Want to know how an      Oil Pumps     contributes to the overall health and operation of a vehicle engine?

How does the oil pump work? Let's break it down.

Oil pressure is not constant
If you have ever driven a car with an accurate oil pump gauge to track actual pressure, you will notice that the pressure in the engine will not remain constant. This is not a design flaw-idling engines, like engines running at higher speeds, do not need to maintain the pressure to lubricate all moving parts. Typically, 10 psi is required for every 1,000 rpm, although this number may vary with high-performance engines.

The direct relationship between oil pressure and engine speed is related to the pump design itself. These devices are linked to the engine's crankshaft in order to get the drive they need to function, typically running at half the crankshaft speed. The amount of pressure generated is a function of the engine speed itself.

Oil pump
Most engines use a wet oil pan oiling system, which means that the bottom of the rotating parts of the engine passes through the oil pan and sprays lubricant upwards onto the cylinder as it rotates. The oil pump is required to push the oil to the top of the motor.

There are many pump designs, but each pump revolves around the concept of a set of gears or rotors by pressing the oil against the shell of the gear or rotor to pressurize the oil. Gear pumps are an older design, and rotors—especially eccentric rotor designs—which consist of two rotors with one more lobe on one side than the other—are more common in modern vehicles. There are also designs that use sliding blades on the rotor, as well as a dry oil pan oiling system that completely eliminates the oil pan and relies on a pair of oil pumps to keep the entire rotating assembly lubricated.

Each type of pump pushes the oil into the engine's oil filter, then pushes it up to the top by the electric motor, and finally drips back to the oil pan. There are also pressure valves that can be opened to ensure that the oil does not exceed a certain psi, otherwise it will damage internal components.

In short, pumps are designed differently in modern cars, but this is an essential part of getting a car's engine running.

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