JPH0160656B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary engine, and particularly to its exhaust structure.

(Prior art) In a rotary engine, the rotor always rotates in a fixed direction, and the working chamber formed between it and the rotor housing performs suction, compression, expansion, and exhaust while changing its volume. comparison,
It has the advantages of smooth motion, low mechanical loss, easy rotor balancing, and very low engine vibration.

One such rotary engine is an engine schematically shown in FIG. This rotary engine includes a rotor housing 1 having a cylindrical inner surface.
A rotor 3 having a sliding part that slides along the cylindrical inner surface of the rotor housing is fixed to a rotating shaft 2 disposed coaxially with the axis of the rotor housing. A seal member 5 having dimensions corresponding to the opening of the combustion chamber 4 formed in the combustion chamber 1 is provided. Note that the openings at both ends of the rotor housing 1 are sealed by side housings (not shown).

The intake hole formed in communication with the combustion chamber 4 and the exhaust hole formed opposite to the intake hole in the combustion chamber 4 are provided with an intake valve 6 and an exhaust valve 7, respectively, and these valves are operated by a valve drive (not shown). The means control the inflow of the fuel and air mixture and the discharge of the combustion gases in response to the movement of the rotor 2.

Further, a seal valve 8 is provided in the rotor housing 1 so as to be able to reciprocate in the radial direction thereof, and is located in front of the combustion chamber 4 in the rotational direction of the rotor 3, and a seal valve 8 is provided between the combustion chamber and the exhaust hole. The seal valves 9 are driven by valve driving means in accordance with the rotation of the rotor, and are in contact with the surface of the rotor 2 to partition the space defined by the rotor housing and the rotor, thereby compressing the air-fuel mixture and compressing the combustion gas. This prevents the fuel from entering the combustion chamber in four directions.

(Problems to be Solved by the Invention) However, in such a rotary engine, not only are the exhaust valves 7 and the seal valves 9 individually required, but they are also required to be arranged in accordance with the rotation of the rotor 3. Since driving means are required to be driven in conjunction with each other, there are problems in that the mechanism becomes complicated and the space occupied becomes large.

The present invention has been made in view of such problems, and an object of the present invention is to provide a simple exhaust structure that does not include an exhaust valve and a driving means related thereto.

(Means for Solving the Problems) In order to achieve this object, the exhaust structure of the rotary engine of the present invention particularly includes a seal valve housing hole provided through the rotor housing in the radial direction, and a seal valve housing hole provided through the rotor housing in the radial direction. An exhaust hole that communicates with the outside of the rotor housing and has a seating part adjacent to the hole and spaced apart or widened in parallel to the extending direction thereof, and a seal valve housing hole that is reciprocably mounted and matches the seating part. and a seal valve having a shaped enlarged portion.

(Function) Therefore, in the exhaust structure of the present invention, when the seal valve moves inward to the rotor housing, its enlarged portion moves in the direction of movement and separates from the seating portion provided at the exhaust port, thereby causing the rotor housing and rotor This allows communication between the space defined by the exhaust port and the exhaust port. On the other hand, when the seal valve moves outward from the rotor housing in relation to the rotational movement of the rotor, the enlarged part provided on the seal valve and matching the shape of the seating part of the exhaust hole seats on the seating part and moves toward the rotor housing. and cutting off communication between the space defined by the rotor and the exhaust port. Therefore, there is no need for an exhaust valve or a driving means for driving the exhaust valve in relation to the rotation of the rotor, resulting in a simple engine structure.

(Example) An example of the exhaust structure for a rotary engine of the present invention will be described in detail below with reference to the drawings.

1a and 1b are cross-sectional views of a rotary engine having an exhaust structure according to the present invention;
1 is a diagram showing how a mixture of fuel and air is taken into a space _S1 defined by a seal portion 5 provided in a rotor 3, and how combustion gas is exhausted from a space _S2 . b is a diagram showing how the air-fuel mixture is compressed. Note that the parts equivalent to those shown in Figure 3 are:
It is indicated by the same symbol.

A rotor 3 is eccentrically fixed to a rotating shaft 2 disposed coaxially with a rotor housing 1 having a cylindrical inner surface 1a, and has a sliding portion that slides along the cylindrical inner surface, in which a combustion chamber A sealing member 5 having a larger surface dimension than the opening of 4 is provided. An intake valve 6 is associated with the intake hole formed in communication with the combustion chamber 4, and seal valves 8 and 9 are associated with the accommodation holes that sandwich the combustion chamber 4 and pass through the rotor housing 1 in the radial direction. It is inserted so that it can reciprocate in the radial direction. Note that these intake valves 6 and seal valves 8, 9 are driven by respective valve drive cams 6a, 8a and 9a, which constitute a part of a valve drive means that is driven in relation to the rotational movement of the rotor 3. It controls the inflow of the air-fuel mixture into the combustion chamber 4 and partitions a space defined by the rotor housing 1 and the rotor 3.

Reference numeral 10 denotes a connection which, when the seal valve 8 is pushed down and brought into contact with the surface of the rotor 3 to partition the space, connects the space that expands as the rotor 3 rotates to the outside and prevents the generation of a vacuum. It is a hole, numbered 11
is an exhaust hole that guides combustion gas outward.

One end of the exhaust hole 11 opens to the outside of the rotor housing 1, and the other end of the exhaust hole 11 opens to the cylindrical inner surface 1a of the rotor housing 1.
A seating portion 13 is formed parallel to the extending direction of the seal valve housing hole 12 that accommodates the seal valve 9 and adjacent to the housing hole 12 .

On the other hand, the seal valve 9 associated with the exhaust hole 11 and, in this embodiment, the seal valve 8 associated with the communication hole 10
As shown in FIG. 2, the seal valve body 15 is swingably connected to the valve body drive member 16 using a connecting member 17. Specifically, the seal valve body 16 and the valve body drive member A fitting recess is formed in each end face of the member 17, and the connecting member 17 having a fitting protrusion that can be fitted into the fitting recess is fitted to connect the members 17. Note that the fitting recess 18 formed in the seal valve body 15 has a fan shape, so that it can perform rocking motion with respect to the valve body drive member 16.

The valve body driving member 16 constituting the seal valve has an end portion to which the seal valve body 15 is swingably connected.
It is formed as an enlarged portion 19 having an outer diameter that matches the seating portion 13, and a portion of the enlarged portion 19 facing the seating portion 13 has a portion extending parallel to the extending direction of the connected seal valve body 15. A cutout portion 20 is formed along the inner surface. This notch 20 is provided to allow combustion gas to still flow out into the exhaust hole 11 even when the enlarged portion 19 partially overlaps the seating portion 19 due to the outward movement of the seal portion 9. It is.

Therefore, as shown in FIG. 1a, the seal valve 9 is moved into the rotor housing 1 by the seal valve drive cam 9a
When pressed down inwardly, the enlarged portion 19 of the seal valve 9 releases the seat 13 formed in association with the exhaust hole 11.
Since a gap is formed between the _two , the combustion gas in the space S2 flows out into the exhaust hole 11 through the gap.

As shown in FIG. 1b, the seal valve drive cam 9a
rotates in accordance with the rotation of the rotor 3, and when the seal valve 9 is pushed up to the outside of the rotor housing 1 by a valve spring (not shown), the enlarged part of the seal valve 9, which has a shape that matches the seating part 13, becomes the seating part. Since the exhaust hole 11 is completely seated, communication between the space S ₂ and the exhaust hole 11 is cut off. Note that the exhaust structure of the present invention is not limited to the above-mentioned embodiments; for example, the seating portion may be formed by expanding in the extending direction of the seal valve accommodation hole, and various modifications may be made within the scope of the claims. is possible.

(Effects of the Invention) As detailed above, the rotary engine exhaust structure of the present invention allows communication between the space defined by the rotor housing and the rotor and the exhaust hole in connection with the reciprocating motion of the seal valve. Since the exhaust valve and the drive device for driving the exhaust valve are omitted, the structure thereof can be simplified.

[Brief explanation of drawings]

Figures 1a and b are cross-sectional views of a rotary engine having an exhaust structure according to the present invention, and Figures 2a and b are
1 is a partially cutaway front view and a side view of a seal valve suitable for the exhaust structure shown in FIG.
The figure is a cross-sectional view showing a conventional rotary engine. 1...Rotor housing, 2...Rotating shaft, 3...
...Rotor, 4...Combustion chamber, 5...Seal member, 6
...Intake valve, 7...Exhaust valve, 8,9...Seal valve, 10...Communication hole, 11...Exhaust hole, 12...
Seal valve accommodation hole, 13... Seat portion, 15... Seal valve body, 16... Valve body drive member, 17... Connection member, 18... Fitting recess, 19... Enlarged portion,
20... Notch portion, S ₁ , S ₂ ... Space.

Claims (1)

[Scope of Claims] 1. A rotary engine that discharges combustion gas as the rotor rotates, which is fixed to a rotating shaft coaxially disposed on the cylindrical inner surface of a rotor housing and is slidable along the inner circumferential surface of the rotor. In the exhaust structure of the rotor housing, the rotor housing has a seal valve accommodating hole provided through the rotor housing in the radial direction, and a seating part adjacent to the seal valve accommodating hole and spaced apart or widened in parallel to the extending direction of the rotor housing. The seal valve includes an exhaust hole that communicates with the outside of the housing, and a seal valve that is reciprocably attached to the seal valve receiving hole and has an enlarged portion shaped to match the seating portion, and the seal valve has an enlarged portion that is shaped to match the seating portion. An exhaust structure for a rotary engine, characterized in that an exhaust hole is opened and closed by seating on the seating portion.