Direct injection of water mist in an intake manifold spark ignition engine

Abstract

The purpose of this study is to investigate the effects of water mist (WM) injected directly into an intake manifold spark ignition (SI) engine. WM flows through a nozzle at the throttle body of the four-cylinder four-stroke multi-point injection engine for testing the performance of exhaust emission system. The water is pumped in mist form into the intake manifold with an air-fuel mixture through the nozzle, which is located on the throttle body. Experimental work and simulation methods are combined by the presence and absence of WM addition, and the performance as well as emission produced by the engine is analyzed. The Gamma Technologies (GT) methods are used to simulate the model with and without WM addition. The experimental results indicate that the standard engine performance can be used to validate the simulation model. The engine measures include various parameters such as brake power, torque, volumetric efficiency, spark advance timing, and the concentration of CO and NOx with water and without water addition to the SI engine (i.e., the power, torque, volumetric efficiency of the engine is increased up to 10%). The emission of NOx is found to be significantly reduced and that of CO does not change.

Performance and emission characteristics of compression ignition engine using methyl ester blends of jatropha and fish oil

“…Augmented regulations on particulate matter and NOx, and also issues raised on greenhouse gas emission like CO2 are the reasons for demanding research work on bio-fuels all over the world [3][4][5][6]. Biodiesel derived from the trans-esterification of fats and oils [7][8][9][10][11] is a possible fuel for diesel engines. The properties of this fuel is comparable to that of diesel and can be used directly to run existing diesel engines or as a blend with crude oil diesel [12].…”

Effect of inlet air temperature on SI engine fueled with diethyl ether-gasoline blends

“…Further, the increase in CO is observed at maximum load condition. This is due to decrease in combustion temperature which leads to partial oxidation of CO to CO2 conversion process [27,29]. It is observed that when the load increased from 10% to 75 % the CO emissions are decreased for 3% DEE and 6% DEE blends respectively.…”

Single-zone zero-dimensional model study for diesel-fuelled homogeneous charge compression ignition (HCCI) engines using Cantera

“…The HCCI technique is the process by which a homogeneous mixture of air and fuel is compressed until auto-ignition occurs near the end of the compression stroke, followed by a combustion process that is significantly faster than either compression ignition (CI) or spark ignition (SI) combustion [11][12][13][14]. The air/fuel mixture quality in HCCI engines is generally lean, auto-ignites in multiple locations and is then burned volumetrically without discernible flame propagation [15][16][17][18].…”