EP0258511A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rotary valve internal combustion engine
Assignee: Ss Ltd KK
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Filing: 1986-10-02
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Granted: —
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Expires: 2006-10-02
Abstract
Abstract A four stroke internal combustion engine including a rotary intake valve (4) and rotary exhaust valve (5) having substantially a cylindrical shaft shape and formed with an intake port (43) and exhaust port (53) at positions corresponding to a combustion chamber (31). The intake valve (4) and the exhaust valve (5) are rotatably arranged in a cylinder head (3) so as to be adjacent the combustion chamber. The intake valve (4) is connected to a carburettor and the exhaust valve (5) is connected to an exhaust pipe. The engine also includes a rotation transmitting device for transmitting the rotation of a crankshaft (9) to the rotary valves.
Inventors
- 👤 Nobuo Harada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/02; F01L7/026; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
166 words
A four cycle internal combustion engine having at least one cylinder (1) in which an intake valve (4) and an exhaust valve (5) are arranged in a cylinder head (3) closing a combustion chamber of the engine, the intake valve (4) and the exhaust valve (5) being driven by the rotation of an output shaft (9) rotated by a piston (2), characterised in that: the intake valve comprises a first rotary valve member (4) of generally cylindrical shaft shape, the valve member (4) being rotatable about its own axis in the cylinder head (3) so as to open periodically to conduct a fuel mixture into the combustion chamber; the exhaust valve comprises a second rotary valve member (5) of generally cylindrical shaft shape, the valve member (5) being rotatable about its own axis in the cylinder head so as to open periodically to conduct exhaust gases from the combustion chamber; the first and second valve members being rotated by the rotation of the output shaft (9).
Claim 2
Dependent Claim
166 words
A four cycle internal combustion engine having at least one cylinder (1) in which an intake valve (4) and an exhaust valve (5) are arranged in a cylinder head (3) closing a combustion chamber of the engine, the intake valve (4) and the exhaust valve (5) being driven by the rotation of an output shaft (9) rotated by a piston (2), characterised in that: the intake valve comprises a first rotary valve member (4) of generally cylindrical shaft shape, the valve member (4) being rotatable about its own axis in the cylinder head (3) so as to open periodically to conduct a fuel mixture into the combustion chamber; the exhaust valve comprises a second rotary valve member (5) of generally cylindrical shaft shape, the valve member (5) being rotatable about its own axis in the cylinder head so as to open periodically to conduct exhaust gases from the combustion chamber; the first and second valve members being rotated by the rotation of the output shaft (9).
Claim 3
Dependent Claim
47 words
An internal combustion engine as claimed in Claim 1, characterised in that each of the valve members (4,5) includes an axial inner passage (42,52) opening to one axial end thereof and an opening (43,53) connecting the outer surface of each valve member with its inner passage (42,52).
Claim 4
Dependent Claim
50 words
An internal combustion engine as claimed in Claim 2 characterised in that the passages (42,52) each extend to midway along the valve members (4,5) and the openings (43,53) each extend to midway along the valve members (4,5) and the openings (43,53) are at mid positions along the valve member (4,5).
Claim 5
Dependent Claim
42 words
An internal combustion engine as claimed in any preceding claim characterised in that the rotation is transmitted from the output shaft (9) to the valve members (4,5) by means of gears (6,6a) attached to the closed ends of the valves members (4,5).
Claim 6
Dependent Claim
30 words
An internal combustion engine as claimed in any preceding claims charactersied in that the valve members (4,5) are caused to rotate at half the speed of the output shaft (9).
Claim 7
Dependent Claim
39 words
An internal combustion engine as claimed in any preceding claim characterised in that each of the valve members (4,5) includes in its outer surface a pair of ring-shaped sealing members (45,45a) arranged on axial sides of its opening (43,53).
Claim 8
Dependent Claim
48 words
An internal combustion engine as claimed in Claim 6 characterised in that each of the valve members (4,5) includes in its outer surface a pair of straight sealing members (47,47a) arranged on circumferential sides of its opening (43,53) to extend between the pair of ring-shaped sealing members (45,45a).
Claim 9
Dependent Claim
37 words
An internal combustion engine as claimed in any preceding claim characterised in that the fuel mixture is conducted to the intake valve (4) by a carburettor and the exhaust gases are expelled into an exhaust pipe (8).
Claim 10
Dependent Claim
71 words
An internal combustion engine as claimed in any preceding claims characterised in that the engine comprises a plurality of cylinders and the intake and exhaust valves (4a,5a) each comprise an elongate generally cylindrical shaft body (41a,51a) formed respectively with intake ports (43a to 43n) and exhaust ports (53a to 53n) which are shifted in phase relative to each other in accordance with the firing sequence of the cylinders (1a to 1n).
References Cited (Backward Citations)
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