JPH06280572A - Supercharger engine - Google Patents

Abstract

PURPOSE:To provide a supercharger engine of which torque and fuel consumption can be remarkably improved. CONSTITUTION:An intake rotary valve 8 and an exhaust rotary valve 9 which are are formed into cylindrical shapes, provided with hollow parts, and have a little larger diameters than intake and exhaust ports 6, 7, are respectively fitted to the intake and exhaust ports 6, 7 positioned on the same height, the circumferential walls of the intake rotary valve 8 and the exhaust rotary valve 9 of the corresponding parts to the intake and exhaust ports 6, 7 are opened, and the positions of the valves at least opposite side of the opening and shifted in the axial direction are opened. The intake and exhaust rotary valves 8, 9 are positiond so that at the scavenging process, the intake and exhaust rotary valves 8, 9 are both opened, and at the intake process, the exhaust rotary valve 9 is closed and the intake rotary valve is opened, and further the intake rotary valve 8 and the exhaust rotary valve 9 and a crankshaft 14 are interlocked with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-cycle or four-cycle engine used in ships and vehicles for supercharging compressed air into a combustion chamber by a supercharger.

[0002]

2. Description of the Related Art A conventional 2-cycle or 4-cycle supercharger engine is provided with an intake port, an exhaust port, a fuel injection valve and a spark plug in a combustion chamber, a supercharger is connected to the intake port, and an intake port and an exhaust port. A spring valve is attached to the valve to open and close the valve, and the valve reciprocates in conjunction with the rotational movement of the camshaft to open and close the intake port and the exhaust port.

Therefore, even if the curve of the surface of the cam provided on the camshaft is slightly deviated or changed, the opening / closing timing of the valve is changed and the engine performance is greatly affected, or the camshaft is lengthened. It has been necessary to perform various treatments such as hardening the cam surface and induction hardening so that the curve of the cam surface does not change even after a long period of use.

[0004]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to solve these problems in the prior art,
Providing a supercharger engine that can greatly improve fuel efficiency.

[0005]

Means for Solving the Problems The gist of the present invention which has solved the above problems is that a combustion chamber has an intake port and an exhaust port, and a piston reciprocates in the combustion chamber to perform compression, combustion,
In a supercharger engine that repeats the steps of exhaust, scavenging, and intake, and supercharges compressed air from the intake port to the combustion chamber by a supercharger, it has a cylindrical hollow part and has an intake rotation with a slightly larger diameter than the intake and exhaust ports. Attach the valve and the exhaust rotary valve to the intake and exhaust ports at the same height position, open the peripheral wall of the intake rotary valve and the exhaust rotary valve at the portions corresponding to the intake and exhaust ports, and at least on the opposite side of the same shaft. Open the position shifted in the direction, the intake and exhaust rotary valves are in the state where the intake and exhaust rotary valves are open in the scavenging process, the exhaust rotary valve is closed and the intake rotary valve is in the open state in the intake process, A supercharged engine characterized by linking the intake rotary valve, the exhaust rotary valve and the crankshaft. A.

[0006]

The present invention will be described in the case of two cycles.
An intake rotary valve is attached to the intake port and an exhaust rotary valve is attached to the exhaust port. The intake and exhaust rotary valves and the crankshaft are interlocked so that the intake and exhaust rotary valves rotate two times for one crankshaft rotation. In this case, the intake and exhaust rotary valves are opened during the combustion process, but the piston itself that has risen into the combustion chamber blocks the intake and exhaust ports, so the intake and exhaust ports are the same as when closed. The compressed air does not leak, and even if the intake / exhaust rotary valve is open, there is no problem in the combustion process. Enter the process. With combustion, the piston begins to descend, and accordingly, the intake and exhaust rotary valves rotate, the exhaust rotary valve opens, the intake rotary valve closes, and the exhaust gas flows out to the exhaust port.

Further, the intake and exhaust rotary valves rotate, and not only the exhaust rotary valve but also the intake rotary valve are opened, and the scavenging process starts. When the intake rotary valve opens, compressed air is supercharged into the combustion chamber from the supercharger connected to the intake port, and the exhaust gas remaining in the combustion chamber is forcibly and completely discharged to the exhaust port to complete the scavenging process. To do. Furthermore, the intake and exhaust rotary valves rotate, the exhaust rotary valve closes, and only the intake rotary valve opens, and the intake process begins, and supercharged compressed air from the supercharger to the combustion chamber causes compression in the combustion chamber. By increasing the ratio, the intake rotary valve is closed, the intake process is completed, the compression process proceeds, the piston rises, the fuel is injected from the fuel injection valve to fill the combustion chamber with a sufficient mixture, and the mixture is further compressed. Then, when it is compressed to the maximum, the process returns to the above-mentioned combustion process to burn the air-fuel mixture.

These combustion process, exhaust process, scavenging process,
The driving force is generated by repeating the intake process and compression process.

[0009]

EXAMPLE The present invention will be described in the case of four cycles. Intake and exhaust rotary valves are installed in the intake and exhaust ports provided on the upper wall of the combustion chamber, the exhaust rotary valve is opened in the exhaust process, the intake rotary valve is closed, the intake and exhaust rotary valves are opened in the scavenging process, and the intake process is also performed. In order to keep the exhaust rotary valve closed and the intake rotary valve open, the crankshaft and intake and exhaust rotary valves are linked to drive the combustion process, exhaust process, scavenging process, intake process, and compression process repeatedly. Generate power.

Embodiments 1 and 2 of the present invention will be described below with reference to the drawings. Example 1 (see FIGS. 1 to 15) Example 1 is an example applied to a two-cycle supercharger engine.

FIG. 1 is an explanatory view showing the state of the combustion process of the first embodiment, FIG. 2 is an exploded development view of intake and exhaust rotary valves in the combustion process of the first embodiment, and FIG. 3 is a state of the exhaust process of the first embodiment. 4 is an exploded view of the intake and exhaust rotary valves in the exhaust process of the first embodiment, FIG. 5 is an explanatory view showing the state of the scavenging process of the first embodiment, and FIG. 6 is the scavenging process of the first embodiment. 7 is an exploded view of the intake and exhaust rotary valves in FIG. 7, FIG. 7 is an explanatory view showing the state of the intake process of the first embodiment, and FIG.
9, an exploded view of the intake and exhaust rotary valves in the intake process, FIG. 9 is an explanatory view showing the state of the compression process of the first embodiment, and FIG. 10 is an exploded view of the intake and exhaust rotary valves in the compression process of the first embodiment. FIG. 11 is an explanatory view of rotational drive of the intake rotary valve, the exhaust rotary valve and the crankshaft in the scavenging process of the first embodiment shown in FIG. 5, and FIG. 12 is the intake and exhaust rotation in the scavenging process of the first embodiment shown in FIG. 14 is a plan view showing the rotational position of the valve, FIG. 13 is a sectional view taken along line AA of FIG. 12, and FIG.
12 is a sectional view taken along line BB of FIG. 12, and FIG. 15 is a sectional view taken along line CC of FIG.

In the figure, 1 is a two-cycle supercharger engine, 2 is a combustion chamber, 3 is a piston, 4 is a crank for vertically moving the piston 3, 5 is a connecting rod connecting the piston 3 and the crank 4, and 6 is a connecting rod. Intake port, 7 is exhaust port, 8 is intake rotary valve attached to intake port 6, 9
Is an exhaust rotary valve attached to the exhaust port 7, 10 is a fuel injection valve, 11 is a spark plug, 12 is a supercharger, 13 is a mixture, 14 is a crankshaft, 15 is exhaust gas, 16 is a gear, 17 is a gear, 18 is a timing belt.

The first embodiment is a tubular shape having a hollow portion, and has an opening on the front peripheral wall, and also has an opening on the rear peripheral wall on the side opposite to the opening and along the axial direction. 2-cycle supercharger engine in which an exhaust rotary valve 9 having the same structure as the intake rotary valve 8 having a gear-shaped rear end is provided with an intake port 6 and an exhaust port 7 at the same height position in the combustion chamber 2. 1 is attached to the intake and exhaust ports 6 and 7, and the fuel injection valve 10 and the spark plug 11 are provided above the combustion chamber 2.
Is installed.

In the first embodiment, as shown in FIGS. 5 and 6, the intake rotary valve 8 and the exhaust rotary valve 9 are opened in the scavenging process, and the exhaust rotary valve 9 is opened in the intake process shown in FIGS. The intake / exhaust rotary valves 8 and 9 are attached to the intake / exhaust ports 6 and 7 in such a relationship that the intake rotary valve 8 is closed and the intake rotary valve 8 remains open. As shown in FIGS. , Gear 1 of exhaust rotary valve 9
7 and the crankshaft 14 are linked by the timing belt 18, so that one revolution of the crankshaft 14 causes intake air,
The exhaust rotary valves 8 and 9 rotate twice. In the first embodiment, as shown in FIGS. 1 and 2, when the combustion process is started, the intake rotary valve 8 and the exhaust rotary valve 9 are in the open state, but the intake port 6 and the exhaust port 7 are increased as the piston 3 rises. The piston 3 itself will block the intake and exhaust ports 6,
7 is closed, the combustion process proceeds without any problem, and the ignition plug 11 ignites and combusts the maximum compressed air-fuel mixture 13.

As shown in FIGS. 3 and 4, when the exhaust process is started, the piston 3 starts to descend, the crankshaft 14 rotates, and the intake and exhaust rotary valves 8 and 9 rotate in conjunction with each other, and the exhaust rotary valve 9 Only the exhaust gas 15 is opened, and the exhaust gas 15 is discharged from the exhaust port 7.

When entering the scavenging process as shown in FIGS.
The exhaust rotary valve 9 and the intake rotary valve 8 are opened, and the supercharged engine 12 connected to the intake port 6 supercharges the compressed air into the combustion chamber 2 to force the exhaust gas 15 which has not been exhausted and Eject completely.

As shown in FIGS. 7 and 8, when the intake stroke is started, the exhaust rotary valve 9 is closed and the intake rotary valve 8 is left open, so that the supercharger 12 continues to perform supercharging compression. The combustion chamber 2 is sufficiently filled with air, and the compression ratio is improved. As shown in FIGS. 9 and 10, the compression process is started, the intake rotary valve 8 and the exhaust rotary valve 9 are closed, and the piston 3 rises to move to the combustion chamber 2
The compressed air inside is further compressed, and the fuel is injected from the fuel injection valve 10 to be compressed to the maximum.

Above, the combustion, exhaust, scavenging, intake, and compression steps are repeated to generate the driving force.

Example 2 (see FIGS. 16 to 23) Example 2 is an example applied to a 4-cycle supercharger.

FIG. 16 is an explanatory view showing the state of the combustion process of the second embodiment, FIG. 17 is an exploded explanatory view of intake and exhaust rotary valves in the combustion process of the second embodiment, and FIG. 18 is a state of the exhaust process of the second embodiment. FIG. 19 is an exploded view of the intake and exhaust rotary valves in the exhaust process of the second embodiment, FIG. 20 is an explanatory view showing the state of the intake process of the second embodiment, and FIG. 21 is the intake process of the second embodiment. 22 is an exploded explanatory view of the intake and exhaust rotary valves in FIG. 22, FIG. 22 is an explanatory view showing a state of a compression process of the second embodiment,
FIG. 23 is an exploded view of the intake and exhaust rotary valves in the compression process of the second embodiment. Reference numerals in the figure are the same as those in the first embodiment.

In the second embodiment, an intake rotary valve 8 having a hollow cylindrical middle wall with an opening, and a gear 16 attached to the rear end of the cylinder, and an opening on the middle peripheral wall. Have a
An exhaust rotary valve 9 having four openings around the center point before and after the opening is attached to the intake and exhaust ports 6 and 7 mounted on the upper wall of the combustion chamber 2, and the gear 16 of the intake rotary valve 8 is attached. A gear 17 of the exhaust rotary valve 9 and a crankshaft 14 are interlocked with each other, and an ignition plug 11 is attached to the upper wall of the combustion chamber 2.

In the second embodiment, as shown in FIG. 16, the exhaust port 7 and the intake port 6 are in a closed state, and the ignition plug 11 ignites and burns the air-fuel mixture 13 when it is compressed to the maximum. When the combustion process ends, as shown in FIG. 18, the piston 3 begins to descend and the crankshaft 14 rotates,
When the intake and exhaust rotary valves 8 and 9 rotate in conjunction with each other to enter the exhaust process, the exhaust rotary valve 9 and the intake rotary valve 8 are opened, the exhaust gas 15 is exhausted from the exhaust port 7, and the intake air is exhausted. Air is supplied from the port 6 and the exhaust gas 15 which has not been discharged is forcibly and completely discharged. Figure 2
As shown in FIG. 2, when entering the intake stroke, the exhaust rotary valve 9 is closed and the intake rotary valve 8 is open. The intake rotary valve 8 fills the combustion chamber 2 with the air-fuel mixture 13 and the intake rotary valve 8 is closed. The process ends and the compression process is started as shown in FIG. The piston 3 rises to compress the air-fuel mixture 13 in the combustion chamber 2, and when it is compressed to the maximum, the combustion process described above is returned to, and the driving force is generated by repeating the process.

[0023]

As described above, according to the present invention, since the intake and exhaust rotary valves rotate in association with the rotation of the crankshaft, the opening and closing timings of the intake rotary valve and the exhaust rotary valve can be adjusted easily and accurately. Moreover, since a camshaft and a valve spring are unnecessary, it is possible to reduce the weight and weight. Even when used for a long period of time, the compression ratio is reduced due to the deviation of the opening and closing of the intake and exhaust rotary valves caused by the change of the surface curve of the camshaft. Accurate opening and closing timing was maintained even during the period of use, a sufficient compression ratio was obtained, and torque and fuel efficiency were improved, resulting in improved engine performance.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state of a combustion process of Example 1.

FIG. 2 is an exploded development view of intake and exhaust rotary valves in a combustion process of the first embodiment.

FIG. 3 is an explanatory diagram showing a state of an exhaust process of Example 1.

FIG. 4 is an exploded development view of the intake and exhaust rotary valves in the exhaust process of the first embodiment.

FIG. 5 is an explanatory diagram showing a state of a scavenging process of Example 1.

FIG. 6 is an exploded development view of the intake and exhaust rotary valves in the scavenging process of the first embodiment.

FIG. 7 is an explanatory diagram showing a state of an intake process of the first embodiment.

FIG. 8 is an exploded development view of the intake / exhaust rotary valve in the intake process of the first embodiment.

FIG. 9 is an explanatory diagram showing a state of a compression process of Example 1.

FIG. 10 is an exploded development view of the intake and exhaust rotary valves in the compression process of the first embodiment.

11 is a rotational driving explanatory view of an intake rotary valve, an exhaust rotary valve and a crankshaft in a scavenging process of the first embodiment shown in FIG.

FIG. 12 is a plan view showing the rotational positions of the intake and exhaust rotary valves during the scavenging process of the first embodiment shown in FIG.

13 is a cross-sectional view taken along the line AA of FIG.

14 is a cross-sectional view taken along the line BB of FIG.

FIG. 15 is a sectional view taken along line CC of FIG.

FIG. 16 is an explanatory diagram showing a state of a combustion process of Example 2.

FIG. 17 is an exploded view of the intake and exhaust rotary valves in the combustion process of the second embodiment.

FIG. 18 is an explanatory diagram showing a state of an exhaust process of Example 2.

FIG. 19 is an exploded view of the intake and exhaust rotary valves in the exhaust process of the second embodiment.

FIG. 20 is an explanatory diagram showing a state of an intake process of the second embodiment.

FIG. 21 is an exploded view of the intake and exhaust rotary valves in the intake process of the second embodiment.

FIG. 22 is an explanatory diagram showing a state of a compression process of Example 2.

FIG. 23 is an exploded view of the intake and exhaust rotary valves in the compression process of the second embodiment.

[Explanation of symbols]

 1 2 cycle supercharger engine 2 combustion chamber 3 piston 4 crank 5 connecting rod 6 intake port 7 exhaust port 8 intake rotary valve 9 exhaust rotary valve 10 combustion injection valve 11 spark plug 12 supercharger 13 mixture 14 crankshaft 15 exhaust gas 16 Gear 17 Gear 18 Timing Belt

Claims (1)

[Claims] 1. A combustion chamber has an intake port and an exhaust port, and a piston reciprocates in the combustion chamber to compress, burn,
In a supercharger engine that repeats the steps of exhaust, scavenging, and intake, and supercharges compressed air from the intake port to the combustion chamber by a supercharger, it has a cylindrical hollow part and has an intake rotation with a slightly larger diameter than the intake and exhaust ports. Attach the valve and the exhaust rotary valve to the intake and exhaust ports at the same height position, open the peripheral wall of the intake rotary valve and the exhaust rotary valve at the portions corresponding to the intake and exhaust ports, and at least on the opposite side of the same shaft. Open the position shifted in the direction, the intake and exhaust rotary valves are in the state where the intake and exhaust rotary valves are open in the scavenging process, the exhaust rotary valve is closed and the intake rotary valve is in the open state in the intake process, A supercharged engine characterized by linking the intake rotary valve, the exhaust rotary valve and the crankshaft.