Cylinder block alloy Aluminium die cast | Production 2011–present Cylinder head alloy Aluminium die cast | |
Valvetrain Direct acting SOHC, 16 valves, continuously variable MIVEC intake valve timing | ||
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. According to cars specifications fuel consumption also was improved. Comparing to previous engine series (4B1) valvetraint configuration was changed from DOHC to SOHC.
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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).
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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.
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"Eco friendly" replacement for 4B12.