CN220353955U - Gas injection device and gas supply system - Google Patents

Abstract

The utility model provides a gas injection device and a gas supply system. The gas injection device includes: a first valve including a first inlet port, a first outlet port, and a first valve element for adjusting opening and closing of a first flow path between the first inlet port and the first outlet port; a second valve including a second inlet port, a second outlet port, and a second valve element for adjusting opening and closing of a second flow path between the second inlet port and the second outlet port; and a confluence member including first and second ports connected to the first and second outlet ports of the first and second valves, respectively, and an outlet port communicating with the first and second ports. The gas injection device and the gas supply system can meet the air inlet requirement of the cylinder, simplify the structure and reduce the number and weight of parts.

Description

Gas injection device and gas supply system

Technical Field

The present utility model relates to the field of engines, and more particularly to a gas injection device and a gas supply system for an engine, in particular an engine fuelled with natural gas or hydrogen.

Background

As emissions standards become more stringent, engine technology employing new fuels such as hydrogen and natural gas is increasingly gaining attention. When natural gas is used as fuel, in order to meet the power demand of the engine, the intake air amount per cylinder needs to be increased, and even two nozzles need to be provided for a single cylinder, which occupies the space inside the engine, increases the engine weight, and increases the manufacturing cost.

Disclosure of Invention

The object of the present application is to solve or at least alleviate the problems of the prior art.

According to an aspect, there is provided a gas injection device connected between a gas intake manifold and an engine block, the gas injection device comprising:

a first valve including a first inlet port, a first outlet port, and a first valve element for adjusting opening and closing of a first flow path between the first inlet port and the first outlet port;

a second valve including a second inlet port, a second outlet port, and a second valve element for adjusting opening and closing of a second flow path between the second inlet port and the second outlet port; and

a manifold including first and second ports connected to the first and second outlet ports of the first and second valves, respectively, and an outlet port in communication with the first and second ports.

Optionally, in the gas injection device, the confluence member includes a first recess for receiving an outlet end of the first valve, a second recess for receiving an outlet end of the second valve, and a Y-shaped flow path communicating with the first recess, the second recess, and the outlet port.

Optionally, in the gas injection device, the gas injection device further comprises a first inlet end cover and a second inlet end cover, wherein the first inlet end cover and the second inlet end cover respectively comprise a notch for receiving an inlet end of the first valve and an inlet end of the second valve, and an extrados for fitting with a gas intake manifold, and the extrados comprises an opening for abutting with a gas outlet of the intake manifold.

Optionally, in the gas injection device, the gas injection device further includes a first connector connecting the first inlet end cap to the junction piece and a second connector connecting the second inlet end cap to the junction piece, such that the first valve is disposed between the first inlet end cap and the first recess of the junction piece, and the second valve is disposed between the second inlet end cap and the second recess of the junction piece.

Optionally, in the gas injection device, a shock pad is respectively disposed between the first valve and the first notch of the first inlet end cover and the first notch of the converging piece, and a shock pad is respectively disposed between the second valve and the second notch of the second inlet end cover and the second notch of the converging piece.

Optionally, in the gas injection device, the first connecting member and the second connecting member are U-shaped clamping plates, the first inlet end cover, the second inlet end cover, and the first recess and the second recess of the confluence member each include a flange, the first connecting member is connected to the flange of the first inlet end cover and the flange of the first recess and surrounds the first valve, and the second connecting member is connected to the flange of the second inlet end cover and the flange of the second recess and surrounds the second valve.

Optionally, in the gas injection device, the gas injection device further includes a nozzle connected to the outlet port, where the nozzle is a rigid nozzle or a nozzle including a flexible pipeline.

Optionally, in the gas injection device, the confluence member includes a fixed mounting hole for being fixedly connected to an engine.

There is also provided a fuel gas supply system for supplying fuel to an engine cylinder of a vehicle, comprising: an intake manifold comprising a gas inlet and a plurality of pairs of gas outlets distributed along a length of the intake manifold;

the gas injection device according to various embodiments connected between each pair of gas outlets of the intake manifold and a corresponding cylinder, wherein the first and second inlet ports of the gas injection device are connected to a pair of gas outlets on the intake manifold, and the gas injection device outlet ports are connected to nozzles aligned with the corresponding cylinder.

Optionally, the intake manifold is provided with a suspension fixture at a position where it is connected to the gas injection device for fixed connection to an engine.

The gas injection device and the gas supply system can meet the air inlet requirement of the cylinder, simplify the structure and reduce the number and weight of parts.

Drawings

The disclosure of the present application will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. Moreover, like numerals in the figures are used to designate like parts, wherein:

FIG. 1 shows a view of a gas supply system according to an embodiment of the utility model;

fig. 2 shows a perspective view of a gas injection apparatus according to an embodiment of the present utility model;

FIG. 3 illustrates a perspective view of a gas injection apparatus with valves and nozzles removed, according to an embodiment of the present utility model;

FIG. 4 shows a cross-sectional view of the assembly of FIG. 3;

fig. 5 shows a longitudinal section of the busbar; and

fig. 6 shows a schematic longitudinal section of a gas supply system according to an embodiment of the utility model.

Detailed Description

Referring first to fig. 1, there is shown a gas supply system for supplying gas to cylinders of a vehicle engine, particularly a natural gas or hydrogen fueled engine. The gas supply system includes: an intake manifold 1 comprising a gas inlet 11 and a plurality of pairs of gas outlets 141,142 (referenced in fig. 6) distributed along the length of the intake manifold; the gas injection device 2 according to various embodiments of the present utility model, which is connected between each pair of gas outlets of the intake manifold and the corresponding cylinder, wherein the first inlet port and the second inlet port of the gas injection device are connected to a pair of gas outlets on the intake manifold, and the gas injection device outlet port is connected to a nozzle 29 aligned with the corresponding cylinder. Although not shown, each nozzle 29 is aligned with one cylinder. In the illustrated embodiment, there are 6 gas injection devices to inject gas into 6 cylinders in a time series, and the intake manifold 1 may have a length of about 0.9 m. Further, the intake manifold 1 is provided with a suspension mount 13 at a position where it is connected to the gas injection device 2 for fixed connection to the engine. As shown in fig. 6, the suspension mount 13 has a cushion pad 131 around the mounting hole.

The specific structure of the gas injection apparatus according to the embodiment of the present utility model will be described in detail with continued reference to fig. 2 to 6. Referring to fig. 6, the spraying device according to an embodiment of the present utility model includes: a first valve 21, the first valve 21 including a first inlet port 211, a first outlet port 212, and a first valve body for regulating opening and closing of a first flow path 210 between the first inlet port and the first outlet port; a second valve 22, wherein the second valve 22 comprises a second inlet port 221, a second outlet port 222, and a second valve core for adjusting the opening and closing of a second flow path 220 between the second inlet port and the second outlet port; and a confluence member 23 (see fig. 3 and 5 in particular), the confluence member 23 including first and second ports 61 and 62 connected to the first and second outlet ports of the first and second valves, respectively, and an outlet port 63 communicating with the first and second ports 61 and 62. The spools of the first and second valves are not shown for clarity. Thus, the injection device according to an embodiment of the present utility model integrates two valves and is connected to the nozzle through the confluence member 23. The design can meet the air inlet requirement of the air cylinder, simplify the structure and reduce the number and weight of parts. As shown in fig. 2, the first and second valves further comprise sensor means 211 to detect the temperature and pressure of the gas therein, etc.

Referring to fig. 5, in some embodiments, the manifold 23 includes a first recess 232 for receiving the outlet end of the first valve, a second recess 233 for receiving the outlet end of the second valve, and a Y-shaped flow path 235 in communication with the first recess, the second recess, and the outlet port 63. In the embodiment shown, the Y-shaped flow path 235 extends to the bottom edges of the first recess 232 and the second recess 233. In some embodiments, the outlet port 63 of the manifold 23 includes a flange 236 for connection with the nozzle 29. In some embodiments, the manifold 23 includes a fixed mounting hole 231 for a fixed connection to the engine, thereby securing the injection device at that location. In the illustrated embodiment, the fixed mounting aperture 231 is between two bifurcated legs of the Y-shaped flow path.

In some embodiments, the gas injection device further comprises a first inlet end cap 241 and a second inlet end cap 242, wherein the first inlet end cap 241 and the second inlet end cap 242 respectively comprise a recess (the back side of the end cap in fig. 3 is the recess) for receiving the inlet end of the first valve and the inlet end of the second valve, and an extrados 43 for fitting with the gas intake manifold, the extrados being provided with an opening 41. The gas injection device may be joined, e.g., welded, to the intake manifold 1 via the extrados 43 of the first and second inlet end caps 241, 242 such that the gas outlets 141,142 of the intake manifold 1 are aligned with the openings 41 of the first and second inlet end caps 241, 242. In some embodiments, the first and second inlet end caps 241, 242 further comprise a flange 44. As best seen in fig. 4, flange 44 includes two-sided snap teeth 441.

In some embodiments, the gas injection apparatus further includes a first connector 251 connecting the first inlet end cap 241 to the manifold 23 and a second connector 252 connecting the second inlet end cap 242 to the manifold 23 such that the first valve 21 is disposed between the first inlet end cap 241 and the first recess 232 of the manifold 23 and the second valve 22 is disposed between the second inlet end cap 242 and the second recess 233 of the manifold 23. In some embodiments, as shown in fig. 3 and 4, the first and second connectors 251, 252 are each clevis plates, the first and second inlet end caps include flanges 44, and the first and second notches of the manifold 23 include flanges 321,322, the first connector 251 is connected to the flanges 44 of the first inlet end cap and the flanges 321 of the first notch and surrounds the first valve 21, and the second connector 252 is connected to the flanges 44 of the second inlet end cap and the flanges 322 of the second notch and surrounds the second valve 22. More specifically, the bottom of the first and second connectors 251, 252 include flanges 51 to engage with the flanges 321,322 of the first and second recesses, respectively, and the side walls of the top of the first and second connectors 251, 252 include slots thereon to engage with the snap teeth on either side of the flanges 44 of the first and second inlet end caps 241, 242.

With continued reference to FIG. 6, in some embodiments, shock absorbing pads 71,72 are disposed between the first valve 21 and the first inlet end cap 241 and the first recess of the manifold, respectively, and shock absorbing pads are also disposed between the second valve and the second inlet end cap and the second recess of the manifold, thereby effectively mitigating shock of the first and second valves with the engine. Thus, in some embodiments, specific assembly of the gas injection apparatus may include, for example: the shock pad 72 is disposed in the first and second recesses of the confluence member, then the first and second valves 21 and 22 and the shock pad 71 and the first and second inlet caps 241 and 242 are sequentially placed, and finally the first connection member 251 is installed from one side (from top to bottom in fig. 4) and the second connection member 252 is installed from the other side (from bottom to top in fig. 4). The U-shaped connector has a certain deformability to expand and contract along the diverging clamping teeth 441 on both sides of the flange 44, so that the clamping teeth 441 enter the clamping grooves to be clamped, and finally the nozzle 29 is mounted to the outlet port of the converging member. The clamping teeth 441 of the first and second inlet end caps 241 and 242 are disposed in opposite directions such that the first and second connectors 251 and 252 are mounted in opposite directions, which may make the gas injection device more compact. In some embodiments, the nozzles 29 may be rigid nozzles or may include flexible tubing to facilitate alignment with the cylinders so that accuracy requirements for the location of the opening of the gas outlets 141,142 may be reduced.

The specific embodiments of the present application have been described above merely to provide a more clear description of the principles of the present application, in which individual components are explicitly shown or described so as to provide a more readily understood principles of the present utility model. Various modifications or variations of this application may be readily made by those skilled in the art without departing from the scope of this application. It is to be understood that such modifications and variations are intended to be included within the scope of the present application.

Claims (10)

1. A gas injection device connected between a gas intake manifold (1) and an engine block, characterized in that it comprises:

a first valve (21) including a first inlet port (211), a first outlet port (212), and a first valve element for adjusting opening and closing of a first flow path (210) between the first inlet port and the first outlet port;

a second valve (22) including a second inlet port (221), a second outlet port (222), and a second valve element for adjusting opening and closing of a second flow path (220) between the second inlet port and the second outlet port; and

-a junction piece (23) comprising a first port (61) and a second port (62) connected to a first outlet port (212) of the first valve and to a second outlet port (222) of the second valve, respectively, and an outlet port (63) communicating with the first port (61) and the second port (62).

2. The gas injection device of claim 1, wherein the manifold (23) comprises a first recess (232) for receiving an outlet end of a first valve, a second recess (233) for receiving an outlet end of a second valve, and a Y-shaped flow path (235) in communication with the first recess, the second recess, and the outlet port.

3. The gas injection device of claim 2, further comprising a first inlet end cap (241) and a second inlet end cap (242), wherein the first inlet end cap (241) and the second inlet end cap (242) comprise a recess for receiving an inlet end of the first valve and an inlet end of the second valve, respectively, and an extrados (43) for conforming to a gas intake manifold, the extrados (43) comprising an opening (41) thereon for interfacing with a gas outlet of the intake manifold.

4. A gas injection device according to claim 3, further comprising a first connection (251) connecting the first inlet end cap (241) to the junction piece (23) and a second connection (252) connecting the second inlet end cap (242) to the junction piece (23), such that the first valve (21) is arranged between the first inlet end cap (241) and the first recess (232) of the junction piece and the second valve (22) is arranged between the second inlet end cap (242) and the second recess (233) of the junction piece.

5. The gas injection device of claim 4, wherein shock pads (72, 71) are provided between the first valve (21) and the first inlet end cap (241) and the first recess (232) of the manifold, respectively, and shock pads are provided between the second valve (22) and the second inlet end cap (242) and the second recess (233) of the manifold, respectively.

6. The gas injection device of claim 4, wherein the first and second connectors (251, 252) are clevis plates, the first and second inlet end caps (241, 242) and the first and second notches (232, 233) of the manifold (23) each include a flange, the first connector (251) is connected to the flange of the first inlet end cap (241) and the flange of the first notch (232) and surrounds the first valve (21), and the second connector (252) is connected to the flange of the second inlet end cap (242) and the flange of the second notch (233) and surrounds the second valve (22).

7. The gas injection device according to any one of claims 1-6, further comprising a nozzle (29) connected to the outlet port (63), wherein the nozzle (29) is a rigid nozzle or a nozzle comprising a flexible conduit.

8. The gas injection device according to any one of claims 1-6, characterized in that the manifold (23) comprises a fixed mounting hole (231) for a fixed connection to an engine.

9. A fuel gas supply system for supplying air to an engine cylinder of a vehicle, comprising:

an intake manifold (1), the intake manifold (1) comprising a gas inlet (11) and a plurality of pairs of gas outlets (141, 142) distributed along the length of the intake manifold;

the gas injection device of any one of claims 1-8, connected between each pair of gas outlets (141, 142) of the intake manifold and a corresponding cylinder, wherein the first inlet port (211) and the second inlet port (221) of the gas injection device are connected to a pair of gas outlets (141, 142) on the intake manifold, the gas injection device outlet ports being connected to nozzles (29) aligned with the corresponding cylinder.

10. A gas supply system according to claim 9, characterized in that the inlet manifold (1) is provided with a suspension fixture (13) at the location of connection with the gas injection device (2) for a fixed connection to an engine.