Optimized gas ICE for vehicle decarbonization

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00364994" target="_blank" >RIV/68407700:21220/22:00364994 - isvavai.cz</a>

Result on the web

<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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Result language

angličtina

Original language name

Optimized gas ICE for vehicle decarbonization

Original language description

An experimental single cylinder engine (ŠKODA AUTO 74.5mm bore) with the implementation of active pre-chamber (P-C) was commissioned in 2021 and experimental optimizations with multiple variants were performed in 2022. A new cylinder head was designed and manufactured by ŠKODA AUTO. The assembled cylinder head was delivered for functional tests in the CTU test stand in 2021. It is equipped with an actively scavenged pre-chamber. A standard spark plug with M12x1.25 thread was centrally mounted in the pre-chamber. The pre-chamber is actively cooled by the engine coolant for reduced thermal stress and a safe operation even at high load. An initial design of the side mounted fuel supply line with a miniature ball check valve was adopted with modifications from the G432 engine from previous projects. A new 2022 design of the fuel delivery the check valve and solenoid injector was experimentally validated. This solution enables more precise fuel flow metering and control of charge mixing in the prechamber. The bottom part of the P-C was manufactured in two material variants. The first one, made of stainless steel to ensure high reliability at high temperature. The second one made of copper alloy with high thermal conductivity to improve cooling. Moreover, a new variant, geometrically optimized for a pent roof combustion chamber was manufactured and tested in 2022.

Czech name

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Czech description

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Type

G_funk - Functional sample

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/TN01000026" target="_blank" >TN01000026: Josef Bozek National Center of Competence for Surface Vehicles</a><br>

Continuities

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

Publication year

2022

Confidentiality

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

Internal product ID

TN01000026/1-V30,1-WP03-011 ZV

Numerical identification

TN01000026/1-V8

Technical parameters

Experiments carried out in 2022 show: In mid load conditions for CNG fuel: Approximately 11% specific energy consumption (ISEC) reduction for lean (λ >> 1.0) conditions compared to lambda = 1 for the best variant can be reached. The NOx emissions below 500 ppm at λ >= 1.4 (applicable to other synthetic fuels). Lean NOx aftertreatment is applicable with reduced demands for its efficiency (diesel engine lean NOx aftertreatment can be adopted here). The levels of CH4 show that the oxidation catalyst is desirable. In full load conditions for CNG fuel: Approximately, 6% of ISEC reduction compared to lambda = 1 operation is reachable with the similar results in terms of the NOx and CH4 emissions as in the mid load operation. For H2 fueled ICE variants at mid engine load: The NOx emissions drop below 10ppm for λ>2.4 for all tested variants. The ISEC can be reduced to 8.3 MJ/kWh, that corresponds to the indicated efficiency of 43%.

Economical parameters

The results indicate the potential of H2ICEs to decarbonize transportation and to further decrease vehicle fuel (energy) consumption while maintaining ultra-low pollutant emissions, an acceptable range. They could generate a net reduction in CO2 emissions, helping to meet CO2 targets more rapidly and at lower net societal cost. The proposed strategy can contribute to smoothing the transient to carbon free economy, enabling effective building of the hydrogen infrastructure.

Application category by cost

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Owner IČO

68407700

Owner name

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

Owner country

CZ - CZECH REPUBLIC

Usage type

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

Licence fee requirement

A - Poskytovatel licence na výsledek požaduje licenční poplatek

Web page

http://147.32.168.15:8080