Mitsubishi 4N1 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."Environmental Highlights of the 2007 Tokyo Motor Show", Keith Hardy, .pdf file, Advanced propulsion news"Joint Development of a New Generation Diesel Engine", Mitsubishi Motors press release"Mitsubishi Motors to Bring Forward Market Introduction of Next-generation Diesel Car Engine", Mitsubishi Motors press release

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 and later announced that the engines will be gradually phased into other global markets."Mitsubishi Motors Lineup at 2007 North American International Auto Show", Mitsubishi Motors press release

The preliminary version of the engine was first seen in the Concept-cX test car introduced in 2007. The larger 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."MITSUBISHI Concept-cX", Mitsubishi Motors press release"Mitsubishi Motors lineup at the 40th Tokyo Motor Show" , Mitsubishi Motors press release"Mitsubishi Motors new "MITSUBISHI Concept-RA" to receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release"Mitsubishi Motors Lineup at 2008 North American International Auto Showto receive global premiere at 2008 Detroit Motor Show, Mitsubishi Motors press release

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.

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."Mitsubishi Motors Environment Initiative Program 2010", Mitsubishi Motors press release

The 4N1 engine family is the world's first to feature a variable valve timing (intake side) system applied to passenger car diesel engines.Mitsubishi Motors UK Geneva motor show 2010 presskit

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 high-pressure common rail injection system to improve combustion efficiency. The 4N13 uses solenoid fuel-injectors. The larger 4N14 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."Mitsubishi Reveals New Concept-cX", Mitsubishi Motors Australia press release

The 4N13 engine uses a variable geometry (VG) turbocharger with a variable vane turbine, which provides optimal boost pressure control for different driving conditions. The 4N14 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.

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.

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).

4N13

Specifications Engine type Inline 4-cylinder, DOHC 16v, MIVEC (intake) Displacement Bore x Stroke Compression ratio 14.9:1 Turbocharger Variable geometry turbocharger with intercooler Fuel systemCommon rail with solenoid injectors Peak power at 4000 rpm at 4000 rpm (low power version) Peak torque at 2000-3000 rpm

Applications 2010 Mitsubishi ASX (RVR) 2010 Mitsubishi Lancer 2012 Peugeot 4008 2012 Citroën C4 Aircross

4N14

Specifications Engine type Inline 4-cylinder, DOHC 16v, MIVEC Displacement Bore x Stroke Turbocharger Variable geometry turbocharger / variable diffuser, intercooler Fuel system Common rail with piezo injectors (CRDi) Peak power at 3500 rpm at 3500 rpm without MIVEC at 3500 rpm without MIVEC Peak torque at 2000 rpm at 1500-2750 rpm without MIVEC at 1000-3500 rpm without MIVEC

Applications Transversal: 2010 Mitsubishi Outlander 2012 Mitsubishi Delica D:5 (without variable timing, /) 2013 Mitsubishi ASX (with A/T only, without variable timing) 2017 Mitsubishi Eclipse Cross Longitudinal: 2019 Mitsubishi L300 (without variable timing, /)

4N15

Specifications Engine type Inline 4-cylinder, DOHC 16v, MIVEC Displacement Bore x Stroke Compression ratio 15.5:1 Turbocharger Variable geometry turbocharger / variable diffuser, intercooler Fuel system Common rail with electromagnetic solenoid injectors Peak power at 3,500 rpm (low power version) Peak torque at 2,500 rpm at 1,500-2,500 rpm (low power version)

Applications 2014 Fiat Fullback 2014 Mitsubishi Type 73 light truck 2015 Mitsubishi Triton/L200/Strada 2015 Mitsubishi Pajero Sport/Montero Sport/Shogun Sport

4N16

Specifications Engine type Inline 4-cylinder, DOHC 16v, MIVEC Displacement https://www.mitsubishi-motors.com/en/newsrelease/images/download/pdf/p_230726_p_1438.pdf Bore x Stroke Compression ratio 15.1–15.2:1 Turbocharger Variable geometry turbocharger / variable diffuser, intercooler Fuel system Common rail Peak power at 3,500 rpm (Bi-Turbo Sequential) at 3,500 rpm at 3,500 rpm at 3,250 rpm (Nissan Caravan/Isuzu Como) Peak torque at 1,500-2,750 rpm (Bi-Turbo Sequential) at 2,250-2,500 rpm at 1,500-3,000 rpm at 2,000 rpm (Nissan Caravan/Isuzu Como)

Applications 2022 Nissan Caravan/Isuzu Como 2023 Mitsubishi Triton/L200 2026 Nissan Navara 2024 Mitsubishi Pajero Sport 2026 Mitsubishi Pajero

Mitsubishi 4N1 engine

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