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Engineering Fundamentals of the Internal Combustion Engine
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In this article, the authors used an applied thermoscience textbook for an undergraduate course on internal combustion engines, where students were assumed to have knowledge of fundamental thermodynamics, heat transfer, and fluid mechanics as a prerequisite to get maximum benefit from the text.Abstract:
This book was written to be used as an applied thermoscience textbook in a onesemester, college-level, undergraduate engineering course on internal combustion
engines. It provides the material needed for a basic understanding of the operation
of internal combustion engines. Students are assumed to have knowledge of fundamental thermodynamics, heat transfer, and fluid mechanics as a prerequisite to get
maximum benefit from the text. This book can also be used for self-study and/or as
a reference book in the field of engineread more
Citations
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Journal ArticleDOI
Effect of Confluence Geometry of Dual Exhaust System on Quietness and Power
Il Seok Kang,Sung Mo Yang +1 more
TL;DR: In this article, the authors proposed an optimal geometry of an exhaust system for sports sedans with a V6 and above engine, and an experiment was conducted to evaluate the effect of confluence geometry on the silence of vehicle.
Journal Article
The first and second law analysis of a spark ignited engine fuelled with alternative fuels
Journal ArticleDOI
Investigation of the effects of inlet system configuration on the airflow characteristics
TL;DR: In this paper, the authors investigate the characteristic of the air intake system of a naturally-aspirated engine on a steady flow bench and show that the flow rate increases with each valve lift in a linear pattern until at a certain point where the value becomes constant.
DissertationDOI
Hybrid electric vehicle torque split algorithm for reduction of engine torque transients
TL;DR: A new approach is proposed for reducing the intensity of combustion in vehicles by using a mixture of low-tech materials and high-performance materials.
Dissertation
Experimental Analysis of the Discharge and Flow Coefficients of a Multivalve Internal Combustion Engine
Abstract: The search for newer ways to reduce emissions and fossil fuel consumption worldwide has be‐ come more urgent than ever since climate change was identified as the main challenge of the current century. Internal Combustion Engines (ICEs) are responsible for a large portion of emis‐ sions and, for this reason, a constant search for engine efficiency improvement has been made. The key to achieve an improved engine performance might be lying in the study of the airflow across the intake system since several factors and phenomena which considerably limit engine breathing and efficiency are identified. Being the major inlet flow restriction, the port‐valve assembly plays an important role in allowing the airflow to be drawn into the cylinder. In order to measure how efficient the induction process is, discharge and flow coefficients are defined and investigated under different intake conditions. In this sense, an experimental investigation aiming at the study of the fluid dynamic efficiency of a multi‐valve Spark‐Ignition (SI) engine during the induction stroke was carried out at the Propulsion laboratory of the University of Beira Interior (UBI). To this purpose, the effect of adding a throttle body to the inlet system and de‐ activating one inlet valve are analysed under static and dynamic conditions. Four throttle plate angles: 30, 50, 70, and 90o were tested along with an inlet configuration without a throttle plate. The experimental tests were conducted at a steady/unsteady flow rig in terms of dimensionless discharge and flow coefficients, in order to understand if the dynamic performance of the port‐ valve assembly can be predicted through steady discharge and flow coefficients. Throughout the tests, the pressure drop was kept constant at 13 kPa and the valve lift varied from 0.5 mm to 8.4 mm. During each measurement, the air mass flow, inlet temperature, valve upstream pressure and cylinder pressure are registered. The investigation highlights the influence of valve lift on engine breathing. Moreover, it demonstrates that adding a throttle body into the inlet system will result in reduced engine breathability in comparison to a configuration without a throttle plate. This study also indicates that deactivating one inlet valve, in multi‐valve engines, leads to higher discharge coefficients, while the conventional configuration results in higher flow co‐ efficients. The impact of the camshaft velocity on engine breathing is evaluated in terms of mean discharge and flow coefficients. The research shows that the discharge and flow coeffi‐ cients decrease slightly as the camshaft velocity increases. Overall, a good agreement between static and dynamic results was achieved, proving that steady coefficients can predict with good accuracy the unsteady behaviour of the intake port and valve.