Fig. 2.8. Piston and skirt of the piston

The piston is made of aluminum alloy, and the area of a skirt is made compact and easy. A part of the bottom of the piston has the maple form for improvement of fuel profitability. The skirt of the piston is covered with polymer for decrease in losses on friction. Piston fingers of floating type. Increase in accuracy of processing of the cylinder allowed to use pistons of one outer diameter (see fig. 2.8).