BMW N20

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BMW
BMW N20 engine

BMW N20 engine
N20
Production period: 2011-2017
Manufacturer: BMW
Working principle: Gasoline engine
Motor design: Inline four-cylinder
Valve control: Valvetronic
Drilling: 84 mm
Hub: 90.1 mm
Displacement: 1997 cm 3
Mixture preparation: Direct injection (High Precision Injection)
Engine charging: turbocharger
Power: 115-180 kW
Max. Torque: 240-350 Nm
Dimensions: 1670 kg
Previous model: N52
N53
Successor: B48

The BMW N20 is a gasoline engine from the car manufacturer BMW with four cylinders in line and turbocharging . The new generation of engines was presented in January 2011. The first car with this engine is the X1 xDrive28i . There it replaced the six-cylinder N52 and has since been used successively in other series.

technology

General

The N20 engine was developed as a component of the EfficientDynamics concept, which is intended to reduce fuel consumption and pollutant emissions while improving driving performance. The design is based on the six-cylinder N55 , which has advanced into performance ranges that were previously reserved for engines with eight cylinders. The N20 has two fewer cylinders than the N52 and N53 , which it is intended to complement or replace. As a result, it has lower friction losses, is lighter and therefore consumes less fuel.

In the X1 xDrive28i , the N20 achieves a weight advantage of 15 kg compared to the N52 (curb weight with automatic transmission according to EU: N20 1670 kg, N52 1685 kg) and an average fuel consumption of 1.5 l in the EU test cycle (7.9 l to 9, 4 l).

engine

The engine block and cylinder head are made of aluminum . The engine has two overhead camshafts and the camshaft adjustment double VANOS . The lift of the inlet valves can also be adjusted using the Valvetronic system, which uses a new servomotor with a built-in sensor to achieve higher actuating speeds. The throttle valve is thereby superfluous, whereby the throttle losses are reduced and the response behavior is improved. The mixture is prepared by the gasoline direct injection known as High Precision Injection (HPI) . Via solenoid valve injectors arranged centrally between the valves, the fuel is transported in a jet to the spark plug with a maximum injection pressure of 200 bar, which enables more precise metering of the fuel. The cooling effect of the directly injected gasoline enables higher compression to be achieved.

Charging

The turbocharger has two separate inlet spirals ( Twin-Scroll , called TwinPower at BMW). The cylinders are combined in groups with a favorable ignition interval (240 ° for three-cylinder groups, 360 ° for two-cylinder groups). Therefore, at the end of the fourth stroke, when the inlet and outlet valves are open, there is a low pressure in the exhaust line, as a result of which the combustion chamber can be flushed with air. This increases the mass flow and the compressor works further away from the surge limit with better efficiency and higher speed. In addition, the residual gas content in the combustion chamber decreases, which reduces the tendency to knock. Twin scrollers are normally combined with camshaft actuators and direct injection in gasoline engines in order to be able to use the flushing effect without unburned fuel getting into the exhaust.

Periphery

Measures from the EfficientDynamics package also help to save fuel , including brake energy recovery , electric power steering and an automatic start-stop system . What is new is the need-based regulation of the oil pump and an electrically driven coolant pump that can be controlled independently of the engine speed as required.

Data

Engine type Displacement Bore × stroke Power at 1 / min Torque at 1 / min compression construction time
N20B20 2.0 L (1997 cm 3 ) 84 mm x 90.1 mm 115 kW (156 hp) at 5000-6250 240 Nm at 1250-4400 10.0: 1 since 03/2013
135 kW (184 hp) at 5000-6250 270 Nm at 1250-4500 11.0: 1 since 09/2011
160 kW (218 hp) at 5000 310 Nm at 1350-4800 10.0: 1 since 03/2012
175 kW (238 hp) at 5000 350 Nm at 1250-4800 10.0: 1 since 10/2013
180 kW (245 PS) at 5000–6500 at 5000–6000 *
00000000000000		 350 Nm at 1250-4800 10.0: 1 since 03/2011

* BMW Z4 sDrive28i

use

N20 in the BMW 328i
N20B20 (115 kW)
  • BMW Z4 ( E89 ) sDrive18i, since 03/2013
N20B20B (135 kW)
  • BMW 220i ( F22 ), since 11/2013
  • BMW 320i ( F30 ), since 03/2012
  • BMW 420i ( BMW 4 Series ), 11/2013 to spring 2016
  • BMW 520i ( F10 ), 09/2011 to 2017
  • BMW X1 sDrive20i / xDrive20i ( E84 ), since 09/2011
  • BMW X3 xDrive20i ( F25 ), since 09/2011
  • BMW Z4 ( E89 ) sDrive20i, since 09/2011
N20B20 (160 kW)
  • BMW 125i ( F20 ), 03/2012 to summer 2016
N20B20 (175 kW)
  • BMW 125i with BMW M Performance Power Kit ( F20 ), since 10/2013
N20B20A (180 kW)
  • BMW 228i ( F22 ), 07/2014 to summer 2016
  • BMW 328i ( F30 ), 10/2011 to summer 2015
  • BMW 428i ( BMW 4 Series ), 07/2013 to spring 2016
  • BMW 528i ( F10 ), 09/2011 to 2017
  • BMW X1 xDrive28i ( E84 ), since 03/2011
  • BMW X3 xDrive28i ( F25 ), since 11/2011
  • BMW X5 xDrive40e ( F15 ), since 2015
  • BMW Z4 ( E89 ) sDrive28i, since 09/2011

Web links

Individual evidence

  1. ↑ http://www.autobild.de/artikel/bmw-x1-xdrive28i-vierylinder-1193410.html from January 19, 2011, April 7, 2018 available.
  2. ↑ https://www.press.bmwgroup.com/pressclub/p/de/pressDetail.html?outputChannelId=7&id=T0094675DE&left_menu_item=node__2243 Technical data BMW X1 xDrive28i available from 03/2011, 7 April 2018.
  3. ↑ http://www.bimmertoday.de/2009/07/03/alle-details-zum-neuen-bmw-x1-e84/ , April 7, 2018 available.
  4. ↑ a b c http://australiancar.reviews/bmw_N20.php BMW N20 at AustralianCar.Reviews (English), accessed April 8, 2018.
  5. ↑ http://australiancar.reviews/bmw_N20.php BMW N20 at AustralianCar.Reviews, section Injection and Ignition (English), accessed April 9, 2018.
  6. ↑ a b bimmertoday.de report on 4-series engines (heading mentions 440i) from January 14, 2016, accessed February 12, 2018.
  7. ↑ a b Report from auto motor und sport on the 5 Series G30 (2017) from October 13, 2016, accessed February 12, 2018.
  8. ↑ BMW: New engines for the 2017 model year at Heise.de from May 18, 2016, accessed February 12, 2018.
  9. ↑ B48 engine with 252 HP in the 2 series at bimmertoday.de from May 18, 2016, accessed February 12, 2018.
  10. ↑ Facelift of the triple row F30 / 31/34 Auto Zeitung from May 23, 2015, accessed February 12, 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