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Suzuki’s new 1.2-litre dualjet engine explained

Snapshot: With emission norms becoming more and more strict, manufacturers are devising new ways to extract more efficiency from their engines by reducing the thermal losses and creating engine cylinders to burn fuel more efficiently..

With emission norms becoming more and more strict, manufacturers are devising new ways to extract more efficiency from their engines by reducing the thermal losses and creating engine cylinders to burn fuel more efficiently. 

Suzuki recently launched the swift with a new 1.2-litre dual-jet engine in the UK. It's a class leader when it comes to producing small capacity engines. They are economical to run, yet also deliver a decent load of exciting performance. With a promise to deliver 26.7kmpl, the new engine is talked to be 16% more efficient than its 1.2-litre K-series counterpart. So what is it that makes the new engine more fuel-efficient? 

The 1.2-litre dualjet engine comes with a slew of new technologies that work in sync to give better efficiency. To start with, the shape of the combustion chamber has been modified to create higher compression. The new engine now runs on a 12.0:1 compression ratios as compared to the previous 11.0:1 ratio. The higher compression enables more complete burning of the air-fuel mixture when the spark is applied, but at the same time emanates more heat due to the increase in pressure created within the combustion chamber. 

To protect the engine from overheating, the water-cooling jackets had to be modified and an exhaust gas recirculation (EGR) reworked to provide the necessary cooling. The addition of dual injectors placed closer to the inlet valves allows better fuel atomization resulting in lesser amounts of unburnt fuel to remain within the combustion chamber. To further aid fuel efficiency the new swift also comes with a start-stop system as well as brake energy regeneration technology. 

With these additions the efficiency has increased, although power has dropped slightly by 4PS to 90PS from the previous 94PS. The new 1.2-litre engine although being 500 British Pounds (Rs 50,000) more expensive than the standard 1.2 engine enjoys a complete exempt of excise duty by the UK government for producing 99g/km of CO2 emissions. 

With Maruti Suzuki India preparing to launch the new facelifted swift, it is mostly likely that it will come with the new engine. With afuel efficiency increase of 8kmpl over the standard 1.2-litre engine, it would make quite a bit of sense for people who still buy petrol cars in India. 

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