Fluid flow control method and apparatus for a positive displacement engine or compressor
AssigneePradom Limited
InventorMichel Berger
Life of this patent
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Abstract
A fluid control apparatus and method for a positive displacement engine or compressor which has a treatment chamber that communicates with a fluid admission duct and an exhaust duct via a port, and contains a piston within the treatment chamber which reciprocates between a top dead center and a bottom dead center position. The piston carries a poppet valve sealing member which is activated to provide substantially perfect sealing between the port and the treatment chamber when the piston is in the immediate vicinity of top dead center position, and is deactivated when the piston is in a position other than the immediate vicinity of the top dead center position in order to allow fluid to pass freely through the port.
Claims21
A method for providing a sealing means to control the forced flow of a fluid in a structure having at least one admission duct, at least one exhaust duct, a treatment chamber with at least one port communicating selectively with the admission duct and the exhaust duct, and a piston reciprocating in the treatment chamber between a bottom dead center position and a top dead center position, said method comprising the steps of:
- (a) providing a suitable sealing means in controlled relation to said piston for insuring substantially perfect sealing between said port and said treatment chamber when said piston is in the immediate vicinity of said top dead center position;
- (b) activating said sealing means at an appropriate moment for insuring sealing between said port and said treatment chamber when said piston is in the immediate vicinity of top dead center position;
- and
- (c) deactivating said sealing means when said piston is in a position other than in the immediate vicinity of top dead center position, in order to allow said fluid to pass through said port.
An apparatus for controlling the forced flow of a fluid in a structure having at least one admission duct, at least one exhaust duct and a treatment chamber under compression, comprising:
- (a) a treatment chamber having at least one port communicating selectively with the admission duct and the exhaust duct;
- (b) a piston reciprocating in said chamber between a bottom dead center position and a top dead center position;
- (c) a sealing means disposed in controlled relation to said piston and constructed and arranged to be selectively activated to ensure substantially perfect sealing between said port and said treatment chamber when said piston is in the immediate vicinity of its top dead center position in order to preclude passage of fluid therethrough;
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- (d) said sealing means being constructed and arranged to be deactivated when said piston is in a position other than in the immediate vicinity of its top dead center position in order to allow the fluid to pass freely through said port when entering and leaving said treatment chamber.
Dependencies are inferred from the claim text.