What Is CNG Pressure Reducer
The pressure reducer of natural gas vehicle is a very important part of the Compressed natural gas supply system. Its main function is to gradually reduce the pressure of high-pressure natural gas to the allowable range of gas fuel pressure of the engine.
The pressure reducing valve reduces the inlet pressure to a desired outlet pressure through the throttling of the opening and closing parts, and maintains a stable outlet pressure. But in general, when 20Mpa natural gas passes through the intake valve core group and enters the first stage pressure reducing chamber, the first stage diaphragm gradually moves up. When the pressure in the first stage pressure reducing chamber reaches a certain value and the thrust of the diaphragm completely overcomes the pre tightening force of the first stage spring, the combined torque acting on the lever causes the valve core to close the valve port.
The gas that has undergone the first level of pressure reduction enters the second level pressure reducing chamber. As the engine load changes, the second level diaphragm drives the valve plate (valve) of the second level lever through the second level transmission rod to adjust the opening of the second level valve port. As the flow rate of the third stage pressure reducing chamber changes, the opening of the second stage valve port is constantly changed, and the output pressure of Baote is around 0.08Mpa.
High pressure Compressed natural gas comes out of the gas storage cylinder, passes through the natural gas filter and enters the high pressure reducer through the high pressure solenoid valve. The opening and closing of the high pressure solenoid valve is controlled by the ECM. The function of the high pressure reducer is to adjust the pressure of high pressure.
Refer to :https://patents.google.com/patent/CN203571149U/en
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