How to adjust the mixture of automobile natural gas engine

Start the engine with gasoline first, then switch from gasoline to natural gas, adjust the carburetor idle screw, change the throttle opening, and let the engine run.

Under the regulation of the pressure reducer, the mixer can automatically adjust the gas supply and the uniform mixing of air and natural gas according to the different vacuum degrees generated under different working conditions of the engine to meet the requirements of the engine for combustion. The power valve can change the low-pressure pipeline and cross-sectional area of natural gas and adjust the closing of the mixing valve, so that the original vehicle fuel supply system can resume normal fuel supply and the engine can operate normally. The control system is mainly composed of fuel transfer switch. By controlling the switch of gasoline solenoid valve and gas solenoid valve, the choice of oil supply and gas supply can be realized.

The working principle of natural gas vehicles is consistent with that of gasoline vehicles. In short, natural gas is mixed with air in the cylinder of a four-stroke engine, ignited by a spark plug, and pushes the piston up and down. Although there are some differences in flammability and ignition temperature between natural gas and gasoline, the running mode of natural gas vehicles is the same as that of gasoline vehicles.

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 and absorb external heat, so there is also a heating device using circulating water from the engine on the pressure reducing valve.

In order to improve the operating performance of the vehicle, the cab is equipped with an oil-gas fuel changeover switch for unified control of the oil-gas solenoid valve and the ignition time converter. 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.