CN215408944U

CN215408944U - Electric control oil injector for diesel engine

Info

Publication number: CN215408944U
Application number: CN202121819138.6U
Authority: CN
Inventors: 周文良
Original assignee: NINGBO SHUNTIAN LIANGYUAN FUEL INJECTION EQUIPMENT CO Ltd
Current assignee: NINGBO SHUNTIAN LIANGYUAN FUEL INJECTION EQUIPMENT CO Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-04
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to the technical field of electric control oil injectors, and discloses an electric control oil injector for a diesel engine, which comprises an oil injector body, wherein a needle valve is arranged in the oil injector body, an electromagnetic armature used for controlling the oil mist sprayed by the oil injector body is arranged at the upper part of the oil injector body, a valve ball is arranged at the bottom end of the electromagnetic armature, a high-pressure oil inlet and an oil outlet are respectively arranged at two sides of the oil injector body, a high-pressure chamber is arranged at the bottom of the needle valve, a control chamber used for pressure maintaining and pressure releasing is arranged at the upper part of the needle valve, the high-pressure chamber and the control chamber are both communicated with the high-pressure oil inlet, a metering hole used for communicating a chamber where the valve ball is located is arranged at the upper part of the control chamber, the chamber of the electromagnetic armature is communicated with the oil outlet, and a block dredging device is detachably arranged at the upper part of the oil injector body. The detachable blockage dredging device is communicated with the metering orifice of the oil injector body, the blockage dredging device adopts the high-pressure oil box and the oil guide rod with the oil guide pipe to communicate with the metering orifice, and high-pressure oil is used for rushing to push a blockage, so that the problem that a needle valve cannot be opened after being blocked is solved.

Description

Electric control oil injector for diesel engine

Technical Field

The utility model relates to the technical field of electric control oil injectors, in particular to an electric control oil injector for a diesel engine.

Background

The spray characteristics of the fuel injector include atomization particle size, oil mist distribution, oil beam direction, range, diffusion cone angle, and the like. These characteristics are required in diesel combustion systems to achieve complete mixture formation and combustion and to achieve high power and thermal efficiency. The ECU injects fuel in the high-pressure fuel rail into the combustion chamber with optimal fuel injection timing, fuel injection quantity and fuel injection rate by controlling the opening and closing of the electromagnetic valve.

When the electric control oil sprayer for the high-power diesel engine is used for a long time, the upper part of the control chamber is used for being communicated with the valve ball and blocking a measuring hole for pressure relief, and the blocked measuring hole can lead to the pressure balance of the control chamber and a high-pressure chamber at the bottom of the needle valve, so that the electromagnetic valve does not work, and the needle valve cannot be opened to spray oil. Therefore, an electric control fuel injector for a diesel engine is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric control oil injector for a diesel engine, wherein a detachable block dredging device is communicated and designed at a metering orifice of an oil injector body, the block dredging device adopts a high-pressure oil box and an oil guide rod with an oil guide pipe to communicate with the metering orifice, and high-pressure oil is used for rushing in to push a blocking object, so that the problem that a needle valve cannot be opened after being blocked in the background technology is solved.

The utility model provides the following technical scheme: an electric control oil injector for a diesel engine comprises an oil injector body, a needle valve is arranged in the oil injector body, an electromagnetic armature used for controlling the oil spray of the oil injector body is arranged at the upper part of the oil injector body, a valve ball is arranged at the bottom end of the electromagnetic armature, a high-pressure oil inlet and an oil outlet are respectively arranged at two sides of the oil injector body, a high-pressure chamber is arranged at the bottom of the needle valve, a control chamber used for pressure maintaining and pressure releasing is arranged at the upper part of the needle valve, the high-pressure chamber and the control chamber are both communicated with the high-pressure oil inlet, a metering hole used for communicating a chamber where the valve ball is arranged at the upper part of the control chamber, a chamber of the electromagnetic armature is communicated with the oil outlet, a block dredging device is detachably arranged at the upper part of the oil injector body, the block dredging device comprises a high-pressure oil box used for dredging the smooth pressure of the metering hole, a high-pressure oil chamber is arranged in the high-pressure oil box, an oil guide rod is detachably connected with the oil guide pipe used for communicating the high-pressure oil chamber and the metering hole, an electromagnetic valve is arranged at the port of the oil guide pipe, and an arc piston head used for reserving part of oil is arranged in the oil guide pipe.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: the high-pressure oil box is arranged to be of an annular structure, the bottom of the high-pressure oil box is correspondingly connected with an annular mounting plate, a thread section is arranged on the inner side of the annular mounting plate, a fixing plate matched with the annular mounting plate in a threaded mode is connected to the oil sprayer body, and the bottom of the annular mounting plate is in threaded connection with the fixing plate.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: one side of the oil guide pipe, which is close to the high-pressure oil box, is connected with a threaded rod, one side of the threaded rod is connected with a handle, and one side of the handle, which is close to the threaded rod, is provided with an annular inserting plate.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: two threaded mounting openings with the centers positioned on the same horizontal line are formed in one side of the high-pressure oil box, the threaded rod and the oil guide pipe are respectively in threaded connection with the corresponding threaded mounting openings, the high-pressure oil box is matched with the annular inserting plate to be provided with a slot, and one side of the annular inserting plate is inserted into the slot.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: the upper part of the oil injector body is provided with a threaded guide hole communicated with the metering hole, the threaded guide hole and the center of the threaded mounting hole are positioned on the same horizontal line, one end of the oil guide pipe is connected in the threaded guide hole in a threaded manner, and the electromagnetic valve is arranged in the threaded guide hole and positioned between the port of the oil guide pipe and the port of the threaded guide hole.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: lead and set up the logical oilhole of intercommunication high-pressure oil pocket on the body that oil pipe is located the high-pressure oil pocket, arc piston head one side is connected with the bar that the level set up, the one end that the arc piston head was kept away from to the bar is through compression spring elastic connection threaded rod, another pot head of bar is equipped with annular limit baffle, limit baffle is fixed in leads in the oil pipe, limit baffle's ring opening internal diameter is greater than the diameter of bar, limit baffle has seted up the draw-in groove near one side of arc piston head, arc piston head one side is corresponding to pegging graft in the draw-in groove.

As an alternative of the electrically controlled fuel injector for diesel engines of the present invention, wherein: an oil supplementing pipe is communicated with the high-pressure oil cavity, and a one-way valve which can only feed oil is arranged at the pipe orifice of the oil supplementing pipe.

The utility model has the following beneficial effects:

1. according to the electric control oil injector for the diesel engine, the measuring hole of an oil injector body is communicated with a detachable dredging device, the dredging device is communicated with the measuring hole through a high-pressure oil box and an oil guide rod with an oil guide pipe, high-pressure oil is used for rushing in to push a blockage, and the problem that a needle valve cannot be opened after being blocked is solved.

2. This automatically controlled sprayer for diesel engine, design in leading the oil pipe and use compression spring elastic connection's arc piston head to adopt the annular limit baffle cooperation arc piston head that has the draw-in groove, make the engine normal work, the arc piston head joint is on limit baffle under compression spring's reply pulling, seals the high-pressure oil chamber and remains partial fluid, with the work load when reducing next high-pressure oil chamber and filling fluid, convenient operation uses.

Drawings

FIG. 1 is a partial cross-sectional view of a front view structure of the present invention.

Fig. 2 is a schematic view of a partial section structure of the connection part of the dredging device.

Fig. 3 is a schematic diagram of the local structure explosion of the connection part of the dredging device.

Fig. 4 is a schematic cross-sectional structure diagram of the dredging device of the utility model.

In the figure: 1. an injector body; 2. a needle valve; 3. a high pressure oil inlet; 4. a high pressure chamber; 5. a control room; 6. measuring holes; 7. an electromagnetic armature; 8. a valve ball; 9. an oil outlet; 10. a block dredging device; 11. a high pressure oil box; 111. a threaded mounting port; 112. a slot; 12. an annular mounting plate; 13. a fixing plate; 14. a high pressure oil chamber; 15. supplementing an oil pipe; 16. an oil guide rod; 161. a handle; 162. an annular inserting plate; 163. a threaded rod; 164. an oil guide pipe; 165. an oil through hole; 166. a compression spring; 167. a bar; 168. an arcuate piston head; 169. a limit baffle; 1610. a card slot; 17. a threaded guide hole; 18. an electromagnetic valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an electrically controlled fuel injector for a diesel engine includes a fuel injector body 1, a needle valve 2 is disposed inside the fuel injector body 1, an electromagnetic armature 7 for controlling the fuel spray of the fuel injector body 1 is disposed on the upper portion of the fuel injector body 1, a valve ball 8 is disposed at the bottom end of the electromagnetic armature 7, a high-pressure oil inlet 3 and an oil outlet 9 are disposed on two sides of the fuel injector body 1, respectively, a high-pressure chamber 4 is disposed at the bottom of the needle valve 2, a control chamber 5 for pressure maintaining and pressure releasing is disposed on the upper portion of the needle valve 2, the high-pressure chamber 4 and the control chamber 5 are both communicated with the high-pressure oil inlet 3, a metering orifice 6 for communicating the chamber where the valve ball 8 is disposed on the upper portion of the control chamber 5, the chamber of the electromagnetic armature 7 is communicated with the oil outlet 9, a block removing device 10 is detachably mounted on the upper portion of the fuel injector body 1, the block removing device 10 includes a high-pressure oil box 11 for pressure removing the metering orifice 6, wherein the high-pressure oil box 11 is configured in an annular structure, the bottom of the high-pressure oil box 11 is correspondingly connected with an annular mounting plate 12, the inner side of the annular mounting plate 12 is provided with a thread section, the oil injector body 1 is connected with a fixing plate 13 matched with the annular mounting plate 12 in a thread installation mode, and the bottom of the annular mounting plate 12 is connected to the fixing plate 13 in a thread mode.

An annular fixing plate 13 is fixedly sleeved on the oil injector body 1 in a sleeving manner, an annular high-pressure oil box 11 is designed to be sleeved on the oil injector body 1, an annular mounting plate 12 at the bottom of the high-pressure oil box 11 is mounted on the fixing plate 13 in a threaded manner, and the high-pressure oil box 11 can be rapidly assembled and mounted on the oil injector body 1, so that the high-pressure oil box 11 is used for dredging when the metering orifice 6 is blocked, and abnormal work of the oil injector body 1 caused by blocking is avoided.

An oil guide rod 16 is detachably connected to one side of the high-pressure oil chamber 14, the oil guide rod 16 comprises an oil guide pipe 164 communicated with the high-pressure oil chamber 14 and the metering orifice 6, an electromagnetic valve 18 is arranged at a port of the oil guide pipe 164, a threaded rod 163 is connected to one side, close to the high-pressure oil box 11, of the oil guide pipe 164, a handle 161 is connected to one side of the threaded rod 163, and an annular inserting plate 162 is arranged on one side, close to the threaded rod 163, of the handle 161; two threaded mounting openings 111 with the centers positioned on the same horizontal line are formed in one side of the high-pressure oil box 11, the threaded rod 163 and the oil guide pipe 164 are respectively in threaded connection with the corresponding threaded mounting openings 111, the high-pressure oil box 11 is matched with the annular inserting plate 162 to be provided with the inserting groove 112, and one side of the annular inserting plate 162 is inserted into the inserting groove 112.

The upper part of the injector body 1 is provided with a threaded guide hole 17 communicated with the metering orifice 6, the threaded guide hole 17 and the center of the threaded mounting port 111 are positioned on the same horizontal line, one end of the oil guide pipe 164 is connected in the threaded guide hole 17 in a threaded manner, and the electromagnetic valve 18 is arranged in the threaded guide hole 17 and is positioned between the port of the oil guide pipe 164 and the port of the threaded guide hole 17.

When the oil ejector 10 is assembled and installed on the oil injector body 1 for the first time, after the high-pressure oil box 11 is installed, the oil guide rod 16 is used for being connected in a threaded mode and inserted into the threaded installation opening 111 on one side of the high-pressure oil box 11, so that the threaded rod 163 of the oil guide rod 16 and part of the oil guide pipe 164 are connected to the high-pressure oil box 11 in a threaded and sealed mode, and part of the oil guide pipe 164 is connected to the threaded guide hole 17 in a threaded and sealed mode until the annular insertion plate 162 at the position of the handle 161 is inserted into the insertion groove 112 in a plugged mode.

The high-pressure oil chamber 14 is arranged in the high-pressure oil box 11, the high-pressure oil chamber 14 is communicated with an oil supplementing pipe 15, a one-way valve only allowing oil to enter is arranged at the pipe orifice of the oil supplementing pipe 15, after the oil guide rod 16 is assembled, oil is conveyed and guided into the high-pressure oil chamber 14 by the oil supplementing pipe 15, the oil pressure in the high-pressure oil chamber 14 is set to be larger than that in the pressure balance of the high-pressure chamber 4, the oil in the high-pressure oil chamber 14 is ensured to flow into when communicated with the metering orifice 6, and then the oil flowing into the metering orifice 6 is used for carrying out pressure impact on the blocked position to dredge the position, so that the normal work of the oil injector body 1 is ensured.

The oil guide pipe 164 is internally provided with an arc piston head 168 for retaining part of oil, wherein an oil through hole 165 communicated with the high-pressure oil chamber 14 is formed in a pipe body of the oil guide pipe 164 positioned in the high-pressure oil chamber 14, one side of the arc piston head 168 is connected with a horizontally arranged bar 167, one end, far away from the arc piston head 168, of the bar 167 is elastically connected with a threaded rod 163 through a compression spring 166, an annular limit baffle 169 is sleeved at the other end of the bar 167, the limit baffle 169 is fixed in the oil guide pipe 164, the inner diameter of an annular hole of the limit baffle 169 is larger than the diameter of the bar 167, one side, close to the arc piston head 168, of the limit baffle 169 is provided with a clamping groove 1610, and one side of the arc piston head 168 is correspondingly inserted into the clamping groove 1610.

In the conventional working process, the electrified electromagnetic armature 7 rises and drives the valve ball 8 to move along with the electromagnetic armature 7, the control chamber 5 is communicated with a chamber where the electromagnetic armature 7 is located through the metering orifice 6 and is communicated with the oil outlet 9, so that the control chamber 5 is decompressed, the needle valve 2 rises along with the pressure difference between the high-pressure chamber 4 and the control chamber 5, and the oil in the high-pressure chamber 4 can be sprayed and exhausted after the needle valve 2 is opened;

however, when the equivalent hole 6 is blocked, after the energized electromagnetic armature 7 opens the valve ball 8, the control chamber 5 and the high-pressure chamber 4 are in a pressure balance state, the needle valve 2 cannot be opened to inject oil mist, and the engine combustion chamber which is not fed with oil works abnormally, namely the electromagnetic valve 18 is opened, so that the high-pressure oil chamber 14 is communicated with the measuring hole 6 through the oil guide pipe 164, and high-pressure oil in the high-pressure oil chamber 14 (in actual operation, the oil pressure in the high-pressure oil chamber 14 is at least half of the oil pressure value in the pressure balance state) flows to the measuring hole 6.

Firstly, high-pressure oil is led into the oil guide pipe 164 through the oil through hole 165, the flowing high-pressure oil pushes the arc piston head 168 to leave the limit baffle 169 through the annular hole of the limit baffle 169, so that the high-pressure oil continuously flows and flows into the metering orifice 6 through the electromagnetic valve 18, the high-pressure oil flowing into the metering orifice 6 pushes a blockage to be led into a chamber where the electromagnetic armature 7 with lower pressure is located, and is discharged through the oil outlet 9, the needle valve 2 is opened to spray oil mist, the engine normally works, meanwhile, the arc piston head 168 is clamped on the clamping groove 1610 of the limit baffle 169 under the pulling of the return of the compression spring 166, the high-pressure oil chamber 14 is sealed, and part of the oil is reserved, so that the workload when the high-pressure oil chamber 14 is filled with the oil next time is reduced, and the blockage problem is solved after the electromagnetic valve 18 is closed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an automatically controlled sprayer for diesel engine, includes injector body (1), the inside of injector body (1) is equipped with needle valve (2), injector body (1) upper portion is equipped with solenoid armature (7) that are used for controlling injector body (1) to spray the oil mist, the bottom of solenoid armature (7) is provided with valve ball (8), the both sides of injector body (1) are equipped with high-pressure oil inlet (3) and oil-out (9) respectively, needle valve (2) bottom is equipped with hyperbaric chamber (4), needle valve (2) upper portion is equipped with control room (5) that are used for pressurize pressure release, hyperbaric chamber (4) and control room (5) all communicate with high-pressure oil inlet (3), graduated flask (6) that are used for communicating valve ball (8) place cavity are offered on control room (5) upper portion, the cavity of solenoid armature (7) is linked together with oil-out (9), the method is characterized in that: oil sprayer body (1) upper portion demountable installation has dredge stifled ware (10), dredge stifled ware (10) including being used for pressure to dredge unobstructed high-pressure oil box (11) of graduated bore (6), the inside of high-pressure oil box (11) is provided with high-pressure oil chamber (14), one side detachable connections of high-pressure oil chamber (14) leads beam (16), lead beam (16) including leading oil pipe (164) of intercommunication high-pressure oil chamber (14) and graduated bore (6), the port department of leading oil pipe (164) is provided with solenoid valve (18), the inside of leading oil pipe (164) is equipped with and is used for keeping arc piston head (168) that partial fluid stayed.

2. An electric control fuel injector for a diesel engine according to claim 1, characterized in that: high-pressure oil box (11) set up to the loop configuration, high-pressure oil box (11) bottom correspondence is connected with annular mounting panel (12), annular mounting panel (12) inboard is provided with the screw thread section, be connected with fixed plate (13) of cooperation annular mounting panel (12) screw thread installation on injector body (1), annular mounting panel (12) bottom threaded connection is on fixed plate (13).

3. An electric control fuel injector for a diesel engine according to claim 2, characterized in that: one side that oil pipe (164) are close to high-pressure oil box (11) is connected with threaded rod (163), one side of threaded rod (163) is connected with handle (161), one side that handle (161) are close to threaded rod (163) is provided with annular picture peg (162).

4. An electric control fuel injector for a diesel engine according to claim 3, characterized in that: high-pressure oil box (11) one side is provided with two centers and is in screw thread installing port (111) on same water flat line, threaded rod (163) and oil pipe (164) be threaded connection respectively in screw thread installing port (111) that correspond, slot (112) have been seted up to high-pressure oil box (11) cooperation annular picture peg (162), peg graft in slot (112) annular picture peg (162) one side.

5. An electric control fuel injector for a diesel engine according to claim 4, characterized in that: the oil injector is characterized in that a threaded guide hole (17) communicated with the metering hole (6) is formed in the upper portion of the oil injector body (1), the threaded guide hole (17) and the center of the threaded mounting hole (111) are located on the same horizontal line, one end of the oil guide pipe (164) is connected into the threaded guide hole (17) in a threaded mode, and the electromagnetic valve (18) is installed in the threaded guide hole (17) and located between the port of the oil guide pipe (164) and the port of the threaded guide hole (17).

6. An electric control fuel injector for a diesel engine according to claim 5, characterized in that: oil pipe (164) are located the body in high-pressure oil chamber (14) and are seted up oil through hole (165) of intercommunication high-pressure oil chamber (14), rod (167) that arc piston head (168) one side was connected with the level and is set up, compression spring (166) elastic connection threaded rod (163) are passed through to the one end that arc piston head (168) were kept away from in rod (167), the other pot head of rod (167) is equipped with annular limit baffle (169), limit baffle (169) are fixed in oil pipe (164), the trepanning internal diameter of limit baffle (169) is greater than the diameter of rod (167), limit baffle (169) are close to one side of arc piston head (168) and have been seted up draw-in groove (1610), corresponding grafting in draw-in groove (1610) in arc piston head (168) one side.

7. An electric control fuel injector for a diesel engine according to claim 6, characterized in that: an oil supplementing pipe (15) is communicated with the high-pressure oil cavity (14), and a one-way valve which can only feed oil is arranged at a pipe orifice of the oil supplementing pipe (15).