Investigation on Spray Quality of Diesel Nozzles Based on Precise Grinding Process

2014 ◽  
Vol 1039 ◽  
pp. 52-58
Author(s):  
Yu Jie Bai ◽  
Tao Yu ◽  
Hong Xia Cai ◽  
Shu Zhen Yang
Keyword(s):  
Internal Combustion Engines ◽  
Preparation Method ◽  
Orthogonal Experimental Design ◽  
Combustion Engines ◽  
Scoring Method ◽  
Manufacturing Method ◽  
System Pressure ◽  
Working Medium ◽  
The Relationship

Spray quality of Multi-hole nozzles decides the quality of diesels, but the control of spray is a hard work in the field of internal combustion engines. The spray quality can be changed by abrasive suspend jet which is a flexibility manufacturing method and the quality will vary with system pressure, abrasive kind, diameter of abrasive, preparation method, viscosity of working medium and grinding allowance and some other parameters. This paper tries to optimize the spray quality of nozzles by using orthogonal experimental design to select the values of these parameters. To evaluate the quality of spray, a scoring method was offered and input parameters were organized to three parameters before experiment. According to the orthogonal table of factor level (L16(45)), the line charters between the parameters and the spray quality was shown. This paper considers that the optimal combination is A2B2C2. Then the relationship between spray quality and the parameters optimized is deduced. And the significance of the forum was checked, it shows that the forum was significant at level α=0.01.

A New Concept of Externally Heated Engine—Comparisons with the Stirling Engine

1996 ◽  
Vol 210 (5) ◽  
pp. 363-371 ◽  
Author(s):  
L Brzeski ◽  
Z Kazimierski
Keyword(s):  
Low Power ◽  
Power Density ◽  
Internal Combustion Engines ◽  
Thermodynamic Cycle ◽  
Rotational Frequency ◽  
Stirling Engine ◽  
Maximum Pressure ◽  
Combustion Engines ◽  
Working Medium ◽  
Engine Cylinder

This paper presents a new concept of the externally heated valve (EHV) engine. Air can be used as a working medium in the closed cycle of this engine. Heat delivered to the working air can come from a combustion chamber or another heat generator of an arbitrary type. The engine construction and the thermodynamic cycle performed by it are original and entirely different from the well-known Stirling engine. The main disadvantage of the Stirling engine is its low power density, that is the low power obtained per litre of the engine cylinder volume. In the case of the engine presented here it is possible to achieve power density and efficiency similar to those typical of advanced internal combustion engines. Comparisons between the power of the Stirling engine and the power of the new engine have been performed for the same engine capacity, rotational frequency and maximum and minimum temperatures of the cycle. At the same minimum pressure of the working gas in both engines, the power of the EHV engine is several times higher than that of the Stirling engine, while, on the other hand, at the same maximum pressure of the working gas in both engines, the power of the EHV engine is 20 per cent higher than that of the Stirling engine power. The efficiencies of both engines do not differ significantly from each other.

Statistical Analysis for Multiple Non-Linear Knock Factors in Internal Combustion Engine

2014 ◽  
Vol 663 ◽  
pp. 373-380
Author(s):  
Azher Razzaq Hadi Witwit ◽  
Azman Yasin ◽  
Horizon Gitano ◽  
Mohammed Ismael Mahmood
Keyword(s):  
Statistical Analysis ◽  
Curve Fitting ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Engine Test ◽  
Factors Affecting ◽  
The Relationship ◽  
Fitting Model

In this study, we will address the problem of knocking in internal combustion engines, and some of the factors affecting the knocking, through the study of the power of the effect of each factor after finding a model representing the relationship between the factors. We found Curve fitting model from data that has been obtained through the engine test (1.3L Campro, modified to turbocharger, 4-cylinder, MPI). This model has been evaluated statistically after finding the parameters that intervened in the construction of that model.

Intercooler model for unsteady flows in engine manifolds

1998 ◽  
Vol 212 (2) ◽  
pp. 119-132 ◽  
Author(s):  
P A Bromnick ◽  
R J Pearson ◽  
D E Winterbone
Keyword(s):  
Heat Exchanger ◽  
Gas Dynamics ◽  
Internal Combustion Engines ◽  
Unsteady Flows ◽  
Cross Flow ◽  
Combustion Engines ◽  
Medium Speed ◽  
Mass Flowrate ◽  
Flow Heat ◽  
The Relationship

A model has been developed for intercoolers which are used to reduce the temperature of the charge air in turbocharged internal combustion engines. The detailed theory for the intercooler model is presented. The behaviour of the intercooler is characterized by the relationship between the number of transfer units ( NTU) and the effectiveness (ε) of the intercooler, which is assumed to be that of a cross-flow heat exchanger. The structure of the code used to implement the model is presented and the model is applied to simulate the gas dynamics in a medium-speed turbocharged and intercooled diesel engine. The results show the predicted variation of pressure, temperature and mass flowrate across the intercooler and also the variation of intercooler effectiveness with mass flowrate.

scholarly journals Quality Management of Aluminum Pistons with the Use of Quality Control Points

2020 ◽  
Vol 28 (1) ◽  
pp. 29-33
Author(s):  
Grzegorz Ostasz ◽  
Karolina Czerwińska ◽  
Andrzej Pacana
Keyword(s):  
Quality Control ◽  
Production Process ◽  
Internal Combustion Engines ◽  
Control Point ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Control Points ◽  
Control Methods ◽  
Aluminium Piston

AbstractThe publication analyses the way of managing and improving the quality of the production process of aluminum pistons for internal combustion engines. The aim of the article is to propose a method of analysis of the effectiveness of individual control methods used in the process of controlling the aluminium piston. Thanks to the location of a control point with the highest share of product non-compliance detection in the production process, it is possible to reduce quality control points by less effective points, which will contribute to lower costs or shorten the time of production processes. In view of the increasing demands on the efficiency of the checkpoints for components in internal combustion engines, the issue is important and topical.

Systematic Reduction of Detailed Chemical Reaction Mechanisms for Engine Applications

2017 ◽  
Vol 139 (9) ◽  
Author(s):  
Lars Seidel ◽  
Corinna Netzer ◽  
Martin Hilbig ◽  
Fabian Mauss ◽  
Christian Klauer ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Reactor Model ◽  
Mechanism Reduction ◽  
Rating Method ◽  
Chemical Reaction Mechanisms

In this work, we apply a sequence of concepts for mechanism reduction on one reaction mechanism including novel quality control. We introduce a moment-based accuracy rating method for species profiles. The concept is used for a necessity-based mechanism reduction utilizing 0D reactors. Thereafter a stochastic reactor model for internal combustion engines is applied to control the quality of the reduced reaction mechanism during the expansion phase of the engine. This phase is sensitive on engine out emissions, and is often not considered in mechanism reduction work. The proposed process allows to compile highly reduced reaction schemes for computational fluid dynamics application for internal combustion engine simulations. It is demonstrated that the resulting reduced mechanisms predict combustion and emission formation in engines with accuracies comparable to the original detailed scheme.

Assessing the power quality of internal combustion engines operating with different fuels

2016 ◽  
Vol 99 (3) ◽  
pp. 899-905
Author(s):  
Jesús Martínez Patiño ◽  
Miguel A. Hernández Figueroa ◽  
Martín Picón Núñez ◽  
Fernando Ireta Moreno ◽  
Jose Merced Lozano García
Keyword(s):  
Power Quality ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines

A CNC Manufacturing Method for Parts with Trochoidal Profile

2014 ◽  
Vol 14 (2) ◽  
pp. 103-113
Author(s):  
Sotiris L. Omirou ◽  
Marios M. Fyrillas
Keyword(s):  
Real Time ◽  
Internal Combustion Engines ◽  
Tool Path ◽  
Industrial Applications ◽  
Combustion Engines ◽  
Interpolation Algorithm ◽  
Cnc Milling ◽  
Manufacturing Method ◽  
Mechanical Parts ◽  
Milling Machines

AbstractThis paper presents a manufacturing method for parts with trochoidal profile on CNC milling machines. The method is based on a new real-time interpolation algorithm capable to drive the cutter along the offset of trochoid curves with precision equal to the resolution of the machine. The structure of the presented algorithm may be adapted accordingly so as to be used either for parts with an epitrochoidal or a hypotrochoidal profile. Both types of curves, known as trochoid curves, have important industrial applications such as gears with trochoidal tooth-profile, cams, trochoidal-shaped housings for rotary internal combustion engines and rotary piston pumps etc. The effectiveness and accuracy of the proposed method is verified by simulation tests of the generated tool path for the machining of two representative mechanical parts, an inner rotor of a hypogerotor pump and an epitrochoidal-shaped housing.

scholarly journals Supercapacitors and starting modes of a hybrid car engine

2021 ◽  
Author(s):  
V.S. Antipenko ◽  
S.V. Antipenko ◽  
S.A. Lebedev
Keyword(s):  
Quality Of Life ◽  
Low Temperatures ◽  
Internal Combustion Engines ◽  
Metropolitan Areas ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Hybrid Car ◽  
Start Up

Reducing the start-up time of internal combustion engines, especially at low temperatures and when the batteries are discharged, the use of supercapacitors leads to a reduction in emissions into the atmosphere, improving the quality of life in large metropolitan areas.

Energy and Civilization

2017 ◽  
Author(s):  
Vaclav Smil
Keyword(s):  
Plate Tectonics ◽  
Internal Combustion Engines ◽  
Fossil Fuels ◽  
Plant Biomass ◽  
Combustion Engines ◽  
Photovoltaic Generation ◽  
Energy Flows ◽  
Agriculture Industry ◽  
Life On Earth

Energy is the only universal currency; it is necessary for getting anything done. The conversion of energy on Earth ranges from terra-forming forces of plate tectonics to cumulative erosive effects of raindrops. Life on Earth depends on the photosynthetic conversion of solar energy into plant biomass. Humans have come to rely on many more energy flows—ranging from fossil fuels to photovoltaic generation of electricity—for their civilized existence. This book provides a comprehensive account of how energy has shaped society, from pre-agricultural foraging societies through today’s fossil fuel-driven civilization. Humans are the only species that can systematically harness energies outside their bodies, using the power of their intellect and an enormous variety of artifacts—from the simplest tools to internal combustion engines and nuclear reactors. The epochal transition to fossil fuels affected everything: agriculture, industry, transportation, weapons, communication, economics, urbanization, quality of life, politics, and the environment. This book describes humanity’s energy eras in panoramic and interdisciplinary fashion, offering readers a magisterial overview.

Sign in / Sign up

Export Citation Format

Share Document