Description of the functional sample 1-WP03-003 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%3A00349263" target="_blank" >RIV/68407700:21220/20:00349263 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Description of the functional sample 1-WP03-003 Combustion system for a non-conventional piston engine

Popis výsledku v původním jazyce

Main goal of this work package is a research and development of an advanced combustion system with a scavenged pre-chamber for fast and stable combustion of both extremely lean and stoichiometric mixtures. Together with two industrial partners, a new design of the scavenged pre-chamber of stoichiometric and extremely lean homogeneous mixtures is being developed for automotive gas engines and stationary gas engines for distributed power and heat generation. A unique engine control strategy, combining a lean operation at low load and stoichiometric operation at high and full load condition is being tested. Results of experiments show that the scavenged pre-chamber significantly expands the flammability limit compared to the conventional gas fueled SI engine. A low temperature combustion of extremely diluted charge enables to achieve high engine efficiency and low NOx emissions in raw exhaust gases and reduce the necessity of using a special NOx after-treatment. At full load conditions, the pre-chamber engine is able to operate with the stoichiometric mixture to achieve the highest possible power density. The stoichiometric operation is also compatible with a simple three-way catalyst. The proposed control strategy for the pre-chamber engine therefore implements the use of a combination of stoichiometric operation at high load and lean combustion concept in part and low load region. The work contains experimental mapping and optimization in steady state engine operation in selected points of the full performance map with stoichiometric and lean combustion. Tests with activated and de-activated scavenging of the pre-chamber were performed as well.

Název v anglickém jazyce

Description of the functional sample 1-WP03-003 Combustion system for a non-conventional piston engine

Popis výsledku anglicky

Main goal of this work package is a research and development of an advanced combustion system with a scavenged pre-chamber for fast and stable combustion of both extremely lean and stoichiometric mixtures. Together with two industrial partners, a new design of the scavenged pre-chamber of stoichiometric and extremely lean homogeneous mixtures is being developed for automotive gas engines and stationary gas engines for distributed power and heat generation. A unique engine control strategy, combining a lean operation at low load and stoichiometric operation at high and full load condition is being tested. Results of experiments show that the scavenged pre-chamber significantly expands the flammability limit compared to the conventional gas fueled SI engine. A low temperature combustion of extremely diluted charge enables to achieve high engine efficiency and low NOx emissions in raw exhaust gases and reduce the necessity of using a special NOx after-treatment. At full load conditions, the pre-chamber engine is able to operate with the stoichiometric mixture to achieve the highest possible power density. The stoichiometric operation is also compatible with a simple three-way catalyst. The proposed control strategy for the pre-chamber engine therefore implements the use of a combination of stoichiometric operation at high load and lean combustion concept in part and low load region. The work contains experimental mapping and optimization in steady state engine operation in selected points of the full performance map with stoichiometric and lean combustion. Tests with activated and de-activated scavenging of the pre-chamber were performed as well.

Druh

O - Ostatní výsledky

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