CN2293909Y

CN2293909Y - Multi-function fuel injection spark plug

Info

Publication number: CN2293909Y
Application number: CN 97210128
Authority: CN
Inventors: 唐家永; 姜功祥; 杨新癸; 唐琳海
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-18
Filing date: 1997-04-18
Publication date: 1998-10-07
Anticipated expiration: 2007-04-18

Abstract

The utility model provides a multi-function fuel injection spark plug, comprising a steel body which comprises a fuel inlet, an injection opening and a fuel cavity and a fixing insulating body with a spring cavity connecting with the steel body. One end of a movable insulating body in the steel body extends into the spring cavity. An electrode connecting head is arranged on the fixing insulating body. A center electrode is arranged in the movable insulating body. Both ends of a spring which is arranged in the spring cavity of the fixing insulating body are respectively contacted with the electrode connecting head and the center electrode. A bending-head electrode which is arranged on the injection opening of the steel body corresponding to the center electrode. The utility model has the advantages of simple structure and low cost, enhances the volumetric efficiency of an engine, and improves the efficiency.

Description

Multifunctional fuel jet spark plug

The utility model relates to a kind of spark plug, particularly be a kind of collect fuel spray with ignition function be the multifunctional fuel jet spark plug that is used for explosive motor of one.

At present domestic and international common jet type internal combustion engine, no matter enter the cylinder by the injection of the inlet valve mouth of pipe or from cylinder top direct fuel injection, commonly all finish by injector independently, spark plug only has single ignition function, complex structure, manufacturing cost is higher, and various countries adopt compressed natural gas, particularly China to improve on fuel vehicle engine basis, make it to develop into dual-fuel automobile, the deficiency that exists former engine power to descend.

In view of above reason, the purpose of this utility model is in order to provide a kind of simple in structure, cost is low, can strengthen engine volume coefficiency, improve power, the scope of application is wide, can be widely used in the multifunctional fuel jet spark plug that integrates burner oil and light a fire of compressed natural gas (CNG) substitute fuel automobile especially.

The purpose of this utility model is achieved in that the steel body that contains fuel inlet, jet, fuel cavity in the utility model spark plug, the insulator of deciding that contains spring cavity that is connected with the steel body, moving insulator one end that is arranged in the steel body stretches into spring cavity, deciding has the electrode connector on the insulator, central electrode is contained in the moving insulator, be loaded on the both ends of the spring of deciding in the insulator spring cavity and contact with central electrode with the electrode connector respectively, on the jet place of steel body and central electrode relevant position, elbow electrode (referring to Fig. 1, Fig. 2) is arranged.

Fit and the peripheral seal dissepiment of deciding on insulator and the steel body (referring to Fig. 1, Fig. 2) that is tightly packed in are with it arranged on the above-mentioned moving insulator.

Engage step with deciding the insulator joint on the above-mentioned steel body, decide insulator the seal dissepiment periphery is pressed on the joint step on the steel body (referring to Fig. 1, Fig. 2).

On the fuel cavity of above-mentioned steel body taper hole is arranged, on the moving insulator cone (referring to Fig. 1, Fig. 2) that cooperates with taper hole is arranged, taper hole and cone form axial seal through grinding to form seal band, the elastic force of spring is closed seal band sealing and static state, under the effect of fuel pressure, overcome elastic force and make the axial lifting of insulator, constitute ejector function.

Cone on the above-mentioned moving insulator is positioned at outside the steel fluid fuel chamber, and the spring of deciding in the insulator spring cavity is tension spring (referring to Fig. 1), is used for low-pressure fuel injection.

Cone on the above-mentioned moving insulator is positioned at steel fluid fuel chamber, and the spring of deciding in the insulator spring cavity is compression spring (referring to Fig. 2), is used for middle and high pressure and sprays.

The utility model is connected on the cylinder head.Referring to Fig. 1, Fig. 2, during the utility model work, electrode connector 1 is connect high-voltage line, there are relevant pressure and the fuel of flow time to enter in the steel fluid fuel chamber, overcome spring force or under the spring force effect, make insulator do axial motion, fuel sprays in the cylinder by seal band and the jet through opening on it, the electrode connector successively with spring, moving insulator in the central electrode mutual conduction, cooperate the gap that adapts between the elbow electrode on the steel body when high voltage pulse produces, to discharge arcing and have the plug ignition function.

Compare with existing technology, the utlity model has following advantage:

1, simple in structure, easy to manufacture, cost is low;

2, the function of optimization fuel engines, available substitute fuel and pluralities of fuel, environmental pollution is little;

3, can strengthen engine volume coefficiency, can make the compressed natural gas engine improve power and reach about 2%;

4, the utility model, acts on the fuel injection of explosive motor and lights the working medium work done in liquid state applicable to fuel under gaseous state, middle and high pressure and the low-pressure state.

5, the scope of application is wide, is widely used in direct injection ic engine, is specially adapted to compressed natural gas substitute fuel automobile engine.

Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model low-pressure fuel injection spark plug configuration schematic diagram.

Fig. 2 is the middle and high pressure jet spark plug of a utility model structural representation.

Embodiment 1:

Fig. 1 has provided the utility model embodiment 1 low-pressure fuel injection spark plug configuration schematic diagram.Fuel inlet 13, jet 2, fuel cavity 3 are arranged on the steel body 1.Moving insulator 4 places the steel body, one end is fitted in deciding insulator 5 and will be linked in sealing on the moving insulator on mould 6 is pressed on step 7 in the steel body on the steel body, electrode connector 8 one ends stretch into to be decided in the insulator and is connected and scalable elastic force size with tension spring 10 1 ends in being loaded on the spring cavity of deciding in the insulator 9, and an end that is loaded on the interior central electrode 11 of moving insulator is connected with the spring other end.In steel body bottom taper hole 12 is arranged, moving insulator 4 stretches out the fuel cavity place the cone 14 that cooperates with taper hole, forms the axial seal endless belt between taper hole, cone.On the steel body, be positioned at the jet place symmetrical elbow electrode 15 is arranged.The steel body is connected on the cylinder head and direct bonding by the screw thread on it 16.

Embodiment 2:

Fig. 2 has provided the utility model embodiment 2 middle and high pressure jet spark plug structural representations.Present embodiment 2 is basic same with embodiment 1, do not exist together is that the spring of deciding in the insulator spring cavity is a compression spring 17, its two ends contact with central electrode with the electrode connector respectively, and the cone 18 on the moving insulator is positioned at fuel cavity, and cooperate with taper hole 19 on the steel body and form the axial seal endless belt.

Claims

1, multifunctional fuel jet spark plug, it is characterized in that the steel body that contains fuel inlet, jet, fuel cavity is arranged in the described spark plug, the insulator of deciding that contains spring cavity that is connected with the steel body, moving insulator one end that is arranged in the steel body stretches into spring cavity, deciding has the electrode connector on the insulator, central electrode is contained in the moving insulator, be loaded on the both ends of the spring of deciding in the insulator spring cavity and contact with central electrode with the electrode connector respectively, on the jet place of steel body and central electrode relevant position, the elbow electrode is arranged.

2, multifunctional fuel jet spark plug as claimed in claim 1 is characterized in that having on the described moving insulator fit and the peripheral seal dissepiment of deciding on insulator and the steel body that is tightly packed in it.

3, multifunctional fuel jet spark plug as claimed in claim 2 is characterized in that engaging step with deciding the insulator joint on the described steel body, decides insulator the seal dissepiment periphery is pressed on the joint step on the steel body.

4, multifunctional fuel jet spark plug as claimed in claim 1 is characterized in that on the fuel cavity of described steel body taper hole being arranged, and on the moving insulator cone that cooperates with taper hole is arranged.

5, multifunctional fuel jet spark plug as claimed in claim 4 is characterized in that the cone on the described moving insulator is positioned at outside the steel fluid fuel chamber, and the described spring of deciding in the insulator spring cavity is a tension spring.

6, multifunctional fuel jet spark plug as claimed in claim 4 is characterized in that the cone on the described moving insulator is positioned at steel fluid fuel chamber, and the described spring of deciding in the insulator spring cavity is a compression spring.