In the Audi Q7 works new eight speed tiptronic

Audi saw the new automatic transmission "Eight-speed tiptronic-" their first use in the A8. Now she is in all new Q7 (Price from € 52 900) as standard. "The greatest strength of the newly developed from the ground up converter automatic is the high overall spread between the shortest translation in the first and longest is the last course of a range of 7,25:1," said Tobias Borchert, head of development at Audi automatic transmissions.

Advantage in practice

When launching the Q7 accelerates dynamic, on the highway it rolls on the top two corridors with low, fuel-efficient speeds. Compared to the six-speed tiptronic transmission in the predecessor, the new fuel consumption reduced. In the Audi Q7 Car works Eight-new-tiptronic - Car Search Audi Q7 works Eight-new-tiptronic - His eight steps to keep the speed jumps between the gears low, the engine always runs near his ideal operating point. And the gear changes are harmonious, which the driver does not notice fast.
Like the eight courses have been implemented technically?

"The eight stages by an additional switching element have been realized. The resulting slightly larger gear extension is through new narrow be built torque converters more than compensated as such that the entire transmission is building a total of shorter. The weight could be up to these measures to reduce kg to 11 "replies Borchert and further explained," the eight-stage-tiptronic was optimized efficiency in all components. One of the measures is the use of a smaller oil pump connected with the optimization of the oil flow in the transmission. Another is to reduce the Reiblamellenzahl in the couplings. have also been carried out many of the actions that ultimately led to a significant reduction in the drag losses or rental car. "

On efficiency

When it comes to efficiency, the torque converter clutch plays a big role. "It is closed during normal driving, making it the gear in the Audi Q7 works Eight-new-tiptronic - in the interest of efficiency connects directly to the motor. By using a Weitwinkeltorsionsdämpfers with extended effective range was the area where even with closed torque converter clutch can be driven, moved at lower speeds, "says Audi expert Borchert. In practice this means: standing, even if the level of D has been activated, a clutch is opened and thus separates the engine from the gearbox. When the driver releases the brake, the clutch closes.

Slightly different versions with car price

Depending on the engine will be installed this eight-tiptronic-in slightly different versions. The 3.0 TDI (240 kW PS/176) it was a small electrically controlled oil pump, the Audi Q7 works-new eight-speed tiptronic - about the start-stop function to realize - consumption: 7.4 litres/100 km (CO2 emissions 195 g / km). "When you restart the oil is pressed from the pump in the circuit elements that are necessary for starting. The gearbox is ready in no time," says Borchert. The dynamic shift program DSP uses a new, fast processor. In mode D, the DSP preferably in terms of efficient driving the big gears and a low speed level, in sport mode S it holds the gears longer when accelerating, to higher speeds. The choice of driving programs (P, R, N, D, S) and manual switching of the selector lever on the transmission tunnel. Those who want can also carry the gear shift manually with paddles on the steering wheel car price (460 €).