
62 LIGHT AND HEAVY VEHICLE TECHNOLOGY
The Brinell hardness test, so named after J.A. Brinell
who introduced it in 1900, measures the resistance to
penetration of a material by a harder one in the form of
a steel ball, and gives a useful indication of the tensile
strength of the material being tested.
2.4 PISTONS AND CONNECTING RODS
Pistons and rings
A diesel engine piston (Figure 2.10) differs from
its petrol engine counterpart in the following basic
respects.
Increased sectional thickness of metal
This is concentrated in the upper portion of the piston
for better heat dissipation and to afford the maximum
possible support for the more heavil ...