JPH07238835A - Combustion chamber and combustion method for contracted combustion chamber type internal combustion engine - Google Patents

Abstract

PURPOSE:To reduce exhaust air pollusion caused by a diesel engine and a spark ignition engine both of which have no valve operating mechanism, and concurrently enhance fuel consumption efficiency by making high speed injection to a main combustion chamber out of many various injection ports, and letting fuel injected out of a fuel injector be completely burnt out at high speed. CONSTITUTION:At appropriate timing just before a piston 2 equipped with a piston side combustion chamber 20A approaches to an upper dead center, a cover side piston 19A projected out of a cylinder cover 7 is quickly made up of a reciprocal pump, so that high speed injection is instantly made just before the aforesaid piston comes up to the upper dead center. For example, almost all the cylindrical air volume for a cross section area equivalent to the 5/6 of the outer circumference of a combustion chamber 6 is injected at high speed into the piston side combustion chamber 20A where a contracted shape 9A having a cross sectional area equivalent to the 1/6 of the aforesaid outer circumference acts as an entrance to the piston side combustion chamber. Fuel which is injected out of a fuel injector 10 provided for the cover side piston 19A is burnt out while being agitated and mixed at high speedy. Besides, the piston 2 is provided with a scavenge guide section 12 and an exhaust guide section 13, so that the cylinder cover 7 is also provided with a scavenge guide projected section 23 and an exhaust guide projected section 24 which are engaged with the aforesaid guide sections respectively. This constitution thereby allows exhaust air pollusion to be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-cycle crank type internal combustion engine without a valve mechanism, and more particularly to a combustion chamber and combustion method for a compact combustion chamber internal combustion engine.

[0002]

2. Description of the Related Art A two-cycle internal combustion engine without a valve mechanism is mainly used as a small spark ignition internal combustion engine.

[0003]

A two-cycle internal combustion engine without a valve operating mechanism has the drawback of poor scavenging efficiency and a large amount of fuel waste. An object of the present invention is to provide a compact combustion chamber internal combustion engine adopting the method.

[0004]

In order to minimize the production of nitrogen oxides by making reverse use of the increase in residual gas, the present invention provides a small combustion chamber in the center where a column of residual gas is formed by centrifugal force. As an additional main combustion chamber, the agitation / mixing combustion speed is dramatically increased to complete combustion close to the stoichiometric air-fuel ratio complete combustion with a margin, so it is rapidly divided into two large and small combustion chamber reciprocating pumps near top dead center. To do. That is, two large and small reciprocating pumps are suddenly constructed at a suitable time immediately before the piston 2 approaches the top dead center, and the combustion chamber is rapidly divided to instantly reach the top dead center, for example, 7 minutes of the outer circumference of the combustion chamber 6. The fuel contained in the cover-side main combustion chamber 21A is injected at high speed into almost all of the air of 6-section area into the cover-side main combustion chamber 21A having the reduced shape 9A of 1/7 cross-section due to the difference in compression ratio. From the ideal diesel combustion method to the ideal spark ignition lean combustion method, for example, the gas or liquid fuel injected from the injector 10 is super-high-speed agitated mixed compression ignition combustion by ultra-high-speed air injected in multiple directions from multiple nozzles. Offers.

[0005]

[Operation] The present invention is designed to rapidly reciprocate two large and small combustion chamber reciprocating pumps just before the top dead center and quickly eliminate them after the top dead center. The injection-stirring mixed combustion, the rapid expansion stirring-mixing finishing combustion, and the three-stage combustion are instantaneously completed. As shown in Fig. 4, the piston side piston 22A and the cover side combustion chamber 21 of the main combustion chamber small reciprocating pump are finished.
In addition to being able to form a large number of various grooves that transform into nozzles on the inner and outer circumferences of each A, the difference in the compression ratio of the two pumps is the maximum, so the air injection speed is Also becomes the maximum at top dead center, the mixing speed becomes maximum, and the air injection direction and the nozzle position change momentarily, so the combustion speed also becomes maximum instantaneously, and the reverse injection combustion also becomes maximum instantaneously due to deflagration. Are selected and injected sequentially from the incomplete combustion gas with a large specific gravity collected on the outer periphery of the combustion chamber by centrifugal force, and the complete combustion end gas with a low specific gravity remains in the center of the combustion chamber. Burning,
Furthermore, when the reciprocating pump is suddenly removed, rapid expansion, stirring, mixing, and finishing combustion occur, so the combustion efficiency increases dramatically, and the more residual gas there is, the less nitrogen oxide is produced. It has a great effect that the combustion method can be completed with sufficient time.

When the present invention is carried out as a spark ignition lean burn internal combustion engine, it is almost the same as the above diesel combustion method, but the air-fuel ratio control for spark ignition is required. That is, the fuel injection amount control, the fuel injection timing control and the scavenging pressure control are required, the first stage combustion changes from the easy-to-ignite air-fuel ratio medium speed agitated mixed spark ignition combustion, and the specific gravity of the second stage combustion increases and Incomplete deflagration combustion gas selection Reverse injection agitation mixed combustion, which is much faster than the reverse injection agitation mixed combustion rate of the diesel combustion method described above, and rapid expansion agitation mixed finish of three-stage combustion It becomes combustion. Therefore, as compared with the normal combustion method, the stirring and mixing combustion speed becomes faster as the number of nozzles increases, and a stirring and mixing combustion speed that exceeds several times is also possible, so there is no unburned gas or incomplete combustion gas. The effect that can be achieved is large, the air-fuel ratio control is easy because the main combustion chamber is small, and there is a great effect that it is possible to easily control from near-theoretical air-fuel ratio combustion control to lean combustion control, and the effect of preventing abnormal combustion is also great.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the first embodiment of FIG. 1, a combustion chamber of a two-cycle compression type combustion chamber compression ignition engine without a valve operating mechanism is shown. A scavenging hole group 4, a supply hole group 5 and an exhaust hole group 8 which are opened and closed by a piston 2 are provided below the sliding surface 3 of the cylinder 1, and scavenging air is provided on the scavenging hole group 4 side of the head of the piston 2. Exhaust hole group 8 provided with scavenging guide portion 12 for filling in a loop shape
An exhaust guide portion 13 is provided on the side according to the application, a piston side combustion chamber 20A having a reduced shape 9A having a shape close to a cylinder is recessed at the center of the head, and the piston 2 is provided on the cylinder cover 7.
The scavenging guide convex portion 23 that fits into the scavenging guide portion 12 and the exhaust guide convex portion 24 that fits into the exhaust guide portion 13 are also projected, and the cover side piston 19A having the fuel injector 10 near the center is provided. The piston 9 is provided with a contraction 9A of the piston-side combustion chamber 20A and the reciprocating pump provided on the piston 2 at a suitable time just before the piston reaches the top dead center. Almost all of the air with a 5/6 cross-sectional area of the outer periphery of 6 was injected at high speed into the piston-side combustion chamber 20A with the contracted 9A having a 1/6 cross-sectional area as the inlet, and was provided to the cover-side piston 19A. The gas or liquid fuel injected from the fuel injector 10 is burned with high speed stirring and mixing.

Referring to FIG. 2, the cover side piston 19A
19B, 19C and 19D are shown. Since there are so many examples, they are all roughly classified and included.
In the combustion method using the contracted combustion chamber, not only the compression ignition engine to the spark ignition engine can be obtained in a nearly ideal combustion method, but also various liquid gas fuels that can be injected from the fuel injector 10 can be ideally burned. It was taken. 1
9A is used in the first embodiment and is a basic type that can be used in various applications by changing the thickness and gap. 19B has a high-speed airflow injection groove 16 on the outer surface of 19A. The number, size and depth of the grooves can be changed to suit the application. 19C has a rotary airflow injection groove 17 on the outer surface of 19A, and can be used by changing the tilt angle, number, size and depth of the grooves to obtain the rotary airflow. 19D has a stirring air flow injection groove 18 on the outer surface of 19A, and it is suitable for applications where agitation is mainly provided by installing an appropriate number of grooves with different injection directions.

Referring to FIG. 3, piston side combustion chamber 20A
・ 20B ・ 20C ・ 20D and reduced form 9A ・ 9B ・ 9C ・
9D is shown. Since the combustion chamber on the piston side changes subtly depending on the application, it cannot be roughly classified into all parts, so all parts of the same shape are included. Since there are many examples of reduced form, it is roughly divided into all.
In the combustion method using the contracted combustion chamber, not only the compression ignition engine to the spark ignition engine can be obtained in a nearly ideal combustion method, but also various liquid gas fuels that can be injected from the fuel injector 10 can be ideally burned. It was taken. 9
A is used in the first embodiment and is a basic type that can be used in various sizes and gaps. 9B has a high-speed airflow injection groove 16 on the inner surface of 9A, and the number, size and depth of the grooves can be changed to suit the application. 9C has a rotary airflow injection groove 17 provided on the inner surface of 9A, and can be used by changing the tilt angle, number, size and depth of the grooves to obtain the rotary airflow. 9D has a stirring air flow injection groove 18 on the inner surface of 9A, and it is compatible with applications where the main purpose is agitation by adding grooves with different injection directions. Also, reduced form 9A, 9B, 9
C ・ 9D and cover side pistons 19A ・ 19B ・ 19C ・
By changing the combination with 19D in various ways, it can be used for more purposes.

Referring to the second embodiment of FIG.
7 is almost the same as that of the first embodiment of FIG. 7, except that the piston side combustion chamber 20A having the reduced shape 9A of the first embodiment is moved to the cylinder cover side to cover side combustion chamber 21A having the reduced shape 9A. At the same time, the cover side piston 19A has also moved to the piston 2 side to become the piston side piston 22A. Therefore, the piston side piston 22A is the piston 2
At a time close to the top dead center, the reciprocating pump and the reduced shape 9A of the cover-side combustion chamber 21A recessed in the cylinder cover 7 are suddenly configured to instantly reach the top dead center, for example, in the combustion chamber 6. Using the difference in compression ratio, almost all of the air with a 6/7 cross-sectional area on the outer periphery is injected at high speed into the cover-side combustion chamber 21A having the reduced shape 9A with a 1/7 cross-sectional area, and the cover-side combustion is performed. Room 21A
All the gaseous liquid fuel injected from the fuel injector 10 equipped in is to be powerfully burned by ultra-high speed stirring and mixing.

Referring to the third embodiment of FIG.
Although it is almost the same as the second embodiment of No. 0, the difference is that the cover side combustion chamber 21A has a glow plug 15 in addition to the fuel injector 10.
It is equipped with. This glow plug 15 is also equipped according to the application. The common features of the combustion chamber and combustion method of the internal combustion engine of the reduced combustion chamber are that the main combustion chamber 20 or 21 is attached to the central axis of the combustion chamber 6 which becomes the pillar of residual gas in the internal combustion engine with swirl.
As a result, the main combustion chamber is always left with residual gas, fresh air is supplied only during combustion near the compression top dead center, and the agitation is very good. It has the least combustion method, and has a great effect on reducing pollution. In addition, the disadvantage of the 2-cycle engine without a valve train is that the fuel efficiency is poor, but it can be completely resolved by using a compact combustion chamber, so the advantages are given below.

1. The reduction of kinetic energy is as small as one half of that of a 4-cycle engine, and the compression ratio is easy to increase, so the thermal efficiency can be dramatically increased. 2. Since the number of explosions is twice, it is possible to reduce the size, weight, output, vibration and noise. 3. Since the structure is simple, the manufacturing cost is low even for a V8 cylinder. 4. When implemented as a diesel engine for automobiles, vibration and noise can be made comparable to ordinary gasoline vehicles because the cross-sectional area that receives the maximum combustion pressure is small. 5. When implemented as a diesel engine for outboard motors, the output per weight can be about double that of a 4-cycle diesel engine. 6. Since the amount of residual gas is large and the stirring and mixing is dramatically improved, it is possible to achieve a combustion method that is easy to reduce and has low pollution, which is close to the theoretical air-fuel ratio low temperature complete combustion. 7. Since the maximum heat load is isolated on the main combustion chamber side, the heat load on the machine part is reduced and the engine life is extended. 8. The isolated main combustion chamber is always a residual gas and almost free of oxygen, and strong agitating and mixing with fresh air is limited to near top dead center, so that any liquid gas fuel including hydrogen fuel is completely burned in the shortest time. You can finish.

Referring to the fourth embodiment of FIG.
The third embodiment is almost the same as the first embodiment except that the glow plug 15 is provided in the cover side combustion chamber 21A together with the fuel injector 10.
I replaced the glow plug 15 with the one equipped with the spark plug 14. This spark plug 14 is also provided according to the application, but when the compact combustion chamber internal combustion engine is implemented as a spark ignition engine, it is basically the same as the diesel combustion method, but spark ignition is performed. Therefore, air-fuel ratio control is required. That is, fuel injection amount control, fuel injection timing control, and scavenging pressure control are required. First 1
In the combustion in the first stage, spark-ignition combustion is performed with an air-fuel ratio and a stirring / mixing speed that are easy to ignite, but the fuel injection is preheated to the extent that early fuel injection is performed in the cover side combustion chamber 21A of the main combustion chamber, resulting in oxygen-free combustion. Because it is close, you do not have to worry about abnormal combustion.
In the second-stage back-injection combustion, the high-speed air injected from a large number of nozzles explodes at a high speed while efficiently stirring, mixing, and rotating, causing the combustion pressure to rise rapidly, resulting in reverse-injection combustion from a number of both-side nozzles into the combustion chamber 6. However, since rotational movement is also added to the stirring and mixing, selective inversion combustion is performed sequentially from the incomplete combustion gas with a large specific gravity gathered around the outer periphery of the main combustion chamber. In this case, the reverse injection speed will dramatically increase the combustion pressure, and as a result, the combustion speed will be extremely high, and complete combustion will be completed instantly with the fresh air that remains in the eyes. In the third stage finish combustion, when the contracted 9A reciprocating pump in the main combustion chamber is suddenly eliminated, and when the combustion gas is rapidly expanded in the combustion chamber 6 side, agitation mixed combustion is performed, and all of them are instantaneous near the top dead center. Is to be completed.

Referring to FIG. 7, the piston 22 on the piston side
A ・ 22B ・ 22C ・ 22D ・ 22a ・ 22 ・ b ・ 22
c · 22d is shown. Since there are so many examples, they are all roughly classified. In the combustion method using the compact combustion chamber, in addition to obtaining a combustion method close to ideal from the compression ignition engine to the spark ignition engine, the fuel injector 10
It has been adopted so that it can ideally burn any liquid gas fuel that can be injected more. 22A to 22d are all used in the second to fourth embodiments,
22A is a basic type that can be used for various purposes by changing the thickness and gap. 22B has a high-speed airflow injection groove 16 recessed on the outer surface of 22A. The number, size and depth of the grooves can be changed to suit the application. 22C has a rotary airflow injection groove 17 recessed on the outer surface of 22A. The angle of inclination, number, size, and depth of the grooves to obtain rotary airflow can be changed to suit the application. 22D has a stirring air flow injection groove 18 recessed on the outer surface of 22A, and it is suitable for a main purpose of stirring with a proper number of grooves with different injection directions. 22a is an extension of the combustion chamber inside 22A, and the shape and depth are adapted to the application. 22b is an extension of the combustion chamber inside 22B, the shape and depth of which match the application. The 22c is an extension of the combustion chamber inside the 22C, and the shape and depth are adapted to the application. The 22d is an extension of the combustion chamber inside the 22D, and the shape and depth are adapted to the application.

Referring to FIG. 8, the cover side combustion chamber 21A
21B, 21C and 21D are shown. Since this example is also very numerous, it is categorized roughly and includes all examples. In the combustion method using the contracted combustion chamber, not only the compression ignition engine to the spark ignition engine can be obtained in a nearly ideal combustion method, but also various liquid gas fuels that can be injected from the fuel injector 10 can be ideally burned. It was taken. All of 21A to 21D are used in the 2nd to 4th embodiments, and the 21A is a basic type that can be used in various sizes and gaps. 21B has a high-speed airflow injection groove 16 on the inner surface of 21A, and the number, size, and depth of the grooves can be changed to suit the application. 21C is 21
A rotary airflow injection groove 17 is recessed on the inner surface of A, and the inclination angle and number of grooves for obtaining the rotary airflow can be changed to suit the application. 21D has a stirring air flow injection groove 18 recessed on the inner surface of 21A, and it is suitable for applications where stirring is the main purpose by installing an appropriate number of grooves with different injection directions. Also, the cover side combustion chambers 21A, 21B, 21C,
21D and piston side piston 22A. 22B ・ 22C ・
By combining various combinations of 22D, 22a, 22b, 22c, and 22d, various applications can be supported.

[0016]

The present invention uses two large and small combustion chambers as a reciprocating pump. For example, the compression ratio of the reciprocating pump having a 6/7 cross section of the outer periphery of the larger combustion chamber 6 is maximized. The compression ratio of the cover-side combustion chamber 21 having the smaller one-seventh cross-sectional area of the reduced shape 9 is set to 20: 1, and the piston-side piston 22 and the cover-side combustion chamber are timely just before the piston 2 approaches the top dead center. When the reciprocating pump and the reduced form 9 of 21 are suddenly constructed, almost all the air of the reciprocating pump of the 6/7 cross section has the reduced form 9 of the 1/7 cross section at the cover side combustion at the instant to the top dead center. Move to room 21. The agitation and mixing combustion speed in the cover-side combustion chamber 21 of the main combustion chamber becomes faster as the number of air injection ports increases and as the injection speed increases. That is, according to the present invention, in addition to the fact that a wide variety of grooves that transform into injection holes can be formed in the outer circumference of the piston side piston 22 and the inner circumference of the contracted shape 9 respectively, and that the air injection speed can also be extremely high, There is a great effect of approaching the complete combustion completion rate of several times to several times the complete combustion completion rate of the diesel combustion method of
It has a great effect on reducing pollution and increasing fuel efficiency.

A normal two-cycle spark ignition engine without a valve operating mechanism has a drawback that a high compression ratio cannot be achieved due to blow-through of unburned air-fuel mixture or abnormal combustion, and intake air is greatly throttled to adjust the output. There was a fatal drawback that hindered the increase in fuel efficiency. Therefore, according to the present invention, the cover side combustion chamber 21 of the main combustion chamber is made small and isolated, and the fuel injector 10 and the spark plug 14 are provided so that no unburned air-fuel mixture is blown by the isolated small main combustion chamber. The high compression ratio is facilitated by restricting the intake air, that is, the fluctuation range of the supercharging pressure is minimized to increase the fuel efficiency. That is, the combustion method is almost the same as the diesel combustion method of 0016 above, but air-fuel ratio control for spark ignition is added. The lean combustion of this invention has a large amount of residual gas, and the rate of completion of complete combustion of agitation and mixing is dramatically improved. Since the combustion becomes lean including residual gas, it also includes combustion close to the end of the theoretical air-fuel ratio low temperature complete combustion. ， It has a great effect to obtain a 2-cycle spark ignition engine without valve mechanism, which has very little nitrogen oxides, low pollution, easy reduction, very good fuel efficiency and simple structure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a fourth embodiment of the cover side piston 19 of the present invention.
It is a front view which shows an example.

FIG. 3 is a partial cross-sectional view showing four examples of embodiments of the piston combustion chamber 20 of the present invention.

FIG. 4 is a sectional view showing a second embodiment of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a fourth embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing eight examples of embodiments of the piston side piston 22 of the present invention.

FIG. 8 is a partial cross-sectional view showing four examples of embodiments of the cover-side combustion chamber 21 of the present invention.

[Explanation of symbols]

When there are multiple examples for the same part, the part is represented by a number and is marked with AB, ab ,. 1: Cylinder 2: Piston 3: Sliding surface 4:
Scavenging hole group 5: Air supply hole group 6: Combustion chamber 7: Cylinder cover 8: Exhaust hole group 9: Reduced shape 10: Fuel injector 12: Scavenging guide part 13: Exhaust guide part 14: Fireplug 15: Glow plug 16 : High-speed airflow injection groove 17: Rotating airflow injection groove 18: Agitation airflow injection groove 19: Cover side piston 20: Piston side combustion chamber 21: Cover side combustion chamber 22: Piston side piston 23: Scavenging guide convex part 24: Exhaust guide convex Department

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location F02F 3/28 B F02M 61/18 320 Z (72) Inventor Yukinaga Tanigawa Enami, Okayama City, Okayama Prefecture 428-35

Claims (18)

[Claims] 1. A piston-side combustion chamber (20) having a reduced shape (9A).
Just before the piston (2) having A) approaches the top dead center, the cover side piston (19A) protruding from the cylinder cover (7) and the reciprocating pump are suddenly formed at an appropriate time, and the combustion is instantaneously performed until the top dead center. Almost all of the air having a 5/6 cross-sectional area on the outer circumference of the chamber (6) is injected at high speed into the piston-side combustion chamber (20A) having the contraction (9A) with a 1/6 cross-sectional area as the inlet, Fuel injector (1 equipped to piston (19A)
In a compact combustion chamber internal combustion engine in which the fuel injected from 0) is subjected to high-speed agitation mixed combustion, a piston (2) is provided with a scavenging guide part (12) and an exhaust guide part (13), and a cylinder cover (7) is provided on each of them. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine, comprising a scavenging guide protrusion (23) and an exhaust guide protrusion (24) which are fitted to each other. 2. The reduced combustion chamber internal combustion engine according to claim 1, wherein a high-speed airflow injection groove (16) is provided on the outer surface of the cover-side piston (19A) to form a cover-side piston (19B). Engine combustion chamber and combustion method. 3. The reduced combustion chamber internal combustion engine according to claim 1, wherein the cover side piston (19A) is provided with a rotary air flow injection groove (17) on an outer surface thereof to form a cover side piston (19C). Engine combustion chamber and combustion method. 4. The reduced combustion chamber internal combustion engine according to claim 1, wherein the cover side piston (19A) is provided with a stirring air flow injection groove (18) on an outer surface thereof to form a cover side piston (19D). Engine combustion chamber and combustion method. 5. A high-speed airflow injection groove (16) is provided on the inner surface of the contracted shape (9A) at the inlet of the piston side combustion chamber (20A) to form the contracted shape (9B) and the piston side combustion chamber (20B). The combustion chamber and combustion method for a compact combustion chamber internal combustion engine according to claim 1, wherein 6. A piston (9C) and a piston side combustion chamber (20C) are provided with a rotary air flow injection groove (17) on the inner surface of the inlet (9A) of the piston side combustion chamber (20A). The combustion chamber and combustion method for a compact combustion chamber internal combustion engine according to claim 1, wherein 7. A piston (9D) and a piston side combustion chamber (20D) are provided with a stirring air flow injection groove (18) on the inner surface of the inlet (9A) of the piston side combustion chamber (20A). The combustion chamber and combustion method for a compact combustion chamber internal combustion engine according to claim 1, wherein 8. The contracted (9A) piston-side combustion chamber (20A) of claim 1 is moved to the cylinder cover side to be contracted (9A).
(A) and the cover side combustion chamber (21A), the piston side combustion chamber is also changed, and the piston side piston (22
As A), when the piston (2) is close to the top dead center, the reduced shape (9A) of the cover-side combustion chamber (21A) and the reciprocating pump are suddenly constructed at an appropriate time instantly until the top dead center, for example, the combustion chamber. High-speed injection of almost all of the air with a 6/7 cross-sectional area in (6) into the cover-side combustion chamber (21A) having a reduced shape (9A) with a 1/7 cross-sectional area due to the difference in compression ratio. In the internal combustion engine of the compact combustion chamber in which the fuel injected from the fuel injector (10) provided in the cover-side combustion chamber (21A) is subjected to high-speed agitation and mixing combustion, the scavenging guide part (12) is attached to the piston (2). )
And a cylinder cover (7) provided with an exhaust guide part (13)
A combustion chamber and combustion method for a compact combustion chamber internal combustion engine, comprising: a scavenging guide convex portion (23) and an exhaust guide convex portion (24) which are fitted to each other. 9. A reduced form (9A) of the cover side combustion chamber (21A) and a reciprocating pump are suddenly constructed at a suitable time immediately before the piston (2) having the piston side piston (22A) approaches the top dead center. At the instant of reaching the dead point, for example, the cover side having a reduced shape (9A) of 1/7 cross section due to the difference in compression ratio of almost all the air of 6/7 cross section of the outer circumference in the combustion chamber (6). High-speed injection into the combustion chamber (21A), and the cover-side combustion chamber (21A)
In a reduced-combustion-combustion internal combustion engine in which fuel injected from a fuel injector (10) equipped with a glow plug (15) in (A) is agitated and mixed and burned, a scavenging guide part (12) is attached to a piston (2). And an exhaust guide portion (13) and fitted to the cylinder cover (7) respectively, the scavenging guide convex portion (2
3) and the exhaust guide convex part (24) are provided, The combustion chamber and combustion method of a compact combustion chamber internal combustion engine characterized by the above-mentioned. 10. A reduced form (9A) of the cover side combustion chamber (21A) and a reciprocating pump are suddenly constructed at a suitable time immediately before the piston (2) having the piston side piston (22A) approaches the top dead center. At the instant until the dead point, for example, a cover side having a reduced shape (9A) with a 1/7 cross section due to the difference in compression ratio of an appropriate amount of air with a 6/7 cross section in the outer periphery of the combustion chamber (6). High-speed injection into the combustion chamber (21A), and the cover-side combustion chamber (21A)
A) A fuel injector (1) equipped with a spark plug (14)
In a compact combustion chamber internal combustion engine in which fuel injected from (0) is stirred and burned at high speed, a piston (2) is provided with a scavenging guide part (12) and an exhaust guide part (13) and a cylinder cover (7) is provided. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine, comprising a scavenging guide convex portion (23) and an exhaust guide convex portion (24) which are fitted to each other. 11. Top deadening by suddenly configuring a reduced shape (9A) of a cover side combustion chamber (21A) and a reciprocating pump just before a piston (2) having a piston side piston (22A) approaches top dead center. At an instant up to the point, for example, an appropriate amount of air with a cross-sectional area of 6/7 of the outer circumference in the combustion chamber (6) is adjusted to 7 by the difference in compression ratio.
High-speed injection into the cover-side combustion chamber (21A) having a reduced cross-sectional area (9A) and the cover-side combustion chamber (21A).
In a compact combustion chamber internal combustion engine in which fuel injected from a fuel injector (10) equipped with a plurality of spark plugs (14) in (A) is subjected to high-speed agitation mixed combustion, a scavenging guide part () is attached to a piston (2). 12) and the exhaust guide part (13) are provided and fitted to the cylinder cover (7), respectively.
3) and the exhaust guide convex part (24) are provided, The combustion chamber and combustion method of a compact combustion chamber internal combustion engine characterized by the above-mentioned. 12. A piston (2) having a piston (22A) on the piston side (2A) near the top dead center and at a suitable time, a reduced form (9A) of the cover side combustion chamber (21A) and a reciprocating pump are suddenly constructed to top dead. At the instant to the point, for example, almost all of the air in the outer circumference of the combustion chamber (6) having a 6/7 cross section has a cover side combustion having a reduced shape (7A) with a 1/7 cross section due to the difference in compression ratio. High-speed injection into the chamber (21A), and the cover side combustion chamber (21
In a compact combustion chamber internal combustion engine in which fuel injected from a fuel injector (10) provided in A) is agitated and mixed and burned at high speed, a scavenging guide part (12) and an exhaust guide part (13) are provided in a piston (2). ) Are provided and fitted to the cylinder cover (7) respectively, the scavenging guide protrusion (23) and the exhaust guide protrusion (2)
(4), which is a piston engine (22a) for expanding the combustion chamber inside the piston (22A) to promote the vaporization of fuel according to the application Combustion chamber and combustion method. 13. The piston-side piston (22A) or (22a) is provided with a high-speed airflow injection groove (16) on the outer surface thereof to form the piston-side piston (22B) or (22b). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12. 14. The piston side piston (22A) or (22a) is provided with a rotary air flow injection groove (17) on the outer surface thereof to form a piston side piston (22C) or (22c). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12. 15. The piston side piston (22A) or (22a) is provided with a stirring air flow injection groove (18) on the outer surface thereof to form a piston side piston (22D) or (22d). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12. 16. The cover-side combustion chamber (21B) is characterized in that a high-speed airflow injection groove (16) is provided on an inner surface of a contracted shape (9A) of the cover-side combustion chamber (21A) to form a cover-side combustion chamber (21B). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12. 17. The cover-side combustion chamber (21C) is characterized in that the cover-side combustion chamber (21A) is provided with a rotary airflow injection groove (17) on the inner surface of the reduced shape (9A). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12. 18. The cover-side combustion chamber (21D) is provided with an agitated air flow injection groove (18) on the inner surface of a reduced shape (9A) of the cover-side combustion chamber (21A). 13. A combustion chamber and a combustion method for a compact combustion chamber internal combustion engine according to claim 12.