| Mitsubishi 4J1 engine | |
| Manufacturer: | Mitsubishi Motors |
| Configuration: | Naturally aspirated 4-cylinder |
| Production: | 2011–present |
| Predecessor: | Mitsubishi 4B1 engine |
| Head: | Aluminium die cast |
| Block: | Aluminium die cast |
| Valvetrain: | Direct acting SOHC, 16 valves, continuously variable MIVEC intake valve timing |
| Displacement: | NaNcc |
| Bore: | 86mm 88mm |
| Stroke: | 77.4mm 86mm 97mm |
| Compression: | 10.5:1-10.7:1 |
| Fueltype: | Gasoline |
| Fuelsystem: | Multi-port fuel injection |
| Coolingsystem: | Water-cooled |
| Power: | NaN0NaN0 |
| Torque: | NaN0NaN0 |
The Mitsubishi 4J1 engine is a range of all-alloy straight-4 engines. The main goal was declared as reduction on-road CO2 emission on new vehicles.[1] According to cars specifications fuel consumption also was improved. Comparing to previous engine series (4B1) valvetrain configuration was changed from DOHC to SOHC, Variable valve lift (VVL) technology added. The engine usually is paired with the ecological features like Start-Stop system and EGR. That engine mostly is appearing in the cars Lancer X, ASX, Outlander on several markets across Japan, Europe and Latin America.
| Engine type | Inline 4-cylinder SOHC 16v, MIVEC |
| Displacement | 1798cc |
| Bore x Stroke | NaNmm |
| Compression ratio | 10.7:1 |
| Fuel system | ECI multiple |
| Peak power | 1020NaN0 at 6000 rpm(jin-net) |
| Peak torque | 1720NaN017.9kgm at 4200 rpm (jin-net) |
The new 4J10 MIVEC engine features the use of a next-generation MIVEC system that continuously regulates intake valve lift, opening duration and timing. The new MIVEC system together with improved combustion stability and a reduction in piston friction provide an improvement in fuel economy without any loss in engine performance (output and torque) over the 4B10 MIVEC engine (1.8-liter, inline-4, 16-valve DOHC).
| Engine type | Inline 4-cylinder SOHC 16v, MIVEC |
| Displacement | 1998cc |
| Bore x Stroke | NaNmm |
| Compression ratio | 10.5:1 |
| Fuel system | Electronically controlled MPI |
| Peak power | 1100NaN0 at 6000 rpm |
| Peak torque | 1950NaN0 at 4100-4200 rpm |
The 4J11 engine is the newly developed engine further improving the fuel economy. This engine can keep the same output performance as the conventional 4B11 engine by using the new MIVEC system.
| Engine type | Inline 4-cylinder SOHC 16v, MIVEC |
| Displacement | 2360cc |
| Bore x Stroke | NaNmm |
| Compression ratio | 10.5:1 |
| Fuel system | Electronically controlled MPI |
| Peak power | 1240NaN0 at 6000 rpm(eec-net 歐盟淨值) |
| Peak torque | 2200NaN0 at 4200 rpm(eec-net 歐盟精緻) （10ps net=10.7ps gross；10NM NET =10.7NM GROSS） |
"Eco friendly" replacement for 4B12.