The Digital Twin Spark Ignition Technology Essay Example

to expand like an inflating balloon.

When there is a sufficient or heavy load on the engine, the 4 - stroke cycle completes at a faster rate resulting in the faster combustion because of the twin sparks produced by the twin plugs. But when there exists a lighter load on the engine, the 4 - stroke cycle will not complete at a faster rate. Therefore even the incorporation of twin spark plugs cannot aid the faster combustion I. E. Till a better rate of combustion can be achieved at lighter loads.

Combustion efficiency in lean Airfield mixture conditions can be further improved by generating high turbulence in the having low turbulence give rise to propagation of a flame front, which is akin to that of a gradually expanding balloon. This results in a slower rate of combustion and thus slower rate of pressure rise. End result is lower efficiency. When high turbulence is generated and combustion takes place, the surface of the ballooning flame front fragments itself, with projection like fingers, which increases its surface area, thereby improving combustion further.

Here comes the Swirl Induction concept, which is meant for producing higher turbulence in the combustion chamber. Swirl Induction is nothing but imparting a swirling motion to the fresh charge that enters the combustion chamber. This can be done by making slight modifications in the positioning of the ports of engine. The actual DOTS-Is technology: Fig showing both DOTS-I & DOTS-Is engines The DOTS-Is engine will have two spark plugs but it differs from the parent DOTS-I engine in the design of position of the ports.

The straight ports used in conventional engines have limitations

in enervating high swirl values due to their geometry. One of the ways to generate more swirl is to have a port configuration that promotes this phenomena. An offset port configuration was arrived upon and optimized to generate the required swirl numbers. Incorporated in the new engine, this results in a swirling motion of the incoming charge, which decays itself into turbulence as the piston moves in the Induction and Compression strokes.

This results in the Air-Fuel mixture being more thoroughly mixed and spread around the combustion chamber. Sparks provided by the twin spark plugs ignite this highly turbulent and rent with high surface area, resulting in a rapid rise of pressure due to rapid combustion. The values of turbulence achieved now, are substantially higher than that of a straight port cylinder head, such as in DOTS-I. A combination of DOTS-I and Swirl induction thus provides extremely rapid combustion, resulting in high efficiency.