Dynamic EGR Estimation for Production Engine Control

Müller, Martin; Olin, Peter M.; Schreurs, Bart

doi:10.4271/2001-01-0553

Cited by 14 publications

(2 citation statements)

References 5 publications

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“…The formation of particulates and NO x in diesels is extremely complex [4][5][6][7]. Generating experimental insight into dynamic engine behaviour has been particularly challenging [8][9][10][11][12][13][14][15][16]. Hence, while the relevance of emissions formation during transients has been recognized, the availability of scientific data pertaining to this issue is limited.…”

Section: Introductionmentioning

confidence: 99%

Cycle-resolved measurements of in-cylinder constituents during diesel engine transients and insight into their impact on emissions

Hagena

Assanis

Filipi

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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Diesel engine transients, in particular the rapid increase of load from idle, lead to significant excursions of operating parameters from normal, steady-state operation. A typical transient event is initiated by a sudden increase of fuelling followed by a turbo lag period. The trajectories of key parameters, such as boost pressure, air/fuel ratio, and amount of residual in the cylinder, depend on the complex interplay between the control system behaviour, actuator response, and time scales of physical processes. The end result is a significant deviation of the combustion event and emission formation. For example, it has been shown that transient spikes of soot may be responsible for up to half of total particulate emissions during a city driving cycle. The present paper introduces an experimental technique to quantify cycle-resolved pre-combustion in-cylinder constituents during transient engine operation and uses measurements to generate insight into mechanisms that cause increased emissions during a diesel engine transient event. A 6.0-litre V-8 diesel engine is instrumented for fuel injector needle lift and injection pressure measurements, cylinder pressure, simultaneous fast measurements of CO2 concentrations in the exhaust and in the cylinder, and fast measurements of NO and particulate spectrum. Analytical techniques are introduced to process measurements and determine cycle-resolved mass of fuel, air, and stoichiometric combustion products, thus providing insight into reasons for significant variations of emission during the transient. The technique is utilized to study engine behaviour over an FTP-72 driving cycle.

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Section: Introductionmentioning

confidence: 99%

Cycle-resolved measurements of in-cylinder constituents during diesel engine transients and insight into their impact on emissions

Hagena

Assanis

Filipi

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…An EGR cooler is an air-to-water device that works in conjunction with the EGR system, which is used for cooling the exhaust gases that go back into the engine through the intake manifold. For avoiding an unreasonable temperature of the exhaust gases returned to the engine combustion, the desired outlet gas temperature of the EGR cooler was usually controlled within an interval from 100 o C to 150 o C [4,5].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic simulation of exhaust gas recirculation coolers used on diesels based on finite element method

Wang

Tang

2008

2008 Asia Simulation Conference - 7th International Conference on System Simulation and Scientific Computing

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The thermodynamics of exhaust gas recirculation (EGR) coolers plays a very important role for reducing oxides of nitrogen (NO X ) emissions of diesel engines. Using the ANSYS software, some fluid thermodynamic models of EGR coolers were established by using the finite element method (FEM); and the temperature fields of gas fluids in the EGR coolers were simulated and verified by comparing the experimental results from some literatures. Based on the FEM models, furthermore, cooling efficiencies of the EGR coolers with different diffuser structures and different numbers of cooling tubes were analyzed and discussed. The comparison results show that, for the same dimension of EGR coolers, their cooling efficiencies can be increased up to five or thirteen percents by replacing their column diffusers with cone diffusers or by properly selecting the tube numbers of the EGR coolers.

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Control of a turbocharged Diesel engine fitted with high pressure and low pressure exhaust gas recirculation systems

Grondin

Moulin

Chauvin

2009

Proceedings of the 48h IEEE Conference on Decision and Control (CDC) Held Jointly With 2009 28th Chinese Control Conference

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Dynamic EGR Estimation for Production Engine Control

Cited by 14 publications

References 5 publications

Cycle-resolved measurements of in-cylinder constituents during diesel engine transients and insight into their impact on emissions

Cycle-resolved measurements of in-cylinder constituents during diesel engine transients and insight into their impact on emissions

Thermodynamic simulation of exhaust gas recirculation coolers used on diesels based on finite element method

Control of a turbocharged Diesel engine fitted with high pressure and low pressure exhaust gas recirculation systems

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