Marine common rail system fuel injector assembly

Abstract

The utility model belongs to the technical field of common rail systems, particularly relates to an oil injector assembly of a marine common rail system, and aims to solve the problems that a power connector on an oil injector is fixed with an ECU (Electronic Control Unit) through a plug in a plugging manner, the risk of loosening possibly exists, an ECU command fails, and the operation of a corresponding oil injector cannot be effectively controlled, the following scheme is provided: the oil injector assembly comprises a high-pressure oil rail and a high-pressure oil pump, a plurality of oil supply ports in one side of the high-pressure oil rail are communicated with oil sprayer bodies through fourth conveying pipes, and ECU plugs are inserted into power connectors on the oil sprayer bodies. When the fuel injector is used, the oil-water separator and the fuel filter are arranged, so that water and impurities in fuel are effectively separated, the cleanliness of the fuel is improved, and the service life of the fuel injector is prolonged; due to the design of the reinforcing assembly, the connection stability between the power connector and the ECU plug is improved, the problem of ECU instruction failure caused by looseness is solved, and reliable operation of the fuel injector is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the common rail system technical field especially relates to marine common rail system oil atomizer assembly. BACKGROUND

[0002] Marine common rail system oil atomizer assembly is the key component in marine diesel engine fuel injection system, it directly influences the atomization effect of fuel, combustion efficiency and emission quality.

[0003] In the common rail system, high pressure oil pump delivers fuel to the common rail (i.e. common rail), the fuel pressure in the common rail is maintained within a certain range, when the electronic control unit (ECU) receives the injection command, it will control the electromagnetic valve on the oil atomizer to open, so that high pressure fuel is injected into the combustion chamber through the oil nozzle, the injection timing, injection quantity and injection rate are all accurately controlled by ECU to achieve the best combustion effect, at present, the power connector on the oil atomizer is fixed with ECU through the plug, there may be a risk of loosening, resulting in ECU command failure, unable to effectively control the corresponding oil atomizer operation.

[0004] In view of the above problems, the utility model file provides a marine common rail system oil atomizer assembly. INVENTION CONTENTS

[0005] The utility model provides a marine common rail system oil atomizer assembly, solves the power connector on the oil atomizer in prior art and the ECU are fixed through the plug, there may be a risk of loosening, resulting in ECU command failure, the shortcoming that corresponding oil atomizer operation cannot be effectively controlled.

[0006] The utility model provides the following technical scheme:

[0007] The utility model provides a marine common rail system oil atomizer assembly, solves the power connector on the oil atomizer in prior art and the ECU are fixed through the plug, there may be a risk of loosening, resulting in ECU command failure, the shortcoming that corresponding oil atomizer operation cannot be effectively controlled.

[0008] High pressure oil rail and high pressure oil pump, the multiple oil supply ports of one side of high pressure oil rail are all connected with oil atomizer body through fourth delivery pipe, and the power connector on the oil atomizer body is inserted with ECU plug;

[0009] Filtering assembly is arranged between high pressure oil rail and high pressure oil pump and is used for reducing oil supply impurities.

[0010] Reinforcing assembly is arranged on the power connector and ECU plug and is used for improving the connection stability.

[0011] In a possible design, the filtering assembly includes a fuel filter arranged between the high pressure oil rail and the high pressure oil pump, the input end of the fuel filter is connected with the output end of the high pressure oil pump through a second delivery pipe, and the output end of the fuel filter is connected with the input end of the high pressure oil rail through a third delivery pipe.

[0012] In a possible design, the reinforcing assembly comprises a plurality of hole blocks symmetrically arranged on both sides of the power connector and the ECU connector, a same screw bolt is arranged in the through holes of two adjacent hole blocks, and the end of the screw bolt is screwed with a hollow fixing cap for tightening.

[0013] In a possible design, the input port of the high-pressure oil pump is connected with an oil-water separator through a first conveying pipe, and the other end of the oil-water separator is connected with an oil tank.

[0014] In a possible design, the high-pressure oil rail is provided with an oil pressure sensor and a safety valve at two ends respectively.

[0015] In a possible design, the bottom of the fuel injector body is provided with a nozzle for atomization, and the inner wall of the top end of the nozzle is provided with an internal thread matched with the external thread on the outer wall of the bottom end of the fuel injector body.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the utility model.

[0017] The working principle and use process of the technical solution are as follows:

[0018] In use, fuel is extracted from the oil tank, firstly enters the oil-water separator, is connected with the input port of the high-pressure oil pump through the first conveying pipe, the water in the fuel is separated out by the oil-water separator, the fuel is preliminarily purified, the preliminarily purified fuel enters the high-pressure oil pump, the fuel is pressurized by the high-pressure oil pump, the pressurized fuel is conveyed to the fuel filter through the second conveying pipe, the fuel filter is the core part of the filtering assembly, further reduces the impurities in the fuel, guarantees the cleanliness of the fuel entering the high-pressure oil rail, the filtered fuel enters the high-pressure oil rail through the third conveying pipe, the high-pressure oil rail is a public fuel supply pipe, stores and maintains high-pressure fuel at a certain pressure, the oil pressure sensor and the safety valve are arranged at two ends of the high-pressure oil rail respectively, the oil pressure sensor monitors the fuel pressure in the high-pressure oil rail in real time, and feeds back the pressure signal to the electronic control unit (ECU), when the pressure in the high-pressure oil rail exceeds the set safety value, the safety valve is opened, and the excess pressure is released, guaranteeing the safe operation of the system.

[0019] The plurality of oil supply ports on one side of the high-pressure oil rail are connected with injector bodies through fourth delivery pipes, high-pressure fuel in the high-pressure oil rail is distributed to each injector body, a power connector on the injector body is plugged with an ECU plug, and the reinforcing assembly ensures stable connection of the two, when the ECU receives an injection instruction, it controls an electromagnetic valve on the injector body to open, a nozzle at the bottom of the injector body is connected with an inner thread on the inner wall of the top end of the nozzle and an outer thread on the outer wall of the bottom end of the injector body, after the electromagnetic valve is opened, high-pressure fuel is atomized and injected into the combustion chamber through the nozzle, and the timing, injection amount and injection rate of the injection are all accurately controlled by the ECU to achieve the best combustion effect.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] The utility model discloses a water separator and fuel filter are set up, and water and impurity in fuel oil are effectively separated, improve the cleanliness of fuel oil, prolong the service life of the injector, the connection stability between power connector and ECU plug is improved by the design of reinforcing assembly, prevent the problem of ECU instruction failure caused by loosening, and reliable operation of the injector is ensured.

[0022] The nozzle at the bottom of the injector body is designed in threaded connection, which facilitates disassembly and replacement, and reduces maintenance cost and time. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A three-dimensional structure schematic view of the marine common rail system injector assembly provided in the utility model embodiment is shown in the figure.

[0024] Figure 2 Another perspective structure schematic view of the marine common rail system injector assembly provided in the utility model embodiment is shown in the figure.

[0025] Figure 3 A partial structure schematic view of the marine common rail system injector assembly provided in the utility model embodiment is shown in the figure.

[0026] Figure 4 A reinforcing assembly structure schematic view of the marine common rail system injector assembly provided in the utility model embodiment is shown in the figure.

[0027] Mark: 1, high-pressure oil rail, 2, high-pressure oil pump, 3, injector body, 4, water separator, 5, first delivery pipe, 6, fuel filter, 7, second delivery pipe, 8, third delivery pipe, 9, oil supply port, 10, fourth delivery pipe, 11, oil pressure sensor, 12, safety valve, 13, nozzle, 14, power connector, 15, ECU plug, 16, hole block, 17, twist bolt, 18, hollow fixing cap, 19, inner thread, 20, outer thread. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0029] In the description of the utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] In order to keep the following description of the embodiments of the utility model clear and concise, the utility model omits the detailed description of known functions and known components.

[0031] Embodiment one

[0032] Please refer to Figures 1-4 , the oil sprayer assembly comprises:

[0033] The high-pressure oil rail 1 (model No. 5273955), the high-pressure oil pump 2, the oil sprayer body 3 (model No. ZCK150S435), the filter assembly, the reinforcing assembly and other auxiliary components, the high-pressure oil rail 1 is responsible for storing high-pressure fuel, and delivers the fuel to each oil sprayer body 3 through a plurality of oil supply ports 9, the high-pressure oil pump 2 is responsible for delivering the fuel to the high-pressure oil rail 1 after pressurizing, the filter assembly is used to reduce impurities in the fuel supply, to ensure the cleanliness of the fuel, and the reinforcing assembly is used to improve the connection stability between the power supply connector 14 and the ECU plug 15, to prevent loosening.

[0034] A plurality of oil supply ports 9 are arranged on one side of the high-pressure oil rail 1, each oil supply port 9 is connected to the oil sprayer body 3 through a fourth delivery pipe 10, a nozzle 13 for atomization is arranged at the bottom of the oil sprayer body 3, the nozzle 13 is tightly connected with the outer thread 20 at the bottom end of the oil sprayer body 3 through the inner thread 19, so as to replace the worn nozzle 13 for use;

[0035] Oil pressure sensors 11 and safety valves 12 are arranged at both ends of the high-pressure oil rail 1 for matched use, the oil pressure sensors 11 are used to monitor the fuel pressure in the high-pressure oil rail 1 in real time, to ensure that it operates within a safe range, and the safety valves 12 are automatically opened when the fuel pressure is too high, to release the excess pressure and protect the system from damage.

[0036] The input port of the high-pressure oil pump 2 is connected with an oil-water separator 4 through a first conveying pipe 5, which is a ZYFM (NJ) 2-5 type, and the other end of the oil-water separator 4 is connected with an oil tank, for separating water and impurities in the fuel oil and ensuring that the fuel oil entering the high-pressure oil pump 2 is clean and dry.

[0037] The reinforcing assembly is arranged on the power connector 14 and the ECU connector 15, and is used for improving the connection stability. The reinforcing assembly comprises a plurality of hole blocks 16 which are symmetrically arranged on both sides of the power connector 14 and the ECU connector 15. A same screw bolt 17 is arranged in the through holes of two adjacent hole blocks 16. The end of the screw bolt 17 penetrates the through holes of the two adjacent hole blocks 16 and is threadedly connected with a hollow fixing cap 18 which is used for tightening. By tightening the hollow fixing cap 18 and the screw bolt 17, the power connector 14 and the ECU connector 15 can be fixed firmly and prevented from loosening or falling off during use.

[0038] Embodiment Two

[0039] On the basis of Embodiment One, the marine common rail system fuel injector assembly is used in the common rail system field,

[0040] Please refer to Figures 1-2 The filtering assembly is arranged between the high-pressure oil rail 1 and the high-pressure oil pump 2, and is used for reducing the impurities in the fuel oil. The filtering assembly comprises a fuel filter 6 which is arranged between the high-pressure oil rail 1 and the high-pressure oil pump 2 and is a WK6030 type. The input end of the fuel filter 6 is connected with the output end of the high-pressure oil pump 2 through a second conveying pipe 7, and the output end is connected with the input end of the high-pressure oil rail 1 through a third conveying pipe 8. The fuel filter 6 can effectively filter the impurities in the fuel oil, and reduce the probability of wear and blockage of the fuel injector body 3 and the high-pressure oil rail 1.

[0041] However, as known by those skilled in the art, the working principles and wiring methods of the high-pressure oil pump 2, the fuel injector body 3, the oil-water separator 4 and the fuel filter 6 are common, and all belong to conventional means or common knowledge, which will not be described here again. Those skilled in the art can make any selection according to their needs or convenience.

[0042] The drawings in the specification of the present application are only schematic in nature and are not drawn to scale. The dimensions and shapes of the components shown in the drawings are not actual limits, but are only a kind of schematic representation. In the actual implementation process, the components can be reasonably configured and adjusted according to specific needs and actual situations.

[0043] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application; the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A marine common rail system injector assembly, characterized by, Include: High pressure oil rail (1) and high pressure oil pump (2), a plurality of oil supply port (9) of one side of the high pressure oil rail (1) is connected through the fourth delivery pipe (10) with the injector body (3), the power connector (14) on the injector body (3) is inserted with ECU plug (15); Filter assembly, between high pressure oil rail (1) and high pressure oil pump (2), for reducing the impurity of oil supply; Reinforced components, provided on the power connector (14) and ECU plug (15), for improving the stability of connection.

2. The marine common rail system injector assembly of claim 1, wherein, The filter assembly includes a fuel filter (6) disposed between the high pressure oil rail (1) and the high pressure oil pump (2), the input end of the fuel filter (6) is connected with the output end of the high pressure oil pump (2) through the second delivery pipe (7), and the output end of the fuel filter (6) is connected with the input end of the high pressure oil rail (1) through the third delivery pipe (8).

3. The marine common rail system injector assembly of claim 1, wherein, The reinforcing assembly includes a hole block (16) symmetrically fixed on both sides of the power connector (14) and the ECU plug (15), a same twist bolt (17) is arranged in the through hole of the adjacent two hole blocks (16), and the end of the twist bolt (17) penetrates through the through hole of the adjacent two hole blocks (16) and is threadedly connected with a hollow fixing cap (18) for tightening.

4. The marine common rail system injector assembly of claim 1, wherein, The input port of the high pressure oil pump (2) is connected with an oil-water separator (4) through the first delivery pipe (5), and the other end of the oil-water separator (4) is connected with the oil tank.

5. The marine common rail system injector assembly of claim 1, wherein, Both ends of the high pressure oil rail (1) are respectively provided with a matching oil pressure sensor (11) and a safety valve (12).

6. The marine common rail system injector assembly of claim 1, wherein, The bottom of the injector body (3) is provided with a nozzle (13) for atomization, and the inner wall of the top end of the nozzle (13) is provided with an internal thread (19) matched with the external thread (20) on the outer wall of the bottom end of the injector body (3).

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