A Study on Cylinder Bore Deformation of a Diesel Engine With Dry Liner Structure

2001 ◽  
Author(s):  
Shigeto Yamamoto ◽  
Hiroshi Sakita ◽  
Masaaki Takiguchi ◽  
Shinichi Sasaki
Keyword(s):  
Thermal Expansion ◽  
Diesel Engine ◽  
Room Temperature ◽  
Engine Speed ◽  
Cylinder Liner ◽  
Cylinder Block ◽  
Cylinder Pressure ◽  
Engine Operation ◽  
Actual Operation ◽  
Cylinder Bore

Abstract The deformation of the cylinder liner of a diesel engine in actual operation have been measured by the means of a rotary piston, and the deformation has been compared with those measured statically at room temperature. As a result, it is found that the deformation of the liner in engine operation is hardly affected by the deformation at room temperature, but it follows the deformation of the cylinder block where the liner is inserted. It is also found as follows: The deformation of the liner upper portion varies according to the head bolts and the engine load, while the effect of the cylinder pressure is insignificant. The deformation at the middle of the liner changes mainly by the thermal expansion in the thrust direction, while the deformation at the lower portion is not affected by the engine speed or the load.

One-Dimensional Simulation of the Combustion Process in an Engine Cylinder with Ethanol

2014 ◽  
Vol 660 ◽  
pp. 447-451
Author(s):  
Akasyah M. Kathri ◽  
Rizalman Mamat ◽  
Amir Aziz ◽  
Azri Alias ◽  
Nik Rosli Abdullah
Keyword(s):  
Diesel Engine ◽  
Alternative Fuels ◽  
Engine Speed ◽  
Combustion Process ◽  
Cylinder Pressure ◽  
Ethanol Fuel ◽  
One Dimensional ◽  
Engine Cylinder ◽  
Dimensional Simulation ◽  
The One

The diesel engine is one of the most important engines for road vehicles. The engine nowadays operates with different kinds of alternative fuels, such as natural gas and biofuel. The aim of this article is to study the combustion process that occurs in an engine cylinder of a diesel engine when using biofuel. The one-dimensional numerical analysis using GT-Power software is used to simulate the commercial four-cylinder diesel engine. The engine operated at high engine load and speed. The ethanol fuel used in the simulation is derived from the conventional ethanol fuel properties. The analysis of simulations includes the cylinder pressure, combustion temperature and rate of heat release. The simulation results show that in-cylinder pressure and temperature for ethanol is higher than for diesel at any engine speed. However, the mass fraction of ethanol burned is similar to that of diesel. MFB only affects the engine speed.

Heat Losses from a Divided-Chamber Diesel Engine

1983 ◽  
Vol 197 (3) ◽  
pp. 151-158 ◽  
Author(s):  
A C Alkidas ◽  
R M Cole
Keyword(s):  
Diesel Engine ◽  
Heat Loss ◽  
Engine Speed ◽  
Cylinder Liner ◽  
Coolant Temperature ◽  
Injection Timing ◽  
Intake Port ◽  
Exhaust Port ◽  
Heat Rejection ◽  
The Individual

The various components of heat loss were investigated in a single-cylinder divided-chamber diesel engine. The effects of engine speed, air/fuel ratio, injection timing, intake air temperature and coolant temperature on the heat rejection to the coolant were examined. The magnitudes of heat rejections to the coolant and to the individual cooling zones (cylinder liner, intake port, exhaust port and antechamber) were found to be related primarily to the rate of fuel consumption. The contributions of piston friction and exhaust port heat transfer to heat rejection to the coolant and the magnitude of heat loss from the exterior surfaces of the engine to the surroundings were also evaluated.

An Experimental Study on Fuel Economy Improvement of a Marine Diesel Engine Using a Sequential Turbocharging System

2018 ◽  
Author(s):  
Hechun Wang ◽  
Xiannan Li ◽  
Yinyan Wang ◽  
Hailin Li
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Diesel Engines ◽  
Engine Speed ◽  
Single Stage ◽  
Marine Diesel Engine ◽  
Nox Emissions ◽  
Engine Operation ◽  
Marine Diesel ◽  
High Torque

Marine diesel engines usually operate on a highly boosted intake pressure. The reciprocating feature of diesel engines and the continuous flow operation characteristics of the turbocharger (TC) make the matching between the turbocharger and diesel engine very challenging. Sequential turbocharging (STC) technology is recognized as an effective approach in improving the fuel economy and exhaust emissions especially at low speed and high torque when a single stage turbocharger is not able to boost the intake air to the pressure needed. The application of STC technology also extends engine operation toward a wider range than that using a single-stage turbocharger. This research experimentally investigated the potential of a STC system in improving the performance of a TBD234V12 model marine diesel engine originally designed to operate on a single-stage turbocharger. The STC system examined consisted of a small (S) turbocharger and a large (L) turbocharger which were installed in parallel. Such a system can operate on three boosting modes noted as 1TC-S, 1TC-L and 2TC. A rule-based control algorithm was developed to smoothly switch the STC operation mode using engine speed and load as references. The potential of the STC system in improving the performance of this engine was experimentally examined over a wide range of engine speed and load. When operated at the standard propeller propulsion cycle, the application of the STC system reduced the brake specific fuel consumption (BSFC) by 3.12% averagely. The average of the exhaust temperature before turbine was decreased by 50°C. The soot and oxides of nitrogen (NOx) emissions were reduced respectively. The examination of the engine performance over an entire engine speed and torque range demonstrated the super performance of the STC system in extending the engine operation toward the high torque at low speed (900 to 1200 RPM) while further improving the fuel economy as expected. The engine maximum torque at 900 rpm was increased from 1680Nm to 2361 Nm (40.5%). The average BSFC over entire working area was improved by 7.4%. The BSFC at low load and high torque was significantly decreased. The application of the STC system also decreased the average NOx emissions by 31.5% when examined on the propeller propulsion cycle.

Pengaruh Knalpot Particulate Trap Berbahan Dasar Kuningan Terhadap Tingkat Kebisingan Pada Mesin Diesel Stasioner

2017 ◽  
Vol 8 (2) ◽  
pp. 73-77
Author(s):  
Muhammad Fakhrurozi ◽  
Askan Askan
Keyword(s):  
Diesel Engine ◽  
Side Effects ◽  
Noise Level ◽  
Engine Speed ◽  
Exhaust Gas ◽  
Noise Levels ◽  
Correct Position ◽  
Engine Operation ◽  
Maintenance Schedule ◽  
Operation And Maintenance

The development of technology and industry has also affected the level of pollution. Side effects that are very influential on human health include the level of noise that comes out of the exhaust gas (exhaust). Sound pollution comes from either gasoline-fueled or diesel-fueled engine vehicles, especially in diesel engines. To reduce noise levels there are several ways that can be done; (1) Giving a silencer to the engine, (2) Designing a muffler on the exhaust gas line, (3) Placing the sound source in the correct position, and (4) Setting the engine operation and maintenance schedule. One way to reduce the noise level in a diesel engine is to trap a particulate trap installed in the exhaust gas (exhaust). This method can reduce the gas particles from combustion to the disposal process, so that the noise level can be reduced. The purpose of this study was to determine how much influence the installation of particulate trap made of brass metal in the exhaust of a diesel engine to the level of noise caused. This study uses a factorial type random design by varying the weight of the active ingredient of metal particulate trap 200gr, 300gr, 400g at engine speed between 900-1700rpm. The results of this study indicate that the lowest noise level is obtained from a 300 gr particulate trap ranging from 79.3 dB - 79.4 dB.

A Nonlinear, Transient, Single-Cylinder Diesel Engine Simulation for Predictions of Instantaneous Engine Speed and Torque

2000 ◽  
Vol 123 (4) ◽  
pp. 951-959 ◽  
Author(s):  
Z. S. Filipi ◽  
D. N. Assanis
Keyword(s):  
Diesel Engine ◽  
Angular Velocity ◽  
Engine Speed ◽  
Shaft Speed ◽  
Engine Operation ◽  
Transient Model ◽  
Velocity Fluctuations ◽  
Single Cylinder ◽  
Engine Simulation ◽  
Non Linear

A non-linear, transient, single-cylinder diesel engine simulation has been developed for predictions of instantaneous engine speed and torque. The foundation of our model is a physically based, thermodynamic, steady-state diesel engine simulation (Assanis, D. N., and Heywood, J. B., 1986, “Development and Use of a Computer Simulation of the Turbocompounded Diesel System for Engine Performance and Component Heat Transfer Studies,” SAE Paper 860329), which has been comprehensively validated for various engine designs. The transient extension of the parent model represents the diesel engine as a non-linear, dynamic system. The instantaneous crank-shaft speed is determined from the solution of the engine-external load dynamics equation, where the engine torque is tracked on a crank-angle basis. Validation of the transient model during rapid engine acceleration shows that both the cyclic fluctuations in the instantaneous crank-shaft speed line and the overall engine response are in good agreement with experimental measurements. Predictions of single-cylinder engine starting reveals the importance of selecting the proper value of the engine moment of inertia in order to control the amplitude of angular velocity fluctuations and ensure stable engine operation. It is further shown that the variation in the inertial forces on the reciprocating components with speed has a dramatic impact on the instantaneous torque profile, and consequently on angular velocity fluctuations.

The Effect of Cylinder Bore Distortion on Lube Oil Consumption and Blow-By

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Fatih Kagnici ◽  
Ozgen Akalin
Keyword(s):  
Finite Element ◽  
Piston Ring ◽  
Fourier Coefficients ◽  
Cylinder Block ◽  
Lubricating Oil ◽  
Oil Consumption ◽  
Engine Operation ◽  
Consumption Model ◽  
Cylinder Bore ◽  
Cylinder Bore Distortion

It is well known that cylinder bore deformations during engine operation cause a number of problems in piston ring lubrication. Particularly, the deterioration of piston ring and cylinder bore conformability results in a significant increase in lubricating oil consumption. Therefore, measurement and identification of cylinder bore distortion has been an important subject for engine designers. In this study, an analytical lubricating oil consumption model was developed for a diesel engine. Piston stiffness was identified as an important input parameter for the oil consumption model, and the stiffness matrix of the piston was calculated using finite element simulations. In addition, finite element analysis was performed to determine the distorted cylinder block shape in engine running conditions. Pressure curves and loads obtained in actual engine tests were used in the analysis. The Fourier coefficients of a distorted cylinder bore was calculated which characterize the deformed bore orders. Using these Fourier coefficients, several distorted bore shapes were regenerated, including a straight bore and the effect of each order on total lube oil consumption was investigated by means of the oil consumption model.

scholarly journals Cyclic Pressure Variations in A Small Diesel Engine Fueled with Biodiesel and Antioxidant Blends

2020 ◽  
Vol 17 (2) ◽  
pp. 7851-7857
Author(s):  
M.H. Ali ◽  
A. Abdullah ◽  
M.H. Mat Yasin ◽  
M.K. Kamarulzaman
Keyword(s):  
Diesel Engine ◽  
Engine Speed ◽  
Load Condition ◽  
Combustion Characteristics ◽  
Dual Fuel ◽  
Biodiesel Fuel ◽  
Cylinder Pressure ◽  
Indicated Mean Effective Pressure ◽  
Engine Combustion ◽  
Cyclic Variations

Biodiesel fuel is considered as one of the most competence sustainable replacement for fossil fuel due to their superior combustion characteristics and possesses higher oxygen content. Thus, many researchers recently investigated to improve biodiesel capability by adding additives whether by blending with dual-fuel or tri-fuel. However, the combustion characteristics for biodiesel and biodiesel-additives blends are not thoroughly examined and need additional research works to study how the biodiesel behaviour and characterise. Thus, this research main objective is to study a single-cylinder diesel engine cyclic cylinder pressure variations running with biodiesel with antioxidant (B2HA1.0 and B2HT 1.0) blends with palm oil methyl ester (POME). While The baseline fuels used for this study were biodiesel (B20) and pure diesel (B0). The entire test fuels were examined at a constant engine speed 1800 rpm with 100% engine load condition. The engine combustion characteristics were studied by utilising the indicated mean effective pressure (IMEP) and cyclic variations of combustion pressure at 200 consecutive cycles. Combustion characteristics of engine diesel have been studied by using statistical analysis. The results revealed that the engine running with biodiesel-antioxidants have higher cyclic variations of combustion from B20 and B0, which B2HA1.0 possessed the highest cyclic variations. It can be summarised from the study that biodiesel-antioxidants fuels produce a substantial influence on the engine cyclical variation, which linked to the characteristics of the engine combustion.

The Effects of Power Cylinder Design Parameters on Lube Oil Consumption of a Heavy Duty Diesel Engine

2008 ◽  
Author(s):  
Ozgen Akalin ◽  
Selcuk Cobanoglu ◽  
Ahu Toygar ◽  
Ozcan Gul ◽  
Goktan Kurnaz ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Diesel Engine ◽  
Operating Conditions ◽  
Cylinder Block ◽  
Design Parameters ◽  
Heavy Duty ◽  
Oil Consumption ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Cylinder Bore

In order to achieve fast and accurate oil consumption measurements, a real-time sulfur tracing method was developed employing a quadrupole mass spectrometer to analyze the sulfur dioxide concentration in the exhaust stream. A sampling system was designed to measure the oil consumption of separate cylinder groups sequentially under identical running conditions. The developed method enables the comparison of oil consumption of separate cylinder groups without disturbing the engine’s operation. Using this experimental method, steady-state oil consumption of a turbo-charged heavy-duty diesel engine was measured under various engine operating conditions. The effect of cylinder bore surface texture parameters on total lube oil consumption of the test engine was investigated simultaneously using a cylinder block having dissimilar honing patterns on each cylinder group. The results showed that the lube oil consumption of the engine is significantly affected by the cylinder bore surface roughness. The cylinder sets with high surface roughness demonstrated significantly higher lube oil consumption when the cylinder sets with high and low surface roughness was compared simultaneously.

scholarly journals Strategi Mengatasi Penyebab Surging Mesin Diesel Penggerak Utama di MT. ONTARI

2021 ◽  
Vol 3 (2) ◽  
pp. 29
Author(s):  
Afdolludin Afta Tazani
Keyword(s):  
Diesel Engine ◽  
Cylinder Liner ◽  
Normal Pressure ◽  
Spare Parts ◽  
Exhaust Gas ◽  
Engine Operation ◽  
Air Chamber ◽  
Two Factors ◽  
Main Engine ◽  
Very High

Turbocharger is a component to increase the amount of air that enters the cylinder by using exhaust gas energy. Very high quality gas turbocharger.The research method used in this research is descriptive qualitative method. Data analysis techniques use the SWOT method to analyze the factors that cause surging of the Main Movers Diesel Engine and the efforts made to overcome the factors associated with strengthening, weakness, opportunities, and protection.Based on the results of research conducted by researchers, the cause of the rise in Diesel Engine The main driving force is caused by two factors, namely the escape of compression during combustion due to oversize cylinder liner and spare parts of the main engine supply on the ship is hampered. To overcome the factors that can be done using cylinder liner that has been oversized, reducing the rotation of the main engine so that the exhaust gas is more stable, reducing the consumption of cylinder oil to reduce sludge in the rinse air chamber, using a blower to be manual to increase the rinse air to normal pressure during the engine operation, reconditioning the spare parts Parent engines such as crown pistons and piston rings by repairing so that they can be used again temporarily waiting for parts to arrive on board, and making spare parts purchases with boat money on spare parts that are lightweight and inexpensive for maintenance and repair of main engine spare parts.

Analysis of Diesel Engine Performance Fueled with Waste Cooking Oil

2013 ◽  
Vol 465-466 ◽  
pp. 418-422
Author(s):  
Nur Atiqah Ramlan ◽  
Mohd Herzwan Hamzah ◽  
Nur Fauziah Jaharudin ◽  
Abdul Adam Abdullah ◽  
Rizalman Mamat
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Engine Speed ◽  
Engine Performance ◽  
Waste Cooking Oil ◽  
Constant Load ◽  
Biodiesel Production ◽  
Cylinder Pressure ◽  
Cooking Oil ◽  
Engine Power

Waste cooking oil (WCO) is one of the economical and easiest sources for biodiesel production. The use of WCO in diesel engine is sustainable if they can perform similarly to diesel fuel. Therefore, this paper presents the performance and combustion characteristics of a single cylinder diesel engine fueled with biodiesel from WCO and compared with diesel fuel. In this study, the WCO was blended with diesel fuel at 5% and 10% blending ratio and named as B5 and B10 respectively. The experiment has been conducted at variable engine speed, constant load and at compression ratios of 17.7. The performance parameters that have been analyzed in this experiment were engine power, torque and in-cylinder pressure. In the end, results show that the engine performance of B5 and B10 was slightly similar to diesel fuel and can be used as a diesels substitute.

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