JPS59201921A - Diesel engine with swirl-forming combustion chamber - Google Patents

Abstract

PURPOSE:To improve combustibility of a Diesel engine by forming main and sub jets in an injection nozzle which faces to the interior of a swirl-forming combustion chamber and forming a fuel storage recess which is made on a heat shield in the opposed position to the end of the subject and injecting fuel from the sub jet only at the low loading time. CONSTITUTION:In a fuel injection nozzle 12 facing to the interior of a swirl- forming combustion chamber 2 which is formed inside a cylinder head 1, the nozzle body, namely, the shell of the nozzle 12 is positioned in a cylindrical mounting hole 14 via a heat shield 10. The nozzle body 13 has a main jet 6 which is opened and closed by a needle valve making advancing and retracting motions. Sub jets 17 and 18 each having a relatively small diameter are formed in the valve seating face 16 of the interior bottom part of the nozzle body 13. At an idling or other time requiring less fuel, fuel is injected from said jets 17 and 18 only. A fuel storage recess 11 is formed on the pawl part 10a of the heat shield 10 in the position opposed to the end 17a of the sub jet 17.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a swirl combustion chamber type Diegel engine, and in particular, J5-C1 combustion is slowed down during idling and under low load to reduce noise and photography. 1-IC,C while reducing to large rlJ
The present invention relates to a vortex combustion chamber type diesel engine that can suppress the generation of o, etc. as much as possible.

[Technical disadvantages of the invention and other problems] In general, a swirl combustion chamber type diesel engine has two swirl combustion chambers defined in a cylinder head 1, as shown in FIG. This combustion chamber 2 is communicated with a cylinder chamber 3 formed in a cylinder block (not shown), and generates a vortex S of compressed air flowing in due to the upward movement of the piston. Further, the combustion chamber 2 is provided with a fuel injection nozzle 4 for injecting fuel F into the chamber. The mixture vaporization of the fuel F injected from the injection nozzle 4 is promoted by the vortex S, and is ignited and combusted by the heat of compression.

By the way, the conventional Atsu-C is atomization of the injected fuel.
If the vaporization is not good, there will be a problem of ignition delay.This ignition delay is due to the delay in ignition, which creates a high energy state in the combustion chamber 2, and at the same time as ignition, explosive combustion progresses and the cylinder burns. This increases the rate of pressure rise in the chamber 3 and generates large pressure waves (the pressure waves collide with the cylinder wall etc. and generate noise and vibration, especially during andling). In view of the above circumstances, the inventor of the present invention is considering a swirl combustion chamber type diesel engine as shown in FIG. 2.

Instead of the injection nozzle 4 on the right side of the J: single injection 15 shown in FIG. An injection nozzle 8 is provided. This injection nozzle 8 is used when a small amount of fuel is sufficient, such as when idling or when loading at a low angle.
By reciprocating the side valve 9 with the side valve 9 closed, the fuel F is injected only from the sub-injection lower. On the other hand, the inner wall 2a of the combustion chamber 2 is formed in a cylindrical shield 10 that surrounds the 8A injection nozzle 8 and prevents heat transfer from the high-temperature cylinder 1. 1lEi with Ruru! ) A fuel storage chamber 11 is formed in a claw portion 10a for locking the nozzle 8 so as to face the sub-injection lower. This fuel lamp chamber 11 is configured to partially receive the fuel F injected in a mist form from the sub-injection lower during idling and store it in a liquefied state, and the fuel scattered around it is mixed by the vortex S. It is vaporized and immediately subjected to combustion. Then, the fuel stored in the fuel stone storage 11 is left undisturbed, and the heat of compression causes ignition and combustion to occur, leading to an increase in the temperature inside the combustion chamber 2, prior to the next fuel injection. i! - 3. A method that attempts to prevent ignition delay by improving the ignitability of the fuel injected from the sub-ring lower again.

However, even with this proposal, the amount of storage in the light chamber 11 is excessive (
・If there is, the fuel in the liquefied state may be vaporized (the rate of combustion will be too high, and even if some of the stored fuel that should be completely combusted before fuel injection is in the combustion process, it will still be at a relatively low temperature +
It is conceivable that the gas will remain in the combustion chamber, flow out from the combustion chamber 2 to the cylinder chamber 3 as unburned matter, and be discharged as is.
There are concerns that this may worsen CO2 emissions.

[Object of the Invention] The present invention was devised in view of the above-mentioned problems, and its purpose is to suppress deterioration of l-(C, etc.) as much as possible during idling, low load, etc. To provide a vortex combustion chamber type diesel engine which can slowly vaporize the injected fuel at the same time and slow its combustion to reduce bed height and vibration to 11J.

[Embodiments of the Invention] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 3, reference numeral 2 denotes a vortex combustion chamber defined within the cylinder head 1. In this combustion chamber 2, a vortex S of compressed air is generated and a fuel is injected into the chamber. A fuel injection nozzle 12 is installed. This ll
The 13-shot nozzle 12 has a cylindrical shape in which a nozzle body 13 forming an outer shell communicates with the inside of the combustion chamber 2. The outside 9138 on the side of the combustion chamber is engaged with the folded annular claw portion 10a of the shield 10. This nozzle body 13
As shown in FIG. 4, a fuel supply hole 15 through which fuel is fed under pressure from the fuel pump is formed on the inside of the fuel supply hole 15. Via the valve seat surface 16, it communicates with a main nozzle 6 formed to inject fuel into the combustion chamber 2. Further, in the middle of the valve seat surface 16, a relatively small diameter sub-nozzle port 17, 18 is formed by branching from the main nozzle port 6 (radially outward of the nozzle body 13). There is a supply hole 15 inside.
The needle valve 9 is installed from the side to the main chant [-16].

The needle valve 9 mainly has a shaft-shaped first valve for opening and closing the main nozzle 6.
It includes a valve body portion 9a and a second valve body portion 9b shaped like a rod for opening and closing the supply hole 15. The needle valve 9 is configured to follow the crank angle by an operating mechanism (not shown) and to be operated again 11 with a lift amount depending on the load condition. The first valve body portion 9a is set at a depth that can maintain the main opening 6 in an open state when the required fuel is small and the lift amount of one valve 9 is small, that is, when idling or under low load. It is inserted into the spout 6.

The second valve body portion 9b is seated on the valve seat surface 16 in line contact along its circumferential direction, and opens and closes the supply hole 15 by constantly following the reciprocating movement of the copper piece 9. J, U (constituted.

The sub-injections L117 and 18 have their suction sides connected to these valves N+ and 16.
and the second valve body portion 9b, and communicates with the gap C through which fuel is supplied from the supply hole 15 even when the main injection hole L16 is open. Then, when the amount of injected fuel such as C1j'I1 to ring IL'1 is small, these sub-nozzles 17 and 18
The fuel 11C404 is configured to be made only from the fuel 11C404.

In this embodiment, as if the sub-injection of the injection nozzle according to the above proposal was divided, two i+PI IIr, l I
-, 117.

18 is provided, and '1' is supplied from the supply hole 15.
CIIQ IJiJ J 4111 is configured to distribute fuel for each cycle.

A fuel lamp chamber 11 is provided facing the ejection end 17a of one of the U cylinders 111 and 17 at the back of the sub-injections IJ, 117 and iε3 configured in this way. The combustion chamber side outer wall 133a of the main body 13 is folded back by a weight J, and is formed into the claw portion 10a of the heat seals 1 to 10 that constitute a part of the inner wall 2a of the combustion chamber 2. Listening to the sound facing the spout 17]
It is formed into four parts, such as a bottomed hole or a vortex, and is configured to store the atomized fuel injected from the top 17 in an acceptable state.

Other sub-nozzles 18 as shown in Figures 3 and 4
The jetting end 18a is the vortex S generated in the combustion chamber 2.
It is formed facing the inner wall 2a in the downstream direction, and is configured so that the ejected fuel F is forced to flow in a thin liquid film along the inner wall 2a, thereby suppressing vaporization and mixture vaporization due to the vortex S. In addition, the ejections GE17a, 1 of these sub-nozzles 17.18
8b is formed with a small diameter, especially the sub-nozzle 18 facing the inner wall 2a.
By reducing the particle size of the fuel ejected from the liquid film 1-, the liquid film 1- is easily evaporated. That is, by converting the fuel into a liquid film and flowing the liquid film to the substream side of the vortex S, the fuel is vaporized and
Mixture vaporization can be suppressed, but if the evaporation of the fuel is severely damaged, unburned matter will be released after combustion. Lee
By supplementing the vaporization of the fuel and achieving a balance between these two, slow combustion is achieved while suppressing the deterioration of HC etc.
be.

Next, the operation of the present invention will be described.

As shown in FIGS. 3 and 4, when idling or under low load, the hook valve 9 reciprocates and the second valve body 9b opens and closes the fuel supply hole 15 to supply fuel to the gap C. Also the first
The valve body portion 9a maintains the opening 6 in the open state, and fuel for 1" fuel is distributed (injected) from each sub-injection IN 17.18b) into the fuel lamp chamber 11 according to the injection timing. The atomized fuel injected from the outgoing sentry 1'17 is received in the lamp chamber 11, and is stored in a liquefied state C without being subjected to combustion during injection.The fuel stored here [5
In the compression stage of the primary υ cycle, there are ☆ (
After being heated by the heat of compression and vaporized (flowing into the combustion chamber 2, ignited and combusted, and raising the temperature inside the combustion chamber 2 to 3 degrees), the fuel is heated to l1rA IJ-1. Improves ignitability and prevents burning, eye 1 ~ ring n,!
The name of f etc? 3 can be suppressed comprehensively. At this time, the fuel injected from the auxiliary nozzle 17 and stored in the fuel lamp chamber 11 is distributed to other auxiliary nozzles 18, so there is no excess, and the fuel is accurately and sufficiently distributed before the ffi ¥31 fountain. By avoiding the evaporation and contributing to complete combustion and improving ignitability, it is possible to suppress the remaining unburned matter during the combustion process and to prevent the deterioration of IC, CO, etc. On the other hand, the fuel injected from the secondary injection port 18 forms a wide thin liquid film 1 on the inner wall 2a of the combustion chamber 2 immediately after injection. At this time, since the direction in which the liquid film is formed is on the downstream side of the vortex S, that is, in the same direction as the flow direction of the vortex S, the liquid film L'/)' height?
Peeling off from the inner wall 2a due to the eddy current S of the compressed air can be suppressed to a maximum extent. However, vaporization of the fuel is not prevented at all, and because the jet 1'18 is formed with a small diameter, the particle size itself is relatively thin, and it flows in a thin film over a wide area, resulting in a liquid film. It is in a state where it easily evaporates. Therefore, as mentioned above, the fuel stored in the previous cycle is compressed and combusted in the culm to raise the temperature inside the combustion chamber 2, so that the fuel that is vaporized from the wall is ignited and burned.
It will follow the slow burn of professional wrestling. This kind of slow combustion further suppresses the pressure inside the cylinder chamber 3, causing noise and
Photography can be suppressed. At this time, within C1! The fuel flowing through the fuel tank 42a has a thin film and fine particles, and deterioration of IC and the like can be suppressed from this point of view as well.

In addition, from Tsutomi operation to high-load operation, combustion is performed in a state in which the main nozzle 6 is opened by the ε1 valve 9 and aeration is promoted by the vortex S. A small amount of fuel will be injected from the nozzle 17.
The temperature inside will be very high, so if it has any negative effects, it will be worse.

] Modified Embodiment 1 A modified example of the above embodiment is shown in FIGS. 5 and 6 on a smaller scale.

'fr 5 In the figure: Show 16 U) Ha, 1 '') Notill l!11 If i 8 C' I-l (
! : It is something that can be achieved. This sub+1jQ 111ε3
is formed facing the downstream direction of the vortex S and along the inner wall 2a of the 1IC combustion chamber 2. In addition, the claw n1S10a of the shield 10 causes the fuel injected from the sub-nozzle 18 to immediately adhere to the heater 1, forming a liquid film. It constitutes a guide surface 19 for flowing to Y 2 a. That is, there is one such that a part of the inner wall 2a is extended to the sub-nozzle 18 by the guide surface 19. And on this guide surface 19,
A fuel storage space 11 is formed in the direction in which the fuel flows.

Once a predetermined amount of fuel is stored in the lamp chamber 11, the A part L1 will be used up. In this modified example, similar to the above embodiment, the 4f effect is achieved. In particular, in this protruding example, 4! Merits of reducing the number of soils] -
There is. [The fuel injected from the sub-nozzle 18 is immediately applied to the wall surfaces 1 to 19 (=JnamesaI!) (As in the above embodiment, the fuel arrives at the inner wall 2a. During this time, it is possible to suppress vaporization and mixture vaporization by being caught in the vortex S, and to further alleviate rapid combustion.

The fuel injection nozzle 12 employed in the present invention is similar to a so-called paving toe nozzle that performs a preliminary nQ operation before injecting fuel from the main nozzle 6 in order to improve fireability. There is something that has a completely different effect (there is one. A binto nozzle has its sub-injection 1 facing the upstream side of the vortex and injects fuel in advance before injection from the main nozzle to promote the mixture vaporization!) The sub nozzle 18 of the nozzle 12 adopted in the present invention functions for fuel injection of the nozzle 11, Y, etc.
(7) Forms an oil film of fuel along the upstream inner wall 2a that suppresses mixture vaporization.

What is shown in FIG. 6 is the above modification (the guide surface 19 shown
is formed by protruding and expanding the combustion side M'''I 3 a of the nozzle body 13.
The kite 19 is integrally formed in the nozzle body 13 where the sub-jet 1 18 is formed. It is necessary to accurately and clearly apply the connecting parts between the secondary I-side opening 18 and the blade face 19 where viscous damping is required.

It goes without saying that this modification also provides the same effects as the above embodiment.

Effects of the Invention] In summary, according to the present invention, the following excellent effects can be achieved.

1)) Install a sub-nozzle for injecting fuel during idling, low load, etc. R-Hoto?
Since the final combustion 1 contributes to the rise in temperature and odor in the combustion dormitory during the next cycle's fuel injection 1) and compression stage, ignition delays can be prevented as much as possible and noise and vibrations reduced. It's a monkey.

2) Place the injection end facing the inner wall of the combustion chamber to form a liquid film that flows the fuel flowing along the inner wall. Slow combustion is gradually achieved by suppressing the rapid vaporization and vaporization.In this aspect, too, noise and vibration are significantly reduced.

3) Furthermore, the fuel injected from the sub-injection 1-1 was distributed to reduce the excessive evaporation and combustion ratio due to excess fuel in the fuel meter chamber, and to make the fuel particles as fine as possible over a wide range. (I
By forming a liquid film to compensate for its evaporation, the generation of unburned matter can be suppressed as much as possible (l-1c, deterioration of GO'8 can be suppressed).

4) The structure is simple and can be easily adopted.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional example, Fig. 2 is a side sectional view of the studied embodiment, Figs. is an enlarged sectional view of the main part of Figure 3,
5 and 6 (in the 1° view showing the modified embodiment in full length side 117i side view, 2 is the swirl combustion chamber, 28 is the inner wall of the
5 is ■-nozzle, 11 is quick combustion, 12 is II ('l river jet, 17.18 is secondary jet ['', 17a, 18a4 are the spout ends, ``is fuel, S is vortex flow. (゛Yes.. 1 person is required) 'Jikyoku Chubu, 1 (Membership proxy entry 1!lj:j2 Kinutani I1,
Engraving of Al1 drawings (no changes to the contents) Figure 1 Figure 5 Procedures J-E (Voluntary initiative) June 2, 1981 Commissioner of the Special 61 Agency Sai°1 Kazuto Sugi Tono1, Matter I'1
Indication of ``lχ''■ Application No. 1987-76388 2, Name of the invention vortex combustion chamber type diesel engine 3, Person making the amendment, case relationship Special% Jf Applicant (017) Izu) Jidosha Co., Ltd. 4, agent mail No. 105 Higashi≦Shito Port S Waka 1-chome 6-7 July Ai Wakayama Lawyers Building Sponsored 6, Sleeve W EJ Specification Part II Claims Item 1 Detailed description of the invention and 7. Contents of amendment (1) The entire specification has been corrected as stated in the separate report. Description 1. Name of the invention: Whirlpool combustion chamber diesel engine Engine 2, Claims (1) An injection nozzle having a 21-jet "] for injecting fuel 1li4 into the vortex combustion chamber is provided, and the main jet 10 is branched from the spray nozzle. Low load 114 Leading to snow [”
At the same time, a part of the fuel injected from the sub-nozzle is stored in the combustion chamber and is vaporized in the next shoreline stroke. A vortex flow characterized in that a fuel lamp chamber is formed to cause the fuel to flow out, and the 1β outlet end of the L; Combustion chamber type Diegel (Ikuseki) (2) The above sub-nozzle is located in the above fuel lamp chamber, and the 1-pi vortex flow is 1.
The vortex combustion chamber type diesel engine according to claim 1, which is divided so as to face the inner wall of the combustion chamber in the flow direction. (3) The fuel lamp chamber is provided on the inner wall of the combustion chamber facing the ejection end of the sub-nozzle.
+2 ui 2 JΩ swirl combustion chamber type diesel engine. (/l) - 1 memorized combustion 'A'' + lti' stain uri A vortex combustion chamber type deep pill engine according to Claims 1 to 3. 3. Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a swirl combustion chamber type diesel engine according to claims 1 to 41. Regarding the engine, in 1, f, Lanoi 1 to ring, and at low load, the combustion is slowed down and the opening noise and vibration are reduced to 1" while HC, GO
This relates to the J5 EPIL engine, which employs a vortex combustion system that suppresses the generation of such phenomena as much as possible. [Technical Overview of the Invention and Its Problems 1 Generally, in a swirl combustion chamber type diesel engine, a swirl combustion chamber 2 is defined within a cylinder head 1, as shown in FIG. This combustion chamber 2 is in communication with a cylinder chamber 3 formed in the cylinder nozzle 1 (not shown), and the vortex S of the inflowing compressed air is The combustion chamber 2 is also provided with a fuel injection nozzle 4 for injecting fuel into the dormitory. Fuel injected from 1): (Ma vortex S (koyo-) (Mixture vaporization is promoted, J is ignited by the heat of compression, and it is combusted.) -1
There was a problem that if the atomization and vaporization of the fuel being carried out were not good, ignition would occur. ``1 fire and 118 explosions occurred, and a violent combustion occurred (all 3 degrees of shillings).
The inner ji cart tear rate is 01, and the big IEE power wave is cow-shisake (I's moon power wave is 1Φ to S with the piston and cylinder cylinder)
It will cause an attack, especially when it comes to 7/Itling sentries, etc.
It's nice, so [J isn't there. In view of this situation, the inventor of the present invention is considering a swirl combustion type diesel engine as shown in FIG. The injection nozzle 4t having a single injection port 5 as shown in FIG. ljl'j
Eight injection nozzles are installed. This injection nozzle 8 is used when a small amount of fuel is sufficient, such as when idling or at low speed.
With the main injection port 6 closed, the sub valve 9 is reciprocated. The injection nozzle 8 is surrounded by a cylindrical beam 1 to a shield 10 for preventing heat transfer from the high temperature cylinder 1 to the combustion chamber 2.
A fuel storage 11 is formed in a claw portion 1Qa for locking the snuff nose nosle 8, which forms the inner wall 2a of the nozzle 8, and faces the sub-1 snuff 1''7. This fuel lamp chamber 11 is configured to receive a portion of the fuel F sprayed in a mist form from the sub-injection lower during sifting, etc., and store it in a liquefied state (storage), and the fuel scattered around it is The mixture is vaporized by the vortex S and is immediately combusted.Then, the fuel stored in the fuel lamp chamber 11 is left unburned and is then transferred to the 13C combustion culm. Prior to the injection 124, the combustion is ignited due to the heat of compression. However, even in this proposal, if there is too much stored in lt]"t'i'I1, it is necessary to avoid vaporizing the liquefied fuel. (If the combustion rate becomes too high, some of the stored fuel 31 to be used for combustion will stagnate during the combustion process. , it is thought that the unburned content may flow out from the C combustion chamber 2 to the cylinder chamber 31 and be recycled as it is, and there is a concern that it may deteriorate the C and CO. [ff The present invention was proposed in view of the above-mentioned problems (01), and its purpose is to solve the problems described above. etc. i15-C, 1-1
In order to reduce the deterioration of C, etc., the injected fuel is vaporized slowly while controlling B1, and its combustion is slowed down to reduce G and vibration to a large degree C. A vortex combustion chamber [Embodiments of the Invention] A preferred embodiment of the present invention will be described in detail in accordance with the attached drawings. , U(2) is a vortex combustion chamber which is divided and formed in the cylinder spatula 1-'1. A fuel injection nozzle 12 is provided for injecting a fuel injection nozzle 12' to・Heat seal 1 to the mouth hole 14
10, and its combustion chamber 13a is locked to the folded annular claw portions 10a of the seals I-10. A fuel supply hole 15 is formed inside the nozzle body 13, as shown in FIG. 4, through which fuel is pumped from the combustion chamber 1 pump. Fuel is injected into the combustion chamber 2 through the nozzle 1 through the cone-shaped valve 6. Main vocal opening 6
will be communicated to. In the middle of one side 16 of the valve, there is a main 11r.
) Branch out from mouth 6! (A relatively small-diameter n1 jet 17, 18 is formed outward in the radial direction of the nozzle body 13. Inside the nozzle body 13, which is formed in the shape of J, 6 (1 valve 9 is installed. The diagonal valve 9 is mainly the main 1lr) 1 6 is required to open and close the valve 1.
Opening/closing (J
♀■ body-shaped second valve body part 9() for
,. i1 valve 9131 (not shown in the figure)
c1'ist is configured to be activated. '1st block?
Body part 9; ii, the fuel required is less and the 4-valve 9 reno 1 is faster or smaller, that is, the idling 1 (blue or low angle I +
1) It is inserted into the main 0131'6 at a depth that can hold the 1st case 1+++'col-lG in the open state. In addition, the second valve body part g5 is the valve P1・ir+i1
6. State of contact with the line in the direction of the circumference of A (゛Arrival P)
f and is configured to open and close the supply hole 1!5 following the 41 return movement of εf fj゛0. The fermentation 11 ICi ports 17 and 18 are formed on the inlet side or between these valve surfaces 16 and the second valve body portion 9b, and communicate with a gap C through which fuel is supplied from the supply hole 15 even when the +110 port 6 is open. be done. When the amount of idle-link special injection fuel is small, fuel injection is performed only from these sub-nozzles 17 and 18. In this embodiment, two sub-nozzles 17° and 18 are installed, as if the injection nozzle according to the above proposal was divided into two.
It is configured to distribute and inject one cycle's worth of fuel supplied from the supply hole 15. The fuel lamp chamber 1 is placed facing the ejection end 17a of one of the sub-injection LL 117 of the 1-injection LL 17 and 18 configured in this manner.
1 can be set. In this embodiment, the nozzle body 13
The claw portion 10a of the heat shield 10, which forms a part of the inner wall 2a of the combustion chamber 2, is folded back to lock the outer wall 13a of the combustion chamber 2. This fuel'X31 storage chamber 11 is
1 It is formed as a recess such as a bottomed hole or groove opened to face the injection L 17, and is configured to receive the atomized fuel injected from the injection L 117 and store it in a liquefied state. On the other hand, as shown in Figures 3 and 4, other sub-1j
ii [118 has its ejection end 18a facing the inner wall 2a in the downstream direction of the vortex S generated in the combustion chamber 2 (the fuel F formed and ejected is formed as a liquid film along the inner wall 2a). The configuration is such that vaporization and mixture vaporization due to the flowing vortex S are suppressed.
7a and 18a are formed to have a small diameter, in particular, to reduce the particle size of the fuel discharged from the sub 111° 1018 facing the inner wall 2a.
(The liquid film 1- is easily evaporated. In other words, the fuel is turned into an oil film and the liquid film is flowed downstream of the vortex S.
By suppressing the vaporization and mixture vaporization of the fuel 1, or if the evaporation of the fuel 21 is significantly impaired, the unburned material will be discharged after combustion, resulting in a liquid film. [By increasing the particle size and making the grain size thinner (compensating for the vaporization of combustion and balancing these (suppressing the deterioration of FIC'!9)), slow combustion is achieved. Next, the operation of the present invention will be described. As shown in Figs. Then, the second valve body part 9b opens and closes the fuel supply hole 15 to supply fuel to the gap C, and the first valve body part 9a is assembled in the open state of the main valve u6, and one recycle's worth of combustion is completed. 1 is each 1 jet LII7,
18 and is distributed according to U II) j rule. Is the mist-like fuel injected from the 17th on the 110th, which faces the 4th and 11th days, stored? i2'l'I, and is stored in a liquefied state without being subjected to combustion during injection. In the culm of the fuel tJ next cycle stored here, the fuel J: 111r, l! Prior to J4 (heated by the heat of compression and combusted to vaporize?1=, 2 flows out into -(-
/T fire burns and combustion total 2, :, +a +νmasako W
'-The fuel that is then injected is directed towards Otake.
It can prevent 1F from getting close to fire, and when idling, etc.
It is possible to suppress the i-sound in an i-J manner. At this time, the fuel is injected from the 1st injection 1'' 17 and the fuel is injected from the fuel lamp chamber 11.
Since the amount of fuel retained in the fuel is distributed to the secondary inlet 18, it will not be excessive, and the fuel will be sufficiently evaporated and almost completely combusted, resulting in ignitable white clay. It is possible to prevent the combustion process from remaining as unburned matter as much as possible, and to prevent deterioration of C1-IC, Co deposits. On the other hand, (I
! ! Immediately after injection, a wide thin l;i film 1- is formed on the inner wall 2a of the combustion chamber 2.
form. At this time, C, the direction of formation of the liquid film is the vortex S
, that is, in the same direction as the flow direction of the vortex 5(1), it is possible to suppress as much as possible the oil film from being peeled off from the inner wall 2a by the vortex S of high-temperature air. However, this does not mean that the vaporization of fuel is completely prohibited.1.
Since the sub-nozzle 18 is formed with a small diameter, the particle diameter itself is relatively small, and the liquid film is formed in a thin film over a wide area. ;゛C As mentioned above, by pre-recycling (the stored fuel is combusted in the compression stroke and the temperature inside the combustion chamber 2 is increased, the fuel that is thermally vaporized from the upper surface is burned in a large hole, and the slow combustion chamber 2 is generated. .1
I will follow Seth. Such slow combustion further suppresses the pressure rise inside the shilling chamber 3 and suppresses the bed height and vibration.
9 film and fine grains, it is possible to suppress the formation of HC, etc. In addition, from normal 1i operation to high negative direction operation, J is attached to needle valve 9.
, the main 11ij Ll G is opened and mixture vaporization by the vortex S is promoted (spark-' combustion takes place. At this time, a little fuel is injected. However, it is small compared to the total amount of 9A fuel injected, and since the combustion temperature is extremely high, there will be no adverse effect. FIG. 6 shows a modification of the above embodiment (
There is. In Fig. 5, there is a device that achieves the present invention with one sub-injection 1 (18). In addition, the claw portion 10a of the shield 10 immediately applies the fuel F injected from the sub-nozzle 18 to the heater 1!
The liquid film forms a blade surface '19 for the liquid to flow toward the inner wall 2a. That is, according to the kite 19 (inner wall 2a
A part of the nozzle is extended to the sub-nozzle 18. A fuel gauge 11 is formed on this guide surface 19 along the direction of fuel flow. This storage i-Pa 11 (,
1, place', 11) it LJ) fuel or stored 4'
After that, it will be 7 days - Hano 1.1 -. This modification also has effects similar to those of the embodiment 111. In particular, this modification 1 series has the advantage of being able to reduce the number of additions (1, -1, injection nozzle 12, heat seals 1 to 10'6), and vice 11C) 11'
Spout from 18! =J, the burner 1 immediately adheres to the inner wall 2a, which is the wall surface. nid・”
・Suppresses -C vaporization and mixture vaporization by being caught in the first flow S (and further alleviates rapid combustion. Furthermore, since the fuel 11 Sadakawa nozzle 121 adopted in the present invention In order to avoid an increase in flammability, a preliminary injection is performed before the fuel flows from the J-16 to the 116 river.It is similar to the so-called "bin 1 heu nozzle", but its function is completely different from the '4 no.
``This is what goes into Ij. Bottle 1 - U nozzle or its sub 1 +, C mouth 1 facing the upstream side of the vortex, and the main chant (''). While it has the function of improving 71 fire 1'1° without promoting vaporization-(,
The sub-nozzle 18 of the nozzle 12 employed in the present invention functions for fuel injection during idling, etc., and forms a liquid film 1 of fuel that suppresses mixture vaporization on the inner wall 2a on the downstream side of the vortex - is formed. What is not shown in FIG.
The combustion chamber side outer wall 13a of the nozzle body 13 is raised and expanded.
(It is formed. In this modification, C is sub ut:
Since the nozzle body 13' where the i +-+ 1B is formed is integrally formed with one surface of the sword, the manufacturing process is in accordance with the kite's '19. Set up (・ki,
The connection between the sub-port 18 and the guide surface 19, which requires precision, should be made precisely and smoothly. [Effects of the Invention] According to the present invention, the following excellent effects are achieved. 1-ring l+, 'l, A sub-uQ IJ is installed to inject fuel at times of low pressure, etc., and a part of the fuel injected from the sub-nozzle is stored.
A fuel lamp chamber is installed, and the fuel in the lamp chamber is transferred to the warmer in the combustion chamber during the compression stroke before fuel injection in the next cycle. +T
'UsaVruJ: Sea urchin - ゛ can prevent ignition delay as much as possible and reduce noise and vibration. 2) Also, the injection end of the sub-nozzle should face the wall of the combustion chamber, Since the fuel injected from this is formed to form a (flowing) film along the inner wall, it is possible to suppress excessive 41 gas vaporization and mixture vaporization and gradually achieve slow combustion. ?4
・Vibration can be significantly reduced. 3) Furthermore, the fuel injected from the sub-injection 1 was distributed to reduce the excessive combustion ratio of fish and shellfish caused by too much combustion in the fuel storage chamber, and the fuel was refined to the I11 range for OJ. Mortuary liquid 11A is added to the form 1i191- (to compensate for its evaporation, i additionally suppress the unburnt 5' (1 life) vl-1
Suppressing the deterioration of C, Go, etc. 11-(Saru. 4) Structure/)-Simple and easy to adopt 15 1゜4,
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side sectional view showing a conventional example, Fig. 2 is a side sectional view showing a tested embodiment, and Fig. 3 is a side sectional view of an embodiment of the present invention. 4 is an enlarged sectional view of the main part of FIG. 3, and FIGS. 5 and 6 are side sectional views of the modified embodiment. In the figure, 2 is the vortex combustion 7fZ, 2a is its inner wall, and 6 is J
ar+ + +, '11 is the fuel yJ' total, 12 is the Naruken nosuru, 17, 18 are the sub-injection 1, -1, i7a, 18a are the ends of the rock outcroppings, F (the fuel, S is the vortex) Yes. 1. “Ii1'l Applicant: Chair and Automobile Co., Ltd.
Representative Patent Attorney Nobu Kinutani Application procedure... Official document (method) % formula %] 2. Title of the invention Whirlpool combustion chamber type diesel engine 4.
Agent postal code 105 Tokyo Minato 1st Atago 1-6-7 August 30, 1988 (Delivery 1: I) 6. Drawings subject to amendment 7. Contents of amendment (1) Appropriate as shown in the attached sheet. Submit drawings. 8. List of attached drawings (12 drawings, 1 copy)

Claims (5)

[Claims] (1) A vortex combustion chamber that generates a vortex of compressed air and mixes the vortex with the injected fuel for ignition combustion. In a diesel engine, a 4-i injection nozzle is provided with a main nozzle L1 for injecting fuel into the combustion chamber, and the main nozzle is branched from the main nozzle to the bronze medal, and the main nozzle L1 is closed and opened when the load is low. In addition, a fuel lamp chamber is formed in the -V combustion chamber to receive and store a part of the fuel 1 injected from the sub-nozzle, and to flow it out while vaporizing it in the next compression step. A whirlpool combustion chamber diesel engine characterized in that the ejection end of the sub-nozzle faces the fuel lamp chamber and the inner wall of the combustion chamber in the downstream direction of the whirlpool. (2) The swirl combustion chamber type diesel engine according to claim 1, wherein the nv1 guard port is divided so as to face the fuel lamp chamber and the inner wall of the combustion chamber in the downstream direction of the swirl. . (3) , 1: The vortex combustion chamber type according to item 1 or item 2, wherein the fuel storage chamber is provided on the inner wall of the combustion chamber facing the ejection end of the sub-nozzle. diesel engine. (4) The vortex flow according to any one of claims 1 to 3, wherein the fuel storage is provided on the inner wall of the combustion chamber through which the fuel flows, which is injected from the sub-nozzle in the downstream direction of the 11th vortex flow. Combustion chamber diesel engine. (5) The swirl combustion chamber type diesel engine according to any one of claims 1 to 4, wherein the Jx fuel storage chamber is formed by a groove opened in the inner wall of the combustion chamber.