Searched for: author%3A%22Willems%2C+F.%22
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Sastry, S. (author), Garg, P. (author), Silvas, E. (author), Willems, F. (author)
Complexity of engine control systems is continuously growing due to an increased number of subsystems and the need for robust performance. For traditional map-based as well as state-of-the-art model-based approaches, this will lead to unacceptable development costs and time for future engines. Parametrization of the embedded models using...
conference paper 2022
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Pan, W. (author), Bekdemir, C. (author), Willems, F. (author)
A model-based control approach is proposed to give proper reference for the feed-forward combustion control of Partially Pre-mixed Combustion (PPC) engines. The current study presents a simplified first principal model, which has been developed to provide a base estimation of the ignition properties. This model is used to describe the behavior...
conference paper 2022
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Verhaegh, J. (author), Kupper, F. (author), Willems, F. (author)
article 2022
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Kupper, F. (author), Mentink, P. (author), Avramis, N. (author), Meima, N. (author), Lazovik, E. (author), Wilkins, S. (author), Willems, F. (author)
Self-learning energy management is a promising concept, which optimizes real-world system performance by automated, on-line adaptation of control settings. In this work, the potential of self-learning capabilities related to optimization is studied for energy management in Plug-in Hybrid Electric Vehicles (PHEV). These vehicles are of great...
conference paper 2022
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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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Holmer, O. (author), Willems, F. (author), Blomgren, F. (author), Eriksson, L. (author)
Green zones are challenging problems for the thermal management systems of hybrid vehicles. This is because within the green zone the engine is turned off, and the only way to keep the aftertreatment system warm is lost. This means that there is a risk of leaving the green zone with a cold and ineffective aftertreatment system, resulting in high...
conference paper 2020
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Xia, L. (author), de Jager, B. (author), Donkers, T. (author), Willems, F. (author)
article 2020
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Verhaegh, J. (author), Kupper, F. (author), Willems, F. (author)
Reactivity Controlled Compression Ignition (RCCI) is a high efficient, pre-mixed combustion concept, which is characterized by controlled auto-ignition. RCCI control has to guarantee stable and safe operation for varying operating conditions. Research concentrated on next-cycle fuel path control, so far. However, a crucial step towards on-road...
article 2020
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Willems, R. (author), Willems, F. (author), Deen, N. (author), Somers, B. (author)
The understanding of reactivity controlled compression ignition has greatly improved throughout recent years. While its potential for extremely low NOx and soot emissions has been confirmed numerous times, there remain some ambiguities about the ability of this concept to attain very high efficiency. Now that increasingly stringent CO2...
article 2020
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van Ommeren, C. (author), Willems, F. (author), Paardekooper, J.W. (author), Bakri, T. (author), Beekelaar, R. (author)
Artificiële intelligentie (AI) is geïdentificeerd als één van de speerpunten in Nederlandse kennisontwikkeling voor de komende jaren.1,2,3. Dit document dient als input voor de nationale onderzoeksagenda op het gebied van AI en omschrijft een aantal belangrijke kennis- en toepassingsgebieden voor AI in mobiliteit en transport. Het doel van dit...
other 2020
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Willems, F. (author), Kupper, F. (author), Ramesh, S. (author), Indrajuana, A. (author), Doosje, E. (author)
Reactivity Controlled Compression Ignition (RCCI) combines very high thermal efficiencies with ultra-low engine out NO x and PM emissions. Moreover, it enables the use of a wide range of fuels. As this pre-mixed combustion concept relies on controlled auto-ignition, closed-loop combustion control is essential to guarantee safe and stable...
conference paper 2019
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Xia, L. (author), Willems, R. (author), Jager, B.D. (author), Willems, F. (author)
Fuel efficiency optimization and emission reduction have become essential parts of engine research, due to the growing demand for environmental protection. In this paper, a computationally efficient optimization method has been applied to maximize the fuel efficiency under constraints of maximum pressure rise rate and various pollutant emissions...
conference paper 2019
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Willems, F. (author), van Gompel, P. (author), Seykens, X. (author), Wilkins, S. (author)
This work gives an outlook on the potential of automated driving functions (ADFs) to reduce real-world CO2 and pollutant emissions for heavy-duty powertrains. Up to now, ADF research mainly focuses on increased traffic safety, driver comfort, and road capacity. Studies on emissions are lacking. By taking the driver out-of-the-loop, cycle-to...
conference paper 2019
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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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Luo, X. (author), Donkers, M.C.F. (author), de Jager, B. (author), Willems, F. (author)
With multiple fuel injections per combustion cycle, the advanced diesel combustion process depends on all injection pulses in a coupled way. This makes the control of the multipulse fuel injection profile challenging, and the currently employed decoupled design methods might fail to guarantee closed-loop stability. Without explicit consideration...
article 2018
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Ramachandran, S.N. (author), Hommen, G. (author), Mentink, P. (author), Seykens, X. (author), Willems, F. (author), Kupper, F. (author)
Heavy-duty diesel engines are used in a wide range of applications. For varying operating environments, the engine and aftertreatment system must comply with the real-world emission legislation limits. Simultaneously, minimal fuel consumption and good drivability are crucial for economic competitiveness and usability. Meeting these requirements...
article 2016
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Mentink, P. (author), van den Nieuwenhof, R. (author), Kupper, F. (author), Willems, F. (author), Kooijman, D. (author)
Heavy-duty diesel engines are used in different application areas, like long-haul, city distribution, dump truck and building and construction industry. For these wide variety of areas, the engine performance needs to comply with the real-world legislation limits and should simultaneously have a low fuel consumption and good drivability. Meeting...
article 2015
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Bekdemir, C. (author), Baert, R. (author), Willems, F. (author), Somers, B. (author)
For natural gas (NG)-diesel RCCI, a multi-zonal, detailed chemistry modeling approach is presented. This dual fuel combustion process requires further understanding of the ignition and combustion processes to maximize thermal efficiency and minimize (partially) unburned fuel emissions. The introduction of two fuels with different physical and...
article 2015
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Kulah, S. (author), Donkers, T. (author), Willems, F. (author)
Cylinder pressure-based combustion control is widely introduced for passenger cars. Benefits include enhanced emission robustness to fuel quality variation, reduced fuel consumption due to more accurate (multi-pulse) fuel injection, and minimized after treatment size.In addition, it enables the introduction of advanced, high-efficient combustion...
article 2015
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Feru, E. (author), de Jager, B. (author), Willems, F. (author), Steinbuch, M. (author)
This paper presents the modeling and model validation for a modular two-phase heat exchanger that recovers energy in heavy-duty diesel engines. The model is developed for temperature and vapor quality prediction and for control design of the waste heat recovery system. In the studied waste heat recovery system, energy is recovered from both the...
article 2014
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