Author: Matthew W. SnyderPublisher:
ISBN:
Category :
Languages : en
Pages : 164
Book Description
Transient Multi-cylinder Intake Dynamics Simulated on a Single Cylinder Engine
Author: Matthew W. SnyderDesign of a Controlled Transient Cooling System to Simulate Multi-cylinder Engine Cooling Dynamics on a Single-cylinder Engine
Author: Stephen J. KlickDesign and Analysis of a Turbocharged Single Cylinder Diesel Engine Intake System for Increased Power Output and Transient Response
Author: Orlando Ward-SantosPublisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Small displacement, single-cylinder diesel engines have many applications in developing countries such as small-powered agricultural equipment, water pumps, and other power sources. Research has shown that the power of a turbocharged single-cylinder engine can match that of a larger displacement multi-cylinder, naturally aspirated engine, at a fraction of the cost. The valve timing mismatch that occurs when turbocharging a single cylinder engine is solved by adding a large volume air intake as a buffer for the pressurized air. This thesis explores the design, methodology, and testing of modifying the additional air intake to passively varying its volume during operation. Mechanical design of the variable volume air capacitor is established. Next, the experimental setup is discussed. Finally, both steady state and transient experimental results are discussed.
1D and Multi-D Modeling Techniques for IC Engine Simulation
Author: Angelo OnoratiPublisher: SAE International
ISBN: 0768099528
Category : Technology & Engineering
Languages : en
Pages : 552
Book Description
1D and Multi-D Modeling Techniques for IC Engine Simulation provides a description of the most significant and recent achievements in the field of 1D engine simulation models and coupled 1D-3D modeling techniques, including 0D combustion models, quasi-3D methods and some 3D model applications.
A Time Domain Analytical Approach to Predict the Primary Intake Runner Dynamics of a Single Cylinder Engine
Author: Shankar KumarPublisher:
ISBN:
Category : Internal combustion engines
Languages : en
Pages : 216
Book Description
Abstract: The wave dynamics in the intake system of internal combustion engines plays an important role in determining the engine performance characterized by the volumetric efficiency and torque. Numerous studies have been carried out to understand the nature of the wave action by investigating the pressure and velocity fluctuations in the intake system and their influence on engine performance. The complexities involved with the presence of multiple cylinders and plenums, have promoted the use of single cylinder (SC) engines as a simpler tool to measure and predict the behavior of acoustic waves in the intake system. Even with the SC engines, the acoustic phenomenon is complicated by factors such as the geometry of the intake port and runner, the intake valve lift profile, the pulsating fluid flow due to the piston motion, the backflow of fresh charge/exhaust gases into the intake duct, and the complex nature of the viscous and separation losses. Typically, the pressure fluctuations are studied computationally by solving the NavierStokes equations and validated experimentally. Pure analytical techniques to predict the dynamics of the intake system are rare, and can be grouped as time- and frequencydomain based methods. Both methods available in the literature rely heavily on the experimental data and are restricted to rather narrow engine geometry and operating conditions. The present work is aimed at studying the acoustic characteristics of the induction system of a Ford SC research engine. A time-domain based analytical formulation has been developed to estimate the pressure field in the intake system. The objective is to capture the effect of time-varying piston and valve motion on the acoustics of the induction system. These results have been compared with the experimental data and the numerical predictions (performed using Ford Motor company's engine simulation code MANDY), to identify the applicability as well as the potential limitations of the analytical model. The analytical pressure predictions have subsequently been used to calculate the acoustic velocities in the intake duct, hence the volumetric efficiency at various engine speeds. The mathematical technique developed in the present work is expected to be useful because of its simplicity and the insights it could offer into the understanding of the physical processes.
A New Transient Dynamometer Test System for Cold Start Testing and Controls Development
Author: Brian D. KrosschellElectronic Engine Controls
Author: International Journal of Vehicle Design
Author: Diesel Engine Transient Operation
Author: Constantine D. RakopoulosPublisher: Springer Science & Business Media
ISBN: 1848823754
Category : Technology & Engineering
Languages : en
Pages : 408
Book Description
Traditionally, the study of internal combustion engines operation has focused on the steady-state performance. However, the daily driving schedule of automotive and truck engines is inherently related to unsteady conditions. In fact, only a very small portion of a vehicle’s operating pattern is true steady-state, e. g. , when cruising on a motorway. Moreover, the most critical conditions encountered by industrial or marine engines are met during transients too. Unfortunately, the transient operation of turbocharged diesel engines has been associated with slow acceleration rate, hence poor driveability, and overshoot in particulate, gaseous and noise emissions. Despite the relatively large number of published papers, this very important subject has been treated in the past scarcely and only segmentally as regards reference books. Merely two chapters, one in the book Turbocharging the Internal Combustion Engine by N. Watson and M. S. Janota (McMillan Press, 1982) and another one written by D. E. Winterbone in the book The Thermodynamics and Gas Dynamics of Internal Combustion Engines, Vol. II edited by J. H. Horlock and D. E. Winterbone (Clarendon Press, 1986) are dedicated to transient operation. Both books, now out of print, were published a long time ago. Then, it seems reasonable to try to expand on these pioneering works, taking into account the recent technological advances and particularly the global concern about environmental pollution, which has intensified the research on transient (diesel) engine operation, typically through the Transient Cycles certification of new vehicles.
Author: Austin R. Lemke