Technological provision of diesel cylinder face endurance

2021 ◽  
Author(s):  
A. S. Yamnikov ◽  
L. L. Safarova
Keyword(s):  
Diesel Cylinder

Microstructure and Mechanical Properties of Heat-Treated B319 Alloy Diesel Cylinder Heads

2015 ◽  
Vol 46 (7) ◽  
pp. 3276-3286 ◽  
Author(s):  
S. K. Chaudhury ◽  
D. Apelian ◽  
P. Meyer ◽  
D. Massinon ◽  
J. Morichon
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Heat Treated ◽  
Diesel Cylinder

INCREASING THE RESOURCE OF DIESEL CYLINDER HEADS BY IMPROVING THE TECHNOLOGY OF THEIR RESTORATION

2020 ◽  
Vol 15 (7) ◽  
pp. 950-957
Author(s):  
G.D. Mezhetskiy ◽  
◽  
V.A. Strelnikov ◽  
Keyword(s):  
Diesel Engines ◽  
Thermal Loading ◽  
Theoretical Calculations ◽  
Operating Conditions ◽  
Advanced Technology ◽  
Temperature Fields ◽  
Cylinder Block ◽  
Diesel Cylinder ◽  
Thermal Intensity

The article presents the results of studies of the thermal fatigue strength of diesel cylinder heads and their resource under operating conditions, by using the most advanced technology for their restoration. Based on the results of theoretical calculations of durability and operational studies, a restoration technology has been proposed, which makes it possible to increase the resource of cylinder heads by 2 ÷ 2.5 times. For this purpose, the non-uniformity of the temperature field on the firing bottom of the cylinder heads of YaMZ-238NB diesel engines was theoretically determined and experimentally confirmed. On the basis of theoretical calculations, the most heatstressed sections of the plane of the cylinder heads of diesel engines bonded to the cylinder block were determined, and the appearance of cracks in them. When developing a method for calculating the temperature fields of the fire bottom, the universal finite element method (FEM) was used. This method makes it possible to take into account the geometry and conditions of thermal loading of the cylinder heads quite accurately. For the determination of temperature fields, a well-founded assignment of the boundary conditions is crucial. With this in mind, a number of surfaces were determined that characterize the durability of the entire part during operation. As a result of calculations carried out on a computer, temperature fields have been obtained that make it possible to analyze the distribution of temperatures and temperature gradients at any point of the fire bottom. The highest temperatures (620...635K) are localized in the central part of the fire bottom, which is two times higher in thermal intensity than the peripheral one and confirms the appearance of cracks in these places during the operation of diesel cylinder heads.

scholarly journals Monitoring of Low Speed Diesel Cylinder Lubicating Condition by Drain Oil Aralysis

1999 ◽  
Vol 34 (10) ◽  
pp. 689-692
Author(s):  
Takaaki Hashimoto ◽  
Nobuhiro Baba ◽  
Hideo Aoki
Keyword(s):  
Low Speed ◽  
Diesel Cylinder

Strain Gage Tests on Diesel Cylinder Blocks, Heads, and Pistons

2009 ◽  
pp. 29-29-5
Author(s):  
C. L. Newton ◽  
J. D. Swannack
Keyword(s):  
Strain Gage ◽  
Diesel Cylinder ◽  
Strain Gage Tests

scholarly journals Dynamics of soot formation and burnout in a gas diesel cylinder

2020 ◽  
Vol 862 ◽  
pp. 062033
Author(s):  
V A Likhanov ◽  
O P Lopatin
Keyword(s):  
Soot Formation ◽  
Diesel Cylinder

scholarly journals Influence of parameters and location of the tumble inlet porton air charging in the diesel cylinder

2019 ◽  
Vol 135 ◽  
pp. 01083 ◽  
Author(s):  
Besarion Meskhi ◽  
Boris Golev ◽  
Victor Efros ◽  
Dmitriy Rudoy ◽  
Anastasiya Olshevskaya ◽  
...  
Keyword(s):  
Combustion Chamber ◽  
Cross Section ◽  
Individual Factors ◽  
Time Of Arrival ◽  
Intake Valve ◽  
Working Cycle ◽  
Dynamic Loadings ◽  
Diesel Cylinder ◽  
The Impact ◽  
Fresh Charge

The calculation of the actual working cycle processes allows to determine with satisfactory accuracy the value of the main parameters of the newly developed engine for any given conditions of its operation, to assess the impact of individual factors on the processes and the performance of the cycle as a whole. Thus establish character of change of pressure and temperature in each process, define the sizes of the engine, and also solve questions of increase of its reliability taking into account the received settlement thermal and dynamic loadings. Pre-intake begins at the time of opening the inlet and ends at the time of arrival of the piston in the TDC. The mixture or air does not enter the cylinder during preheating, as the volume of the cylinder decreases. However, the pre-opening of the intake valve allows you to create a sufficient cross-section to the beginning of the receipt of fresh charge in the cylinder and, therefore, leads to an improvement in the filling of the cylinders. In addition, due to the delay in closing the exhaust valve, the purge of the combustion chamber from residual gases is improved.

Numerical Simulation on Cylinder Flow Field of Diesel

2013 ◽  
Vol 712-715 ◽  
pp. 1330-1334
Author(s):  
Yin Dong Song ◽  
Yin Nan Yuan ◽  
Chun Ping Wu ◽  
Yong Wang Li ◽  
Peng Zhe Qi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Three Dimensional ◽  
Swirl Flow ◽  
Mixing Rate ◽  
Air Mixing ◽  
Reduce Emissions ◽  
Diesel Cylinder ◽  
Cylinder Flow ◽  
Transient Numerical Simulation

Three dimensional transient numerical simulation on cylinder flow field of 4B26 diesel was done by AVL FIRE. Detailed flow field structure of diesel cylinder was calculated. The typical swirl flow and squish flow were established in 4B26 diesel engine chamber. swirl flow and squish flow can increase the fuel and air mixing rate, and can improve diesel combustion and can reduce emissions of pollutants. Oil beam could accelerate the air around it.

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