Magazines:  Real Estate Shopping: Adult Costumes  |  Kids Costumes  |   |  Guitars |  
This Issue Archived Articles Blog About Us Contact Us
SEARCH


BMW's V12 Twin Turbo

An amazing torque curve...

by Julian Edgar

Click on pics to view larger images


Click for larger image

BMW’s new 760i limousine features a new-from-the-ground–up, 6-litre, twin turbo V12 engine.

Click for larger image

Developing no less than 400kW and a staggering 750Nm, the engine features water/air intercooling, infinitely variable valve timing and direct petrol injection. (Click on any pic to enlarge.)

Click for larger image

The amazing torque curve can be seen here with peak torque developed from just 1500 rpm. It’s then as flat as a ruler until 5000 rpm! Peak power is at a low 5250 rpm.

Click for larger image

The 60 degree V12 is over-square with a bore of 89mm and a stroke of 80mm. It displaces 5972cc and has a compression ratio of 10:1. Required fuel octane is 91-98 RON.

Click for larger image

Two turbos are used – one being driven by each cylinder bank. The exhaust manifolds are double wall, two-into-one designs. The cat converters (also double walled) are close-coupled for fast light-off and the mufflers use a variable flow design.

Click for larger image

A water/air intercooler system (that has what looks to be a surprisingly small core) is used with a dedicated pump and cooling circuit.

Click for larger image

The direct fuel injection system uses piezo design injectors positioned in the middle of the combustion chambers. Fuel is fed to them via stainless steel pipes and injection occurs at 200 Bar pressure. This pressure is generated by single-plunger fuel pumps, one on each cylinder bank, driven by dedicated lobes on the camshafts.

Click for larger image

The injection occurs in very close proximity to the spark plugs.

Click for larger image

Double VANOS infinitely adjustable valve timing is used on both the exhaust and intake cams. The exhaust valve stems are sodium-filled and have hard chrome plated shafts.

Click for larger image

The oil pump is a six chamber, pendulum-slide, variable flow design. Monitoring the 10.5 litres of engine oil is a level sensor integrated into the sump, replacing the need for a manual dipstick. An oil level display is provided on the dashboard.

Click for larger image

The coolant pumps are electric and operate only on demand. Coolant passages are arranged close to oil passages so that the oil is quickly brought up to – and then maintained at – working temperature. Coolant volume is 15.1 litres.

Click for larger image

Backing the engine is a newly-designed 8-speed automatic transmission.

Click for larger image

The 2.1 tonne BMW 760i accelerates to 100 km/h in 4.6 seconds, has an EU test cycle fuel consumption of 12.9 litres/100km and CO2 emissions of 299 grams/kilometre.

Did you enjoy this article?

Please consider supporting AutoSpeed with a small contribution. More Info...


Share this Article: 

More of our most popular articles.
To improve fuel economy, why not just reduce the amount of fuel that's injected?

Technical Features - 5 August, 2008

Running Lean for Economy

Cheaper than a half-cut and lots more bits!

DIY Tech Features - 17 April, 2012

Buying at Salvage Auctions

Do-it-yourself aero testing of an Impreza WRX

Technical Features - 23 June, 2007

Aero Testing, Part 2

Want to build your own home workshop? Here's how to begin.

DIY Tech Features - 12 August, 2008

Building a Home Workshop, Part 1

So what makes a vehicle have a good ride?

Technical Features - 4 May, 2010

Ride Quality, Part 1

We could be served up far better new cars

Special Features - 30 October, 2012

Three utter failings of current cars

Gorgeous and fast

Special Features - 3 June, 2014

The Auto Union Racing Cars

Under $20 and an hour for a welding trolley

DIY Tech Features - 26 November, 2013

Make your own welding trolley

Finding the best fuel for cars of the future - the real answers

Technical Features - 18 March, 2008

Assessing the Alternatives

Books that you'll keep forever

Special Features - 24 March, 2009

The Ten Must-Have Books

Copyright © 1996-2019 Web Publications Pty Limited. All Rights ReservedRSS|Privacy policy|Advertise
Consulting Services: Magento Experts|Technologies : Magento Extensions|ReadytoShip