阅读说明：本技术 一种适用于四气门柴油机的电控喷油器总成 (Electric control oil injector assembly suitable for four-valve diesel engine ) 是由 韩大志 姚虎 缪凯 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种适用于四气门柴油机的电控喷油器总成,包括气缸盖,所述气缸盖上开设有竖向的喷油器安装孔和斜向与喷油器安装孔连通的高压连接杆安装孔,喷油器安装孔内安装有电控喷油器,高压连接杆安装孔内安装有高压连接杆。该适用于四气门柴油机的电控喷油器总成,利用独立的高压连接杆将高压油管与电控喷油器连接,从而减短高压油管长度,使得管内压力波动较小,同时将高压连接杆安装在气缸盖内部,结构可靠,不占有空间,不影响其他零部件的布置,使得整机高压油管结构布置更加紧凑,解决了原有四气门柴油机电控喷油器结构使得高压油管布置较长,管内压力波动较大,结构不紧凑的问题,可在同类产品中推广使用。(The invention discloses an electric control oil injector assembly suitable for a four-valve diesel engine, which comprises an air cylinder cover, wherein a vertical oil injector mounting hole and a high-pressure connecting rod mounting hole communicated with the oil injector mounting hole in an inclined mode are formed in the air cylinder cover, an electric control oil injector is mounted in the oil injector mounting hole, and a high-pressure connecting rod is mounted in the high-pressure connecting rod mounting hole. This automatically controlled sprayer assembly suitable for four-valve diesel engine utilizes independent high-pressure connecting rod to be connected high pressure fuel pipe and automatically controlled sprayer, thereby reduce high pressure fuel pipe length, make intraductal pressure oscillation less, install the high pressure connecting rod inside the cylinder head simultaneously, the structure is reliable, do not occupy the space, do not influence the arrangement of other spare parts, make complete machine high pressure fuel pipe structural arrangement compacter, solved original four-valve diesel engine automatically controlled sprayer structure and made high pressure fuel pipe arrange longer, intraductal pressure oscillation is great, the problem of structure compactedness, can use widely in like product.)

1. The utility model provides an automatically controlled sprayer assembly suitable for four-valve diesel engine, includes cylinder head (17), its characterized in that: the oil sprayer is characterized in that a vertical oil sprayer mounting hole (20) and a high-pressure connecting rod mounting hole (18) communicated with the oil sprayer mounting hole (20) in an inclined mode are formed in the cylinder cover (17), an electric control oil sprayer (1) is mounted in the oil sprayer mounting hole (20), a high-pressure connecting rod (4) is mounted in the high-pressure connecting rod mounting hole (18), the high-pressure connecting rod (4) is of a hollow tubular structure provided with an oil duct (13), and one end of the high-pressure connecting rod (4) is conical and is connected with a conical surface oil inlet (9) formed in the side face of the electric control oil.

2. An electrically controlled fuel injector assembly according to claim 1 for use in a four valve diesel engine, wherein: the bottom of the electric control oil sprayer (1) is an oil injection hole (11), the top end of the electric control oil sprayer (1) is provided with two binding posts (6), an O-shaped groove in the middle of the electric control oil sprayer (1) is sleeved with a first O-shaped sealing ring (8), and the first O-shaped sealing ring (8) is located below a circular ring-shaped step on the outer surface of the electric control oil sprayer (1).

3. An electrically controlled fuel injector assembly according to claim 2 adapted for use in a four valve diesel engine, wherein: and the cylinder cover (17) is also provided with an oil return hole (19) inside the cylinder cover, which is communicated with the joint of the oil sprayer mounting hole (20) and the high-pressure connecting rod mounting hole (18), the side surface of the electric control oil sprayer (1) is provided with an oil sprayer oil return hole (10) communicated with the inner cavity of the electric control oil sprayer, and the oil sprayer oil return hole (10) is positioned below the first O-shaped sealing ring (8).

4. An electrically controlled fuel injector assembly according to claim 3 adapted for use in a four valve diesel engine, wherein: the fuel injector is characterized in that a fuel injector pressing plate (2) is arranged at the top of the cylinder cover (17), a jack (16) for a power control fuel injector (1) to pass through is formed in the middle of the fuel injector pressing plate (2), the bottom surface of the fuel injector pressing plate (2) is in press fit with a circular ring-shaped step on the outer surface of the power control fuel injector (1), bolt holes (15) are formed in two ends of the fuel injector pressing plate (2), and bolts (3) in the bolt holes (15) are connected with the cylinder cover (17.

5. An electrically controlled fuel injector assembly according to claim 4 adapted for use in a four valve diesel engine, wherein: the upper surface of the oil sprayer pressing plate (2) is provided with a positioning groove (14) communicated with the insertion hole (16), and a positioning pin (7) arranged on the side surface of the electric control oil sprayer (1) is located in the positioning groove (14).

6. An electrically controlled fuel injector assembly according to claim 1 for use in a four valve diesel engine, wherein: be equipped with the annular on high pressure connecting rod (4), the annular endotheca is equipped with second O type sealing washer (12), and the shaping has annular boss still on high pressure connecting rod (4), and second O type sealing washer (12) are located between annular boss and automatically controlled sprayer (1).

7. An electrically controlled fuel injector assembly according to claim 6 adapted for use in a four valve diesel engine, wherein: one end, far away from the electric control fuel injector (1), of the high-pressure connecting rod (4) is sleeved with a pressing threaded sleeve (5) pressed on the boss, and external threads on the outer surface of the pressing threaded sleeve (5) are in threaded connection with the high-pressure connecting rod mounting hole (18).

8. An electrically controlled fuel injector assembly according to claim 7 adapted for use in a four valve diesel engine, wherein: and one end of the high-pressure connecting rod (4) far away from the electric control fuel injector (1) is an external thread interface.

9. An electrically controlled fuel injector assembly according to claim 8 adapted for use in a four valve diesel engine, wherein: and a filter element is arranged in the oil duct (13).

10. An electrically controlled fuel injector assembly according to claim 9 for use in a four valve diesel engine, wherein: and the outer surface of the high-pressure connecting rod (4) is provided with a positioning key matched with the positioning side groove on the inner wall of the high-pressure connecting rod mounting hole (18).

Technical Field

The invention relates to the field of electric control diesel engines, in particular to an electric control oil injector assembly suitable for a four-valve diesel engine.

Background

In the prior art, an electrically controlled fuel injector is one of essential parts in an electrically controlled diesel engine. Under the traditional condition, the electric control oil injector of the four-valve diesel engine has a complex structure and needs to be vertically arranged in the center of a combustion chamber, so that the high-pressure oil pipe is arranged longer by the original electric control oil injector with a threaded oil inlet interface (namely directly connected with the high-pressure oil pipe). The pressure fluctuation in the high-pressure oil pipe is large, the fuel injection pressure is affected, the combustion and tail gas emission results are affected, and meanwhile the problem that the structure is not compact enough exists.

Disclosure of Invention

Solves the technical problem

Aiming at the defects of the prior art, the invention provides the electric control fuel injector assembly suitable for the four-valve diesel engine, the high-pressure fuel pipe is connected with the fuel injector by utilizing the independent high-pressure connecting rod, so that the length of the high-pressure fuel pipe is shortened, the pressure fluctuation in the pipe is smaller, meanwhile, the high-pressure connecting rod is structurally arranged in the cylinder cover, the structure is reliable, the space is not occupied, the arrangement of other parts is not influenced, the structural arrangement of the high-pressure fuel pipe of the whole engine is more compact, and the problems that the high-pressure fuel pipe is longer in arrangement, the pressure fluctuation in the pipe is larger and the structure is not.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an automatically controlled sprayer assembly suitable for four valve diesel engine, includes the cylinder head, set up vertical sprayer mounting hole and the slant high-pressure connecting rod mounting hole with sprayer mounting hole intercommunication on the cylinder head, install automatically controlled sprayer in the sprayer mounting hole, install the high-pressure connecting rod in the high-pressure connecting rod mounting hole, the high-pressure connecting rod is the tubular structure that cavity was equipped with the oil duct, and the one end of high-pressure connecting rod is conical and pegs graft with the conical surface oil inlet that automatically controlled sprayer side was seted up.

Further limiting, the bottom end of the electric control oil injector is an oil injection hole, the top end of the electric control oil injector is provided with two binding posts, a first O-shaped sealing ring is sleeved in an O-shaped groove in the middle of the electric control oil injector, and the first O-shaped sealing ring is located below a circular ring-shaped step on the outer surface of the electric control oil injector.

Further inject, still set up the inside oil gallery of cylinder cap with sprayer mounting hole and high-pressure connecting rod mounting hole handing-over department intercommunication on the cylinder cap, the sprayer oil gallery rather than the inner chamber intercommunication is seted up to the side of automatically controlled sprayer, and this sprayer oil gallery is located the below of first O type sealing washer.

Further limiting, an oil sprayer pressing plate is arranged at the top of the cylinder cover, a jack through which the electric control oil sprayer passes is formed in the middle of the oil sprayer pressing plate, the bottom surface of the oil sprayer pressing plate is in press fit with the annular steps on the outer surface of the electric control oil sprayer, bolt holes are formed in the two ends of the oil sprayer pressing plate, and bolts in the bolt holes are connected with the cylinder cover.

Further limiting, a positioning groove communicated with the insertion hole is formed in the upper surface of the oil sprayer pressing plate, and a positioning pin arranged on the side surface of the electric control oil sprayer is located in the positioning groove.

Further inject, be equipped with the annular on the high pressure connecting rod, the annular endotheca is equipped with second O type sealing washer, and the last still shaping of high pressure connecting rod has annular boss, and second O type sealing washer is located between annular boss and the automatically controlled sprayer.

And further limiting, wherein one end of the high-pressure connecting rod, which is far away from the electric control oil injector, is sleeved with a pressing threaded sleeve pressed on the boss, and external threads on the outer surface of the pressing threaded sleeve are in threaded connection with the mounting hole of the high-pressure connecting rod.

Further limiting, one end, far away from the electric control oil injector, of the high-pressure connecting rod is an external thread interface.

Further limit, be provided with the filter core in the oil duct.

Further inject, the surface of high pressure connecting rod is provided with the positioning key with high pressure connecting rod mounting hole inner wall location limit groove assorted.

This automatically controlled sprayer assembly suitable for four-valve diesel engine utilizes independent high-pressure connecting rod to be connected high pressure fuel pipe and automatically controlled sprayer, thereby reduce high pressure fuel pipe length, make intraductal pressure oscillation less, install the high pressure connecting rod inside the cylinder head simultaneously, the structure is reliable, do not occupy the space, do not influence the arrangement of other spare parts, make complete machine high pressure fuel pipe structural arrangement compacter, solved original four-valve diesel engine automatically controlled sprayer structure and made high pressure fuel pipe arrange longer, intraductal pressure oscillation is great, the problem of structure compactedness, can use widely in like product.

Drawings

FIG. 1 is a fitting installation diagram of an electric control fuel injector and a high-pressure connecting rod according to the present invention;

FIG. 2 is a schematic structural diagram of an electrically controlled fuel injector according to the present invention;

FIG. 3 is a schematic view of the structure of the high-pressure connecting rod of the present invention;

FIG. 4 is a schematic diagram of a fuel injector pressure plate configuration of the present invention;

fig. 5 is a schematic structural view of the cylinder head of the present invention.

In the figure: 1. an electrically controlled fuel injector; 2. a fuel injector pressure plate; 3. a bolt; 4. a high pressure connecting rod; 5. pressing the threaded sleeve; 6. a binding post; 7. positioning pins; 8. a first O-ring seal; 9. a conical surface oil inlet; 10. an oil return hole of the oil injector; 11. an oil spray hole; 12. a second O-ring seal; 13. an oil passage; 14. positioning a groove; 15. bolt holes; 16. a jack; 17. a cylinder head; 18. a high-pressure connecting rod mounting hole; 19. an oil return hole in the cylinder cover; 20 injector mounting holes.

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. 1-5, the present invention provides a technical solution: the utility model provides an automatically controlled sprayer assembly suitable for four valve diesel engine, including cylinder head 17, set up vertical sprayer mounting hole 20 and the slant high-pressure connecting rod mounting hole 18 with sprayer mounting hole 20 intercommunication on the cylinder head 17, install automatically controlled sprayer 1 in the sprayer mounting hole 20, install high-pressure connecting rod 4 in the high-pressure connecting rod mounting hole 18, high-pressure connecting rod 4 is the hollow tubular structure that is equipped with oil duct 13, be provided with the filter core in the oil duct 13, the one end of high-pressure connecting rod 4 is conical and pegs graft with conical surface oil inlet 9 that 1 side of automatically controlled sprayer was seted up, two conical surfaces are under the extrusion promotion that compresses tightly swivel nut 5, the cooperation is inseparabler, it is sealed more.

The bottom end of the electric control oil injector 1 is an oil injection hole 11, the top end of the electric control oil injector 1 is provided with two binding posts 6, an O-shaped groove used for the middle part of the electric control oil injector 1 is internally sleeved with a first O-shaped sealing ring 8, the first O-shaped sealing ring 8 is positioned below a circular step on the outer surface of the electric control oil injector 1, and the first O-shaped sealing ring 8 is used for sealing between the electric control oil injector 1 and an oil injector mounting hole 20.

The cylinder cover 17 is further provided with an oil return hole 19 inside the cylinder cover communicated with the joint of the oil injector mounting hole 20 and the high-pressure connecting rod mounting hole 18, the side surface of the electric control oil injector 1 is provided with an oil injector oil return hole 10 communicated with the inner cavity of the electric control oil injector, the oil injector oil return hole 10 is positioned below the first O-shaped sealing ring 8, high-pressure oil enters the electric control oil injector 1 from a high-pressure oil pipe through an oil duct 13 of the high-pressure connecting rod 4 to work, and redundant oil flows back to the oil return hole 19 inside the cylinder cover from the oil injector oil return hole 10 and flows out of the cylinder.

The top of the cylinder cover 17 is provided with an oil sprayer pressing plate 2, the middle of the oil sprayer pressing plate 2 is provided with a jack 16 through which the electric control oil sprayer 1 passes, the bottom surface of the oil sprayer pressing plate 2 is in press fit with the circular steps on the outer surface of the electric control oil sprayer 1, the two ends of the oil sprayer pressing plate 2 are provided with bolt holes 15, bolts 3 in the bolt holes 15 are connected with the cylinder cover 17, the oil sprayer pressing plate 2 is used for installing, pressing and fixing the electric control oil sprayer 1, and meanwhile, pressure can be applied to the first O-shaped sealing ring.

The upper surface of the oil sprayer pressing plate 2 is provided with a positioning groove 14 communicated with the insertion hole 16, the positioning pin 7 arranged on the side surface of the electric control oil sprayer 1 is positioned in the positioning groove 14, and the positioning groove 14 is matched with the positioning pin 7 to be used for radially positioning the electric control oil sprayer 1.

An annular groove is formed in the high-pressure connecting rod 4, a second O-shaped sealing ring 12 is sleeved in the annular groove, an annular boss is further formed on the high-pressure connecting rod 4, the second O-shaped sealing ring 12 is located between the annular boss and the electric control fuel injector 1, and the second O-shaped sealing ring 12 is used for sealing between the boss and the high-pressure connecting rod mounting hole 18.

One end of the high-pressure connecting rod 4, which is far away from the electric control fuel injector 1, is sleeved with a pressing threaded sleeve 5 pressed on a boss, external threads on the outer surface of the pressing threaded sleeve 5 are in threaded connection with the high-pressure connecting rod mounting hole 18, the pressing threaded sleeve 5 is screwed to enable the pressing threaded sleeve 5 to be in threaded fit with the high-pressure connecting rod mounting hole 18, the high-pressure connecting rod 4 can be in close butt joint with the conical surface fuel inlet 9, and meanwhile, the high-pressure connecting rod 48 is sealed with the high-pressure connecting rod mounting hole 12 through a second.

And one end of the high-pressure connecting rod 4, which is far away from the electric control fuel injector 1, is an external thread interface so as to be conveniently connected with a high-pressure fuel pipe.

The outer surface of the high-pressure connecting rod 4 is provided with a positioning key matched with the positioning side groove on the inner wall of the high-pressure connecting rod mounting hole 18, and the positioning key is used for radially positioning the high-pressure connecting rod 4 and preventing rotation.

This automatically controlled sprayer assembly suitable for four-valve diesel engine utilizes independent high-pressure connecting rod 4 to be connected high pressure fuel pipe and automatically controlled sprayer 1, thereby reduce the high pressure fuel pipe length, make intraductal pressure oscillation less, install high pressure connecting rod 4 inside cylinder head 17 simultaneously, the structure is reliable, do not occupy the space, do not influence the arrangement of other spare parts, make complete machine high pressure fuel pipe structural arrangement compacter, it makes high pressure fuel pipe arrange longer to have solved original four-valve diesel engine automatically controlled sprayer structure, intraductal pressure oscillation is great, the problem of structure uncompacted, can use widely in like product.

It should be noted that, in this document, 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.