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>> 11/August/2011 - Audi’s Newest Engine Reaches Innovative Heights

Audi is in the process of launching its new 1.8 TFSI engine. This new model showcases the company’s extent and development in motoring technology by building a more efficient and economical engine that doesn't compromise power.

Using a manual transmission the 1.8 TSFI can launch the Audi A5 Sportback from zero to 100km/h in 7.9 seconds pushing it towards an impressive top speed of 230km/h.

It also includes a high-end four cylinder that expels 1,798cm3 providing a powerful beefy 320 Nm to the crankshaft between 1,400 and 3,700rpm.

The 1.8 TFSI has a fuel consumption which rivals some hybrid models, averaging 5.7 litres per 100km. This model has fantastic omissions ratio of just 134 grams of CO2/km, achieving a massive 21% reduction when compared to its predecessor.

This is made possible by using both direct injection and indirect injection. Indirect injection is optimized in the part load range this reduces the ultimate fuel consumption as well as the particle emissions. This innovation has enabled the 1.8 TFSI to be compliant with the future Euro 6 standard, not in effect until 2015.

The Audi 1.8 TFSI also contains a fully electronic coolant regulation system. Utilising two fast switching, rotating cores are consolidated in a module and driven by an electronic motor via a screw drive, which in turn controls the flow of coolant.

The technology was used to help bring the motor oil up to an optimal operating temperature as quickly as possible after a cold start.

This is all made possible by keeping the coolant in the crankcase for decent amount of time, with the cabin heating running off a separate loop in the cylinder head. The radiator then comes in to effect later, dissipating excess heat into the environment all at the very last moment.

Audi have also created a new turbocharger for the new 1.8 TFSI. Key features of the new design is a turbine wheel that is constructed from a new alloy that can withstand the exhaust temperatures of up to 980 degrees Celsius, a pulsation damper, a compressor wheel machined from a solid blank.

With an oxygen sensor mounted directly upstream from the turbine wheel and an electric wastegate actuator that adjusts the boost pressure incredibly quickly and utterly precisely, the new design allows for far better fuel consumption.

Along with an engine weight reduction, from 135 to 131.5kg, the new TFSI now has pistons built from a new high strength alloy and light-weight polymers which are used for the oil pans. Quite a number of screws within the engine are made from aluminium, contributing to the loss of weight.

Finally some internal friction has been drastically reduced using an innovative coating on the piston skirts, assisted by place two balance shafts, counteracting the second inertial forces in roller bearings.

Audi is clearly stepping up its innovation regarding more efficient and economical technologies when it comes to their vehicles. The TFSI will be arriving on our shores in first half of 2012.

It will be featured within the Audi A5 Sportback.

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