Turbo fuel stratified injection (TFSI)

Audi was the first manufacturer to combine petrol direct injection with the turbocharger in large scale production. The 2.0 TFSI started its success story in the summer of 2004 making its debut in Audi A3 sport.

Turbo fuel stratified injection denotes a type of forced aspiration engine where the fuel is pressure injected straight into the combustion chamber in such a way to create stratified charge. A stratified engine is type of IC engine, in which fuel is injected to the cylinder just before ignition to allow higher compression ratio.

   

Compare to conventional V6 naturally aspirated engines the super charge 4 cylinder unit direct injection saves 10-15% of power to the same performance values. FSI technology therefore compliments turbocharging excellently, because the evaporation of the fuel in the combustion chamber directly removes heat from the fresh air drawn in. This allows an increase in compression and clearly improves the efficiency also it solves the old problem of Turbo engines i.e. the strong inclination to knock at high degrees of supercharging.

The integrated manifold exhaust gas turbo charger module ensures optimum efficiency of the turbine and therefore utilization of exhaust energy. This means high performance and optimum response can be achieved in equal measure. Ultimately this helps to reduce fuel consumption and exhaust emissions effectively. In combination with the turbocharger FSI technology has superior potential and more performance in dynamic at lower consumption.

Adaptive suspension

Adaptive suspension

It allows engineer to monitor around 900 parameters of the vehicle relationship with road and gravity. For this there are four major technology

Active pneumo hydraulic

This system uses combination of pump and accumulators to move hydraulic fluid and compress nitrogen gas to the cars four corner as needed in millisecond to take over the function of both shock absorber and sway control. It’s very exotic and expensive. Used in Mc laren mp4 12C.

Active Electromagnetic

This system replaces all those pneumo hydraulic pluming and pumping with linear electromagnetic motor at each corner. Its response can be even faster. It actually derives from study of waves and electromagnetics.

Now adaptive or semi active. It is so called because all they do is react to what road and car is doing instead of bringing their own forces to that relationship.

Adaptive solenoid

A typical shock works by passing hydraulic fluid through series of small valves or orifices, which limit the fluid that can move back and forth. That limits the movement of shock and therefore up and down movement of car. Adaptive valve or solenoid tech gives you electronic control over those shock valves so the rate at which fluid moves around inside the shock can be changed.

Adaptive Magnetorheological

It’s the fastest growing adaptive suspension. This GM developed suspension uses special kind of shock fluid with particles suspended in it that react to electric current and makes the fluid more viscous. It affect the damping behaviour in several ways that can be changed very rapidly and with great range and just by varying the current you applied to fluid.