TH93449B - Internal combustion engine - Google Patents

Abstract

------12/05/2020------(OCR) Page 1 of Number 1 page Summary of Invention Internal combustion engine (10) includes a cylinder block (54) which contains the cylinder chamber (74) which is fitted with the piston (72) and a cylinder head (56) which holds the valve action mechanism (90) which is attached to the cylinder block (54). A number of cooling fins (84) are formed on the outer perpendicular surface of the cylinder block (56) in a direction intersecting with the axial direction of the cylinder (74). The cylinder head (56) includes, on the sides of the cylinder block (54), an opening (266) is made in the outer perpendicular surface of the cylinder head (56) to the cooling fins (84). ------------

Claims (1)

------12/05/2020------(OCR) Page 1 of 2 pages of Claims 1. Internal combustion engine (10) which consists of at least one cylinder (74) which is provided with at least one piston (72) which is designed to pass through oscillatory motion. The valve acting mechanism (90) is configured to control the flow of air into and out of cylinder (74), the cylinder block (54) which holds the cylinder (74), and the cylinder head (56) which holds the valve acting mechanism (90) and is attached to the cylinder block (54), where a number of cooling fins (84) are formed on the outer surface of the cylinder block (56) in a direction intersecting the axial direction of the cylinder (74) and cylinder head (56), as well as on the sides of the cylinder block (54) of the cylinder head (56), an opening (266) is opened in the outer surface of the cylinder head (56) to the cooling fins (84). 2. The internal combustion engine (10) in accordance with claim 1, which is further incorporated with a spark plug (96) which is attached to the cylinder head (56) so that it faces the combustion chamber (102) formed by the cylinder (74) and cylinder head (56), where the cylinder head (56) is provided with an intake port (104). For the intake of air from the outside to the combustion chamber (102), the exhaust port (260) for the discharge of exhaust gases from the combustion chamber (102) to the outside, the air jacket (268) which is designed to allow the side of the spark plug (96), the side of the intake port (104) and the side of the exhaust port (260) to come into contact with the outside, and the opening (266) opens from the air jacket (268) to the cooling fins (84). 3. Internal combustion engine (10) in accordance with claim 1 or 2, which is further incorporated. Crankshaft (68) for converting the oscillatory motion of the cylinder (72) into rotational motion, and the crankcase (52) which is provided for the crankshaft (68) where the internal combustion engine (10) is mounted on the vehicle (12), the cylinder (74) is projected upward and forward from the front part of the crankcase (52), and the axis of the cylinder (74) is tilted forward and upward from the horizontal. Page 2 of 2 of 4. Internal combustion engine (10) under any of the claims 1 through 3, where the internal combustion engine (10) is mounted on the vehicle (12), and the opening (266) is formed in the cylinder head (56) in the forward and rear directions. 5. Internal combustion engine (10) under any of the claims 1 through 4. Where the internal combustion engine (10) is mounted on the vehicle (12) and the opening (266) is formed in the cylinder head (56) on the downward side of the cylinder (74) ------------