Mitsubishi 4N1 engine

Last updated
Mitsubishi 4N1 engine
Mitsubishi 4N14 engine.jpg
Overview
Manufacturer Mitsubishi Motors
Production2010–present
Layout
Configuration 4-cylinder
Displacement 1.8–2.4  L (1,798–2,442  cc)
Cylinder bore 83  mm (3.27  in)
86 mm (3.39 in)
Piston stroke 83.1 mm (3.27 in)
97.6 mm (3.84 in)
105.1 mm (4.14 in)
Cylinder block material Aluminium die cast
Cylinder head materialAluminium die cast
Valvetrain DOHC, 16 valves, variable valve timing MIVEC (intake)
Compression ratio 14.9:1-15.5:1
Combustion
Turbocharger Variable geometry
with intercooler
Fuel system Common rail direct injection
Fuel type Diesel
Cooling system Water-cooled
Output
Power output 85–150  kW (116–204  PS)
Torque output 300–470  N⋅m (221–347  lb⋅ft)
Chronology
Predecessor Mitsubishi Sirius engine (Diesel Engine)

The Mitsubishi 4N1 engines are 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]

Contents

In June 2006, Mitsubishi Motors Mitsubishi Heavy Industries and Renault 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 1.8 L (1,798 cc) engine was first seen in the Concept-cX test car introduced in 2007. The larger 2.3 L (2,268 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 aluminium cylinder block, double overhead camshaft layouts, 4 valves per cylinder, a common rail injection system with a variable-geometry turbocharger. Most of those engine have the MIVEC variable valve timing system. The 4N14 2.3 L (2,268 cc) has been distributed in the ASX and Delica without MIVEC .

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 4N131.8 L (1,798 cc) uses solenoid fuel-injectors. The larger 4N142.3 L (2,268 cc) 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 4N131.8 L (1,798 cc) engine uses a Variable Geometry (VG) turbocharger with a variable vane turbine, which provides optimal boost pressure control for different driving conditions. The 4N142.3 L (2,268 cc) 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 typeInline 4-cylinder, DOHC 16v, MIVEC (intake)
Displacement1.8 L (1,798 cc)
Bore x Stroke83 mm × 83.1 mm (3.27 in × 3.27 in)
Compression ratio14.9:1 
Turbochargervariable geometry turbocharger with intercooler
Fuel system Common rail with solenoid injectors
Peak power110 kW (150 PS) at 4000  rpm
85 kW (116 PS) at 4000 rpm (low power version)
Peak torque300 N⋅m (221 lb⋅ft) at 2000-3000 rpm

Applications

4N14

Specifications

Engine typeInline 4-cylinder, DOHC 16v, MIVEC
Displacement2.3 L (2,268 cc)
Bore x Stroke86 mm × 97.6 mm (3.39 in × 3.84 in)
Turbochargervariable geometry turbocharger / variable diffuser, intercooler
Fuel systemCommon rail with piezo injectors (CRDi)
Peak power130 kW (177 PS; 174 hp) at 3500 rpm [12]
110 kW at 3500 rpm without MIVEC [13]
Peak torque380 N⋅m (280 lb⋅ft) at 2000 rpm
360 N⋅m (266 lb⋅ft) at 1500-2750 rpm without MIVEC

Applications

4N15

Mitsubishi 4N15 High Power engine Mitsubishi 4N15 engine.jpg
Mitsubishi 4N15 High Power engine

Specifications

Engine typeInline 4-cylinder, DOHC 16v, MIVEC
Displacement2.4 L (2,442 cc)
Bore x Stroke86 mm × 105.1 mm (3.39 in × 4.14 in)
Compression ratio15.5:1
Turbochargervariable geometry turbocharger / variable diffuser, intercooler
Fuel systemCommon rail with electromagnetic solenoid injectors
Peak power133 kW (181 PS) at 3,500 rpm [15]
Peak torque430 N⋅m (317 lb⋅ft) at 2,500 rpm

Applications

4N16

Mitsubishi 4N16 High Power engine Mitsubishi 4N16 engine.jpg
Mitsubishi 4N16 High Power engine

Specifications

Engine typeInline 4-cylinder, DOHC 16v, MIVEC
Displacement2.4 L (2,439 cc)
Bore x Stroke86 mm × 105 mm (3.39 in × 4.13 in)
Compression ratio15.1–15.2:1
Turbochargervariable geometry turbocharger / variable diffuser, intercooler
Fuel systemCommon rail
Peak power97–150 kW (132–204 PS) at 3,250–3,500 rpm
Peak torque330–470 N⋅m (243–347 lb⋅ft) at 1,500–3,000 rpm

Applications

See also

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