Gas supply system of compressed natural gas vehicle

Abstract

The invention provides a compressed natural gas vehicle gas supply system which comprises a compressed gas cylinder device, a gas filling device and a pressure reducer, the compressed gas cylinder device comprises a first gas cylinder and a second gas cylinder, and the first gas cylinder and the second gas cylinder are arranged on the two sides of the middle position of a vehicle frame below a vehicle container respectively and are close to an engine of a vehicle; the first gas cylinder and the second gas cylinder are respectively connected with the gas filling device, one end of the pressure reducer is connected with the gas filling device, and the other end of the pressure reducer is connected with the engine; the first gas cylinder and the second gas cylinder are used for storing compressed natural gas, and the gas filling device is used for filling the compressed natural gas into the compressed gas cylinder device or guiding the compressed natural gas in the compressed gas cylinder device to the pressure reducer. By adopting the double gas cylinders, the capacity of the compressed gas cylinder device can be improved, the leakage risk of a high-pressure pipeline can be reduced, the safety of a vehicle during rear-end collision is improved, and the strength of a container is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to an air supply system for compressed natural gas vehicles. Background technique [0002] With the promotion of natural gas in the national strategic plan, natural gas vehicles have gradually increased their market share due to their advantages such as low technical difficulty, easy emission upgrades, and low cost of use. Compressed natural gas, abbreviated as CNG in English, is one of the directions in the application of light trucks. [0003] The gas supply system of natural gas light trucks in the prior art usually has a gas cylinder and is arranged at the rear of the car. Due to the low energy density of compressed natural gas, the size of the gas cylinder is relatively large, but the chassis space of light trucks is relatively compact, and only one gas cylinder can be arranged. The size of the gas cylinder is relatively limited, and the capacity of the...

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Problems solved by technology

[0003] The gas supply system of natural gas light trucks in the prior art usually has a gas cylinder and is arranged at the rear of the car. Due to the low energy density of compressed natural gas, the size of the gas cylinder is relatively large, but the chassis space of light trucks is relatively compact, and only one gas cylinder can be arranged. Gas cylinders, so that the size of the gas cylinders is greatly restricted, and the capacity of the gas cylinders is limited, resulting in a shorter cruising range of the vehicle

At the same time, due to the long distance from the gas cylinder to the engine, the high-pressure pipeline is long, which is easy to cause the risk of leakage

Moreover, the gas cylinder is arranged at the rear of the vehicle, and traffic accidents such as rear-end collisions may easily cause gas cylinder rupture or pipeline damage, causing compressed natural gas leakage accidents, and the safety is poor

Moreover, the cargo box is generally installed on the vehicle frame longitudinal beam through the cargo box longitudinal beam, and the length of the cargo box and the vehicle frame longitudinal beam is equivalent. The part above the gas cylinder is suspended, causing the strength of the cargo box to be affected

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