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2019 Audi Q8 - Technology Features
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The Audi Q8 will launch in the European markets as the Q8 50 TDI with the 3.0 TDI. The V6 diesel produces 210 kW (286 hp) and delivers 600 Nm (442.5 lb-ft) of torque. It accelerates the large SUV from 0 to 100 km/h (62.1 mph) in 6.3 seconds on its way to a top speed of 245 km/h (152.2 mph). Two more engine variants will follow in early 2019.
The 3.0 TDI in the Q8 50 TDI offers sophisticated solutions for many technologies. Thanks in part to its crankcase of lightweight vermicular graphite cast iron, it weighs just 190 kilograms (418.9 lb). The camshafts are hollow. The crankcase and the cylinder heads have separate coolant circuits so the ideal temperature level can be set for any driving situation. The heads feature two-piece water jackets. Cast-in channels cool the pistons with oil. Their rings and the wrist pins are designed for minimum friction; the oil pump is fully variable. The turbochargers generate up to 2.0 bar of relative charging pressure.
Mild hybrid technology
A key factor for the efficiency is the mild hybrid technology from Audi. In customer operation, it can save as much as 0.7 liters per 100 kilometers. In the Audi Q8, a 48-volt main electrical system incorporates two important technology modules: a lithium-ion battery located beneath the luggage compartment floor and a 48-volt belt alternator starter (BAS) connected to the crankshaft. During braking, it can recover up to 12 kW of power and feed it back into the battery.
At speeds between 55 and 160 km/h (34.2 and 99.4 mph), the SUV coupé can coast for up to 40 seconds with the engine deactivated when the driver lets off the accelerator. The BAS then restarts the engine quickly and very smoothly. The start-stop range begins at 22 km/h (13.7 mph).
The suspension
Responsive on narrow country roads, composed on the highway and robust off-road: the suspension of the Audi Q8 also combines the best characteristics from various worlds. Five-link suspensions are used at the front and rear so that longitudinal and lateral forces can be handled separately. The linkages and the subframes are made largely of aluminum. The SUV coupé has a track of 1,679 millimeters (5.51 ft) up front and 1,691 millimeters (5.55 ft) at the rear.
The standard progressive steering in the Audi Q8 features a sporty and rather low ratio of 14.6:1 in the center position and becomes even more direct with increasing steering angle. The steering system with its electromechanical drive provides differentiated road feedback. It responds spontaneously and is highly precise.
Audi also offers optional all-wheel steering. With this system, a high-torque electric spindle drive and two track rods turn the rear wheels. At low speeds, they turn up to 5 degrees opposite the direction of the front wheels. They thus reduce the SUV's turning circle by a good meter (3.3 ft) and make it even more agile. At high speeds, they turn up to 1.5 degrees in the same direction as the front wheels to provide greater stability during fast lane changes.
The Q8 rolls off the assembly line on 19-inch wheels with particularly good aerodynamic properties and 265/55-series tires. 20-, 21- and 22-inch tires are optionally available, the latter with 285/40 tires. All wheels are 20 millimeters (0.8 in) larger in diameter than those of the Q7. The 21- and 22-inch wheels feature torus absorbers - layers of foam between the running surface and the carcass - to dampen undesired frequencies and noise radiation. Mounted on the front axle of the Audi Q8 are six-piston, fixed-caliper brakes. The discs have central pots made of aluminum; the internally vented friction rings are made of cast iron. They measure a large 375 millimeters (14.8 in) in diameter up front and 350 millimeters (13.8 in) in the back.
Audi also offers a number of assist systems separately.One highlight for driving with a trailer is the improved trailer maneuver assist. It automatically guides the trailer while reversing in the direction the driver set by swiping on the lower MMI display. The camera image on the upper display shows the current and the desired reversing angle. The driver can observe the maneuver accordingly and steer in the desired direction at any time. Audi also supplies
park assist separately, if desired. This steers the Q8 virtually automatically into parallel and perpendicular parking spaces - forwards or backwards. The driver only has to accelerate, select the gear and brake. The night vision assist improves difficult visibility after dark. It uses an infrared camera to detect pedestrians and larger wild animals at great distances and marks them with a yellow frame in the Audi virtual cockpit.
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The 3.0 TDI in the Q8 50 TDI offers sophisticated solutions for many technologies. Thanks in part to its crankcase of lightweight vermicular graphite cast iron, it weighs just 190 kilograms (418.9 lb). The camshafts are hollow. The crankcase and the cylinder heads have separate coolant circuits so the ideal temperature level can be set for any driving situation. The heads feature two-piece water jackets. Cast-in channels cool the pistons with oil. Their rings and the wrist pins are designed for minimum friction; the oil pump is fully variable. The turbochargers generate up to 2.0 bar of relative charging pressure.
Mild hybrid technology
A key factor for the efficiency is the mild hybrid technology from Audi. In customer operation, it can save as much as 0.7 liters per 100 kilometers. In the Audi Q8, a 48-volt main electrical system incorporates two important technology modules: a lithium-ion battery located beneath the luggage compartment floor and a 48-volt belt alternator starter (BAS) connected to the crankshaft. During braking, it can recover up to 12 kW of power and feed it back into the battery.
At speeds between 55 and 160 km/h (34.2 and 99.4 mph), the SUV coupé can coast for up to 40 seconds with the engine deactivated when the driver lets off the accelerator. The BAS then restarts the engine quickly and very smoothly. The start-stop range begins at 22 km/h (13.7 mph).
The suspension
Responsive on narrow country roads, composed on the highway and robust off-road: the suspension of the Audi Q8 also combines the best characteristics from various worlds. Five-link suspensions are used at the front and rear so that longitudinal and lateral forces can be handled separately. The linkages and the subframes are made largely of aluminum. The SUV coupé has a track of 1,679 millimeters (5.51 ft) up front and 1,691 millimeters (5.55 ft) at the rear.
The standard progressive steering in the Audi Q8 features a sporty and rather low ratio of 14.6:1 in the center position and becomes even more direct with increasing steering angle. The steering system with its electromechanical drive provides differentiated road feedback. It responds spontaneously and is highly precise.
Audi also offers optional all-wheel steering. With this system, a high-torque electric spindle drive and two track rods turn the rear wheels. At low speeds, they turn up to 5 degrees opposite the direction of the front wheels. They thus reduce the SUV's turning circle by a good meter (3.3 ft) and make it even more agile. At high speeds, they turn up to 1.5 degrees in the same direction as the front wheels to provide greater stability during fast lane changes.
The Q8 rolls off the assembly line on 19-inch wheels with particularly good aerodynamic properties and 265/55-series tires. 20-, 21- and 22-inch tires are optionally available, the latter with 285/40 tires. All wheels are 20 millimeters (0.8 in) larger in diameter than those of the Q7. The 21- and 22-inch wheels feature torus absorbers - layers of foam between the running surface and the carcass - to dampen undesired frequencies and noise radiation. Mounted on the front axle of the Audi Q8 are six-piston, fixed-caliper brakes. The discs have central pots made of aluminum; the internally vented friction rings are made of cast iron. They measure a large 375 millimeters (14.8 in) in diameter up front and 350 millimeters (13.8 in) in the back.
Audi also offers a number of assist systems separately.One highlight for driving with a trailer is the improved trailer maneuver assist. It automatically guides the trailer while reversing in the direction the driver set by swiping on the lower MMI display. The camera image on the upper display shows the current and the desired reversing angle. The driver can observe the maneuver accordingly and steer in the desired direction at any time. Audi also supplies
park assist separately, if desired. This steers the Q8 virtually automatically into parallel and perpendicular parking spaces - forwards or backwards. The driver only has to accelerate, select the gear and brake. The night vision assist improves difficult visibility after dark. It uses an infrared camera to detect pedestrians and larger wild animals at great distances and marks them with a yellow frame in the Audi virtual cockpit.
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