The invention relates to an LNG and CNG automobile fire-resistant explosion-suppression
system which comprises a gas extinguishing agent
system, a
signal acquisition and alarm
system, and a
control system, wherein the gas extinguishing agent system comprises a gas extinguishing agent storage
bottle; an extinguishing agent container valve is mounted at the mouth of the gas extinguishing agent storage
bottle and is connected with an extinguishing agent transmission pipeline with a
pressure release valve thereon; a plurality of
branch pipes are connected in parallel with the extinguishing agent transmission pipeline, and each
branch pipe is connected with an electrodynamic selector valve and a
spray nozzle in sequence; end parts of the
branch pipes extend into an automobile cabin
protected area. The system provided by the system has the advantages that prewarning and early inerting suppression are automatically conducted for LNG and CNG automobile fuel outleakage and fires, can give out prewarning in case
methane concentration exceeds a pre-arranged value through real timely monitoring outleakage
methane concentration and initial
flash fire flame, can automatically open a gas suppression system in case the
methane concentration of a sealed space exceeds 3 percent of a
volume concentration or the
flash fire flame appears, and therefore compensates a gap of the LNG and CNG automobile fire-resistant and explosion-proof devices.