The function of the four-circuit protection valve in the automobile brake system is to divide the entire vehicle air circuit into four interconnected and independent circuits to ensure that when any circuit fails, the other circuits can still work and inflate normally. Under normal circumstances, the four-circuit protection valve is actually a five-way joint, which only plays a protective role when a circuit breaks or leaks.
The working principle of the four-circuit protection valve is to control the front and rear wheels, trailers and auxiliary air circuits respectively through four independent air outlets. When one of the circuits fails, the four-circuit protection valve can ensure that the other circuits work independently and will not be affected. This design improves the safety of the vehicle and ensures that the vehicle can still brake in an emergency.
The method of judging the failure of the four-circuit protection valve includes checking whether the pipeline is ventilated or leaking, and whether the one-way valve is stuck or the diaphragm is broken. The causes of the failure may include corrosion caused by a large amount of moisture in the airway, foreign matter falling off and affecting the diaphragm, etc. During the installation and configuration process, it is necessary to pay attention to the installation direction of the diaphragm and the accuracy of the air pressure adjustment to ensure the normal operation of the protection valve.
