Nissan MR engine

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Nissan MR engine
Overview
Manufacturer Nissan Motors
Production 2004-
Combustion chamber
Configuration I4
Displacement 1.6L
1.8L
2.0L
Valvetrain DOHC
Combustion
Fuel system Fuel injection
Fuel type Gasoline (all except M9R)
Diesel (M9R)
MR20DE

The MR is a family of straight-4 all-aluminum 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.

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.

MR16DDT[edit]

The MR16DDT is a 1.6 L (1618 cc) DIG-T (Direct Injection Gasoline Turbo-charged) engine, bore is 79.7 mm (3.14 in) and stroke is 81.1 mm (3.19 in). It was first introduced in the Nissan Juke small SUV in the autumn of 2010. Output is 188 hp (140 kW) and 177 lb·ft (240 N·m).

MR16DDT

Some of the pertinent features of the MR16DDT are:

  • Twin variable valve timing control (CVTCS on intake and exhaust valves)
  • Turbo-charged and intercooled
  • Compression ratio of 9.5:1
  • Light weight design and reduced frictions

Applications:

MR18DE[edit]

The MR18DE is a 1.8 L (1798 cc) version, bore is 84.0 mm (3.31 in) and stroke is 81.1 mm (3.19 in). It produces 130 hp (97 kW) .

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

On July 6, 2006 this engine is also fitted to Nissan Livina Geniss for China version and Nissan GRAND LIVINA for Indonesia and Malaysia version. Output is 126 hp (94 kW) at 5,200 rpm and 174 N·m (128 lb·ft) at 4,800 rpm.

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

Applications:

MRA8DE[edit]

MRA8DE

The MRA8DE is a 1.8 L (1798 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 is 79.7 mm (3.14 in) and stroke is 90.1 mm (3.55 in). It produces 130 hp (97 kW) at 6,000rpm and 174 N·m (128 lb·ft) at 3,600rpm, and has a compression ratio of 9.9:1.

Applications:

MR20DE[edit]

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 being 84.0 mm (3.31 in) and stroke 90.1 mm (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) 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 hp (104 kW) at 5100 rpm and 193 N·m (142 lb·ft) at 4800 rpm. Middle East version of the MR20DE engine that goes in the Nissan Qashqai produces 137 hp (102 kW) at 5200 rpm and 198 N·m (146 lb·ft) at 4400 rpm.

Applications:

MR20DD[edit]

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 hp (110 kW) at 5,600 rpm and 155 lb·ft (210 N·m) of torque at 4,400 rpm.[2] [Export markets: 137 hp (102 kW) at 5,200 rpm and 147 lb·ft (199 N·m) at 4,400 rpm]

Applications:

M9R dCi[edit]

M9R Turbo Diesel Engine
Nissan M9R engine
Nissan M9R Engine 02.JPG
Overview
Manufacturer Nissan
Also called 2.0 dCi
Production 2006-present
Combustion chamber
Configuration I4
Displacement 1,995 cc (121.7 cu in)
Cylinder bore 84.0mm
Piston stroke 90.0mm
Cylinder block alloy cast iron
Valvetrain DOHC/4 valves per cylinder
Compression ratio 15.6:1
Combustion
Turbocharger Yes
Fuel system Common rail Direct Injection
Fuel type Diesel
Output
Power output 130–180 PS (96–132 kW; 130–180 hp)
Torque output 320–400 N·m (240–300 lb·ft)
Chronology
Predecessor -

The M9R is a family of straight-4 automobile Diesel engines featuring a cast-iron block, co-developed by Renault and Nissan. Renault calls it the M engine. Other features of the engine are a double overhead camshaft, 16-valve layout and a silent timing chain.

The engine is available in the 150 PS (110 kW) tune in Nissan Qashqai, Nissan X-Trail, Renault Mégane, Renault Koleos and Renault Laguna models. In this trim the engine achieves maximum power at 4,000 rpm and maximum torque (340 N·m (250 lb·ft)) at 2,000 rpm. A 175 PS (129 kW) form with particulate filter is available in Renault Laguna and Nissan X-Trail models. A 180 PS (132 kW) variant is also available on the Laguna GT. In both engines maximum power is achieved at 3,750 rpm and maximum torque is available from 1,750rpm.

The design of the bottom end, with an aluminum bearing ladder, allows better absorption of vibration. In order to further 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) New Mégane and New Laguna respectively emitted 144 g/km and 154 g/km of CO2 and the 175 hp (127 kW) version of New Laguna 2.0 dCi emits 159 g/km of CO2; they all comply with the Euro 5 standards for exhaust emissions.

The 130 PS (96 kW) and 150 PS (110 kW) M9R engines for the Laguna were updated in 2011 to include some fuel emission optimizations:

  • Stop & Start
  • Thermal Management
  • Electrical Smart Management

They were renamed "2.0 Energy dCi". The CO2 values were thus reduced to 118 g/km for both the 2.0 Energy dCi 130 and 2.0 Energy dCi 150.

It is fitted to the following vehicles:

See also[edit]

References[edit]

  1. ^ "New Nissan X-Trail spec and engine details". 2014-03-05. Retrieved 2014-03-06. 
  2. ^ "NISSAN | Nissan Releases All-New Serena Minivan". Nissan-global.com. 2010-11-08. Retrieved 2012-01-23.