•  In accordance with the adoption of the common rail injection system, the piston head shape (combustion chamber) has been changed.

•  A reduction in friction has been achieved by the coating of the skirt area together with a compression rating setting of 18.0.

•  To realize high combustion efficiency, the diffusion area of the hotspot at combustion has been expanded by the change in the shape of the combustion chamber and the spray pattern of fuel injectors. Exhaust emission and combustion noise have been reduced through smooth and uniform combustion.