Complete machine arrangement structure of novel dual-fuel injection system

Abstract

The utility model discloses a complete machine arrangement structure of a novel dual-fuel injection system. The complete machine arrangement structure comprises at least one low-carbon gas fuel gas rail, a low-carbon gas fuel nozzle, at least one diesel oil high-pressure common rail and a diesel oil nozzle. The low-carbon gas fuel nozzles are arranged at the air cylinders, and each low-carbon gas fuel nozzle is communicated with a corresponding gas outlet of at least one low-carbon gas fuel gas rail through a gas fuel pipeline; the diesel nozzles are arranged at the air cylinders, and each diesel nozzle is communicated with a corresponding oil outlet of at least one diesel high-pressure common rail through a diesel high-pressure pipeline; wherein at least one low-carbon gas fuel gas rail provides clean gas for each low-carbon gas fuel nozzle to be injected into each air cylinder, and at least one diesel oil high-pressure common rail provides high-pressure fuel oil for each fuel oil nozzle to be injected into each air cylinder. Therefore, the device can be suitable for mixed application of liquid fuel and gas fuel, synchronous mixed combustion of various low-carbon fuels and diesel oil is met, the heat efficiency is improved with the most economical means, and carbon emission is reduced.

Description

Technical Field

[0001] The utility model relates to the field of engine design and manufacturing, and particularly to an overall layout structure of a new type of dual-fuel injection system. Background Art

[0002] The function of an engine is to provide power output for a whole vehicle or other power conversion mechanisms. Due to market demands and technical bottlenecks, current engines basically adopt single-fuel systems, and common fuels are diesel, gasoline, and natural gas. Subsequently, with the update of regulations and the development of new technologies, it has become difficult for single fuels to meet emission requirements, and the demand for low-carbon fuels has gradually increased. This patent is to add a gas fuel injection layout on the basis of the traditional diesel engine layout to support the application of subsequent low-carbon fuels.

[0003] As Figures 1 to 2 shown, the prior art solution only includes a supply system composed of a fuel pump 6, a high-pressure fuel rail 3, a high-pressure fuel pipe 4, etc., which supports the supply of single liquid fuel and can meet the current use of existing diesel. However, the development of diesel engines has reached a bottleneck stage at present, and there are great difficulties in subsequent energy conservation, emission reduction, and thermal efficiency improvement. Single diesel fuel can no longer meet the requirements of the market and regulations. Emerging methanol, ammonia, and hydrogen energy have begun to become the mainstream of research and are also the main sources of subsequent new fuel engines.

[0004] The information disclosed in this background art section is only intended to increase the understanding of the overall background of the present utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide an overall layout structure of a new type of dual-fuel injection system, which can realize independent injection control of two fuels, can be applicable to the mixed application of liquid fuel + gas fuel, can meet the synchronous mixed combustion of various low-carbon fuels and diesel, and can improve the thermal efficiency and reduce carbon emissions by the most economical means.

[0006] To achieve the above object, the present utility model provides an overall arrangement structure of a novel dual-fuel injection system, including at least one low-carbon gas fuel rail, low-carbon gas fuel nozzles, at least one diesel high-pressure common rail, and diesel nozzles; the low-carbon gas fuel nozzles are arranged at the cylinders, and each low-carbon gas fuel nozzle is communicated with a corresponding gas outlet of at least one low-carbon gas fuel rail through a gas fuel pipeline; the diesel nozzles are arranged at the cylinders, and each diesel nozzle is communicated with a corresponding oil outlet of at least one diesel high-pressure common rail through a diesel high-pressure pipeline; wherein at least one low-carbon gas fuel rail supplies clean gas to each low-carbon gas fuel nozzle for injecting into each cylinder, and at least one diesel high-pressure common rail supplies high-pressure fuel to each fuel nozzle for injecting into each cylinder.

[0007] In a preferred embodiment, the number of at least one low-carbon gas fuel rail is two.

[0008] In a preferred embodiment, each low-carbon gas fuel rail includes a clean fuel inlet, which is communicated with a clean gas supply device.

[0009] In a preferred embodiment, the low-carbon gas fuel is first mixed with air in a mixing device and then injected into the cylinder by the low-carbon gas fuel nozzle.

[0010] In a preferred embodiment, the low-carbon gas fuel rail further includes a rail pressure sensor for real-time monitoring of the pressure inside the low-carbon gas fuel rail.

[0011] In a preferred embodiment, the rail pressure sensor is arranged on at least one low-carbon gas fuel rail.

[0012] In a preferred embodiment, the overall arrangement structure of the novel dual-fuel injection system further includes a diesel injection pump for supplying high-pressure fuel to at least one diesel high-pressure common rail.

[0013] In a preferred embodiment, the gas fuel pipeline and the diesel high-pressure pipeline are not communicated with each other.

[0014] Compared with the prior art, the overall arrangement structure of the novel dual-fuel injection system of the present utility model has the following beneficial effects: on the basis that the existing diesel engine can achieve the injection of single liquid fuel, another low-carbon gas fuel is added and injected into the intake pipe, realizing the separate injection control of the two fuels, which can be applicable to the mixed application of liquid fuel + gas fuel (such as diesel + methanol), can meet the synchronous mixed combustion of various low-carbon fuels and diesel, and improve the thermal efficiency and reduce carbon emissions by the most economical means. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural layout diagram of a fuel injection system according to an embodiment of the prior art;

[0016] Figure 2 is a schematic structural diagram of a fuel injection system according to an embodiment of the prior art;

[0017] Figures 3 to 4 is a schematic structural diagram of an air rail and a nozzle of a low-carbon fuel injection system according to an embodiment of the present invention;

[0018] Figure 5 is a schematic layout diagram of a low-carbon fuel injection system according to an embodiment of the present invention;

[0019] Figure 6 is a schematic layout diagram of a dual fuel injection system according to an embodiment of the present invention.

[0020] Description of main reference numerals:

[0021] 1 - low-carbon gas fuel nozzle, 2 - low-carbon gas fuel air rail, 201 - clean fuel inlet, 202 - rail pressure sensor, 3 - diesel high-pressure common rail, 4 - diesel high-pressure pipeline, 5 - low-carbon gas fuel air rail, 501 - clean fuel inlet, 6 - diesel injection pump, 7 - diesel nozzle. Detailed embodiments

[0022] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0023] Unless otherwise clearly stated, throughout the specification and claims, the term "comprising" or its variants such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0024] As Figures 3 to 6 shown, the overall layout structure of a novel dual fuel injection system according to a preferred embodiment of the present invention includes at least one low-carbon gas fuel air rail 2 / 5, a low-carbon gas fuel nozzle 1, at least one diesel high-pressure common rail 3, and a diesel nozzle 7; the low-carbon gas fuel nozzle 1 is arranged at the cylinder, and each low-carbon gas fuel nozzle 1 is communicated with the corresponding air outlet of at least one low-carbon gas fuel air rail 2 / 5 through a gas fuel pipeline; the diesel nozzle 7 is arranged at the cylinder, and each diesel nozzle 7 is communicated with the corresponding oil outlet of at least one diesel high-pressure common rail 3 through a diesel high-pressure pipeline 4; wherein at least one low-carbon gas fuel air rail 2 / 5 supplies clean gas to each low-carbon gas fuel nozzle 1 for injecting into each cylinder, and at least one diesel high-pressure common rail 3 supplies high-pressure fuel to each fuel nozzle for injecting into each cylinder.

[0025] In some embodiments, the number of at least one low-carbon gas fuel rail 2 / 5 is two. In fact, the number of the low-carbon gas fuel rails 2 / 5 is also determined by conditions such as the number of cylinders of the engine, the arrangement form, and the gas supply strategy.

[0026] In some embodiments, each low-carbon gas fuel rail 2 / 5 includes a clean fuel inlet 201 / 501, and the clean fuel inlet 201 / 501 is communicated with a clean gas supply device.

[0027] In some embodiments, the low-carbon gas fuel is first mixed with air in a mixing device and then injected into the cylinder by a low-carbon gas fuel nozzle 1.

[0028] In some embodiments, the low-carbon gas fuel rail 2 / 5 further includes a rail pressure sensor 202, and the rail pressure sensor 202 is used to monitor the pressure in the low-carbon gas fuel rail 2 / 5 in real time. The rail pressure sensor 202 is arranged on at least one low-carbon gas fuel rail 2 / 5, or can be arranged on each low-carbon gas fuel rail 2 / 5, which needs to be determined according to actual needs.

[0029] In some embodiments, the overall machine layout structure of the new dual-fuel injection system further includes a diesel injection pump 6, and the diesel injection pump 6 is used to supply high-pressure fuel to at least one diesel high-pressure common rail 3. The diesel injection pump 6 is generally communicated with devices such as a filter and a fuel tank.

[0030] In some embodiments, the gas fuel pipeline and the diesel high-pressure pipeline 4 are not communicated with each other. That is to say, the gas fuel supply system and the diesel supply system are two independent systems, and there is no communication between the two systems before entering the cylinder.

[0031] In some embodiments, both the gas fuel supply system and the diesel supply system can supply fuel to the engine separately under the control of the vehicle ECU and ensure the operation of the engine.

[0032] In summary, the overall machine layout structure of the new dual-fuel injection system of the present utility model has the following advantages: on the basis that the existing diesel engine can realize the injection of a single liquid fuel, another low-carbon gas fuel is added and injected into the intake pipe, and the separate injection control of the two fuels can be realized, which can be applied to the mixed application of liquid fuel + gas fuel (such as diesel + methanol), can meet the synchronous mixed combustion of various low-carbon fuels and diesel, and improve the thermal efficiency and reduce carbon emissions by the most economical means.

[0033] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations are possible in light of the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the present invention, as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A novel dual fuel injection system overall layout structure, characterized in that: include: at least one low carbon gas fuel rail; A low-carbon gas fuel nozzle is arranged at the cylinder, each of the low-carbon gas fuel nozzles is connected to a corresponding gas outlet of the at least one low-carbon gas fuel rail through a gas fuel pipeline; at least one diesel common rail; and A diesel nozzle, which is arranged at the cylinder, each of which is connected to a corresponding oil outlet of the at least one diesel high-pressure common rail through a diesel high-pressure pipeline; The at least one low-carbon gas fuel rail provides clean fuel gas to each low-carbon gas fuel nozzle for injection into each cylinder, and the at least one diesel high-pressure common rail provides high-pressure fuel to each fuel nozzle for injection into each cylinder.

2. The overall arrangement structure of the novel dual fuel injection system according to claim 1 is characterized in that: The number of the at least one low-carbon gas fuel rail is two.

3. The overall arrangement structure of the novel dual fuel injection system according to claim 1 is characterized in that: Each of the low-carbon gas fuel rails comprises a clean fuel inlet which is in communication with a clean fuel gas supply device.

4. The overall arrangement structure of the novel dual fuel injection system as claimed in claim 3 is characterized in that: The low-carbon gas fuel is first mixed with air in the mixing device and then injected into the cylinder by the low-carbon gas fuel nozzle.

5. The overall arrangement structure of the novel dual fuel injection system as claimed in claim 1 is characterized in that: The low-carbon gas fuel rail further includes a rail pressure sensor, which is used to monitor the pressure in the low-carbon gas fuel rail in real time.

6. The overall arrangement structure of the novel dual fuel injection system as claimed in claim 5 is characterized in that: The rail pressure sensor is disposed on the at least one low-carbon gas fuel rail.

7. The overall arrangement structure of the novel dual fuel injection system as claimed in claim 1 is characterized in that: Also included is a diesel injection pump for providing high-pressure fuel to the at least one diesel high-pressure common rail.

8. The overall arrangement structure of the novel dual fuel injection system as claimed in claim 1 is characterized in that: The gas fuel pipeline and the diesel high-pressure pipeline are not connected to each other.

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