Audi Q7 Hybrid

27 May 2015 | Author: | Comments Off on Audi Q7 Hybrid
Audi Q7

Audi Q7 Hybrid

Audi has announced that the Audi Q7 Hybrid will go on sale towards the end of 2008. The Audi Q7 Hybrid will be powered by a 280 PS 3.6 liter FSI petrol engine and an electric motor situated in the drivetrain powered by a 288-volt nickel metal hydride (NiMH) battery that develops 51 PS. The Audi Q7 Hybrid will accelerate from 0 to 62 mph in 7.6 seconds.

From Audi Press Release:

Petrol/electric hybrid Audi SUV waits in the wings as new cleaner, more economical TDI engine joins the range.

increased power and torque and improved performance

• Revised Audi Q7 3.0 TDI quattro available to order now in standard, SE and S line trim priced from £38,075 OTR to £41,475 OTR

• 240PS@4,000rpm, 550Nm from 1,750rpm to 2,750rpm, 0-62mph in 8.5 seconds, top speed 134mph, 34.9mpg, CO2 260g/km

• Working Audi Q7 petrol/electric hybrid prototype reduces consumption and emissions by over 20 per cent – production version is expected to go on sale in certain markets towards the end of 2008

The seven-seat Audi Q7 SUV benefits from a ‘win-win’ upgrade this week courtesy of a new version of its 3.0-litre V6 TDI engine which brings lower emissions, higher power and torque and improved performance and fuel economy.

The even more efficient 2008 Model Year Audi Q7 3.0 TDI quattro,

which is also now equipped with an exhaust-cleansing Diesel Particulate Filter (DPF), is available for order in standard, SE and S line trim priced from £38,075 OTR. It forms part of a Audi Q7 development programme which also includes petrol/electric hybrid versions that slash fuel consumption and emissions by over 20 per cent.

Featuring an advanced common rail direct fuel injection system using sophisticated piezoelectric quartz crystal technology, the upgraded V6 TDI engine benefits from enhancements that boost

combined cycle fuel economy in the Audi Q7 3.0 TDI quattro from 33.6mpg to 34.9mpg, reduce CO2 output from 279g/km to 260g/km and bring down the 0-62mph time by 0.6 seconds to 8.5 seconds. Power rises from 233PS to 240PS, delivered at 4,000rpm, and torque increases from 500Nm to an even healthier 550Nm, available from just 1,750rpm.

Diesel is of course far from the only source of responsibly delivered power to be championed by the Vorsprung durch Technik brand. As well as exploring the possibilities opened up by second generation ‘future fuels’ such as the biomass-to-liquid (BTL) SunFuel, Audi is also testing fully operational prototypes running on bioethanol (E85), CNG (compressed natural gas) and petrol/electric hybrid power.

The Audi Q7 hybrid reduces consumption and emissions by over 20 per cent

Audi Q7

The Audi Q7 hybrid is expected to go on sale in its first markets towards the end of 2008, combining its familiar 280PS 3.6-litre FSI petrol engine with an electric motor situated in the drivetrain powered by a 288-volt nickel metal hydride (NiMH) battery, which adds a further 51PS. The Audi Q7 hybrid reduces fuel consumption, and therefore C02 output, by approximately 23 per cent compared with the Audi Q7 3.6 FSI as we know it today.

Designed in a parallel configuration in which all major assemblies are arranged in line, helping to reduce weight and energy loss, the 3.6-litre FSI V6 with its 375 Nm torque peak is boosted by up to 285Nm by the electric motor. Channelled via a six-speed tiptronic gearbox and through the quattro four-wheel-drive system with asymmetric 40% front / 60% rear torque split, this joint output enables a 0-62mph acceleration time of just 7.6 seconds (standard Audi Q7 3.6 FSI 8.5 seconds) and combined fuel consumption of 28.8mpg (standard Audi Q7 3.6 FSI 22.2mpg). The Audi Q7 3.6 FSI’s 309g/km output is reduced to 237g/km thanks to the electric motor and a number of revisions to ancillaries such as the power steering pump.

Fundamentally, three driving modes are possible. The FSI engine and the electric motor can each work on their own as the drive unit, or the vehicle can combine the power of the two for acceleration. In this mode, the petrol engine is responsible for basic operation, whereby it also needs to supply energy to the battery.

Recuperation conserves energy

The electric motor on the other hand can operate independently and almost inaudibly at speeds of up to 30mph, considerably reducing exhaust and noise emissions in built up areas. It is also able to feed kinetic energy back into the system and so recharge the battery when the vehicle is braked or coasting. During this operation, known as recuperation, the motor reverses its function to become an alternator.

The capacity of the NiMH battery allows the vehicle to be driven up to 1.2 miles on purely electrical power – coasting and braking feed additional energy into the system. When the capacity limit of the battery has been reached, the combustion engine is activated to recharge the battery. Through regeneration measures such as these, the Audi Q7 hybrid recuperates about 720 kWh of energy a year – approximately a sixth of what a four-person household uses – based on an average of 12,000 miles per annum.

If the Audi Q7 hybrid is coasting without the accelerator pedal being depressed, the combustion engine is switched off – this is possible at speeds up to 74mph. It is also switched off if the vehicle remains stationary for more than three seconds. To continue the journey, all the driver has to do is to remove his foot from the brake and to depress the accelerator pedal again.

Like the standard Audi Q7, the hybrid also has space for three rows of seats and a large luggage compartment. The battery system that supplies energy to the electric motor is located in the spare wheel recess at the rear of the vehicle. Compared to earlier generations of hybrid vehicles, the electric motor and the battery are extremely lightweight.

The battery weighs 69 kg and the hybrid module with the electric motor 40 kg.

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