What is a car engine overflow pipe
Automobile engine overflow pipe is a device used to keep the pressure of hydraulic system constant, prevent system overload, unloading, remote pressure regulation, high and low pressure multistage control and other functions. In hydraulic systems, the relief valve (also known as the relief pipe) usually works in conjunction with the throttling element and load to balance the amount of oil in the hydraulic system and ensure constant pressure. When the system pressure exceeds the preset safety limit, the relief valve automatically opens to return excess oil to the tank or low pressure circuit, thereby preventing system overload .
The specific role of the overflow pipe
keep constant pressure of hydraulic system : in the quantitative pump system, the relief valve is usually open, with the change of the oil required by the working mechanism, the overflow flow of the valve will be adjusted accordingly, so as to balance the oil in the hydraulic system and ensure the constant pressure .
to prevent the overload of the hydraulic system : the relief valve as a safety valve, in normal working condition to keep closed. When the system pressure exceeds the preset safety limit, the valve will automatically open to prevent system overload .
unloading : by connecting the reversing valve and the fuel tank, the unloading function of the oil circuit can be realized .
remote pressure regulator : Connect the remote pressure regulator, can achieve remote pressure regulation in a certain range .
high and low pressure multistage control : connect multiple remote pressure regulator, can achieve high and low pressure multistage control .
Application examples of overflow pipes in different systems
Toyota transmission : The main function of the Toyota transmission overflow pipe is to ensure that the liquid inside the transmission is maintained at a stable level and is quickly discharged when the liquid is too much to prevent problems caused by overpressure. The diameter design of the overflow pipe is very important to ensure the smooth discharge of excess liquid when the level rises to ensure the normal operation and durability of the gearbox .
The main function of the automotive engine overflow pipe is to maintain the stability of the engine coolant level in the system, and to quickly remove excess liquid when the liquid level is too high. The orifice section of the overflow pipe must be large enough to ensure that excess coolant can flow out quickly when the level exceeds the set height, thereby preventing system overpressure .
Specifically, the functions of the engine overflow pipe include:
Keep the liquid level stable : The design of the overflow pipe ensures that the liquid level of the coolant in the system is maintained within a certain range to prevent the normal operation of the engine because the liquid level is too high or too low.
removal of excess liquid : when the coolant level exceeds the set height, the overflow pipe can quickly discharge excess liquid to prevent system overpressure, thus protecting the engine and other components from damage .
warning function : Although the primary function of an overflow pipe is not a warning, its design usually includes a visual part to provide a visual warning if the level is too high.
ventilation and balancing pressure : the overflow pipe also plays the role of ventilation and balancing the internal pressure of the system to ensure that the gas in the coolant system can be smoothly discharged and maintain the normal operation of the system .
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