Narrow-throat Pre-chamber Combustion with Ethanol, a Comparison with Methane King Abdullah Univ of Science and Tech

Format:

Book

Conference/Event

Author/Creator:

Almatrafi, Fahad, author.

Contributor:

Ben Houidi, Moez

Echeverri Marquez, Manuel

Hlaing, Ponnya

Johansson, Bengt

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

Pre-Chamber combustion systems are gaining popularity in Internal Combustion Engines (ICE) with the increasing emissions regulations due to their advantages in improving fuel economy by increasing the lean limit and cutting emission, especially NOx. In pre-chamber Combustion, flame jets shoot out from the pre-chamber orifices into the main chamber and generates several ignition points that promote a rapid burn rate of the lean mixture (air excess ratio (λ) >1) in the main chamber. This work focused on studying two different fuels in the main chamber, lean limit, combustion efficiency (η_c), and emissions. A single-cylinder heavy-duty engine equipped with a narrow throat pre-chamber was used. Two fuels were tested in the main chamber, Methane (CH4) and Ethanol (C2H5OH), the first fuel is used as a baseline, while keeping the pre-chamber fueled by Methane only. The engine was operated at a fixed speed, intake pressure, and spark-timing. The amount of fuel injected was varied to attain different global λ, then at each global λ; the amount of fuel injected to the Pre-chamber was varied to observe the effect of the pre-chamber λ. Different air intake temperatures were tested to see the effect on combustion efficiency. Results from the study showed an increase in the lean-limit using Ethanol in the main chamber compared to using only Methane in both chambers. However, lower η_c than that of the Methane was reported; this is due to the high heat of vaporization of Ethanol; η_c showed improvement when the air intake temperature increased

Notes:

Vendor supplied data

Publisher Number:

2020-01-2041

Access Restriction:

Restricted for use by site license