Coaxial rotating cylinder engine
The coaxial rotation cylinder engine addresses inefficiencies in straight motion internal combustion engines by using a semi-circle cam and stator to create a rotating cylinder mechanism, resulting in improved power generation efficiency and reduced weight.
Patent Information
- Application Number
- PCT/KR2023/017043
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-10-29
- Filing Date
- 2023-10-30
- Publication Date
- 2025-05-08
AI Technical Summary
Existing internal combustion engines face inefficiencies due to the straight motion design, which limits power generation and increases weight and bulkiness.
The coaxial rotation cylinder engine design incorporates a semi-circle cam and a stator to create a rotating cylinder mechanism, allowing for more efficient power generation and reduced weight by eliminating crank-rods and cranks-chambers.
This design enhances power generation efficiency, reduces engine weight and bulkiness, and allows for the creation of a four-cylinder engine using only two cylinder chambers, improving overall engine performance.
Smart Images

Figure KR2023017043_08052025_PF_FP_ABST
Abstract
Description
coaxial rotating cylinder engine
[0001] The present invention relates to a structure, specification and component design for improving an internal combustion engine.
[0002] It was invented to find improvements based on the linear motion of an internal combustion engine.
[0003] Drawing 1. Perspective drawing of a 4-cylinder, 2-chamber, 2-cylinder gasoline engine.
[0004] 100 Starting point of the crank (circular, only non-circular inside the cylinder chamber)
[0005] 101 intake, opposite side is exhaust
[0006] 102 Semicircular cam, extra space for compressed gases to condense in the empty space
[0007] 103 Middle part of the crank (the picture is hexagonal)
[0008] 104 Stator and safety pin to secure the stator again
[0009] 105 cylinders
[0010] 106 Chambers and thin walls dividing the chambers
[0011] 107 Spark plug insert
[0012] Drawing 2. An enlarged perspective view of the 'fixer' corresponding to item 104 of Drawing 1.
[0013] 201 The head of the 'stator' (fixed to the cylinder chamber through a screw thread)
[0014] 202 The leg part of the 'stator' (smooth surface, bearing mounting, etc. help to convert the cylinder's motion)
[0015] 203 Safety pin of 'fixer' (for secondary fixation)
[0016] Holes for inserting and fixing the stator in the 204 cylinder chamber
[0017] 205 A fixing device corresponding to Article 203 (such as a safety pin hole) must be located.
[0018]
[0019] Drawing 3. A perspective drawing to help understand the connection method of the 'crank' and 'cylinder' corresponding to items 103 and 105 of Drawing 1.
[0020] 301 crank. The part that engages the cylinder is a large hexagon, and the part that engages the cam is a small hexagon.
[0021] 302 semicircular cam. The crank passes through the center and is spaced a few millimeters apart from the cylinder.
[0022] 303 Cylinder. A crank runs through the center of the cylinder. The outer curvature of the cylinder is grooved in three dimensions to allow rotation along the stator.
[0023] 304 stator.
[0024] Drawing 4. Perspective drawing to help understand the 'semicircular cam' corresponding to item 102 of Drawing 1.
[0025] 401 intake and exhaust timing control cam. The inner circle is a perfect circle, and the outer circle is a semicircle. This creates a compression space for the intake gas, allowing the valve to be operated by only half a turn.
[0026] 402 Cam Fixing Bolt Insert
[0027] 403 Outer cylinder part of the crank (the thinnest circular part)
[0028] 404 Cam retaining portion of crank (second thinnest, this prevents the cam from hitting the cylinder).
[0029] Cylinder penetration part of 405 crank (thickest part)
[0030] Drawing 5. An exploded view to help understand the timing valve that automatically controls the opening and closing timing of the intake and exhaust port corresponding to item 101 of Drawing 1.
[0031] 508 intake valve assembly. It is divided into legs, a waist, and a spring. (From clockwise in the figure: waist, assembly, spring, legs)
[0032] 501 The leg part of the intake valve. It rises when pressed by the cam.
[0033] The spring of the 502 valve. It pushes the two parts of the valve to maintain the open / closed state.
[0034] 503 A screw thread that causes the leg part of the intake valve to rotate when it rises to a certain height and engages with the 504 item.
[0035] 504 Screw threads that engage with item 503 in the waist part of the intake / exhaust valve to allow rotation of the leg part
[0036] 505 Screw thread that causes the raised leg part to rotate when lowered to engage with item 506
[0037] Screw threads that allow the 506 leg piece to rotate and engage with the 505 piece as it descends.
[0038] 507 There are intake and exhaust holes in the waist part, and the same holes are also in the leg part, and the open / closed state changes each time the leg part rotates by the cam.
[0039] Explain in the order of the accompanying drawings.
[0040] The assembly of the cylinder chamber, which is not shown in the drawing, is said to divide the cylinder chamber into front and back (as in a typical engine)
[0041] In Drawing 1, the engine is configured with two cylinder chambers, one on the left and one on the right, connected by a crank. When combustion occurs in the empty space of the semicircular cam (on the opposite side of the semicircle) on the right side of the left chamber, the explosive force pushes the cylinder to the left, and at this time, the cylinder rotates along the fine grooves by the stator fixed to the cylinder chamber. As the cylinder rotates, the crank also rotates.
[0042] As the crank rotates, power is generated, and the cam inside the cylinder chamber also rotates. At this time, the cam is semicircular in shape, so it rotates 180 degrees during one rotation. In order to enable a four-stroke, the cam-specific valve closes the valve hole when the number is odd and opens the hole when the number is even, so that intake and exhaust occur only once every two revolutions. In addition, to prevent the cam from scraping the cylinder, the crank needs a separate shape for the cam (a hexagonal shape slightly smaller than the cylinder contact area), and to prevent the cam from scraping the crank, a slight protrusion is placed at the center of the cam.
[0043] Through this process, the cylinder moves left and right within the chamber, and since the empty space on both the left and right can be utilized by the cams and valves mounted on the left and right of each chamber, two cylinders are possible with one cylinder and cylinder chamber. This makes four cylinders possible with two chambers and two cylinders, and the volume and weight are reduced just by the cylinder chamber, and the volume and weight are reduced again by eliminating the crank-rod, crank-cam, and crank-chamber.
[0044] During assembly, place the part with the stator hole in the two chambers, then place the crank, which is combined with the valve cam and cylinder. Align the cam and cylinder with the chamber firing order. Cover the remaining part of the chamber and secure the two parts. (Detailed sealing follows the method used on conventional engines.) Attach the timing valve and ignition device to the chamber.
[0045] If this isn't optimal, the cylinder can be reduced in weight by not having grooves in the cylinder chamber and by drilling grooves into the cylinder chamber. However, this results in a heavier and larger cylinder during assembly. Furthermore, it might not be a bad idea to omit the timing valve and instead use the conventional method of placing the cam externally.
[0046] Means of transportation where the center of gravity design is important, such as airplanes, ships, and automobiles
[0047] Generators can be sized from small to large by connecting single-size cylinders.
[0048] Also, if an external power source is used, it can be operated as a pump (instead of an engine) with the same engine structure.
Claims
1. An engine that produces rotational motion by directly rotating a cylinder that performs linear reciprocating motion. 2.1 A cylinder chamber having a stator for fixing the direction of movement of the cylinder and a hole for using the stator. 3.1 Crank with three different shapes that pass through the cylinder, cam and cylinder chamber In paragraph 4.1, a cam that rotates together with the crank inside the cylinder In clause 5.4, an intake and exhaust valve dedicated to an internal rotating cam that enables a 4-stroke by making the cam 1 / 2 open (1 turn open when 2 turns) and 1 / 4 open (1 / 2 turn open when 2 turns)
Citation Information
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