| Mitsubishi 4N1 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mitsubishi Motors |
| Production | 2010–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 material | Aluminium 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 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 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.
