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Bengt Johansson

Researcher at Umeå University

Publications -  647
Citations -  22112

Bengt Johansson is an academic researcher from Umeå University. The author has contributed to research in topics: Combustion & Homogeneous charge compression ignition. The author has an hindex of 66, co-authored 635 publications receiving 19206 citations. Previous affiliations of Bengt Johansson include Lund University & Chalmers University of Technology.

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Proceedings ArticleDOI

A Study on In-Cycle Control of NOx Using Injection Strategy with a Fast Cylinder Pressure Based Emission Model as Feedback

TL;DR: In this article, the possibility to control NOx (nitrogen oxides) formation with a crank angle resolved NOx estimator as feedback is presented. But, the estimation results indicate that the delay between fuel injection and the maximum NOx concentration is too long.
Proceedings ArticleDOI

Influence of Injection Timing on Exhaust Particulate Matter Emissions of Gasoline in HCCI and PPC

TL;DR: In this article, particle size distribution measurements were performed from HCCI-like combustion with very early (120 CAD BTDC) to Partially Premixed Combustion (PPC combustion with late injection timing) at two intake oxygen rates, 21% and 15% respectively.
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Assessment of the relative dose distribution around an 192Ir line source using a liquid ionization chamber.

TL;DR: The ability of the LIC for mapping the dose distribution around a low-dose-rate brachytherapy source emitting photons of intermediate energies is demonstrated, in reasonably good agreement with the theoretical data as well as the results held with LiF.
Proceedings ArticleDOI

Multi Cylinder Partially Premixed Combustion Performance Using Commercial Light-Duty Engine Hardware

TL;DR: In this article, the performance of a 2.01 SAAB VGT turbocharged diesel engine running with partially premixed combustion (PPC) using commercial diesel engine hardware was investigated and the results indicated that a simple PPC engine with standard diesel hardware with the addition of LP-EGR and using RON 70 gasoline could be an interesting option trading off some efficiency for complexity and hardware cost.
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Ischemic ECG abnormalities are associated with an increased risk for death among subjects with COPD, also among those without known heart disease

TL;DR: I-ECG was associated with an increased risk for death in COPD, independent of common confounders and disease severity, and was of prognostic value also among those without previously known heart disease.