BMW N47: Difference between revisions
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'''BMW N47''' is BMW's latest four-cylinder common rail diesel engine, with many improvements over its predecessor, the BMW M47. |
'''BMW N47''' is BMW's latest four-cylinder common rail diesel engine, with many improvements over its predecessor, the BMW M47. The BMW diesel engines N47 produced between 2007 and 2011 all have a particular design problem with the timing chains, they are very weak and stretch over time causing them to then snap. The BMW is ignoring the problem, always saying that the problem is residual, ignoring the thousands of vehicles across the world and especially in Europe are giving the same problem. A shame for a such giant premium car manufacturer. |
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==First use== |
==First use== |
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Revision as of 18:04, 21 December 2012
| BMW N47 | |
|---|---|
| Overview | |
| Manufacturer | BMW |
| Production | 2007-present |
| Layout | |
| Configuration | Straight-4 Diesel |
| Chronology | |
| Predecessor | BMW M47 |
BMW N47 is BMW's latest four-cylinder common rail diesel engine, with many improvements over its predecessor, the BMW M47. The BMW diesel engines N47 produced between 2007 and 2011 all have a particular design problem with the timing chains, they are very weak and stretch over time causing them to then snap. The BMW is ignoring the problem, always saying that the problem is residual, ignoring the thousands of vehicles across the world and especially in Europe are giving the same problem. A shame for a such giant premium car manufacturer.
First use
The N47 engine debuted in March 2007 in the face lifted 1 Series BMW E87 and E81 and was available in the 1 Series BMW E82 and E88, which were introduced later in the same year.
Usage in other models
The engine also became available in the 5 Series BMW E60 and E61 from September 2007, several months after the 5 series was face lifted, during which time the older M47 remained available.
In the 2008 model year 3 Series E90/E91/E92/E93 when the entire 3 series range gained the company's Efficient Dynamics technology. Not long after it became available in the X3 and has since then become available in the X1.
The N47 comes as a 1995 cc unit, identical in capacity to the BMW M47TU/TU2 series.
115bhp version
The 115 bhp tune is for the entry level E81 and E87 116d, as well as the entry level 3 Series E90 316d
143 bhp version
The 143 bhp model was used in the
- E81, E87 and E88 118d
- E90 and E91 318d
- E84 X1 sDrive18d and xDrive18d
- 2010-present MINI Countryman Cooper SD
- X3 xDrive18d.
163 bhp version
A new 163 bhp/265 lb ft (360 N m) derivative was introduced in September 2009 for the 2010 model year. This version featured exceptionally low CO2 emissions of only 109 g/km and fuel consumption of 68.9 mpg[1]
This version was used in the E90 BMW 320d Efficient Dynamics
177bhp version
The "standard" x20d model has 14 extra bhp, at 177 bhp but 7 lb ft of torque less at 258 lb ft(350 N m). This is found in the
- E81/E82/E87/E88 120d
- E90/E91/E92/E93 320d
- 5 Series E60 and E61 520d
- E84 X1 X1 sDrive20d, X1 xDrive20d and E83 X3 xDrive20d.
In Europe, this particular version is one of the most popular engines in the entire range; the best selling 3 series is the 320d, while the 520d is the UK's best selling 5 series.[2]
The updated version of this engine introduced in March 2010 produces 135 kW/184 hp@4000rpm and 380Nm@1750-2750rpm.
Twin turbo version
In October 2007, BMW introduced a twin sequential turbo model. With 204 bhp, it is the first production diesel on sale to achieve a specific output of over 100 bhp per liter. It uses the same turbo technology first shown in the E60 535d.
This engine is on sale in the E81/E82/E87/E88 123d and the E84 X1 xDrive 23d. This engine, which won the International Engine of the Year Award 2010.
Variants
| Engine | Displacement | Minimum specific fuel consumption(g/kWh) | Compression Ratio | Engine Weight(kg) | Power | Torque | Redline(rpm) | Injection Pressure(bar) | Relative Boost(bar) | MEP(bar) | Maximum combustion chamber pressure(bar) | Introduced in |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N47D20 | 2.0 L (1995 cc/121 in³) | 198 | 16.5:1 | 149 | 85 kW (116 bhp) @ 4000 rpm | 260 N m (192 lb ft) @ 1750 rpm | 09/2009 | |||||
| 105 kW (143 bhp) @ 4000 rpm | 300 N m (221 lb ft) @ 1750-3000 rpm | 5000 | 1600 | 1.5 | 19 | 170 | 03/2007 | |||||
| 120 kW (163 bhp) @ 3500-4200 rpm | 360 N m (265 lb ft) @ 1750-3200 rpm | 09/2009 | ||||||||||
| 130 kW (177 bhp) @ 4000 rpm | 350 N·m (258 lb ft) @ 1750-3000 rpm | 5000 | 1800 | 1.5 | 22 | 180 | 03/2007 | |||||
| 135 kW (184 bhp) @ 4000 rpm | 380 N·m (280 lb ft) @ 1750-2750 rpm | 5000 | 1800 | 1.5 | 22 | 180 | 03/2010 | |||||
| 16.1:1 | 161 | 150 kW (204 bhp) @ 4400 rpm | 400 Nm (295 lb ft) @ 2000 rpm | 5200 | 2000 | 2.0 | 25.3 | 200 | 10/2007 |
Future use
Rumors suggested that this engine will make its way into the E89, as a rival to Audi's TT TDI.[3]
BMW has held onto their straight 6 for the new F10/F11 525d, in the first phase of production of the car. Then in the 2nd part of 2011 the straight six was substituted by a diesel twin-turbo 2 litre developing 218 bhp and 450 Nm of torque, the same figure of the old straight six. The badge on the rear of the car says still 525d. Please note that this new 2.0 diesel twin.turbo develops 50 Nm and 14 bhp more than the old 123d engine (with 400Nm and 204 bhp,[4] ).
It is not yet known whether the new F10/F11 520d, featuring 184 bhp and 280 lb ft(380 N m) is going to be designated N47 or N47TU.
References
 |
- ^ "BMW 320d EfficientDynamics Edition coming to Frankfurt with 57 mpg". egmCarTech. 2009-08-21. Retrieved 2010-09-13.
- ^ http://www.fleetnews.co.uk/roadtests/story/index_print.asp?rtID=45251
- ^ 14 October 2008 (2008-10-14). "Spied:BMW Z4". Autocar.co.uk. Retrieved 2010-09-13.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ "BMW UK | BMW 5 Series | New Saloon". Bmw.co.uk. 2009-11-30. Archived from the original on 22 September 2010. Retrieved 2010-09-13.
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