The invention relates to a high-safety liquefied natural gas vehicle alarm system comprising a gasifier outlet temperature detection device and an alarm host. The gasifier outlet temperature detectiondevice comprises a low-temperature acquisition module, a low-temperature judgment module, a low-temperature power-off module and a low-temperature data sending module. The low-temperature judgment module receives the low-temperature data acquired by the low-temperature data acquisition module in real time; when the temperature T of the outlet position of the gasifier is monitored to be larger than -30 DEG C and smaller than or equal to -25 DEG C, the duration time exceeds 2 min or the temperature of the outlet position of the gasifier is less than or equal to-30 DEG C and the duration exceeds2 seconds, namely the liquefied natural gas is incompletely gasified, a low-temperature alarm signal is sent out; and the low-temperature power-off module receives the low-temperature alarm signal and immediately controls an electromagnetic valve between the gasifier and an engine to be closed to stop providing gas for the engine. Extremely cold liquefied natural gas or gas-liquid mixed gas flowis prevented from entering rear-end parts of a gas supply system, the service life of an engine is prolonged, and the running performance of a vehicle is improved.
本发明所述的高安全性液化天然气车辆报警系统包括气化器出口温度检测装置和报警主机;气化器出口温度检测装置包括低温采集模块、低温判断模块、低温断电模块和低温数据发送模块,低温判断模块实时接收所述低温数据采集模块采集到的低温数据,当监测到气化器出口位置的温度为‑30℃<T≤‑25℃且持续时间超过2分钟,或当气化器出口位置的温度≤‑30℃且持续时间超过2秒时,即液化天然气汽化不完全的情况下,发出低温报警信号,所述低温断电模块接收到所述低温报警信号立即控制关闭气化器与发动机之间的电磁阀,停止向发动机供气。避免了极冷的液态天然气或气液混合气流进入供气系统的后端零部件,提高发动机的使用寿命和汽车的运行性。
High-safety liquefied natural gas vehicle alarm system
一种高安全性液化天然气车辆报警系统
2020-09-01
Patent
Electronic Resource
Chinese
Liquefied natural gas (LNG) safety
NTRS | 1977
|Liquefied Natural Gas (LNG) Vehicle Fuel
SAE Technical Papers | 2011