High-pressure integrated fuel gas injection rail assembly applied to supercharged engine

Abstract

The utility model discloses a high-pressure integrated fuel gas injection rail assembly applied to a supercharged engine, and belongs to the technical field of engine fuel supply systems. The rail body is of a full-sealed structure, a gas channel is formed in the rail body, two supports are arranged at the upper end of the rail body, four gas nozzles are arranged at the lower end of the rail body side by side, each gas nozzle is communicated with the gas channel of the rail body, and a gas inlet and a gas temperature and pressure sensor are arranged on the side wall of the rail body. And the gas inlet and the fuel gas temperature and pressure sensor are respectively communicated with the rail body in a sealing manner. The high-pressure integrated fuel gas injection rail assembly has the beneficial effects of being compact in structure, easy and convenient to install, uniform in fuel gas distribution, accurate in injection control, safe and reliable in real-time monitoring, high in adaptability and the like, and a more efficient and stable fuel gas supply scheme is provided for a supercharged engine.

Description

Technical Field

[0001] This utility model belongs to the technical field of engine fuel supply system, specifically a high-pressure integrated gas injection rail assembly applied to turbocharged engines. Background Technology

[0002] Currently, most dual-fuel engines employ a split-type gas injection rail assembly structure. This structure typically connects the gas injection rail assembly to the manifold nozzles via four hoses; however, with the continuous development of engine technology and higher requirements for the utilization of engine compartment space, this split design has revealed some obvious shortcomings.

[0003] First, the split-type gas injection rail assembly occupies a large space in the engine compartment, which is undoubtedly a waste of the already limited engine compartment space. In order to meet the layout requirements of the gas rail and hoses, designers often need to make complex layouts and adjustments in the engine compartment, which increases the difficulty and complexity of the design.

[0004] Secondly, the hoses in the split design are close to the top space of the engine compartment, which poses a potential safety hazard during vehicle operation. Due to vibration and bumps during vehicle operation, the hoses may rub against the top of the engine compartment or other components, causing wear or even damage. Once the hoses are damaged, natural gas may leak, leading to a safety accident. Utility Model Content

[0005] To address the problems existing in the background technology, this utility model provides a high-pressure integrated gas injection rail assembly for use in turbocharged engines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure integrated gas injection rail assembly applied to a turbocharged engine, comprising a rail body, an air inlet, a gas temperature and pressure sensor, two brackets, and four jet nozzles;

[0007] The rail body is a fully sealed structure with an internal gas passage. Two supports are provided at the upper end of the rail body, and four jet nozzles are arranged side by side at the lower end of the rail body. Each jet nozzle is connected to the gas passage of the rail body. An air inlet and a gas temperature and pressure sensor are provided on the side wall of the rail body. The air inlet and the gas temperature and pressure sensor are respectively sealed and connected to the internal gas passage of the rail body.

[0008] Each of the jet nozzles is sealed to the rail body via a corresponding clip, and each jet nozzle has a matching nozzle hole inside.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. Compact structure and high space utilization: This jet rail assembly adopts a fully sealed rail body design and integrates two brackets and four jet nozzles. It is directly fixed to the engine intake manifold through the brackets. Compared with the split structure, it greatly saves engine compartment space and improves space utilization.

[0011] 2. Easy installation and maintenance: The air inlet and gas temperature and pressure sensor on the rail body are sealed and connected to the rail body, and the jet nozzle is sealed and connected to the rail body through a clip. This design makes the installation process simpler and also facilitates subsequent maintenance and replacement.

[0012] 3. Uniform gas distribution and precise injection control: The rail body is equipped with a gas channel. Low-pressure gas enters the rail body through the air inlet and is evenly distributed in the gas channel to provide a stable gas supply for the four jet nozzles. The ECU dynamically adjusts the injection pulse width according to parameters such as engine speed and load, realizing precise control of the gas injection quantity.

[0013] 4. Real-time monitoring, safe and reliable: The gas temperature and pressure sensor monitors the pressure and temperature of the gas inside the rail body in real time, providing feedback signals to the ECU. This allows the ECU to adjust the injection pulse width based on the real-time data, ensuring that the gas injection quantity and effect meet the actual needs of the engine. At the same time, this real-time monitoring also improves the safety of the system, avoiding safety accidents caused by excessive gas pressure or temperature.

[0014] 5. High adaptability and wide application: This fuel rail assembly, through the dynamic control strategy of the ECU, can adapt to the fuel demand under different operating conditions, such as starting, acceleration, and idling, ensuring that the engine always receives a suitable fuel supply. Therefore, this fuel rail assembly has strong adaptability and can be widely used in various turbocharged engines.

[0015] In summary, this high-pressure integrated gas injection rail assembly offers advantages such as compact structure, easy installation, uniform gas distribution, precise injection control, reliable real-time monitoring, and strong adaptability, providing a more efficient and stable gas supply solution for turbocharged engines. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a schematic diagram of the usage state of this utility model. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0019] This embodiment describes a high-pressure integrated gas injection rail assembly applied to a turbocharged engine, including a rail body 1, an air inlet 3, a gas temperature and pressure sensor 4, two brackets 2 and four jet nozzles 5.

[0020] The rail body 1 is a fully sealed structure with a gas passage inside. Two supports 2 are provided at the upper end of the rail body 1, and four jet nozzles 5 are arranged side by side at the lower end of the rail body 1. Each jet nozzle 5 is connected to the gas passage of the rail body 1. An air inlet 3 and a gas temperature and pressure sensor 4 are provided on the side wall of the rail body 1. The air inlet 3 and the gas temperature and pressure sensor 4 are respectively sealed and connected to the gas passage inside the rail body 1.

[0021] Each of the jet nozzles 5 is sealed to the rail body 1 by a corresponding clip 6. Each jet nozzle 5 is provided with a matching nozzle hole, and different flow rates can be achieved by using different nozzle hole diameters.

[0022] When using this utility model, the two brackets 2 are fixed to the engine air intake manifold with bolts, and the rail body 1 is kept parallel to the engine cylinder head; according to the air passage layout of the engine air intake manifold, the installation positions of the air inlet 3 and the gas temperature and pressure sensor 4 are determined in advance on the outer wall of the rail body 1, and the corresponding connection holes are machined. Then, the gas temperature and pressure sensor 4 and the air inlet 3 are respectively sealed and connected to the corresponding connection holes; each jet nozzle 5 is inserted into the corresponding air intake passage mounting hole of the air intake manifold and locked with a clip 6 to prevent the jet nozzle 5 from detaching from the rail body 1. The gas output from the high-pressure CNG cylinder is reduced to 7-8 bar by a pressure reducing valve to form low-pressure gas. This low-pressure gas is then connected to the air inlet 3 on the side wall of rail body 1 through a hose on the low-pressure gas filter to establish a gas input path. The injection pulse width of the jet nozzle 5 is configured by the ECU control strategy. The ECU dynamically adjusts the injection pulse width according to the engine speed and load parameters, so that the low-pressure gas is distributed to each jet nozzle 5 through rail body 1 to form a mixture in the intake manifold of each cylinder. The gas pressure and temperature inside rail body 1 are monitored in real time by the gas temperature and pressure sensor 4 to complete the matching of engine operating parameters.

[0023] The high-pressure gas output from the high-pressure CNG cylinder first enters the pressure reducing valve, which lowers the pressure of the high-pressure gas to 7-8 bar, forming low-pressure gas suitable for the operation of the injection rail. The low-pressure gas then passes through a low-pressure gas filter, which removes impurities from the gas, ensuring that the gas entering the injection rail is clean and preventing impurities from damaging the injection rail and engine. The filtered low-pressure gas is then transported through a hose to the air inlet 3 on the side wall of the rail body 1, entering the gas passage inside the rail body 1. The rail body 1, as a fully sealed structure, serves to store and distribute the gas. The low-pressure gas entering the gas passage is evenly distributed within it, providing a stable gas supply to the four injection nozzles 5.

[0024] The ECU (Electronic Control Unit, existing technology) collects engine speed, load and other parameters in real time, and formulates control strategies based on these parameters, dynamically configuring the injection pulse width of the jet nozzle 5. When the engine is under different operating conditions, such as starting, accelerating, idling, etc., the ECU calculates the opening time and frequency of each jet nozzle 5 according to the pre-set program and the real-time monitored engine status. For example, when the engine is accelerating, more gas is needed to provide power, so the ECU increases the injection pulse width, making the jet nozzle 5 open for a longer time, thereby injecting more gas.

[0025] Each jet nozzle 5 is sealed to the rail body 1 via a corresponding clip 6 and has a matching nozzle orifice inside. When the ECU issues an injection command, the jet nozzle 5 opens according to the set injection pulse width. The low-pressure gas in the rail body 1 is injected into the intake manifold through the nozzle orifice of the jet nozzle 5 at a certain pressure and injection angle. The injected gas mixes with the air entering the intake manifold to form a combustible mixture. This mixture then enters the engine cylinder and is ignited at the appropriate time, pushing the piston to move and thus providing power to the engine.

[0026] A gas temperature and pressure sensor 4 is installed on the rail body 1, which monitors the pressure and temperature of the gas within the rail body 1 in real time. The sensor feeds back the monitored pressure and temperature signals to the ECU, which then adjusts and corrects the injection pulse width of the jet nozzle 5 based on this feedback. For example, if the gas pressure within the rail body 1 is too high or too low, the ECU will adjust the injection pulse width accordingly to ensure that the gas injection quantity and effect meet the actual needs of the engine. Simultaneously, temperature information also helps the ECU to more precisely control the engine's combustion process, improving engine performance and fuel economy.

[0027] In summary, this high-pressure integrated gas injection rail assembly achieves precise control of the gas injection of the turbocharged engine through a series of processes including gas supply, injection control, and monitoring feedback, ensuring that the engine can operate stably and efficiently under different operating conditions.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-pressure integrated gas injection rail assembly applied to a turbocharged engine, characterized in that: It includes the rail body (1), air inlet (3), gas temperature and pressure sensor (4), two brackets (2) and four jet nozzles (5); The rail body (1) is a fully sealed structure with a gas passage inside. The upper end of the rail body (1) is provided with two supports (2), and the lower end of the rail body (1) is provided with four jet nozzles (5) in parallel. Each jet nozzle (5) is connected to the gas passage of the rail body (1). The side wall of the rail body (1) is provided with an air inlet (3) and a gas temperature and pressure sensor (4). The air inlet (3) and the gas temperature and pressure sensor (4) are respectively sealed and connected to the gas passage inside the rail body (1).

2. The high-pressure integrated gas injection rail assembly for turbocharged engines according to claim 1, characterized in that: Each of the jet nozzles (5) is sealed to the rail body (1) by a corresponding clip (6), and each jet nozzle (5) is provided with a matching nozzle hole.

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