CN102734026A - Double-seat multiple-atomizing nozzle - Google Patents

Abstract

The purpose of the present invention is to provide a double-seat surface multiple atomization nozzle, including a needle valve body, a needle valve, an oil storage chamber, and a spray hole. The needle valve is installed in the needle valve body, and the needle valve and the needle valve body form an annular oil chamber. There is an oil storage cavity in the middle and lower part of the needle valve, and an oil hole connecting the annular oil cavity and the oil storage cavity is opened in the needle valve. There are a first nozzle hole and a second nozzle hole at the bottom. When the needle valve is at the lowest position, the upper seat surface of the needle valve seals the first nozzle hole, and the lower seat surface of the needle valve seals the second nozzle hole. When the needle valve moves upward, The first spray hole is connected to the annular oil chamber, and after the needle valve continues to move upward, the second spray hole is connected to the oil storage chamber. The invention can realize secondary or multiple atomization when the same fuel is injected, improves the atomization effect of the fuel and the mixing degree of the mixed gas in the combustion chamber, effectively improves the thermal efficiency of the internal combustion engine, and improves the power and fuel efficiency of the internal combustion engine. economy.

Description

Double seat surface multiple atomization nozzle

technical field

The invention relates to an internal combustion engine, in particular to a nozzle of the internal combustion engine.

Background technique

The nozzle is the main part of the fuel injector of the internal combustion engine. Its basic function is to inject the fuel into the combustion chamber in the form of an oil beam through the nozzle hole, and cooperate with the shape of the combustion chamber and the airflow movement to form a good mixture so that the fuel is Burn as fully as possible in the combustion chamber. In an internal combustion engine, the completeness of fuel combustion depends to a large extent on the atomization quality of the fuel. This is because when the fuel atomization is poor, the degree of mixture mixing is not good, the afterburning stage increases during fuel combustion, and the thermal efficiency of the internal combustion engine Significant decline, resulting in black smoke from the exhaust, carbon deposits in the combustion chamber, and even the internal combustion engine cannot work normally, reducing the power and fuel economy of the internal combustion engine.

Contents of the invention

The object of the present invention is to provide a double-seat multi-atomization nozzle which overcomes the defect of poor atomization of the single injection of the existing nozzle.

The purpose of the present invention is achieved like this:

The double-seat surface multiple atomization nozzle of the present invention includes a needle valve body, a needle valve, an oil storage chamber, and a spray hole, and is characterized in that: the needle valve is installed in the needle valve body, and the needle valve and the needle valve body form an annular oil chamber, There is an oil storage cavity in the middle and lower part of the needle valve, and an oil hole connecting the annular oil cavity and the oil storage cavity is opened in the needle valve. The first nozzle hole and the second nozzle hole are opened at the bottom. When the needle valve is at the lowest position, the upper seat surface of the needle valve seals the first nozzle hole, and the lower seat surface of the needle valve seals the second nozzle hole. When the needle valve moves upward, The first spray hole is connected to the annular oil chamber, and after the needle valve continues to move upward, the second spray hole is connected to the oil storage chamber.

The present invention may also include:

1. There is also a third nozzle hole on the needle valve body, the third nozzle hole is located between the first nozzle hole and the second nozzle hole, when the needle valve is at the lowest position, the seat surface of the needle valve seals the third nozzle hole, Before the needle valve is located at the uppermost position, the third spray hole communicates with the oil storage chamber.

2. There are at least four oil through holes, the oil through holes are symmetrically arranged to cross the axis of the oil storage cavity, and the diameter of each oil through hole is the same.

3. The angle between the axes of each nozzle hole is less than 90 degrees.

The advantage of the present invention is that: the present invention can realize secondary or multiple atomization when the same fuel is injected, improves the atomization effect of the fuel and the mixing degree of the mixed gas in the combustion chamber, effectively improves the thermal efficiency of the internal combustion engine, and avoids the The incomplete combustion of fuel in the combustion chamber improves the power and fuel economy of the internal combustion engine.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention;

Fig. 2 is an enlarged schematic diagram of the structure of the lower seat surface of the needle valve in Embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of Embodiment 2 of the present invention;

Fig. 4 is an enlarged schematic diagram of the structure of the lower seat surface of the needle valve according to Embodiment 2 of the present invention.

Detailed ways

The present invention is described in more detail below in conjunction with accompanying drawing example:

The multiple atomization nozzle with double seat surface of the present invention mainly includes a needle valve body 1, a needle valve 2, an injection hole 3, a needle valve lower seat surface 4, a needle valve upper seat surface 5, an oil storage chamber 6, and an oil passage hole 7, among which The feature is: there is a cylindrical oil storage chamber 6 in the middle of the lower part of the needle valve 2, and the oil storage chamber 6 communicates with the annular oil chamber between the needle valve body 1 and the needle valve 2 through the cross-arranged oil passage holes 7, and the needle valve body There are two sealing seat surfaces on 1, and the fuel injection of injection hole 3 is controlled through the lifting and seating of needle valve 2.

Implementation mode 1:

Combining with Figures 1 and 2, Figure 1 is a schematic diagram of the overall structure of the double-seat surface secondary atomization nozzle of the present invention, including a needle valve body 1, a needle valve 2, a spray hole 3, a needle valve lower seat surface 4, and a needle valve upper seat surface 5 , Oil storage cavity 6, oil through hole 7. The fuel that enters the injector from the high-pressure fuel pipe enters the annular oil chamber between the nozzle needle valve body 1 and the needle valve 2 through the oil tank, and the high-pressure fuel in the annular oil chamber enters through the cross-arranged oil passage holes 7 on the needle valve 2 There is an oil storage cavity 6 in the lower part of the needle valve 2, and the entire oil storage cavity 6 is filled. The needle valve lower seat surface 4 and the needle valve upper seat surface 5 on the needle valve body 1 form two sealing belts with the needle valve 2. When the needle valve 2 is controlled to lift up to prepare for fuel injection, the needle valve 2 leaves the needle valve lower seat Surface 4 and the upper seat surface 5 of the needle valve, the injection hole at the upper seat surface 5 of the needle valve is opened, and the fuel injection starts, while the injection hole at the lower seat surface 4 of the needle valve has just risen because the needle valve 2 has just risen, although the needle valve 2 and the needle valve The lower seat surface 4 has been disengaged, but the lift of the needle valve 2 is not enough to open the nozzle hole at the needle valve lower seat surface 4. At this time, the injection hole at the needle valve lower seat surface 4 does not spray oil. When the needle valve 2 is controlled to continue When it is lifted, the injection holes at 4 on the lower seat surface of the needle valve are opened, all the injection holes of the injection hole 3 are opened, and all the injection holes of the nozzle inject fuel. Arranged at an angle of 90 degrees, the primary atomized fuel oil beams sprayed into the combustion chamber from the nozzle holes 3 will collide with each other, and the fuel will be atomized again due to the impact of the high-speed primary atomized oil beams . During the descent of the needle valve 2, as the needle valve 2 gradually contacts and seals with the needle valve lower seat surface 4 and the needle valve upper seat surface 5, each nozzle hole of the injection hole 3 is closed sequentially, and the fuel injection ends.

Implementation mode 2:

3-4, FIG. 3 is a schematic diagram of the overall structure of the double-seat three-time atomization nozzle of the present invention. On the basis of Embodiment 1, a group of injection holes is added. As described in Embodiment 1, when the needle valve 2 is raised, the injection hole 10 starts to inject oil first, and then the injection holes 8 and 9 inject oil in sequence. , when the nozzle hole 8 is opened, the fuel sprayed from the nozzle hole 10 collides with the fuel sprayed from the nozzle hole 8, and the fuel is atomized for the second time. The fuel is firstly impacted by the fuel sprayed from the injection hole 9, and the fuel is atomized for the second time, and then the fuel sprayed by the second atomization collides with the fuel oil beam sprayed from the injection hole 8. Due to the impact between the oil beams, the fuel oil is again Atomization realizes multiple atomization of fuel. The oil passage holes 7 connecting the oil storage chamber 6 with the annular oil chamber between the needle valve body 1 and the needle valve 2 are symmetrically arranged to cross the nozzle axis, and the axes of the two oil passage holes 7 that are not on the same side and have different heights are on the same line On the one hand, it ensures the good circulation of the fuel inside and outside the oil storage chamber 6, and avoids the movement delay of the needle valve 2 caused by the oil storage chamber 6 on the needle valve 2. The reasonable arrangement of the double sealing seat surfaces of the needle valve 2 and the needle valve body 1 and the injection holes realizes multiple atomization when the same fuel is injected, improves the atomization effect of the fuel and the mixing degree of the mixture in the combustion chamber, The thermal efficiency of the internal combustion engine is effectively improved, the incomplete combustion of fuel in the combustion chamber is avoided, and the power and fuel economy of the internal combustion engine are improved. According to the different injection requirements of the internal combustion engine, multiple oil through holes and injection holes can be configured to form a double-seat multiple atomization nozzle to achieve the best atomization effect.

Claims (5)

1. two-seater face atomizer nozzle repeatedly comprises needle-valve body, needle-valve, shoe cream room, spray orifice, and it is characterized in that: needle-valve is installed in the needle-valve body; Needle-valve and needle-valve body form annular oil cavity, and the middle and lower part has shoe cream room in the needle-valve, also have the oil through that is communicated with annular oil cavity and shoe cream room in the needle-valve; The needle-valve underpart is provided with seat surface under seat surface on the needle-valve, the needle-valve, and the needle-valve body underpart has first spray orifice, second spray orifice, when needle-valve is positioned at lowest positions; Seat surface seals second spray orifice under needle-valve seat of honour face seal first spray orifice, the needle-valve, and when needle-valve moved up, first spray orifice was communicated with annular oil cavity; After needle-valve continued to move up, second spray orifice was communicated with shoe cream room.

2. two-seater face according to claim 1 is atomizer nozzle repeatedly; It is characterized in that: the 3rd spray orifice also is set on the needle-valve body; The 3rd spray orifice is between first spray orifice and second spray orifice, and when needle-valve was positioned at lowest positions, seat surface sealed the 3rd spray orifice under the needle-valve; Needle-valve is positioned at before the position, the top, and the 3rd spray orifice is communicated with shoe cream room.

3. two-seater face according to claim 1 and 2 is atomizer nozzle repeatedly, it is characterized in that: described oil through is at least four, and oil through is symmetrical in shoe cream room axis intercross arrangement, and the aperture of each oil through is identical.

4. two-seater face according to claim 1 and 2 is atomizer nozzle repeatedly, it is characterized in that: the angle between each spray orifice axis is less than 90 degree.

5. two-seater face according to claim 3 is atomizer nozzle repeatedly, it is characterized in that: the angle between each spray orifice axis is less than 90 degree.

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