How Does an Oil Pump Work?

How Does an Oil Pump Work?


Oil pump circulation in an engine is generally occurring by circulating oil and providing pressure to the rotating bearings.

The oil lubricates the engine bearing, and its function is to cool down the engine. The main purpose of oil pumping is lubrication and absorbing the excess heat.

When the oil pumping is not properly distributed all over the engine, then friction occurs. Not for proper oil pumping in the engine may get damaged or burn.

You should have proper knowledge about oil pumping in the engine and how they work. Read more to know how does an oil pump work.    

The Function of Oil Pumping in Engine

Lubricating Function

The major role of oil pumping is lubrication by circulating engine bearing. It lubricates the whole system and absorbs the heat of the engine by cooling it down. Also, it forces oil gradually to power actuators as a hydraulic fluid. 

Decreasing Friction

Friction is not good for the engine. It hampers the performance of the engine and damages the whole product also. Oil pumping reduces friction removing heat from shafts, bearing, and pistons. Insufficient lubrication causes friction.

The oil is commonly pumped from the slum. The oil goes through a mesh filter, which is used for removing wreckage around the engine. Before pumping oil all over the engine, the oil cools down after filtration. 

Types of Oil Pump

 Some types of oil pump are given below-

- Gear Type Oil Pump
Rotor Oil Pump
Eccentric Rotor Oil Pump
Double Gearwheel Oil Pump
Dry Sump Oil Pump 

    How Does an Oil Pump Work?

    The oil pressure unit depends on the engine speed. The oil pressure is not constant at all times. Each pumping speed and design is different from each other. Here we have outlined how does an oil pump work? 

    1 - Gear Type Oil Pump

      It is the most common type. It has two meshing gear. The gears rotate by carrying oil around. It produces a positive flow, which directs its flow all over the engine.

      If somehow the engine is blocked, at that time, the pressure of oil increases immediately to break the block of the engine. The gear type oil pump requires a pressure relief valve. 

      2 - Rotor Type Oil Pump

        This type is also common as a gear-type oil pump. It consists of four or five lobes. These lobes rotate inside an outer ring, which also has five or six lobes.

        The inner rotor axis is branched from the outer rotor axis. As a result, the outer rotor is conducted by the inner rotor, and their volume differs between their rotations. Like the gear-type oil pump, it also requires a relief valve. 

        3 - Eccentric Rotor Oil Pump

          It is the most common oil pump. This type of oil pump is generally used in modern cars.

          The main components of this type of oil pump are an external and internal rotor. They are situated eccentrically to each other.

          The outer rotor consists of five lobes facing inwards, and the inner rotor consists of four lobes outwards. The outer rotor overcomes the inner rotor. 

          4 - Double Gearwheel Oil Pump

            This type of oil pump is rarely used in modern cars. The function of the double gear wheel oil pump is pretty much similar to the eccentric rotor oil pump.

            The difference is the oil is pumped by spaces that are formed among the gear teeth, where the eccentric oil pump is circulated by the lobed rotors.

            Oil is carried in the annular spaces by the gear teeth. The pumped oil was forced out of the tooth and reached the lubricating system. This oil pump system is not as complex as others.

            For more queries about the oil pump, its function, and testing, the oil pump can be a good choice



            Before starting your vehicle, check your engine is pumping oil properly or not. The oil failure problem is not a good sign.

            It damages the whole system and accidents may occur if not handled the situation properly.

            Do not drive your vehicle if your engine is not pumping oil properly. Try to be alert while driving your car and if oil failure occurs immediately, stop your vehicle.

            I hope this article helped you to give all information about how an oil pump works. 

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            Don't have any idea about oil pumping in an engine? Want to know about oil pumping in your vehicle engine? Here we have discussed how does an oil pump work. Read below to learn more about this.