Comparison of Experimental and Simulated Transient Responses of a Turbocharged Diesel Engine

Benson, R. S.; Ledger, J. D.; Whitehouse, N. D.; Walmsley, S.

doi:10.4271/730666

Cited by 20 publications

(9 citation statements)

References 7 publications

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“…To the best of the authors' knowledge, the first thermodynamic models analyzing transient diesel engine operation were published in the early seventies at the University of Manchester, UMIST [14][15][16][17][18][19]. These models that are known as quasi-linear were based on the assumption that transient operation behaves as a series of steady-state operating points.…”

Section: Historical Overviewmentioning

confidence: 99%

“…Quasi-linear modeling plausibly fails to fulfil the second, third and sixth modeling specification mentioned above. A thorough discussion concerning their limitations can be found in [3,17].…”

Section: Quasi-linear Approachmentioning

confidence: 99%

“…This is defined from the inlet manifold temperature, T inl , adding a temperature rise factor to it, to account for combustion effects [3,5,17] …”

Section: Quasi-linear Approachmentioning

confidence: 99%

“…For air-fuel ratios lower than a critical value, a correction coefficient (termed relative thermal efficiency) was introduced to account for non-linearity between imep and injected fuel quantity m fi [17][18][19].…”

Section: Quasi-linear Approachmentioning

confidence: 99%

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Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Rakopoulos¹,

Giakoumis²

2006

SAE Technical Paper Series

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Study and modeling of transient operation is an important scientific objective. This is due to the fact that the majority of daily vehicle driving conditions involve transient operation, with non-linear situations experienced during engine transients. Thus, proper interconnection is needed between engine, governor, fuel pump, turbocharger and load. This paper surveys the publications available in the open literature concerning diesel engine simulations under transient operating conditions. Only those models that include both full engine thermodynamic calculations and dynamic powertrain modeling are taken into account, excluding those that focus on control design and optimization. Most of the attention is concentrated to the simulations that follow the filling and emptying modeling approach. A historical overview is given covering, in more detail, research groups with continuous and consistent study of transient operation. One of the main purposes of this paper is to summarize basic equations and modeling aspects concerning in-cylinder calculations, friction, turbocharger, engine dynamics, governor, fuel pump operation, and exhaust emissions during transients. The various limitations of the models are discussed together with the main aspects of transient operation (e.g. turbocharger lag, combustion and friction deterioration), which diversify it from the steady-state. Some of the most important findings in the field during the last 30 years are presented and discussed. The survey extends to special cases of transient diesel engine simulation, such as second-law analysis, response when the turbocharger compressor experiences surge, and whole vehicle performance. Several methods of improving transient response are also mentioned, based on the various simulations. An easy-to-read tabulation of all research groups dealing with the subject, that includes details about each model developed and engines/parameters studied, is also provided at the end of the paper.

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Section: Historical Overviewmentioning

confidence: 99%

Section: Quasi-linear Approachmentioning

confidence: 99%

“…This is defined from the inlet manifold temperature, T inl , adding a temperature rise factor to it, to account for combustion effects [3,5,17] …”

Section: Quasi-linear Approachmentioning

confidence: 99%

Section: Quasi-linear Approachmentioning

confidence: 99%

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Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Rakopoulos¹,

Giakoumis²

2006

SAE Technical Paper Series

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“…Turbine expansion ratio is mapped versus its swallowing capacity, turbocharger speed being a parameter, while turbine isentropic efficiency is represented by a single line (independently of turbocharger speed) against blade speed ratio. It is noted that turbine expansion ratio is corrected by a pulse factor, in an attempt to take into account the pulsating nature of exhaust gas flow exiting the engine cylinders [16].…”

Section: Linearized Quasi-steady Turbocharged Diesel Engine Modelingmentioning

confidence: 99%

Study of the Transient Behavior of Turbocharged Diesel Engines Including Compressor Surging Using a Linearized Quasi-Steady Analysis

Rakopoulos¹,

Michos²,

Giakoumis³

2005

SAE Technical Paper Series

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The transient operation of turbocharged diesel engines during turbocharger compressor surging is investigated through simulation. This form of compressor dynamic instability can generate large amplitude compressor mass flow and pressure rise oscillations, sometimes leading even to flow reversals, and may also induce severe torsional loading to the turbocharger shaft. A model predicting the dynamic behavior of the engine aircharging system when compressor surging occurs was developed in conjunction with a linearized quasi-steady diesel engine simulation code. This analysis possesses the advantage over the more detailed engine codes of basic simplicity, speed of calculation and no need of many engine and turbocharger components parameters given as input data. Emphasis is given to the correct modeling of the physics of the phenomena concerned. Transient operation runs, including critical cases for surging initiation, were applied for two similar six-cylinder diesel engines. The first one is a Ruston & Hornsby engine for light duty automotive diesel applications, while the second one is a MWM marine duty diesel engine. By analyzing simulation results, the effect of the engine inlet manifold volume and the compressor air duct length on the phenomenon of surging is studied.

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Multi-response optimization on the gasification of cocoa pod (Theobroma cacao) husk and its performance in a multi-fuel engine

Chockalingam

Gunasekaran

Santhappan³

2022

Biomass Conv. Bioref.

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Comparison of Experimental and Simulated Transient Responses of a Turbocharged Diesel Engine

Cited by 20 publications

References 7 publications

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Study of the Transient Behavior of Turbocharged Diesel Engines Including Compressor Surging Using a Linearized Quasi-Steady Analysis

Multi-response optimization on the gasification of cocoa pod (Theobroma cacao) husk and its performance in a multi-fuel engine

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