Layer-by-layer mixing in engines with direct gasoline injection

2020 ◽  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Gasoline Engine ◽  
Combustion Engine ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Layer By Layer ◽  
Engine Fuel ◽  
Working Process ◽  
Layered Charge

Features of the design and operation of engines with direct injection of gasoline into the cylinders and layer-by-layer mixing are considered. Opportunities of improving the engine fuel efficiency and exhaust gases toxicity characteristics with this organization of the working process are shown. Problems arising when organizing such a working process of a gasoline engine are noted. Keywords internal combustion engine; diesel engine; gasoline engine; direct injection; layer-by-layer mixing; layered charge; lean mixture

Calculating Study of the Diesel Engine Working Process

2020 ◽  
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Fuel Injection ◽  
Combustion Engine ◽  
Fuel Efficiency ◽  
Engine Fuel ◽  
Gas Distribution ◽  
Working Process ◽  
Optimal Values ◽  
Efficiency Indicators

A calculating study of the working process of the D-245 diesel engine (4 ChN 11/12,5) produced by the Minsk motor plant is carried out. The influence of compression ratio, fuel injection advance angle and gas distribution phases on the fuel efficiency indicators of the diesel engine under consideration is studied. The optimal values of the diesel engine parameters in various modes of operation are determined. Keywords internal combustion engine, diesel engine, fuel efficiency, compression ratio, fuel injection advance angle, gas distribution phases

Analysis of Throttle Opening Variation Impact on a Diesel Engine Performance Using Second Law of Thermodynamics

2009 ◽  
Author(s):  
B. B. Sahoo ◽  
U. K. Saha ◽  
N. Sahoo ◽  
P. Prusty
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Engine Performance ◽  
Second Law Of Thermodynamics ◽  
Operating Conditions ◽  
Second Law ◽  
Engine Fuel ◽  
Availability Analysis ◽  
Second Law Analysis

The fuel efficiency of a modern diesel engine has decreased due to the recent revisions to emission standards. For an engine fuel economy, the engine speed is to be optimum for an exact throttle opening (TO) position. This work presents an analysis of throttle opening variation impact on a multi-cylinder, direct injection diesel engine with the aid of Second Law of thermodynamics. For this purpose, the engine is run for different throttle openings with several load and speed variations. At a steady engine loading condition, variation in the throttle openings has resulted in different engine speeds. The Second Law analysis, also called ‘Exergy’ analysis, is performed for these different engine speeds at their throttle positions. The Second Law analysis includes brake work, coolant heat transfer, exhaust losses, exergy efficiency, and airfuel ratio. The availability analysis is performed for 70%, 80%, and 90% loads of engine maximum power condition with 50%, 75%, and 100% TO variations. The data are recorded using a computerized engine test unit. Results indicate that the optimum engine operating conditions for 70%, 80% and 90% engine loads are 2000 rpm at 50% TO, 2300 rpm at 75% TO and 3250 rpm at 100% TO respectively.

scholarly journals Modern Approaches For Modeling Of Structure-Borne Noise Of The Internal Combustion Engine

2020 ◽  
Vol 16 (07) ◽  
pp. 105
Author(s):  
Andrey L. Yakovenko ◽  
Mikhail G. Shatrov ◽  
Andrey O. Glazkov ◽  
Sergey M. Kuznetsov ◽  
Igor V. Alekseev ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Acoustic Radiation ◽  
Operation Mode ◽  
Internal Combustion ◽  
Transient Operation ◽  
Working Process ◽  
Unsteady Operation ◽  
Modern Technologies

The article considers the structure of acoustic radiation of an internal combustion engine and modern technologies for noise research. Models of the internal combustion engine as a source of noise and methods for modeling the design and calculating the structure-borne noise of the engine at different stages of its design are described. The method of the engine structure-borne noise calculating for unsteady operation mode is presented. Differences in the working process of the engine for the transient operation mode are shown. Some results of calculations of diesel engine structure-borne noise for different operation modes using MADI methods and using the AVL EXCITE software are presented

The Emission Characteristics of the Emulsified Fuel and its Mechanism Research of Reducing Diesel Engine NOx Formation

2012 ◽  
Vol 550-553 ◽  
pp. 516-521
Author(s):  
Yu Xiang Ma ◽  
De Fu Wang ◽  
Rui Sun ◽  
Zhen Bin Chen
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Emission Characteristics ◽  
Engine Fuel ◽  
Nox Formation ◽  
Emulsified Fuel ◽  
No Formation ◽  
Physical Chemical ◽  
Mechanism Research

A non-turbocharged, direct-injection single-cylinder 1135 diesel engine was measured to investigate the engine fuel economy and emission characteristics with emulsified fuel that contains 18% water by volume. At the same time, the mechanism of reducing diesel engine NOX formation was discussed. The results showed that the diesel engine fueled with emulsified fuel leads to significant decrease in the emissions of soot and NOx and proper increase in fuel-efficiency without modifications in engine structures comparing with the diesel fuel. This paper analyzed that the water physical chemical role has an effect on reducing emulsified fuel thermal NO and prompt NO formation.

Analysis and Research of the Combustion Process of YN4100QB Diesel Engine

2013 ◽  
Vol 744 ◽  
pp. 35-39
Author(s):  
Lei Ming Shi ◽  
Guang Hui Jia ◽  
Zhi Fei Zhang ◽  
Zhong Ming Xu
Keyword(s):  
Diesel Engine ◽  
Internal Combustion Engine ◽  
Combustion Chamber ◽  
Optimization Design ◽  
Combustion Engine ◽  
Geometric Model ◽  
Combustion Process ◽  
Internal Combustion ◽  
Engine Combustion ◽  
Exhaust Noise

In order to obtain the foundation to the research on the Diesel Engine YN4100QB combustion process, exhaust, the optimal design of combustion chamber and the useful information for the design of exhaust muffler, the geometric model and mesh model of a type internal combustion engine are constructed by using FIRE software to analyze the working process of internal combustion engine. Exhaust noise is the main component of automobile noise in the study of controlling vehicle noise. It is primary to design a type of muffler which is good for agricultural automobile engine matching and noise reduction effect. The present car mufflers are all development means. So it is bound to cause the long cycle of product development and waste of resources. Even sometimes not only can it not reach the purpose of reducing the noise but also it leads to reduce the engine dynamic. The strength of the exhaust noise is closely related to engine combustion temperature and pressure. The calculation and initial parameters are applied to the software based on the combustion model and theory. According to the specific operation process of internal combustion engine. Five kinds of common operation condition was compiled. It is obtained for the detailed distribution parameters of combusted gas temperature pressure . It is also got for flow velocity of the fields in cylinder and given for the relation of the parameters and crankshaft angle for the further research. At the same time NOx emissions situation are got. The numerical results show that not only does it provide the 3D distribution data in different crank shaft angle inside the cylinder in the simulation of combustion process, but also it provides a basis for the engine combustion ,emission research, the optimization design of the combustion chamber and the useful information for the designs of muffler.

Ethanol as Internal Combustion Engine Fuel

Ethanol ◽  
2019 ◽  
pp. 215-229
Author(s):  
Risto Ilves ◽  
Arne Küüt ◽  
Jüri Olt
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Engine Fuel
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