Engine valve means and porting

Claim 2

A variable speed, two-cycle, crankcase compression internal combustion engine comprising a cylinder, a piston movable in the cylinder, a crankcase, an intake port in the cylinder communicating with the crankcase, an intake tract in fluid communication with the intake port, a transfer passage for conducting fluid from the Crankcase to the combustion side of the piston through a transfer port in the cylinder, an exhaust port in the cylinder, the piston acting as a valve means to cover and uncover the intake port, the exhaust port, and the transfer port, a reed valve assembly mounted in the inlet tract, the reed valve assembly comprising a valve body, a port in the valve body, a primary reed for controlling the flow of fluid through the port, means securing the primary reed to the valve body, a vent formed in the primary reed, a secondary reed disposed on the valve body for controlling the flow of fluid through the vent, and port means responsive to the flow of fluid through the transfer passage for supplying fluid from the intake tract at a point downstream from the valve assembly to the transfer passage.

Claim 3

A variable speed, two-cycle crankcase compression, internal combustion engine comprising a cylinder, a piston working in the cylinder, a transfer passage in communication with the crankcase and having a port through the cylinder wall at the combustion side of the piston, an intake port through the cylinder wall positioned to provide for direct communication with the crankcase independently of the transfer passage and located below the piston when the piston is positioned to block said transfer port, a fuel intake chamber for receiving fuel from a supply source and for delivering the fuel to the intake port, a reed valve for controlling the flow through the intake chamber, and a fuel supply passage interconnecting the intake chamber downstream of said reed valve and the transfer passage.

Claim 4

A variable speed, two-cycle crankcase compression, internal combustion engine comprising a cylinder, a piston working in the cylinder, a transfer passage in communication with the crankcase and having a port through the cylinder wall at the combustion side of the piston, an intake port through the cylinder wall positioned to provide for direct communication with the crankcase independently of the transfer passage and located below the piston when the piston is positioned to block said transfer port, a fuel intake chamber for receiving fuel from a supply source and for delivering the fuel to the intake port, a reed valve for controlling the flow through the intake chamber, and a fuel supply passage interconnecting the intake chamber downstream of said reed valve and the transfer passage.

Claim 5

A variable speed, two-cycle, crankcase compression, internal combustion engine comprising a cylinder, a crankcase, an intake port in the cylinder in fluid communication with the crankcase, an intake tract in fluid communication with the intake port, valve means disposed in the intake tract for controlling the flow of fluid therethrough, a transfer port in the cylinder, a transfer passage extending between the crankcase and the transfer port for conveying fluid from the crankcase to the transfer port, and port means responsive to the flow of fluid through the transfer passage for drawing fluid from the intake tract at a point downstream from the valve means and for supplying such fluid to the transfer passage.

Claim 6

A variable speed, two-cycle, crankcase compression, internal combustion engine comprising a cylinder, a crankcase, an intake port in the cylinder in fluid communication with the crankcase, an intake tract in fluid communication with the intake port, valve means disposed in the intake tract for controlling the flow of fluid therethrough, a transfer port in the cylinder, a transfer passage extending between the crankcase and the transfer port for conveying fluid from the crankcase to the transfer port, and port means responsive to the flow of fluid through the transfer passage for drawing fluid from the intake tract at a point downstream from the valve means and for supplying such fluid to the transfer passage.

Claim 7

An engine as defined in claim 3 wherein the port means is disposed at a right angle to the axis of the transfer passage.

Claim 8

A variable speed, crankcase compression, two-cycle internal combustion engine comprising a cylinder, a crankcase in fluid communication with the cylinder, a piston working in the cylinder, an intake port in the cylinder adapted to communicate with the crankcase below the piston, an exhaust port in the cylinder, a main transfer port in the cylinder, a transfer passage adapted to provide fluid communication between the crankcase and the main transfer port, a fuel intake passage for receiving fuel from a supply source, with said intake passages generally aligned with the intake port to deliver fuel thereto, a valve assembly in the intake passage having ported valve seats arranged in inclined planes meeting along the apex line presented downstream of the fuel flow and oriented so the apex line generally parallels the axis of the cylinder, reed valves cooperating with the ported valve seats, porting in the piston skirt for establishing communication between the intake port and the crankcase and positioned to register with the intake port throughout the portion of the piston stroke when the piston skirt blocks direct communication of the intake port with the crankcase, an auxiliary transfer port for providing fluid communication between the inlet tract downstream of the valve assembly and the cylinder, and port means responsive to the flow of fluid through the transfer passage for supplying fluid from the intake tract at a point downstream from the valve assembly to the transfer passage.

Claim 9

A variable speed, crankcase compression, two-cycle internal combustion engine comprising a cylinder, a crankcase in fluid communication with the cylinder, a piston working in the cylinder, an intake port in the cylinder adapted to communicate with the crankcase below the piston, an exhaust port in the cylinder, a main transfer port in the cylinder, a transfer passage adapted to provide fluid communication between the crankcase and the main transfer port, a fuel intake passage for receiving fuel from a supply source, with said intake passages generally aligned with the intake port to deliver fuel thereto, a valve assembly in the intake passage having ported valve seats arranged in inclined planes meeting along the apex line presented downstream of the fuel flow and oriented so the apex line generally parallels the axis of the cylinder, reed valves cooperating with the ported valve seats, porting in the piston skirt for establishing communication between the intake port and the crankcase and positioned to register with the intake port throughout the portion of the piston stroke when the piston skirt blocks direct communication of the intake port with the crankcase, an auxiliary transfer port for providing fluid communication between the inlet tract downstream of the valve assembly and the cylinder, and port means responsive to the flow of fluid through the transfer passage for supplying fluid from the intake tract at a point downstream from the valve assembly to the transfer passage.

Claim 10

An engine as defined in claim 5 wherein the valve assembly incLudes a primary reed overlying the valve port, a vent in the primary reed, and a secondary reed more yieldable than the primary reed overlying the vent in the primary reed.

Claim 11

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: a cylinder; a piston working in the cylinder; transfer porting in communication with the crankcase and having an opening through the cylinder wall for supplying fluid to the combustion side of the piston; piston controlled intake porting through the cylinder wall positioned to provide for communication with the crankcase independently of the transfer porting; a fuel intake chamber for receiving fuel from a supply source and for delivering the fuel to said intake porting; reed valve means for controlling the flow of fluid through the intake chamber to the intake porting and preventing flow of fluid back through the intake chamber toward such supply source; and port means, responsive to the flow of fluid through said transfer porting, to draw fluid from the intake chamber and supply such fluid to said transfer porting, said port means having one portion communicating with said transfer porting and another portion communicating with said intake chamber downstream of said reed valve means.

Claim 12

A variable speed, two-cycle crankcase compression, internal combustion engine, comprising: a cylinder; a piston working in the cylinder; transfer porting in communication with the crankcase and having an opening through the cylinder wall for supplying fluid to the combustion side of the piston; piston controlled intake porting through the cylinder wall positioned to provide for communication with the crankcase independently of the transfer porting; a fuel intake chamber for receiving fuel from a supply source and for delivering the fuel to said intake porting; reed valve means for controlling the flow of fluid through the intake chamber to the intake porting and preventing flow of fluid back through the intake chamber toward such supply source; and port means, responsive to the flow of fluid through said transfer porting, to draw fluid from the intake chamber and supply such fluid to said transfer porting, said port means having one portion communicating with said transfer porting and another portion communicating with said intake chamber downstream of said reed valve means.

Claim 13

Apparatus in accordance with claim 7, and further characterized in that said port means comprises a conduit having an end terminating substantially flush with surrounding wall portions of said intake chamber.

Claim 14

Apparatus in accordance with claim 7, and further including auxiliary intake porting through the cylinder wall positioned to provide fluid communication between said intake chamber, downstream from said reed valve means, and said cylinder when the piston is positioned to block said intake porting.