An Investigation on The Emissions in a Torch Chamber S.I.E. (Dept.M)

Experimental and theoretical investigations were made a torch chamber spark ignition engine to determine the effect of some design and operational parameters on engine emissions. The experimental study was performed using a modified Deutz-Diesel engine developed to be a torch chamber spark ignition engine. During this investigation, two main design parameters were investigated namely, the connecting passage shape and the flame initiation point. In this work three ignition point location and two different connecting passage shapes were investigated over a wide range of mixture strength, engine speed and throttle opening. A mathematical model of compression, combustion and expansion processes of the torch chamber spark ignition engine has also been developed. This model aims at estimating the effect of mixture strength on the NO and CO rates of formation in this engine. In developing the model, experimental data obtained on the same engine are used. The experimental results reveal that, the configuration of the connecting passage has a great effect on emissions from the torch chamber S.I.E. It also reveals that, as the spark plug is extended inside the combustion chamber, engine emissions decrease. The optimum case is reached when using a convergent divergent passage coupled with the extended spark plug. The trends obtained from the mathematical simulation are in a good agreement with the experimental one.