BMW N47

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BMW N47D20

The N47 is a turbocharged inline four-cylinder diesel engine from the car manufacturer BMW . Completely redeveloped, it appeared in 2007 and replaced the predecessor M47 . Since 2014 it has been successively replaced by its successor, the B47 .

construction

The engine has an aluminum crankcase with thermally joined gray cast iron liners. To improve the running smoothness, two balance shafts with needle bearings are integrated in the crankcase (not in the 85 kW variant in the 116d). The four-valve cylinder head has two overhead camshafts that operate the valves via roller rocker arms. The common rail injection system in the N47 operates with pressures of 1600 to 2000 bar. 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 guide vanes is installed; the most powerful expansion stages (150 kW or 160 kW) have two turbochargers that work 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 measures to increase efficiency:

  • Automatic start-stop
  • intelligent generator control for braking energy recovery
  • needs-based regulation of ancillary units
  • Switching point display

Performance kits

For some models, BMW offers Power Kits from BMW Performance 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 after the revision produce 197 hp (145 kW). The maximum torque increases by 40 to 390 Newton meters. From March 2010, the Power Kit will also be available for the 184 hp (135 kW) ex-works version of the N47, which after the revision has an output of 200 hp (147 kW). The maximum torque increases by 40 to 420 Newton meters.

Data

Engine type Displacement 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 valve 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) with 3250–4200 350 Nm at 1750-2500 Piezo injectors (1800 bar) since 2007
120 kW (163 hp) at 4200 380 Nm at 1750-2750 since 2010
120 kW (163 hp) with 3250–4200 since 2010
130 kW (177 hp) at 4000 350 Nm at 1750-3000 since 2007
145 kW (197 hp) at 4000 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 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
  1. ↑ a b Edition Fleet
  2. ↑ EfficientDynamics Edition
  3. ↑ a b with Performance Power Kit

use

1.6l 70 kW (95 PS), 235 Nm

1.6l 82 kW (112 PS), 270 Nm

1.6l 85 kW (116 PS), 260 Nm

  • 116d EDE ( F20 )

2.0l 85 kW (116 PS), 260 Nm

2.0l 105 kW (143 PS), 300 Nm

2.0l 105 kW (143 PS), 320 Nm

  • Toyota Avensis 2.0 D-4D
  • Toyota Rav4 2.0 D-4D
  • 118d ( F20 )
  • 218d ( F22 )
  • 318d ( E90 / E91 , F30 / F31 )
  • 418d ( F36 )
  • X1 18d ( E84 )
  • Mini Cooper SD (Coutryman R60)

2.0l 105 kW (143 PS), 350 Nm

  • X3 1.8d ( E83 )

2.0l 105 kW (143 PS), 360 Nm

  • X3 sDrive 18d ( F25 )
  • 518d ( F10 )

2.0l 120 kW (163 hp), 350 Nm

  • 320d Fleet Edition ( E90 / E91 )
  • 520d Fleet Edition ( E60 / E61 )

2.0l 120 kW (163 hp), 380 Nm

  • 320d EfficientDynamics Edition ( E90 / E91 )
  • 320d Fleet Edition ( E90 / E91 )
  • X1 sDrive20d EfficientDynamics Edition ( E84 )

2.0l 130 kW (177 PS), 350 Nm

2.0l 135 kW (184 PS), 380 Nm

2.0l 150 kW (204 PS), 400 Nm

2.0l 160 kW (218 PS), 450 Nm

Problems with the timing chain

The timing chain of the N47 engine family is considered to be prone to excessive wear. This can lead to a premature failure. The result can be serious damage to the engine. The problem affects all engines of the N47 series and all performance variants up to the production date September 1, 2013. A lengthening of the timing chain is often indicated by a distinct rattle. We recommend checking and, if necessary, replacing the timing chain from a mileage of 100,000 km. To do this, however, the engine must be removed because the timing chain is installed on the transmission side. At the beginning of 2014, the goodwill regulation on the part of BMW was extended to 8 years and 200,000 km, as the number of complaints from customers and workshops increased. As with the 2008 change, the goodwill regulation means that the engine is restored to a repairable condition and not replaced. The change to goodwill only takes place in the event of irreparable engine damage within a period of 25 months after purchase or for vehicles not older than 8 years and 200,000 km mileage.

Euro 5 update

From September 2018, the KBA sent letters about the Euro 5 software update, mostly BMW models with N47D20 engines built from 2010 onwards. This is intended to reduce nitrogen oxide (NOx) emissions. As of November 2018, around 2 million vehicles have received the update. The changes affect the exhaust gas recirculation .

Awards

  • "International Engine of the Year Award 2008", category "Best New Engine"
  • "International Engine of the Year Award 2010", category "1.8-liter to 2-liter"
  • "International Engine of the Year Award 2011", category "1.8-liter to 2-liter"

literature

  • Mattes, Nefischer , Steinmayr, Steinparzer: The new four-cylinder diesel engine from BMW. Part 1: Concept, mechanics and mixture formation. In: MTZ . Volume 11, 2007, pp. 932-943.
  • Mattes, Nefischer, Steinmayr, Steinparzer: The new four-cylinder diesel engine from BMW. Part 2: Function and vehicle results. In: MTZ. Volume 12, 2007, pp. 1080-1084.

Individual evidence

  1. ↑ bimmertoday.de
  2. ↑ 7-forum.com
  3. ↑ auto-innovations.com
  4. ^ Watchdog - BMW deny engine failures are due to manufacturing fault - BBC One. In: BBC. Retrieved May 11, 2016 .
  5. ↑ BMW Service Bulletin. (PDF) Retrieved May 11, 2016 .
  6. ↑ BMW Efficient Dynamics: Diesel software update. Accessed December 22, 2018 (German).
  7. ↑ www.Motor-talk.de Software update BMW Diesel Euro-5. Retrieved December 22, 2018 .
  8. ↑ 2008 Winners. ( Memento from May 27, 2012 in the web archive archive.today )
  9. ↑ International engine of the year 2010. ( Memento from September 13, 2012 in the web archive archive.today )
  10. ↑ International engine of the year 2011. ( Memento from February 5, 2013 in the web archive archive.today )