelitian ini menunjukkan bahwa ada erosi selama proses pembersihan komponen. Ada kerusakan pada setiap permukaan ruang pembakaran di kepala silinder. Karakteristik kerusakan menunjukkan bahwa telah terjadi erosi kavitasi pada permukaan ruang pembakaran. Erosi kavitasi terjadi pada permukaan ruang pembakaran karena gelembung udara yang meledak atau meledak selama stroke daya dari siklus empat stroke mesin. Erosi kavitasi ditandai dengan permukaan dengan lubang kecil. Analisis kepala 16 silinder QSK 50 MCRS menunjukkan bahwa semua kepala silinder masih dapat digunakan lagi, karena kepala silinder masih dalam cakupan standar yang ditetapkan dalam manual.

scholarly journals Evaluation of the partitioned mechanical properties and the hall-petch relationship of cast aluminum alloy cylinder head

2022 ◽  
Vol 355 ◽  
pp. 01003
Author(s):  
Kangjie Yan ◽  
Weiqing Huang ◽  
Zhengxing Zuo ◽  
Jinxiang Liu ◽  
Peirong Ren ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Yield Strength ◽  
Nonlinear Model ◽  
Cylinder Head ◽  
Floor Plate ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Petch Relationship

In view of the non-uniform distribution of mechanical properties of cast aluminum alloy cylinder head, the mechanical properties evaluation and microstructure heterogeneity of cylinder head were studied. The results showed that the head plate position of the cylinder head has the best mechanical properties and microstructure characterization, followed by the floor plate and the thick partition plate. The mechanical properties of the floor plate position attenuate with increasing temperature. From 23°C to 300°C, the tensile strength and yield strength decrease in the same range, but the break elongation changes most obviously. The mechanical properties and microstructure characterization of cylinder head in-situ sampling satisfy the Hall-Petch relationship. If the required ultimate tensile strength is not less than 255MPa, the upper threshold of the grain size, by considering the error limit of the Hall-Petch relationship, is 603.4μm, and the upper threshold of secondary dendrite arm spacing is 69.1μm. Meanwhile, established the relationship between hardness and yield strength, the average error of the nonlinear model is 4.35%. The prediction accuracy of the nonlinear model is sufficient to meet the actual needs of the engineering.

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.

The Resistance of Air-Cooled Engines

1930 ◽  
Vol 34 (238) ◽  
pp. 803-812
Author(s):  
F. M. Green
Keyword(s):  
Internal Combustion Engine ◽  
Cylinder Head ◽  
High Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Heat Energy ◽  
Exhaust Gases ◽  
Cooling Air

An internal combustion engine divides the heat energy obtained from its fuel into three fairly equal parts. About one-third of the energy becomes useful work; rather more than one-third escapes into the atmosphere in the exhaust gases : and rather less than one-third gives its heat to the cylinders and pistons. As its name implies, an air-cooled engine is one in which the cylinders are cooled directly by air. While the engin.e can and does part with a small amount of its heat by radiation, the bulk of the heat is carried away by air moving more or less rapidly over the surface of the cylinders and cylinder head, which are provided with fins in order to increase the surface in contact with the air. As the loss of heat is nearly proportional to the velocity of the cooling air the faster the aeroplane goes the better will a given engine be cooled; consequently, on a high-speed aeroplane it would be permissible to reduce the area of the cylinders in contact with the air; that is to say, we might save weight by reducing the size and number of fins or, alternatively, the velocity of air over the cylinders need not be equal to the speed of the aeroplane.

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