JPS59229017A - Four-cycle engine - Google Patents

Abstract

PURPOSE:To improve output by communicating a crank chamber through an air feed pipe to a suction port at a cylinder head. CONSTITUTION:During a compression stroke where a piston 1 rises, a suction reed valve 14 is opened to supply an air-fuel mixture into a crank chamber 3. During an explosion stroke where the piston 1 lowers, a feed reed valve 13 is opened to feed the air-fuel mixture in the crank chamber 3 through an air feed pipe 8 to a chamber 17. During an exhaustion stroke where the piston 1 rises, the suction reed valve 14 is opened to supply an air-fuel mixture into the crank chamber 3. During a suction stroke where the piston 1 lowers, the air-fuel mixture previously stored in the chamber 17 is fed to a cylinder 2. Until the piston 1 is lowered to reach a bottom dead center, the air-fuel mixture in the crank shaft 3 is fed to the cylinder 2.

Description

[Detailed description of the invention] The invention is used in the field of internal combustion engines.

More specifically, the engine is used in 4-cycle spark ignition engines and 4-cycle compression ignition engines.

The present invention relates to a four-stroke cycle engine that increases output.

A four-stroke cycle engine has: (a) The intake stroke in which the intake valve is open while the piston descends from top dead center to bottom dead center, drawing flammable air-fuel mixture into the cylinder.

←) A compression stroke in which the piston rises from bottom dead center to top dead center while the intake and exhaust valves are closed, compressing the air-fuel mixture and raising its temperature.

(c) At the end of the compression stroke, an electric spark is ignited in the air-fuel mixture, causing the piston to descend.

Exhaust stroke in which the four exhaust valves open and the burned gas is discharged from the cylinder as the piston rises from bottom dead center to top dead center.

The structure is such that one cycle is completed in the four strokes of suction, compression, explosion, and exhaust described above, that is, two rotations of the crank.

By the way, in order to improve the output of an engine, it is necessary to increase the weight of air that enters the cylinder per unit time, and in recent years, turbochargers have been installed in passenger cars and motorcycles.

The sound of the present invention can be achieved within a unit time by simply improving a part of the engine itself without installing accessories such as a turbo charger.
After intensive research into the possibility of increasing the weight of air that enters the cylinder, we have finally come up with the present invention.

That is, the present invention connects the intake pipe for sucking the air-fuel mixture to the crank chamber, communicates the crank chamber and the intake hole of the cylinder head via the air pipe, and has a non-return check on each of the intake pipe and the air pipe. d) A valve is installed to supply the air-fuel mixture from the intake pipe into the crank chamber due to the pressure change caused by the vertical movement of the piston, and the air-fuel mixture that flows into the crank chamber from the air supply pipe is pressurized into the cylinder. This increases the output of the engine.

(Example) The present invention will be explained in more detail based on an example of a four-stroke spark ignition engine shown in the drawings.

Engine A includes a cylinder 2 into which a piston 1 is fitted,
It is equipped with a crank chamber 3 in which a crank part 4 for converting the linear motion of the piston 1 into rotational motion is provided, and the piston 1 and the crank part 4 are connected by a connecting rod 10.

The upper part of the cylinder 2 has an intake hole 11 provided with an intake valve 5,
An exhaust hole 12 provided with an exhaust valve 7 is provided with a spark plug 6, an air supply pipe 8 and an intake pipe 9 are connected to the crank chamber 3, and an air supply reed pulp 1 is installed in the middle of the air supply pipe 8 and intake pipe 9.
3 and an intake reed valve 14, respectively.

Note that 17 in the figure is a chamber for temporarily storing the air-fuel mixture, and the present invention does not necessarily require this chamber 17, and it is possible to sufficiently cope with this by increasing the inner diameter of the air pipe 8. It's straining.

This embodiment works as follows.

That is, FIG. 1 shows the intake stroke of engine A according to the present invention, FIG. 2 shows the compression stroke, FIG. 3 shows the explosion stroke, and FIG. 4 shows the exhaust stroke. , the intake valve 5 provided at the top of the cylinder 2 is opened,
The air-fuel mixture previously stored in the chamber 17 is sent into the cylinder 2. At this time, the piston 1 moves downward t as shown by the arrow, and as the piston 1 descends to the bottom dead center as shown in the figure, the pressure inside the crank chamber 3 increases.
The air reed valve 13 opens, and the air-fuel mixture in the crank chamber 3 is forced into the cylinder 2 together with the air-fuel mixture in the chamber 17 . In this case, the intake reed valve 14 is closed.

As the piston 1 descends to the bottom dead center position as described above, new air-fuel mixture is fed into the chamber 17. Therefore, a portion of the air-fuel mixture in the crank chamber 3 is simultaneously fed into the cylinder 2 by the amount that the piston 1 has descended.

Next, in the compression stroke shown in FIG. Compress the air. At this time, as the piston 1 moves above the bottom dead center position, the volume below the piston 1 increases, and as the pressure in the crank chamber 3 decreases, the air supply reed pulp 13 is closed, and the other intake lead The valve 14 is opened and the air-fuel mixture is supplied into the crank chamber 3.

Turning to FIG. 3, the air-fuel mixture compressed as shown in FIG. 2 is ignited f8 using the ignition plug 6.

At this time, the intake valve 5 and the exhaust valve 7 remain closed, and the piston 1 descends as shown by the arrow due to the explosive force of the air-fuel mixture, and as the piston 1 descends to the bottom dead center position, the inside of the crank chamber 3 Since the air-fuel mixture is compressed and the pressure increases, the air supply reed pulp 13 opens and the air-fuel mixture is sent into the chamber 17 from the air pipe 8.

On the other hand, the intake reed valve 14 is closed.

Next, when moving to the exhaust stroke shown in FIG. 4, the exhaust valve 7 is opened, the piston 1 begins to rise from the bottom dead center position, and the combustion exhaust gas in the cylinder 2 is discharged from the exhaust hole 12 in the direction of the arrow. At this time, as the piston 1 rises, the pressure inside the crank chamber 3 decreases, so the air supply reed pulp 13 is closed, and the intake reed pulp 14 is opened, thereby supplying the air-fuel mixture into the crank chamber 3.

In this way, one cycle is completed with two rotations of the crank part 4, and the process returns to the suction stroke shown in FIG.
While opening the intake valve 5 provided at the top of the cylinder 2 and feeding the air-fuel mixture in the chamber 17 through the intake hole 11, part of the new air-fuel mixture to be supplied to the crank chamber 3 is also converted into lead pulp as shown in FIG. 13 into the cylinder 2 at the same time.

(Effects of the Invention) As described above, the present invention connects the intake pipe through which the air-fuel mixture is taken in to the crank chamber, communicates the crank chamber and the intake hole of the cylinder head via the air supply pipe, and connects the intake pipe with the intake pipe. Since each trachea is provided with a check valve, the following effects are produced.

(a) The mixture enters the crank chamber twice in one cycle, and this mixture is sucked into the cylinder during the intake stroke.
It is possible to feed 1.5 times the amount of air-fuel mixture into the cylinder at once compared to conventional engines, and by compressing and exploding this mixture, it is possible to extract approximately 1.5 times the output of conventional engines.

(b) Also, as mentioned above, the crank chamber and the upper part of the cylinder are connected and have a simple structure with a check valve, so there is no need to install a turbo charger, etc., and there are fewer failures and modification. The expenses and equipment costs are also low.

(c) Since it has a four-stroke cycle engine structure, it can be applied to automobiles, other power machinery, agricultural machinery, diesel engines, etc., and has a wide range of uses.

[Brief explanation of drawings]

FIG. 2 is an explanatory diagram showing an example of the engine stroke. 1... Piston 2... Cylinder 3... Crank chamber 4... Crank part 5... Intake valve 6...
・Spark plug 7...Exhaust valve 8...Air pipe 9
... Intake pipe 13 ... Air supply lead pulp 14 ... Intake lead pulp Patent applicant: Kenji Sakaki Representative: Patent attorney Katsuhiko Kajihara Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) In a four-stroke cycle engine, the intake pipe that sucks the air-fuel mixture is connected to the crank chamber, and the crank chamber and the intake hole of the cylinder head are communicated via an air pipe. A four-stroke cycle engine characterized by each having a check valve. (2) The four-stroke cycle engine according to claim 1, wherein the check valve is made of reed pulp.