1. Distribution and Lubrication
TYPICAL OIL SYSTEMS
Piston Engines
Distribution and Lubrication

2. TYPICAL OIL SYSTEM - PISTON ENGINE
‘WET’ SUMP SYSTEM
Engine Block
Pump
Filter
SUMP
Common for most vehicles
TYPICAL OIL SYSTEM - PISTON ENGINE

3. TYPICAL OIL SYSTEM - PISTON ENGINE
‘DRY’ SUMP SYSTEM
Engine Block
SUMP
Pump
Filter
Tank
Scavenge Pump
High Performance/Rally vehicles and Aircraft
TYPICAL OIL SYSTEM - PISTON ENGINE

4. Let’s take a closer look at what happens here
TYPICAL OIL SYSTEM – Distribution

5. 3 2 4 1 TYPICAL OIL SYSTEM – Bearing Locations/Lubrication
No 3 Piston 3
No 2 Piston 2
No 4 Piston 4
No 1 Piston 1
Front Bearing Support
Rear Bearing Support
Bearing Support
CRANKSHAFT FROM A 4 CYLINDER ENGINE
TYPICAL OIL SYSTEM – Bearing Locations/Lubrication

6. TYPICAL OIL SYSTEM – Bearing Lubrication
Con Rod Big End
Oil Splash
Plain Bearing
Internal Oil Feed
Lubricating Oil Film
Oil Distribution Groove
Crankshaft
Oil Splash
TYPICAL OIL SYSTEM – Bearing Lubrication

7. TYPICAL OIL SYSTEM - Internal Gear Type Pump
Pump Assembly – (end plate removed)
Pump Body
‘Kidney’ Ports
Driving Gear
Driven Gear
Yellow = Inlet Flow
Red = Outlet Flow
Rotating Parts
Kidney Ports
TYPICAL OIL SYSTEM - Internal Gear Type Pump

8. Any Questions?