Magazines:  Real Estate Shopping: Adult Costumes  |  Kids Costumes  |  Car Books  |  Guitars |  Electronics
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.
Easy - but only in retrospect!

DIY Tech Features - 28 June, 2011

Upgrading the Roomster's Front Brakes

...but it never turned a wheel in anger

Special Features - 8 April, 2014

The fastest Mercedes of them all?

A new engine designed to extend the range of plug-in hybrid cars

Special Features - 8 December, 2009

The Lotus Range Extender Engine

Building an adjustable temperature alarm - and more!

DIY Tech Features - 27 October, 2009

eLabtronics EZ System, Part 4

From the weird to the weirder!

Special Features - 27 June, 2000

The GM Concept Cars

How electric power steering systems work

Technical Features - 23 July, 2008

Electric Power Steering

A brilliant workshop fire alarm you can build yourself

DIY Tech Features - 8 September, 2009

DIY Workshop Fire Alarm

Stormwater and council inspection

DIY Tech Features - 20 March, 2012

A New Home Workshop, Part 6

A custom PowerChip remap - now she comes alive!

DIY Tech Features - 8 March, 2011

Powering-Up the 1.9 litre TDI, Part 4

More low cost aerodynamic testing techniques

DIY Tech Features - 14 April, 2009

Ultimate DIY Automotive Modification Tool-Kit, Part 3

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