Power Loss Investigation in an Internal Combustion Engine Piston Equipped With a Nonlinear Energy Absorber

Control Method ◽

Combustion Engine ◽

Cylinder Liner ◽

Nonlinear Energy Sink ◽

Internal Combustion ◽

Operating Conditions ◽

Power Losses ◽

Nonlinear Energy

The piston impacts against the cylinder liner are the most significant sources of mechanical noise in internal combustion engines. Conventionally, the severity of impacts is reduced through the modification of physical and geometrical characteristics of components in the piston assembly. These methods effectively reduce power losses at certain engine operating conditions. Moreover, the conditions leading to the reduction in power losses inversely increase the engine noise due to piston impacts. An alternative control method that is robust to fluctuations in engine operating conditions is anticipated to improve the engine’s NVH performance whilst exacerbation in power loss remains within the limits of the conventional methods. The concept of Targeted Energy Transfer (TET) through the use of Nonlinear Energy Sinks (NES) has not been applied yet in automotive powertrains. Numerical studies have shown a potential in reducing the severity of impact dynamics by controlling piston’s secondary motion. The power loss of a piston equipped with a nonlinear energy sink is investigated in this study.

Design Optimization Study of a Nonlinear Energy Absorber for Internal Combustion Engine Pistons

Journal of Computational and Nonlinear Dynamics ◽

10.1115/1.4040239 ◽

2018 ◽

Vol 13 (9) ◽

Cited By ~ 3

Author(s):

N. Dolatabadi ◽

S. Theodossiades ◽

S. J. Rothberg

Keyword(s):

Power Loss ◽

Combustion Engine ◽

Cylinder Liner ◽

Nonlinear Energy Sink ◽

Internal Combustion ◽

Operating Conditions ◽

Impact Noise ◽

Energy Sink ◽

Noise Vibration ◽

Nonlinear Energy

Piston impacts against the cylinder liner are the most significant sources of mechanical noise in internal combustion (IC) engines. Traditionally, the severity of impacts is reduced through the modification of physical and geometrical characteristics of components in the piston assembly. These methods effectively reduce power losses at certain engine operating conditions. Frictional losses and piston impact noise are inversely proportional. Hence, the reduction in power loss leads to louder piston impact noise. An alternative method that is robust to fluctuations in the engine operating conditions is anticipated to improve the engine's noise, vibration and harshness (NVH) performance, while exacerbation in power loss remains within the limits of conventional methods. The concept of targeted energy transfer (TET) through the use of nonlinear energy sink (NES) is relatively new and its application in automotive powertrains has not been demonstrated yet. In this paper, a TET device is conceptually designed and optimized through a series of parametric studies. The dynamic response and power loss of a piston model equipped with this nonlinear energy sink is investigated. Numerical studies have shown a potential in reducing the severity of impact dynamics by controlling the piston's secondary motion.

Effect of IC Engine Operating Conditions on Combustion and Emission Characteristics

Journal of Fluids Engineering ◽

10.1115/1.2910201 ◽

1993 ◽

Vol 115 (4) ◽

pp. 694-701 ◽

Cited By ~ 2

Author(s):

Jiang Lu ◽

Ashwani K. Gupta ◽

Eugene L. Keating

Keyword(s):

Combustion Chamber ◽

Combustion Engine ◽

Internal Combustion ◽

Operating Conditions ◽

Emission Characteristics ◽

Ic Engine ◽

Pollutants Emission ◽

Good Agreement

Numerical simulation of flow, combustion, heat release rate, and pollutants emission characteristics have been obtained using a single cylinder internal combustion engine operating with propane as the fuel. The data show that for good agreement with experimental results on the peak pressure and the rate of pressure rise as a function of crank angle, spark ignition energy and local cylinder pressure must be properly modeled. The results obtained for NO and CO showed features which are qualitatively in good agreement and are similar to those reported in the literature for the chosen combustion chamber geometry. The results have shown that both the combustion chamber geometry and engine operating parameters affects the flame growth within the combustion chamber which subsequently affects the pollutants emission levels. The code employed the time marching procedure and solves the governing partial differential equations of multicomponent chemically reacting fluid flow by finite difference method. The numerical results provide a cost effective means of developing advanced internal combustion engine chamber geometry design that provides high efficiency and low pollution levels. It is expected that increased computational tools will be used in the future for enhancing our understanding of the detailed combustion process in internal combustion engines and all other energy conversion systems. Such detailed information is critical for the development of advanced methods for energy conservation and environmental pollution control.

Behavior Prediction Model in Gas Fueled Spark Ignition Internal Combustion Engines Turbocharged for Genset Application

Volume 6A: Energy ◽

10.1115/imece2013-62161 ◽

2013 ◽

Author(s):

Jorge Duarte Forero ◽

German Amador Diaz ◽

Fabio Blanco Castillo ◽

Lesme Corredor Martinez ◽

Ricardo Vasquez Padilla

Keyword(s):

Equivalence Ratio ◽

Combustion Engine ◽

Internal Combustion ◽

Spark Ignition ◽

Operating Conditions ◽

Inlet Temperature ◽

Combustion Engines ◽

Gaseous Fuels ◽

Methane Number

In this paper, a mathematical model is performed in order to analyze the effect of the methane number (MN) on knock tendency when spark ignition internal combustion engine operate with gaseous fuels produced from different thermochemical processes. The model was validated with experimental data reported in literature and the results were satisfactory. A general correlation for estimating the autoignition time of gaseous fuels in function of cylinder temperature, and pressure, equivalence ratio and methane number of the fuel was carried out. Livengood and Wu correlation is used to predict autoignition in function of the crank angle. This criterium is a way to predict the autoignition tendency of a fuel/air mixture under engine conditions and consider the ignition delay. A chemical equilibrium model which considers 98 chemical species was used in this research in order to simulate the combustion of the gaseous fuels at differents engine operating conditions. The effect of spark advance, equivalence ratio, methane number (MN), charge (inlet pressure) and inlet temperature (manifold temperature) on engine knocking is evaluated. This work, explore the feasibility of using syngas with low methane number as fuel for commercial internal combustion engines.

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

Piston ring–liner lubrication and tribological performance evaluation: A review

10.1177/1350650117706269 ◽

2017 ◽

Vol 232 (2) ◽

pp. 193-209 ◽

Cited By ~ 14

Author(s):

Cristiana Delprete ◽

Abbas Razavykia

Keyword(s):

Piston Ring ◽

Combustion Engine ◽

Internal Combustion ◽

Combustion Engines ◽

Power Losses ◽

Oil Consumption ◽

Major Power ◽

Power Sources ◽

Engine Efficiency

Internal combustion engines are at present used as the major power sources for transportation and power generator. Improvement of the internal combustion engine efficiency is expected due to strict environmental standards and energy costs. Any reduction in oil consumption, friction power losses and emissions results in improving engines’ performance and durability. Automotive industries have intense passion to increase engines’ efficiency to meet the fuel economy and emission standards. Many studies have been conducted to develop reliable approaches and models to understand the lubrication mechanisms and calculate power losses. This review paper summarizes the synthesis of the main technical aspects considered during modeling of piston ring–liner lubrication and friction losses investigations. The literature review highlights the effects of piston ring dynamics, components geometry, lubricant rheology, surface topography and adopted approaches, on frictional losses contributed by the piston ring-pack.

MATHEMATICAL MODEL OF AUTOMATION OF THE DIAGNOSIS OF INTERNAL COMBUSTION ENGINES OF THE YAMZ-238 FAMILY

ENGINEERING, ENERGY, TRANSPORT AIC ◽

10.37128/2520-6168-2021-4-2 ◽

2021 ◽

pp. 12-23

Author(s):

Dmytro Borysiuk ◽

Viacheslav Zelinskyi ◽

Igor Tverdokhlib ◽

Yurii Polievoda

Keyword(s):

Mathematical Model ◽

Combustion Engine ◽

Structural Parameters ◽

Internal Combustion ◽

Operating Conditions ◽

Inverse Transformation ◽

Combustion Engines ◽

Functional Relationships

Constructive improvement of mobile energy means, in particular their main unit - the internal combustion engine, is directed on: maintenance of differentiation of size of parameters of functioning of mechanisms of systems depending on variability of conditions and modes of operation of cars; increase of technical resource at use of cars on purpose in the set operating conditions. The existing methods and tools for diagnosing vehicle engines do not fully determine their current technical condition, which requires the development of mathematical models to automate the process of diagnosing their components and parts was found іn the analysis of literature sources. The object of diagnosis is a diesel internal combustion engine of the YaMZ-238 family, which is part of the power unit of most vehicles. Mathematical model of automation of the process of diagnosing internal combustion engines of the YaMZ-238 family is presents in the article. Replacing real technical devices with their idealized models allows the widespread use of various mathematical methods. In this case, the internal combustion engine of the YaMZ-238 family, as the object of diagnosis, is presented in the form of a «black box», the input and output parameters of which have a finite set of values. In general, the mathematical model is a system of functional relationships between each diagnostic signal and structural parameters. For internal combustion engines of the YaMZ-238 family, a diagnostic matrix has been compiled, which includes a list of faults and signs of faults. It is determined that the process of diagnosis based on the model of the diagnostic object is possible if the inverse transformation of the number of signs of malfunctions into the number of structural parameters (malfunctions) of the object was unambiguous. The proposed mathematical model of automation of the process of diagnosing internal combustion engines of the family YaMZ-238 will detect faults of components and parts depending on their characteristics.

Devising a model of the airflow with dust particles in the intake system of a vehicle’s internal combustion engine

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2021.230113 ◽

2021 ◽

Vol 2 (1 (110)) ◽

pp. 61-69

Author(s):

Olexii Saraiev ◽

Alexander Khrulev

Keyword(s):

Combustion Engine ◽

Internal Combustion ◽

Operating Conditions ◽

Dust Particles ◽

Two Phase ◽

Air Filter ◽

Intake System ◽

Characteristic Particle ◽

Pass Through

This paper considers the mechanism of malfunction of internal combustion engines that implies the accelerated local wear of parts in individual cylinders as a result of uneven distribution of dust particles that pass through the air filter in the intake system. In order to acquire quantitative data on the effect of the structure of the intake system on the redistribution of dust in engine cylinders, the two-phase flow of air with dust particles in the standard elements of the intake system was mathematically modeled. ANSYS software package was used to solve the problem. A simulation technique was devised in which the airflow was first calculated to determine the boundary conditions for dust, after which the flow of air with particles was calculated. The calculations were carried out in a range of air velocities of 5‒20 m/s in branching channels with diversion angles of 45°, 90°, and 135° for the most characteristic particle sizes of 5‒30 µm. It has been estimated that dust particles deviate from the air streamlines by inertia and can slip through the lateral drain the stronger the larger particle size, diversion angle, and velocity of air. The comparison of the simulation results with experimental data confirmed that in the intake system of some engines, due to uneven particle distribution, there is local abrasive wear in one or more cylinders, which can significantly reduce the resource. This paper shows the need to take into consideration the centrifugation and redistribution of dust in the intake systems during the design, modernization, expert studies to determine the causes of faults associated with faulty operating conditions, as well as to clarify the regulations for the maintenance of existing engines.

Effects of a Cylinder Liner Microstructure on Lubrication Condition of a Twin-Land Oil Control Ring and a Piston Skirt of an Internal Combustion Engine

10.21203/rs.3.rs-905301/v1 ◽

2021 ◽

Author(s):

Koji Kikuhara ◽

Philipp S Koeser ◽

Tian Tian

Keyword(s):

Combustion Engine ◽

Cylinder Liner ◽

Internal Combustion ◽

Operating Conditions ◽

Friction Reduction ◽

Surface Structures ◽

Sliding Surface ◽

Piston Skirt ◽

Lubrication Condition

Abstract It is hypothesized that the sliding surface structures improve the lubrication condition by forming an oil sump on the sliding surface, redistributing the oil, and trapping wear debris. For these reasons, the sliding surface structures have been used as a friction reduction method for a long time. However, how to optimize the sliding surface structure is still controversial. In this work, effects of microstructure laid on the cylinder liner of an internal combustion engine on twin-land oil control ring (TLOCR) and piston skirt lubrication condition were investigated by comparing friction between the conventional fine-honed liner (CFL) and the microstructured liner (MSL) which was made based on the CFL. As a result of the friction measurement using a floating liner engine, it was found that the microstructure improved lubrication condition by reducing hydrodynamic friction. On the other hand, the result showed there was a possibility that the microstructure deteriorated friction depending on the engine operating conditions.

Exhaust Pressure Estimation and Its Application to Detection and Isolation of Turbocharger System Faults for Internal Combustion Engines

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4005045 ◽

2011 ◽

Vol 134 (2) ◽

Cited By ~ 13

Author(s):

Yue-Yun Wang ◽

Ibrahim Haskara

Keyword(s):

High Speed ◽

Failure Modes ◽

Combustion Engine ◽

Pressure Sensors ◽

Internal Combustion ◽

Operating Conditions ◽

Combustion Engines ◽

Recirculation Flow ◽

Model Based

Engine exhaust backpressure is a critical parameter in the calculation of the volumetric efficiency and exhaust gas recirculation flow of an internal combustion engine. The backpressure also needs to be controlled to a presetting limit under high speed and load engine operating conditions to avoid damaging a turbocharger. In this paper, a method is developed to estimate exhaust pressure for internal combustion engines equipped with variable geometry turbochargers. The method uses a model-based approach that applies a coordinate transformation to generate a turbine map for the estimation of exhaust pressure. This estimation can substitute for an expensive pressure sensor, thus saving significant cost for production vehicles. On the other hand, for internal combustion engines that have already installed exhaust pressure sensors, this estimation can be used to generate residual signals for model-based diagnostics. Cumulative sum algorithms are applied to residuals based on multiple sensor fusion, and with the help of signal processing, the algorithms are able to detect and isolate critical failure modes of a turbocharger system.

Less wear on the piston skirts of internal combustion engines

RUDN Journal of Engineering Researches ◽

10.22363/2312-8143-2020-21-3-175-180 ◽

2020 ◽

Vol 21 (3) ◽

pp. 175-180

Author(s):

Arthur R. Asoyan ◽

Alexander S. Gorshkov ◽

Ani H. Israelyan

Keyword(s):

Combustion Engine ◽

Internal Combustion ◽

Operating Conditions ◽

Surface Plastic ◽

Combustion Engines ◽

Piston Cylinder ◽

Operational Life ◽

Piston Skirts

A significant proportion of mechanical losses in internal combustion engines accounted for mechanical losses in the cylinder-piston group. Depending on the operating modes of the internal combustion engine, contact interaction in the piston-cylinder pair is possible, which leads to wear of the working surfaces of the resource-determining elements and a decrease in the operational life of the power unit as a whole, in connection with which the reduction of friction losses in the internal combustion engine elements and the piston - cylinder liner coupling in particular is relevant. Both domestic and foreign researchers are engaged in the solution of the above described problems, various profiles of pistons, methods of calculating the parameters of the oil layer are proposed, but the practical state of the issue determines the relevance of research in this direction. The paper considers the possibility of reducing the wear of piston skirts by reducing the contact surface in conjugation and providing an oil film in the friction zone, regardless of engine operating conditions. This opportunity is realized by forming a certain macro profile on the working surface of the piston skirt. The formation of the macrorelief was carried out by means of surface plastic deformation, with the reciprocating movement of a spherical tool on the machined surface.

Bulletin of the South Ural State University series Mechanical Engineering Industry ◽

ASSESSMENT OF THE INFLUENCE OF MICROTEXTURING PARAMETERS ON THE HYDROMECHANICAL CHARACTERISTICS OF DIESEL CRANKSHAFT BEARINGS

10.14529/engin200104 ◽

2020 ◽

Vol 20 (1) ◽

pp. 30-37

Author(s):

Yu. V. Rozhdestvensky ◽

◽

K. V. Gavrilov ◽

M. A. Izzatulloev ◽

◽

...

Keyword(s):

Diesel Engine ◽

Combustion Engine ◽

Cylinder Liner ◽

Internal Combustion ◽

Calculation Model ◽

Operating Conditions ◽

Energy Losses ◽

Connecting Rod ◽

Friction Regime

The solution to the problem of increasing the motor resource of an internal combustion engine (ICE) is directly related to the reduction of energy losses due to overcoming friction in the elements of systems, mechanisms, and complexly loaded tribo-couplers (TC). Among the mechanical friction losses, a special place isoccupied by the hydromechanical friction losses in the internal combustion engine. The reduction of energy losses to overcome friction is achieved by reducing mechanical losses by limiting the level of loading of the rubbing surfaces, by increasing the proportion of the liquid friction regime for the most critical in terms of reliability resource-determining complex loaded vehicles. For complexly loaded vehicles, the time and magnitude of the acting loads are characteristic, at which the position of the movable element in conjunction is characterized by high eccentricities. Such complexly loaded vehicles include the main and connecting rod bearings of the crankshaft, the “piston guide – cylinder liner” and “piston ring – cylinder liner” couplings, the thrust and thrust bearings of the ICE turbocharger, etc. One of the ways to reduce oil starvation isto texturize the contacting surfaces, which will increase the bearing capacity of a complex bearing due to the creation of many “micro wedges”. In particular, the texturing of the surface of the bearing shells of the crankshaft can be performed in the form of elliptical micro-holes, which allow you to save oil on the friction surface under any operating conditions of the diesel engine. The article provides an overview of the main types of microtexturing of friction surfaces of TC. A calculation model has been created and a calculation analysis program has been developed for the internal combustion engine “crankshaft neck-liner” TC. The calculations ofthe hydromechanical characteristics (HMC) of the vehicle for various types of microtexture were performed using the connecting rod bearing of the diesel engine CHN 13/15 as an example.