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ten Brink, H.M. (author), Hitzenberger, R. (author), Virkkula, A. (author)Air pollution by diesel traffic became a concern in the UK in the 1950s. Exposure levels were assessed via probing the light absorption of filter samples, which was translated to a mass concentration of “diesel smoke” (DS), based on the results of a measurements in the exhaust of a test diesel engine. We convert these DS values to concen...article 2022
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Giechaskiel, B. (author), Forloni, F. (author), Carriero, M. (author), Baldini, G. (author), Castellano, P. (author), Vermeulen, R. (author), Kontses, D. (author), Fragkiadoulakis, P. (author), Samaras, Z. (author), Fontaras, G. (author)Illegal manipulation (i.e., tampering) of vehicles is a severe problem because vehicle emissions increase orders of magnitude and significantly impact the environment and human health. This study measured the emissions before and after representative approaches of tampering of two Euro 6 Diesel light-duty passenger cars, two Euro VI Diesel heavy...article 2022
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Diepstraten, N. (author), Seykens, X.L.J. (author), Somers, L.M.T. (author)High Pressure Direct Injection (HPDI) is a promising combustion concept for the medium- to heavy-duty industry to combat climate change. It uses a pilot diesel injection to ignite the main fuel consisting of Natural Gas (NG). Both fuels are injected directly in the combustion chamber using a dedicated HPDI injector. A significant reduction in...conference paper 2021
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Willems, R. (author), Willems, F. (author), Simpson, T. (author), Albrecht, B. (author), Deen, N. (author), Somers, B. (author)CO2 regulations on heavy-duty transport are introduced in essentially all markets within the next decade, in most cases in several phases of increasing stringency. To cope with these mandates, developers of engines and related equipment are aiming to break new ground in the fields of combustion, fuel and hardware technologies. In this work, a...conference paper 2020
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van der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)Exhaust gas recirculation (EGR) is an often applied mechanism to suppress the emission of NOx in Diesel engines. EGR however, induces a pumping-loss, which reduces the fuel efficiency of the engine. The corresponding control problem is to track a reference EGR fraction, while simultaneously using the available actuators to minimize pumping-loss....conference paper 2019
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Mentink, P. (author), Escobar Valdivieso, D. (author), Forrai, A. (author), Willems, F.P.T. (author)Motivated by automotive emission legislations, a Virtual NOx sensor is developed. This virtual sensor consists of a realtime, phenomenological model that computes engine-out NOx by using the measured in-cylinder pressure signal from a single cylinder as its main input. The implementation is made on a Field Programmable Gate Array–Central...conference paper 2019
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Constrained multivariable extremum-seeking for online fuel-efficiency optimization of Diesel enginesvan der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)This work presents a new method for online fuel-efficiency optimization of Diesel engines, using constrained extremum-seeking. A two-input optimization problem, which is suitable for extremum-seeking, is integrated into a tracking control system. As a result, both air-path and fuel-path actuators are used for tracking and extremum-seeking. A key...article 2019
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Mentink, P. (author), Seykens, X. (author)Complying to both the increasingly stringent pollutant emissions as well as (future) GHG emission legislation - with increased focus on in-use real-world emissions - puts a great challenge to the engine/aftertreatment control development process. Control system complexity, calibration and validation effort has increased dramatically over the...conference paper 2019
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van der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)Advanced control concepts are required to maximize the fuel-efficiency of Diesel engines and to comply with emission legislation. The aim of this paper is to develop a controller that fully utilizes the fuel-path and air-path hardware, and is adaptive for real-world disturbances. The control design comprises a feedback control system, which uses...conference paper 2018
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Mora, J. (author), Willems, F.P.T. (author), Seykens, X.L.J. (author), Guardiola, C. (author)The most recent regulation for diesel engines with regards to NOx emissions and SCR systems considers stringent OBD requirements. In this paper, an observer of the ageing state is developed considering NO, NO2 and NH3 concentrations, the surface coverage ratio θNH3, and the ammonia storage capacity Ω as states. The observer is based on an...article 2018
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Hunicz, J. (author), Mikulski, M. (author)Low-temperature combustion in reciprocating engines appears to be a cutting-edge technology which ensures extremely low emissions of nitrogen oxides and particulate matters in parallel with high fuel efficiency. This mode of combustion can be realized in homogeneous charge compression ignition engines. However, this technology poses challenges,...article 2018
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Indrajuana, A. (author), Bekdemir, C. (author), Feru, E. (author), Willems, F. (author)The operation of a dual fuel combustion engine using combustion mode-switching offers the benefit of higher thermal efficiency compared to single-mode operation. For various fuel combinations, the engine research community has shown that running dual fuel engines in Reactivity Controlled Compression Ignition (RCCI) mode, is a feasible way to...conference paper 2018
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- Seykens, X. (author), Kupper, F. (author), Mentink, P. (author), Ramesh, S. (author) article 2018
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Kupper, F. (author), Forrai, A. (author), Indrajuana, A. (author), Weijst, R.V.D. (author), Keulen, T.V. (author), Willems, F.T.P. (author)Accurate estimation of Brake Specific Fuel Consumption (BSFC) is required to enable on-line optimization of real-world fuel efficiency of diesel engines. This work aims to develop a BSFC estimation method which is accurate enough for an adaptive controller for on-line engine optimization, e.g., using Extremum Seeking. In this paper two different...article 2018
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Feru, E. (author), Goyal, S. (author), Willems, F.P.T. (author)In this study, a methodology for optimal sizing of waste heat recovery (WHR) systems is presented. It deals with dynamic engine conditions. This study focuses on Euro-VI truck applications with a mechanically coupled Organic Rankine Cycle-based WHR system. An alternating optimization architecture is developed for optimal system sizing and...bookPart 2018
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Mentink, P. (author), Seykens, X. (author), Escobar Valdivieso, D. (author)To meet future emission targets, it becomes increasingly important to optimize the synergy between engine and aftertreatment system. By using an integrated control approach minimal fluid (fuel and DEF) consumption is targeted within the constraints of emission legislation during real-world operation. In such concept, the on-line availability of...article 2017
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Zarcone, M.C. (author), van Schadewijk, A. (author), Duistermaat, E. (author), Hiemstra, P.S. (author), Kooter, I.M. (author)Background: Exacerbations constitute a major cause of morbidity and mortality in patients suffering from chronic obstructive pulmonary disease (COPD). Both bacterial infections, such as those with non-typeable Haemophilus influenzae (NTHi), and exposures to diesel engine emissions are known to contribute to exacerbations in COPD patients....article 2017
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- Banerjee, R. (author), Mikulski, M. (author), Chakraborty, A. (author), Roy, S. (author), Bose, P.K. (author) article 2017
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Ntziachristos, L. (author), Papadimitriou, G. (author), Ligterink, N. (author), Hausberger, S. (author)Diesel NOx emissions have been at the forefront of research and regulation scrutiny as a result of failures of late vehicle technologies to deliver on-road emissions reductions. The current study aims at identifying the actual emissions levels of late light duty vehicle technologies, including Euro 5 and Euro 6 ones. Mean NOx emission factor...article 2016
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Feru, E. (author), Murgovski, N. (author), de Jager, B. (author), Willems, F.P.T. (author)This paper presents an integrated energy and emission management strategy, called Integrated Power- train Control(IPC), for an Euro-VI diesel engine with an electrified waste heat recovery system. This strategy optimizes the CO – NOx 2 trade-off by minimizing the operational costs associated with fuel consumption, AdBlue dosage,and active...article 2016