Piston cooling oil control valve
Pneumatic system for storing engine hot oil for cold start
Pneumatic system for storing engines hot oil in cold weather
Pocketed gear differential
Pollution control system
Power unit
Pre-oiling kit for an internal combustion engine
Pre-start lubricator
Prelubrication systems and method
Pressure lubrication for inverted flight
Process for treating oil emissions in a gas turbine engine
Pump control system
Pump drive structure of water-cooled internal combustion engine