Audi: New 2.8 V6 FSI engine

Here's another engine premiere by Audi from the Paris Motor Show.

Audi is continuing to extend its range of V6 petrol engines. The new 2.8-litre engine, which will be celebrating its debut in the Audi A6 towards the end of the year, delivers an output of 154 kW (210 bhp) and a peak torque of 280 Nm, available from engine speeds of 3,000 to 5,000 rpm. The new V6 operates with ultra-efficient FSI direct injection and furthermore introduces an entirely new valve control technology – the Audi valvelift system. This, together with the further reduced friction of all components, cuts fuel consumption by 10 percent.

Audi views the new valvelift system as a solution offering considerable future potential. Its simple, compact design allows a high degree of compatibility and makes it efficient to build, and the modular principle permits substantial synergy within petrol engine model ranges. Audi manufactures a large proportion of the components itself, at its plant at Gyцr in north-western Hungary, where the V engines are likewise built.

High peak output, beefy pulling power at mid-range engine speeds, low fuel consumption and refined running – these strengths typify all Audi V-engines. The new engine family, consisting of V6, V8 and V10 power units, was first unveiled in 2004. Its distinguishing technical features are a standard cylinder angle of 90 degrees, an internal calibre of 90 millimetres and timing-chain drive of the camshafts and auxiliaries mounted compactly on the rear of the engines. The new 2.8 FSI fits into the range between the 3.2 FSI and the 2.4.

The 2.8 FSI has the same bore as its big brother at 84.5 mm. Meanwhile its stroke is only 82.4 mm instead of 92.8 mm – this slightly oversquare configuration produces a swept volume of 2,773 cm3 and excellent responsiveness.

Lower friction, lower consumption

With the aid of a downsized water pump and other refined details, the engine developers were able to cut the total friction losses quite considerably. The frictional mean effective pressure at 2,000 rpm has been cut by 0.22 bar, equivalent to 25 percent. This effect produces a fuel saving of around 5 percent.

The 2.8 FSI, which develops 154 kW (210 bhp) at 5,500 rpm and generates a constant torque of 280 Nm between 3,000 and 5,000 rpm, will be able to demonstrate both its refinement and its potential for economy in the A6. Audi achieves consumption of 8.7 litres of premium-grade petrol per 100 km under standard conditions in the MVEG cycle – a substantial improvement on the 2.8 litre V6, which was in use up until 2000 in the A6 generation of the day. In that model, it achieved combined-cycle consumption of 9.9 litres of premium-grade petrol per 100 km with a five-speed gearbox, in other words 1.2 litres or almost 14 percent more; it also produced eight percent less power, at 142 kW (193 bhp). What better illustration of Vorsprung durch Technik could there be?

Related news: GermanCarBlog, P4MR, Audi

Source: AudiWorld

Audi: New 2.8 V6 FSI engine

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