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Mitsubishi 4N1 engine

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4N1
Overview
ManufacturerMitsubishi Motors
Production2010–present
Layout
Cylinder block materialAluminium die cast
Cylinder head materialAluminium die cast
ValvetrainDOHC, 16 valves, variable valve timing MIVEC (intake)
Combustion
Turbochargervariable geometry turbocharger, intercooler
Fuel systemcommon rail injection

The Mitsubishi 4N1 engine is a family of all-alloy four-cylinder diesel engines developed by Mitsubishi Motors, produced at the company's powertrain facility in Kyoto, Japan for use in Mitsubishi's small to mid-sized global passenger cars.[1][2][3]

In June 2006, Mitsubishi Motors and Mitsubishi Heavy Industries announced a joint development project for a new generation of clean diesel engines to be used in cars exported to Europe with a target of beginning mass production in 2010[2] and later announced that the engines will be gradually phased into other global markets.[3][4]

The preliminary version of the 1798 cc engine was first seen in the Concept-cX test car introduced in 2007. The larger 2268 cc was first exhibited in the Concept-ZT test car introduced in the same year and later used in the Concept-RA test car introduced in 2008.[5][6][7][8]

With a clean diesel emission performance in mind, all engines are designed to comply with Tier 2 Bin 5 emission regulations in the United States, Euro 5 standard in Europe and Japan's Post New Long Term regulations.[1][3][8]

Together with Mitsubishi's electric vehicle technology the new diesel engines are positioned as a core element in the Mitsubishi Motors Environment Initiative Program 2010 (EIP 2010) announced in July 2006.[3][9]

The 4N1 engine family is the world's first to feature a variable valve timing (intake side) system applied to passenger car diesel engines.[10]

All engines developed within this family have aluminum cylinder block, double overhead camshaft layouts, four valves per cylinder, a common rail injection system with a variable geometry turbocharger and MIVEC variable valve timing.

Engine family characteristics

Mitsubishi's new clean diesel engines use a 200 MPa (2,000 bar) high-pressure common rail injection system to improve combustion efficiency. The 4N13 1.8-liter uses solenoid fuel-injectors. The larger 4N14 2.3-liter engine uses piezo fuel-injectors that produce a finer fuel spray. Both engines feature a fast ceramic glowplug system. The engines are designed to operate at a lower compression ratio, thus lowering the combustion pressure, allowing the use of an aluminium cylinder block that reduces weight.[1][11]

The 4N13 1.8-liter engine uses a Variable Geometry (VG) turbocharger with a variable vane turbine, which provides optimal boost pressure control for different driving conditions. The 4N14 2.3-liter engine also uses a VG turbocharger plus a Variable Diffuser (VD) that uses both variable geometry vanes in the turbine housing and a compressor with variable vanes in the diffuser passage, further improving combustion efficiency.[1][11]

Within the engine, Mitsubishi used an offset angle crankshaft that reduces friction, therefore noise and vibration, allowing the engine to run smoothly and quietly at all engine speeds.[1][11]

To meet the requirements of global emissions standards, Mitsubishi developed a new catalyst system that combines a Diesel Oxidation Catalyst (DOC), NOx Trap Catalyst (NTC) and Diesel Particulate Filter (DPF).[1][11]

4N13

Specifications

Engine type Inline 4-cylinder, DOHC 16v, MIVEC (intake)
Displacement 1.8 L (1798 cc)
Bore 83 mm
Stroke 83.1 mm
Compression ratio 14.9:1 
Turbocharger variable geometry turbocharger, intercooler
Fuel system Common rail with solenoid injectors
Peak power 110 kW (150 PS) at 4000 rpm
85 kW (116 PS) at 4000 rpm (low power version)
Peak torque 300 N⋅m (221 lb⋅ft) at 2000-3000 rpm

Applications

4N14

Specifications

Engine type Inline 4-cylinder, DOHC 16v, MIVEC
Displacement 2.3 L (2268 cc)
Bore 86 mm
Stroke 97.6 mm
Turbocharger variable geometry turbocharger / variable diffuser, intercooler
Fuel system Common rail with piezo injectors
Peak power 130 kW (177 PS) at 3500 rpm [12]
Peak torque 380 N⋅m (280 lb⋅ft) at 2000 rpm

Applications

4N15

Specifications

Engine type Inline 4-cylinder, DOHC 16v, MIVEC
Displacement 2.4 L (2442 cc)
Bore 86 mm
Stroke 105.1 mm
Compression ratio 15,5 : 1
Turbocharger variable geometry turbocharger / variable diffuser, intercooler
Fuel system Common rail with piezo injectors
Peak power 133 kW (181 PS) at 3500 rpm [13]
Peak torque 430 N⋅m (317 lb⋅ft) at 2500 rpm

Applications

See also

References

  1. ^ a b c d e f "Environmental Highlights of the 2007 Tokyo Motor Show", Keith Hardy, .pdf file, Advanced propulsion news
  2. ^ a b "Joint Development of a New Generation Diesel Engine", Mitsubishi Motors press release
  3. ^ a b c d "Mitsubishi Motors to Bring Forward Market Introduction of Next-generation Diesel Car Engine", Mitsubishi Motors press release
  4. ^ "Mitsubishi Motors Lineup at 2007 North American International Auto Show", Mitsubishi Motors press release
  5. ^ "MITSUBISHI Concept-cX", Mitsubishi Motors press release
  6. ^ "Mitsubishi Motors lineup at the 40th Tokyo Motor Show", Mitsubishi Motors press release
  7. ^ "Mitsubishi Motors new "MITSUBISHI Concept-RA" to receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release
  8. ^ a b "Mitsubishi Motors Lineup at 2008 North American International Auto Showto receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release
  9. ^ "Mitsubishi Motors Environment Initiative Program 2010", Mitsubishi Motors press release
  10. ^ Mitsubishi Motors UK Geneva motor show 2010 presskit
  11. ^ a b c d "Mitsubishi Reveals New Concept-cX", Mitsubishi Motors Australia press release
  12. ^ http://www.mitsubishi-motors.at/uploadedFiles/Parent_Site/Models_Data/Explores_Files/OutlanderMY2010/Datenblatt%20Outlander.pdf
  13. ^ http://mitsubishimotors-triton.com/images/Triton-Spec.jpg
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