Combustion system for a non-conventional piston engine

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00349118" target="_blank" >RIV/68407700:21220/20:00349118 - isvavai.cz</a>

Výsledek na webu

<a href="http://147.32.168.15:8080" target="_blank" >http://147.32.168.15:8080</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Combustion system for a non-conventional piston engine

Popis výsledku v původním jazyce

The main outcome is an advanced combustion system based on a scavenged pre-chamber (P-C) for a fast and stable combustion of extremely lean homogeneous mixtures. Non conventional manufacturing methods to achieve high ignition system performance and challenging packaging into a limited space in the cylinder head are considered. Test samples of the 3D metal parts were printed and flow characteristics of various rounded channels have been measured in the CTU laboratory with successful results. A new scavenged P-C layout was designed and it was simulated in a 3-D CFD to verify its functionality and compared with the base design. Two closed loop CAD and CFD optimization iterations have been performed. The new P-C design contains: A new shape and size of the P-C, optimized orientation of the scavenging ports for mixture homogenization, optimized position of spark electrodes, optimized shape, size and number of connecting channels between the P-C and the main combustion chamber The activities in 2020 focused on the design of the VarioTec combustion system and its optimization using 3-D CFD simulations. The best variant was selected and manufactured by the advanced 3-D printing technology. Due to very limited space, a special spark plug was developed in cooperation with Brisk Tabor a.s. The VarioTec combustion system was installed in a modified cylinder head AVIA.

Název v anglickém jazyce

Combustion system for a non-conventional piston engine

Popis výsledku anglicky

The main outcome is an advanced combustion system based on a scavenged pre-chamber (P-C) for a fast and stable combustion of extremely lean homogeneous mixtures. Non conventional manufacturing methods to achieve high ignition system performance and challenging packaging into a limited space in the cylinder head are considered. Test samples of the 3D metal parts were printed and flow characteristics of various rounded channels have been measured in the CTU laboratory with successful results. A new scavenged P-C layout was designed and it was simulated in a 3-D CFD to verify its functionality and compared with the base design. Two closed loop CAD and CFD optimization iterations have been performed. The new P-C design contains: A new shape and size of the P-C, optimized orientation of the scavenging ports for mixture homogenization, optimized position of spark electrodes, optimized shape, size and number of connecting channels between the P-C and the main combustion chamber The activities in 2020 focused on the design of the VarioTec combustion system and its optimization using 3-D CFD simulations. The best variant was selected and manufactured by the advanced 3-D printing technology. Due to very limited space, a special spark plug was developed in cooperation with Brisk Tabor a.s. The VarioTec combustion system was installed in a modified cylinder head AVIA.

Druh

G_funk - Funkční vzorek

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/TN01000026" target="_blank" >TN01000026: Národní centrum kompetence Josefa Božka pro pozemní dopravní prostředky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Interní identifikační kód produktu

1-WP-03-003

Číselná identifikace

TN01000026/1-V9

Technické parametry

The volume of the chamber – optimized by the CFD to the value of 3800 mm3. Radial direction of orifices, area and diameter of orifices - optimized by the CFD: 25 holes, d = 0,5 , 0,6, 0,7 mm. Effective scavenging by air - optimized by the CFD. Potential expected reduction in tailpipe CO2 emissions will be within the range of 7 to 98%. Gradual improvement in environmental parameters will be controlled by accessibility of the carbonless fuel. The technical description is available under direct access to ISTA or via X Wiki at CTU in Prague as OntoDASY II at http://147.32.168.15:8080. X Wiki based OntoDASY II is better structured and contains all public opened enclosures. Ask access rights at Jan.Macek@fs.cvut.cz.

Ekonomické parametry

The combustion system will be optimized in detail. In the next stage a multicylinder engine with thiscombustion system will be tested. According to the results of the testing, the system will beimplemented in non-road application. (e.g. ships, locomotives and cogeneration plants). The university will use the aquired results for the further research projects and educational activities.

Kategorie aplik. výsledku dle nákladů

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IČO vlastníka výsledku

68407700

Název vlastníka

České vysoké učení technické v Praze

Stát vlastníka

CZ - Česká republika

Druh možnosti využití

A - K využití výsledku jiným subjektem je vždy nutné nabytí licence

Požadavek na licenční poplatek

A - Poskytovatel licence na výsledek požaduje licenční poplatek

Adresa www stránky s výsledkem

http://147.32.168.15:8080