CN201792732U - Natural gas vehicle - Google Patents

Abstract

The utility model provides a novel natural gas vehicle which comprises a frame, a natural gas engine arranged on the front portion of the frame, natural gas storage tanks and a natural gas supplying system used for supplying the natural gas in the natural gas storage tanks to the natural gas engine, wherein the natural gas storage tanks are longitudinally arranged in a symmetrical mode outside a longitudinal beam of the frame and between a front wheel and a back wheel so that space between the front wheel and the back wheel are fully used. On one hand, the defect that the natural gas storage tanks are easy to be impacted when put on the rear portion of the vehicle is overcome. On the other hand, larger space for placing the natural gas storage tanks is achieved and the total natural gas storage volume of the natural gas storage tanks can be set larger, thereby being favorable for increasing loading capacity and driving mileage of the natural gas vehicle and leading the natural gas storage tanks to be convenient to be used in vehicles of multi-purpose vehicles and heavy trucks. Further, the natural gas storage tanks are arranged outside the longitudinal beam in a symmetrical mode, thereby being favorable for balance of weight of the overall vehicle to improve operation stability.

Description

a natural gas vehicle

technical field

The utility model relates to a natural gas vehicle, in particular to medium and heavy vehicles using compressed natural gas as energy.

Background technique

With the rapid development of my country's economy, the number of cars has increased sharply. Cars have brought great convenience to people and made great contributions to the development of human society. But at the same time, it consumes a large amount of oil resources, discharges a large amount of harmful gases, and causes great harm to the human living environment. In order to solve this problem, people have been seeking ways to change the energy structure and adopt low-pollution automobile alternative fuels.

Currently, natural gas vehicles have been developed that use compressed natural gas as a fuel for the vehicles. Natural gas vehicles are environmentally friendly, economical and safe to use, do not explode when exposed to open flames, have good cold start and low temperature start performance, can burn lean mixtures, prolong the life of lubricating oil and engines, and thus gain more use. For example, some public transport vehicles have been operated with natural gas, and natural gas tanks are installed at the rear of such vehicles. On the one hand, this kind of structure has great potential safety hazards. On the other hand, the amount of natural gas that can be carried is small, which is not conducive to the use of vehicles with long continuous mileage (especially commercial vehicles, such as medium and heavy trucks).

Therefore, although natural gas vehicles have made great progress in urban buses, commercial vehicles fueled by natural gas are still blank, and even most of the vehicles transporting natural gas are diesel vehicles, and new types of natural gas vehicles are urgently needed.

Utility model content

The technical problem to be solved by the utility model is to provide a new energy vehicle using natural gas as an alternative fuel, so that the vehicle has a larger carrying capacity of natural gas and enhances safety.

In order to solve the above problems, the utility model provides a new type of natural gas vehicle. The natural gas vehicle includes a frame, a natural gas engine arranged at the front of the frame, a gas storage tank, and a gas tank for supplying the natural gas from the gas storage tank to the natural gas vehicle. The air supply system of the engine, the air storage tank is longitudinally arranged symmetrically between the front and rear wheels outside the frame longitudinal beam.

Because the air storage tank is arranged on the outside of the vehicle frame and between the front and rear wheels, the space between the front and rear wheels (the largest idle and available space on the vehicle) can be fully utilized. On the one hand, the shortcoming that the gas storage tank is placed at the rear of the vehicle and easily collided is avoided. On the other hand, a larger storage space for the gas storage tank is obtained, and the total gas storage capacity of the gas storage tank can be set larger, which is beneficial to increase the load capacity and mileage of the vehicle, and is convenient for use on commercial vehicles such as medium and heavy trucks . Further, the air storage tank is arranged symmetrically on the outside of the longitudinal beam, which is also conducive to the balance of the weight of the whole vehicle and increases the steering stability.

Description of drawings

Fig. 1 is a schematic diagram of the chassis layout of the natural gas vehicle of the present invention.

Fig. 2 is a schematic diagram of the gas supply system of the present invention.

Detailed ways

As shown in Figure 1, a natural gas vehicle according to an embodiment of the present utility model includes a frame, a natural gas engine 1 arranged at the front of the frame, a gas storage tank 3, and a gas tank 3 for supplying natural gas from the gas storage tank to the natural gas engine. The air supply system, the air storage tank is symmetrically arranged longitudinally between the front and rear wheels outside the frame rail. That is, the gas storage tanks are arranged in pairs.

Because the air storage tank is arranged on the outside of the vehicle frame and between the front and rear wheels (this position is the largest idle and available space on the vehicle), the space between the front and rear wheels can be fully utilized. On the one hand, it eliminates the disadvantage that the gas storage tank is placed at the rear of the vehicle and is easy to be collided (especially when the vehicle is rear-ended). On the other hand, a larger space for placing the gas storage tank is obtained, and the total gas storage capacity of the gas storage tank can be set to be larger, which is beneficial to increase the load capacity and mileage of natural gas vehicles, and is convenient for commercial vehicles such as medium and heavy trucks use on. Further, the air storage tank is arranged symmetrically on the outside of the longitudinal beam, which is also conducive to the balance of the weight of the whole vehicle and increases the steering stability.

According to a preferred embodiment of the present invention, an anti-collision protection device is provided outside the gas storage tank 3 to prevent the gas storage tank from being directly collided. Thereby, the safety of the gas storage tank is further increased. For example, the outer edge of the anti-collision device is arranged to be flush with or slightly inside the outer edge of the vehicle compartment.

According to a preferred embodiment of the present utility model, the number of said gas storage tanks is 8, that is, 4 on each side, in two rows and two columns. Therefore, the space between the front and rear wheels on the outer side of the vehicle frame can be better utilized, and the weight of each air storage tank is relatively small, which is convenient for handling, installation and replacement.

As shown in FIG. 1 , a natural gas vehicle according to a preferred embodiment of the present invention includes a brake air reservoir 5 for providing braking force during braking. The brake air storage tank is mounted on the inner side of the frame rail and its longitudinal position (that is, the position on the front and rear of the vehicle) roughly corresponds to the air storage tank 3 . The brake air reservoir is thus well protected.

As can be understood by those of ordinary skill in the art, the gas supply system includes a high-pressure pipeline connecting the gas storage tank and the natural gas engine. In the present invention, the high-pressure pipeline is arranged on the inner side of the vehicle frame longitudinal beam. It should be pointed out that the meaning here is that the main part of the high-pressure pipeline is arranged on the inside of the frame rail, not all on the inside. When a certain device or component of the air supply system (such as the air tank 3) When it is arranged on the outer side of the vehicle frame longitudinal beam, the high-pressure pipeline connected with it needs to extend out of the vehicle frame beam. The high-pressure pipeline (the main part) is arranged on the inner side of the frame rail, which is beneficial to the protection of the high-pressure pipeline.

As shown in Figure 1, a natural gas vehicle according to a preferred embodiment of the present invention includes a battery box 4 and a natural gas control device 2 included in the gas supply system, and the natural gas control device 2 and the battery box 4 are arranged in the longitudinal direction of the vehicle It is located in front of the gas storage tank 3 and on both sides of the vehicle frame respectively, and the natural gas control equipment communicates with the gas storage tank and the natural gas engine through the high-pressure pipeline. The battery box 4 and the natural gas control device 2 are symmetrically arranged left and right, which is beneficial to the balance of the weight of the vehicle and further increases the handling stability. The natural gas control equipment 2 is used for charging the gas storage tank and emptying it for maintenance. As shown in FIG. 2 , the natural gas control device 2 may be composed of a pressure gauge 7 , a high-pressure relief valve 8 and an inflation stop valve 16 connected together.

According to a preferred embodiment of the present utility model, a high-pressure ball valve 9 , a gas volume indicator 10 and a pressure sensor 11 are arranged between the natural gas control equipment 2 and the natural gas engine in the direction of natural gas delivery. The gas volume display 10 and the pressure sensor 11 assembly are used to detect and display the gas volume in the gas storage tank 3, so that the remaining gas volume can be intuitively known, so as to inflate the gas storage tank in time.

According to a preferred embodiment of the present utility model, a high-pressure fine filter 17 is provided between the high-pressure ball valve 9 and the gas volume indicator 10 and pressure sensor 11 assembly, for finely filtering the natural gas supplied to the engine 1 .

According to a preferred embodiment of the present utility model, the multiple (for example, 8) gas storage tanks 3 are connected in parallel through the parallel pipe assembly 14, and then through a parallel overcurrent protection device (for example, shown in FIG. 2 An overcurrent protection integrated valve 6) and a check valve 15 are connected to the natural gas control device 2, wherein the check valve 15 only allows one-way flow from the natural gas control device 2 to the parallel pipe group assembly 14. to the flow. When inflating the air storage tank 3, close the overcurrent protection device 6, and inflate the air storage tank through the one-way valve 15. During normal operation, the overcurrent protection device 6 is opened, and the gas storage tank supplies gas to the natural gas engine 1 through the overcurrent protection device 6. If the gas supply flow is too large (for example, a large amount of leakage occurs suddenly in the high-pressure pipeline), it will be automatically cut off Gas supply to prevent fire and other safety issues caused by a large amount of natural gas leakage.

According to a preferred embodiment of the present utility model, the overcurrent protection device 6 is arranged on the inner side of the vehicle frame longitudinal beam, so as to facilitate the protection of the overcurrent protection device.

A high-pressure solenoid valve 18 may also be provided upstream of the natural gas engine 1 to control the timing of fuel supply to the natural gas engine 1 .

The natural gas vehicle according to the utility model can be implemented on a sanitation vehicle and a water sprinkler, and can also be implemented on a commercial vehicle such as a medium or heavy truck.

The above descriptions are only preferred embodiments of the utility model, and are not used to limit the scope of implementation of the utility model; all equivalent changes and modifications made according to the utility model are covered by the patent scope of the utility model.

Claims (9)

1. A natural gas vehicle, comprising a vehicle frame, a natural gas engine arranged at the front portion of the vehicle frame, a gas storage tank and an air supply system for supplying the natural gas of the gas storage tank to the natural gas engine, characterized in that the The air storage tank is longitudinally arranged symmetrically between the front and rear wheels outside the vehicle frame longitudinal beam. 2. The natural gas vehicle according to claim 1, characterized in that the number of said gas storage tanks is eight. 3 . The natural gas vehicle according to claim 1 , further comprising a brake air storage cylinder installed on the inner side of the frame rail and corresponding to the longitudinal position of the air storage tank. 4 . 4. The natural gas vehicle according to claim 1, wherein the gas supply system comprises a high-pressure pipeline connecting the gas storage tank and the natural gas engine, and the high-pressure pipeline is arranged on the The inner side of the frame rail. 5. The natural gas vehicle according to claim 1, further comprising a battery box and a natural gas control device included in the gas supply system, the natural gas control device and the battery box are located in the storage tank in the longitudinal direction of the vehicle Before the gas tank, it is respectively located on both sides of the vehicle frame, and the natural gas control equipment communicates with the gas storage tank and the natural gas engine through the high-pressure pipeline. 6. The natural gas vehicle according to claim 5, characterized in that, a high-pressure ball valve, a gas volume indicator and a pressure sensor are arranged between the natural gas control device and the natural gas engine. 7. The natural gas vehicle according to claim 6, characterized in that, a high-pressure fine filter is arranged on the high-pressure ball valve, the gas volume indicator and the pressure sensor. 8. The natural gas vehicle according to claim 5, wherein the gas storage tank is connected in parallel through a parallel pipe assembly, and then connected to the natural gas control equipment through a parallel overcurrent protection device and a check valve, Wherein, the one-way valve only allows one-way flow from the natural gas control equipment to the parallel pipe assembly. 9. The natural gas vehicle according to claim 8, wherein the overcurrent protection device is arranged on the inner side of the frame rail.

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