Feedback control of particulate matter and nitrogen oxide emissions in diesel engines

Tschanz, Frédéric; Amstutz, Alois; Onder, Christopher H.; Guzzella, Lino

doi:10.1016/j.conengprac.2012.09.014

Cited by 45 publications

(26 citation statements)

References 21 publications

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“…This increased AFR has significantly contributed on the reduction of the engine`s soot formation. Figure 15(e) illustrates the engine BSFC and turbo total efficiency traces, Equation (12). It can be seen that the BSFC of the engine with the fuzzy logic scheme is generally lower than that of the engine with the conventional system.…”

Section: Results and Discussion 51 Proposed Control Scheme Comparedmentioning

confidence: 99%

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

Cheng

Dimitriou

Wang

et al. 2018

International Journal of Engine Research

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Variable geometry turbocharger and exhaust gas recirculation valves are widely installed on diesel engines to allow optimized control of intake air mass flow and exhaust gas recirculation ratio. The positions of variable geometry turbocharger vanes and exhaust gas recirculation valve are predominantly regulated by dual-loop proportional–integral–derivative controllers to achieve predefined set-points of intake air pressure and exhaust gas recirculation mass flow. The set-points are determined by extensive mapping of the intake air pressure and exhaust gas recirculation mass flow against various engine speeds and loads concerning engine performance and emissions. However, due to the inherent nonlinearities of diesel engines and the strong interferences between variable geometry turbocharger and exhaust gas recirculation, an extensive map of gains for the P, I, and D terms of the proportional–integral–derivative controllers is required to achieve desired control performance. The present simulation study proposes a novel fuzzy logic control scheme to determine appropriate positions of variable geometry turbocharger vanes and exhaust gas recirculation valve in real-time. Once determined, the actual positions of the vanes and valve are regulated by two local proportional–integral–derivative controllers. The fuzzy logic control rules are derived based on an understanding of the interactions among the variable geometry turbocharger, exhaust gas recirculation, and diesel engine. The results obtained from an experimentally validated one-dimensional transient diesel engine model showed that the proposed fuzzy logic control scheme is capable of efficiently optimizing variable geometry turbocharger and exhaust gas recirculation positions under transient engine operating conditions in real-time. Compared to the baseline proportional–integral–derivative controllers approach, both engine’s efficiency and total turbo efficiency have been improved by the proposed fuzzy logic control scheme while NOx and soot emissions have been significantly reduced by 34% and 82%, respectively.

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Section: Results and Discussion 51 Proposed Control Scheme Comparedmentioning

confidence: 99%

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

Cheng

Dimitriou

Wang

et al. 2018

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…In this area the interactions between the EGR valve, VGT and the nonlinearity of the system makes for an interesting control problem with a wide variety of proposed solutions (Nieuwstadt et al 2000;Jankovic et al 2000;Ammann et al 2003;Wahlström et al 2010;Wahlström and Eriksson 2011a, 2011b. Slow sensor dynamics have led to research in observers, feedforward and other methods of compensation for engines with and without EGR (Jankovic and Kolmanovsky 2009;Yildiz et al 2010;Tschanz et al 2013). Observer designs have also been proposed for cost reduction or to estimate engine variables that are difficult to measure (Zhao and Wang 2013;Poloni et al 2014;Zhao and Wang 2015).…”

Section: Engine Processesmentioning

confidence: 99%

Robustness analysis of dual actuator EGR controllers in marine two-stroke diesel engines

Eriksson

Llamas

2020

Journal of Marine Engineering & Technology

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Exhaust Gas Recirculation (EGR) was recently introduced in large marine two-stroke diesel engines to reduce NO x -emissions. Controlling EGR flow during accelerations, while keeping good acceleration performance is challenging, due to delays in the scavenge receiver oxygen measurement and upper limits on fuel for avoiding black smoke. Previous oxygen feedback controllers struggled during accelerations, but a new EGR-controller based on adaptive feedforward (AFF) has been successful. Nevertheless, further analysis and tests are required before deploying the controller to more EGR ships. A simulation platform is a great asset to test controllers before expensive real-world experiments are conducted. A new EGR flow controller is proposed and tested in a complete ship simulation model. Several acceleration scenarios show that the low load area is most challenging. Controller robustness is analysed in this area, showing that pressure sensor bias in the EGR flow estimator is the most critical factor, which could lead to black smoke formation. This can be prevented with sensor calibration or by using a differential pressure sensor. Errors in the parameters of the flow estimators are not as important. This is a useful result because the right parameters of the flow estimators might be difficult to obtain, on a new engine. ARTICLE HISTORY

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“…Feedback error learning of a RBF network is used by Park et al 29,30 to control the location of the peak pressure in a spark-ignited engine. Tschanz et al 31 used an adaptive lookup table as an operating-point dependent integrator to control engine-out NO x . Yoon et al 26 used a linear feedback controller together with a feedforward controller based on a RBF network in order to control the start of combustion in a common-rail direct injection diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Fast and robust adaptation of lookup tables in internal combustion engines: feedback and feedforward controllers designed independently

Zurbriggen

Ott

Onder

2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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Adaptive feedforward control is a common approach for handling uncertainties and time-varying effects in automotive control applications. The adaptation of the feedforward controller, usually formed by a lookup table, is often combined with a linear feedback controller. The feedforward controller is used to overcome the nonlinearities that are due to variations of the operating point. The feedback controller is used to deal with fast disturbances. If the system behavior is changing, for example due to varying fuel qualities or aging effects, the feedforward controller has to be adapted. A common problem is the fact that the bandwidths of the feedback controller and the adaptation of the feedforward controller have to be separated, i.e. the adaptation of the feedforward controller has to be slower than the feedback controller. Otherwise, the coupling effects lead to an unexpected behavior of the control system, which may also lead to instability. This paper presents an analysis of this effect using a linear representation of the adaptation of the feedforward controller. Based on the results of this analysis, the paper presents a method to decouple the feedback controller and the adaptation of the feedforward controller, which allows a fast adaptation of the feedforward controller. Ideally, the adaptation is as fast as the feedback controller. The system is then able to adapt during operating point transients without the need to stay at some operating points for longer periods. The proposed method does not depend on the structure of the feedforward controller, nor does it depend on the method of the adaptation. Experiments on a natural gas-diesel dual-fuel engine are used to validate the proposed method.

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Feedback control of particulate matter and nitrogen oxide emissions in diesel engines

Cited by 45 publications

References 21 publications

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

A novel fuzzy logic variable geometry turbocharger and exhaust gas recirculation control scheme for optimizing the performance and emissions of a diesel engine

Robustness analysis of dual actuator EGR controllers in marine two-stroke diesel engines

Fast and robust adaptation of lookup tables in internal combustion engines: feedback and feedforward controllers designed independently

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