Mitsubishi 4J1 engine

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.

Mitsubishi 4J1 engine
Overview
ManufacturerMitsubishi Motors
Production2011–present
Layout
ConfigurationNaturally aspirated 4-cylinder
Displacement1.8–2.4 L (1,798–2,360 cc)
Cylinder bore86 mm (3.39 in)
88 mm (3.46 in)
Piston stroke77.4 mm (3.05 in)
86 mm (3.39 in)
97 mm (3.82 in)
Block materialAluminium die cast
Head materialAluminium die cast
ValvetrainDirect acting SOHC, 16 valves, continuously variable MIVEC intake valve timing
Compression ratio10.5:1-10.7:1
Combustion
Fuel systemMulti-port fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output102–124 kW (139–169 PS)
Torque output172–220 N⋅m (127–162 lb⋅ft)
Chronology
PredecessorMitsubishi 4B1 engine


4J10

Specifications

Engine type Inline 4-cylinder SOHC 16v, MIVEC
Displacement 1.8 L (1,798 cc)
Bore x Stroke 86 mm × 77.4 mm (3.39 in × 3.05 in)
Compression ratio 10.7:1
Fuel system ECI multiple
Peak power 102 kW (139 PS) at 6000 rpm
Peak torque 172 N⋅m (127 lb⋅ft) at 4200 rpm

Applications

Characteristics

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).

4J11

Specifications

Engine type Inline 4-cylinder SOHC 16v, MIVEC
Displacement 2.0 L (1,998 cc)
Bore x Stroke 86 mm × 86 mm (3.39 in × 3.39 in)
Compression ratio 10.5:1
Fuel system Electronically controlled MPI
Peak power 110 kW (150 PS) at 6000 rpm
Peak torque 195 N⋅m (144 lb⋅ft) at 4100-4200 rpm

Applications

Characteristics

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.

4J12

Specifications

Engine type Inline 4-cylinder SOHC 16v, MIVEC
Displacement 2.4 L (2,360 cc)
Bore x Stroke 88 mm × 97 mm (3.5 in × 3.8 in)
Compression ratio 10.5:1
Fuel system Electronically controlled MPI
Peak power 124 kW (169 PS) at 6000 rpm
Peak torque 220 N⋅m (162 lb⋅ft) at 4200 rpm

Applications

Characteristics

"Eco friendly" replacement for 4B12.

See also

References

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