Mitsubishi 4J1 engine

4J1
Overview
Manufacturer Mitsubishi Motors
Production 2011–present
Combustion chamber
Cylinder block alloy Aluminium die cast
Cylinder head alloy Aluminium die cast
Valvetrain Direct acting SOHC, 16 valves, continuously variable MIVEC intake valve timing
Chronology
Predecessor Mitsubishi 4B1 engine

The Mitsubishi 4J1 engine is a new 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) valvetraint configuration was changed from DOHC to SOHC.

4J10

Specifications

Engine type Inline 4-cylinder SOHC 16v, MIVEC
Displacement 1.8 L (1,798 cc)
Bore 86 mm
Stroke 77.4 mm
Compression ratio 10.7:1 
Fuel system ECI multiple
Peak power 102 kW (138.7 PS) at 6000 rpm
Peak torque 172 N·m (126.9 ft·lb) 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 86 mm
Stroke 86 mm
Compression ratio 10.5:1 
Fuel system Electronically controlled MPI
Peak power 110 kW (149.6 PS) at 6000 rpm
Peak torque 195 N·m (143.8 ft·lb) 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 86 mm
Stroke 97 mm
Compression ratio 10.5:1 
Fuel system Electronically controlled MPI
Peak power 124 kW (168.6 PS) at 6000 rpm
Peak torque 220 N·m (162.3 ft·lb) at 4200 rpm

Applications

Characteristics

"Eco friendly" replacement for 4B12.

See also

Wikimedia Commons has media related to Mitsubishi 4J1 engines.

References

  1. ↑ http://www.mitsubishi-motors.com/publish/pressrelease_en/products/2011/news/detail0808.html
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