Bajaj's new 125 cc 'Exceed' to hit roads in Sept

Update:-
Bajaj sold 65000 XCDs in 50 days.



Bajaj has come up with yet another innovation for ppl who actually care for millage:-

PUNE: Bajaj Auto on Thursday announced a breakthrough with the launch of a new engine for its new two-wheeler range which the company claims gives a mileage of 109 km per litre under ideal test conditions.

The company will launch a new model `Exceed', powered by the new engine, in September, Bajaj Auto Managing Director Rajeev Bajaj told reporters on Thursday.

`Exceed' is expected to be priced at Rs 40,000 ex-showroom (Pune) but the actual pricing will be decided later, Bajaj said.
The new engine called Digital Twin Spark--Swirl induction (DTS-Si) surpasses the mileage offered by all current 100 cc motorcycles. The company has applied for a patent for this engine, Bajaj said.

The breakthrough offers a huge opportunity to upgrade the 100 cc customers with an engine which offers the best of both worlds--100 cc mileage and 125 cc performance, top officials of the company said.

The DTS-Si engine is far superior to the conventional 4-stroke engines which dominate the 100 cc segment at present, the said.

General Manager, Marketing, Amit Nandi said brand Bajaj enjoys a market share of 47 per cent in the growing and profitable 125 cc and 150 cc segments against a smaller share of 24 per cent in the declining but larger 100 cc segment.

Bajaj will offer customers a value proposition much superior to the currently over-priced and under performing 100 cc products with the launch of `Exceed' next month, he said. 100 cc customers will upgrade to this 125 cc bike that gives superior mileage and power, he said.

Read the article on Economic times

Engine Details from Bajaj:-
DTS-Si (DIGITAL TWIN SPARK - SWIRL induction)


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

Digital Twin Spark ignition (DTS-i system)

The Digital Twin Spark – ignition, equipped combustion chamber takes care of the slow rate of combustion in a simple but novel way. The cylinder head is equipped with two spark plugs, instead of the conventional single spark plug. By generating two sparks at either ends of the combustion chamber, (approximately 90 to the valve axis) the Air-Fuel mixture gets ignited such that, there are 2 flame fronts created and therefore a reduction in flame travel of the order of 40% is achieved. A fast rate of combustion is achieved leading to a fast rate of pressure rise. The obvious outcome of this is more torque, better fuel efficiency and lower emissions.

Digital Twin Spark – Swirl induction (DTS-Si system)

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

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

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

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

Combustion chambers 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.

The straight ports used in conventional engines have limitations in generating 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 optimised 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 compressed Air-Fuel mixture, leading to a flame front 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 Pulsar. A combination of DTS-i and Swirl induction thus provides extremely rapid combustion, resulting in high efficiency.

Update:- The real fuel efficiency (average / millage) as offered by xcd is as follows:-

(highway / city / overall) kmpl
65.3 / 73.6 / 71.52

Note:-
Before you call this bullshit and ask how can xcd return better average in city than on highway, let me clarify. The xcd is most fuel efficient in the range of 40 to 45 (as per the mag) and the fuel efficiency of xcd drops above 60. 90 being the top speed. Now the question is can you ride a bike in any city forget the metros, at a constant speed of 40 ??


Engine specification
Type: Four stroke Natural Air-cooled
No. of cylinders : One
Bore: 54 mm
Stroke: 54.4 mm
Engine displacement : 124.58 cc
Compression ratio: 9.5+/- 0.5 : 1
Maximum Net Power: 9.53 PS( 7.01 kW) at 7000 rpm
Maximum Net Torque: 10.85 Nm at 5000rpm
Ignition system: Microprocessor controlled Digital CDI, with TRICS incorporated in Carburettor
Ignition Timing: Variable Timing with Multiple maps
Fuel: Unleaded Petrol, 87 RON minimum
Carburetor: Side draught type,
Ucal – Mikuni VM16 with Auto choke/ Keihin FIE PTE16, with Auto choke
Lubrication: Wet sump, forced
Clutch: Wet, mulit disc type.
Bajaj xcd