ENGINE OIL VISCOSITY FLUCTUATIONS AS AN INDICATOR OF TECHNICAL CONDITION OF INTERNAL COMBUSTION ENGINE AND LUBRICANT PROPERTIES

2019 ◽  
Vol 3 (62) ◽  
pp. 54-62
Author(s):  
Valery V. Ostrikov ◽  
◽  
Sergey N. Sazonov ◽  
Dmitriy N. Afonichev ◽  
Vyacheslav G. Kozlov ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technical Condition ◽  
Engine Oil ◽  
Oil Viscosity

scholarly journals The optimization of internal combustion engine oil change periods

2019 ◽  
Vol 26 (01) ◽  
pp. 157-162
Author(s):  
Davaasuren G ◽  
Gantulga G
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Operating Regime ◽  
Spare Parts ◽  
Operating Conditions ◽  
Engine Oil ◽  
Used Oil ◽  
Negative Effect

It is vitally important for vehicle users that are to study the operating regime that may negative effect to the operation of the engine, to reduce its effect, to maintain the engine's reliability in accordance with the specific operating conditions. Quality of lubrication is one of the main factors that are improving of reliability and operational efficiency for any machinery their spare parts. So this paper presents to optimize of oil change intervals and to determine of wear rating of spare parts by content of metal particles in the internal combustion engine used oil. Дотоод шаталтат хөдөлгүүрийн тос солих хугацааг оновчлох нь Хураангуй:  Машин ашиглагчдын хувьд тухайн хөдөлгүүрийн ажиллагаанд сөрөг нөлөө үзүүлэх  ашиглалтын горимыг судалж, түүний хор нөлөөг багасгах болон ашиглалтын өвөрмөц  нөхцөлд тохируулан хөдөлгүүрийн найдварт ажиллагааг ханган зөв, ашигтай ажиллуулах  чадвартай байх нь асар их ач холбогдолтой юм. Аливаа машин техник , тэдгээрийн агрегат,  зангилаа эд ангийн удаан эдлэхүй, найдвартай ажиллагааг хангах, ашиглалтын үр ашгийг  дээшлүүлэх гол хүчин зүйлүүдийн нэг нь тосолгооны чанар байдаг учраас дотоод шаталтат  хөдөлгүүрийн ашигласан тосон дахь металлын агууламжыг илрүүлж, эд ангийн элэгдлийн  явцыг тодорхойлон, тос солих хугацааг оновчлох асуудлыг судалгааны хүрээнд авч үзлээ.  Түлхүүр үг: Хөдөлгүүрийн ашигласан тосны шинжилгээ, металл хольц, тосны бохирдол,  тортог, элэгдлийн элементийн хязгаар 

FEATURES OF MEASURING THE CAMSHAFT OF INTERNAL COMBUSTION ENGINES

2021 ◽  
Vol 4 (30) ◽  
pp. 99-105
Author(s):  
A. V. Summanen ◽  
◽  
S. V. Ugolkov ◽  
Keyword(s):  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technical Condition ◽  
Combustion Engines

This article discusses the issues of assessing the technical condition of the camshaft, internal combustion engine. The necessary parameters for assessing the technical condition of the engine camshaft have been determined. How and how to measure and calculate this or that parameter is presented in detail. Methods for calculating the parameters are presented. A scheme and method for measuring neck wear, determining the height of the cam, determining the beating of the central journal of the camshaft are proposed. The main defects of the camshafts are presented. The issues of the influence of these parameters on the operability of the camshaft and the internal combustion engine as a whole are considered.

Accuracy of identification of the state of the internal combustion engine with the customized model using the measuring expert system

2021 ◽  
pp. 54-67
Author(s):  
Иван Петрович Добролюбов ◽  
Олег Федорович Савченко ◽  
Виктор Валентинович Альт ◽  
Олег Владимирович Ёлкин ◽  
Денис Николаевич Клименко
Keyword(s):  
Expert System ◽  
Internal Combustion Engine ◽  
Computer Model ◽  
Gradient Method ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Technical Condition ◽  
The State ◽  
Actual State ◽  
Operational Conditions

Рассмотрены вопросы уменьшения погрешности идентификации технического состояния двигателя внутреннего сгорания и его составных частей как объекта экспертизы путем настраивания параметров применяемой в измерительной экспертной системе виртуальной модели ДВС. Для настройки модели предложено применение градиентного метода, обеспечивающего наиболее быструю минимизацию погрешности идентификации Purpose and methods. Improving the accuracy of identification for the technical condition of the internal combustion engine (ICE) in operational conditions using the engine measurement expert system (EMSE) is addressed by adjusting the computer dynamic model of the internal combustion engine. Results. Algorithmic schemes of computer models for the state of the ICE are obtained using the equations of its dynamics, which takes into account the factors such as the movement of the fuel supply body, the force on the hook - the load. The structural schemes of modeling at the input of a step-by-step action are presented. A promising method of tuning the model in the EMSE is proposed, which consists of measuring its working processes, in particular the angular acceleration of the crankshaft, for a specific brand of ICE. Then the corresponding set of models of its technical condition is obtained: normal, permissible, limit, pre-accident and emergency. By adjusting the values of the coefficients of these models in the EMSE, they achieve their coincidence with the actual state of the ICE. The identification error is minimized using the gradient method of steepest descent. The presence of several computer models is a practical advantage in the examination of the technical condition of the tested engines allowing its effective implementation in operational conditions. In this case, based on the experience of operation, the computer model closest to the actual state of the ICE is adjusted. At the same time, the efficiency of localization of ICE malfunctions increases, since the coefficients reflecting the state of the engine components and systems are consistently adjusted. Conclusions. The application of the proposed methodology using the criterion of minimizing the identification error by the gradient method allows implementation of this effective method for identifying the state of the ICE. It increases the reliability of determining the technical state of the ICE and its components by adjusting the computer model

Analysis on Application of HCCI Technology for Hybrid Electric Vehicles

2011 ◽  
Vol 128-129 ◽  
pp. 803-806 ◽  
Author(s):  
Jing Wu ◽  
Hong Yuan Zhang
Keyword(s):  
Internal Combustion Engine ◽  
Electric Vehicles ◽  
Hybrid Electric Vehicles ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Oil ◽  
Effective Solution ◽  
Batch Production ◽  
Technical Problems ◽  
Hybrid Electric

The article introduces HCCI technical characteristics, existing technical problems and characteristics of the hybrid electric vehicles, analyzes application feasibility and advantages of HCCI technology for hybrid electric vehicles and proposes that HCCI technology is an effective solution for the hybrid electric vehicles in increasing economy of internal-combustion engine oil and reducing emissions and further can realize batch production of products.

Coupled Model of Partially Flooded Lubrication and Oil Vaporization in an Internal Combustion Engine

2005 ◽  
Author(s):  
Boon-Keat Chui ◽  
Harold J. Schock ◽  
Andrew M. Fedewa ◽  
Dan E. Richardson ◽  
Terry Shaw
Keyword(s):  
Internal Combustion Engine ◽  
Piston Ring ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Injection Timing ◽  
Oil Viscosity ◽  
Engine Operation ◽  
Extreme Stress ◽  
Compression Ring

The cylinder-kit assembly of an internal combustion engine experiences severe conditions during engine operation. The top compression ring, in particular, undergoes extreme stress directly from cylinder gas pressure, inertial and thermal loads. The top compression ring is often the most significantly affected piston ring, and one of the common resultant phenomena is high wear on the ring/bore surfaces. In many previous studies, the modeling of tribological phenomena at the top compression ring/bore region involves hydrodynamic and boundary lubrication, friction and wear. This present work accounts for an additional factor that may affect the piston ring/bore lubrication — the lubricant evaporative effect. A three-dimensional oil evaporative analysis is coupled into the calculation of mixed lubrication in a cyclic engine computation. The presence of the evaporation analysis allows the study of the temperature influence on the piston ring/bore lubrication in addition to its effect on oil viscosity. A prospective application of this model is in diesel engine analysis. Considering the broad operating range of modern diesel fuel injection systems, the injection timing can be made throughout the compression/expansion process. It is well demonstrated that certain areas of fuel injection operation can result in potential adverse consequences such as increased bore wear. A well known example is “bore wall fuel wetting.” Given concerns around the potential for wear-inducing interactions between the fuel injection plumes and the bore wall, we have explored a particular interaction: bore wear in response to an imposed local heating of the bore wall. The simulation result provides valuable insights on this interaction, in which higher bore wear is predicted around bore wall area with locally imposed wall heating.

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