05-09-2012, 04:05 PM
DIGITAL TWIN SPARK – IGNITION & ITS ADVANCES
1DIGITAL TWIN SPARK.pdf (Size: 323 KB / Downloads: 572)
INTRODUCTION:
Before introduction of these technologies, the motorcycle market trend
is towards fuel efficient, small capacity motorbikes (usually 85cc- 110cc).
Bigger motorcycles with higher capacity virtually did not exist. The reason
behind this is the fuel consumption of these bigger or power bikes is very
high which is not at all acceptable by an average person in India. The
application of these technologies solved this problem by ensuring the
complete combustion of fuel in the combustion chamber and in turn fuel
efficiency.
THE ACTUAL PROBLEM WITH HIGHER CAPACITY BIKES:
The central problem in the higher capacity bikes is its higher capacity
(i.e. larger bore) it self. As the capacity is higher its intake of fresh charge
(air fuel mixture) will usually gets increases which in turn increases the fuel
consumption. And also the complete combustion of the fresh charge that
entered the combustion chamber is not assured, because initially the
capacity is higher, therefore the flame front of the spark ignited by the spark
plug has to travel the additional distance of increased bore in order to fire
the charge at the farthest corners of the cylinder thereby slackening the
combustion process.
There must be some modifications in the engine design to eliminate
these problems in higher capacity bikes. The application of Digital twin spark
ignition technology can eliminate this problem up to maximum extent.
COMBUSTION PROCESS BEFORE USING DTS-I TECHNOLOGY:
The orthodox single cylinder, four-stroke, spark ignition engine is
generally equipped with a single spark plug. The fresh charge (air – fuel
mixture) that entered the cylinder during the suction stroke is compressed
during the compression stroke resulting the increase of pressure and
temperature of the charge. The spark plug, usually situated at one end of the
combustion chamber, ignites the air-fuel mixture and the ensuing flame
spreads like a slowly inflating balloon. There is an inevitable delay for this
inflating balloon to reach the furthest part of the combustion chamber.
COMBUSTION PROCESS WITH DTS-I TECHNOLOGY:
The fresh charge that entered the cylinder during the suction stroke is
compressed during the compression stroke. Then a spark will be ignited by
one of the twin spark plugs and the flame front begins to expand like an
inflating balloon. In the mean while another spark will be ignited by another
spark plug as per controls of the microprocessor. The flame front also begins
to expand like an inflating balloon. Therefore the areas that are not covered
by the first flame front will be covered by second flame front resulting in the
complete & rapid combustion of the fuel.