BMW N55

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BMW N55 engine 2013.jpg
N55
Production period: 2009-2017
Manufacturer: BMW.svg BMW
Working principle: Otto
Motor design: R6
Drilling: 84 mm
Hub: 89.6 mm
Displacement: 2979 cm 3
Mixture preparation: Direct injection
Engine charging: Exhaust gas turbocharger
Power: 225-272 kW
Max. Torque: 400-465 Nm
Previous model: BMW N54
Successor: BMW B58

The N55 is a turbocharged in- line six-cylinder engine with four-valve technology from BMW . It was introduced in the BMW 5 Series Gran Turismo (535i GT) at the end of 2009 and is the first twin-scroll turbocharged gasoline engine from BMW with a Valvetronic system and direct injection . BMW calls this system BMW TwinPower Turbo .
The successor from 2015 was the BMW B58 modular engine.

construction

Like its predecessor, the engine with two overhead camshafts has an aluminum crankcase (engine block) in an open deck and bedplate design. The crankshaft is made of cast iron and is 3 kg lighter than that of the N54, which was forged. The cylinder head is also made of aluminum. The inlet valves have a diameter of 32.0 mm, the outlet valves are sodium-filled.

An innovation compared to the previous N54 B30 engine , which used two turbochargers, is that the N55 only has one turbocharger: the so-called twin-scroll charger , which has two separate spirals that guide the exhaust gas to the turbine wheel . While three cylinders were responsible for each turbocharger in the N54, three cylinders were responsible for one of the two spirals for driving the turbocharger in the N55. This turbocharger design saves 4 kg in weight compared to the previous N54, see weblink bimmertoday 2009.

In addition to the twin-scroll turbocharger, another new feature is that turbocharging has been combined with direct injection and Valvetronic for the first time in the N55 . Valvetronic is the stepless regulation of the lift of the intake valves, which makes the throttle valve superfluous. Nevertheless, this is available redundantly. The Valvetronic thus controls the air mass supplied for combustion in the engine itself. By combining these three systems, consumption has been reduced again and the response behavior has been improved compared to the N54.

For BMW M models, the engine is available as a sports version, the BMW S55, with up to 368 kW (500 hp). The most powerful variant in the M4 GTS uses water injection .

Data

Engine type Displacement Bore × stroke Power at 1 / min Torque at 1 / min Maximum speed Introductory year
N55B30 3.0 L (2979 cm³) 84 mm × 89.6 mm 225 kW (306 hp) at 5800-6000 400 Nm at 1200-5000 7100 min -1 since 11/2009
225 kW (306 hp) at 5800-6400 since 07/2013
235 kW (320 hp) at 5800-6000 450 Nm at 1300–4500 since 03/2011
240 kW (326 hp) for 5800-6000 since 10/2011
250 kW (340 hp) at 5800-6000 since 07/2013
265 kW (360 hp) at 5800-6000 465 Nm at 1350-5250 since 10/2015
272 kW (370 hp) at 6500 465 Nm at 1400–5560
(500 Nm at 1450–4750 with overboost )		 since 10/2015

use

N55B30
  • 225 kW (306 hp)
    • since 11/2009 in the F07 as 535i Gran Turismo
    • since 03/2010 in the F10 as a 535i
    • since 03/2010 in the E90 / E91 / E92 / E93 as 335i
    • since 03/2010 in the E82 / E88 as 135i
    • since 03/2010 in the E71 as X6 xDrive35i
    • since 06/2010 in the E70 as X5 xDrive35i
    • since 09/2010 in the F11 as a 535i Touring
    • since 11/2010 in the F25 as X3 xDrive35i
    • since 10/2011 in F30 / F31 as 335i
    • since 06/2013 in the F34 as 335i Gran Turismo
    • since 07/2013 in the F32 / F33 / F36 as a 435i
    • since 12/2013 in the F15 as X5 xDrive 35i
    • since 07/2014 in the F26 as X4 xDrive 35i
  • 235 kW (320 hp)
  • 240 kW (326 hp)
    • since 03/2010 in the E90 / E91 / E92 / E93 as a 335i with BMW M Performance Power Kit
    • since 03/2010 in the E82 / E88 as 135i with BMW M Performance Power Kit
    • since 10/2011 in the F30 / F31 as 335i and 335i xDrive with BMW M Performance Power Kit until 07/2013
    • since 07/2013 in the F34 as 335i and 335i xDrive Gran Turismo with BMW M Performance Power Kit until 07/2013
    • since 07/2013 in the F10 / F11 as 535i and 535i xDrive with BMW M Performance Power Kit from 07/2013
    • since 03/2014 in the BMW 2 Series as M235i
    • since 03/2015 in the BMW 1 Series as M135i
  • 250 kW (340 hp)
    • since 07/2013 in the F30 / F31 as 335i and 335i xDrive with BMW M Performance Power Kit from 07/2013
    • since 07/2013 in the F34 as 335i and 335i xDrive Gran Turismo xDrive with BMW M Performance Power Kit from 07/2013
    • since 07/2013 in the F32 / F33 / F36 as 435i and 435i xDrive with BMW M Performance Power Kit
  • 265 kW (360 hp)
    • since 10/2015 in the F26 as X4 M40i
  • 272 kW (370 hp)
    • since 10/2015 in the F87 as M2 Coupe

Web links

Individual evidence

  1. ↑ http://www.bimmertoday.de/2015/07/17/fahrbericht-bmw-340i-f30-lci-3er-facelift-mit-b58-motor/ , from July 17, 2015; Retrieved July 5, 2017
  2. ↑ AutoBild.de of August 22, 2018, The six cylinder of M GmbH , accessed on November 16, 2018.
Timeline of BMW gasoline engines for passenger cars since 1961
Number of cylinders Conception 1960s 1970s 1980s 1990s 2000s 2010s
0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
3 1.5 l B38
4th (1.5–2.0 l) M10
M40
M42
M43
M44
N40
N42
N45
N46
N43
N13
N20
B48
High performance motor S14
6th Small six-cylinder (2.0-3.0 l) M20
M50
M52
M54
Large six-cylinder (2.5-3.5 l) M30
N52
N53
N54
N55
B58
High performance motor M88
S38
S50
S52
S54
S55
8th 3.0-4.4 l M60
M62
N62
N63
High performance motor S62
S63
S65
10 High performance motor S85
12 5.0-6.6 l M70
M73
N73
N74
High performance motor S70
Number of cylinders Conception 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th 9 0 1 2 3 4th 5 6th 7th 8th
1960s 1970s 1980s 1990s 2000s 2010s