Which type of oil pump is typically driven by the crankshaft?

The type of oil pump that is typically driven by the crankshaft includes both gear pumps and rotary pumps. Gear pumps are commonly used in automotive engines because they efficiently move oil through the lubricating system using two interlocking gears. These gears create a vacuum that draws oil into the pump and then force it out under pressure. This design allows for a steady flow of oil, which is essential for lubricating engine components.

Rotary pumps operate on a different principle, utilizing a rotating mechanism to move oil. Like gear pumps, they are often used in engine applications due to their ability to maintain a consistent oil pressure and flow rate.

Both types of pumps are widely utilized in engines and are driven directly by the crankshaft, which ensures that the oil supply adapts to engine speed. This adaptability is crucial in maintaining proper lubrication under varying load and temperature conditions.