Computer Simulation of Turbocharged Diesel Engines Under Transient Conditions

Schorn, N.; Pischinger, Franz; Schulte, Horst

doi:10.4271/870723

Cited by 21 publications

(14 citation statements)

References 1 publication

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“…All the c i (i=1-13) constants in the previous equations are derived after calibration against experimental data under transient conditions, so that there is no actual predictive capability here. Other, similar, equations can be found in [3,84,93,103,116].…”

Section: Governormentioning

confidence: 99%

“…When present, the waste gate valve should also be simulated, as for example in Refs [67,84]. The same holds for the intercooler that is usually modeled via its steady-state thermal effectiveness, being, mainly, a function of charge air mass flow [13].…”

Section: Frictionmentioning

confidence: 99%

“…[20][21][22][23][24]36,38,40,62,84,119] as regards load acceptance and acceleration cases. Some of the major conclusions derived are summarized below.…”

Section: Case Studies -Parametric Analysismentioning

confidence: 99%

“…[72][73][74][75][76][77][78][79][80][81][82][83] approach have been developed. The studies have concentrated on interesting issues such as effect of VGT [84][85][86], turbocharger match [87], thermal shock in engine structures [88], governor operation [89,90], exhaust emissions [91][92][93][94][95][96][97][98][99], vehicle cooling system [100], effect of compressor surging [101][102][103][104][105][106][107], electrically assisted turbocharging [108][109][110][111], vehicle performance [112][113][114][115][116], variable valve timing [117], sequential turbocharging [118] and marine diesel engine applications …”

Section: Historical Overviewmentioning

confidence: 99%

See 3 more Smart Citations

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: Governormentioning

confidence: 99%

Section: Frictionmentioning

confidence: 99%

“…[20][21][22][23][24]36,38,40,62,84,119] as regards load acceptance and acceleration cases. Some of the major conclusions derived are summarized below.…”

Section: Case Studies -Parametric Analysismentioning

confidence: 99%

Section: Historical Overviewmentioning

confidence: 99%

See 2 more Smart Citations

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Rakopoulos¹,

Giakoumis²

2006

SAE Technical Paper Series

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“…3. At present, the processes to design and use turbochargers with engine are calculated by computers for more accuracy and convenience when it needs to change any parameters of turbochargers (Watson and Marzouk, 1977;Watson, 1981;Winterbone and Backhouse, 1986;Shan-Chin and Goyal, 1986;Schorn et al, 1987;Ramos, 1989;Payri et al, 1995;2002;Benajes et al, 1996;1997;1998;Galindo et al, 2004). Nevertheless, actual tests with engine are still required to get correct results and find any errors made by calculation of computers (Galindo et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Thermal Efficiency of a Combined Turbocharger Set with Gasoline Engine

Kunanoppadon¹

2010

American Journal of Engineering and Applied Sciences

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Problem statement:The technology of turbocharger has been used with internal combustion engines since 1905 to increase intake air pressure prior to putting it into the cylinders to increase thermal efficiency of the engine. Based on previous researches and uses of turbochargers, the pattern of turbocharger installation remains the same, either in series or in parallel. Therefore, this research aims to study installation of the combined turbocharger. The combined turbocharger set comprised two turbochargers of the same size having exhaust turbine connected in parallel to let both turbochargers work simultaneously and having intake air compressor connected in series for two stage compress. Approach: This research aimed to study the thermal efficiency of a combined turbocharger set with gasoline engine. The study was done by comparing the thermal efficiency between the combined turbocharger set and the parallel turbocharger set. The variation of both temperature and pressure of the intake air and exhaust gas were also investigated. The engine used in the study was TOYOTA engine model 1JZ-GTE with six cylinders and a total displacement volume of 2,491 cc. The engine was already installed with parallel turbocharger from the factory, therefore, the thermal efficiency test of the parallel turbocharger case was conducted first. Then, the engine was modified to be a combined turbocharger set and tested by the same procedure. The test was run under the speed of 2,000-5,000 rpm. Results: According to the test, the combined turbocharger set gave higher thermal efficiency than the parallel turbocharger set in all range of speed. At the speed of 2,500, 3,000, 3,500, 4,000, 4,500 and 5,000 rpm, the thermal efficiency of the combined turbocharger set was equal to 39.37, 57.73, 79.30, 67.66, 60.63 and 55.05%, respectively. Meanwhile, the thermal efficiency of the parallel turbocharger set was equal to 15. 40, 22.61, 44.96, 55.21, 56.38 and 52.24%, respectively. Conclusion: It could be seen that the thermal efficiency of the combined turbocharger set was higher than that of the parallel set by 2.55 times at the speed range of 2,500-3,000 rpm. The efficiency of the combined turbocharger would be equal or higher than that of the parallel set by 1.05 times at the speed of 5,000 rpm.

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Diesel Engine Transient Operation

Rakopoulos¹,

Giakoumis²

2009

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Computer Simulation of Turbocharged Diesel Engines Under Transient Conditions

Cited by 21 publications

References 1 publication

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Review of Thermodynamic Diesel Engine Simulations under Transient Operating Conditions

Thermal Efficiency of a Combined Turbocharger Set with Gasoline Engine

Diesel Engine Transient Operation

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