Mitsubishi 4N1 engine
| Company type | Engine series |
|---|---|
| Industry | Automotive |
| Founded | June 2006 (joint venture initiation) |
| Founder | Mitsubishi Motors, Mitsubishi Heavy Industries, Renault (joint venture) |
| Headquarters | Kyoto , Japan |
| Products | Inline-4 diesel engines |
| Parent | Mitsubishi Motors |
The Mitsubishi 4N1 engine series represents a lineup of entirely alloy inline-4 diesel engines engineered by Mitsubishi Motors. These powertrains are manufactured at Mitsubishi's Kyoto facility and are designed for compact to mid-range passenger vehicles worldwide.
In June 2006, Mitsubishi Motors collaborated with Mitsubishi Heavy Industries and Renault to initiate a joint venture focused on developing new clean diesel engines aimed for mass production by 2010. This initiative initially targeted the European market, with intentions to expand globally thereafter.
The prototype engine was first showcased in the 2007 Mitsubishi Concept-cX, while the larger displacement variant made its debut in the 2007 Mitsubishi Concept-ZT and subsequently in the 2008 Mitsubishi Concept-RA concept vehicles.
Engineered to comply with rigorous emissions requirements—such as US Tier 2 Bin 5, Euro 5, and Japan’s Post New Long Term standards—the 4N1 series aligns with Mitsubishi’s Environment Initiative Program 2010 (EIP 2010), complementing the company’s advancements in electric vehicle technology.
These 4N1 engines are pioneering in offering intake-side variable valve timing on passenger car diesel units. Key features include aluminium cylinder blocks, DOHC architecture, four valves per cylinder, common rail direct fuel injection, and variable-geometry turbochargers. Most models incorporate Mitsubishi’s MIVEC technology, except for the 4N14 2.3-liter engine found in ASX and Delica models.
Engine family characteristics
Mitsubishi’s clean diesel powerplants utilize a high-pressure common rail injection system designed to optimize combustion efficiency. The 4N13 model is equipped with solenoid-type fuel injectors, whereas the larger 4N14 version employs piezoelectric injectors for enhanced atomization of fuel. Both engines feature rapid-response ceramic glowplugs and operate with reduced compression ratios, which lowers combustion pressures and permits the use of lightweight aluminium blocks.
The 4N13 employs a variable geometry (VG) turbocharger featuring a variable vane turbine to maintain ideal boost pressure across varying engine loads. The 4N14 further enhances performance by incorporating a variable diffuser (VD) compressor equipped with adjustable vanes, contributing to improved combustion efficiency.
An offset crankshaft design minimizes mechanical friction, noise, and vibration, ensuring smooth and quiet operation throughout the engine’s RPM range.
To meet global emissions regulations, Mitsubishi developed an integrated catalyst system that combines a Diesel Oxidation Catalyst (DOC), NOx Trap Catalyst (NTC), and Diesel Particulate Filter (DPF).
Specifications
| Engine configuration | Inline four-cylinder, DOHC 16-valve, MIVEC (intake) |
| Displacement | 1.8 L (1,798 cc) |
| Bore x Stroke | 83 mm × 83.1 mm (3.27 in × 3.27 in) |
| Compression ratio | 14.9:1 |
| Turbocharger | Variable geometry turbocharger with intercooler |
| Fuel injection system | Common rail with solenoid injectors |
| Maximum power output | 110 kW (150 PS) at 4000 rpm 85 kW (116 PS) (low output variant) |
| Maximum torque | 300 N⋅m (221 lb⋅ft) between 2000 and 3000 rpm |
Applications
- 2010 Mitsubishi ASX (RVR)
- 2010 Mitsubishi Lancer
- 2012 Peugeot 4008
- 2012 Citroën C4 Aircross
Specifications
| Engine configuration | Inline 4-cylinder, DOHC 16-valve, equipped with MIVEC |
| Engine displacement | 2.3 L (2,268 cc) |
| Cylinder bore and stroke | 86 mm × 97.6 mm (3.39 in × 3.84 in) |
| Forced induction | Variable geometry turbocharger featuring a variable diffuser and intercooler |
| Fuel delivery system | Common rail system with piezoelectric injectors (CRDi) |
| Maximum power output | 130 kW (177 PS; 174 hp) at 3500 rpm 110 kW (150 PS; 148 hp) at 3500 rpm for versions without MIVEC |
| Maximum torque | 380 N⋅m (280 lb⋅ft) at 2000 rpm 360 N⋅m (266 lb⋅ft) between 1500-2750 rpm for non-MIVEC variants |
Applications
- 2010 Mitsubishi Outlander
- 2012 Mitsubishi Delica D:5 (models lacking variable timing, /)
- 2013 Mitsubishi ASX (automatic transmission only, without variable timing)
- 2017 Mitsubishi Eclipse Cross
- 2019 Mitsubishi L300 and L200 (without variable timing, /)
Specifications
| Engine configuration | Inline 4-cylinder, DOHC 16-valve, incorporating MIVEC | ||
| Engine displacement | 2,442 cc (2.4 L) | ||
| Cylinder bore and stroke | 86 mm × 105.1 mm (3.39 in × 4.14 in) | ||
| Compression ratio | 15.5:1 | ||
| Forced induction | Variable geometry turbocharger with variable diffuser and intercooler | ||
| Fuel injection system | Common rail utilizing electromagnetic solenoid injectors | ||
| Maximum power output | 133 kW (178 hp)* at 3,500 rpm 113[convert: needs unit name] for lower power variants |
- Maximum torque |
430 N⋅m (317 lb⋅ft) at 2,500 rpm |
Applications
- 2014 Fiat Fullback
- 2014 Mitsubishi Type 73 light truck
- 2015 Mitsubishi Triton/L200/Strada
- 2015 Mitsubishi Pajero Sport/Montero Sport/Shogun Sport
Specifications
| Engine configuration | Inline 4-cylinder, DOHC 16-valve, featuring MIVEC |
| Engine displacement | 2.4 L (2,439 cc) |
| Cylinder bore and stroke | 86 mm × 105 mm (3.39 in × 4.13 in) |
| 'Compression ratio' | 'Between 15.1 and 15.2:1' |
| 'Forced induction' | 'Variable geometry turbocharger with variable diffuser and intercooler' |
| 'Fuel injection system' | 'Common rail' |
| 'Maximum power output' | '150 kW (204 PS) at 3,500 rpm 135 kW (184 PS) at 3,500 rpm 110 kW (150 PS) at 3,500 rpm 97 kW (132 PS) at 3,250 rpm (Nissan Caravan/Isuzu Como)' |
| 'Maximum torque' | '470 N⋅m (347 lb⋅ft) between 1,500-2,750 rpm 430 N⋅m (317 lb⋅ft) between 2,250-2,500 rpm 330 N⋅m (243 lb⋅ft) between 1,500-3,000 rpm 370 N⋅m (273 lb⋅ft) at 2,000 rpm (Nissan Caravan/Isuzu Como)' |
Applications
- 2022 Nissan Caravan/Isuzu Como
- 2023 (Mitsubishi Triton/L200)
- 2024 Mitsubishi Pajero Sport