Podcast
Questions and Answers
What is the purpose of a baffle or windage tray in an engine?
What is the purpose of a baffle or windage tray in an engine?
What is the advantage of a dry sump system?
What is the advantage of a dry sump system?
What is the purpose of engine oil?
What is the purpose of engine oil?
Study Notes
- The oil pan is where engine oil is used for lubricating the engine.
- Oil pan shapes are often used to keep the oil inlet under the oil at all times.
- As the crankshaft rotates, it acts like a fan and causes air within the crankcase to rotate with it. This can cause oil foaming.
- Oil with air will not lubricate like liquid oil, so oil foaming can cause bearings to fail.
- A baffle or windage tray is sometimes installed in engines to eliminate the oil churning problem.
- Windage trays have the good side effect of reducing the amount of air disturbed by the crankshaft, so that less power is drained from the engine at high crankshaft speeds.
- A dry sump system uses an externally mounted oil reservoir.
- The advantages of a dry sump system are as follows:
- A shallow oil pan allows the engine to be mounted lower in the vehicle to improve cornering.
- The oil capacity can be greatly expanded because the size of the reservoir is not limited.
- A dry sump system allows the vehicle to corner and brake for long periods, which is not able to be done with a wet sump system due to the oil being thrown to one side and away from the oil pickup.
- A dry sump system also allows the engine to develop more power as the oil is kept away from the moving crankshaft.
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