TWI816740B - A rotary valve internal combustion engine - Google Patents

Abstract

A rotary valve internal combustion engine comprising: and a rotary valve rotatable about a rotary valve axis in the bore in the valve housing, the rotary valve having a hollow valve body having an interior volume forming a part of the combustion chamber, wherein the interior volume of the hollow valve body is subjected to combustion gases throughout the combustion process, and further having in a wall part thereof a port giving, during rotation of the valve, fluid communication successively to and from the combustion chamber via inlet and exhaust ports in the valve housing, wherein the engine has an airbox containing a curved tuning pipe leading from the air inlet of the engine into a filtered air volume part of the airbox.

Description

Rotary valve internal combustion engine

The present invention relates to a rotary valve internal combustion engine, in which the control of air intake and exhaust of the internal combustion engine is accomplished by a rotary valve.

A rotary valve internal combustion engine, including: a piston connected to a crankshaft and reciprocating in a cylinder, the cylinder having a combustion end, a combustion chamber partially defined by the piston and the combustion end of the cylinder, a valve cover fixed A hole is defined outside the combustion end of the cylinder and in the hole of the valve cover and a rotary valve that rotates along the rotary valve axis. The rotary valve has a hollow valve body. The hollow valve body has an inner volume, forming the A portion of a combustion chamber in which the inner volume of the hollow valve body accommodates combustion gases during combustion, and further has a port in its wall portion for providing liquid flow through inlet and outlet ports within the valve cover when the valve rotates. Sequentially flows to and from the combustion chamber.

The object of the present invention is to provide an improvement in the above-mentioned internal combustion engine.

The present invention provides a rotary valve internal combustion engine, including: a piston connected to a crankshaft and reciprocating in a cylinder; the cylinder has a combustion end; a combustion chamber is partially defined by the piston and the combustion end of the cylinder; a valve Cover, fixed to the outside of the combustion end of the cylinder and defined in the hole of the valve cover A rotary valve having a hole and rotating along the rotary valve axis, the rotary valve having a hollow valve body having an inner volume forming part of the combustion chamber, wherein the inner volume of the hollow valve body is used during the combustion process accommodating combustion gases, and further having an interface in its wall portion for providing liquid flow in the valve cover through input and outlet interfaces to sequentially flow to and from the combustion chamber when the valve rotates, wherein the internal combustion engine has a The curved coordination pipe is an air box, and the curved coordination pipe is connected to the air filter volume part of the air box from the air intake of the internal combustion engine.

Preferably, the internal combustion engine has a carburetor, and the bent joint pipe is fixed at the air inlet of the carburetor.

In one embodiment, the air box is divided into an unfiltered volume and a filtered volume by a partition wall. The partition wall includes a filter disc, and air enters the filtered volume from the unfiltered volume through the filter disc. The coordination The tube inlet is located in this filter volume.

In another embodiment, the unison tube is connected to the unfiltered volume from the cylinder and to the filtered volume through the partition wall. The coordination pipe is connected to the filter plate next to the area.

Preferred embodiments of the present invention are described in the Examples with reference to the drawings.

1:piston

10:Driving gear

11: Drive components

12: Drive shaft

13:Lower bearing

14:Crankcase

15,16: Helical gear

17: Channel or pipeline

18: Upper bearing

19: Content volume

2:Cylinder

21:Interface

22: Lower perimeter

23: wall

24:Mars Plug

25: Plug hole

27:Air intake interface

28:Carburetor

29: Shell

3: Crankshaft

30:Air box

31:Inlet channel

32: Filtered gas volume

33: next door

34:Filter

35: Coordination management

36:Air intake

37:Air intake

4: Combustion chamber

5: Rotary valve

5a:shaft

6: Drive shaft

7: Ball bearings

8: Valve cover

9: Driven gear

Figure 1 shows a cross-sectional view of a single-cylinder air-cooled spark ignition rotary valve internal combustion engine.

Figure 2 illustrates a side partial cross-sectional view of an embodiment of the internal combustion engine of the present invention, showing an intake pipe.

Figure 1 shows a single-cylinder air-cooled internal combustion engine. The internal combustion engine has a cylinder cover including the cylinder 2 . A piston 1 is connected in a conventional manner to a crankshaft 3 that rotates in a crankcase 14 and can travel back and forth in the cylinder 2 . The upper part of the cylinder 2 is enclosed by a combustion chamber 4 with a combustion chamber cover. The combustion chamber cover has an air inlet port 27 for flowing the gasoline/oil mixture into the combustion chamber, and an exhaust port (not shown) for discharging exhaust gas into and out of the combustion chamber 4, and is rotated by a rotating Valve 5 controls air flow. In this embodiment, the valve 5 can rotate along an axis 5a coaxial with the cylinder 2 in the valve cover 8 in the combustion chamber cover. In other embodiments, the rotation axis of the valve body is offset from the axis 5a of the cylinder 2 .

At one end away from the combustion chamber 4, the rotary valve 5 has a central drive shaft 6 with a single-race ball bearing 7 to rotatably support the valve 5 in the valve cover 8. The valve driving shaft 6 is fixed to a coaxial driven gear 9 , which meshes with a driving gear 10 of a driving member 11 , so that the driven gear 9 and the rotary valve 5 are connected to the crankshaft 3 . The drive member 11 includes a drive shaft 12 located in a channel or line 17 of the cylinder cover, arranged for rotation on an upper bearing 18 adjacent the drive gear 10 and a lower bearing 13 adjacent the crankshaft 3 . The driving member 11 includes a helical gear 15 meshing with a helical gear 16 fixed on the crankshaft and rotating together with the crankshaft 3 . Therefore, the rotation of the crankshaft 3 and the movement of the piston can be coordinated by the rotation of the rotary valve 5, so that the internal combustion engine operates with a conventional four-stroke cycle. In order to achieve the above purpose, the diameter of the driven gear 9 should be twice that of the driving gear 10, so the rotation speed of the rotary valve 5 is half of that of the internal combustion engine. The rotary valve 5 includes a substantially cylindrical rotary valve body 5 that can rotate along a rotary valve axis 5a and has a tight sliding fit in the hole of the valve cover 8. The rotary valve 5 has a hollow valve body with an inner volume. 19, forming part of the combustion chamber. The valve has a substantially cylindrical body part, including a valve body 19 with an inner diameter slightly larger than the shaft 6, forming a shoulder 14. The inner race of the ball bearing 7 is arranged relative to the shoulder 14. The valve body 19 extends into the combustion chamber and has in its interior a volume 18 that forms part of the combustion chamber 4 and contains the combustion gases during all stages of the combustion process.

The rotary valve body 19 has an interface 21 that sequentially allows liquid to flow to and from the inner volume of the valve when the valve rotates, and therefore can flow to the combustion chamber air inlet and exhaust interface of the valve cover. In this embodiment, the interface 21 is in the form of a recess formed on the lower periphery 22 of the valve body wall 23 adjacent to the combustion chamber 4. The recess extends upward from the lower periphery of the valve body wall to form the valve body. Interface 21 on one side.

A spark plug 24 fixed in a plug hole 25 formed in the valve housing 8 and extending to the valve hole provides ignition.

FIG. 2 shows a partial cross-sectional view of the internal combustion engine of FIG. 1 and shows an air inlet pipe for gasoline/oil. Part of the casing 29 of the internal combustion engine includes a gas box 30, also a ventilation chamber, divided by a wall 33 into: an unfiltered gas volume, into which ambient air enters via an air inlet channel 31; and a filtered gas volume 32.

The partition wall 33 includes a filter 34 through which air enters the filtered gas volume 32 from the unfiltered side. The intake pipe has a coordinating pipe 35 fixed to the carburetor. The coordination pipe 35 communicates with the unfiltered volume of the air box from the air inlet 36 of the carburetor 28 through a meandering path, and communicates with the filtered gas volume 32 through the partition wall. In one form, the coordination tube 35 communicates with the filter disc itself. The air inlet 37 of the unison pipe 35 is located in the filter volume 32 and ignites outward to improve the air flow into the unison pipe 35 and into the internal combustion engine. The aforementioned curved path can maximize the length of the coordination tube and increase the efficiency of the internal combustion engine without causing a significant change in its overall size.

Although only shown as a simple curved shape, those skilled in the art will understand that the coordination tube may have a more complex shape and may follow a meandering path.

1:piston

2:Cylinder

3: Crankshaft

4: Combustion chamber

5: Rotary valve

5a:shaft

6: Drive shaft

7: Ball bearings

8: Valve cover

9: Driven gear

10:Driving gear

11: Drive components

13:Lower bearing

14:Crankcase

17: Channel or pipeline

Claims (6)

A rotary valve internal combustion engine, including: a piston connected to a crankshaft and reciprocating in a cylinder, the cylinder having a combustion end, a combustion chamber partially defined by the piston and the combustion end of the cylinder, a valve cover fixed A hole is defined outside the combustion end of the cylinder and in the hole of the valve cover and a rotary valve that rotates along the rotary valve axis. The rotary valve has a hollow valve body. The hollow valve body has an inner volume, forming the A part of the combustion chamber, in which the inner volume of the hollow valve body accommodates combustion gases during the combustion process, and further has an interface on a wall portion thereof for inlet and outlet interfaces in the valve cover when the rotary valve rotates Providing liquid circulation to and from the combustion chamber in sequence, wherein the internal combustion engine has an air box including a meandering unison pipe connected to a filter volume of the air box from an air inlet of the internal combustion engine, wherein the The air box is divided into an unfiltered volume and a filtered volume by a partition wall, and the coordination pipe is connected to the unfiltered volume from the air inlet and connected to the filtered volume through the partition wall. A rotary valve internal combustion engine as described in item 1 of the patent application, wherein the internal combustion engine has a carburetor, and the coordination pipe is fixed at the air inlet of the carburetor. For example, in the rotary valve internal combustion engine described in Item 1 or 2 of the patent application, the partition wall includes a filter plate, air enters the filtered volume from the unfiltered volume through the filter plate, and the air inlet of the coordination pipe is located in the filtered volume. For example, in the rotary valve internal combustion engine described in item 3 of the patent application, the coordination pipe is connected to the filter plate in the partition wall. In the rotary valve internal combustion engine described in Item 1, 2 or 4 of the patent application, the coordination tube has a meandering shape along its length. In the rotary valve internal combustion engine described in item 3 of the patent application, the coordination tube has a meandering shape along its length.