Page 238 - The Tribology Handbook

Pistons B16

I.C. ENGINE PISTON DESIGN

Piston materials

The % composition of typical eutectic piston alloys is
shown below:-

Gasnline Diesel
pistons pistons
% %
Silicon 10.0-13.0 11.0-12.5
Copper 0.7-1.5 0.7-1.5
Magnesium o.ai.5 0.7-1.3
Iron 1.0 rnax 0.5 max
Manganese 0.5 rnax 0.25 rnax
Zinc 0.5 max .0.1 max
Aluminium remainder remainder

Ring arrangements
Typical ring arrangements for the four main types of IC engines are shown in Figure 16.8.

(a) Typical four-stroke petrol engine ring layout:
(b) Typical four-stroke diesel engine ring layout:
(c) Two-stroke petrol engine piston showing ring layout:
(d) Four-stroke medium speed diesel piston showing ring layout

Figure 16.8 Typical ring arrangements for the four main types of IC engines

B16.5