JP7688615B2 - engine - Google Patents

Description

The present invention relates to an engine that compresses and combusts air and fuel introduced into a cylinder of a piston mechanism via an air intake mechanism and an exhaust mechanism, and obtains the resulting combustion and explosion as power.

Although various engines have been developed in the past, an engine with a highly efficient structure has not yet been developed that can instantly open the intake mechanism wide (open the intake opening wide) to instantly introduce a large amount of air into the cylinder of the piston mechanism, and then instantly close the opening to cut off the intake, compressing it together with the fuel for compression combustion or collision combustion, thereby increasing output, and that can smoothly and instantly introduce and cut off the air, for example, even if the opening area is increased to increase the amount of air introduced from the intake section or the pressure to be pumped is increased.

Furthermore, if it were possible to realize instantaneous and smooth intake and exhaust in this way, even if a two-stroke engine (two-cycle engine) could be made smaller than a four-stroke engine (four-cycle engine) and have more power and better acceleration, if it could instantly open and introduce a large amount of air even if the open period during intake was short, and could instantly switch to a closed state with pressure contact, sufficient intake, exhaust and scavenging could be achieved, resulting in an efficient engine with excellent durability and improved fuel efficiency. Furthermore, by installing two such two-stroke engines (two-cycle engines) side by side, an even better power mechanism could be realized, but this has not yet been developed.

In light of the current situation, the present invention has been made to solve the above problems, and aims to provide an engine with excellent practicality that can instantly open the intake mechanism wide (widen the opening of the intake section) to instantly introduce a large amount of air into the cylinder of the piston mechanism, and instantly close the opening to block the intake, compressing it together with the fuel for compression combustion or collision combustion, thereby increasing output, even if the opening area is increased to increase the amount of air introduced from the intake section or the pressure to pump it is increased, and can instantly and smoothly introduce and block the air, for example, even if the opening area is increased to increase the amount of air introduced from the intake section, and the pumping pressure is increased.

The gist of the present invention will be explained with reference to the attached drawings.

An engine in which air and fuel introduced into a cylinder 1 of a piston mechanism are compressed by a piston 2, combusted and exploded, or combusted and exploded by collision, and the force is transmitted as power, and an air intake section 3 that introduces air into the cylinder 1 is provided with an opening/closing switching mechanism 6 consisting of a number of openings 4 and an opening/closing section 5 that can be opened and closed to open and close the openings 4 all at once when the air is introduced, and all closed when the air is compressed and exploded, and this opening/closing switching mechanism 6 is composed of a fixed wall section 7 in which the number of openings 4 are provided, and a movable opening/closing wall section 5 as the opening/closing section 5 that is movably provided along the fixed wall section 7 and is provided with a number of communicating openings 8 that are in communication with the number of openings 4 when moved, and a closing section 9 that closes the number of openings 4 when moved, and When the opening/closing movable wall portion 5 is movable, the numerous communicating openings 8 are misaligned with the numerous openings 4, and the numerous openings 4 are all blocked at once by the blocking portion 9, and when the opening/closing movable wall portion 5 moves toward the fixed wall portion 7 as it moves, the opening/closing movable wall portion 5 is in a pressed state in which it is in pressure contact with the fixed wall portion 7. When switching from the closed state of this pressed state to an open state, when the opening/closing movable wall portion 5 is moved, the numerous communicating openings 8 are in communication with the numerous openings 4, and are in an open state, and when the opening/closing movable wall portion 5 moves away from the fixed wall portion 7 as it moves, the pressing state between the opening/closing movable wall portion 5 and the fixed wall portion 7 is released, and a pressure release state is achieved. The opening blocking switching mechanism 6 is configured as follows: The opening/closing movable wall portion 5 as the opening/closing portion 5 is provided along the fixed wall portion 7 so as to be freely rotatable and movable toward and away from the fixed wall portion 7 on the fixed wall portion 7 covering the cylinder communication opening 10 of the air supply portion 3, and a large number of slit-shaped openings 4 are provided in the fixed wall portion 7 in the circumferential direction, and the opening/closing movable wall portion 5 is provided with a large number of communication openings 8 which are communicated with the large number of openings 4 of the fixed wall portion 7 and set to the open state by rotating the opening/closing movable wall portion 5 along the fixed wall portion 7, and a blocking portion 9 which is rotatably moved so that the large number of communication openings 8 and the large number of openings 4 are misaligned and all of the openings 4 are blocked at once to set to the blocked state, and the opening/closing movable wall portion 5 is opened in synchronization with the movement of the piston 2, The opening/closing movable wall portion 5 is configured to rotate in the opening direction and move in a direction away from the fixed wall portion 7, thereby changing from the closed state in the pressed state in which it is pressed against the fixed wall portion 7 to the open state in the pressed-contact release state in which it is separated from the fixed wall portion 7 and the pressure is released, and by rotating the opening/closing movable wall portion 5 in the closing direction and moving in a direction approaching the fixed wall portion 7, it returns from the open state in the pressed-contact release state to the closed state in which it is pressed against the fixed wall portion 7, and the opening closing switching mechanism 6 is configured to be equipped with a rotation-linked pressure-contact release switching mechanism 12 consisting of a tapered surface 11 that moves the opening/closing movable wall portion 5 toward and away from the fixed wall portion 7 by rotating the opening/closing movable wall portion 5 forward and backward, thereby switching between being pressed against and released from the fixed wall portion 7 .

The opening/closing switching mechanism 6 relates to the engine described in claim 1, characterized in that the fixed wall portion 7 covering the cylinder communication opening 10 comprises an outer wall portion and an inner wall portion provided at a distance inside the outer wall portion, and a large number of the openings 4 are provided in communication with both the outer wall portion and the inner wall portion, and the opening/closing movable wall portion 5 as the opening/closing portion 5 is provided between the outer wall portion and the inner wall portion of the fixed wall portion 7 so as to be freely rotatable in the horizontal direction and freely move toward and away from each other in the vertical direction, and a large number of slit-shaped openings 4 are provided in the outer wall portion and the inner wall portion at intervals in the circumferential direction in an outer-inner communication state, and the opening/closing movable wall portion 5 is provided with the large number of openings 4 in the outer-inner communication state, and a large number of the communication openings 8 provided in a communication state between the large number of openings 4 in the outer-inner communication state, and the closing portion 9 that closes all of the large number of openings 4 at once by horizontally rotating the opening/closing movable wall portion 5 , alternately provided in the circumferential direction.

The rotation-linked pressure release switching mechanism 12 consisting of the tapered surface 11 is configured such that the tapered surface 11 is provided on the sliding surface between the outer wall portion or the inner wall portion of the fixed wall portion 7 and the opening/closing movable wall portion 5, and the opening/closing movable wall portion 5 is rotated forwards and backwards by the tapered surface 11 , thereby moving the opening/closing movable wall portion 5 toward and away from the fixed wall portion 7.

The engine according to claim 1 is characterized in that an exhaust section 13 is provided for exhausting post-combustion air from within the cylinder 1, and the exhaust section 13 is also provided with the opening blockage switching mechanism 6, and the opening blockage switching mechanism 6 of the intake section 3 and the opening blockage switching mechanism 6 of the exhaust section 13 are controlled to open and close to control the intake and exhaust of the cylinder 1.

Since the present invention is configured as described above, even if there is a restriction that the timing of the air intake is short (the opening period is short), the air intake mechanism can be instantly opened wide (the opening of the air intake section is opened wide) to instantly introduce a large amount of air into the cylinder of the piston mechanism, and the opening can be instantly closed to cut off the air intake, and the air can be compressed together with the fuel for compression combustion or collision combustion, thereby increasing output.In addition, even if the opening area is increased to increase the amount of air introduced from the air intake section or the pressure to pump the air is increased, the engine has a highly efficient structure that can instantly and smoothly introduce and cut off the air, and it can also realize an innovative two-stroke engine (two-cycle engine) that maintains the advantages of a two-stroke engine (two-cycle engine) while eliminating its disadvantages, making it an innovative engine with excellent practicality.

FIG. 1 is a schematic diagram illustrating a configuration of the present embodiment. FIG. 2 is a schematic plan view illustrating the configuration of the present embodiment in which both the intake section (left side) and the exhaust section (right side) of the main parts are closed during combustion and explosion. FIG. 1 is a schematic plan view illustrating the state in which the exhaust section (right side) of the main part of this embodiment is in the process of changing from a closed state to a fully open state after combustion and explosion. FIG. 2 is a schematic plan view illustrating the configuration of the exhaust section (right side) of the main part of this embodiment when it is fully open after combustion and explosion. This is a schematic plan view illustrating the configuration of the main part of this embodiment, in which the exhaust section (right side) is in the process of changing from a fully open state to a closed state after a combustion explosion, and the air intake section (left side) is in the process of changing from a closed state to a fully open state. FIG. 1 is a schematic plan view illustrating the configuration of a main part of this embodiment when the exhaust section (right side) is in a closed state and the intake section (left side) is in a fully open state. This is a front cross-sectional view illustrating the schematic configuration of the main parts of this embodiment, with the air intake section (left side) in a closed, pressed-contact state, and the exhaust section (right side) in a fully open state.

The optimal embodiment of the present invention will be briefly explained below, showing its function based on the drawings.

The present invention is an engine in which, for example, air introduced and fuel injected into a cylinder 1 of a piston mechanism are compressed, combusted, or collided, and exploded by the piston 2 of the piston mechanism, and the force is transmitted (obtained) as power, and the air intake section 3 that introduces air into the cylinder 1 is provided with an opening/closing switching mechanism 6 (opening/closing air intake mechanism) consisting of multiple openings 4 as an air intake port and an opening/closing section 5 that can be opened and closed as an air intake valve, which opens all of the multiple openings 4 at the same time when air is introduced, and closes them all at once when an explosion occurs.

The opening/closing switching mechanism 6 of the present invention is configured to include a fixed wall portion 7 on which a large number of the openings 4 are provided, and a movable opening/closing wall portion 5 as the opening/closing portion 5 that is movably provided along the fixed wall portion 7. The movable opening/closing wall portion 5 is configured to include a large number of communicating openings 8 that are movable to communicate with the large number of openings 4, and a closing portion 9 that is movable to close the large number of openings 4.

The present invention also provides a configuration in which the opening/closing movable wall portion 5 is movable, causing the numerous communication openings 8 to become misaligned with the numerous openings 4, resulting in a blocked state in which the numerous openings 4 are blocked simultaneously by the blocking portion 9, and the present invention also provides a configuration in which the opening/closing movable wall portion 5 is moved in a direction approaching the fixed wall portion 7 as it moves, causing the opening/closing movable wall portion 5 to be in a pressed contact state against the fixed wall portion 7.

In addition, the present invention is configured such that when switching from the closed pressed state to the open state, the opening/closing movable wall portion 5 is moved so that the numerous communication openings 8 are in communication with the numerous openings 4, resulting in an open state, and the opening/closing movable wall portion 5 moves away from the fixed wall portion 7 as it moves, resulting in a pressure release state in which the pressing state between the opening/closing movable wall portion 5 and the fixed wall portion 7 is released.

Therefore, for example, when air is introduced in sync with the movement of the piston 2, the movable opening and closing wall portion 5 is moved in one direction and moved away from the piston 2, allowing the valve to instantly go from the closed, pressed state to a fully open state smoothly, allowing a large amount of air to be introduced. At the same time, when the fuel is compressed or impinged and combusted, the valve can be moved toward the piston 2 and instantly return to the closed, pressed state, allowing the valve to withstand high combustion pressure and instantly and reliably prevent the combustion air from flowing back to the intake side.

Specifically, for example, in order to introduce and supply air into the cylinder 1 near the top dead center of the piston 2 in synchronization with the movement of the piston 2, the movable opening and closing wall portion 5 is moved in one direction from the closed state in which it is pressed against the fixed wall portion 7 and blocks air, and moves away from the fixed wall portion 7 to easily, smoothly and instantly enter the open state, allowing a large amount of air to be instantly introduced and supplied, and also, if an explosion occurs due to, for example, fuel injection or ignition, the combustion explosion pressure can be fully withstood.

In other words, in the event of an explosion, the opening/closing movable wall portion 5 is again moved toward the fixed wall portion 7, resulting in the closed state in which it is pressed against the fixed wall portion 7, and the opening/closing movable wall portion 5, which receives the explosive pressure during the explosion, can be received by the fixed wall portion 7, resulting in no leakage and excellent durability.

In addition, when moving from this closed pressed state to the open state again, the valve moves away from the opening, releasing the pressure and returning to the open state, so that the valve can be opened instantly and smoothly. For example, even an actuator with a small driving force can be used to open and close the valve, and while the valve is in a closed state that can fully withstand explosion pressure, it can be switched instantly and smoothly to the open state. It can also be designed for high output and produces clean exhaust gases.

In this way, the present invention can shift the communicating opening 8 of the opening/closing movable wall portion 5 relative to the opening 4 of the fixed wall portion 7, for example by rotating back and forth in synchronization with the piston 2 of the piston mechanism, thereby switching between a simultaneous closing state, a simultaneous opening state and a simultaneous closing state, and can again switch between the simultaneous opening state and the simultaneous closing state by performing this operation in the opposite direction.

In addition to this mobility, the opening and closing movable wall 5 is pressed against the fixed wall 7 when closed, and when opened, the pressure is released by separating them. This allows instantaneous switching between the simultaneous pressure-contact closed state, simultaneous pressure-contact release open state, and simultaneous pressure-contact closed state with little force, realizing smooth and reliable switching between the introduction and blocking of air supply, as well as the blocking and opening introduction due to the pressure-contact closed state that can withstand the pressure of a combustion explosion.

In other words, even in a configuration where the timing of air intake is restricted to a short opening period, such as in a two-stroke engine, the present invention can be configured, for example, with multiple slit-shaped openings 4, to instantly switch to an opening state with a large opening area with a simple operation and a short moving stroke, allowing a large amount of air to be introduced and supplied in an instant, and if, for example, a pressure-fed air intake mechanism is further provided, a large amount of air can be introduced in an even shorter period of time.

In addition, the present invention is configured such that when closed, the cylinder is in a pressed closed state and can fully withstand the pressure of combustion explosion, but when open, the pressed state is released by the separation movement, frictional resistance is reduced, and movement becomes easy, so that the state can be instantly switched to the open state. If a similar opening/closing switching mechanism 6 is provided in the exhaust section 13, exhaust can also be performed instantly within a short period of time, and if the intake opening 4 is also opened during exhaust, the inside of the cylinder 1 will also be scavenged by the intake air, and intake and exhaust can be performed even more instantly and smoothly, resulting in an efficient engine.

In this way, the present invention allows the total opening area of the opening 4 to be easily increased, and allows for a configuration that allows for a large amount of air to be supplied quickly, and for quick exhaust and scavenging to be performed easily, making it easy to improve the performance of the two-stroke engine. It is also easy to provide a supercharging mechanism (such as a pressure-fed air supply mechanism) in the air supply section 3, and by setting a long exhaust period, it is also possible to realize a Miller-Atkinson cycle.

Specific examples of the present invention will be described with reference to the drawings.

In this embodiment, the air that is pumped into the cylinder 1 of the piston mechanism by, for example, a pressure-feed air supply mechanism and the injected fuel are compressed and combusted by the piston 2, and the engine (internal combustion engine) can burn without an ignition device and transmits the force of this combustion and explosion as motive power, and the present invention is applied to a two-stroke engine.

In other words, while various configurations can be used for the engine, in this embodiment, a piston 2 that moves up and down is provided in the cylinder 1, and air is introduced from the air intake section 3 by the up and down reciprocating motion of this piston 2. In this embodiment, air is introduced and supplied by a pressurized air supply mechanism, and this pressurized air collides with and burns fuel injected into the cylinder 1 from the fuel injection section, and the fuel is compressed and combusted by the piston 2, and the force of the combustion explosion is obtained as power via the piston 2, and after combustion, exhaust gas is discharged from the exhaust section 13. This invention is applied to a two-stroke gasoline engine.

Specifically, in this embodiment, the air supply section 3 is provided with an opening/closing switching mechanism 6 consisting of a number of slit-shaped openings 4 and an opening/closing section 5 that can be freely opened and closed, which opens all of the openings 4 at once when the air is introduced and closes them all at once when the air is compressed and exploded.

The opening/closing switching mechanism 6 in this embodiment is configured to include a fixed wall portion 7 on which a large number of the openings 4 are provided, and a movable opening/closing wall portion 5 that is movably provided along the fixed wall portion 7 as the opening/closing portion 5. The movable opening/closing wall portion 5 is configured to include a large number of communicating openings 8 that are movable to communicate with the large number of openings 4, and a closing portion 9 that is movable to close the large number of openings 4.

In this embodiment, by moving the opening/closing movable wall portion 5, the multiple communication openings 8 are misaligned with the multiple openings 4, and the multiple openings 4 are all blocked by the blocking portion 9 at the same time, and the opening/closing movable wall portion 5 moves toward the fixed wall portion 7 as it moves, so that the opening/closing movable wall portion 5 is in a pressed state against the fixed wall portion 7. When switching from the closed state of this pressed state to an open state, the opening/closing movable wall portion 5 is moved, so that the multiple communication openings 8 are in a communicating state with the multiple openings 4, so that all are open, and the opening/closing movable wall portion 5 moves away from the fixed wall portion 7 as it moves, so that the pressed state between the opening/closing movable wall portion 5 and the fixed wall portion 7 is released, so that the pressure-released state is achieved.

To explain further, the opening/closing switching mechanism 6 of this embodiment is configured such that the opening/closing movable wall portion 5 as the opening/closing portion 5 is rotatable along the fixed wall portion 7 covering the cylinder communication opening 10 of the air supply portion 3, and is freely movable toward and away from the fixed wall portion 7. The fixed wall portion 7 is provided with a large number of slit-shaped openings 4 in the circumferential direction, and the opening/closing movable wall portion 5 is configured to have a large number of communicating openings 8 that are in communication with the large number of openings 4 of the fixed wall portion 7 and in the open state when the opening/closing movable wall portion 5 is rotated along the fixed wall portion 7, and a closing portion 9 that is rotated to shift the position of the large number of communicating openings 8 and the large number of openings 4 and close all of the openings 4 at once, and is alternately provided in the circumferential direction.

Furthermore, in this embodiment, the opening/closing movable wall portion 5 is rotated in the opening direction and moves away from the fixed wall portion 7 in synchronization with the movement of the piston 2, thereby changing from the closed state of the pressed state in which it is pressed against the fixed wall portion 7 to the open state of the pressed-off state in which it is moved away from the fixed wall portion 7 and the pressure is released, and the opening/closing movable wall portion 5 is rotated in the closing direction and moves toward the fixed wall portion 7, returning from the open state of the pressed-off state to the closed state of the pressed state in which it is pressed against the fixed wall portion 7.

To explain further, the opening closure switching mechanism 6 in this embodiment is configured to include a rotation-linked pressure release switching mechanism 12 consisting of a tapered surface 11 that moves the opening/closing movable wall portion 5 toward or away from the fixed wall portion 7 by rotating the opening/closing movable wall portion 5 horizontally in the forward or reverse direction, thereby switching between being pressed against or released from the fixed wall portion 7.

Furthermore, in the opening closure switching mechanism 6 of this embodiment, the disk-shaped fixed wall portion 7 covering the cylinder communication opening 10 of the air supply portion 3 is configured to be composed of a disk-shaped outer wall portion and a disk-shaped inner wall portion spaced apart inside the disk-shaped outer wall portion, and a large number of slit-shaped openings 4 are radially spaced apart in both the outer wall portion and the inner wall portion in a communicating state, and the disk-shaped opening/closing movable wall portion 5 as the opening/closing portion 5 is provided between the outer wall portion and the inner wall portion of the fixed wall portion 7 so as to be freely rotatable in the horizontal direction around the central axis and to be able to move slightly closer and farther away in the vertical direction, and a large number of the openings 4 are provided in the outer wall portion and the inner wall portion in a radially long slit-like shape spaced apart in the circumferential direction in an outside-inside communicating state (vertically facing state).

That is, the disk-shaped movable wall portion 5 for opening and closing has a configuration in which the numerous openings 4 in the outside-inside communication state, the numerous communication openings 8 provided at positions communicating with the upper and lower openings 4 between them, and the closing portions 9 that close all of the numerous openings 4 at once by horizontally rotating the movable wall portion 5 for opening and closing, are alternately provided in the circumferential direction.

In addition, this embodiment is provided with a rotation-linked pressure release switching mechanism 12 consisting of a tapered surface 11 that automatically moves the opening/closing movable wall portion 5 toward or away from the wall portion 5 in the vertical direction by rotating the opening/closing movable wall portion 5 horizontally.

Specifically, the tapered surface 11 is provided on the sliding surface between the inner wall part at the bottom of the fixed wall part 7 and the lower part of the opening/closing movable wall part 5, and when the opening/closing movable wall part 5 rotates horizontally, the opening/closing movable wall part 5 climbs up and rises slightly, so that it presses against the outer wall part of the upper fixed wall part 7. When the opening/closing movable wall part 5 rotates forward and backward, the tapered surface 11 moves the opening/closing movable wall part 5 toward and away from the outer wall part at the top of the fixed wall part 7.

In this embodiment, the exhaust section 13, which exhausts post-combustion air from within the cylinder 1, is also equipped with the opening blockage switching mechanism 6, and the opening blockage switching mechanism 6 of the intake section 3 and the opening blockage switching mechanism 6 of the exhaust section 13 are separately controlled to open and close, thereby controlling the intake and exhaust of the cylinder 1.

Specifically, as described above, a number of slit-shaped openings 4 are provided in both the upper outer wall and lower wall of the disk-shaped fixed wall 7 at intervals in the circumferential direction, in a state where they communicate with each other (at opposing positions where they communicate with each other), and when the communication openings 8 of the opening/closing movable part 5 that rotates horizontally between them are in a connected open state, they communicate with the communication openings 10 inside the cylinder, and the air supply part 3 is in an open state. The opening/closing movable wall part 5 that is freely rotatable and can move up and down between the upper outer wall part and the lower inner wall part of the fixed wall part 7 is provided with a number of similarly slit-shaped communication openings 8 that communicate with the multiple openings 4 that are in a vertically connected state and are in the open state, and when it rotates horizontally, the multiple communication openings 8 are displaced, and the multiple openings 4 are simultaneously blocked by the blocking parts 9 between the communication openings 8, and are in the closed state. Heat-resistant grease, labyrinth packing, etc. are provided in various places to seal.

As described above, in this embodiment, the opening/closing movable wall portion 5 is horizontally rotated in one direction in synchronization with the movement of the piston 2, and the rotation-linked pressure release switching mechanism 12, which is made of the tapered surface 11 that gradually slopes upward in this rotation direction, gradually moves closer to the outer wall portion of the upper part of the fixed wall portion 7 and presses against it to create the closed state of the pressed state. By horizontally rotating the opening/closing movable wall portion 5 in the opposite direction, it gradually moves away from the outer wall portion of the upper part of the fixed wall portion 7 so as to descend, and the pressed state is released, and the closed state of the pressed state is smoothly and instantly changed to the fully open state. Then, by moving closer to the inner wall portion of the lower part and pressing against it, the structure is configured to withstand air pressure in the open state.

Specifically, in order to introduce and supply the compressed air into the cylinder 1, for example, near the top dead center of the piston 2 in synchronization with the movement of the piston 2, the movable wall portion 5, which is in pressure contact with the inner wall portion of the fixed wall portion 7 and receives the compressed air pressure, is rotated in one direction from the open state of the pressurized state in which the movable wall portion 5 is in pressure contact with the inner wall portion, and the rotating-linked pressure contact release switching mechanism 12 consisting of the tapered surface 11 moves away from the inner wall portion and moves toward the outer wall portion to the closed state in a pressure contact state in which the compressed air is forcibly supplied and receives the compressed air pressure from the supply air, and even when the compressed air explodes due to the injection of fuel and receives the explosion pressure, the pressure contact state can withstand this pressure. Furthermore, when the movable wall portion 5 is opened or closed, it automatically moves away from the inner wall portion and the pressure contact state is released, allowing the movable wall portion 5 to open and close smoothly and instantly open wide all at once, and instantly return to the closed state of the pressurized state all at once.

That is, for example, when the compressed air is introduced into the cylinder 1 (when supplying compressed air), the movable opening and closing wall part 5 is rotated in one direction from the pressed closed state, and automatically moves away from the fixed wall part 7 to the open state. When the opening movement is performed, the pressed state is released, eliminating friction, and the rotation movement for opening can be performed instantly, smoothly, and easily.

In this embodiment, the opening is pressed against the inner wall of the fixed wall 7 on the opposite side even in this open state, so the structure is capable of withstanding the air pressure during air supply.

Furthermore, by rotating it in the opposite direction, it can be instantly closed again and can be put into a pressure-welded closed state, making it capable of withstanding the explosive pressure of combustion.

As a result, even though it has a structure that allows for pressure sealing, it can be opened and closed using an actuator with a small driving force, and can be designed for high output and produces clean exhaust gases.

In this embodiment, the opening/closing drive unit (rotating actuator) that rotates the opening/closing movable wall portion 5 of the opening/closing switching mechanism 6 horizontally between the outer wall portion and the inner wall portion of the fixed wall portion 7, and the pressure contact/separation drive unit (vertical movement actuator) that moves the opening/closing movable wall portion toward and away from the outer wall portion and the inner wall portion may be provided, but the opening/closing drive unit (rotating actuator) only moves the rotating lever provided on the opening/closing movable wall portion 5 back and forth using a cam mechanism or the like, and this rotation automatically moves the tapered surface 11 of the rotation-linked pressure contact/release switching mechanism 12 upward and downward due to the action of the tapered surface, thereby switching between pressure contact and release.

As mentioned above, in this embodiment, a pressure storage tank that compresses the air compressed by the air compression unit into the cylinder 1 is provided in the air supply path, so that a large amount of compressed air can be obtained with a small force, although there is loss due to heat loss. Also, an exhaust gas heat exchange unit is provided in this path, which heats the compressed air by exchanging heat with the exhaust gas exhausted from the cylinder 1 after combustion. As a result, for example, air compressed by a compressor provided as the air compression unit is compressed in a state close to isothermal compression like a normal compressor, and more compressed air can be obtained with the same amount of work compared to adiabatic compression, and by providing heat through heat exchange with the exhaust gas, it is expanded isobarically, functioning as a kind of external combustion engine and improving the overall thermal efficiency.

For example, the cross section of the numerous openings 4 and numerous communicating openings 8 that are connected to act as open air intakes to introduce air into the cylinder 1 may be formed to have an opening cross-sectional shape that has little air inflow resistance in the air intake direction, but has a large air inflow resistance in the opposite direction to the backflow that occurs during combustion and explosion. That is, for example, the openings may be formed in a streamlined shape such that the upper side, which is the air intake side, is large, and the opening diameter gradually decreases toward the inside, with the openings on the lower side becoming smaller.

The present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

REFERENCE SIGNS LIST 1 Cylinder 2 Piston 3 Air supply section 4 Opening section 5 Opening/closing section, movable wall section for opening/closing 6 Opening/closing switching mechanism 7 Fixed wall section 8 Communication opening section 9 Closing section
10 Cylinder communication opening
11 Tapered surface
12 Rotation-linked pressure release switching mechanism
13 Exhaust section

Claims (4)

An engine in which air and fuel introduced into a cylinder of a piston mechanism are compressed by a piston, combusted and exploded, or combusted and exploded by collision, and the resulting force is used as power to transmit the engine,
an air supply section for introducing air into the cylinder is provided with an opening/closing switching mechanism consisting of a number of openings and an opening/closing section which can be freely opened and closed to open and close all of the openings at the time of introduction and close all of the openings at the time of compression and explosion,
This opening closure switching mechanism includes a fixed wall portion in which the multiple openings are provided, and a movable opening/closing wall portion as the opening/closing portion that is movably provided along the fixed wall portion and has multiple communication openings that are in communication with the multiple openings when moved, and a closing portion that closes the multiple openings when moved,
When this opening/closing movable wall portion is movable, the multiple communicating openings become misaligned with the multiple openings, resulting in a closed state in which the multiple openings are all blocked simultaneously by the blocking portion, and when this opening/closing movable wall portion moves toward the fixed wall portion as it moves, it becomes a pressed state in which it is pressed against the fixed wall portion, and when switching from the pressed closed state to an open state, when the opening/closing movable wall portion is moved, the multiple communicating openings become in communication with the multiple openings, resulting in an open open state, and when the opening/closing movable wall portion moves away from the fixed wall portion as it moves, it becomes a pressed released state in which the pressed state between the opening/closing movable wall portion and the fixed wall portion is released ,
the opening closure switching mechanism is configured such that the opening/closing movable wall portion as the opening/closing portion is provided on the fixed wall portion covering the cylinder communication opening of the air supply portion and is rotatable along the fixed wall portion so as to be movable toward and away from the fixed wall portion,
The fixed wall portion is provided with a large number of slit-shaped openings in a circumferential direction,
the opening/closing movable wall portion is provided with a number of communicating openings that are in a communicating state with the number of openings in the fixed wall portion by rotating the opening/closing movable wall portion along the fixed wall portion to achieve the open state, and a closing portion that is in a circumferentially alternating state with the number of communicating openings and the number of openings by rotating the opening/closing movable wall portion, so that the number of communicating openings and the number of openings are misaligned and all of the openings are simultaneously closed to achieve the closed state,
In synchronization with the movement of the piston, the opening/closing movable wall portion is rotated in an opening direction and moves away from the fixed wall portion, thereby changing from the closed state of the pressed state in which it is pressed against the fixed wall portion to the open state of the pressed-off state in which it is moved away from the fixed wall portion and the pressure is released, and the opening/closing movable wall portion is rotated in a closing direction and moves toward the fixed wall portion, thereby returning from the open state of the pressed-off state to the closed state of the pressed state in which it is pressed against the fixed wall portion,
The engine is characterized in that the opening closure switching mechanism is equipped with a rotation-linked pressure-contact release switching mechanism consisting of a tapered surface that moves the opening/closing movable wall portion toward or away from the fixed wall portion by rotating the opening/closing movable wall portion forward or backward, thereby switching between being pressed against or released from the fixed wall portion . The opening closure switching mechanism is configured such that the fixed wall portion covering the cylinder communication opening portion includes an outer wall portion and an inner wall portion provided inside the outer wall portion at a distance therefrom, and a large number of the opening portions are provided in communication with both the outer wall portion and the inner wall portion,
Between the outer wall portion and the inner wall portion of the fixed wall portion, the opening/closing movable wall portion as the opening/closing portion is provided so as to be rotatable in the horizontal direction and movable toward and away from each other in the vertical direction, and a large number of slit-shaped openings are provided at intervals in the circumferential direction in the outer wall portion and the inner wall portion so as to communicate with the outer side and the inner side,
2. The engine according to claim 1, wherein the opening/closing movable wall portion is provided with a plurality of the openings in the outer-inner communicating state, a plurality of the communicating openings provided in a communicating state between them, and a closing portion that closes all of the plurality of openings at once by horizontally rotating the opening/closing movable wall portion, which are alternately provided in a circumferential direction. 3. The engine according to claim 2, characterized in that the rotation-linked pressure release switching mechanism consisting of the tapered surface is provided on a sliding surface between the outer wall portion or the inner wall portion of the fixed wall portion and the opening/closing movable wall portion, and the opening/closing movable wall portion is rotated forwards and backwards by the tapered surface, thereby moving the opening/closing movable wall portion toward and away from the fixed wall portion.
The engine according to claim 1, characterized in that an exhaust section is provided for exhausting post-combustion air from within the cylinder, and the exhaust section is also provided with the opening blockage switching mechanism, and the intake and exhaust within the cylinder are controlled by controlling the opening and closing of the intake section's opening blockage switching mechanism and the exhaust section's opening blockage switching mechanism.

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