Bajaj Auto unveils revolutionary DTS-Si engine

18 Апр 2015 | Author: | Комментарии к записи Bajaj Auto unveils revolutionary DTS-Si engine отключены
Bajaj XCD 125 DTS - Si

Bajaj Auto unveils DTS-Si engine

•All new offers 100cc Mileage and Performance

•All new engine ‘swirl induction’ technology

that will catalyse of 100cc customers to superior bike

Pune, 9thAugust Bajaj Auto, has achieved breakthrough with the launch of new Twin Spark – Swirl (DTS-Si) engine. The new 125cc with DTS-Si technology give an amazing mileage of 109 per liter under ideal conditions surpassing the mileage of all 100cc motorcycles. With breakthrough there is a huge and opportunity to upgrade the 100cc with a engine which the best of both worlds – mileage and 125cc performance.

and developed completely by ‘**Ahead’, Auto’s RD, the technology promises to the industry with India’s fuel-efficient two-wheeler engine. Auto presented the DTS-Si at their Corporate Headquarters in today.

Bajaj had first improved on existing engine in 2003 when it launched the (Digital Twin Spark-ignition) with two Spark plugs at opposite ends of the combustion (as compared to a single spark in conventional 4-… engines) to faster and more efficient The DTS-i technology offered performance, improved fuel with lower emissions and establish the Bajaj Pulsar and the Bajaj Discover as leaders in respective segments.

The DTS-i Engine can be further to deliver either exceptional or exceptional mileage. Bajaj worked on the mother DTS-i to design the DTS-Si engine to outstanding mileage.  The DTS-Si gives the highest possible efficiency by introducing ‘Swirl to the DTS-i engine to create in order to achieve extremely combustion.

The DTS-Si engine is far to the conventional 4-… engines, dominate the 100cc segment at With the new DTS-Si engine the now would not have to compromise power and mileage – he gets the of both.

Says Mr. Abraham Head of RD, Bajaj Auto “We realized that at light on DTS-i, an opportunity existed to the combustion even further. burning lean Air-Fuel through the two spark plugs, the conditions could be further by generating high turbulence in the chamber. Once the solution was at, the design and geometry modifications

Bajaj enjoys a market of 47% percent in the growing and profitable 125 cc and 150 cc as against a smaller share of 24% in the declining but larger 100 cc segment. Mr. Amit Nandi, General (Marketing), “Bajaj will customers a value proposition superior to the currently overpriced and 100cc products with the of an all new bike with the DTS-Si next month. 100cc will upgrade to this bike that gives mileage and superior power.”

The product, which will be by this engine, would be in September 2007.

BAJAJ  125 ENGINE Specifications

Type   : Four Natural Air-cooled

No. of cylinders : One


Stroke   : 54.4 mm

Engine displacement : cc

Compression ratio : 9.5+/- 0.5. 1

Net Power : 9.53 PS( 7.01 kW) at 7000 rpm

Maximum Net Torque : 10.85 Nm at 5000rpm

system  : Microprocessor controlled Digital with TRICS incorporated in

Ignition Timing  : Variable Timing Multiple maps

Lubrication  : Wet forced

Clutch   : Wet, mulit type.



In a conventional single plug equipped combustion the rate of combustion is slow. The plug situated at one end of the combustion ignites the air-fuel mixture and the flame front spreads a slowly inflating balloon. is an inevitable delay for this balloon to reach the furthest of the combustion chamber.

Thus, the is slow and inefficient.

Bajaj XCD 125 DTS - Si

Digital Spark ignition (DTS-i

The Digital Twin Spark – equipped combustion chamber care of the slow rate of in a simple but novel way. The head is equipped with two plugs, instead of the conventional spark plug. By generating two at either ends of the combustion (approximately 90 to the valve axis) the mixture gets ignited that, there are 2 flame created and therefore a reduction in travel of the order of 40% is achieved.

A fast rate of combustion is leading to a fast rate of rise. The obvious outcome of is more torque, better efficiency and lower emissions.

Twin Spark – Swirl (DTS-Si system)

The Digital Spark – ignition or DTS- i is the technology for the latest Digital Spark – Swirl induction or technology.

Thanks to DTS- i, a rate of combustion and therefore the fast rate of pressure is harnessed, by optimally positioning pressure, to deliver maximum work and hence obtain torque, better fuel and lower emissions.

When lean Air-Fuel mixtures, the two provide rapid combustion, but at loads, opportunity exists to the combustion further.

Combustion in lean Air-Fuel mixture can be further improved by generating turbulence in the combustion chamber.

Combustion chambers having low give rise to propagation of a front, which is akin to of a gradually expanding balloon. results in a slower rate of and thus slower rate of rise. End result is lower

When high turbulence is and combustion takes place, the of the ballooning flame front itself, with projection fingers, which increases its area, thereby improving further.

The straight ports in conventional engines have in generating high swirl due to their geometry. One of the ways to more swirl is to have a configuration that promotes phenomena. An offset port was arrived upon and optimised to the required swirl numbers.

in the new engine, this results in a motion of the incoming charge, decays itself into as the piston moves in the Induction and strokes. This results in the mixture being more mixed and spread around the chamber.

Sparks provided by the twin plugs ignite this turbulent and compressed Air-Fuel leading to a flame front high surface area, in a rapid rise of pressure due to combustion. The values of turbulence now, are substantially higher that of a straight port head, such as in Pulsar. A of DTS-i and Swirl induction provides extremely rapid resulting in high efficiency.


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Bajaj XCD 125 DTS - Si
Bajaj XCD 125 DTS - Si


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