Patent EP0194041A1 successfully refreshed from Google Patents.
EP0194041A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rotary valve assembly for an internal-combustion engine
Assignee: Individual
•
Filing: 1986-02-07
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Granted: —
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Expires: 2006-02-07
Abstract
Abstract A rotary valve assembly for an internal combustion engine which comprises a metallic or ceramic sealing sleeve (40) rotatably mounted inside a bore of an engine head which houses the valve assembly. The sleeve has a port (44) for periodic communication during rotation of the sleeve with inlet and outlet passages disposed in the engine head, a lower end of the sleeve being open and communicating with an engine cylinder in which a piston reciprocates and an upper end of the sleeve being sealingly closed. The sleeve is split longitudinally over its entire length by a slit (46) which is aligned with the port and a valve mechanism is disposed in the head above the upper end of the sleeve and is adapted by suitable drive trains to rotatively drive the sleeve by engaging a driving formation (48) located at the upper end of the sleeve. An exchangeable compression element (74) can be attached inside the upper end of the sleeve to a valve mechanism to set the required compression ratio of the engine. Without removing the head the sleeve can be exchanged or adjusted to vary valve timing and the element can be exchanged to vary compression ratio.
Inventors
- 👤 Gerhardus Cornelius Kriek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 12:56
CPC Classifications
F; F01; F01L; F01L7/00; F01L7/02; F01L7/028; F01L7/16; F01L2820/00; F01L2820/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A rotary valve assembly which comprises a sealing sleeve rotatively mounted inside a bore of an engine head which houses the valve assembly, the sleeve having a port for periodic communication during rotation of the sleeve with inlet and outlet passages disposed in the engine head, a lower end of the sleeve communicating with an engine cylinder in which a piston reciprocates and an upper end of the sleeve being sealingly closed, the sleeve directly exposed to a combustion cnamber which is thus formed within the sleeve, the sleeve split longitudinally over its entire length by a slit aligned with the port and a valve mechanism disposed in the nead above the upper end of the sleeve adapted to rotatively drive the sleeve by engaging a driving formation located at the upper end of the sleeve.
Claim 2
Dependent Claim
136 words
A rotary valve assembly which comprises a sealing sleeve rotatively mounted inside a bore of an engine head which houses the valve assembly, the sleeve having a port for periodic communication during rotation of the sleeve with inlet and outlet passages disposed in the engine head, a lower end of the sleeve communicating with an engine cylinder in which a piston reciprocates and an upper end of the sleeve being sealingly closed, the sleeve directly exposed to a combustion cnamber which is thus formed within the sleeve, the sleeve split longitudinally over its entire length by a slit aligned with the port and a valve mechanism disposed in the nead above the upper end of the sleeve adapted to rotatively drive the sleeve by engaging a driving formation located at the upper end of the sleeve.
Claim 3
Dependent Claim
35 words
A rotary valve assembly as claimed in claim 1, which additionally comprises an exchangeable compression element adapted to be removably attached within the upper end of the bore of the sleeve to the valve mechanism.
Claim 4
Dependent Claim
30 words
A rotary valve assembly as claimed in claim 2, in which the valve element is removably attached to the valve mechanism by a coaxial bolt passing through the valve mechanism.
Claim 5
Dependent Claim
39 words
A rotary valve assembly as claimed in claim 1, in which the driving formation at the upper end of the sleeve comprises one of a notch and a peg and the valve mechanism has a coacting formation engaging therewith.
Claim 6
Dependent Claim
48 words
A rotary valve assembly as claimed in claim 4, in which the driving formation is angularly displaced from a leading edge of the sleeve adjacent the slit by an angle which is less than half the angular displacement from a trailing edge of the sleeve adjacent the slit.
Claim 7
Dependent Claim
45 words
A rotary valve assembly as claimed in claim 1, which comprises an additional slow running port in the sleeve located above the said port, also aligned on the slit, intermittently communicating during rotation with slow running inlet and exhaust passages provided in the engine head.
Claim 8
Dependent Claim
79 words
A rotary valve assembly as claimed in claim 1, in which the valve mechanism comprises a journal led shaft and below it an integral disc terminated above the upper end of the sleeve, the disc having an upper longitudinal thrust bearing surface, a spring loaded sealing ring assembly around the circumference of the disc, the driving formation located on the lower surface of the disc and the shaft carrying a gear meshing with a gear on a drive shaft.
Claim 9
Dependent Claim
54 words
A rotary valve assembly as claimed in claim 1, in which the port in the sleeve has a shape bounded by straight upper and lower edges and convex circular left and right side edges indented towards each other, their curvature corresponding to a radius of curvature of inlet and outlet passages in the head.
Claim 10
Dependent Claim
177 words
In an internal combustion engine which includes a piston and cylinder and an engine head including an inlet and exhaust passage communicating with a bore in the head, a lower end of the bore communicating with the cylinder, a rotary valve assembly, which comprises a split sealing sleeve in the bore, spring loaded into sealing contact with the walls of the bore, a lower end of the sleeve open to the cylinder, a port provided in the sleeve aligned with the split, a valve mechanism located above an upper end of the sleeve and which comprises a disc which sealingly closes the upper end of the sleeve and carries an exchangeable compression element, the inwardly directed surfaces of the sleeve,disc and element enclosing a combustion chamber above the cylinder and fully exposed to the combustion chamber, the valve mechanism further comprising a journalled shaft joined to the disc upper surface and a valve drive train, the lower surface of the disc having inter-engaging drive formations for rotatively driving the sleeve wnich are angularly displaced from the Split.
Claim 11
Dependent Claim
177 words
In an internal combustion engine which includes a piston and cylinder and an engine head including an inlet and exhaust passage communicating with a bore in the head, a lower end of the bore communicating with the cylinder, a rotary valve assembly, which comprises a split sealing sleeve in the bore, spring loaded into sealing contact with the walls of the bore, a lower end of the sleeve open to the cylinder, a port provided in the sleeve aligned with the split, a valve mechanism located above an upper end of the sleeve and which comprises a disc which sealingly closes the upper end of the sleeve and carries an exchangeable compression element, the inwardly directed surfaces of the sleeve,disc and element enclosing a combustion chamber above the cylinder and fully exposed to the combustion chamber, the valve mechanism further comprising a journalled shaft joined to the disc upper surface and a valve drive train, the lower surface of the disc having inter-engaging drive formations for rotatively driving the sleeve wnich are angularly displaced from the Split.
References Cited (Backward Citations)
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