What are the hazards of installing exhaust valves?

It is basically harmless to install an exhaust valve. Generally speaking, the exhaust valve that can be changed back to pressure can meet the different requirements of high and low torque, and it is to adjust the exhaust back pressure, that is, the resistance inside the exhaust pipe. The resistance is related to the design angle of the first section, the pipe diameter/catalyst size of the middle section, the total length and bending angle, and the loop of the rear muffler.

Reversible pressure exhaust valve can be divided into normally open type and normally closed type. The former is more suitable for street cars, and the latter is more suitable for semi-factory cars that will compete next time.

From the perspective of exhaust pipe reconstruction theory, it seems to be a very complicated and difficult thing to build an exhaust pipe with both horsepower and torsion, and even an unattainable goal. After all, reducing the exhaust obstruction eliminated by the tail and maintaining the torque output are opposite arguments. However, this restriction can be changed to the introduction of pressure exhaust valve in recent years, and the ideal exhaust reform effect seems to be no longer out of reach.

As the name implies, the exhaust valve device is mainly used to control the back pressure in the exhaust pipe. From the appearance, the overall mechanism design is like a simple throttle valve, on which butterfly valves and vacuum actuators can be seen. The valve can be opened and closed by the suction of engine vacuum. As long as the valve is installed in a proper position in the exhaust pipe system, the engine can have balanced torque and horsepower performance.

The principle of exhaust valve system is to set a variable valve in the exhaust pipe. When the speed is low, the valve will be closed, so that the exhaust airflow can be discharged from a small diameter position or a single pipeline to maintain the back pressure in the exhaust pipe and prevent the torque loss at low speed. At high speed, the valve will open, and the exhaust gas will be directly discharged through the large-diameter position or double pipelines, so that the exhaust gas can be discharged through more channels and outlets, and then the back pressure in the exhaust pipe will be reduced, and the continuity of horsepower will be more ideal.

(Photo/Text/Photo: Li Yuanli) @20 19