Explore the components of the new A6:
1. Power steering motor More comfort, more agility
A premium feature of the Audi A6 is active steering that uses a power steering motor from ebm-papst. In this system, an additional shaft goes directly to the steering shaft, changing the steering gear ratio depending on the speed. Benno Kilzer, Head of Sales Automotive at ebm-papst, says: “In urban traffic and when parking, the steering is very smooth and easy. At higher speeds, it gets very direct and gives the driver high agility and lots of driving fun.”
Since steering is safety-relevant, the reliability of its components has top priority, which is guaranteed by great ruggedness and the hollow-shaft motor used by ebm-papst.“
2. Orbital pump Equipped for cold
As part of the AdBlue system in the Audi A6, an orbital pump from ebm-papst helps to considerably reduce nitrogen oxides in the exhaust. The pump delivers the urea-based fluid from the AdBlue tank to the exhaust system, where it is injected into the exhaust upstream of the catalytic converter. The orbital pump has a feature that makes it especially valuable in this application: it can pump in two directions without additional valves.
The animation shows the orbital pump in action.
That is important because AdBlue crystallizes at low subfreezing temperatures. When the engine is switched off, the orbital pump returns the AdBlue from the hoses back to the AdBlue tank so that the liquid cannot freeze in the hoses. ebm-papst supplies the orbital pump as a module including the drive, pump and electronics. Benno Kilzer says, “Besides pumping in two directions, it also has another big advantage. Since it’s a diaphragm pump, it can’t freeze. A frozen medium can expand inside the pump without damaging it.”“
3. Oil pump Reliable at maximum load
In the Audi A6’s seven-speed transmission, a motor from ebm-papst provides faithful service. While oil pumps for the automatic transmission used to be driven directly by the combustion engine, automakers today use electric pumps. This switch is what makes modern features such as automatic start /stop systems and gliding possible, because the transmission can shift even when the combustion engine is not running. And if the combustion engine is not running, that reduces CO2
emissions — an important concept for modern cars.
The ebm-papst motor in the pump has to satisfy exacting requirements. Benno Kilzer explains: “The oil pump runs in the oil sump, the part of the transmission that is always submerged in oil. The motor has to withstand this transmission oil and also the high temperatures of up to 160 degrees.” The motor can do that thanks to a combination of materials and design exactly tailored to Audi’s requirements.