Effect of relative humidity on water injection technique in downsized spark ignition engines
Artikel i vetenskaplig tidskrift, 2021
recently identified as a potential way of overcoming this barrier. To evaluate its general applicability, experiments were
performed on a downsized three-cylinder spark ignition engine, varying the humidity of the intake air, the water injection
timing, and the engine speed. The minimum quantity of injected water required to maintain a given load (and thus level
of engine performance) was determined under each set of tested conditions. The knock-suppressing effects of water
injection were found to be related to changes in the fuel–air mixture’s specific heat ratio (kappa) rather than evaporative
cooling, and to therefore depend on the total quantity of water in the cylinder rather than the relative humidity per se.
The total quantity of water in the cylinder was also shown to be a key determinant of advancement in combustion phasing
and particulate emissions under various conditions.
particulates
Water injection
water content
humidity
downsized spark ignition engine
Författare
Jayesh Khatri
Chalmers, Mekanik och maritima vetenskaper, Förbränning och framdrivningssystem
Nikhil Sharma
Chalmers, Mekanik och maritima vetenskaper, Förbränning och framdrivningssystem
Petter Dahlander
Chalmers, Mekanik och maritima vetenskaper, Förbränning och framdrivningssystem
Lucien Koopmans
Chalmers, Mekanik och maritima vetenskaper, Förbränning och framdrivningssystem
International Journal of Engine Research
1468-0874 (ISSN) 2041-3149 (eISSN)
Vol. 22 7 2119-2130Högeffektiv hybriddrivlina
Energimyndigheten (43325-1), 2016-12-01 -- 2019-12-31.
Ämneskategorier
Annan maskinteknik
Teknisk mekanik
Transportteknik och logistik
Styrkeområden
Transport
Infrastruktur
Chalmers strömningslaboratorium
DOI
10.1177/1468087420940854