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Audi Canada

Stefan Dreyer: “The format of a DTM is unequivocally tough”

What are a stages of a growth routine for a new competition engine?
Following a initial judgment stage, we try to accumulate practice with a one-cylinder section comparatively fast. Subsequently, we rise a finish engine. Static and energetic supply contrast is followed by tests on a competition lane and eventually by deployment in racing. The whole plan is upheld by simulations and calculations.

How prolonged does it take to rise an engine like a new DTM turbo power-plant?
Two to dual and a half years. In a box of a DTM turbo engine, we stopped a growth for one year since a introduction of a new power-plant was deferred to 2019. Now we’re happy and unapproachable to be means to enter a new DTM epoch with a new engines. I’m assured that we’ll be means to broach a many fantastic furloughed automobile racing of all time to fans and customers.

How many hours did a new DTM engine run on a dyno?
That’s tough to quantify, though we consider that we’re in a operation of some 1,000 hours. Every engine subsequently runs on a dynamometer for another dual to 3 hours before being commissioned in a automobile for racing. We run a break-in program, a opening check and several organic checks. A DTM engine has to final for a full season. This means that a specialists on a dyno contingency be one hundred percent certain that a engine they’re going to muster is unequivocally top-notch. We request a four-eye element here to pledge that we’ll be in good figure on a grid.

What accurately happens in supply testing?
Rig contrast is a extended subject. Reduced to powertrain and engine development, we’re articulate about 3 forms of exam rigs. On a one-cylinder dyno, we concentration on explosion routine growth and attrition opening investigations and also already on continuation contrast to some extent. This has a advantage of permitting for quick and stretchable contrast of opposite versions. Then there’s a supposed engine dyno on that a full engine is grown and applied. Finally, there’s a cessation exam dais on that we run a whole downforce of a automobile with extent realism.

In a early days of a turbo engine, continuance was a large issue. Is this still a box today?
Technologies, materials and growth collection have seen a continual expansion over a years. However, when we rise a competition engine during a extent a simple plea is still a same, so we wouldn’t heed between yesterday and today. The format of a DTM is a good challenge. The prolonged mileage, distributed to many events with brief runs, is unequivocally tough.

What mileage is a DTM engine designed for?
For some 6,000 kilometers, in other difference a sum stretch driven during a season.

The new turbo engine has a lot some-more energy and aloft torque than a aged naturally aspirated V8 engine. What does this meant for a powertrain of a Audi RS 5 DTM?
The four-cylinder turbo power-plant delivers a aloft outlay of some-more than 100 horsepower. The aloft torque puts an additional bucket on a whole powertrain, too. Plus, a quivering function of a four-cylinder engine differs totally from that of a V8. That was a outrageous plea in a growth of a engine, as good as for a exam rigs.

What changes have been done to a automobile as a outcome of a new turbo engine?
First of all, a V8 engine had a incomparable volume. It had a symmetric pattern with dual cylinder banks and dual empty tracts. The new turbo engine has 4 cylinders in line, a empty complement and a turbocharger on a right and a intake complement on a left. The whole front of a automobile had to be blending to this new engine concept, for instance a position of a intercooler, a H2O and oil cooling systems, a pipes, as good as a optimal airflow to a engine.

How has a empty complement changed?
On a V8, it used to be commissioned on a left and right, some-more or rebate symmetrically with a tiny offset. On a four-cylinder engine, it runs along a right-hand side adult to about a car’s center.

The new turbo engine is some-more compress and smaller. Is it lighter as well?
The engine is clearly lighter than a V8, nonetheless a smallest weight prescribed by a regulations always has to be taken into account, too. The V8 many recently weighed 148 kilograms, since a four-cylinder turbo usually weighs 85. That’s a poignant weight reduction, that roughly accurately translates into a reduce dry weight of a vehicle.