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

Result code in 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>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

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

2020

Confidentiality

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