A5101888236- Advanced Combustion Engine Technologies
- Vehicle emissions and performance
- Combustion and flame dynamics
- Combustion and Detonation Processes
- Biodiesel Production and Applications
- Catalytic Processes in Materials Science
- Refrigeration and Air Conditioning Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Rocket and propulsion systems research
- Advanced Thermodynamic Systems and Engines
- Geothermal Energy Systems and Applications
- Mass Spectrometry Techniques and Applications
- Heat transfer and supercritical fluids
- Turbomachinery Performance and Optimization
- Sensor Technology and Measurement Systems
- Architecture and Computational Design
- Integrated Energy Systems Optimization
- Heat Transfer and Numerical Methods
- CO2 Sequestration and Geologic Interactions
- Engine and Fuel Emissions
- Technical Engine Diagnostics and Monitoring
- Electric and Hybrid Vehicle Technologies
- Advanced Sensor Technologies Research
- Tribology and Lubrication Engineering
Czech Technical University in Prague
2009-2023
University of Chemistry and Technology, Prague
2023
University of Michigan
2011
An experimental study is performed for homogeneous charge compression ignition (HCCI) combustion focusing on late phasing conditions with high cyclic variability (CV) approaching misfire. High CV limits the feasible operating range and objective to understand quantify dominating effects of in order enable controls widening HCCI. A analysis method developed explaining dynamic coupling sequences cycles where important variables are residual gas temperature, efficiency, heat release during...
Increased residual levels in homogeneous charge compression ignition (HCCI) engines employing valve strategies such as recompression or negative overlap (NVO) imply that accurate estimation of gas fraction (RGF) is critical for cylinder pressure heat release analysis. The objective the present work was to evaluate three methods and assess their suitability under naturally aspirated boosted HCCI operating conditions: (i) simple state equation method employs ideal law at exhaust closing (EVC);...
Homogeneous charge compression ignition (HCCI) has the potential to reduce both fuel consumption and NOx emissions compared normal spark-ignited (SI) combustion. For a relatively low ratio engine, high unburned temperatures are needed initiate HCCI combustion, which is achieved with large amounts of internal residual or by heating intake charge. The amount in combustion chamber controlled recompression valve strategy, relies on negative overlap (NVO) trap gases cylinder. A single-cylinder...
Homogeneous charge compression ignition (HCCI) offers great potential for improved fuel economy and dramatically reduced NOx emissions, compared to typical spark (SI) combustion. However, the benefits of HCCI are limited low medium loads by simultaneous occurrence combustion instability knock at a maximum load that is too conventional SI To provide smooth operation in intermediate range between requires alternative strategies. One such strategy spark-assisted (SACI), which uses plug initiate...
This work presents an experimental investigation of advanced combustion extremely lean natural gas / air mixture in a fueled automotive engine with scavenged pre-chamber. The pre-chamber, which was designed and manufactured in-house, is installed into modified cylinder head for light duty truck. For initial pre-chamber ignition tests optimizations, the single one. equipped spark plug, fuel supply miniature pressure transducer. arrangement allows simultaneous crank angle resolved measurement...
Shrnutí Článek se zaměřuje na popis termodynamiky reálného Stirlingova motoru pro stacionární výrobu elektrické energie a tepla z obnovitelných zdrojů. Byly zaznamenány úhlově indexované - v závislosti natočení klikového hřídele záznamy rychle proměnných tlaků ve studeném horkém válci nad písty prostoru pod při různém zatížení. Měření byla uskutečněna vývojové zkušebně výrobce motorů. Tlakové průběhy byly analyzovány pomocí softwarových nástrojů vyvinutých univerzitě. dále popisuje nástroje...
Engine induced swirl improves mixing of fuel and air at optimal values accelerates burn, the combustion stability can decrease particulate matter (PM). However, increases convective heat loss cylinder charge could increase nitrogen oxides (NOx) emissions. High intensity impede flame development emissions total hydrocarbons (THC) carbon monoxide (CO). Therefore, careful smart selection is paramount in order to obtain beneficial impact on performance. This study conducted a 0.5L single...
Homogeneous charge compression ignition (HCCI) has the potential to reduce both fuel consumption and NOx emissons compared normal spark-ignited (SI) combustion. For a relatively low ratio engine, high unburned temperatures are needed initiate HCCI combustion, which is achieved with large amounts of internal residual or by heating intake charge. The amount in combustion chamber controlled recompression valve strategy, relies on negative overlap (NVO) trap gases cylinder. A single-cylinder...
Homogeneous charge compression ignition (HCCI) offers great potential for improved fuel economy and dramatically reduced NOx emissions, compared to typical spark (SI) combustion. However the benefits of HCCI are limited low medium loads by simultaneous occurrence combustion instability knock at a maximum load that is too conventional SI To provide smooth operation in intermediate range between requires alternative strategies. One such strategy spark-assisted (SACI) which uses plug initiate...
In this study the results of a detailed thermodynamic investigation real Stirling engine are presented. A combined experimental and simulation approach was applied. 1-D model built calibrated to match data. The data were collected on prototype at manufacturer’s test laboratory. set calibration parameters included energy balance inputs outputs in form integral crank angle based pressure from working volumes engine. Unconventional acquisition analysis developed due specific nature procedure...
Shrnutí V článku je prezentován výsledek experimentálního průzkumu spalování zředěné směsi zemního plynu se vzduchem při nízkém zatížení zážehového motoru. Zředění a recirkulujícími spalinami bylo porovnáno s provozem na stechiometrickou směs. Byla provedená detailní termodynamická analýza záznamu průběhu tlaku ve válci byl vyhodnocen analyzován průběh hoření. Výsledky naznačují potenciál ke zlepšení účinnosti motoru současně možnost významného snížení emise NO X v surových spalinách...