JP4927157B2 - Hybrid engine - Google Patents

Description

  The present invention relates to an improvement in an engine having a piston mechanism.

  2. Description of the Related Art Conventionally, an internal combustion engine that converts thermal energy generated by burning an air-fuel mixture in a combustion chamber into kinetic energy and outputs the kinetic energy is known. The air-fuel mixture, which is an energy source of the internal combustion engine, is a mixture of air and fuel. For this fuel, oil (for example, gasoline) or natural gas, which is fossil fuel, is usually used.

  Patent Document 1 listed below discloses an engine having an internal combustion engine configured by a piston mechanism that operates by combustion of combustion gas and a steam engine configured by a piston mechanism that operates by using the pressure of water vapor. . And this patent document 1 describes that the thermal efficiency of an engine improves by generating the water vapor | steam supplied to a steam engine using the exhaust heat of an internal combustion engine.

  Patent Document 2 below discloses a pneumatic piston engine that outputs kinetic energy by moving a piston by pressure energy of compressed air supplied into an operation chamber.

JP 2006-200476 A JP-T-2004-534173

  Conventional internal combustion engines have been used in various devices such as automobiles as prime movers that generate kinetic energy. However, in recent years, devices such as electric vehicles and hybrid vehicles using a motor driven by electric power as a prime mover have been increasing against the background of an increase in movement to suppress carbon dioxide emissions to prevent global warming. .

  In this way, if the prime mover of the apparatus shifts from an internal combustion engine driven by fossil fuel to a motor driven by electric power, the carbon dioxide emission during operation of the apparatus is reduced, and thus the viewpoint of preventing global warming Then, deterioration of the global environment can be suppressed. However, simply changing the model of the prime mover consumes limited earth resources, so the global environment is deteriorated from the viewpoint of resource conservation. Moreover, since the entire apparatus must be changed with the change of the model of the prime mover, there is a problem that costs are increased.

  One of the objects of the present invention is to provide an engine that uses a piston mechanism of an internal combustion engine and can drive an internal combustion engine driven by fossil fuel with an energy source different from that of the fuel. is there.

  Another object of the present invention is to provide an engine that uses the piston mechanism of the internal combustion engine and can drive the internal combustion engine with one of fossil fuel and an energy source different from the fuel at low cost. It is to provide.

Furthermore, a hybrid engine according to another invention is a piston mechanism of an internal combustion engine that converts thermal energy generated by burning an air-fuel mixture in a combustion chamber into kinetic energy and outputs it, and air for generating the air-fuel mixture in the combustion chamber. Air supply source to supply, pressure gas supply source to supply pressure gas to the combustion chamber, and provided at the end of the passage leading to the combustion chamber formed in the piston mechanism, connected to the air supply source and the pressure gas supply source, respectively The intermediate connector includes a switching valve that selectively communicates the passage and one of the two supply sources, and the pressure gas supply source communicates with the passage by the switching valve. If it is, the piston mechanism, and converts the pressure energy of pressure gas supplied to the combustion chamber from the pressure gas source to the kinetic energy, the air supply source is introduced from the outside Includes a throttle valve for adjusting the flow rate of air, the pressure gas source, characterized in that it is a compressor that generates compressed air which is compressed gas is compressed air.

  According to the engine of the present invention, an internal combustion engine that is driven by fossil fuel can be driven by an energy source different from that of the fuel using the piston mechanism of the internal combustion engine and at low cost.

  Further, according to the engine of another invention, the internal combustion engine can be driven by one of the fossil fuel and the energy source different from the fuel by using the piston mechanism of the internal combustion engine and at low cost.

It is a figure which shows the structure of the engine which concerns on this embodiment. It is a figure which shows the structure of the engine which concerns on another embodiment. It is a figure which shows the structure of a pressure gas engine. It is a figure which shows the state of a piston mechanism in case a crankshaft rotates forward. It is a figure which shows the state of a piston mechanism in case a crankshaft rotates reversely.

  Hereinafter, embodiments of an engine according to the present invention will be described with reference to the drawings. As an example, an engine mounted on a vehicle will be described, and this engine will be described. The present invention can be applied not only to an engine mounted on a vehicle but also to an engine mounted on another moving body or a prime mover used for other purposes.

  FIG. 1 is a diagram illustrating a configuration of an engine 10 according to the present embodiment. The engine 10 includes an internal combustion engine 14 that converts thermal energy generated by burning the air-fuel mixture in the combustion chamber 12 into kinetic energy and outputs the kinetic energy. The internal combustion engine 14 of the present embodiment is a spark ignition internal combustion engine that burns the air-fuel mixture in the combustion chamber 12 by igniting it with a spark plug 16. However, the present invention is not limited to this configuration, and the internal combustion engine 14 may be a compression ignition internal combustion engine.

  The internal combustion engine 14 has a piston mechanism 17. The piston mechanism 17 includes a piston 18, a cylinder 20 in which the piston 18 reciprocates, and a crankshaft 24 that is connected to the piston 18 via a connecting rod 22 and converts the reciprocating motion of the piston 18 into rotational motion. The cylinder 20 is provided with an ignition plug 16 as an ignition device for igniting the air-fuel mixture in the combustion chamber 12 inside the cylinder 20.

  The piston mechanism 17 has an intake port 26 and an exhaust port 28 that communicate with the combustion chamber 12 and are intake and exhaust passages in the combustion chamber 12. The intake port 26 is provided with a fuel injection valve 30 for injecting fuel. Here, the fuel is a fossil fuel such as gasoline or natural gas.

  The cylinder 20 is provided with an intake valve 32 for opening and closing the intake port 26 and an exhaust valve 34 for opening and closing the exhaust port 28. The intake and exhaust valves 32 and 34 are opened and closed by driving a valve system 36 composed of cams, valve springs, and the like. When the internal combustion engine 14 is driven by the air-fuel mixture, the valve system 36 of the present embodiment operates the intake and exhaust valves 32 and 34 so that four strokes and one cycle are achieved. However, the present invention is not limited to this configuration, and the valve system 36 can also operate the intake and exhaust valves 32 and 34 so as to have two strokes and one cycle.

  The engine 10 in the present embodiment has a connector 38 provided at the end of the intake port 26. The connector 38 is connected to a pressure gas supply source 40 that supplies pressure gas to the combustion chamber 12. The pressure gas is a gas having a pressure higher than atmospheric pressure, and is compressed air or water vapor. The pressure gas supply source 40 is a device that generates these gases, such as a compressor or a steam generator (for example, a boiler).

  Operation | movement of the piston mechanism 17 of the engine 10 comprised in this way is demonstrated. In this operation, it is preferable to operate the intake and exhaust valves 32 and 34 so that the valve system 36 changes from one 4-stroke cycle to two-stroke one cycle of the intake stroke and the exhaust stroke. Specifically, the timing of opening and closing each valve can be changed by changing from a 4-stroke cam to a 2-stroke cam. That is, by changing to a two-stroke cam, the intake valve 32 is closed and the exhaust valve 34 is closed during the exhaust stroke so that the intake valve 32 is open and the exhaust valve 34 is closed during the intake stroke. The timing is changed so that 34 is open. In this operation, the fuel injection valve 30 and the spark plug 16 are stopped because the combustion of the air-fuel mixture in the combustion chamber 12 is not required.

  The pressure gas introduced into the intake port 26 from the pressure gas supply source 40 is sucked into the combustion chamber 12 when the intake valve 32 is opened. The linear motion of the piston 18 due to the pressure to expand the pressure gas sucked into the combustion chamber 12 is converted into rotational motion by the crankshaft 24. That is, in the internal combustion engine 14, the pressure energy by the pressure gas is converted into kinetic energy. The pressure gas that has become low pressure due to the expansion of the volume becomes exhaust, is discharged when the exhaust valve 34 is opened, and is discharged to the outside through the exhaust port 28. Thus, when the pressure gas supply source 40 and the piston mechanism 17 of the internal combustion engine 14 are connected via the connector 38, the engine 10 functions as a pneumatic engine or a steam engine. Here, since the pneumatic engine or the steam engine is an engine that both outputs pressure energy converted into kinetic energy by the operation of the piston mechanism 17, these engines are hereinafter referred to as a pressure gas engine.

  According to the engine 10 of this embodiment, that is, the pressure gas engine, the internal combustion engine 14 can be driven by a pressure gas that is an energy source different from the energy source (fossil fuel) normally used for the internal combustion engine 14. As described above, by adopting a structure that can supply the internal combustion engine 14 with an energy source different from fossil fuel, it is possible to perform an operation that reduces carbon dioxide emissions, that is, an operation that does not use fossil fuel. It can contribute to the conservation of the global environment in terms of prevention. Further, by using the piston mechanism 17 of the existing internal combustion engine 14 as it is, the consumption of resources due to the change of the model of the prime mover is prevented, so that it is possible to contribute to the conservation of the global environment from the viewpoint of resource conservation.

  Next, an engine 10 having a structure capable of selectively supplying a plurality of different energy sources to the piston mechanism 17 of the internal combustion engine 14, that is, a hybrid engine will be described.

  The connector 38 of the present embodiment is detachable from an intake pipe (not shown) through which air flows, and is detachable from a pressure gas pipe (not shown) through which pressure gas flows. To do. The connector 38 has a flange 38a. The flange 38a and a flange (not shown) of an intake pipe or a pressure gas pipe are brought into contact with each other with a packing and fastened by a fastening member, so that the connector 38 and the intake pipe or the pressure gas pipe can be attached and detached. Connected.

  When the intake pipe is connected to the connector 38, the engine 10 functions as a spark ignition internal combustion engine. Hereinafter, the operation of the engine 10 in this case will be described.

  The air introduced into the intake port 26 through the intake pipe by the operation of the piston 18 is mixed with the fuel injected by the fuel injection valve 30 to become an air-fuel mixture, and the combustion chamber is opened as the intake valve 32 is opened. 12 is inhaled. The air-fuel mixture sucked into the combustion chamber 12 is ignited by an electric spark generated from the spark plug 16 and explosively burns. The linear motion of the piston 18 accompanying the explosion combustion is converted into rotational motion by the crankshaft 24. That is, in the internal combustion engine 14, the heat energy generated by the combustion of the air-fuel mixture is converted into kinetic energy. The combusted air-fuel mixture becomes exhaust gas, is discharged when the exhaust valve 34 is opened, and is discharged to the outside through the exhaust port 28. Thus, when the intake pipe is connected to the connector 38, the engine 10 functions as a spark ignition internal combustion engine.

  When the pressure gas pipe is connected to the connector 38, the engine 10 functions as a pressure gas engine. Since the operation of the pressure gas engine has been described above, a detailed description thereof will be omitted.

  As described above, the engine 10 of the present embodiment is a hybrid engine that is driven by a plurality of different energy sources, that is, an air-fuel mixture containing fossil fuel and a pressure gas. According to this hybrid engine, the internal combustion engine 14 can be driven by the fossil fuel, that is, the piston mechanism 17 can be operated with a simple structure and a low cost of providing a connector that can be connected to a plurality of different energy sources. The internal combustion engine 14 can be driven by pressure gas, that is, the piston mechanism 17 can be operated. In this way, the structure that can selectively supply a plurality of different energy sources to the piston mechanism 17 of the internal combustion engine 14 is used, so that an operation that reduces carbon dioxide emissions, that is, fossil fuel is used as necessary. This makes it possible to contribute to the conservation of the global environment from the viewpoint of preventing global warming. Further, by using the piston mechanism 17 of the existing internal combustion engine 14, the consumption of resources due to the change of the model of the prime mover is prevented, so that it can contribute to the conservation of the global environment from the viewpoint of resource conservation.

  Next, an engine 110 according to another embodiment will be described with reference to FIG. FIG. 2 is a diagram illustrating a configuration of the engine 110 according to another aspect. The engine 110 is also a hybrid engine having a structure capable of selectively supplying a plurality of different energy sources to the piston mechanism 17 of the internal combustion engine 14 as described above. In addition, the same code | symbol is attached | subjected about the same component as the said embodiment, and detailed description is abbreviate | omitted.

  The engine 110 according to this embodiment includes a pressure gas supply source 40 that supplies pressure gas to the combustion chamber 12 and an air supply source 42 that supplies air to the combustion chamber 12. The pressure gas supply source 40 is a compressor when the pressure gas is compressed air, and is a steam generator (for example, a boiler) when the pressure gas is steam. The pressure gas supply source 40 supplies the pressure gas generated by these devices to the combustion chamber 12 of the internal combustion engine 14. The air supply source 42 has a filter for filtering air and a throttle valve (both not shown) for adjusting the flow rate of air, and the air taken in from the outside is passed through these members to the combustion chamber 12 of the internal combustion engine 14. To supply.

  The engine 110 has an intermediate connector 44 connected to the connector 38. The connector 38 and the intermediate connector 44 are detachably connected by abutting the flange 38a of the connector 38 and the intermediate connector 44a with the packing therebetween and fastening them with a fastening member such as a bolt. In the present embodiment, the case where the intermediate connector 44 is connected to the connector 38 has been described. However, the present invention is not limited to this configuration, and the intermediate connector 44 is directly connected to the end of the intake port 26 without using the connector 38. It may be provided.

  The intermediate connector 44 is connected to the pressure gas supply source 40 and the air supply source 42, respectively. Specifically, the intermediate connector 44, the pressure gas supply source 40, and the air supply source 42 are connected to each other via an intake pipe and a pressure gas pipe as in the above-described embodiment.

  The intermediate connector 44 in this embodiment has a switching valve that selectively communicates the intake port 26 with one of the two supply sources 40 and 42. The switching valve has a two-way valve structure, and includes a pressure gas system valve 46 that controls the flow of pressure gas, and an air system valve 48 that controls the flow of air. The pressure gas system valve 46 is opened and closed by driving the actuator 46a, and the air system valve 48 is opened and closed by driving the actuator 48a. In addition, although the switching valve of this embodiment demonstrated the case where it was a two-way valve structure, it is not limited to this structure. As long as the intake port 26 and one of the two supply sources 40 and 42 can be selectively communicated with each other, the switching valve may have a three-way valve structure that can be switched by one valve body.

  The operation of the engine 110 of this embodiment will be described separately for the case where the engine 110 functions as a spark ignition internal combustion engine and the case where it functions as a pressure gas engine.

  First, the case where the engine 110 functions as a spark ignition internal combustion engine will be described. The air supply source 42 and the intake port 26 are communicated with each other by a switching valve of the intermediate connector 44. That is, the air system valve 48 is opened and the pressure gas system valve 46 is closed. The air introduced into the intake port 26 from the air supply source 42 through the intake pipe by the operation of the piston 18 is mixed with the fuel injected by the fuel injection valve 30 to become an air-fuel mixture, and the intake valve 32 is opened. As a result, it is sucked into the combustion chamber 12. The air-fuel mixture sucked into the combustion chamber 12 is ignited by an electric spark generated from the spark plug 16 and explosively burns. The linear motion of the piston 18 accompanying the explosion combustion is converted into rotational motion by the crankshaft 24. That is, in the internal combustion engine 14, the heat energy generated by the combustion of the air-fuel mixture is converted into kinetic energy. The combusted air-fuel mixture becomes exhaust gas, is discharged when the exhaust valve 34 is opened, and is discharged to the outside through the exhaust port 28. As described above, when the air supply source 42 and the intake port 26 are communicated with each other by the switching valve of the intermediate connector 44, the engine 110 functions as a spark ignition internal combustion engine.

  Next, the case where the engine 110 functions as a pressure gas engine will be described. In this operation, since the combustion of the air-fuel mixture in the combustion chamber 12 is not required, the fuel injection valve 30 and the spark plug 16 are stopped.

  The pressure gas supply source 40 and the intake port 26 are communicated with each other by a switching valve of the intermediate connector 44. That is, the pressure gas system valve 46 is opened and the air system valve 48 is closed. The pressure gas introduced into the intake port 26 from the pressure gas supply source 40 via the pressure gas pipe is sucked into the combustion chamber 12 when the intake valve 32 is opened. The linear motion of the piston 18 due to the pressure to expand the pressure gas sucked into the combustion chamber 12 is converted into rotational motion by the crankshaft 24. That is, in the internal combustion engine 14, the pressure energy by the pressure gas is converted into kinetic energy. The pressure gas that has become low pressure due to the expansion of the volume becomes exhaust, is discharged when the exhaust valve 34 is opened, and is discharged to the outside through the exhaust port 28. As described above, when the pressure gas supply source 40 and the intake port 26 are communicated with each other by the switching valve of the intermediate connector 44, the engine 110 functions as a pressure gas engine.

  According to the engine 110 of the present embodiment, the internal combustion engine 14 is driven by fossil fuel, that is, the piston mechanism 17 is operated, with a simple structure in which a connector having a switching mechanism is connected to each of a plurality of different energy sources. In addition, the internal combustion engine 14 can be driven by pressure gas, that is, the piston mechanism 17 can be operated. In this way, the structure that can selectively supply a plurality of different energy sources to the piston mechanism 17 of the internal combustion engine 14 is used, so that an operation that reduces carbon dioxide emissions, that is, fossil fuel is used as necessary. This makes it possible to contribute to the conservation of the global environment from the viewpoint of preventing global warming. Further, by using the piston mechanism 17 of the existing internal combustion engine 14, the consumption of resources due to the change of the model of the prime mover is prevented, so that it can contribute to the conservation of the global environment from the viewpoint of resource conservation.

  In the two embodiments described above, the case where the fuel injection valve 30 is provided in the intake port 26 has been described. However, the present invention is not limited to this configuration. When the hybrid engine 10 functions as a spark ignition internal combustion engine, if the air-fuel mixture can be supplied into the combustion chamber 12, the fuel injection valve 30 is provided further upstream from the intake port 26, for example, in the intake pipe. May be.

  Next, another embodiment of the pressure gas engine will be described with reference to FIG. FIG. 3 is a diagram showing the configuration of the pressure gas engine 50. In addition, the same code | symbol is attached | subjected about the same component as the said embodiment.

  The pressure gas engine 50 is an engine that converts pressure energy into kinetic energy and outputs the kinetic energy. The pressure gas engine 50 has a piston mechanism 17. The piston mechanism 17 includes a piston 18, a cylinder 20 in which the piston 18 reciprocates, and a crankshaft 24 that is connected to the piston 18 via a connecting rod 22 and converts the reciprocating motion of the piston 18 into rotational motion. A chamber 52 is formed by the piston 18 and the cylinder 20.

  Further, the piston mechanism 17 has an intake port 26 and an exhaust port 28 that communicate with the chamber 52 and are passages for intake and exhaust in the chamber 52. The ends of the intake and exhaust ports 26 and 28 are open to the outside.

  The cylinder 20 is provided with an intake valve 32 for opening and closing the intake port 26 and an exhaust valve 34 for opening and closing the exhaust port 28. The intake and exhaust valves 32 and 34 are opened and closed by driving a valve system (not shown) constituted by cams, valve springs, and the like. The valve system of this embodiment operates the intake and exhaust valves 32 and 34 so as to be two strokes and one cycle.

  Further, the pressure gas engine 50 includes a pressure gas supply source 40 that supplies pressure gas to the chamber 52. The pressure gas supply source 40 is a compressor when the pressure gas is compressed air, and is a steam generator (for example, a boiler) when the pressure gas is steam. The pressure gas supply source 40 supplies the pressure gas generated by these devices to the chamber 52 of the piston mechanism 17.

  The pressure gas engine 50 of this embodiment has a switching structure 54 that selectively switches so that the pressure gas supplied from the pressure gas supply source 40 to the chamber 52 flows through one of the intake and exhaust ports 26 and 28. And Hereinafter, the configuration of the switching mechanism 54 will be described in detail.

  The switching structure 54 includes a first flow path 56 that connects the pressure gas supply source 40 and the intake port 26, and a second flow path 58 that connects the pressure gas supply source 40 and the exhaust port 28. The switching structure 54 includes a switching valve that selectively communicates the pressure gas supply source 40 with one of the intake and exhaust ports 26 and 28. The switching valve has a two-way valve structure and is provided in each of the intake port system and the exhaust port system. In the intake port system, a valve 60 a is provided in the first flow path 56, and a valve 60 b is provided at the end side of the intake port 26 and connected to the first flow path 56. On the other hand, in the exhaust port system, a valve 60 c is provided in the second flow path 58, and a valve 60 d is provided on the end side of the connection portion with the second flow path 58. These valves are opened and closed by driving an actuator (not shown).

  An operation of the switching structure 54 when supplying the pressure gas of the pressure gas supply source 40 to the chamber 52 via the first flow path 56 and the intake port 26 will be described. In the switching valve of the intake port system, the valve 60a is opened and the valve 60b is closed. In the exhaust port system switching valve, the valve 60c is closed and the valve 60d is opened. Thereby, the pressure gas of the pressure gas supply source 40 is supplied to the chamber 52 via the first flow path 56 and the intake port 26, and the exhaust from the chamber 52 is discharged to the outside via the exhaust port 28. .

  On the other hand, an operation of the switching structure 54 when supplying the pressure gas of the pressure gas supply source 40 to the chamber 52 via the second flow path 58 and the exhaust port 28 will be described. In the switching valve of the intake port system, the valve 60a is closed and the valve 60b is opened. Then, in the switching valve of the exhaust port system, the valve 60c is opened and the valve 60d is closed. Thereby, the pressure gas of the pressure gas supply source 40 is supplied to the chamber 52 via the second flow path 58 and the exhaust port 28, and the exhaust from the chamber 52 is discharged to the outside via the intake port 26. .

  In addition, although each switching valve of intake and exhaust port system demonstrated the case where it was a two-way valve structure, it is not limited to this structure. As long as the pressure gas supply source 40 and one of the intake and exhaust ports 26 and 28 can be selectively communicated with each other, the switching valve may have a three-way valve structure that can be switched by a single valve body. . In this case, the three-way valve is provided at the connection portion between the first flow path 56 and the intake port 26 and at the connection portion between the second flow path 58 and the exhaust port 28.

  The operation of the piston mechanism 17 of the pressure gas engine 50 having such a switching structure 54 will be described with reference to FIGS. FIG. 4 is a diagram illustrating a state of the piston mechanism 17 when the crankshaft 24 rotates forward, and FIG. 5 is a diagram illustrating a state of the piston mechanism 17 when the crankshaft 24 rotates reversely. Since the pressure gas engine 50 of this embodiment is a two-stroke one-cycle engine, FIGS. 4 and 5 show the states of the piston mechanism 17 in the intake stroke (left side) and the exhaust stroke (right side), respectively. Here, in the present embodiment, as an example, a case where the forward rotation is the counterclockwise direction in the drawing and the reverse rotation is the clockwise direction in the drawing will be described.

  First, the state of the piston mechanism 17 when the crankshaft 24 rotates forward will be described with reference to FIG. At this time, in the pressure gas engine 50, the pressure gas is supplied from the pressure gas supply source 40 to the chamber 52 via the first flow path 56 and the intake port 26 by the switching structure 54, and the exhaust from the chamber 52 is discharged. It is in a state of being discharged to the outside through the exhaust port 28.

  In the intake stroke, the intake valve 32 is in an open state and the exhaust valve 34 is in a closed state. The rotation angle of the crankshaft 24 is located between 0 and 180 degrees. Pressure gas is supplied to the chamber 52 as the intake valve 32 is opened. The piston 18 descends in the direction of arrow 62 with the pressure of the pressure gas supplied to the chamber 52 to expand. The crankshaft 24 rotates forward by the linear motion of the piston 18.

  In the exhaust stroke, the intake valve 32 is closed and the exhaust valve 34 is opened. The rotation angle of the crankshaft 24 is located between 180 and 360 degrees. At a position within this range, the piston 18 rises in the direction of arrow 64 as the crankshaft 24 rotates. Due to the movement of the piston 18, the pressure gas in the chamber 52 is discharged to the outside as the exhaust valve 34 is opened.

  Next, the state of the piston mechanism 17 when the crankshaft 24 rotates in the reverse direction will be described with reference to FIG. At this time, in the pressure gas engine 50, the pressure gas is supplied from the pressure gas supply source 40 to the chamber 52 via the second flow path 58 and the exhaust port 28 by the switching structure 54, and the exhaust from the chamber 52 is discharged. The air is discharged to the outside through the intake port 26.

  In the intake stroke, the intake valve 32 is closed and the exhaust valve 34 is opened. The rotation angle of the crankshaft 24 is located between 180 and 360 degrees. That is, the intake and exhaust valves 32 and 34 and the crankshaft 24 are both in the same state as the exhaust stroke when the crankshaft 24 is rotating forward. Pressure gas is supplied to the chamber 52 as the exhaust valve 34 is opened. The piston 18 descends in the direction of arrow 62 with the pressure of the pressure gas supplied to the chamber 52 to expand. Due to the linear movement of the piston 18, the crankshaft 24 rotates in the reverse direction.

  In the exhaust stroke, the intake valve 32 is open and the exhaust valve 34 is closed. The rotation angle of the crankshaft 24 is located between 0 and 180 degrees. That is, the intake and exhaust valves 32 and 34 and the crankshaft 24 are both in the same state as the intake stroke when the crankshaft 24 is rotating forward. When the rotation angle of the crankshaft 24 is between 0 and 180 degrees, the piston 18 rises in the direction of the arrow 64 as the crankshaft 24 rotates. Due to the movement of the piston 18, the pressure gas in the chamber 52 is discharged to the outside as the exhaust valve 34 is opened.

  According to the pressure gas engine 50 of this embodiment, the operation timing of the intake and exhaust valves 32 and 34 by the valve system and the crankshaft are changed by a simple configuration of changing the route of intake and exhaust of the pressure gas using the switching structure 54. The forward rotation and the reverse rotation of the crankshaft 24 can be easily changed without changing the rotation angle of 24 at all. Therefore, in the pressure gas engine 50, a mechanism for controlling forward rotation and reverse rotation of the crankshaft 24 on the output side thereof, for example, a gear mechanism can be omitted.

  10, 110 engine, 12 combustion chamber, 14 internal combustion engine, 17 piston mechanism, 18 piston, 20 cylinder, 24 crankshaft, 26 intake port, 28 exhaust port, 32 intake valve, 34 exhaust valve, 38 connector, 40 pressure gas supply Source, 42 air supply source, 44 intermediate connector, 46 pressure gas system valve, 48 air system valve, 50 pressure gas engine, 52 chamber, 54 switching structure, 56 first flow path, 58 second flow path, 60 valve .

Claims (1)

A piston mechanism of an internal combustion engine that converts thermal energy generated by burning an air-fuel mixture in a combustion chamber into kinetic energy and outputs the kinetic energy;
An air supply source for supplying the combustion chamber with air for generating an air-fuel mixture;
A pressure gas supply source for supplying pressure gas to the combustion chamber;
An intermediate connector formed at the end of a passage formed in the piston mechanism and leading to the combustion chamber, and connected to an air supply source and a pressure gas supply source;
Have
The intermediate connector includes a switching valve for selectively communicating the passage and one of the two supply sources,
When the pressure gas supply source communicates with the passage by the switching valve, the piston mechanism converts the pressure energy of the pressure gas supplied from the pressure gas supply source into the combustion chamber into kinetic energy and outputs the kinetic energy .
The air supply source includes a throttle valve that adjusts the flow rate of air taken from outside,
The pressure gas supply source is a compressor that compresses air to generate compressed air that is compressed gas.
A hybrid engine characterized by that.

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