JPH039290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an improvement in a two-stroke fuel injection internal combustion engine in which a main body of the engine is rotated by a piston that rotates and reciprocates.

``Prior Art'' The applicant, the inventor of this invention, has proposed a ``Fuel Injection Internal Combustion Engine Equipped with a Rotating Reciprocating Piston'' (Japanese Patent Application No. 57-2059) as a two-stroke fuel injection internal combustion engine as described above; ``Fuel injection internal combustion engine for aviation with a rotating engine body'' (Japanese Patent Application No. 57-4404) has already been disclosed.

The common feature of both inventions is that the air in the main body of the engine rotates at high speed, and the fuel is injected from the inside to the outside of the rotating shaft of the main body, applying centrifugal force to the fuel and diffusing the fuel. , to significantly increase mixing with high-speed rotating air. As a result, the particle size of the fuel spray can be reduced and the combustion efficiency can be improved.

In addition, the rotation of the main body allows for effective air cooling, the exhaust gas can be used to form a turbine, and the piston's reciprocating rotation can be made smoother.
It has features such as being able to be constructed compactly as it does not require a crank mechanism.

"Problems to be Solved by the Invention" In both of the above inventions, the left scavenging hole communicating with the left air supply chamber and the right scavenging hole communicating with the right air supply chamber are each opened into the combustion chamber. was. During scavenging, the scavenging air was flowed into the combustion chamber from the left air supply chamber through the left scavenging hole, and from the right air supply chamber through the right scavenging hole. Therefore, the scavenging air flowing into the combustion chamber was in a state facing each other.

In order to obtain an internal combustion engine with higher combustion efficiency,
Furthermore, there is a need to improve the scavenging efficiency, and there was a problem that the above configuration could not sufficiently meet this requirement.

"Means for Solving the Problems" This invention aims to improve the scavenging means in both of the above inventions to further increase the scavenging efficiency, and has the following configuration as a gist.

An air scavenging path is provided in the main body to communicate air supply chambers formed oppositely between an air supply chamber cover and a piston that close the main body of the engine during air scavenging.

The main body is also provided with a plurality of scavenging holes that are connected to the scavenging passage and open toward one end of the combustion chamber during scavenging.

A communication path is provided in the main body to communicate the scavenging holes with each other.

"Operation" During scavenging, the scavenging air sent from the opposing air supply chambers flows into the scavenging path. The scavenging air that has entered the scavenging passage flows into the scavenging hole from the communication passage and flows into one end of the combustion chamber.

The scavenging air flowing into the combustion chamber is in the same direction,
Forms single flow scavenging air and efficiently scavenges combustion gas from the exhaust hole.

"Embodiments" The present invention will be described in detail below based on illustrated embodiments.

Reference numeral 1 denotes a fixed shaft, and as shown in FIG. 1, a cooling and lubricating oil passage 2 is provided inside the shaft, and the cooling and lubricating oil passage 2 is connected to a cooling and lubricating oil pump (not shown). Further, as shown in FIG. 2, a fuel passage 3 is provided inside the fixed shaft 1, which is connected to a fuel injection pump (not shown).

A plurality of fuel injection valves 4 are arranged in the radial direction of the fixed shaft 1, and are connected to the fuel passage 3. As shown in detail in FIG. 3, this fuel injection valve 4 has a nozzle needle 5 fixed to the bottom surface of a mounting hole 1' formed in the fixed shaft 1. Reference numeral 6 denotes an injection pressure adjustment section of the nozzle needle 5. Reference numeral 7 denotes a cylindrical nozzle body, which is slidably fitted onto the nozzle needle 5. The step at the upper part of the inner circumferential surface comes into contact with the injection pressure adjusting section 6 . Reference numeral 8 denotes a flange-shaped spring seat 8 provided around the lower part of the nozzle body 7. Reference numeral 9 denotes an adjustment nut which is screwed into the upper part of the mounting hole 1', and a spring 10 is stretched between the adjustment nut 9 and the spring seat 8. Therefore, by rotating the adjustment nut 9, the nozzle body 7 is moved, the load applied to the injection pressure adjustment section 6 is adjusted, and the fuel injection pressure of the nozzle needle 5 can be adjusted. By configuring the fuel injection valve 4 in this way, it becomes possible to arrange a plurality of fuel injection valves 4 even if the diameter of the fixed shaft 1 is small, and fine adjustment of the fuel injection pressure is also possible using the fixed shaft. This can be easily done from the outside of 1.

Reference numeral 11 denotes a piston, which is fitted onto the fixed shaft 1 so as to be able to slide freely, and a combustion chamber 12 is formed between the pistons 11.

Reference numeral 13 denotes piston pins, two of which protrude from each piston 11 in the radial direction. The piston pin 13 includes a body-side rolling ring 14 that is rotatably fitted into a piston guide hole 17 of a main body 16 of the engine, which will be described later, and a curved ring that is rotatably fitted into a curved groove 26 of a curved groove tube 25. A groove side transfer wheel 15 is attached to each.

Reference numeral 16 denotes a main body of the engine, in which piston guide holes 17 in the longitudinal direction are provided facing each other.
As described above, the main body side rolling ring 14 of the piston pin 13 is fitted into the piston guide hole 17 so as to be freely rotatable.

Next, the scavenging passage 18, which is the most characteristic feature of this invention,
The scavenging hole 19 and the communication path 20 will be explained.

Reference numeral 18 indicates a plurality of scavenging passages, which are shown in FIGS. 1 and 4.
As shown in FIG. 5, when the piston 11 is in the scavenging position, the air supply chamber 32 formed between the main body 16, the opposing piston 11, and air supply chamber covers 30a and 30b (to be described later) is mutually moved. To communicate,
It is provided in the main body 16. Reference numeral 19 denotes a plurality of scavenging holes provided in the main body 16, which open at one end of the combustion chamber 12 (on the left side in the drawing). Also, these scavenging holes 1
An annular communication path 20 that communicates with the main body 16 is provided in the main body 16.

Note that 21 is a plurality of exhaust holes, which open at the other end of the combustion chamber 12 (on the right side in the drawing) and communicate with an exhaust injection port 22 provided in the main body. Reference numeral 23 denotes air compression vanes, which are arranged radially around the center of the main body 16 (see FIG. 5). Further, 24 is a group of rotor blades arranged around the outer periphery of the exhaust injection port 22.

25 is a curved groove tube, and the main body 16 is rotatably attached to the main body 1.
6, and a curved groove 26 is formed in each inner peripheral surface. The curved groove side rolling ring 15 of the piston pin 13 is fitted into the curved groove 26 . This curved groove 26 is formed in a substantially sine curve shape so that the piston 11 rotates once during two reciprocations. 27 is an inlet port,
Each of them is provided through the outer end of the curved groove tube 25.
28 is a suction pipe.

Reference numeral 29 denotes a stator blade group, which is disposed inside the rotor blade 24 group and outside the exhaust injection port 22, and an exhaust turbine is constituted by the exhaust injection port 22, the stator blade 29, and the rotor blade 24. .

Reference numerals 30a and 30b denote air supply chamber covers, which are fixed to both outer ends of the main body 16 and are externally fitted to be rotatably opposed to the fixed shaft 1. These air supply chamber lids 30a, 30
b, an inlet 27 provided in each curved groove tube 25;
An air supply port 31 communicating with is provided. The air supply port 31 opens into an air supply chamber 32 formed by the fixed shaft 1, the piston 11, the main body 16, and the air supply chamber covers 30a and 30b. As a result, the air supply ports 31 of the air supply chamber covers 30a, 30b rotate together with the main body 16.
The intake port 27 of the fixed curved groove tube 25 forms a rotary valve.

In addition, one air supply chamber cover 30a (left side in the drawing)
A large gear 33 is fixed to. A power shaft 34 is provided on the other air supply chamber cover 30b, and a starting gear (not shown) is attached to the power shaft 34.

35 is a fixed outer cylinder, which is fixed to the curved groove cylinder 25 on the outside of the curved groove cylinder 25. Reference numeral 36 denotes an air guide vane, which is disposed on the fixed outer cylinder 35 on the outside of the air compression vane 23 of the main body 16. 37 is an exhaust injection nozzle. 38 is an air filter, and the air passing through this air filter 38 by the rotating air compression vanes 23 is compressed by the air compression vanes 23 and the air guide vanes 36, and is then passed through a turbocharger (not shown) or directly into an intake pipe. Sent to 28. That is, the air compression vanes 23 and the air guide vanes 36 constitute a supercharger.

A fixed plate 39 connects the fixed shaft 1 and the curved tube 26, and a small gear 40 that meshes with the large gear 33 is pivotally mounted on the fixed plate 39. A gear shaft 41 of the small gear 40 is connected to auxiliary equipment such as a fuel injection pump and a cooling and lubricating oil pump (not shown). If the gear ratio of these large gears 33 and small gears 40 is set to 2:1, the small gears 40
rotates once. Note that the fixed outer cylinder 35 is attached to the fixed plate 39.
It is also possible to fix.

The operation of the internal combustion engine of the present invention is similar to a conventional two-stroke internal combustion engine. First, when the piston 11 reaches near the top dead center as shown in FIG. 2, the fuel injection valve 4 is opened to inject fuel and cause an explosion. When the piston 11 approaches the bottom dead center as shown in FIG. 1, the exhaust hole 21 opens and exhaust gas is injected from the exhaust injection port 22. At this time, the stationary blade 29 that constitutes the exhaust turbine
The rotation of the main body 16 is assisted by the group of rotor blades 24.

Next, the group of scavenging holes 19 opens, and the scavenging air flows from the air supply chamber 32 through the scavenging passage 18 and the communication passage 20 to the combustion chamber 12.
is supplied to the compressor and moves to the compression stroke. Since the scavenging air supplied from the group of scavenging holes 19 flows in the same direction, a single flow of scavenging air is formed, so that the scavenging efficiency is extremely high.

"Effect" Scavenging air is supplied from the opposing air supply chambers to one end of the combustion chamber, and scavenging is performed in a single flow, which has a great effect on increasing scavenging efficiency. In addition, the large rotation radius of the scavenging passage increases the rotational speed of the air,
By further accelerating the speed at the scavenging hole group and increasing the air rotation speed within the combustion chamber to the maximum, it is highly effective to apply a large centrifugal force to the fuel oil particles and obtain ideal combustion.

In other words, by rotating the engine body at high speed, performing single-flow scavenging, and installing a fixed shaft with a fuel injection valve at the rotation center, ideal single-flow scavenging is achieved by eliminating the column of exhaust gas that forms at the rotation center during scavenging. By injecting fuel outward from the center of rotation of a high-speed rotating air stream, a completely new force called centrifugal force is applied to the fuel oil droplets, and the oil droplets are diffused and burned by pump pressure, penetration force, and centrifugal force. let in this case,
The smaller the oil droplets, the easier it is to ride the rotating air flow, and while burning, they rush through the air due to penetrating force and centrifugal force.
Great effect in obtaining ideal combustion.

Furthermore, by rotating the engine body and using single-flow scavenging, the exhaust turbine can be configured on one side, which has a great effect of increasing thermal efficiency, and also has a great effect of making it possible to easily configure the supercharger.

The fuel injection pressure of the fuel injection valve can be adjusted from the outside of the fixed shaft using an adjustment nut, which has the effect of making it easy to adjust the injection pressure, and also has the great effect of allowing a large number of fuel injection valves to be arranged on a small diameter fixed shaft. .

[Brief explanation of the drawing]

FIG. 1 is a horizontal sectional view of the piston in the vicinity of the bottom dead center, and FIG. 2 is a vertical sectional view of the piston in the vicinity of the top dead center. Figure 3 is a longitudinal sectional view of the fixed shaft showing the installation state of the fuel injection valve;
The figure is a schematic cross-sectional view of the main body showing the communication state of the scavenging passage, the communication passage, and the scavenging hole, and FIG. 5 is a schematic cross-sectional view showing the arrangement of the air compression vanes and air guide vanes forming the supercharger. DESCRIPTION OF SYMBOLS 1...Fixed shaft, 4...Fuel injection valve, 11...Piston, 12...Combustion chamber, 13...Piston pin, 16...Main body, 18...Scavenging air passage, 19...Scavenging hole, 20... Connection path, 21...Exhaust hole, 22...
...Exhaust injection port, 23...Air compression vane, 24...
Moving blade, 25...Curved groove cylinder, 26...Curved groove, 29...
Stationary blades, 30a, 30b...Air supply chamber lid, 32...Air supply chamber, 35...Fixed outer cylinder, 36...Air guide vanes, 39...Fixed plate.

Claims (1)

[Scope of Claims] 1. A piston that is slidably fitted on the outside facing a fixed shaft is slidably housed in the main body of the engine, a combustion chamber is formed between the pistons, and the main body is rotatably inserted into the main body. The piston pins, which protrude from the piston, slide into curved grooves formed on the inner circumferential surface of the curved tube fitted externally facing the piston, through guide holes formed in the main body facing each other in the longitudinal direction. A 2-cycle engine body that can be fitted freely and has a fuel injection valve on a fixed shaft that injects fuel into the combustion chamber, and an exhaust injection port that injects exhaust gas to assist the rotation of the main body. In an internal combustion engine in which the engine rotates, there is a scavenging air passage that connects the air intake chambers formed opposite to each other between the air intake chamber cover that closes the main body and the piston during scavenging, and a scavenging air passage that communicates with the scavenging air passage and connects the air intake chambers that are formed facing each other during scavenging. 1. An internal combustion engine with a rotating engine body, characterized in that the main body is provided with a plurality of scavenging holes that open toward one end of a combustion chamber, and a communication path that communicates the scavenging holes with each other. 2. A fuel injection valve consists of a nozzle needle fixed to the bottom of a housing hole formed in a fixed shaft, a nozzle body that is slidably fitted onto the nozzle needle in contact with an injection pressure adjustment section, and a nozzle body that is fitted around the nozzle body. An internal combustion engine in which an engine main body rotates according to claim 1, comprising a spring tensioned between a spring seat provided therein and an adjustment nut screwed into a housing hole. 3 The fixed shaft has a fixed outer cylinder that fixes the curved groove cylinder, and the main body has air compression vanes arranged on the outer periphery, and the fixed outer cylinder has air guide vanes arranged on the outside of the air compression vanes. An internal combustion engine in which the engine body according to claim 1 or 2 rotates. 4 The exhaust injection port has a stator blade fixed to a curved groove tube,
4. An internal combustion engine in which the engine main body rotates according to claim 1, wherein a moving blade fixed to the main body is disposed outside the stationary blade. 5. Claims 1 to 5, wherein a large gear is fixed to the air supply chamber cover, and a small gear that meshes with the large gear is pivotally mounted to the fixed plate that connects the fixed shaft and the fixed outer cylinder. An internal combustion engine in which the engine body according to item 4 rotates. 6. Claims 1 to 5, wherein the curved groove cylinder is provided with an intake port, and the air supply chamber lid is provided with an air supply port that communicates with the intake port and opens into the air supply chamber.
An internal combustion engine in which the engine body as described in paragraph 2 rotates.