Function of automobile pressure reducing valve

This kind of safety valve, also known as pressure relief valve or safety valve, opens when the pressure of the oil supply pipeline exceeds the limit, and directly releases the pressure into the oil tank, for example, it is generally stipulated as 450Kpa. The reasons may be that the oil supply pipeline is blocked or bent, the oil return pipe is bent or blocked, and the fuel filter is blocked. The pressure relief valve on the gasoline pump is usually not easy to break. Pressure reducing valve, also known as safety valve, can automatically open and close according to the working pressure of the system, and is generally installed on the equipment or pipeline of the closed system to protect the safety of the system. Function of automobile pressure reducing valve: 1. I think "pressure relief valve" is just a general term, and its official name should be "bypass valve". There are two kinds of pressure relief valves in automobile turbocharging system: intake valve and exhaust valve. The key reason is that the turbocharger includes an air inlet housing and an exhaust housing. The function of the former is to discharge the excess air in the intake pipe when the throttle valve is closed, so as to prevent the returning air from colliding with the high-speed rotating intake blade and causing damage to the intake blade; 2. The function of the latter is to ensure the safety of the turbocharger and the engine itself. Because the turbocharger is driven by the exhaust gas from the engine, the high temperature, high pressure and high speed make it in a very harsh working environment. Excessive temperature and pressure will basically cause irreversible damage to turbocharger and engine; 3. Among them, if the temperature is too high, it will damage the turbocharger blades whose rotating speed exceeds 654.38+ 100000 rpm, and the oil will evaporate excessively at high temperature, which will reduce the lubricating ability of the blade shaft and shaft sleeve (bearing). Overpressure will make the thrust bearing supporting the fixed blade axis and shaft sleeve (bearing) too high, and some thrust bearings of turbocharger may be deformed or broken. At the same time, the supercharge value exceeding the normal range will also cause serious engine knock, which is also the key reason for engine damage in general.