Someone doesn't like their new car...

[The_Laird]

Originally Posted by Goran

Its crazy that these modern engines are so unreliable or even possibly badly made. Wasn't there something about M3 or M5 crank shaft bearings a few years ago?
High time to switch to electricity I say, no more of this oil and fuel business, bearings, seals etc. Well, much fewer at least.

Goran, you can get expelled for talking like that!

[David's8]

Originally Posted by tintin

Interesting, and I sort of agree. I actually use the comparison between the complexity of a fuel based car and the relative simplicity of it's electric equivalent at work to clients to demonstrate how, as humans, we build in complexity over time. Far fewer parts, more efficient, simpler, etc etc….

Well it doesnt always work like that. Ships have moved from IC engine/steam turbine driven propellors via gearboxes and "through hull" shafts (with attendant problems) to electric driven azimuth pods. Which, in their turn, have suffered from seal issues (of the leaky sort, not munching the marine mammals) as well as control system issues. There aint a magic bullet. But I would agree that simpler is, generally, the better.

[tonupkid]

Our 2.0 TFSI Q5 had its pistons replaced, courtesy of Audi. Until then it was necessary to fill with oil each and every time it was filled with petrol. It now uses very little oil, so that's sorted. It just needs that eleccy motor to reduce its appetite petrol.

[goldsax]

sympathies to the poor owner,
and credit to his persistence.
My friends 3 year old A5 had to have an engine rebuild. did not know that it was such a widespread issue.
shame that class action and lemon laws such as in the USA are not allowed to occur here for car manufacturers.

[snapdragon]

Audi shouldn't even make these 2.0 litre 2WD cars, that's what Skoda and VW's are for.

[moltuae]

Originally Posted by snapdragon

Audi shouldn't even make these 2.0 litre 2WD cars, that's what Skoda and VW's are for.

Dead right!

[Amanda]

Seems it has now made the daily mail!!!!!



http://www.dailymail.co.uk/news/arti...-fills-up.html

[Conquistador]

Yep! I got in contact with the owner a few days ago so have asked him a few questions about the whole thing.

[tintin]

Originally Posted by Conquistador

Yep! I got in contact with the owner a few days ago so gave asked him a few questions about the whole thing.

…and it looks like the mail online spell checker is a bit better than the one on here.

[Conquistador]

Press release from Audi today for a new TFSI engine


-New 2.0 TFSI four-cylinder engine with innovative combustion method
-Top figures: 190PS, 320 Nm (236.0 lb-ft), in excess of 56mpg
-To be installed in the new Audi A4 by the end of 2015
-Prof. Dr. Ulrich Hackenberg: “A prime example of the Audi rightsizing strategy”

Audi is relentlessly pursuing an ever better balance between performance and economy across its engine range, and the latest evidence of this is a new 190PS 2.0-litre TFSI notable as the most efficient petrol-powered unit in its class. The newcomer exemplifies the brand’s Vorsprung durch Technik philosophy by way of an innovative new combustion method, and will be entered into service in the all-new A4 later in 2015.

Over ten years ago, Audi launched its first series production engine featuring a ground-breaking combination of turbocharging and direct injection. This made the brand with the four rings the trendsetter in downsizing and downspeeding.

“We’re now taking a crucial step further with rightsizing,” said Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at AUDI AG. The reduction in displacement and engine speed can be optimally effective only if reasonably related to the vehicle class and the customers’ everyday use, explains the Technical Director. “Rightsizing thus involves the optimal interplay of vehicle class, displacement, output, torque and efficiency characteristics under everyday conditions. Our new 2.0 TFSI is a prime example of Vorsprung durch Technik.”

The four-cylinder engine draws 190PS of power and 320 Nm (236.0 lb-ft) of torque from a displacement of 1,984 cc. Because the high torque is applied in a wide speed range from 1,450 to 4,400 rpm, every customer will benefit from the unit’s strong and constantly accessible pulling power.

The engine also outruns its predecessor and its direct competitors in terms of fuel efficiency, with a ground-breaking maximum of in excess of 56mpg possible according to the NEDC cycle test.

Technology in detail:

The breakthrough of the 2.0 TFSI lies in a new combustion method. At its core its principle is comparable to the Miller cycle. Audi engineers have further developed that method in crucial ways, however. The increase in efficiency is based on the following factors:

The intake time has been significantly shortened (140° crank angle (CA) rather than 190 to 200° CA).
Owing to a higher boost pressure on the inlet side, the engine attains optimal cylinder charges despite the shorter intake time.
The intake valve also closes earlier –well before the bottom dead centre is reached. This lowers the medium pressure, allowing a high, efficiency-boosting compression ratio.
In the partial load range, an additional injection upstream from the intake valve yields an efficient mixture formation that is already complemented by the direct injection in the intake manifold and in the combustion chamber.
The Audi Valvelift System (AVS) on the inlet side allows a short intake time at partial load and a longer time at higher loads (full load: 170° CA).
Dr. Stefan Knirsch, Head of Engine Development at Audi, sums up the benefits of the new engine: “Thanks to this rightsizing approach, the new engine enjoys the consumption benefits of a downsizing engine in partial load operation, while at higher loads it has the advantages of a large-displacement engine. The result is optimal efficiency and performance characteristics across the entire engine speed range.”

Beyond the new combustion method, the new engine, which weighs in at a relatively modest 140 kg, avails itself of other efficiency technologies. For example, the coolant flow is controlled so as to greatly shorten the engine warm-up time. The integration of the exhaust manifold into the cylinder head also brings benefits, as does the use of low-friction engine oil (0W-20).

The comprehensive package of high-tech solutions makes the new 2.0 TFSI a real high-efficiency engine that sets a new benchmark in its segment. Audi will be introducing the new generation of engines in the new Audi A4, and then in other model series.