Gas Engine with Hydrogen Scavenged Pre-chamber

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00320452" target="_blank" >RIV/68407700:21220/17:00320452 - isvavai.cz</a>

Result on the web

<a href="http://www.smartcats.eu/3rd-general-meeting-and-workshop-on-secs-in-industry/#1489440793624-4c80de6d-1981" target="_blank" >http://www.smartcats.eu/3rd-general-meeting-and-workshop-on-secs-in-industry/#1489440793624-4c80de6d-1981</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Gas Engine with Hydrogen Scavenged Pre-chamber

Original language description

Extremely lean homogeneous mixture operation of spark ignition gas engine leads to a low temperature combustion and low heat losses as well as a low NOX formation. Lean mixture causes problems with initiation of combustion process. This can be improved by the use of scavenged pre-chamber ignition. At the spark discharge event the pre-chamber contains enriched mixture, which supports the start of combustion. Pre-chamber combustion generates amount of energy approximately one thousand times higher than the spark itself. Hot combustion products from the pre-chamber rapidly penetrate the main combustion chamber and help to ignite lean mixture in the main combustion chamber. In this way the engine can be operated with significantly leaner mixture than the conventional spark ignited one. This combustion strategy is well established in the field of stationary, large bore gas engines fueled with natural gas both as a main fuel supplied into the intake manifold and as a secondary fuel delivered into the pre-chamber. The authors work on a miniaturization of the pre-chamber structure to enable its implementation in automotive size engine. The engine with the pre-chamber fueled completely with natural gas shows at low load significant improvement of indicated efficiency compared to the original spark ignition engine and at the same time a very low content of nitrogen oxides in raw exhaust gas. Promising results were acquired on engine test bench in a steady state operation of the experimental single cylinder engine. Engine efficiency was improved additionally when the pre-chamber was scavenged and filled with hydrogen, still maintaining the low NOx content in raw exhaust gas, which is the main outcome of this work.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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