Engine
AssigneeTwo Stroke Developments Limited
InventorPaul Fredric Ellis
Life of this patent
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Abstract
An internal combustion engine comprises a movable piston (2), at least one inlet port (21a, 21b) for a working fluid, at least one transfer/scavenging port (14) for a working fluid, internally to a working space, and at least one exhaust port (16) from the working space, in which the said at least one transfer/scavenging port (14) is provided with closure means including a reciprocatable sleeve (1) which is parallel to the axis of and linked synchronously with, the piston movement.
Claims49
An internal combustion engine comprising:
- a movable piston reciprocatable within a cylinder;
- at least one inlet port for a working fluid;
- at least one transfer/scavenging port for a working fluid, leading to a working space;
- and
- at least one exhaust port from the working space;
- wherein at least one of said ports is provided with a closure means, the closure means including a reciprocatable sleeve arranged to reciprocate parallel with axis of the piston movement;
- wherein the engine further comprises a single camshaft assembly having combined function of reciprocating the sleeve and inducing a period of dwell of the piston during cycle of the piston movement.
An internal combustion engine comprising:
- a movable piston reciprocatable within a cylinder;
- at least one inlet port for a working fluid;
- at least one transfer/scavenging port for a working fluid, leading to a working space;
- and
- at least one exhaust port from the working space;
- wherein the at least one exhaust port is provided with a closure means, the closure means including a reciprocatable sleeve arranged to reciprocate parallel with the axis of the piston movement;
- wherein timing of porting events during cycle of piston movement is controllable by reciprocation of the reciprocatable sleeve;
- wherein the engine is configured so that the at least one exhaust port is uncovered by the reciprocatable sleeve substantially as the piston arrives in a bottom dead center position within the cylinder;
- and
- wherein the engine further comprises a common camshaft assembly having combined function of reciprocating the reciprocatable sleeve and inducing a period of dwell of the piston during the cycle of the piston movement.
An internal combustion engine comprising:
- a movable piston reciprocatable within a cylinder;
- at least one inlet port for a working fluid;
- at least one transfer/scavenging port for a working fluid, leading to a working space;
- and
- at least one exhaust port from the working space;
- wherein at least one of said ports is provided with a closure means, the closure means including a reciprocatable sleeve arranged to reciprocate parallel with axis of the piston movement;
- and
- wherein reciprocal motion of the reciprocatable sleeve is linked to reciprocal motion of the piston via a common camshaft.
An internal combustion engine comprises comprising:
- a movable piston, reciprocatable within a cylinder;
- at least one inlet port for a working fluid;
- at least one transfer/scavenging port for a working fluid, leading to a working space;
- and
- at least one exhaust port from the working space;
- and
- at least one shaft;
- wherein at least one of said ports is provided with a closure means including a reciprocatable sleeve arranged to reciprocate linearly and parallel with axis of the piston movement;
- wherein the engine further comprises at least one cam for inducing a period of dwell of the piston and comprises a sleeve driving mechanism for reciprocating the linear reciprocatable sleeve, the sleeve driving mechanism comprising
- at least one further cam for inducing reciprocating movement of the sleeve;
- and
- wherein the at least one cam and the at least one further cam are located on the at least one shaft.
Dependencies are inferred from the claim text.