The TDI (Turbocharged Direct Injection) is a method of fuel delivery invented by the VW-Audi group. This method of fuel delivery allows the fuel to be directly injected to the main combustion chamber of each cylinder as apposed to a pre combustion chamber, used by indirect injection engines. Not all Diesel Engines are Turbocharged, most work by indirect injection which means that a pre combustion chamber is required. An indirect injection diesel engine is very similar to a standard petrol engine (because petrol engines also use indirect injection), which means a petrol and diesel version of the same car can be prodcued with minimal differences between the two. Indirect Injection Engines are also cheaper to produce which makes them very popular amongst car manufacturers.
Archive for April, 2010
By adding a turbocharger to your car, you can add a bhp increase of about 25%. It is possible to add more than one turbocharger which will see an even bigger increase in bhp. This is why 9 times out of 10 high perforamnce cars will be fitted with at least one turbocharger. The advantages of having a trubocharger are obviously that of increase power and easier to install than a supercharger. The disadvantages would be that they require cooling down after extended use (otherwise can get damaged and crack), lower fuel milage and you can damage your engine if you dont get it installed and tuned correctly because the ECU won’t be able to handle such a power increase. Turbochargers are popular amongst the VW-Audi group for their popular TDI range, such as the Audi TT tdi.
More on Turbochargers here.
There are many manufacturers of turbochargers, Holset is just one of them, but heres how they work: