1-WP03-012 ZV: Optimized advanced pre-chamber design

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00365015" target="_blank" >RIV/68407700:21220/22:00365015 - 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

1-WP03-012 ZV: Optimized advanced pre-chamber design

Popis výsledku v původním jazyce

Optimized un-conventional active pre-chamber design and operation under low-carbon fuel operation (CNG, LNG). Its performance will be verified experimentally on a research ICE. The VarioTec (VaT) ignition chamber (IC) was installed for tests on a single cylinder engine 102/120 mm. In the first experimental campaign the effective scavenging of IC by air was tested successfully. Modification for the use of the series production spark plug is now in progress. IC design optimization was performed using CFD. For that purpose, three types of modelling were utilized. - Detailed 1-D CFD model of target ICE – optimization of layout and IC and boundary conditions (BC) for 3-D CFD. - Detailed 3-D CFD model of combustion chamber and intake/exhaust ports including advanced pre-chamber (5 consecutive cycles modeled to verify ICE performance). - Simplified 3-D CFD model (compression stroke and combustion phase only) for sensitivity studies and optimizations: Pre-chamber size, shape and space– this includes spark plug position and fuel nozzle size and space direction was investigated. Connecting channels (between pre-chamber and main combustion chamber) were optimized.

Název v anglickém jazyce

1-WP03-012 ZV: Optimized advanced pre-chamber design

Popis výsledku anglicky

Optimized un-conventional active pre-chamber design and operation under low-carbon fuel operation (CNG, LNG). Its performance will be verified experimentally on a research ICE. The VarioTec (VaT) ignition chamber (IC) was installed for tests on a single cylinder engine 102/120 mm. In the first experimental campaign the effective scavenging of IC by air was tested successfully. Modification for the use of the series production spark plug is now in progress. IC design optimization was performed using CFD. For that purpose, three types of modelling were utilized. - Detailed 1-D CFD model of target ICE – optimization of layout and IC and boundary conditions (BC) for 3-D CFD. - Detailed 3-D CFD model of combustion chamber and intake/exhaust ports including advanced pre-chamber (5 consecutive cycles modeled to verify ICE performance). - Simplified 3-D CFD model (compression stroke and combustion phase only) for sensitivity studies and optimizations: Pre-chamber size, shape and space– this includes spark plug position and fuel nozzle size and space direction was investigated. Connecting channels (between pre-chamber and main combustion chamber) were optimized.

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

2022

Kód důvěrnosti údajů

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

Interní identifikační kód produktu

TN01000026/1-V31

Číselná identifikace

1-WP03-012 ZV

Technické parametry

Experiments carried out on engine test bed in 2022 show. VaT ignition chamber (IC) shows operability up to lambda = approx. 1.7, NOx emissions in raw exhaust gas are very close to a legislative limit, HC emissions issue remains – need for further improvement and oxidation catalyst. A slower late phase of combustion at lambda close to 1 also needs to be addressed in the future. Detailed 3-D CFD simulations were performed to find optimal thermodynamic design of combustion chamber with focus on fast combustion process. This includes active air scavenging and active gaseous fuel injection. Simplified optimizations/sensitivity studies were carried out to evaluate influence of different design and operational parameters (e.g., fuel injection timing, injected fuel amount/pressure, spark plug position, fuel injector position/shape, size/configuration of connecting channels). Complex automated optimization procedure/methodology was proposed (and put in operation).

Ekonomické parametry

An advanced combustion system for ICEs with active P-C enables partial or complete transition to low carbon fuels and H2, significant improvement in engine efficiency, very near zero tail-pipe emissions, maintaining usability, well proven production technologies and minimizing unwanted societal impacts.

Kategorie aplik. výsledku dle nákladů

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IČO vlastníka výsledku

68407700

Název vlastníka

České vysoké učení technické v Praze / FS / centrum vozidel udržitelné mobility Josefa Božka

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