scholarly journals Analysis of the possibilities of using of DME fuel in motor boat drive systems

2017 ◽  
Vol 171 (4) ◽  
pp. 74-80
Author(s):  
Jacek KROPIWNICKI ◽  
Przemysław DOMINICZAK ◽  
Zbigniew KNEBA ◽  
Sławomir MAKOWSKI ◽  
Janusz CIEŚLIŃSKI ◽  
...  
Keyword(s):  
Control Systems ◽  
Dimethyl Ether ◽  
Internal Combustion Engines ◽  
Combustion Engines ◽  
Toxic Compounds ◽  
Small Vessels ◽  
Reduce Emissions ◽  
Drive Systems ◽  
And Control ◽  
Gas Supply

The characteristics of alternative fuel for diesel: dimethyl ether (DME) and an analysis of the potential to reduce emissions of toxic compounds by the engines when running on this fuel have been presented in this work. Basic types of design solutions of gas supply and control systems, possible for use in internal combustion engines with DME supply have been also presented. The paper presents a study of the legislation and an analysis of the feasibility of the system storage and fueling DME on board small vessels.

The effects of DLC-coated journal on improving seizure limit and reducing friction under engine oil lubrication

2021 ◽  
pp. 146808742110129
Author(s):  
Hidemi Ogihara ◽  
Takumi Iwata ◽  
Yuji Mihara ◽  
Makoto Kano
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Efficiency ◽  
Internal Combustion ◽  
Engine Oil ◽  
Combustion Engines ◽  
Main Bearing ◽  
Dlc Coating ◽  
Lubrication Regime ◽  
Mixed Lubrication Regime ◽  
Reduce Emissions

Internal combustion engines have been improved markedly in recent years through efforts to conserve resources, reduce emissions and improve fuel efficiency. In this regard, the authors have been working to reduce friction and improve the seizure properties of the crankshaft main journal and main bearing. These mechanical components of internal combustion engines incur large friction losses. In order to reduce friction, journals have been coated with a diamond-like carbon (DLC) coating, which has been reported to reduce friction in the fluid lubrication regime in recent years. Another current issue of journals and bearings is the need to improve seizure resistance. Therefore, these properties were evaluated for material combinations of aluminium alloy bearings and DLC-coated journals, which have low affinity. The results revealed that friction was reduced under a fluid lubrication regime and seizure resistance was improved under a mixed lubrication regime.

scholarly journals Review of the backfire occurrences and control strategies for port hydrogen injection internal combustion engines

Fuel ◽  
2022 ◽  
Vol 307 ◽  
pp. 121553
Author(s):  
Jianbing Gao ◽  
Xiaochen Wang ◽  
Panpan Song ◽  
Guohong Tian ◽  
Chaochen Ma
Keyword(s):  
Internal Combustion Engines ◽  
Control Strategies ◽  
Internal Combustion ◽  
Combustion Engines ◽  
And Control

Study and Investigation of Energy Management Techniques Used in Electric/Hybrid Electric Vehicles

2021 ◽  
Vol 54 (4) ◽  
pp. 599-606
Author(s):  
Punyavathi Ramineni ◽  
Alagappan Pandian
Keyword(s):  
Energy Management ◽  
Electric Vehicles ◽  
Internal Combustion Engines ◽  
Hybrid Electric Vehicles ◽  
Vital Role ◽  
Combustion Engines ◽  
Key Factor ◽  
Hybrid Electric ◽  
And Control ◽  
Intelligent Controllers

Many pollution-related issues are raising due to the usage of conventional internal combustion engines (ICEs) vehicles. Electric Vehicles/ Hybrid electric vehicles (EVs/HEVs) are the finest solutions to overcome those problems associated with ICE-based vehicles. The EVs are introduced with a signal energy source (SES), which is not a successful attempt, especially during transient vehicles, driving, etc. Multiple energy sources (MES) EVs are introduced to attain better performance than the SES vehicles, which is obtained by combining two sources like battery/fuel cells, ultracapacitor. In this contest, energy management (EMNG) plays a vital role in sharing the load to the sources as per the EVs requirement. In the case of MES-based EVs, the controller always plays a significant role in the related EMNG system because it is the key factor in improving vehicle efficiency. In this article, a study has mainly been done related to several conventional, intelligent controllers and control algorithms to do the proper EMNG between sources present in the EV.

A New Single-Zone Multi-Stage Scavenging Model for Real-Time Emissions Control in Two-Stroke Engines

2019 ◽  
Author(s):  
Abdullah U. Bajwa ◽  
Mark Patterson ◽  
Taylor Linker ◽  
Timothy J. Jacobs
Keyword(s):  
Gas Exchange ◽  
Internal Combustion Engines ◽  
Engine Performance ◽  
Combustion Engines ◽  
Thermodynamic State ◽  
Multi Stage ◽  
Exchange Processes ◽  
Proposed Model ◽  
Perfect Mixing ◽  
And Control

Abstract Gas exchange processes in two-stroke internal combustion engines, i.e. scavenging, remove exhaust gases from the combustion chamber and prepare the fuel-oxidizer mixture that undergoes combustion. A non-negligible fraction of the mixture trapped in the cylinder at the conclusion of scavenging is composed of residual gases from the previous cycle. This can cause significant changes to the combustion characteristics of the mixture by changing its composition and temperature, i.e. its thermodynamic state. Thus, it is vital to have accurate knowledge of the thermodynamic state of the post-scavenging mixture to be able to reliably predict and control engine performance, efficiency and emissions. Several simple-scavenging models can be found in the literature that — based on a variety of idealized interaction modes between incoming and cylinder gases — calculate the state of the trapped mixture. In this study, boundary conditions extracted from a validated 1-D predictive model of a single-cylinder two-stroke engine are used to gauge the performance of four simple scavenging models. It is discovered that the assumption of thermal homogeneity of the incoming and exiting gases is a major source of inaccuracy. A new non-isothermal multi-stage single-zone scavenging model is thus, proposed to address some of the shortcomings of the four models. The proposed model assumes that gas-exchange in cross-scavenged two-stroke engines takes place in three stages; an isentropic blowdown stage, followed by perfect-displacement and perfect-mixing stages. Significant improvements in the trapped mixture state estimates were observed as a result.

scholarly journals The concept of a new refrigerant in combustion engines in aspect of the requirements of modern drive systems

2019 ◽  
Vol 177 (2) ◽  
pp. 46-49
Author(s):  
Mateusz SZRAMOWIAT
Keyword(s):  
Heat Exchange ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Cooling System ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Cooling Systems ◽  
Drive Systems

The article presents currently applied construction solutions for currently used cooling systems for internal combustion engines. There were presented their defects and possible development directions were indicated. On this basis the concept of a cooling system which will enable the improvement of heat exchange in the internal combustion engine has been proposed.

scholarly journals Integration of kinematic and dynamic mathematical models of a two-axle electric car in the problem of estimating its stability on turns

ScienceRise ◽  
2021 ◽  
pp. 23-29
Author(s):  
Vadym Horeniuk
Keyword(s):  
Mathematical Models ◽  
Control Systems ◽  
Electric Drive ◽  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
The Road ◽  
On The Road ◽  
The Stability ◽  
Technological Product

Object of research: the process of movement of cars with internal combustion engines or the electric drive on a road curve. Investigation problem: assessment of the stability of cars with internal combustion engines or electric drive on a road curve and determination of conditions of its ensuring. The main scientific result. The article evaluated the stability of cars with internal combustion engines or electric drive on a road curve and determines the conditions of its ensuring using an algorithm that combines mathematical models of car movement on a road curve, synthesized based on balance equations of both kinematics and dynamics. The proposed models consider the change in speed of cars while driving on a road curve, and therefore belong to the class of differential equations. The analysis of these models allows calculating changes in time of values of limiting and critical speeds of movement of the car on a road curve. The article identifies the prospects of integration into this set of mathematical models another one, synthesized in the space of linguistic variables that characterize the uncertainty of the road surface and the degree of tire wear on different wheels of the car. The area of practical application of the research results: Automotive enterprises specializing in equipping cars with traffic control systems. Innovative technological product: A method of determining the limiting parameters of movement of the car on road curves, at which the car does not overturn while passing turns, and an algorithm for its implementation, which combines kinematic and dynamic mathematical models of car movement on the road curve. Scope of application of the innovative technological product: Equipping cars with additional control systems that assess the critical values of the traffic parameters on turns to ensure the conditions of non-overturning when the car passes these turns

scholarly journals Possibilities of development of internal combustion engines, including downsizing and rightsizing strategy

2019 ◽  
Vol 24 (6) ◽  
pp. 155-160
Author(s):  
Mateusz Bor ◽  
Marek Idzior ◽  
Wojciech Karpiuk ◽  
Rafał Smolec
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Combustion Engines ◽  
Design Strategies ◽  
Toxic Compounds ◽  
Advantages And Disadvantages ◽  
Economic Parameters ◽  
Further Development

The article discusses the development directions of the then internal combustion engines used in automotive vehicles. The regulations in force regarding permissible emission of harmful and toxic compounds force the vehicle manufacturers to systematically reduce their mass and improve the ecological and economic parameters of engines in order to meet stringent requirements. Favorable application parameters are obtained through the use of downsizing strategies and rightsisers in the construction of motors. The article presents both conceptional concepts. The most important features of downsizing and rightsizing engines, their advantages and disadvantages were determined. There is also described the direction of further development of internal combustion engines, which is characterized by the use of both design strategies.

scholarly journals Effect of CO2 content in CNG on the combustion process in a dual-fuel compression ignition engine

2015 ◽  
Vol 162 (3) ◽  
pp. 91-101
Author(s):  
Sławomir WIERZBICKI ◽  
Maciej MIKULSKI ◽  
Michał ŚMIEJA
Keyword(s):  
Combustion Process ◽  
Gaseous Fuel ◽  
Dual Fuel ◽  
Combustion Engines ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Toxic Compounds ◽  
Alternative Sources ◽  
Effective Use ◽  
And Control

Seeking alternative sources of energy for its more effective use, reducing emissions of toxic pollutants to the atmosphere and counteracting global warming are nowadays the major areas of development in the power industry, including the design of combustion engines. Currently, the research into the use of new fuels, which may be effective sources of energy, is performed by many scientific centres. The use of biogas for production of energy in cogeneration systems is one of the ways for improvement of energy balance. In the research described herein, a dual-fuel compression ignition engine was fuelled with gaseous fuel with variable CNG and CO2 ratios. The tests were performed for engine fuelling controlled by both an original controller with the software optimised for single-fuel operation and for the injection of a pilot dose of diesel controlled by a dedicated controller enabling the adjustment and control of the injection and dose parameters. This paper presents the effect of carbon dioxide content in gaseous fuel on the combustion process and emission of toxic compounds in the engine examined.

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