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The MR is a family of straight-four all-aluminium automobile engines with variable valve timing co-developed by Renault and Nissan. Renault calls it the M engine. Other noteworthy features of this engine family include acoustically equal runner lengths and a tumble control valve for the intake manifold, a "silent" timing chain, mirror finished crankshaft and camshaft journals, and offset cylinder placement for an attempt in increased efficiency.

Nissan MR engine
MR20DE.jpg
MR20DE
Overview
ManufacturerNissan Motors & Renault
Production2004–
Layout
ConfigurationInline 4
Displacement1.6 L (1618 cc)
1.8 L (1797 cc)
2.0 L (1997 cc)
Cylinder bore79.7 mm (3.14 in)
84 mm (3.31 in)
Piston stroke81.1 mm (3.19 in)
90.1 mm (3.55 in)
Block materialAluminum alloy
Head materialAluminum alloy
ValvetrainDOHC 4 valves x cyl. with VVT
Compression ratio9.5:1, 9.9:1
Combustion
TurbochargerIn some versions
Fuel systemFuel injection
Direct injection
Fuel typeGasoline (all except M9R / M9T)
Diesel (M9R / M9T)
Cooling systemWater-cooled
Output
Power output188–300 bhp (191–304 PS; 140–224 kW)
Torque output240–285 N⋅m (177–210 lb⋅ft)
Chronology
PredecessorNissan SR engine

The MR engine family features 'under stress' manufacture, meaning while the block is being bored, a torque plate puts the block under stress. The block becomes temporarily distorted until the head is torqued onto it, at which point the block is pulled into the correct shape.

MR16DDTEdit

The MR16DDT is a 1.6 L (1618 cc) DIG-T (Direct Injection Gasoline-Turbocharged) inline-four engine, with a bore x stroke of 79.7 mm × 81.1 mm (3.14 in × 3.19 in). It was first introduced in the Nissan Juke small SUV in the autumn of 2010. Output is 188 bhp (191 PS; 140 kW) and 240 N⋅m (177 lb⋅ft) of torque. The 2014 Juke RS NISMO produced 215 bhp (218 PS; 160 kW) and 285 N⋅m (210 lb⋅ft). In 2015 Nissan Teana use 1.6 Turbo as replacement of the old 2.0 engine.

 
MR16DDT

Some of the pertinent features of the MR16DDT are:

Applications:

MR18DEEdit

The MR18DE is a 1.8 L (1798 cc) version, bore and stroke is 84 mm × 81.1 mm (3.31 in × 3.19 in). It produces 130 PS (96 kW; 128 hp).

In America the output is 122 hp (91 kW; 124 PS) at 5500 rpm and 174 N⋅m (128 lb⋅ft) at 4800 rpm.

From July 6, 2006 this engine is also fitted to Nissan Livina Geniss for China version and the Nissan Grand Livina for Indonesia and Malaysia. Output is 126 PS (93 kW; 124 hp) at 5200 rpm and 174 N⋅m (128 lb⋅ft) at 4800 rpm.

For Brazil, this engine is fitted to the Tiida and Livina ranges, with Flex-fuel capability.

Applications:

MRA8DEEdit

 
MRA8DE engine

The MRA8DE is a 1.8 L (1797 cc) engine, different from the MR18DE as it has a twin variable valve timing system on both the intake and exhaust valves and uses a diamond-like carbon coating. Bore and stroke is 79.7 mm × 90.1 mm (3.14 in × 3.55 in). It produces 130 PS (96 kW; 128 hp) at 6000 rpm and 174 N⋅m (128 lb⋅ft) at 3600 rpm, and has a compression ratio of 9.9:1.

Applications:

MR20DEEdit

 
MR20DE installed (as an M4R) in a Renault Clio III

The MR20DE, a 2.0 L (1997 cc) engine was the first MR series engine developed by Nissan as a replacement for the QR20DE. It is an undersquare engine, its bore and stroke being 84 mm × 90.1 mm (3.31 in × 3.55 in). It was first introduced in the Lafesta and Serena MPVs and Renault Samsung SM5 in early 2005. In November 2006, it entered Renault's lineup in the Clio III as the M4R, where it generates 138 PS (101 kW; 136 hp).

This engine is available with Nissan's XTRONIC CVT continuously variable transmission in several applications.

A detuned version, with 133 PS (98 kW; 131 hp) instead of 137 PS (101 kW; 135 hp), was added to the new Bluebird Sylphy in late 2006. In the new Nissan X-Trail, Qashqai and C-Platform Sentra the MR20DE produces 140 PS (103 kW; 138 hp) at 5100 rpm and 193 N⋅m (142 lb⋅ft) of torque at 4800 rpm. Middle East version of the MR20DE engine that goes in the Nissan Qashqai produces 137 PS (101 kW; 135 hp) at 5200 rpm and 198 N⋅m (146 lb⋅ft) of torque at 4400 rpm.

Applications:

MR20DDEdit

 
MR20DD Engine

The MR20DD is a 2.0 L (1997 cc) engine developed by Nissan with direct injection and twin variable valve timing control. The MR20DD engine is "SU-LEV" certified in Japan, and produces 147 PS (108 kW; 145 hp) at 5600 rpm and 155 lb⋅ft (210 N⋅m) of torque at 4400 rpm.[2] Export models claim 137 hp (102 kW; 139 PS) at 5200 rpm and 147 lb⋅ft (199 N⋅m) at 4400 rpm]

The Australian & New Zealand markets Nissan Qashqai ST and Ti models use a variant of the MR20DD which achieves 106 kW (142 hp; 144 PS) at 6000 rpm and 200 N⋅m (148 lb⋅ft) at 4400 rpm.[3][4]

Applications:

MR20DD HybridEdit

The MR20DD Hybrid is a 2.0 L (1997 cc) Hybrid engine developed by Nissan with direct injection and twin variable valve timing control. The MR20DD Hybrid engine is "SU-LEV" certified in Japan, and produces 144 PS (106 kW; 142 hp) at 6000 rpm and 147 lb⋅ft (199 N⋅m) of torque at 4400 rpm. with Synchronous Electric Motor produces 41 PS (30 kW; 40 hp) and 118 lb⋅ft (160 N⋅m) of torque and Lithium-Ion battery, for a combined power of 179 PS (132 kW; 177 hp).

Applications:

M9 DieselEdit

The M9R and M9T are a family of straight-four automobile Diesel engines co-developed by Nissan and Renault, the latter call them the M engines. Following Renault's designation plan the last letter (M9R resp. M9T) is to indicate the swept volume of 2.0 l resp. 2.3 litres. Although its similar names, the diesels are only loosely related to the MR gasoline engines.

Features of the diesel engines include a cast-iron block, aluminium alloy cylinder head with double overhead camshafts, 16-valve layout and a bushes timing chain. The M9T is directed to heavier vehicles like the Nissan Navara or the Renault Master. It features a bore and stroke of85 mm × 101.3 mm (3.35 in × 3.99 in) for a total displacement of 2,299 cc (2.3 L), balancer shafts,[5] typical speeds are 3500 rpm for maximum power and 1250 rpm for maximum torque.

Low output versions of the M9R for the Renault Trafic II at 66 and 85 kW (90 and 116 PS; 89 and 114 hp) had been replaced by the Renault R engine with the introduction of the Trafic III, while versions starting from 96 kW (131 PS; 129 hp) include VNT chargers. The top version of the Navara utilizes the M9T with twin-turbochargers and 140 kW (190 PS; 188 hp). During production period engines had been updated up to Euro 6 (in early 2017).

M9R dCiEdit

 
M9R Turbo Diesel Engine
Nissan M9R engine
 
Overview
ManufacturerNissan & Renault
Also called2.0 dCi
Production2006-present
Layout
ConfigurationInline-four
Displacement2.0 L (1995 cc)
Cylinder bore84 mm (3.31 in)
Piston stroke90 mm (3.54 in)
Block materialCast iron
Head materialAluminium alloy
ValvetrainDOHC 4 valves per cylinder
Compression ratio15.6:1
Combustion
TurbochargerYes
Fuel systemCommon rail Direct Injection
Fuel typeDiesel
Cooling systemWater-cooled
Output
Power output130–180 PS (96–132 kW; 130–180 hp)
Torque output320–400 N⋅m (240–300 lb⋅ft)
Chronology
PredecessorRenault F-Type engine

The M9R is available in the 150 PS (110 kW; 148 hp) tune in Nissan Qashqai, Nissan X-Trail, Renault Mégane, Renault Koleos and Renault Laguna models. In this trim the engine achieves maximum power at 4000 rpm and maximum torque of 340 N⋅m (251 lb⋅ft) at 2000 rpm. A 175 PS (129 kW; 173 hp) form with particulate filter is available in Renault Laguna and Nissan X-Trail models. A 180 PS (132 kW; 178 hp) variant is also available on the Laguna GT. In both engines maximum power is achieved at 3750 rpm and maximum torque is available from 1750 rpm.

In order to reduce vibrations, balance shafts are included in some versions of the engine. The 2.0 dCi engine in all its versions complies with the Euro 4 and 5 standards for exhaust emissions. The 150 PS (110 kW; 148 hp) New Mégane and New Laguna respectively emitted 144 g (5.1 oz)/km and 154 g (5.4 oz)/km of CO2 and the 129 kW (175 PS; 173 hp) version of New Laguna 2.0 dCi emits 159 g (5.6 oz)/km of CO2; they all comply with the Euro 5 standards for exhaust emissions.

In 2011 the 96 and 110 kW (131 and 150 PS; 129 and 148 hp) M9R engines has been updated with an optional package to lower exhaust emissions (Euro5) and fuel consumption. These engines are tagged "2.0 Energy dCi 130" resp. "2.0 Energy dCi 150", typically maximum power is available at 3750 rpm and maximum torque at a minimum of 1750 rpm. The package comprises:

  • Stop & Start
  • Active thermal management
  • Smart electrical management
  • Variable capacity oil pump

The CO2 values were thus reduced to 118 g (4.2 oz)/km for the Laguna both the 2.0 Energy dCi 130 and 2.0 Energy dCi 150.

The engine is fitted to the following vehicles:

See alsoEdit

ReferencesEdit

  1. ^ "New Nissan X-Trail spec and engine details". March 5, 2014. Retrieved September 28, 2017.
  2. ^ "NISSAN | Nissan Releases All-New Serena Minivan". Nissan-global.com. November 8, 2010. Retrieved September 28, 2017.
  3. ^ "All-New Nissan Qashqai Now on Sale in Audtralia". July 14, 2014. Retrieved September 28, 2017.
  4. ^ Nissan Qashqai Specifications Retrieved September 28, 2017.
  5. ^ http://www.powertrain.renault.com/application/storage/upload/filemanager/brochure/brochure_engine_new/Brochure_2000_dCi_MAJ_2014.pdf