JP2003161174A - Intake/exhaust device using common valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such problems that, though output improvement in a conventional internal combustion engine needs to burn a fuel in an amount as large as possible and also to enhance its combustion efficiency, since the locations of intake and exhaust valves and passages are fixed despite the limited timing of suction and discharge, the place capable of using in a necessary timing is limited and thus, the intake/exhaust efficiencies are poor, and further that, since the layout of wall face of the engine is limited for enhancing the above efficiencies, it is difficult to create the configuration for the above purpose, that is, configuration of a combustion chamber, that for air stream guiding or the like. <P>SOLUTION: A common valve which is a common inlet or outlet usable for suction, exhaust or other equipment is used in replacement of the valves for a conventional intake/exhaust device installed on the wall face of the internal combustion engine, and the valves and passages branched to suction, exhaust or the like are installed at the outside (in view of a combustion chamber) of the common valve which does not contact the wall face. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake / exhaust device for an internal combustion piston engine in which an internal combustion wall surface (combustion chamber / cylinder) is provided with intake / exhaust valves and passages.

[0002]

2. Description of the Related Art In a conventional internal combustion cycle engine such as a 2-cycle / 4-cycle engine, intake air and exhaust gas are sent into a combustion chamber through separate passages and valves to burn air, fuel or an air-fuel mixture for combustion. It is discharged from the room. Therefore, the valves and passages of the intake / exhaust device must be made in a limited area adjacent to the combustion chamber or cylinder, but the use of the internal combustion wall is limited because the intake and exhaust use different locations. It was

In order to improve the output of the internal combustion engine, it is necessary to burn as much fuel as possible and to improve the efficiency of the combustion, but the timing of intake / exhaust is limited in the conventional engine. Despite this, since the intake and exhaust valves and passages are located, the places that can be used at the required timing are limited, and the intake and exhaust efficiency was poor.

Further, if the intake / exhaust efficiency is increased, the layout of the internal wall surface is limited, and it has been difficult to create a shape for increasing the combustion efficiency, such as the shape of the combustion chamber or the shape that guides the air flow.

[0005]

In such usage of the internal combustion wall surface of the conventional internal combustion engine, the internal wall surface usage rate at a specific timing is low.

Further, the degree of freedom in layout of intake and exhaust valves, intake and exhaust passages, and combustion chambers is also limited.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to effectively use a limited place such as a combustion chamber or a cylinder and to change the shape to improve the intake and exhaust efficiency and the combustion efficiency. Raise and improve output and fuel efficiency.

In addition, make space for installing new technologies and instruments in limited places such as combustion chambers and cylinders.

Another object is to widen the degree of freedom in layout, size, performance and characteristics of the entire internal combustion engine.

[0010]

In order to achieve the above object, the present invention makes it possible to use valves, which are inlets and outlets of intake and exhaust devices, which are conventionally installed on the wall surface of an internal combustion chamber, for intake, exhaust and other devices. Use a common valve that serves as a common inlet and outlet, and intake air outside the common valve (when viewed from the combustion chamber) that does not contact the internal combustion wall.
Attach valves and passages to separate exhaust and other components.

In an example in which a valve other than the valve in contact with the combustion chamber is attached, a valve is installed in the intake passage in order to control the intake amount with respect to the intake valve in contact with the combustion chamber, as in Japanese Patent Laid-Open No. 07-042637. However, this is a control valve attached to increase the combustion efficiency by controlling the air flow such as swirl and tumble, and the present invention provides a valve that selectively uses intake air and exhaust gas, and let's use different devices jointly Therefore, the conventional valve provided in the intake passage and the conventional valve provided in the exhaust passage are different from the gist of the present invention.

[0012]

According to the present invention, the output can be improved by improving the intake and exhaust efficiency of each cycle by providing a common valve for a part or all of the engine of each cycle.

Further, the degree of freedom in layout of the internal combustion wall surface portion such as the combustion chamber and the cylinder is increased as compared with the conventional case, so that the design for increasing the combustion efficiency is facilitated and the output is improved.

Further, since the degree of freedom of layout is increased, the strength of the internal combustion engine is mechanically increased, and the degree of freedom of materials used for the internal combustion engine is increased, so that the cost can be reduced.
In addition, the internal combustion engine can be made lighter and more compact.

[0015]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a patented 11-stroke engine for a 4-cycle engine.
FIG. 2 is a cross-sectional view of a product in which an intake device from a cylinder head of 218053 is installed and the present invention is combined, and shows a bottom dead center of a piston during intake of the engine.

Japanese Patent Laid-Open No. 11-218053 uses the upper portion of the cylinder head as an intake port. In this embodiment, the patent open 11-218053 is used as the common valve intake port 7.

A conventional four-cycle engine has an intake port 4
The air-fuel mixture enters from the cylinder 16 and burns in the combustion chamber 15,
Combustion gas is discharged from the exhaust port 8. In the present embodiment, during intake, air is taken into the cylinder 16 from two directions of the intake port 4 and the common valve intake port 7, burns in the combustion chamber 15, and during exhaust, the common valve intake valve 13 and the common valve exhaust valve 14 Is horizontally rotated to exhaust the combustion gas from the exhaust port 8.

In the present embodiment, a valve which has conventionally used only an exhaust valve is used as a common valve 9 as a common inlet / outlet port of an intake / exhaust device, and a common valve intake valve 13 and a common valve exhaust valve outside the combustion chamber 15 are used. The fact that the intake / exhaust can be controlled by 14 corresponds to the definition of the common valve in this embodiment.

In this embodiment, two common valve intake ports 7 and four intake ports 4 are provided. If the present invention is used, the common valve 9 and the common valve intake valve 13 which do not have a dedicated intake valve
Only the common valve exhaust valve 14 is in contact with the combustion chamber.
One single-valve engine is also possible, but in this case, exhaust and intake are not performed sufficiently because intake is not possible unless exhaust is complete. Overlapping of the valves is necessary for sufficient intake and high output. In this embodiment, in order to solve this problem, the intake port 4 and the intake valve 10 are provided to deal with this problem.

By combining the common valve with the conventional intake / exhaust valves in this way, it is possible to achieve higher performance than conventional engines, such as higher output and higher fuel consumption, and to set the output characteristics of the engine widely. it can.

If the exhaust valve is used as a common inlet / outlet with the intake valve, a common valve can be used for a two-cycle engine, a four-cycle engine, or an air-only valve used for an eight-cycle engine such as Japanese Patent Laid-Open No. 11-200879. It can be used to improve performance.

[0023]

As is apparent from the above description, according to the present invention, the intake / exhaust efficiency can be improved and the output can be improved by providing a common valve in the internal combustion piston engine.

Further, since the degree of freedom in layout is increased, it is possible to provide a space for installing new technology and instruments in a limited place such as a combustion chamber or a cylinder.

Further, by expanding the flexibility of the layout, size, performance and characteristics of the internal combustion engine as a whole, it becomes easier to design to increase combustion efficiency and output and fuel efficiency are improved.

By utilizing the degree of freedom of layout, the strength of the internal combustion engine can be mechanically increased, and the degree of freedom of materials used for the internal combustion engine is increased, so that the cost can be reduced.

Further, the internal combustion engine can be reduced in weight and size.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a piston bottom dead center during intake, schematically showing the configuration of an embodiment of an engine using a common valve according to the present invention.

[Explanation of symbols]

1 cylinder block 2 cooling passages 3 cylinder head 4 intake ports 5 camshaft 6 Spark plug hole 7 common valve intake port 8 exhaust ports 9 common valves 10 intake valves 11 Stem guide 12 tappets 13 common valve intake valve 14 common valve exhaust valve 15 combustion chambers 16 cylinders

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F02M 25/07 510 F02M 25/07 510B F term (reference) 3G062 BA06 EA01 ED01 ED06 ED07 ED13 3G065 AA09 AA10 CA00 DA01 FA01 HA06 KA11 3G092 AA01 AA03 AA04 AA17 DA01 DA02 DC05 DF01 DF02 DF08 FA02 FA50

Claims (3)

[Claims] 1. An internal combustion piston engine provided with a valve shared by an intake and exhaust system. 2. An internal combustion piston engine having a passage shared by an intake and exhaust device. 3. An internal combustion piston engine in which intake air and exhaust gas are temporarily stored, exhaust gas is reused, and a new valve is shared when the valve is shared.