BMW N46

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BMW N46B20

The BMW N46 is an in-line four-cylinder gasoline engine from the car manufacturer BMW , it replaced the N42 . The N46 made its debut in the 3 Series ( BMW E46 ) in 2003 and was offered in the E87 120i from 9/2004 .

Fine tuning was important when developing the N46. The main design features of the N42 have been adopted. The following assemblies were changed:

  • Balancer shafts
  • Connecting rod
  • Spark plugs
  • Vacuum pump
  • Roller rocker arm
  • Cylinder head cover
  • new digital engine electronics (DME) Bosch MEV 9.2 with integrated Valvetronic control unit

In contrast to its predecessor, the amount of fuel was now regulated via the lambda sensors even in full load operation. This lowered fuel consumption and reduced the content of carbon monoxide (CO), hydrocarbons (H m C n ), nitrogen oxides (NO x ) and, above all, benzene in the exhaust gas. Benzene is considered to be carcinogenic.

In 2006 the N46 was modified again (including the DME Bosch MV17.4.6) and offered as the N46N. It is intended for countries with high sulfur concentrations in fuel, in which the N43 cannot be used.

The engine without Valvetronic is also available as the N45 with 1.6 and 2.0 liter displacement.

Data

Engine type Displacement Bore × stroke Valves / cyl. Power at 1 / min Torque at 1 / min construction time
N46B18 1.8 l (1796 cm 3 ) 84 mm × 81 mm 4th 85 kW (115 PS) at 5500 175 Nm at 3750 2003-2005
N46B20 2.0 l (1995 cm 3 ) 84 mm × 90 mm 4th 95 kW (129 hp) at 5750 180 Nm at 3250 2004-2007
105 kW (143 hp) at 6000 200 Nm at 3750 2004-2005
110 kW (150 PS) at 6200 200 Nm at 3600 2004-2008
110 kW (150 PS) at 6200 200 Nm at 3750 * 2005-2010
110 kW (150 PS) at 6400 ** 200 Nm at 3600 2010–2012
N46NB20 105 kW (143 hp) at 6000 190 Nm at 4500 2006–2012
N46NB20 125 kW (170 hp) at 6400 210 Nm at 4100 2006–2012

Source:

use

N46B18

  • 1.8 liters (1796 cm³), 85 kW (115 PS), 175 Nm.
    • E46 316i / 316ti

N46B20

  • 2.0 liters (1995 cc).
  • 95 kW (129 PS), 180 Nm
  • 105 kW (143 PS), 200 Nm
    • E46 318i / 318Ci / 318ti (until 03/2005)
  • 110 kW (150 PS), 200 Nm

N46NB20 (only in some markets.)

Individual evidence

  1. ↑ E60 facelift, sedan 520i (N46N), engine electronics - picture panels. bmw-fans.info, accessed on December 17, 2012 .
  2. ↑ BMW-Treff Forum. auto-treff.com, accessed December 17, 2012 .
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