BMW N47 Straight-4 Diesel Engine
From 2007 on
The engine has an aluminum crankcase with thermally joined gray cast iron liners. To improve smoothness, two needle-bearing balancer shafts are integrated in the crankcase (not for the 85 kW version in the 116d). The four-valve cylinder head has two overhead camshafts that operate via roller rocker arms the valves. The common-rail injection system operates at pressures of 1600 to 2000 bar on the N47. The fuel is injected into the combustion chamber via centrally positioned solenoid valve injectors or piezo injectors. In most variants, a turbocharger with adjustable turbine vanes is installed, the most powerful stages (150 kW and 160 kW) have two turbochargersworking on a combined principle of register charging and multi-layer charging. The exhaust gases are cleaned by a diesel particulate filter arranged close to the engine with an upstream oxidation catalytic converter .
The electronic engine control was also designed for the following efficiency-increasing measures:
- Start-stop system
- intelligent generator control for brake energy recovery
- needs-based control of ancillary equipment
- Shift Indicator
Variants
| Engine | Displacement | Compression Ratio | Power | Torque |
|---|---|---|---|---|
| N47D16 | 1.6 L (1598 cc/98 in³) | 16.5:1 | 70 kW (95 bhp) @ 4000 rpm | 235 N m (173 lb ft) @ 1500 - 2750 rpm |
| 85 kW (116 bhp) @ 4000 rpm | 260 N m (192 lb ft) @ 1750 - 2500 rpm | |||
| N47D20 | 2.0 L (1995 cc/121 in³) | 16.5:1 | 85 kW (116 bhp) @ 4000 rpm | 260 N m (192 lb ft) @ 1750 rpm |
| 105 kW (143 bhp) @ 4000 rpm | 300 N m (221 lb ft) @ 1750-3000 rpm | |||
| 120 kW (163 bhp) @ 4000 rpm | 340 N m (265 lb ft) @ 2000 rpm | |||
| 130 kW (177 bhp) @ 4000 rpm | 350 N·m (258 lb ft) @ 1750-3000 rpm | |||
| 135 kW (184 bhp) @ 4000 rpm | 380 N·m (280 lb ft) @ 1750-2750 rpm | |||
| 16.1:1 | 150 kW (204 bhp) @ 4400 rpm | 400 Nm (295 lb ft) @ 2000 rpm | ||
| 16.5:1 | 160 kW (218 bhp) @ 4400 rpm | 450 Nm (332 lb ft) @ 1500-2500 rpm |
| engine type | capacity | Bore × stroke | Power at 1 / min | Torque at 1 / min | Fuel injection | year |
|---|---|---|---|---|---|---|
| N47D16 | 1.6 l (1598 cm 3 ) | 78 mm × 83.6 mm | 70 kW (95 hp) at 4000 | 235 Nm at 1500-2750 | - | since 09/2012 |
| 85 kW (116 hp) at 4000 | 260 Nm at 1750-2500 | - | since 2012 | |||
| N47D20 | 2.0 l (1995 cm 3 ) | 84 mm × 90 mm | Solenoid injectors (1600 bar) | since 2009 | ||
| 105 kW (143 hp) at 4000 | 300 Nm at 1750-2500 | since 2007 | ||||
| 320 Nm at 1750-2500 | since 2010 | |||||
| 350 Nm at 1750-2750 | 2009-2010 | |||||
| 360 Nm at 1750-2500 | since 2012 | |||||
| 120 kW (163 hp) at 3250-4200 [1] | 350 Nm at 1750-2500 | Piezo injectors (1800 bar) [3] | since 2007 | |||
| 120 kW (163 hp) at 4200 [1] | 380 Nm at 1750-2750 | since 2010 | ||||
| 120 kW (163 hp) at 3250-4200 [2] | since 2010 | |||||
| 130 kW (177 hp) at 4000 | 350 Nm at 1750-3000 | since 2007 | ||||
| 145 kW (197 hp) at 4000 [3] | 390 Nm at 2000-2500 | since 2007 | ||||
| 135 kW (184 hp) at 4000 | 380 Nm at 1900-2750 | 03 / 2010-09 / 2010 | ||||
| 380 Nm at 1750-2750 | since 09/2010 | |||||
| 147 kW (200 hp) at 4000 [3] | 420 Nm at 1750-2750 | since 09/2010 | ||||
| 150 kW (204 hp) at 4400 | 400 Nm at 2000-2250 | Piezo injectors (2000 bar) | since 2007 | |||
| 160 kW (218 hp) at 4400 | 450 Nm at 1500-2500 | Piezo injectors (2000 bar) | since 2011 |
- ↑ Edition Fleet
- ↑ Efficient Dynamics Edition
- ↑ with Performance Power Kit BMW offers power kits from BMW Performance for some models for these diesel engines. This is possible with the models 120d (E81, E82, E87, E88) and 320d (E90, E91, E92, E93) with 177 hp, which make 197 hp (145 kW) after the revision. The maximum torque increases by 40 to 390 Newton meters. From March 2010, the power kit will also be available for the ex-factory 184 hp (135 kW) expansion of the N47, which will provide 200 hp (147 kW) after the revision. The maximum torque increases by 40 to 420 Newton meters.
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.
115 bhp 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
MINI diesel engine specification
| Engine Size | 1995cc |
|---|---|
| Cylinders | 4 |
| Valves | 16 |
| Fuel Type | Diesel |
| Power | 140 bhp |
|---|---|
| Top Speed | 134 mph |
| 0-60 mph | 7.6 secs |
| Torque | 305 Nm, 225 ft-lb |
| CO2 Emissions | 114 g/km |
| Euro Emissions Standard | 5 |
The 143 bhp model was used in the
- E81, E82, E87 and E88 118d
- E90 and E91 318d
- F20 118d
- F30 and F31 318d
- E84 X1 sDrive18d and xDrive18d
- 2010–present MINI Countryman Cooper SD (R60)
- 2010–present MINI Cooper SD (R56)
- 2010–present MINI Cabrio Cooper SD (R57)
- 2010–present MINI Coupe Cooper SD (R58)
- 2012–present MINI Roadster Cooper SD (R59)
- 2013–present MINI Paceman Cooper SD (R61)
- 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
This version was used in the E90 BMW 320d Efficient Dynamics
177 bhp version
BMW X3 xDrive20d. engine specification
| Engine Size | 1995cc |
|---|---|
| Cylinders | 4 |
| Valves | 16 |
| Fuel Type | Diesel |
| Power | 174 bhp |
|---|---|
| Top Speed | 128 mph |
| 0-60 mph | 8.6 secs |
| Torque | 350 Nm, 258 ft-lb |
| CO2 Emissions | 172 g/km |
| Euro Emissions Standard | 5 |
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.
The updated version of this engine introduced in March 2010 produces 135 kW/184 hp@4000 rpm and 380 Nm@1750-2750 rpm.
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 is the engine, which won the International Engine of the Year Award 2010.
Timing chain problems
The N47 engine family is prone to excessive timing chain wear and premature failure.Rattling noise from the rear of the engine is indicative of the condition. Timing chain failure may call for engine replacement or a costly repair. The issue applies to all applications and power variants of the engine produced from 01.03.2007 to 01.03.2013. The most seriously affected units which require the most extensive repairs were produced from 01.03.2007 to 05.01.2009.
Other issues
The return spring on the turbo's waste-gate was not originally lubricated or covered, this frequently resulted in early failure causing the waste-gate to remain partially or fully open. With the subsequent loss in compression, fuel consumption increased by 30%-50%. The problem was described by BMW engineers as a "known fault" and was immediately repaired (BMW mobile engineers even carried boxes of an improved spring), however BMW refused to compensate customers for the excessive fuel consumption and denied this fault was their liability.
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