Gas supply system part for liquefied natural gas vehicle

Abstract

The invention discloses a gas supply system part for a liquefied natural gas vehicle. The gas supply system part comprises a vehicle-mounted gas bottle for containing low-pressure liquefied natural gas. The gas supply system part is characterized in that a manual stop valve, a pressure stabilizing valve and a heat exchanger which are used for increasing the temperature of the liquefied natural gas and achieving heat exchange cycle are arranged outside the vehicle-mounted gas bottle for the liquefied natural gas; an outlet is further formed in the gas bottle for the liquefied natural gas, and the outlet, the manual stop valve, the pressure stabilizing valve and the heat exchanger are sequentially connected through pipelines; and the heat exchanger is further connected to an inner cavity of the gas bottle for the liquefied natural gas through a pipeline. More liquefied natural gas can be contained, the full charge endurance of the liquefied natural gas vehicle is increased, and meanwhile a liquefied natural gas station only needs to be designed and built according to the normal pressure; and the station building cost and the exhaust waste of the liquefied natural gas are reduced.

Description

technical field [0001] The invention relates to a gas supply system component of a liquefied natural gas vehicle. Background technique [0002] With the rapid development of our country's economy, our country's environmental pollution problem is becoming more and more serious. Among them, the main pollution source of the urban environment is the emission of vehicle exhaust. Experts believe that natural gas is one of the most ideal fuels to replace gasoline. Natural gas releases 20% less carbon dioxide than gasoline combustion, and has much lower toxic emissions. It is a clean vehicle fuel. [0003] Natural gas vehicles are divided into liquefied natural gas (LNG) vehicles and compressed natural gas (CNG) vehicles. For automobiles, to make the engine work normally, the workflow is described as follows: the natural liquefied gas factory supplies low-temperature liquefied natural gas (generally ≥ 0.1Mpa) to the liquefied natural gas filling station, and the liquefied natural ...

AI Technical Summary

Problems solved by technology

However, if the LNG pressure is set within the intake pressure range of the engine (generally 0.35MPa ~ 1.6Mpa) on the LNG filling station, the pressure at this time is very close to the safe take-off pressure set in the filling station. , the liquefied natural gas will be emptied soon, causing unnecessary waste of liquefied natural gas and increasing the maintenance and use costs of the liquefied natural gas filling station

[0006] 3. If the saturation pressure in the LNG refueling station is too high, the density of LNG will decrease, resulting in a reduction in the loading quality of the vehicle LNG cylinder under the same volume, thereby reducing the mileage of the car

Images