Pressure-limiting valve integrated with high back pressure exhaust brake valve

Abstract

The invention provides a pressure limit valve integrated with a high back-pressure exhaust brake valve. The pressure limit valve is characterized in that the valve consists of a valve body of an exhaust brake valve, a valve body of a pressure limit valve, a spring, a spring base, a nut, an adjusting bolt, a valve flap, a butterfly valve, an air inlet end, an air outlet end and a bypass passage; the spring base, the spring and the valve flap are sequentially arranged in the valve body of the pressure limit valve; the valve flap seals the valve body of the pressure limit valve; the valve body of the exhaust brake valve is provided with the bypass passage; the valve body of the pressure limit valve and the valve body of the exhaust brake valve are installed together; one end of the adjusting bolt contacts with the spring base; the nut is arranged at the other end of the adjusting bolt; the pressure limit valve integrated with a high back-pressure exhaust brake valve has the advantages of optimizing the exhaust back-pressure and improving the brake power.

Description

technical field [0001] The invention belongs to the technical field of pressure-limiting valves for automobile exhaust brake valves, in particular to a pressure-limiting valve integrated with a high back pressure exhaust brake valve. Background technique [0002] Exhaust brake valves have been widely used in high-power commercial vehicles due to their high braking power, simple manufacture, and low cost. When a commercial vehicle is driving on a road with good road conditions and needs to slow down, the exhaust brake valve can be used independently to achieve a satisfactory braking effect. In mountainous areas with long and steep downhill roads, the exhaust brake and engine brake are generally used in combination to increase braking power. [0003] Existing exhaust brake valve kind is a lot, and they are usually made up of parts such as butterfly valve, valve body and cylinder, are installed behind the exhaust manifold of engine, or are installed behind supercharger. [00...

AI Technical Summary

Problems solved by technology

In addition, when the butterfly valve of the exhaust brake valve is closed, the exhaust back pressure in the exhaust pipe increases, and the exhaust back pressure acts on the back cone surface of the exhaust valve. When the exhaust back pressure exceeds the exhaust When the resultant force of the door spring preload and cylinder pressure, the exhaust valve will open twice, which will cause great damage to the components of the valve train, especially the exhaust valve.

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