Constant pressure high pressure air storage device

Abstract

The utility model provides a kind of low temperature starting device of constant pressure high pressure air auxiliary engine, constant pressure high pressure air storage device includes gas holder, first piston type pressure regulating valve, second piston type pressure regulating valve, first gas inlet, second gas inlet;First piston type pressure regulating valve, second piston type pressure regulating valve are respectively arranged in gas holder both ends, first gas inlet is connected with first piston type pressure regulating valve, and second gas inlet is connected with second piston type pressure regulating valve.Piston type pressure regulating valve is added, the pressure of new design gas holder under the condition that the same gas release amount in early stage is under the action of spring valve body left shift compressed air keeps higher gas tank pressure, when same residual pressure is 0.6Mpa, gas utilization is higher, adopt variable cross-section tank body, can make pressure increase range greater under same valve body displacement, gas utilization is higher.

Description

Technical Field

[0001] This utility model belongs to the field of engine cold start technology, specifically a constant pressure high-pressure air storage device. Background Technology

[0002] Currently, cold start performance remains a significant technical challenge in traditional internal combustion engine starting systems, especially in low-temperature environments where engine starting reliability is significantly reduced. Existing technologies typically rely on natural air intake or conventional turbocharging for starting, resulting in low air pressure in the intake manifold and insufficient air intake into the cylinders. When the piston reaches top dead center of the compression stroke, the limited compression of the air in the cylinders leads to a slight temperature rise, making it difficult to achieve ideal combustion conditions.

[0003] Specifically, under low-temperature cold start conditions, the lower cylinder temperature can cause the following problems:

[0004] Poor fuel atomization: At low temperatures, the fuel evaporation rate decreases and the number of liquid fuel particles increases, making it difficult to form a uniform combustible mixture with air. This results in localized mixtures that are too rich or too lean, affecting combustion stability.

[0005] Increased ignition energy requirement: Low-temperature air-fuel mixtures have lower molecular activity and require higher ignition energy to ignite. If the spark plug has insufficient energy or carbon deposits, misfire is more likely.

[0006] Slower combustion rate: Under low temperature conditions, the chemical rate of combustion reaction decreases, the flame propagation speed slows down, and it may even extinguish midway due to excessive heat loss from the cylinder wall.

[0007] Residual exhaust gas dilution effect: During cold start, the proportion of residual exhaust gas in the cylinder is relatively high, which further dilutes the fresh air-fuel mixture and reduces its combustibility.

[0008] These issues collectively lead to an increased misfire rate and insufficient torque output during engine startup. When the torque cannot overcome the load, the engine speed gradually decreases, eventually resulting in startup failure. Existing solutions typically rely on improving the ignition system, optimizing the fuel injection strategy, or adding preheating devices, but these methods are either costly or have limited effectiveness, especially in extreme low-temperature environments where they still struggle to completely resolve the misfire problem.

[0009] The above problems can be solved by using high-pressure air-assisted engine cold start, such as... Figure 1 As shown, conventional gas storage tanks use ordinary tank bodies to store gas, but there are still some problems. The pressure of the existing gas storage tank gradually decreases as the amount of gas released increases. When it decreases to 0.6 MPa, the inflation system starts to increase the pressure. The remaining 0.6 MPa pressure in this design is not fully utilized. At the same time, due to the additional consumption of a certain amount of gas during the cold start process, the gas tank capacity is insufficient. Utility Model Content

[0010] This invention provides a constant pressure high-pressure air storage device to solve the problem of difficult engine cold start. It adds a piston-type pressure regulating valve. Under the condition of the same initial air release, the pressure of the newly designed air storage tank is maintained at a higher tank pressure by the valve body moving to the left under the action of the spring. When the same residual pressure is 0.6 MPa, the gas utilization rate is higher. In addition, the use of a variable cross-section tank can make the pressure increase greater under the same valve body displacement, and the gas utilization rate is higher.

[0011] To achieve the above objectives, this utility model provides a constant pressure high-pressure air storage device. The device includes an inlet pipe, a pressure control valve, a high-pressure inlet pipe, and a high-pressure storage unit connected to the high-pressure inlet pipe. One end of the high-pressure inlet pipe is connected to the inlet pipe, and the other end is connected to the high-pressure storage unit. The pressure control valve is mounted on the high-pressure inlet pipe. The high-pressure storage unit includes a storage tank, a first piston-type pressure regulating valve, a second piston-type pressure regulating valve, a first air inlet, and a second air inlet. The first piston-type pressure regulating valve and the second piston-type pressure regulating valve are respectively located at both ends of the storage tank. The first air inlet is connected to the first piston-type pressure regulating valve, and the second air inlet is connected to the second piston-type pressure regulating valve.

[0012] This invention adopts a dual pressure regulating valve structure, that is, pressure regulating valves are set at both ends of the gas storage tank. The pressure and volume are the same as the existing design when the gas is full, that is, the total gas storage capacity is the same. However, under the condition that the initial gas release is the same, the pressure of the newly designed gas storage tank is maintained at a higher gas tank pressure by the valve body moving towards the gas storage tank under the action of the pressure regulating valve. When the remaining pressure is 0.6 MPa, the gas utilization rate is higher.

[0013] Preferably, this invention also includes a filter, which is disposed on the high-pressure inlet pipe and between the pressure control valve and the high-pressure gas storage unit. Using a filter to filter the gas removes impurities, extending the service life of the device.

[0014] Preferably, the gas storage tank, the first piston-type pressure regulating valve, and the second piston-type pressure regulating valve are all constructed with a cylindrical structure. The first piston-type pressure regulating valve and the second piston-type pressure regulating valve have the same diameter, with the diameter of the first piston-type pressure regulating valve being larger than the diameter of the gas storage tank. This utility model uses a variable cross-section tank, meaning that the diameters of both the first and second piston-type pressure regulating valves are larger than the diameter of the gas storage tank. This results in a smaller remaining volume after piston compression, allowing for a greater pressure increase under the same valve body piston displacement, and thus higher gas utilization.

[0015] Preferably, the diameter of the gas storage tank is 0.4 to 0.6 times the diameter of the first piston-type pressure regulating valve. This invention, by using this modified size, ensures the stress design requirements are met, avoids stress concentration in the integral tank body, and simultaneously guarantees a high gas utilization rate.

[0016] Preferably, the first piston-type pressure regulating valve and the second piston-type pressure regulating valve have the same structure. The first piston-type pressure regulating valve includes a cylinder, a piston movably disposed within the cylinder, and a spring connected at one end to the cylinder and at the other end to the piston. Using a spring as the return mechanism and a piston as the valve body results in a simple structure that ensures stable working pressure.

[0017] Preferably, the gas storage tank, the first piston-type pressure regulating valve, and the second piston-type pressure regulating valve are all coaxially arranged, which is simple in structure, easy to manufacture, and low in cost.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The design makes full use of the remaining 0.6 MPa pressure. Under the action of the spring, the valve body moves to the left to compress air and maintain a high pressure in the air tank, thus avoiding the problem of insufficient air tank capacity caused by the additional consumption of a certain amount of gas during the cold start process.

[0020] Using a variable cross-section tank, where the diameter of the pressure regulating valve is larger than that of the gas storage tank, reduces the remaining volume when the pressure regulating valve is close to the gas storage tank. This allows for a greater pressure increase under the same valve displacement, resulting in higher gas utilization.

[0021] Using a dual-valve design allows for a smaller size while maintaining the same amount of usable gas, offering significant advantages for installations in confined spaces.

[0022] This invention requires less power from the air pump, which is beneficial for energy conservation and emission reduction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a gas storage device in the prior art.

[0024] Figure 2 This is a schematic diagram of the structure of a constant pressure high-pressure air storage device according to the present invention.

[0025] Figure 3 This is a schematic diagram of the constant pressure high-pressure air storage device described in this utility model.

[0026] Figure 4 This is a schematic diagram of the constant pressure high-pressure air storage device of this utility model in the spring extension state.

[0027] Figure 5This is an enlarged view of the structure of the first piston-type pressure regulating valve described in this utility model.

[0028] In the diagram: 1-Inlet pipe, 2-Pressure control valve, 3-High-pressure inlet pipe, 4-Constant pressure high-pressure air storage device, 401-Storage tank, 402-First piston-type pressure regulating valve, 4021-Cylinder, 4022-Piston, 4023-Spring, 403-Second piston-type pressure regulating valve, 404-First air inlet, 405-Second air inlet, 5-Filter. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0030] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Example 1:

[0032] against Figure 1 In the present invention, a constant pressure high-pressure air storage device is provided to address the problem of insufficient gas utilization in existing technologies. Figure 2 As shown, the system includes an air inlet pipe 1, a pressure control valve 2, and a high-pressure air inlet pipe 3. It also includes a high-pressure gas storage unit 4 connected to the high-pressure air inlet pipe 3. One end of the high-pressure air inlet pipe 3 is connected to the air inlet pipe 1, and the other end is connected to the high-pressure gas storage unit 4. The pressure control valve 2 is installed on the high-pressure air inlet pipe 3. The high-pressure gas storage unit 4 includes a gas storage tank 401, a first piston-type pressure regulating valve 402, a second piston-type pressure regulating valve 403, a first air inlet 404, and a second air inlet 405. The first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 are respectively installed at both ends of the gas storage tank 401. The first air inlet 404 is connected to the first piston-type pressure regulating valve 402, and the second air inlet 405 is connected to the second piston-type pressure regulating valve 403.

[0033] This embodiment adopts a dual pressure regulating valve structure, that is, a first piston-type pressure regulating valve 402 and a second piston-type pressure regulating valve 403 are provided at both ends of the gas storage tank 401. When high-pressure gas needs to be supplied, the pressure control valve 2 is opened, and the pistons 4022 of the first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 in the high-pressure gas storage unit 4 move towards the gas storage tank 401. The high-pressure gas enters the inlet pipe 1 through the high-pressure inlet pipe 3.

[0034] In this embodiment, the pressure and volume are the same as the existing design when the gas is full, that is, the total gas storage capacity is the same. However, with the same initial gas release capacity, the pressure of the newly designed gas storage tank 401 is maintained at a higher tank pressure by the valve body moving towards the gas storage tank 401 under the action of the pressure regulating valve. When the remaining pressure is 0.6 MPa, the gas utilization rate is higher.

[0035] Example 2:

[0036] like Figures 2-5 As shown, this embodiment provides a constant pressure high-pressure air storage device, including an air inlet pipe 1, a pressure control valve 2, a high-pressure air inlet pipe 3, and a high-pressure air storage unit 4 connected to the high-pressure air inlet pipe 3. One end of the high-pressure air inlet pipe 3 is connected to the air inlet pipe 1 and the other end is connected to the high-pressure air storage unit 4. The pressure control valve 2 is disposed on the high-pressure air inlet pipe 3. The high-pressure air storage unit 4 includes an air storage tank 401, a first piston-type pressure regulating valve 402, a second piston-type pressure regulating valve 403, a first air inlet 404, and a second air inlet 405. The first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 are respectively disposed at both ends of the air storage tank 401. The first air inlet 404 is connected to the first piston-type pressure regulating valve 402, and the second air inlet 405 is connected to the second piston-type pressure regulating valve 403.

[0037] like Figure 3 As shown, in this embodiment, the first air inlet 404 and the second air inlet 405 are both located away from the air storage tank 401. That is, the first air inlet 404 is located outside the first piston-type pressure regulating valve 402, and the second air inlet 405 is located outside the second piston-type pressure regulating valve 403, for communicating with the atmosphere.

[0038] like Figure 2 As shown, in this embodiment, the present invention also includes a filter 5, which is disposed on the high-pressure air inlet pipe 3 and between the pressure control valve 2 and the high-pressure gas storage unit 4. The filter 5 filters the high-pressure gas exiting from the gas storage tank 401.

[0039] like Figure 4 As shown, in this embodiment, the gas storage tank 401, the first piston-type pressure regulating valve 402, and the second piston-type pressure regulating valve 403 are all constructed as cylindrical structures. The first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 have the same diameter, and the diameter of the first piston-type pressure regulating valve 402 is larger than the diameter of the gas storage tank 401.

[0040] In this embodiment, the cylinder 4021 of the gas storage tank 401, the first piston-type pressure regulating valve 402, and the second piston-type pressure regulating valve 403 is an integral structure, which is compact, strong, and has good sealing performance. The entire high-pressure gas storage unit 4 has a dumbbell-shaped structure.

[0041] In this embodiment, the diameter of the gas storage tank 401 is 0.4 to 0.6 times the diameter of the first piston-type pressure regulating valve 402.

[0042] like Figure 5 As shown, in this embodiment, the first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 have the same structure. The first piston-type pressure regulating valve 402 includes a cylinder 4021, a piston 4022 movably disposed inside the cylinder 4021, and a spring 4023 connected at one end to the cylinder 4021 and at the other end to the piston 4022. One end of the spring 4023 is connected to the piston 4022, and the other end is connected to the inner side of the side wall of the cylinder 4021.

[0043] like Figure 3 As shown, the first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 are in the upper position when they are closest to the gas storage tank 401, and the spring 4023 is in a compressed state at this time.

[0044] like Figure 4 and 5 As shown, when the first piston-type pressure regulating valve 402 and the second piston-type pressure regulating valve 403 are in the position furthest from the gas storage tank 401, it is in the lower position, and at this time the spring 4023 is in the extended state.

[0045] The upper position is the maximum movement position of the valve body under the elastic force of spring 4023; the lower position is the valve body compressed to its limit position under the pressure of high-pressure gas.

[0046] In this embodiment, the gas storage tank 401, the first piston-type pressure regulating valve 402, and the second piston-type pressure regulating valve 403 are arranged coaxially.

Claims

1. A constant pressure high-pressure air storage device, comprising an air inlet pipe (1), a pressure control valve (2), and a high-pressure air inlet pipe (3), characterized in that... It also includes a high-pressure gas storage unit (4) connected to the high-pressure air inlet pipe (3). One end of the high-pressure air inlet pipe (3) is connected to the air inlet pipe (1) and the other end is connected to the high-pressure gas storage unit (4). The pressure control valve (2) is installed on the high-pressure air inlet pipe (3). The high-pressure gas storage unit (4) includes a gas storage tank (401), a first piston-type pressure regulating valve (402), a second piston-type pressure regulating valve (403), a first air inlet (404), and a second air inlet (405). The first piston-type pressure regulating valve (402) and the second piston-type pressure regulating valve (403) are respectively installed at both ends of the gas storage tank (401). The first air inlet (404) is connected to the first piston-type pressure regulating valve (402), and the second air inlet (405) is connected to the second piston-type pressure regulating valve (403).

2. The constant pressure high-pressure air storage device according to claim 1, characterized in that: It also includes a filter (5), which is disposed on the high-pressure air inlet pipe (3) and is disposed between the pressure control valve (2) and the high-pressure air storage unit (4).

3. The constant pressure high-pressure air storage device according to claim 1, characterized in that: The gas storage tank (401), the first piston-type pressure regulating valve (402), and the second piston-type pressure regulating valve (403) are all constructed as cylindrical structures. The first piston-type pressure regulating valve (402) and the second piston-type pressure regulating valve (403) have the same diameter, and the diameter of the first piston-type pressure regulating valve (402) is larger than the diameter of the gas storage tank (401).

4. The constant pressure high-pressure air storage device according to claim 1, characterized in that: The diameter of the gas storage tank (401) is 0.4 to 0.6 times the diameter of the first piston-type pressure regulating valve (402).

5. A constant pressure high-pressure air storage device according to claim 1, characterized in that: The first piston-type pressure regulating valve (402) and the second piston-type pressure regulating valve (403) have the same structure. The first piston-type pressure regulating valve (402) includes a cylinder (4021), a piston (4022) movably disposed in the cylinder (4021), and a spring (4023) with one end connected to the cylinder (4021) and the other end connected to the piston (4022).

6. The constant pressure high-pressure air storage device according to claim 1, characterized in that: The gas storage tank (401), the first piston-type pressure regulating valve (402), and the second piston-type pressure regulating valve (403) are all coaxially arranged.

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