Guys, we are familiar with the word DTSI.But most of us don't know about what it means.The Indian bike manufacturer Bajaj has succesfully launched PULSAR series bikes which changed the bike concept in the roads.http://adf.ly/4213010/dtsiengine02The digital twin spark technology(DTSI) was famous in the bike concept.This review is shared to you to know about this engine and to know about various aspects of this engine.So read carefully to know the techniques adopted in the working procedue of DTSI engine.
 |
| PULSAR 180 DTSI ENGINE |
It is very interesting to know about complete combustion in automobile engineering, because in actual practice, perfect combustion is not at all possible due to various losses in the combustion chamber as well as design of the internal combustion engine. Moreover the process of burning of the fuel is also not instantaneous. However an alternate solution to it is by making the combustion of fuel as fast as possible. This can be done by using two spark plugs which spark alternatively at a certain time interval so as increase the diameter of the flame & burn the fuel instantaneously. This system is called DTSI (Digital Spark Ignition system). In this system, due to twin sparks, combustion will be complete.
This innovative solution, also entailing a special configuration of the
hemispherical combustion chambers and piston heads, ensures a fast,
wide flame front when the air-fuel mixture is ignited, and therefore less
ignition advance, enabling, moreover, relatively lean mixtures to be
used. This technology provides a combination of the light weight and
twice the power offered by two-stroke engines with a significant power
boost, i.e. a considerable "power-to-weight ratio" compared to quite a
few four-stroke engines.
http://adf.ly/4213010/dtsiengine-03This power unit, equipping the naturally aspirated 2-litre used on the Alfa 164, is a direct dilative of the engine fitted on the 2.0 Twin Spark version of the Alfa 75, a recent addition to the Alfa car range. It includes a number of exclusive engineering solutions resulting in superior power output and exceptional peak torque for this cylinder capacity. Its main characteristics are:
Twin overhead cams with camshaft timing variation
Injection fuel feed with integrated electronic twin spark ignition
Cylinder capacity amounts to 1,962 cc thanks to an 84 mm bore and 88.5 mm stroke with the Compression ratio 10: 1.Maximum power output at 5,800 rpm is a remarkable 148 BHP DIN, while maximum torque, of 19 mkg DIN, is reached at 4,000 rpm. The shape of the torque curve has been perfected to make available fully 16 mkg when revving speed reaches 2,000 rpm and 18 mkg as early as 3,000 rpm, thus making the engine's performance much more responsive.
ENGINE MADE
 |
| DTSI ENGINE PICTURE |
The engine used on the Alfa 164 T. Spark is a four-in-line cylinder unit whose weight has been considerably reduced with all aluminium-alloy engine block, cylinder head, oil sump and tappet covers.
Eight counterweights ensure optimal balancing of the high strength nitride steel crankshaft.
The pressed-in cast iron cylinder liners feature wet mounting for more effective heat dissipation.
FUEL EFFICIENCY
The Alfa 164 T. Spark power plant is equipped with the ML 4.1 Bosch Motronic multi-point injection system, controlled by the same microprocessor which governs the twin spark ignition and variable valve timing Systems.
The excellent volumetric efficiency of the Twin Spark engine is also enhanced by the special straight section individual intake man folding that cuts down losses and fully exploits intake resonance for better mid-range torque.
Having all thermodynamic cycle components under the wings of a single electronic control unit means that the power plant used on the Alfa 1 64 T. Spark can guarantee-in addition to outstanding torque and power figures-regular, smooth running at all speeds regardless of
load. Moreover, this engine features particularly attractive specific fuel economy compared with rival naturally aspirated units in the same displacement class.
WORKING
http://adf.ly/4213010/dtsi-engine-pic-01The working of DTS-i engine is very similar to 4-stroke engine but here the only modification done is we are using two spark plug at two ends of the combustion chamber. Which require less time to reach the farthest position of the combustion chamber and optimize the combustion chamber characteristics.
IGNITION
 |
| COMBUSTION PROCESS |
The ignition system on the Twin spark is a digital system with static spark advance and no moving parts subject to wear. It is mapped by the integrated digital electronic control box which also handles fuel injection and valve timing. It features two plugs per cylinder.
This innovative solution, also entailing a special configuration of the hemispherical combustion chambers and piston heads, ensures a fast, wide flame front when the air-fuel mixture is ignited, and therefore less ignition advance, enabling, moreover, relatively lean mixtures to be used.
ADVANTAGES OF USING DTSI ENGINE
Less vibrations and noise
Long life of the engine parts such as piston rings and valve stem.
Decrease in the specific fuel consumption
No over heating
Increase the Thermal Efficiency of the Engine & even bear high loads on it.
Better starting of engine even in winter season & cold climatic conditions or at very low temperatures because of increased Compression ratio.
Because of twin Sparks the diameter of the flame increases rapidly that would result in instantaneous burning of fuels. Thus force exerted on the piston would increase leading to better work output.
DISADVANTAGES OF USING DTSI ENGINE
There is high NOx emission
If one spark plug get damaged then we have to replace both
The cost is relatively more
You spend double the amount on spark plugs when it is time to replace them.
The engine tends to overheat and loose power at higher speeds as compared to a single plug engine.
In case the Engine is kept unused for a long time soiling of spark plugs occur. Twin Spark system helps to reduce this problem.
VERDICT
Hence it can be concluded that the application of these technologies in the present day automobiles will give the present generation what they want i.e. power bikes with fuel efficiency.http://adf.ly/4213010/engine-dtsi-valves Since these technologies also minimize the fuel consumption and harmful emission levels, they can also be considered as one of the solutions for increasing fuel costs and increasing effect of global warming.
NICE REVIEW WAS VERY USEFUL
ReplyDeletethanx for ur feeedback!!!
ReplyDeleteY mechanics say that dtsi engines have only life of 2-3years?
ReplyDeleteUr answer will be well appreciated!