Device for adjusting oil pressure of engine

Abstract

The invention discloses device for adjusting oil pressure of an engine, comprising an oil pump, a pressure-adjusting valve and a safety valve integrally cast with shells. The shell of the oil pump comprises a rotor chamber and a non-rotor chamber, and through the matching with a rotor, the shell of the oil pump is divided into a low-pressure cavity, a high-pressure cavity of the rotor chamber and a high-pressure cavity of the non-rotor chamber; the shell of the pressure-adjusting valve is provided with three oil holes including a top oil hole communicated with an oil channel of a cylinder and located at the top end of the shell of the pressure-adjusting value, two side oil holes communicated with the high-pressure cavity of the non-rotor chamber and a oil hole communicated with the low-pressure cavity. The shell of the safety valve is provided with six openings including three openings facing to a space in an oil bottom shell, a valve top opening leading to a main oil channel, a middle side opening communicated with the high-pressure cavity of the rotor chamber and holes communicated with the high-pressure cavity of the non-rotor chamber. The pressure adjusting device is integrated with the oil pump, the pressure-adjusting valve and the safety value, thereby effectively reducing the power consumption of the engine, ensuring the safety and the reliability of the oil pump and saving the space and the cost.

Description

technical field [0001] The invention relates to an engine oil pressure regulating device. Background technique [0002] During the operation of the engine, the oil in the main oil passage of the engine should not be too high or too low. If it is not properly controlled, it will affect the economy and reliability of the engine, and even damage the engine, causing huge losses to users. [0003] There are two types of traditional oil pressure regulation methods, one is the constant flow oil pump, that is, a safety valve is installed at the outlet of the oil pump, and the oil pressure at the outlet of the oil pump directly controls the opening and closing of the valve. This pressure regulating mechanism has a simple structure , but the work is extensive, and there will be large pulsation when the engine is running at high oil pressure, which will consume too much engine power, and during the entire pressure regulation process, the oil discharged to the oil pan through the safety...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the engine, the oil in the main oil passage of the engine should not be too high or too low. If it is not properly controlled, it will affect the economy and reliability of the engine, and even damage the engine, causing huge losses to users.

[0003] There are two types of traditional oil pressure regulation methods, one is the constant flow oil pump, that is, a safety valve is installed at the outlet of the oil pump, and the oil pressure at the outlet of the oil pump directly controls the opening and closing of the valve. This pressure regulating mechanism has a simple structure , but the work is extensive, and there will be large pulsation when the engine is running at high oil pressure, which will consume too much engine power, and during the entire pressure regulation process, the oil discharged to the oil pan through the safety valve will impact the original oil, which will cause A large number of air bubbles are generated, thereby causing cavitation in the oil passage and wearing friction pairs; the other is to control the opening and closing of the pressure regulating valve through the oil pressure of the main oil passage, which can effectively reduce the loss of engine power caused by the oil pump and prevent cavitation However, since the opening and closing of the valve is controlled by the oil pressure of the closed main oil passage, once the oil passage is abnormal, the oil pump will work in an overload state, thereby damaging the oil pump, and then damaging the entire engine, causing huge losses In addition, when the engine is running at high speed, due to the structural characteristics of the valve body of this type of pressure regulating valve, after the pressure regulating flow of the valve body reaches a certain level, it cannot continue to control the pressure. If the speed continues to increase, the oil pump will exceed Load operation, thus damaging the oil pump

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