JP2002276398A - Measure for valve or air opening opened in intake stroke and closed after starting compression stroke in use of piston valve or rotary valve to 4-cycle gasoline engine or 6-cycle gasoline engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart a smooth flow to an air-fuel mixture getting in and out from a valve [piston valve (valve b)] or air opening [rotary valve (air opening c)] opened in an intake stroke and closed after starting a compression stroke in the use of a piston valve or rotary valve to a 4-cycle gasoline engine or 6-cycle gasoline engine. SOLUTION: The valve b or air opening c are divided to two kinds of a valve (valve d) or air opening (air opening e) opened in the intake stroke and closed in a bottom dead center and a valve (valve f) or air opening (air opening g) opened in the bottom dead center and closed after starting the compression stroke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for coping with a Miller cycle of a four-stroke gasoline engine (Heisei 5).
(Japanese Patent Application No. 278793) and a method of coping with a Miller cycle when a rotary valve is used in a four-cycle gasoline engine (Patent Application No. 354993 in 1993)
No.) and a method of responding to the Miller cycle of a 6-cycle gasoline engine (1993 Patent Application No. 355469)
And how to respond to the Miller cycle when using a rotary valve in a 6-cycle gasoline engine (Heisei 6
Of Japanese Patent Application No. 72380) and the 4-cycle gasoline engine for Miller cycle (Japanese Patent Application No.
No. 38307), the use of a rotary valve in a four-stroke gasoline engine, the use of a Miller cycle (patent application No. 267,956 / 1994), the combustion efficiency improving engine of a four-stroke gasoline engine, and assistance to the engine Device (1994 Patent Application No. 329729), a combustion efficiency improving engine when a rotary valve is used in a 4-cycle gasoline engine, and an auxiliary device for the engine (1995)
(Hereinafter referred to as engine a), which relates to a valve (piston valve) and an air port (rotary valve) that are opened in the intake process, closed after entering the compression process, and used in Japanese Patent Application No. 63270). , Open in the intake process,
The valve that is closed after the compression process is started is referred to as a valve b, and the air port is
The intake process of the 6-cycle gasoline engine is the first intake process. ).

[0002]

2. Description of the Related Art In a conventional engine a, a valve b or a vent c is of one type.

[0003] Since the valve b or the air port c is of one type, the air-fuel mixture passes through the valve b or the air port c to enter or exit (exit or enter) a passage to an empty space. Going back and forth (round trip), going in and out of empty space, going in and out (in and out),
4 cycle gasoline engine, 4 cylinders or more, 6
In the case of a cycle gasoline engine, in a passage connecting the valve b and the valve b or the port c and the port c with six or more cylinders,
Go back and forth (round trip).

[0004]

In the conventional engine a, since the valve b or the air port c is of one type, when the valve b or the air port c enters or exits, a passage to a space where there is nothing is provided. During round trip,
When entering and exiting a space where there is nothing, and when reciprocating in a passage connecting the valves b and b or the ports c and c, the air-fuel mixture interferes with each other to perform a smooth (smooth) process. There was a problem that there was no.

An object of the present invention is to obtain a smooth flow in the air-fuel mixture of the engine a.

[0006]

In order to achieve the above object, the valve b or the air port c is opened in the suction process and closed at the bottom dead center. The valve is closed after entering the process, and is divided into two types (hereinafter, the valve that opens in the intake process and closes at the bottom dead center is the valve d.
The vent e, the valve that opens at bottom dead center and closes after entering the compression process is the valve f, and the vent is the vent g. ).

The valve d and the valve f or the air port e and the air port g
Attach passages to and from empty spaces at the ends of empty spaces.

In the case of a four-stroke gasoline engine, when the number of cylinders is four or more, when the valve d or the port e is opened in the intake stroke, at that time, the valve f or the port g of another cylinder is opened.
, Directly connected to the valve f or the air g, which is closed in the compression step.

Further, in the case of a six-cycle gasoline engine, when the number of cylinders is six or more, when the valve d or the port e is opened in the first intake process, at that time, the valve f or the port of another cylinder is used. In g, connect directly to valve f or vent g, which is closed in the compression step.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a cross-sectional view showing the arrangement of valves when a piston valve is used in a four-stroke gasoline engine as a representative of the engine a. In short, an intake valve for an air-fuel mixture, an exhaust valve, and a valve b to the valve d
(Following, the intake valve of the air-fuel mixture is a valve h, and the exhaust valve is a valve i).

Further, although a cross-sectional view showing the arrangement of the valves when a piston valve is used in a 6-cycle gasoline engine is not shown, it is not shown in the intake process (first intake process) and the compression process. Since the movements of the valves d and f are the same, they are omitted here.

And a 4-cycle gasoline engine, 6
Although a cross-sectional view of an engine using a rotary valve as the cycle gasoline engine is not drawn, the opening and closing of the valves d and e and the valves f and g in the respective steps are the same, and are omitted here.

In the embodiment shown in FIGS. 2 to 6, FIG.
Shows a process assuming that it is viewed from the direction of the cross section AA,
FIGS. 2 to 6 are longitudinal sectional views, and FIGS. 2 to 6 show an intake process of an air-fuel mixture. Valve h is open, valve i is closed, valve d is open, and valve f is closed. The valve f is opened at the top dead center and closed at the bottom dead center, and is also a figure just before closing.) FIG. 3 Compression Step-1 Valve h, valve i and valve d are closed and valve f is open (valve f shown in FIG. 3 is open at bottom dead center and the piston is about one third
The figure is a diagram assuming that it closes when it rises, and is also a diagram immediately before closing. ). FIG. 4 Compression process-2 (ignition) Valve h, valve i, valve d, and valve f are closed. FIG. 5 Expansion process (combustion) The valve h, the valve i, the valve d, and the valve f are closed. FIG. 6 Exhaust Step Valve h is closed, valve i is open, and valves d and f are closed (the valve i shown in FIG. 6 is open at the bottom dead center and closed at the top dead center. It is also a figure.) FIG.

Further, the valve timings of the valves in the steps shown in FIGS. 2 to 6 are not included, and the valve timings are not included, so that the steps can be easily understood.

Each step is also a view immediately before completion.

Although a drawing of a process when a piston valve is used in a 6-cycle gasoline engine is not shown, an intake process (in the case of a 6-cycle gasoline engine,
The first intake process. ) And the movement of the valves d and f during the compression step are the same, and are therefore omitted here.

And a 4-cycle gasoline engine, 6
There is no drawing of a rotary gasoline engine using a rotary valve.
H type [Rotary valve (1991 Patent Application No. 356145) instead of piston valve used for 4 cycle engine and 6 cycle engine, and rotary valve used for 4 cycle engine and 6 cycle engine Intake and exhaust method (patent application No. 218 of 1992)
No. 116). Or add one more to it. [Use of two ignition points when performing the intake and exhaust process with one rotary valve per cylinder of rotary valves used in four-cycle engines and six-cycle engines] The use of three rotary valves per cylinder and the use of two ignition points (1994 Patent Application No. 174662). Thus, the process diagram can be drawn by providing each air port, but since the opening and closing of the valve and air port in the suction process and the compression process are the same, they are omitted here.

In the embodiment shown in FIG. 7, a diagram of an in-line four-cylinder when a piston valve is used in a four-stroke gasoline engine is drawn, and a different process is performed for each cylinder. When the valve d opens in the intake stroke, at that time, among the valves f of the other cylinders, the valve f which closes in the compression stroke,
It is a figure showing that only what is directly connected (passage, pipe) is sufficient.

A diagram of five or more cylinders satisfying the above conditions can be drawn. However, since the valve d and the valve f are related to two or more cylinders, the operation may be difficult to understand, so that the description is omitted here.

Although a drawing using a rotary valve satisfying the above conditions can be drawn, the opening and closing of the valve d and the opening e and the opening and closing of the valve f and the opening g are the same, so that they are omitted here.

The embodiment shown in FIG. 8 is a drawing of an in-line six-cylinder when a piston valve is used in a six-cycle gasoline engine, and each cylinder performs a different process. FIG. 9 is a diagram showing that when the valve d is opened in the first intake process, only a valve directly connected to the valve f which is closed in the compression process among the valves f of the other cylinders at that time.

A diagram of seven or more cylinders satisfying the above conditions can also be drawn. However, since the valves d and f are related to two or more cylinders, the operation may be difficult to understand, so that the description is omitted here.

A diagram using a rotary valve that satisfies the above conditions can be drawn. However, since the opening and closing of the valve d and the opening e and the opening and closing of the valve f and the opening g are the same, they are omitted here.

Further, V type, W type, X type, star type, H type,
Regardless of the engine type such as the horizontally opposed type, when using a piston valve and a rotary valve in a 4-cycle gasoline engine, the number of cylinders must be 4 or more. When using a piston valve and a rotary valve in a 6-cycle gasoline engine, the number must be 6 cylinders. As described above, the relationship between the valves d and f and the relationship between the openings e and g can be drawn.

In FIGS. 1 and 2, an empty space is provided, and the passages of the valves d and f to the empty space are as follows.
It is attached to the end of the empty space.

Furthermore, since the air-fuel mixture enters the empty space and is liquefied, the empty space and the passage to the empty space are preferably located above the cylinder.

[0027]

Since the present invention is configured as described above, it has the following effects.

Since the valves b and c are replaced by the valves d and f and the ports e and g, the air-fuel mixture flows in a certain direction.
When there is only one type of valve b and air port c, when entering and exiting an empty space, when entering and exiting a cylinder from valve b and air port c, when there is no space from valve b and air port c. During round trip in the passage, 4
In the case of a cycle gasoline engine, there are four or more cylinders and six
In the case of a cycle gasoline engine, since there is no interference between the air-fuel mixtures at the time of reciprocation in the passage connecting the valves b and b or the ports c and c with six or more cylinders, a smooth process can be performed. .

The valve d and the valve f, or the air port e and the air port g
However, due to the fact that the passage to the empty space is attached to the end of the empty space, the interference between the air-fuel mixtures is reduced,
This also allows a smooth process to be performed.

Then, for a 4-cycle gasoline engine,
If a piston valve or rotary valve is used,
With four or more cylinders, it is possible to continually cause any one of the cylinders to perform a different process.
When the air port e is opened, at that time, in the valve f and the air port g of the other cylinder, it is closed in the compression process. Due to the direct connection to the valve f and the air port g, no space is required. In addition, a smooth process can be performed.

Further, the resistance during the intake process and the compression process can be reduced.

Further, for a 6-cycle gasoline engine,
If a piston valve or rotary valve is used,
In six or more cylinders, any one of the cylinders can constantly perform a different process, so at the time of the first intake process, when the valve d or the vent e is opened,
Valve f, mouth g, closed in compression process in valve f, mouth g
Because of the direct connection, no space is required, and a smooth process can be performed.

Further, the resistance during the first suction step and the compression step can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing locations of a valve h, a valve i, a valve d, a valve f, and a plug when a piston valve is used in a four-cycle gasoline engine.

FIG. 2 is a longitudinal sectional view showing a process assuming that FIG. 1 is viewed from a direction of a cross section AA (an air-fuel mixture intake process).

FIG. 3 is a longitudinal sectional view showing a step assuming that FIG. 1 is viewed from the direction of the section AA (compression step-1).

FIG. 4 is a longitudinal sectional view showing a step assuming that FIG. 1 is viewed from the direction of the section AA [compression step-2 (ignition)].

FIG. 5 is a longitudinal sectional view showing a step assuming that FIG. 1 is viewed from the direction of the section AA [expansion step (combustion)].

FIG. 6 is a longitudinal sectional view showing a step assuming that FIG. 1 is viewed from the direction of the section AA (exhaust step).

FIG. 7 is a longitudinal sectional view of an in-line four-cylinder when a piston valve is used in a four-cycle gasoline engine.

FIG. 8 is a longitudinal sectional view of an in-line six-cylinder when a piston valve is used in a six-cycle gasoline engine.

[Explanation of symbols]

1 Intake valve (valve h) for air-fuel mixture of 4-cycle gasoline engine 2 Exhaust valve (valve i) of 4-cycle gasoline engine 3 Valve that opens in intake process and closes at bottom dead center (valve d) 4 At bottom dead center Valve that opens and closes after entering the compression process (valve f) 5 Plug 6 Empty space (place where air-fuel mixture temporarily stops) 7 Vaporizer 8 Intake pipe for air-fuel mixture 9 Exhaust pipe 10 Nothing for valve d Passage (pipe) from space 11 Passage (pipe) of valve f to empty space 12 Piston 13 Valve h, valve i 14 Valve d, valve f 15 Passage (pipe) connecting valve d and valve f 16 Intake Immediately before completion of the process (immediately before completion of the air-fuel mixture intake process) 17 immediately before completion of the compression process 18 immediately before completion of the expansion process 19 immediately before completion of the exhaust process 20 immediately before completion of the first air intake process (immediately before completion of the air-fuel mixture intake process) 21 first exhaust process Immediately before completion 22 Second intake process completed Immediately before (immediately before the completion of the air intake process) 23 Immediately before the completion of the second exhaust process AA cross section BB cross section Engine a Method for responding to the Miller cycle of a 4-stroke gasoline engine (Patent Application No. 278793 of 1993)
No.), a method of coping with a Miller cycle when a rotary valve is used in a 4-cycle gasoline engine (Patent Application No. 354993 of 1993), and a method of coping with a Miller cycle of a 6-cycle gasoline engine ( Heisei 5
(Japanese Patent Application No. 355469) and a method of coping with the Miller cycle when a rotary valve is used in a 6-cycle gasoline engine (Japanese Patent Application No. 72380).
And the 4-cycle gasoline engine for the Miller cycle (Japanese Patent Application No. 238307), and the 4-cycle gasoline engine for the Miller cycle when a rotary valve is used (Japanese Patent Application No. 267
No. 955) and an engine for improving the combustion efficiency of a four-cycle gasoline engine and an auxiliary device for the engine (Japanese Patent Application No.
No. 29729) and a combustion efficiency improving engine when a rotary valve is used in a four-cycle gasoline engine, and an auxiliary device for the engine (1995 Patent Application No. 63270). Valve b Valve that opens in the intake process and closes after entering the compression process. Vent c Valve that opens in the intake process and closes after entering the compression process. Valve d Valve that opens in the intake process and closes at the bottom dead center. A valve that opens at bottom dead center and closes at the bottom dead center Valve f A valve that opens at bottom dead center and closes after entering the compression process Vent g A port that opens at bottom dead center and closes after entering the compression process Valve h 4-cycle gasoline engine Air-fuel mixture intake valve Valve i 4-cycle gasoline engine exhaust valve

Claims (4)

[Claims] 1. A four-cycle gasoline engine and a six-cycle gasoline engine (Japanese Patent Application No. 417964).
No.), when a piston valve and a rotary valve (1991 Patent Application No. 356145) are used, a valve (piston valve) and an air port (rotary valve) that are opened in the suction process and closed after the compression process is started. , Open in the intake process,
Valves and vents that close at bottom dead center, and valves and vents that open at bottom dead center and close after entering the compression process are divided into two types (the intake process of a 6-cycle gasoline engine is the first intake process Although the expressions are slightly different from those of the valve and the mouth which are opened in the intake process and closed after entering the compression process, 1993 Patent Application No. 278793 and 1993 Patent Application No. 354993
, 1993 Patent Application No. 355469, 1994 Patent Application No. 72380, and 1994 Patent Application No. 238307.
No., Japanese Patent Application No. 627955, 1994 Patent Application No. 329729, and Japanese Patent Application No. 63270
The valve and the spirit in the issue. ). 2. The empty space of the valve and air port according to claim 1, which opens at the intake process and closes at the bottom dead center, and the valve and air port opens at the bottom dead center and closes after entering the compression process. Attach passages (tubes) to (where the mixture temporarily stagnates) end to end in empty space. 3. When a piston valve and a rotary valve are used in a four-cycle gasoline engine, an intake process (air-fuel mixture intake process), a compression process (ignition), an expansion process (combustion process), and an exhaust gas for four or more cylinders. The process and any one of the cylinders can be continuously performed in any one of the steps. Therefore, the valve and air port that opens at the intake step and closes at the bottom dead center according to claim 1, and opens at the bottom dead center, When the valve and the port that are closed after entering the compression process, the relationship with the other cylinders are opened in the intake process, and the valve and the port that is closed at the bottom dead center are opened in the intake process, then the other cylinders are opened. A valve that opens at the bottom dead center and closes after entering the compression process, a valve that closes in the compression process in the vent,
Connect directly to your mood. 4. When a piston valve and a rotary valve are used in a 6-cycle gasoline engine, a first intake step (air-fuel mixture intake step), a compression step (ignition), and an expansion step (combustion step) are performed for six or more cylinders. 2. The method according to claim 1, wherein the first exhaust step, the second intake step (air intake step), the second exhaust step, and any one of the cylinders can be continuously performed. The relationship between the valve and air port that opens in the first intake process and closes at the bottom dead center and the valve and air port that opens at the bottom dead center and closes after entering the compression process is described in the first time. When the valve and vent open in the intake process and close at the bottom dead center, and the vent opens in the first intake process, the valve and vent open at the bottom dead center of the other cylinder and close after entering the compression process. Inside, it connects directly to the valve and vent that closes in the compression process.