CN202520449U

CN202520449U - Oil sprayer capable of adjusting travel of control valve

Info

Publication number: CN202520449U
Application number: CN2012200764863U
Authority: CN
Inventors: 周明; 乌江; 牟学利; 张卫军; 兰旭东; 张秉鉴; 黄旭东; 黄金鹏; 其他发明人请求不公开姓名
Original assignee: SHANDONG XINYA INDUSTRY Co Ltd; Tsinghua University
Current assignee: SHANDONG XINYA INDUSTRY Co Ltd; Tsinghua University
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2012-11-07
Anticipated expiration: 2022-03-02

Abstract

The utility model discloses an oil sprayer capable of adjusting travel of a control valve, which belongs to the technical field of automobile parts. Compared with the oil sprayer in the prior art, the oil sprayer capable of adjusting travel of the control valve is as follows: a travel adjusting block for adjusting the travel of the control valve is arranged between a control valve matching part and a needle valve matching part, which are controlled by an electromagnetic valve, in an oil sprayer body. The opening travel of a needle valve is determined by an effective length of the travel adjusting block, so that the opening degree of the needle valve is controlled so as to control oil spraying quantity. Through adjusting the length of the travel adjusting block, the oil sprayer disclosed by the utility model can be suitable for requirements of different machine models. The structure of the electric control oil sprayer disclosed by the utility model adapts to conditions of the current domestic manufacturing technique and is suitable for electric control fuel spraying systems of automobile engines; and oil spraying rules of the electric control oil sprayer are controllable.

Description

The oil sprayer of can regulate control valve stroke

Technical field

The utility model belongs to technical field of automobile parts, particularly a kind of oil sprayer of can regulate control valve stroke.

Background technique

Diesel engine is the highest motor of the thermal efficiency always, and the recoverable amount and the output of diesel engine rise year by year, and thing followed diesel emission problem also causes people's attention day by day.Along with China's automobile industry is paid attention to the control automotive exhaust gas and improved fuel economy; Europe III Abgasgesetz and fuel economy commencement of statute; Domestic passenger car industry shortage satisfies the high-power diesel engine of new generation of the good specific mass volume of Europe III and stricter Abgasgesetz and fuel economy; Reach Europe III Abgasgesetz, must adopt the Electrocontrolled high-pressure common rail fuel injection system, wherein important one is exactly electric-controlled fuel injector.

The existing oil sprayer of China is difficult to accomplish the control of injection timing, pressure and the fuel injection characteristic of oil sprayer because domestic manufacturing technology level limits, and it is insensitive noticeable degree to occur, the phenomenons such as back needle-valve shake of taking a seat.In order to overcome above-mentioned deficiency, need a kind of electric-controlled fuel injector structure that adapts to the condition of domestic current production technology of design, realize that the fuel injection characteristic of electric-controlled fuel injector is controlled.

The model utility content

The purpose of the utility model is to solve a kind of electric-controlled fuel injector structure that adapts to the condition of domestic current production technology of the said design of background technique; Realize the controlled problem of fuel injection characteristic of electric-controlled fuel injector; A kind of oil sprayer of can regulate control valve stroke is provided; It is characterized in that; Oil injector body l locatees coaxial connections with needle-valve body 5 through 2 locating studs on end face 9, and tight cap 7 is enclosed within on the needle-valve body 5 and is threaded the cavity of oil injector body l, needle-valve body 5 and tight cap 7 composition oil sprayers with oil injector body l, and stroke adjustment piece 4 places between control piston 2 and the needle-valve 6; The core body of stroke adjustment piece 4 and control piston 2 and needle-valve 6 coaxial composition oil sprayers, the core body of oil sprayer is coaxial to be placed in the cavity of oil sprayer;

Said stroke adjustment piece 4 is made up of coaxial small cylinder 401 and large cylinder 402; The small cylinder end face 403 of stroke adjustment piece 4 is the plane; The large cylinder end face of stroke adjustment piece 4 is circular groove 405, and the small cylinder of stroke adjustment piece 4 and the junction surface of large cylinder are shoulder face 404;

Control piston 2 coaxial placing in the oil injector body l, the small cylinder 401 of stroke adjustment piece 4 is in oil injector body l, and small cylinder end face 403 contacts with control piston 2; Return spring 3 is enclosed within oil injector body l on the small cylinder 401 of control piston 2 and stroke adjustment piece 4, and an end of return spring 3 compresses with oil injector body l through packing ring 8, and the other end of return spring 3 contacts with the shoulder face 404 of stroke adjustment piece 4; Needle-valve 6 is in needle-valve body 5; The planar ends of needle-valve 6 contacts with stroke adjustment piece 4 in groove 405, and needle-valve 6 conical needle tips are in the needle-valve chamber 11 of needle-valve body 5, and the inwall in needle-valve chamber 11 is a conical surface; 6～8 nozzle openings 10 are arranged with needle-valve chamber 11 and needle-valve body 5 external communications on the wall in needle-valve chamber 11; Under the normality, under the effect of control piston 2 thrusts and return spring 3 restoring forces, needle-valve 6 is with nozzle opening 10 sealings;

Said needle-valve 6 is a Spielpassung with needle-valve body 5;

The characteristics of the utility model are; The utility model is compared with the existing technology oil sprayer; Between by the control valve coupling of electromagnetic valve and pintle nozzle match-ing parts, a stroke adjustment piece 4 is set, the adjusting control valve stroke, the effective length of stroke adjustment piece has determined the stroke that needle-valve is opened; Thereby the opening degree of control needle-valve is realized the control to fuel injection quantity; Stroke adjustment piece 4 offers the power that needle-valve 6 is taken a seat by return spring 3 simultaneously, guarantees that the closed condition of needle-valve 6 sets back with spraying to accomplish; Stroke adjustment piece 4 has reduced the length of needle-valve 6, has reduced the requirement of processing technology, can process under the existing at home manufacturing technology level and can produce high-precision needle-valve and stroke adjustment piece, has realized that the fuel injection characteristic of electric-controlled fuel injector is controlled; As long as the length of adjustment stroke adjustment piece 4, oil sprayer are just applicable to the requirement of different type of machines.

The beneficial effect of the utility model is that the electric-controlled fuel injector structure of the utility model adapts to the condition of domestic current production technology, realizes that the fuel injection characteristic of electric-controlled fuel injector is controlled, is applicable to the internal-combustion engine electronic control fuel injection system.

Description of drawings

Fig. 1 is the fuel injector structure schematic representation of can regulate control valve stroke;

Figure 1A is an A place enlarged diagram among Fig. 1;

Fig. 2 is a stroke adjustment piece plan view.

Among the figure, 1--oil injector body, 2--control piston, 3--return spring, 4--stroke adjustment piece; The 401--small column, the 402--large cylinder, 403--small cylinder end face, 404-takes on face; The 405--groove, 5--needle-valve body, 6--needle-valve 6, the tight cap of 7--; The 8--packing ring, 9--locating stud, 10--nozzle opening, 11--needle-valve chamber 11.

Embodiment

Below in conjunction with embodiment and accompanying drawing the utility model is further described.

Fig. 1 is the oil sprayer embodiment's of can regulate control valve stroke a structural representation; Oil injector body l locatees coaxial connections with needle-valve body 5 through 3 locating studs on end face 9, and tight cap 7 is enclosed within on the needle-valve body 5 and is threaded the cavity of oil injector body l, needle-valve body 5 and tight cap 7 composition oil sprayers with oil injector body l.Stroke adjustment piece 4 places between control piston 2 and the needle-valve 6, the core body of stroke adjustment piece 4 and control piston 2 and needle-valve 6 coaxial composition oil sprayers.The core body of oil sprayer is coaxial to be placed in the cavity of oil sprayer.

As shown in Figure 2; Stroke adjustment piece 4 is made up of coaxial small cylinder 401 and large cylinder 402; The small cylinder end face 403 of stroke adjustment piece 4 is the plane; The large cylinder end face of stroke adjustment piece 4 is circular groove 405, and the small cylinder of stroke adjustment piece 4 and the junction surface of large cylinder are shoulder face 404.

Control piston 2 coaxial placing in the oil injector body l, stroke adjustment piece 4 small cylinders are in oil injector body l, and small cylinder end face 403 contacts with control piston 2.Return spring 3 is enclosed within oil injector body l on the small cylinder 401 of control piston 2 and stroke adjustment piece 4, and an end of return spring 3 compresses with oil injector body l through packing ring 8, and the other end of return spring 3 contacts with the shoulder face 404 of stroke adjustment piece 4.Needle-valve 6 is in needle-valve body 5, and the planar ends of needle-valve 6 contacts with stroke adjustment piece 4 in groove 405, and needle-valve 6 conical needle tips are in the needle-valve chamber 11 of needle-valve body 5, and needle-valve 6 is a Spielpassung with needle-valve body 5.Shown in Figure 1A, the inwall in needle-valve chamber 11 is a conical surface, 6 nozzle openings 10 is arranged with needle-valve chamber 11 and needle-valve body 5 external communications on the wall in needle-valve chamber 11, and under the normality, under the effect of control piston 2 thrusts and return spring 3 restoring forces, needle-valve 6 is with nozzle opening 10 sealings.

When oil sprayer is worked; Fuel oil gets into pintle nozzle match-ing parts and becomes pressure balance with control valve coupling space row, and ECU gives the oil sprayer firing current under suitable condition, and solenoid valve is connected and attracted armature up; Original pressure balance this moment is destroyed; Needle-valve drive stroke adjustment piece and control piston are up, open the nozzle opening in the needle-valve chamber 11, accomplish the fuel injection task.The effective length of stroke adjustment piece has determined the stroke that needle-valve is opened, thereby the unlatching of control needle-valve realizes the control to fuel injection quantity.

The utility model is applicable to the engine fuel injection system of automobile.

Claims

1. the oil sprayer of a can regulate control valve stroke; It is characterized in that; Oil injector body (l) is located coaxial the connection with needle-valve body (5) through 2 locating studs (9) on end face; Tight cap (7) is enclosed within needle-valve body (5) and upward and with oil injector body (l) is threaded the cavity of oil injector body (l), needle-valve body (5) and tight cap (7) composition oil sprayer; Stroke adjustment piece (4) places between control piston (2) and the needle-valve (6), the core body of stroke adjustment piece (4) and control piston (2) and the coaxial composition oil sprayer of needle-valve (6), and the core body of oil sprayer is coaxial to be placed in the cavity of oil sprayer;

Said stroke adjustment piece (4) is made up of coaxial small cylinder (401) and large cylinder (402); The small cylinder end face (403) of stroke adjustment piece (4) is the plane; The large cylinder end face of stroke adjustment piece (4) is circular groove (405), and the small cylinder of stroke adjustment piece (4) and the junction surface of large cylinder are shoulder face (404);

Control piston (2) is coaxial to be placed in the oil injector body (l); Stroke adjustment piece (4) small cylinder is in oil injector body (l); Small cylinder end face (403) contacts with control piston (2), and return spring (3) is enclosed within on the small cylinder (401) of control piston (2) and stroke adjustment piece (4) in oil injector body (l); One end of return spring (3) compresses through packing ring (8) and oil injector body (l); The other end of return spring (3) contacts with the shoulder face (404) of stroke adjustment piece (4), and needle-valve (6) is in needle-valve body (5), and the planar ends of needle-valve (6) contacts with stroke adjustment piece (4) in groove (405); The conical needle tip of needle-valve (6) is in the needle-valve chamber (11) of needle-valve body (5); The inwall in needle-valve chamber (11) is a conical surface, 6～8 nozzle openings (10) is arranged with needle-valve chamber (11) and needle-valve body (5) external communications, under the normality on the wall of needle-valve chamber (11); Under the effect of control piston (2) thrust and return spring (3) restoring force, needle-valve (6) seals nozzle opening (10).

2. the oil sprayer of can regulate control valve stroke according to claim 1 is characterized in that, said needle-valve (6) is a Spielpassung with needle-valve body (5).