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HCCI (Homogeneous Charge Compression Ignition) is a very control-intensive combustion concept which has been studied for over a decade because of its favorable combination of high efficiency and low emissions. Various optimal control methods have been applied to HCCI and this chapter gives an overview of them. Optimal control of HCCI can be divided into model based and non-model based where MPC is

Partially premixed combustion is a compression ignited combustion strategy where high exhaust gas recirculation (EGR) levels in combination with early or late injection timing result in a prolonged ignition delay yielding a more premixed charge than with conventional diesel combustion. With this concept it is possible to get low smoke and NOx emissions simultaneously. Accurate control of injection

Previous research carried out by the authors described the role of dual-fuel combustion efficiency on overall engine efficiency at high diesel substitution ratio. At low loads, high diesel substitution ratios result in excessive total unburned hydrocarbon emissions due to bulk flame quenching, and consequently lower substitution ratios in combination with intake air heating, throttling and increas

Hybrid powertrains have become a very attractive technology over the last ten years due to their potential for lowering fuel consumption and emissions. A large portion of all manufacturers worldwide are now focusing on hybrid electric powertrains, which are the most common hybrid powertrains of today. However, in recent years a new technology has emerged, namely the pneumatic hybrid powertrain. Al

The effects of fuel properties on the performance and emissions of an engine running in partially premixed combustion mode were investigated using nine test fuels developed in the gasoline boiling point range. The fuels covered a broad range of ignition quality and fuel chemistry.The fuels were characterized by performing a load sweep between 1 and 12 bar gross IMEP at 1000 and 1300 rpm. A heavy d

In the study presented in this paper a single-cylinder Scania D12 diesel engine has been converted to work as a pneumatic hybrid. During pneumatic hybrid operation the engine can be used as a 2-stroke compressor for generation of compressed air during vehicle deceleration and during vehicle acceleration the engine can be operated as an air-motor driven by the previously stored pressurized air.The

Partially premixed combustion aims to reduce NOx and particulate matter emission without fuel consumption penalty. Low temperature reactions are important for the partially premixed combustion. In the current study, a self-adaptive strategy is introduced to predict the motoring pressure by means of an equivalent isentropic index. The start of the low temperature reactions is detected when the pres

Stability constants, βn, n = 1, 2, 3, 4, for the chloro and bromo complexes of palladium(II) have been calculated, using a least squares programme, from spectrophotometric measurements at 222, 234.5 and 279 nm (chloride) and at 247, 265, and 332 nm (bromide). The following values of lg(βn/M−n) were obtained: 4.47±0.01, 7.76±0.04, 10.17±0.07, and 11.54±0.09 (chloride) and 5.17±0.02, 9.42±0.04, 12.7

Partially premixed combustion with low octane fuel aims to reduce NOx and soot emission simultaneously without fuel consumption penalty. Cylinder pressure based combustion phase control is an essential technology for partially premixed combustion. A novel closed-loop combustion phase control strategy for multiple combustion modes is proposed in the current study. The combustion modes are classifie

Active pre-chamber configurations are considered a valuable solution for improving the operation of the internal combustion engine, in the view to overcome the many challenges it has been made to face. Combining this technology with the use of natural gas, a fuel that has increasing availability and interest in the market share, it is possible to burn ultra-lean mixtures (with air-to-fuel ratios,

Background: About two-thirds of patients with Alzheimer’s disease (AD) are women, mostly because of their longer life-span and the higher prevalence of AD among older persons. A more-pronounced association between AD pathology and dementia (faster brain atrophy) and more-rapid cognitive decline have been reported in women. The AD prognosis might be affected by, e.g., size of cerebral hemispheres,

We present ICARUS, a versatile graphical search tool to query dependency treebanks. Search results can be inspected both quantitatively and qualitatively bymeans of frequency lists, tables, or dependency graphs. ICARUS also ships with plugins that enable it to interface with tool chains running either locally or remotely.

Dammar som samlar fosfor Jordbruksinformation 11-2010 2 Text: Katarina Börling Omslagsfoto: Katarina Börling Grafisk form: Holmbergs i Malmö AB 3 Inledning Denna broschyr vänder sig till dig som funderar på att anlägga en damm som samlar fosfor. Här hittar du information om vad du ska tänka på innan du börjar, praktiska råd kring hur dammen ska anläggas och en presentation av tidigare erfarenheter

https://www.nateko.lu.se/sites/nateko.lu.se/files/jordbruksverket_11-2010_0.pdf - 2026-05-24

Att gestalta kön berättelser om scenkonst, makt och medvetna val Gunilla Edemo & Ida Engvoll (red.) Att gestalta kön Berättelser om scenkonst, makt och medvetna val utgiven av teaterhögskolan i stockholm isbn: 978-91-978534-9-1 huvudredaktör: Gunilla Edemo redaktör: Ida Engvoll ansvarig utgivare: Olle Jansson illustrationer: Bianca Kronlöf foto: Christine Ohlsson, Scanpix (www.scanpix.se) grafiska

https://www.thm.lu.se/sites/thm.lu.se/files/r02.pdf - 2026-05-24

Manual on Conducting a National Inquiry into Systemic Patterns of Human Rights Violation Note The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the APF or RWI concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers

https://rwi.lu.se/app/uploads/2012/09/Conducting_National_Inquiries_Manual.pdf - 2026-05-24

Brevmall 2018-08-08 Besöksadress Telefon dir Växel E-post Internet Sölvegatan 37 046-222 3782 046-222 0000 Yvonne.Persson@cec.lu.se http://www.cec.lu.se.lu.se Mi l jövetenskapl ig utb i ldn ing Centrum för mi l jö- och k l imatforskn ing Välkommen till Miljövetenskap grundkurs MVEA01 - HT 2018 Detta brev skickas till dig som är antagen till: naturvetenskapligt kandidatprogram i Miljövetenskap natu

https://www.cec.lu.se/sv/sites/cec.lu.se.sv/files/valkomstbrev_mvea01_ht18.pdf - 2026-05-24

Studieverkstaden Individuell handledning, kurser, föreläsningar Via mejl: studieverkstad@stu.lu.se Via telefon: 046-222 43 92 Läs mer på vår hemsida: www.lu.se/studieverkstad Studieverkstaden Boka en tid! Presentatör Presentationsanteckningar Om du någon gång under kursen skulle vilja prata med någon om akademiskt skrivande, studieteknik eller muntliga presentationer – boka en tid hos Studieverkst

https://www.psy.lu.se/sites/psy.lu.se/files/info_stu_20min.pdf - 2026-05-24