Cause Of Engine Failure Research Articles

IMPLEMENTATION OF RELIABILITY CENTERED MAINTENANCE (RCM) II IN PACKAGING INDUSTRY PRODUCTION MACHINERY MAINTENANCE ACTIVITIES

Along with the increasing need for productivity and the use of high technology in the form of production machines and factories, the need for maintenance functions is also increasing. At PT. Weiss Tech, a packaging machine manufacturer, has problems mainly related to wire cut machine malfunctions which cause interruptions and delays in the production process and reduce machine performance. In overcoming these problems in this study, the Reliability Centered Maintenance (RCM) II method from Failure Modes and Effect Analyze (FMEA) was used. RCM II is one of the methods used to determine which components are due for repairs, while FMEA is defined as a method for identifying the root cause of engine failure. From the results of calculations using FMEA and RCM II, the results of the maintenance interval for the Electromotor component (electric motor) with a maintenance interval of 20 hours, for the Lower and upper nozzle components (upper and lower nozzles) with a maintenance interval of 181 hours, and for the Roller component (drive roller) ) with a treatment interval of 177 hours

Online monitoring of the technical condition of energy saturated agricultural equipment using neural networks

The article presents a technique for continuous monitoring of the technical condition of energy-saturated agricultural machinery (SHT) using digital technologies, aimed at introducing new intelligent methods for diagnosing machines in the agro-industrial complex. It is noted that the main task of the digital monitoring system is to analyze the effective operation of equipment. The proposed neural network can continuously receive data on the technical condition of agricultural machinery in real time, analyzes and structures input values, such as engine speed, hourly fuel consumption, coolant temperature, which depend on the load and operating modes of the machine engine. The advantage of the digital method of monitoring the parameters of the technical condition is its assessment in the process of diagnosing in real time. The method allows to determine not only the cause of engine failure, but also to evaluate the efficiency of complex energy-saturated agricultural machinery in general. The developed architecture of the neural network is capable of analyzing and transmitting data obtained during the diagnostic process to a special server for storing information. The proposed method for continuous monitoring of the technical condition of complex energy-saturated equipment according to controlled parameters, based on the use of neural networks, can be quickly adapted to different brands of equipment when diagnosing.

Continuous monitoring method when diagnosing the technical condition of tractors using digital systems

The proposed method is aimed at the development and implementation of new intelligent technologies that make it possible to increase the effectiveness of the diagnostic process and the reliability of the functional technical characteristics of the engine operation of automotive equipment in the agro-industrial complex. The article presents the results on substantiation and development of a digital system based on neural network interaction. The advantage of the method is the evaluation of tractor health under the condition of automation of diagnostic processes. The ability to determine not only the cause of engine failure, but also to assess the efficiency of the agricultural machine as a whole. Proposed neural network is able to perform analysis and transfer of obtained data during diagnostics to database of special program or server.

Analisis Troubleshooting pada Engine G3408 Generator Set Caterpillar

A research has been conducted about Troubleshooting that occurs in the Caterpillar Engine G3408 generator Set which aims to analyze the causes of the hydraulic lock and determine how to solve the problems that occur in the Caterpillar G3408 Engine Generator Set. The research method is to perform detection, diagnostic, and repair on the engine by doing a visual check, looking for the root of the problem and doing the test. The results are engine has a hydraulic lock caused by a damaged one of the components of the Air Intake and Exhaust System. The after cooler is also damaged due to its long service life, causing the coolant to enter the combustion chamber. From the overall analysis it is concluded that the cause of engine failure is one of the components is damaged due to a long service life and to overcome this is doing repair and replacement of components on the After cooler with new components and do the periodic maintenance on the Caterpillar G3408 Engine Generator Set.

ОСОБЕННОСТИ ПОСТРОЕНИЯ И ПРИМЕНЕНИЯ ЛОГИЧЕСКИХ МЕТОДОВ ПОИСКА ПРИЧИН ОТКАЗОВ ПОРШНЕВЫХ ДВИГАТЕЛЕЙ ВНУТРЕННЕГО СГОРАНИЯ В ЭКСПЛУАТАЦИИ

Despite the successes in research and development of designs of modern internal combustion engines for various purpose vehicles, including aircraft, to date, no reliable methods have been created to determine the causes of their failures. The application of well-known methods in practice, including the diagnosis of engine technical condition, not only requires a lot of labor and highly qualified personnel but in many cases, it is practically ineffective. This is especially true for severe operational damage arising from the destruction of the parts and accompanied by disturbing the synchronization of their reciprocating and rotational motion. On the other hand, the performed research shows that the causes of ICE failures can also be determined by logical-probabilistic methods, including based on the fault tree analysis, drawing on the available experience of studying various engine faults. However, it is not possible to use the well-known models and methods built based on the failure tree analysis in problems of finding the causes of engine failure. The reason is since such methods have been developed for the tasks of calculating the reliability characteristics of developed engines, rather than finding the causes of their failure in operation. The solution to this problem was found in several stages. Initially, by structuring the symptoms, a fault tree was compiled that logically describes the cause-effect relationships between the failure event and the initial damage that caused it. This is done separately for each of the types of failures selected for analysis and associated with severe damage to the studying engine type. Further, for a finite number of selected types of failures, a modified (inverted) fault tree was developed. It allows you to perform a simple logical analysis in the opposite direction to the generally accepted direction - from the system failure event to the basic events initiating the failure. After that, a modified engine fault tree common to the considered types of failures was compiled. As a result of using the proposed methodology in practice, it became possible to determine the causes of engine failure with sufficient reliability with minimal time.

ADAPTATION OF TECHNICAL MAINTENANCE OF THE MAIN TANKS ENGINE POWER SUPPLY SYSTEM IN CONDITIONS OF RESOURCES

As a result of the maintenance of armored artillery armament and equipment in the area of the antiterrorist operation, it was established that the maintenance tasks were solved being limited in forces and means. Personnel conducted the minimum amount of operations, technical maintenance 1 and 2 were not performed in full, level of personnel training is low. In addition, it is noted that the existing maintenance system requires significant improvement. Thus, the imperfect existing maintenance system, failure to meet a certain amount of maintenance work and poor knowledge of operation regulations for the armored armament material negatively affected, and in some cases, were the main cause of engine failure. Confirmation to this is the data taken from general analysis of the technical state of samples of armored vehicles and equipment during the practical task accomplishment in the area of antiterrorist operation. Therefore, the reasons for the failure of T-64BV (T-64BM) tanks in 34% of cases were malfunction of the air supply system. In order to prevent the causes of tank engine failure, increase their reliability, it is necessary to outline the prospects of the development of air cleaner stands and the direction of increasing the efficiency of technical maintenance of the air supply system of tank engines. For advanced air cleaner stands, it is advisable to use a modular structure, based on existing stands for use both in stationary and field conditions, using modern industrial materials. The modular structure of a perspective rinse air cleaner should have the following unified components, namely: an electric power supply, a heater, a pump and a bath with a lid. The main directions of increasing the efficiency of operation of engine power supply maintenance by air tanks include the concentration of the research organizations of the Armed Forces of Ukraine on the military-technical direction for conducting systematic research with the aim of improving technical maintenance of the air supply system of tank engines using modern air cleaner stands, scientific-technical support for the purpose of scientific substantiation of ways to improve the system of maintenance of engine air supply system.

Method of diagnostics of the rotor eccentricity of an induction motor

The main type of electric motors used in the electric drive of technological processes are induction motors with a squirrel-cage rotor. With proper operation, they have a higher MTBF (Mean Time Between Failures). It was found that one of the common causes of engine failure is bearing wear and, as a result, increased rotor eccentricity. We used the oscillating amplitude of the rotor speed in the transient state as a diagnostic parameter. The paper presents a method for this troubleshooting, a block scheme and appearance of the experimental installation, and a single-line diagram of the transmitter for measuring rpm. The experience has established the optimal ADC sampling frequency for experimentation to be carried out. The results of studies of changes in the rotor speed oscillating from time to time under load at rotor eccentricity have been given.

Means of increasing efficiency of main tank models' (Т-64 BV, Т-64 BM) engine air feed system maintenance

As a result of the maintenance of armored artillery armament and equipment in the area of the antiterrorist operation, it was established that the maintenance tasks were solved being limited in forces and means. Personnel conducted the minimum amount of operations, technical maintenance 1 and 2 (TO-1 and TO-2) were not performed in full, level of personnel training is low. In addition, it is noted that the existing maintenance system requires significant improvement. Thus, the imperfect existing maintenance system, failure to meet a certain amount of maintenance work and poor knowledge of operation regulations for the armored armament material negatively affected, and in some cases, were the main cause of engine failure. Confirmation to this is the data taken from general analysis of the technical state of samples of armored vehicles and equipment during the practical task accomplishment in the area of antiterrorist operation. Therefore, the reasons for the failure of T-64BV (T-64BM) tanks in 34% of cases were malfunction of the air supply system. In order to prevent the causes of tank engine failure, increase their reliability, it is necessary to outline the prospects of the development of air cleaner stands and the direction of increasing the efficiency of technical maintenance of the air supply system of tank engines. For advanced air cleaner stands, it is advisable to use a modular structure, based on existing stands for use both in stationary and field conditions, using modern industrial materials. The modular structure of a perspective rinse air cleaner should have the following unified components, namely: an electric power supply, a heater, a pump and a bath with a lid. The main directions of increasing the efficiency of operation of engine power supply maintenance by air tanks include the concentration of the research organizations of the Armed Forces of Ukraine on the military-technical direction for conducting systematic research with the aim of improving technical maintenance of the air supply system of tank engines using modern air cleaner stands, scientific-technical support for the purpose of scientific substantiation of ways to improve the system of maintenance of engine air supply system.

THE INFLUENCE OF FAULTS IN THE LUBRICATION SYSTEM ON THE DAMAGE OF THE ENGINE BEARINGS

The analysis of the condition of the internal combustion engine bearings is carried out for various lubrication system faults, which cause a reduction or even complete stoppage of the oil supply to the bearings of the crankshaft. It is established that the oil supply failure leads to two main types of bearing damage: when only the main bearings are damaged, it can be a complete or almost complete stop of the oil supply, while damage to the connecting rod bearings only occurs when the oil supply decreases. It was found that the difference in the nature of damage to the main and connecting rod bearings is associated not only with the structural difference in the organization of the oil supply, but also with the effect of centrifugal forces from crankshaft rotation to the oil column in the lubricating hole supplying oil to the conrod bearing. The main signs of the types of damage are presented and analyzed, and by dividing these characteristics into the main ones, confirming and specifying, simple recommendations have been developed to determine the causes of engine failure associated with bearing damage.

Study of the causes of engine failure in ship and maintenance required to prevent engine failure

Failure is the malfunction of engine components. There are tremendous factors which contribute to fail the engine. For example poor design, contaminated fuel, unskilled manpower, lack of proper maintenance, long running hours, poor quality of fuel, poor fuel management technique, lack of vigilance and modification of the part. The entire above mentioned are made to fail the engine. In order to avoid such things our project study provides an idea to the personnel in charge of the engine room how they could use and apply the proper maintenance. Because maintenance is minimizing the chances of failure. If that so the component should inspect or maintain at the correct time. Especially preventive type of maintenance must be applied than the others. Preventive maintenance is the easiest and least expensive type of maintenance. It keeps records of regularly scheduled maintenance. It also uses the correct fuel, lubricating oil and coolant in the engine as specified in maintenance specifications. It also gives idea how proper fuel management technique like doing bunkering in proper manner should be done to prevent engine failure and also to prevent pollution. The operation reliability of the diesel engine is mostly affected by wear and corrosion. To avoid abnormal operation of the diesel engine, we recommend that complete overhaul should be carried out according to maintenance manual or schedule. We hope it should be minimized from time to time when the operators get aware of the cause of it. Definitely through time every engine component deteriorate its efficiency after accomplishing several task but doing so our aim is to increase the service life of the engine and we believed that it would be minimized if the operator understood the consequence of the failure. Moreover, if failure is minimized, service life of the engine increase, life of the ship saved and damage of component as well as cost is saved.

A Survey of Analysis, Modeling, and Diagnostics of Diesel Fuel Injection Systems

Diesel engines are widely used due to their high reliability, high thermal efficiency, fuel availability, and low consumption. They are used to generate power, e.g., in passenger cars, ships, power plants, marine offshore platforms, and mining and construction machines. The engine is at heart of these applications, so keeping it in good working condition is vital. Recent technical and computational advances and environmental legislation have stimulated the development of more efficient and robust techniques for the diagnostics of diesel engines. The emphasis is on the diagnostics of faults under development and the causes of engine failure or reduced efficiency. Diesel engine fuel injection plays an important role in the development of the combustion in the engine cylinder. Arguably, the most influential component of the diesel engine is the fuel injection equipment; even minor faults can cause a major loss of efficiency of the combustion and an increase in engine emissions and noise. With increased sophistication (e.g., higher injection pressures) being required to meet continuously improving noise, exhaust smoke, and gaseous emission regulations, fuel injection equipment is becoming even more susceptible to failure. The injection systems have been shown to be the largest contributing factor in diesel engine failures. Extracting the health information of components in the fuel injection system is a very demanding task. Besides the very time-consuming nature of experimental investigations, direct measurements are also limited to selected observation points. Diesel engine faults normally do not occur in a short timeframe. The modeling of typical engine faults, particularly combustion related faults, in a controlled manner is thus vital for the development of diesel engine diagnostics and fault detection. Simulation models based on physical grounds can enlarge the number of studied variables and also obtain a better understanding of localized phenomena that affect the overall behavior of the system. This paper presents a survey of the analysis, modeling, and diagnostics of diesel fuel injection systems. Typical diesel fuel injection systems and their common faults are presented. The most relevant state of the art research articles on analysis and modeling of fluid injection systems as well as diagnostics techniques and measured signals describing the behavior of the system are reviewed and the results and findings are discussed. The increasing demand and effect of legislation related to diagnostics, especially on-board diagnostics (OBD), are discussed with reference to the future progress of this field.

A methodology to determine pre-crash fuel quantity from post-crash fire thermal damage to an aircraft structure

The cause of engine failure that resulted in a catastrophic crash of a twin turbo-jet commuter aircraft is sought. The US National Transportation Safety Board and aircraft manufacturer contend that the engines failed because the aircraft ran out of jet fuel. The aircraft operators are confident that there was adequate fuel and that some other process caused fuel starvation. There was a post-crash fire that caused substantial thermal destruction of aircraft structure. If the majority of fire damage could be attributed to the burning of jet fuel, then it would be likely that the fuel inventory, just prior to impact with the ground, was adequate for continued flight. Thus investigators would have to conclude that some other mechanism caused the fuel starvation. In this work, a methodology is presented to determine the amount of fuel necessary to cause the observed thermal damage on the aircraft structure. The methodology is based on the determination of the heat flux and burning rates from the associated jet fuel pool fire and a heat transfer analysis to obtain the time required to melt structural parts subjected to the resulting heat fluxes. For an Aluminum alloy member, 70 mm thick, the time to reach the melting temperature of the alloy (∼500° C) is almost 4 min. Fully developed jet fuel pool fires burn at a rate of ∼0.06 kg/m2s, thus, for a pool fire of 10 m2, the fuel burned would be ∼130 kg, which is equivalent to about 151.4 L (40 US liquid gallons) of fuel. This fuel quantity would have been more than sufficient for the aircraft to reach its destination. Moreover, the actual quantity of fuel burnt would have been substantially more because of the conservative assumptions made in the analysis.