CN204851511U - Fuel pressure regulater - Google Patents

Abstract

The utility model discloses a fuel oil pressure regulator, the main point of which is the technical scheme comprising an upper valve body, a lower valve body, a valve and a filter net, an oil outlet is arranged on the end surface of the lower valve body, and the feature is that: the The filter screen is axially fixedly sleeved on the valve, and the filter screen abuts against the outer end surface of the lower valve body. The filter screen is provided with filter ports, and the number of the filter ports is the same as the number of oil outlets. A metal mesh is fixedly arranged on the filter port, the shape of the oil outlet and the filter port are arc-shaped, the arc length of the oil outlet is less than the arc length of the filter port, and the oil outlet is smaller The arc diameter is greater than or equal to the smaller arc diameter of the filter port, and the larger arc diameter of the oil outlet is smaller than or equal to the larger arc diameter of the filter port, which achieves the filtering function and does not easily cause the oil outlet to become smaller.

Description

fuel pressure regulator

technical field

The utility model relates to a pressure regulator, in particular to a fuel pressure regulator.

Background technique

The oil pressure regulator is referred to as the oil return valve, which is the fuel pressure regulating part inside the fuel system, and is controlled by the system oil pressure and the intake branch pipe pressure (negative pressure). Its function is to automatically maintain the fuel pressure of the entire oil pressure system at a certain value, so that the difference between the oil pressure in the fuel supply main pipe and the pressure of the intake branch pipe is a constant value (generally 250-300kPa). The fuel pressure regulator is one of the common components of the fuel injection system of EFI vehicles.

Its working principle: the oil pressure is coordinated by the spring and the vacuum degree of the air chamber. When the oil pressure is higher than the standard value, the high-pressure fuel will move the diaphragm upward, the ball valve will open, and the excess fuel will flow back into the fuel tank through the oil return pipe; When the pressure is lower than the standard value, the spring will press down the diaphragm to close the ball valve and stop the oil return. The function of the pressure regulator is to keep the pressure in the oil circuit constant. If the oil pressure is too low, the fuel injection of the injector will be too weak or not, and if the oil pressure is too high, the oil circuit will be damaged or the injector will be damaged. There is a diaphragm inside the pressure regulator, which plays the role of controlling the opening and closing of the pressure valve. When the oil pressure is lower than a certain value, the pressure valve is closed, and the pressure in the oil circuit is increased by the oil pump. When it exceeds the specified pressure, The diaphragm opens, and the over-pressurized fuel flows back to the fuel tank through the return line, which acts as a decompressor.

The Chinese patent No. CN201120294625.5 discloses a pressure regulator, its specific structure: upper valve body, lower valve body, valve, first valve ball, filter screen, sealing diaphragm, second valve ball, valve ball seat, spring seat, small spring and pagoda spring, the upper valve body is respectively provided with an oil inlet and an oil outlet, the lower valve body is connected with the upper valve body; the sealing diaphragm is arranged on the connection between the upper valve body and the lower valve body A fuel chamber is formed with the inner cavity of the upper valve, and a spring chamber is formed with the inner cavity of the lower valve; the valve is set in the fuel chamber and connected with the oil outlet; the first valve ball is connected with the valve at the oil outlet; the filter The net is set in the fuel chamber and socketed to the bottom of the valve; the valve ball seat is socketed and connected with the sealing diaphragm; the second valve ball and the small spring are respectively arranged in the valve ball seat, and the small spring is connected to the bottom of the second valve ball, and the second The top of the spring is connected to the valve; the spring seat and the pagoda spring are arranged in the spring chamber, and the spring seat and the valve ball seat are socketed and connected, and the pagoda spring is connected to the spring seat.

In the above-mentioned patents, a filter screen is set to prevent solid matter from entering the pressure regulator and affecting its service life. Since the filter screen is set in the fuel chamber, and the filter screen is only sleeved on the valve, this allows the filter screen to wrap around the axis of the valve. Rotation, which makes it difficult for the mesh holes on the filter screen to correspond to the oil inlet on the upper valve body during the installation process of the filter screen, which increases the difficulty of the installation of the pressure regulator, and if the filter screen is used during use Rotation will also cause part of the oil inlet to be blocked, and since the filter screen is arranged in the fuel chamber, it is difficult to manually adjust the filter screen. As we all know, when the pressure in the pipeline is constant, the smaller the cross-sectional area of the pipeline, the greater the pressure in the pipeline. Similarly, when the oil inlet of the pressure regulator becomes smaller, under the same pressure, the pressure in the fuel chamber will increase. The pressure will increase, which will cause the oil in the pressure regulator to flow out from the oil outlet in advance, and the function of the pressure regulator is to keep the pressure in the oil circuit constant, and the above patent will make the oil pressure lower and cause the injector to spray The oil becomes weak, affecting the effectiveness of the pressure regulator.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a fuel pressure regulator which has a filtering function and is not easy to cause the oil outlet to become smaller.

In order to achieve the above purpose, the utility model provides the following technical solutions: a fuel pressure regulator, including an upper valve body, a lower valve body, a valve and a filter screen, the end surface of the lower valve body is provided with an oil outlet, the The filter screen is fixedly sleeved on the valve in the axial direction, and the filter screen is in contact with the outer end surface of the lower valve body. The filter screen is provided with filter ports, and the number of the filter ports is the same as the number of oil outlets. A metal mesh is fixedly arranged on the filter port, the shape of the oil outlet and the filter port are arc-shaped, the arc length of the oil outlet is less than the arc length of the filter port, and the oil outlet is smaller The arc diameter is greater than or equal to the smaller arc diameter of the filter port, and the larger arc diameter of the oil outlet is smaller than or equal to the larger arc diameter of the filter port.

By adopting the above-mentioned technical scheme, firstly, the filter screen is set outside the fuel pressure regulator. If the filter screen rotates during use and some fuel ports are blocked, it can be adjusted conveniently. The setting that the filter port is larger than the fuel port can prevent the filter screen from being readjusted when it is rotated slightly, reducing the number of adjustments.

The utility model is further set as: the edge of the end face of the filter screen is provided with a convex ring, the convex ring is sleeved on the lower valve body, and a bushing is also sleeved on the outer surface of the lower valve body, the convex ring and the bushing A sealing ring is provided for the limit between the sets, and the sealing ring is sleeved on the lower valve body.

By adopting the above-mentioned technical solution, the sealing ring can be prevented from being provided with a limiting groove on the lower valve body by the sealing ring between the convex ring and the bushing, thereby reducing production difficulty.

The utility model is further configured as follows: the filter screen is provided with a chamfer on the edge of one end face of the lower valve body, and the angle of the chamfer is 45°.

By adopting the above technical solution, the chamfer setting can facilitate the installation of the fuel pressure regulator.

The utility model is further configured as follows: the bushing and the filter net are made of acrylonitrile-butadiene-styrene plastic, and the sealing ring is made of hexafluorinated fluorine rubber.

By adopting the above technical scheme, the acrylonitrile-butadiene-styrene plastic has the advantages of high impact resistance, high heat resistance, flame retardancy, wear resistance, chemical stability, high hardness and good toughness. Finally, if the filter screen and bushing are damaged and corroded, it is troublesome to replace, so acrylonitrile-butadiene-styrene plastic is used as a material to improve the service life of the filter screen and bushing; and the fuel pressure regulator is used in automobiles , so it is necessary to improve the heat resistance of the sealing ring, and the hexafluorinated fluororubber has good high temperature resistance.

To sum up, the fuel pressure regulator of the present invention has the advantages of filtering function, long service life and the oil outlet is not easy to be blocked.

Description of drawings

Fig. 1 is a structural schematic diagram of a fuel pressure regulator;

Figure 2 is a side view of the fuel pressure regulator;

Figure 3 is a front view of the fuel pressure regulator.

Reference signs: 1, upper valve body; 2, lower valve body; 3, bushing; 4, sealing ring; 5, filter screen; 51, filter port; 52, metal mesh; 53, convex ring; 6, valve; 7. Sealing ring.

Detailed ways

Referring to Fig. 1 to Fig. 3, the fuel pressure regulator of the present utility model will be further described.

As shown in Figure 1 to Figure 3, it is an embodiment of the fuel pressure regulator of the present invention, which includes an upper valve body, a lower valve body, a valve and a filter screen, and an oil outlet is arranged on the end surface of the lower valve body, The filter screen is sleeved on the valve and the filter screen is axially fixed by the valve. The filter screen abuts against the outer end surface of the lower valve body. The filter screen is provided with filter ports. The number of filter ports is the same as the number of oil outlets.

In the utility model, the number of the filter port and the fuel port is set to four, and a metal mesh is fixedly arranged on the filter port, and the filter mesh is made of plastic material. The net can be set integrally with the filtering net.

Both the oil outlet and the filter port are arc-shaped, the arc length of the oil outlet is less than the arc length of the filter port, and the smaller arc diameter of the oil outlet is greater than or equal to the smaller arc diameter of the filter port, the oil outlet The larger arc diameter of the port is less than or equal to the larger arc diameter of the filter port. By adopting the above-mentioned technical scheme, firstly, the filter screen is set outside the fuel pressure regulator. If the filter screen rotates during use and some fuel ports are blocked, it can be adjusted conveniently. The setting that the filter port is larger than the fuel port can prevent the filter screen from being readjusted when it is slightly rotated, reducing the number of adjustments.

As shown in Figure 2, a protruding ring is provided on the edge of the end face of the filter screen, and the protruding ring is sleeved on the lower valve body, and a bushing is also sleeved on the outer side of the lower valve body. connected to the lower valve body. The sealing ring between the protruding ring and the bushing can avoid setting a limiting groove on the lower valve body to limit the sealing ring, thereby reducing production difficulty.

Further, a chamfer is provided on the end face edge of the filter net facing away from the lower valve body, and the chamfer angle is 45°. The chamfer setting can facilitate the installation of the fuel pressure regulator.

In addition, the bushing and filter screen are made of acrylonitrile-butadiene-styrene plastic, and the sealing ring is made of hexafluorinated fluororubber. Acrylonitrile-butadiene-styrene plastic has high impact resistance, It has the advantages of high heat resistance, flame retardancy, wear resistance, chemical stability, high hardness and good toughness. After the fuel pressure regulator is installed, if the filter screen and bushing are damaged or corroded, it will be troublesome to replace. Therefore, acrylonitrile- Butadiene-styrene plastic is used as a material to improve the service life of filters and bushings; while fuel pressure regulators are used in automobiles, it is necessary to improve the heat resistance of sealing rings, and hexafluorinated fluororubber has Good high temperature resistance.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (4)

1. a fuel pressure regulator, comprise upper valve body, lower valve body, valve and filter screen, the end face of above-mentioned lower valve body is provided with oil outlet, it is characterized in that: described filter screen axial restraint is socketed on valve, described filter screen is connected on the exterior edge face of lower valve body, described filter screen is provided with filtration mouth, the quantity of described filtration mouth is identical with the quantity of oil outlet, described filtration mouth is fixedly installed wire netting, described oil outlet and filtration mouth-shaped are all in arc line shaped, the arc length of described oil outlet is less than the arc length of filtering mouth, and the less arc dia of described oil outlet is more than or equal to the less arc dia filtering mouth, the larger arc dia of described oil outlet is less than or equal to the larger arc dia filtering mouth.

2. fuel pressure regulator according to claim 1, it is characterized in that: the end face edge of described filter screen is provided with bulge loop, described bulge loop is socketed on lower valve body, described lower valve body outer side surface is also socketed with lining, spacing between described bulge loop and lining have seal ring, and described seal ring is socketed on lower valve body.

3. fuel pressure regulator according to claim 1, is characterized in that: described filter screen descends one end end face edge of valve body to be provided with chamfering dorsad, and described chamfer angle is 45 °.

4. fuel pressure regulator according to claim 2, is characterized in that: described lining and filter screen adopt acrylonitrile-butadiene-styrene (ABS) plastics to make, and described seal ring adopts the fluorine unpigmented rubber of lithium system to make.