JPH0619800Y2 - Engine valves without the number of valves - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] In the present invention, the valve hole for the auxiliary intake passage and the opening of the through hole to the main combustion chamber are moved by one valve per cycle according to the piston stroke. It relates to engine valves without the number of valves that can be used.

[Conventional technology]

Conventionally, a valve that can periodically change the opening degree of a through hole that connects the main combustion chamber and the auxiliary combustion chamber has been designed to change only the through hole to change the penetration force of the air-fuel mixture. (Japanese Patent Application No. 47-19343 filed by Honda Motor Co., Ltd.). However, the present invention is a macroscopic adjustment method in which the through hole is changed by hydraulic pressure according to the load rotation speed. Further, it has been common sense that a plurality of motion transmission drive systems are conventionally required for adjusting a plurality of passages. Therefore, if the auxiliary combustion method of the gasoline engine is to have a function to adjust the opening degree of the through hole between the combustion chambers, one valve will be required for each location, and the mechanism will be complicated and prone to failure. A flaw was considered.

Furthermore, the problem as the performance limit of the conventional sub-combustion system is extracted from Japanese Patent Application No. 47-19343 and summarized below.The following is the limit that occurs because the through-hole opening between the combustion chambers is constant. Even if an attempt is made to improve the scavenging property and the ignitability, it becomes difficult because there are mutual restrictions between the combustion chambers. Because there is a mutual restriction relationship between the size of the combustion capacity of the auxiliary combustion chamber and the opening degree of the through-hole, for example, the larger the capacity of the auxiliary combustion chamber, the greater the amount of burnt gas left in the chamber during the ignition stroke. That is, unless the interior of the auxiliary combustion chamber is carefully scavenged during the intake stroke, the ignition performance due to the spark plug deteriorates. Therefore, the opening degree between the combustion chambers must be increased. However, as the through-hole opening is increased, not only does the excessive inflow from the main combustion chamber generate a swirl flow in the compression stroke of the high load region to deteriorate the ignitability, but it also distorts the proper air-fuel ratio in the auxiliary combustion chamber. Will end up. On the contrary, as the combustion capacity of the sub-combustion chamber becomes smaller, the rate of inflow from the main combustion chamber in the compression stroke in the high load region also becomes higher, and the violent swirl deteriorates the ignitability of the spark plug in the sub-combustion chamber. . For this reason, the degree of inter-combustion holes between the combustion chambers must be made small according to the chamber volume, but as the perforation opening degree is made smaller, the scavenging property lowering phenomenon appears in correlation.

[Problems to be solved by the invention]

It is understood that such a constraint is unshielded because the ideal opening degree of the opening between the piston strokes is different in each stroke. Further, even if the present invention is not used as a secondary combustion system and is considered as a simple valve, a valve that can also function as a plurality of valves is desirable from the viewpoints of reliability of equipment, maintenance inspection, and cost reduction.

[Means for solving problems]

The present invention is used in the conventional auxiliary combustion system by the opening of the through hole communicating with the main combustion chamber and the engine valve that changes the opening of the auxiliary intake passage in accordance with the piston stroke, as in the conventional valve. Also, the present invention can be applied to a valve that burns in a conventional main combustion chamber, and the present invention will be described in detail with reference to the drawings.

A valve hole is formed in the valve 1 for opening and closing the opening of the auxiliary intake passage A, and a valve B is also used to variably adjust the opening of the through hole B to the through hole B formed by a portion to be moved such as the body 2. The valve 1 is provided with a hole opening adjusting mechanism, and a mechanism for adjusting the through hole opening adjusting mechanism and the auxiliary intake passage A valve hole according to the piston stroke.

[Action]

When the present invention is applied to the auxiliary combustion chamber integrated valve in which the auxiliary combustion chamber is formed in the valve 1, the inter-combustion chamber interval is maintained during any of the intake stroke, the combustion stroke, the compression stroke, and the exhaust stroke of the piston stroke. The valve 1 of the present invention, which can freely adjust the opening degree of the through hole B of the present invention, has a through hole opening adjusting function capable of temporarily blocking the through hole B between the main combustion chamber and the auxiliary combustion chamber. . In addition, the single valve 1 simultaneously has a function of causing the valve hole to open to supply the air-fuel mixture from the auxiliary intake passage A to the auxiliary combustion chamber, which is required in the intake stroke. Further, various methods of the through hole opening degree adjusting mechanism of the valve 1 will be described with reference to the embodiments, but there is no restriction on the strokes in any case in each piston stroke, and each stroke is aimed independently. The through-hole opening between the combustion chambers can be variably adjusted according to the engine characteristics. Further, if the valve 1 of the present invention is supplied to the main combustion chamber in the intake stroke to supply the air-fuel mixture and is kept shut off during the other piston strokes, the valve 1 for the main combustion chamber has a through hole. The through hole opening adjustment mechanism of B can be fully utilized.

〔Example〕

1 and 2 are partial cross-sectional perspective views showing a first embodiment and a second embodiment of the present invention, respectively. FIGS. 1 to 7 show various specifications and operating states of the through hole opening adjusting mechanism of the through hole B provided in the valve 1 of the present invention.
What is common to all figures is that at least two or more plate parts are required for the through hole A to operate with an adjusting function. At least one hole is required on the body 2 side of the two plate portions of the inner plate portion C and the outer plate portion D, which are the plate portions, and the shape, size, and number of the holes on the valve 1 side are required. , It may be in position. For example, the opening and closing and adjustment of the auxiliary intake passage A and the through hole B may be performed by a single hole. Further, in particular, the valve 1 in which a large hole is formed and only a part of the hole is left to make it look like a projection, and the through hole is blocked by the projection part may be used. Some are hard to call holes because they are sensuous. Therefore, the valve 1 may be formed in any manner as long as the through hole B can be adjusted without being determined as a hole.
However, it is necessary to form holes in any shape, size, number and position of the body 2 or the like to be moved. By the way, in FIG. 1, a hole is provided at one place on the outer plate D, but if either plate becomes the valve 1 and rotates according to the position of the hole, the through hole B is temporarily opened. To shut off. FIG. 2 shows the inner and outer plate parts C and D.
Since the hole formed in is formed so as to include the center line,
The opening is adjusted while the through holes are always communicated.

FIG. 3, FIG. 4 and FIG. 5 are partial sectional views showing the operating state of the third embodiment of the present invention. The opening state of the through-hole opening adjustment mechanism when the valve 1 moves up and down, which is the movement of the conventional valve, is shown. FIG. 3 shows the state of the intake stroke. 4 and 5, while closing the auxiliary intake passage A,
By changing the opening of the through hole B, it can be adjusted during any of the compression stroke, combustion stroke, and exhaust stroke according to the desired engine characteristics.

6 and 7 are partial perspective views showing a fourth embodiment and a fifth embodiment of the present invention, respectively. FIG. 6 is a temporary shutoff type similar to FIG. 1, and FIG. 7 is a continuous communication type similar to FIG. 2, but different features are the penetration force of the air-fuel mixture depending on the depth (length) of the holes. It is intended to change the penetration force of the flame, and the depth of the hole corresponds to the size of the hole in FIGS. 1 and 2.
The greater the depth, the weaker the force of the fluid, with the same effect as the smaller pore size. Further, in the case of these two drawings, the valve 1 in which either plate portion rotates may be used.

8, 9, 10 and 11 show the valve 1 of the present invention.
The partial combustion perspective view which showed the subcombustion system which made the subcombustion chamber internal in it among 6th Example, 7th Example, 8th Example, and 9th Example, respectively. In FIG. 8, the part to be moved having the auxiliary combustion chamber formed inside the valve 1 is fitted, and in FIG. 9, the valve 1 itself forms the auxiliary combustion chamber inside. 10th
In the drawing, the part to be moved is fitted inside the valve 1, but the valve 1 and the part to be moved together form a sub combustion chamber in the valve 1. Also, as shown in FIG. 9, plug 3
When the valve is placed in either side, when it is inserted into the valve 1, the plug 3 also moves when the valve 1 rotates or reverses. Further, when the plug 3 is attached to the body 2 as shown in FIGS. 9 and 11, the hole for connecting the plug 3 and the auxiliary combustion chamber may also be used as the auxiliary intake passage A valve hole.
You may provide each separately. Further, the structure is the same as that of FIGS. 8 and 11, but there is only a slight difference in the through hole opening degree adjusting mechanism. The valve 1 according to the present invention shown in FIGS. 8 to 11 uses the through hole opening adjusting method of the first embodiment, but other methods may be used. The auxiliary combustion system according to the embodiment shown in FIGS.
It can also be used in diesel engines with injection nozzles instead of. In this case, by using the auxiliary intake passage A, not only a good performance internal combustion engine can be obtained, but also the through hole B
By positively adjusting the opening degree adjusting mechanism of, for example, during the intake stroke, air or air-fuel mixture is flowed from the auxiliary intake passage A to scavenge the auxiliary combustion chamber, or the opening of the through hole B is maximized. The air or air-fuel mixture in the main combustion chamber is positively flowed to accelerate the combustion speed in the main combustion chamber, or to adjust to the best through-hole opening when using the injection nozzle so that complete combustion is achieved. I can go.

FIG. 12 is a partial sectional perspective view showing a tenth embodiment of the present invention. It is used as the valve 1 for the main combustion chamber.
Although this drawing also uses the through hole opening adjustment mechanism of the first embodiment,
Other methods may be used. Using the valve 1 as shown in the figure,
The penetrating force is obviously stronger than that of the conventional valve, and the pressure wave generated by the opening / closing movement of the valve 1 is also likely to interfere and becomes stronger.

By the way, when the valve 1 of the present invention moves up and down like a conventional valve, power can be transmitted from the camshaft to the valve 1 through the rocker arm, and when rotating or reversing, the power of the camshaft or the like can be transmitted. The valve 1 may be moved from the transmission source through a mechanism such as a gear or a timing belt.

In addition, if added as "action", the through hole opening degree adjusting mechanism provided in the valve 1 serves to maximize the through hole B opening degree during the intake stroke in the auxiliary combustion system.
When air is taken into the main combustion chamber from the auxiliary air intake passage A, the penetrating force is strengthened by the through hole B, and it works so as to generate a strong vortex and turbulence in the mixture taken in by the intake valve for the main combustion chamber. The vortex and turbulence remain in the compression stroke to promote flame propagation and to stably burn the lean air-fuel mixture.
This can have the same action as the MCA-JET (registered trademark) system of Japanese Patent Application Laid-Open No. 53-117107 filed by Mitsubishi Motors Corporation, which has a conventional auxiliary suction valve.

[Effect of device]

The present invention can be used for both the sub combustion system and the main combustion system by changing the through hole opening according to the piston stroke and opening and closing the sub intake passage. In the above, each stroke can be independently changed into a free through hole state without being restricted by each other. Therefore, it is possible to achieve ideal performance according to the characteristics of the target engine. Therefore, not only can a high-output engine that does not spontaneously ignite even if the compression ratio is increased, and a clean exhaust gas engine that can stably burn a lean air-fuel mixture, and fuel consumption can be reduced. In addition, since it is possible to adjust the opening degree of the through hole, there is no concern even if the through hole is maximized during the intake stroke. Therefore, the air or the air-fuel mixture is positively ejected to the above-mentioned main combustion chamber, and the above-mentioned MCA- JE
The same main combustion chamber stirring effect as in the T (registered trademark) system can be provided. Furthermore, since the opening / closing operation of the auxiliary air intake passage and the opening of the through hole can be performed by the movement of one valve, it is possible to provide a valve with few failures in the long term and low manufacturing cost.

[Brief description of drawings]

1 and 2 are partial cross-sectional perspective views showing a first embodiment and a second embodiment of the present invention. FIG. 3, FIG. 4 and FIG. 5 are partial sectional views showing a third embodiment of the present invention. 6 and 7
The drawings are partial cross-sectional perspective views showing a fourth embodiment and a fifth embodiment of the present invention. FIG. 8, FIG. 9, FIG. 10, and FIG. 11 are partial sectional perspective views showing a sixth embodiment, a seventh embodiment, an eighth embodiment and a ninth embodiment of the present invention. FIG. 12 is a partial sectional perspective view showing a tenth embodiment of the present invention. A ... Sub intake passage B ... Through hole C ... Inner plate D ... Outer plate 1 ... Valve 2 ... Body 3 ... Plug

Claims (1)

[Scope of utility model registration request] 1. A cylindrical valve has a structure in which two or more kinds of valve hole portions are formed in a wall of the auxiliary combustion chamber chamber while forming a sub combustion chamber having a volume in a body, A single valve movement such as vertical movement or circular movement adjusts the through-hole opening between the combustion chambers and the auxiliary intake passage at least to make one cycle of the piston stroke (intake stroke, compression stroke, combustion stroke, exhaust stroke). ) An engine valve that eliminates the number of valves by opening and closing or adjusting the opening degree of the through-hole state between the combustion chambers and the auxiliary intake passage.