What is the working principle of automotive oil pump?

What is the working principle of automobile oil pump? The working principle of the motor oil pump is as follows: The working principle of the oil pump, the role of the oil pump is to increase the oil pressure, forcing the oil pressure to the friction surface of the moving parts, so that the oil can be circulated in the lubricating system to ensure the good lubrication of the engine. Beverly car engine engine oil pump is a gear pump with a pressure limiting valve, which is driven by the crankshaft through the chain work. The working principle of the pump: ⑴ pump working principle, the pump housing with a moving gear and a driven gear, the gap between the gear and the inner wall of the housing is small, the housing has an inlet. When the engine is working. The gear rotates in the direction of the arrow shown in the figure, and the volume of the oil inlet chamber 1 increases due to the movement of the gear teeth out of the meshing direction. A certain degree of vacuum is generated in the cavity, and the oil is sucked into the well from the oil inlet to fill the oil chamber. When the gear rotates, the oil stored in the teeth is brought into the oil chamber 2. Since the gear teeth on one side of the oil chamber enter into meshing, the volume of the oil chamber decreases and the pressure increases. The oil is sent to the engine oil through the oil outlet Road. The oil pump is driven by the crankshaft front-end gear through the chain. When the engine is working, the oil pump keeps working to ensure the oil circulates in the lubricating oil path. (2) The working principle of the oil pump, when the gear into the engagement, intermeshing the oil between the teeth, due to the smaller volume has a lot of pressure, the oil is compressed. However, the compressibility of the fluid is so small that the hydraulic pressure rises sharply and the pump is therefore subject to additional load to cause damage. In addition, as the hermetically sealed volume increases, a vacuum will result in vibrations and noise in the pump. To do this, a relief groove 3 is milled on the pump cover so that when the teeth of the teeth mesh, the oil squeezed out of the teeth can flow out of the oil chamber through the relief groove. (3) pump working principle, the oil pressure in the lubrication system is too high, will increase the engine power loss. To this end set in the oil pump assembly pressure limiting valve, when the oil pressure exceeds the normal value, the total oil pressure on the piston will exceed the pressure limiting valve spring preload, open the plunger to allow part of the oil back to Oil pump inlet, the oil in the road to maintain a certain pressure and flow, to meet the lubrication requirements. Car engine oil pump works like this.