The driver notices nothing while driving. By making a number of the vital moving parts in the engine, such as the pistons, gudgeon pins and counterweights, smaller or lighter, the mass that is in motion inside the engine has been reduced by about 25 per cent. In absolute figures, this means that the engine has to pull a mass weighing 3.5 to 4.5 kilograms less, depending on the variant. As the pistons are shorter, the length of the connecting rod has been increased. A number of advantages result when there is less mass in motion and less internal friction.
Performance improves, while both noise levels and fuel consumption are reduced.
In the past, piston cooling was only used on turbocharged engines. It is now also being introduced on naturally-aspirated engines. In addition, all the engines have external oil coolers. The piston ring can be moved up a couple of millimetres. All rights reserved.