scholarly journals Psychoacoustic evaluation of internal combustion engine noises

2021 ◽  
Author(s):  
Sebastian Schneider ◽  
Tommy Luft ◽  
Hermann Rottengruber
Keyword(s):  
Internal Combustion Engine ◽  
Empirical Formula ◽  
Combustion Engine ◽  
Sound Quality ◽  
Hearing Tests ◽  
Engine Noise ◽  
Vehicle Development ◽  
Noise Evaluation ◽  
Engine Map

AbstractWhen buying a car, the acoustic impression of quality of a vehicle drive train is becoming more and more relevant. The perceived sound quality of the engine unit plays a key role here. Due to the nature of individual background noises, that sound quality is negatively influenced. These noise components, which are perceived as unpleasant, need to be further reduced in the course of vehicle development with the identification and evaluation of disruptive noise components in the overall engine noise being a prerequisite for effective acoustics optimization. In particular, the pulsed ticker noise is classified as particularly annoying in Otto DI engines, which is why this article aims to analyze and evaluate the ticking noise components from the overall noise. For this purpose, an empirical formula was developed which can classify the ticking noise components in terms of their intensity. This is purely perception-based and consists of the impulsiveness, the loudness and the sharpness of the overall engine noise. As with other psychoacoustic evaluation scales, the rating was made from 1 (very ticking) to 10 (not ticking). The ticker noise evaluation formula was then verified on the basis of hearing tests with the help of a jury of experts. According to this, it can be predicted precisely in which engine map areas the ticker noise undermines the pleasantness of the overall engine noise.

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 

scholarly journals OPTIMIZATION OF WASTE MOTOR OIL IN SHIP DIESEL WITH HIGH BOOST BY WEAR CRITERION

2018 ◽  
pp. 78-86
Author(s):  
Maxim Igorevich Tarasov ◽  
Georgy Alexandrovich Gauk ◽  
Liudmila Anatolievna Semeniuk
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Optimal Level ◽  
Engine Oil ◽  
Resource Saving ◽  
Engine Wear ◽  
The Impact

The results of modeling the impact of oil burning on the condition of the ship forced trunk piston diesel engine when using lubricants with different operating properties. The dependence of wear rate on oil fume, the quality of used lubricants and marine diesel forcing is obtained by modeling wear using the theory of planning experiments. The area of minimal wear has been determined. There has been detected the most efficient waste oil providing favorable conditions for resource-saving operation of the internal combustion engine. It is inferred that reduction of engine oil fume changes the main parameters of its aging. At the same time, the intensity of oil aging in main directions and of engine wear reduce from 0.75 to 2.25 g/(kW∙h), whereas the fume increases. Its further increase is accompanied by an increase in the rate of oil aging and engine wear. The detected "fracture" depending on И( g y) after passing the border g yopt = 2.25-2.5 g/(kW∙h) is stipulated by different ratio of oil exchange in the lubrication system and the ingress of gases into the crankcase. There has been determined the degree of oil burning, at which sludging and lacquer formation of the internal combustion engine is least intense. The smallest carbon deposits on pistons and in the crankcase of the engine can be observed when the diesel engine is operating in the zone of optimal carbonation. Experimentally, the dependence of tribotechnical properties, in particular, wear of insoluble products of oil aging has been detected at different degrees of oil burning. It is revealed that these characteristics also depend on the quality of the used fuels and lubricants and the conditions of formation and turnover of the oil film on the mirror of the cylinder, the thermal effect on it of the engine workflow. The result of simulation is the prediction of resource-saving operation of marine trunk diesel engines by maintaining oil fume at the optimal level.

scholarly journals Syngas from Updraft Gasifier Incineration for Internal Combustion Engine Power Generation in Klongluang PathumThani Thailand

2018 ◽  
Vol 187 ◽  
pp. 03002
Author(s):  
Krissadang Sookramoon
Keyword(s):  
Power Generation ◽  
Internal Combustion Engine ◽  
Gasoline Engine ◽  
Combustion Engine ◽  
Wood Chip ◽  
Engine Performance ◽  
Internal Combustion ◽  
Fuel Gas ◽  
Engine Power

This paper presents the internal combustion engine power generation using syngas from the updraft biomass gasifier as a fuel. 3 types of fuel such as Golden shower tree wood chip, charcoal, and gasohol 91 were tested for the engine running. The experiment was performed on July 25-26, 2017 at Faculty of Industrial Technology Vallaya Alongkorn Rajabhat University Pathum Tani Thailand. Data on the performance of the engines fueled with producer gas and gasohol 91 is presented. The experiment was carried out by using a four-stroke 13 HP gasoline engine coupled with a generator as a load in producing electricity. The carburetor was modified for fuel gas running by loading 7 kg/batch of Golden shower chips and charcoal for syngas producing and the engine performance was measured. The results showed that, the engine power was 110.125 W, 115.425 W, and 128.038 W, while using a golden shower chip, charcoal, and gasohol 91 as the fuel, respectively. The generator efficiency is 80% therefore the generator power reduces 20%. The test indicated that golden shower chips could produce higher quality of syngas than charcoal but the engine power has less power than fueled with gasohol 91.

Automation of an automobile internal combustion engine bench calibration tests

Trudy NAMI ◽  
2022 ◽  
pp. 12-21
Author(s):  
E. S. Evdonin ◽  
P. V. Dushkin ◽  
A. I. Kuzmin ◽  
S. S. Khovrenok ◽  
V. V. Kremnev
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Test Methods ◽  
Point Of View ◽  
Test Automation ◽  
Test Scenario ◽  
Additional Time ◽  
Original Part

Introduction (problem statement and relevance). The article presents the work on the automation of an internal combustion engine (ICE) calibration tests results on a motor stand. The relevance of the article is due to the high labor intensity of such tests, the complexity of documentation and decisionmaking based on the results of the work.Purpose of the study. This work is part of a comprehensive methodology, the purpose of which is to reduce the duration of tests and improve the calibration results quality of the vehicle’s power plant. The entire methodology description as a whole is also given in the publication.Methodology and research methods. The achievement of this goal is ensured with the help of special systems – INCA-FLOW (test automation) and ASCMO (processing results and optimization), produced by Bosch/ETAS. The approbation of the technique was carried out on a motor stand in the MADI training box in relation to the problem of forming an ignition timing map.Scientific novelty and results. As a result of the methodology application, a 4.8 times reduction in the motor tests duration takes place if 2 people work in manual mode at the test bench without interruption.At the same time, the variance of the adequacy of Sad of the torque empirical model Mk turned out to be, on average, 1.5 times less if the model was built according to the automated tests results. The obtained data indicated an improvement in the quality of measurements in the transition to automated test methods.From a scientific point of view, the most original part of the work is the application of the “Gaussian process” method to build empirical models. This method provides more accurate results than, for example, the traditional method of least squares.The practical significance of the work lies in the ability to considerably reduce routine actions on a motor stand, and the additional time spent on developing and testing a test scenario (program) is compensated for by the fact that scenario models can be used in the future for other similar tests. The proposed methodology makes it possible to cover a significant part of the internal combustion engine calibration tests. For example, you can apply it if you possess the preliminary information about the test object (basing on which you can draw up an experiment plan) and the engine is to be prepared either for a car road tests or tests under special conditions.

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