The automotive oil pump is an essential subsystem that not only helps in processing fluid movement from one place to another, but also ensures optimal engine performance.
Technically, it functions by circulating engine oil under pressure to the sliding pistons, rotating bearings, and the camshaft of the engine. After that, the lubricant prevents friction-induced wear.
As an outcome, it ensures the smooth operation of the engine and the longevity of engine components.
Now, these oil pumps are of 5 types, and those are mentioned in this post. You can discover them as you progress through each type.
Types of Car Engine Oil Pumps
Oil pumps are categorized into five primary types. Those are as follows:
- Crescent Pump: A crescent pump, also known as a crescent internal gear pump, is a rugged, reliable, and high-pressure pump with silent, low-ripple performance. This type is distinguished by its high oil delivery rate at low engine speeds and its two rotating wheels that generate oil pressure.
- Rotor Type Pump: A rotor pump is also known as a “gerotor” pump, which revolves within an outer rotor and inner rotor. Besides, the inner gear has one fewer lobe than the outer rotor.
This pump makes the most of the metal gear for longevity and is the most common type utilized in automotive engines.
- Gear Oil Pump: A gear pump in car applications is a type of positive displacement (PD) pump that uses rotating gears to transfer fluids. Besides, it is also referred to as a mechanical delivery device that controls the metering of liquids or viscous materials.
- Trochoid Pump: Also known as a micro annular pump, the trochoid pump is an internal gear oil pump that consists of both inner and outer gears.
The main components of this pump include an inner rotor with external lobes, inlet and outlet ports, an outer rotor with internal lobes, and a pump housing. However, this pump is known for its high efficiency, smooth performance, and compact design.
- Vane Pump: In modern vehicles, vane pumps empower steering systems and automatic transmissions while maintaining a close seal against the casing wall. This pump is ideal for low to medium viscosity liquids, including those with entrained gases. This pump is widely used due to dry priming, ease of maintenance, and good suction characteristics.
Take note, industrial machinery, small engines, and automotive engines all depend on these oil pumps. Moreover, whether it is a high-performance car or a factory turbine, oil pumps play a defining role in fixing technological faults and maximizing operational efficiency.
How to Choose the Right Oil Pump?
The process of selecting an auto oil pump is not only about understanding the types available. Instead, it is more about aligning the pump’s capabilities with the engine’s specific needs.
That said, here is how you can choose the right pump:
- Prior to selecting the oil pump, find out the engine’s lubrication needs.
- After that, think about the operating conditions.
- Then, get familiar with the types of oil pumps available.
- Up next, don’t forget about the budget.
- Finally, seek expert advice if in doubt. You might think about consulting with a mechanic or engine specialist to make an informed decision.
Conclusion
Engine oil pumps are an integral part of an engine. It not only ensures a smooth flow of oil to bearings, gears, and other moving parts but also prevents metal-to-metal contact. Today, the modern system integrates pressure relief valves to regulate flow.
For example, if pressure is elevated, excess oil gets diverted back to the sump. In true essence, oil pumps are more than just lubricators. Therefore, these can protect, cool, and prolong the life of machinery.