How to adjust natural gas pressure reducing valve in automobile modification

Depending on the adjustment of the control and regulation system, the pressure fluctuation behind the valve is balanced with the spring force, and the pressure behind the valve remains constant within a certain error range. Because there is a certain gap between the power of natural gas and engine oil, it is possible to save gas costs by reducing it as much as possible while keeping the idle speed stable and the speed-up torque absolutely sufficient. ?

Extended data:

Working principle and function of automobile natural gas pressure reducing valve;

The pressure reducing valve assembly is provided with an idle valve for providing idle gas for the engine; In the process of decompression, the compressor needs to expand to do work to absorb external heat, so the pressure reducing valve is also equipped with a heating device that uses the engine to circulate water.

In order to improve the operating performance of the vehicle, an oil-gas fuel changeover switch is installed in the cab to control the oil-gas solenoid valve and the ignition time converter in a unified way. The ignition time converter automatically changes the different ignition advance angles of the two fuels through the circuit system. Five traffic lights on the gas indicator on the dashboard show the gas storage capacity of the gas cylinder; The fuel transfer switch is also equipped with an engine air supply button.

So it has complete functions and is very convenient to operate. When the fuel changeover switch is in the natural gas position, the solenoid valve is opened and the gasoline valve is closed. The natural gas in the gas cylinder flows through the master valve, filter and solenoid valve, enters the pressure reducer, is depressurized to negative pressure through multiple stages, then enters the mixer through the power valve, and is ignited after being mixed with the air from the air filter, so as to drive the engine crankshaft to rotate.

References:

Baidu encyclopedia-natural gas automobile