12/29/2003

Piston Oiling

From Bios 1612 on piston oiling

"Other modifications made have mainly been in details. Thus M.A.N., on
their two-stroke double acting engine injected lubricating oil through a
nozzle on to the cylinder walls. This was all consumed, and it was
claimed that both wear and fuel consumption were greatly reduced.
Junkers, in their opposed piston aero diesel engine, had pistons made in
three sections, the one being a steel crown that ran at 1300?F. Four
through bolts, with heavy springs to take up expansion, held it
together. Kl?ckner- Humboldt-Deuts were developing a 16 cylinder diesel
aero engine. In this, open combustion chambers were used, with six or
eight hole fuel injection nozzles. The fuel injection time at 2000
r.p.m. was shortened from 50? to 30?. To prevent ring sticking the top
piston ring, (a composite type) had its upper half made in two separate
segments.