BMW N62 explained

BMW N62
Production:2001-2010
Configuration:Naturally aspirated 90° V8
Displacement:3600cc
4000cc
4398cc
4799cc
Bore:842NaN2
872NaN2
922NaN2
93mm
Stroke:81.22NaN2
84.12NaN2
82.72NaN2
88.32NaN2
Valvetrain:DOHC w/ VVT & VVL
Block:Aluminium
Head:Aluminium
Fueltype:Petrol
Fuelsystem:Port injected
Predecessor:BMW M62
Successor:BMW N63

The BMW N62 is a naturally aspirated V8 petrol engine which was used in BMW cars from 2001–2010. It also remained in small-scale production for the Morgan Aero until 2019.[1] The N62 is the world's first engine to use a continuously variable-length intake manifold,[2] and BMW's first V8 to feature variable valve lift (called Valvetronic).[3] [4] [5]

Unlike its predecessor and successor, there was no M version of the N62.

In the International Engine of the Year awards in 2002, the N62 was awarded "International Engine of the Year", "Best New Engine" and "Above 4-litre" categories.[6]

Design

The N62 was a clean sheet design and not a direct evolution of the M60 engine line that evolved into the M62 engine. The N62 has a bore of 92mm and stroke of 82.7mm for a total displacement of 4,398cc and features double-VANOS variable valve timing on both the intake and exhaust camshafts (the M62 features variable valve timing on only the intake camshaft).[7] As per the M62, the N62 has double overhead camshafts (DOHC) with four valves per cylinder, an aluminium engine block and an aluminium cylinder head. The N62 4.4 featured offset fracture-split forged powdered metal connecting rods and it was also the first V8 and only the second BMW engine to feature Valvetronic technology which on the N62 varies the valve lift of the engine from .03mm to 9.85mm.[8] The redline is 6500 rpm.[4] Valvetronic technology allows for variable valve timing, variable lift and variable duration and the N62 adjusts the lift instead of utilizing the throttle body during normal operation. The engine does feature a throttle body but this is only used for emergency applications in the event of Valvetronic failure, for certain cold start conditions and to maintain a set amount of vacuum in the intake during low load conditions such as cruising on the highway or idling. The vacuum pump mounted on the bank 1 cylinder head only supplies the brake booster and certain auxillaries with vacuum, making the use of the standard TB for manifold vacuum control a requirement for proper functioning of the crankcase ventilation system as well as the fuel evap valve and other emissions related systems.[9]

The N62B44 is the only production engine in the world to feature a continuously variable length intake manifold known as the DIVA intake (not to be confused with the DISA intake as used on many other BMW production engines). The intake length path begins to shorten at 3,500 RPM and is progressively shortened until it reaches it's shortest length at the engine's redline. This maximizes torque throughout the RPM range, producing a much broader torque curve and more peak HP.

Applications:

The N62B48 engine used in the E53 X5 4.8is was a 4.8L variant of the N62B44 which still utilized many features of the N62B44 such as the DIVA intake manifold.

The N62B44 was evolved into the N62B48TU beginning in model year 2005.[10] The N62B48 featured several changes over the N62B44, including an increase in the bore size to 93mm and stroke to 88.3mm which increased the displacement to 4798.52 cc. Other changes include different exhaust manifolds, replacement of the DIVA continuously variable length intake manifold to a DISA two-stage manifold, removal of secondary air injection ports and several small changes to accommodate the longer stroke crankshaft such as more traditional non-offset connecting rods and a deeper oil pan. It also featured different spark plugs, oxygen sensors, engine computer and inlet and exhaust valves with a stem diameter decreased to 5mm from 6mm.

Applications:

Versions

EngineDisplacementPowerTorqueYear
36001NaN1 2000NaN0
at 6,200 rpm
3600NaN0
at 3,700 rpm
2001
40001NaN1 2250NaN0
at 6,300 rpm
3900NaN0
at 3,500 rpm
2005
N62B4443981NaN1 2350NaN0
at 6,100 rpm
4400NaN0
at 3,700 rpm
2003
2450NaN0
at 6,100 rpm
4500NaN0
at 3,600 rpm
2001
47991NaN1 2650NaN0
at 6,200 rpm
5000NaN0
at 3,500 rpm
2004
2610NaN0
at 6,300 rpm
4750NaN0
at 3,400 rpm
2005
2700NaN0
at 6,300 rpm
4900NaN0
at 3,400 rpm
2005
H143981NaN13680NaN0
at 5,500 rpm
7000NaN0
at 3,500 rpm
2007
3900NaN0
at 5,500 rpm
7250NaN0
at 4,750 rpm
2007

N62B36

The N62B36 is a 36001NaN1 version. Bore is 841NaN1 and stroke is 81.21NaN1. It produces 200kW at 6,200 rpm and 360Nm at 4,250 rpm. [11]

Applications:

N62B40

The N62B40 is a 40001NaN1 version. Bore is 871NaN1 and stroke is 84.11NaN1. It produces 225kW at 6,300 rpm and 390Nm at 3,500 rpm. [7]

Applications:

N62B44

The N62B44 is a 43981NaN1 version. Bore is 921NaN1 and stroke is 82.71NaN1. It produces 245kW at 6,100 rpm and 450Nm at 3,600 rpm. (except for in the X5 model).

Applications:

N62B48

The N62B48 has a displacement of 47991NaN1, a bore of 931NaN1 and a stroke of 88.31NaN1.

Applications- 261 kW version:

Applications- 265 kW version:

Applications- 270 kW version:

Alpina H1

The H1 is a version of the N62B44 made by Alpina. The H1 is based on an N62B44 block with a forged crankshaft from Alpina, high strength Mahle pistons and the addition of an ASA centrifugal supercharger.[14] The H1 has a redline of 6,200 rpm.

Applications- 368 kW

Applications- 390 kW

See also

Notes and References

  1. The Last Aero . Evo Australia . January 2019 . 130.
  2. Hirschfelder . Klaus . Völkl . Werner . Kühnel . Hans-Ulrich . Sinn . Walther . Huck . Armin . The first continuously variable intake system in the new eight-cylinder engine from BMW . MTZ Worldwide . March 2002 . 63 . 3 . 2–6 . 10.1007/bf03227525 . en . 2192-9114.
  3. Web site: BMW E65 - Drive. https://web.archive.org/web/20210107174442/https://drive-my.com/en/social/stream/item/6884.html. dead. January 7, 2021. www.drive-my.com. 3 June 2017.
  4. Web site: BMW Heaven Specification Database | Engine specifications for N62 engines . 2012-08-19 . 2015-09-23 . https://web.archive.org/web/20150923192908/http://www.bmwheaven.com/database/engine.php?type=N62 . live .
  5. Web site: BMW Engines: From M to N – Part 2. www.bmwblog.com. 27 June 2017. 2008-12-27. 2021-10-06. https://web.archive.org/web/20211006191021/https://www.bmwblog.com/2008/12/27/bmw-engines-from-m-to-n-part-2/. live.
  6. Web site: Previous Winners . www.ukimediaevents.com . 24 November 2018 . en . 24 November 2018 . https://web.archive.org/web/20181124110349/https://www.ukimediaevents.com/engineoftheyear/archive.php . live .
  7. Web site: BMW N62 V8 Engine. www.unixnerd.demon.co.uk. 1 July 2017. 17 January 2020. https://web.archive.org/web/20200117170511/http://www.unixnerd.demon.co.uk/n62.html. dead.
  8. Web site: BMW N62 V8 Technical Information. www.internetsomething.com. 16 November 2022.
  9. Web site: BMW N62 V8 Technical Information. www.internetsomething.com. 16 November 2022.
  10. Web site: BMW N62 V8 Technical Information. www.E90post.com. 16 November 2022.
  11. Web site: BMW 735i E65 specifications. www.carfolio.com. 29 June 2017. 12 August 2018. https://web.archive.org/web/20180812213835/https://www.carfolio.com/specifications/models/car/?car=82676. live.
  12. Web site: 2005 Morgan Aero 8 New Car Buyer's Guide . Autosite.com . 2010-09-13 . https://web.archive.org/web/20100920043430/http://www.autosite.com/content/research/buyersguide/index.cfm/action/viewGuide/year_si/2005/make_vch/Morgan/model_vch/Aero%208/xml/2005-morgan-aero-8.xml . 20 September 2010 . dead .
  13. Web site: Press release: Morgan announces 5th generation Aero 8 . Morgan . 2015 . 2017-01-27 . 2017-07-08 . https://web.archive.org/web/20170708231501/https://www.morgan-motor.co.uk/wp-content/uploads/2015/02/aero8pressrelease.pdf . live .
  14. Web site: ALPINA B5 Roadtest . www.fastsaloons.com . 20 November 2018 . https://web.archive.org/web/20181120220946/http://www.fastsaloons.com/newsstory.php?reviewField=2567 . 20 November 2018 . dead .
  15. Web site: BMW 5 Series E60/61: ALPINA Automobiles . www.alpina-automobiles.com . 2018-12-02 . 2018-10-06 . https://web.archive.org/web/20181006075207/https://www.alpina-automobiles.com/en/product-world/model-history/bmw-5-series/bmw-5-series-e6061/ . live .
  16. Web site: BMW 6 Series E63/64: ALPINA Automobiles . www.alpina-automobiles.com . 2 December 2018 . 28 October 2017 . https://web.archive.org/web/20171028055304/http://www.alpina-automobiles.com/en/product-world/model-history/bmw-6-series/bmw-6-series-e6364/ . live .
  17. Web site: BMW 7 Series E65/66: ALPINA Automobiles . www.alpina-automobiles.com . 2 December 2018 . 20 June 2018 . https://web.archive.org/web/20180620024757/https://www.alpina-automobiles.com/en/product-world/model-history/bmw-7-series/bmw-7-series-e6566/ . live .