Stratified charge system

Claim 1

A device for reducing exhaust emission of internal combustion engines having cylinder means comprising a tubular ignition chamber having a first passage therein adapted to be mounted in a spark plug hole of a cylinder means of an internal combustion engine, said first passage being communicable with the interior of a cylinder means, a spark plug mounted on the outer end of said tubular chamber and in communication with said first passage, and fuel and air metering means mounted on said tubular chamber to communicate with said first passage, said means having a flow passage therein adapted for connection to a source of air and with said first passage, a freely slidable non-spring actuated poppet check valve in said flow passage for controlling flow of air to said first passage, said poppet valve being openable only by suction in said cylinder and closable only by compression in said cylinder, said poppt valve having a valve head cooperable with a valve seat connected to said first passage, a slidable valve stem having two ends, a shank smaller in cross-sectional area than said valve stem joined to one end of said stem with the other end of said shank joined to said valve head, the effective area of the ends of said stem being so related that only pressure exerted on the stem during the compression stroke will cause the valve to close the mixing passage to the cylinder and only the vacuum on the stem during the suction stroke will cause the valve to open to admit the air to pass to said first passage, the poppet valve being actuated and timed only by the pressure and vacuum pulsations of the engine cylinder.

Claim 2

A device for reducing exhaust emission of internal combustion engines having cylinder means comprising a tubular ignition chamber having a first passage therein adapted to be mounted in a spark plug hole of a cylinder means of an internal combustion engine, said first passage being communicable with the interior of a cylinder means, a spark plug mounted on the outer end of said tubular chamber and in communication with said first passage, and fuel and air metering means mounted on said tubular chamber to communicate with said first passage, said means having a flow passage therein adapted for connection to a source of air and with said first passage, a freely slidable non-spring actuated poppet check valve in said flow passage for controlling flow of air to said first passage, said poppet valve being openable only by suction in said cylinder and closable only by compression in said cylinder, said poppt valve having a valve head cooperable with a valve seat connected to said first passage, a slidable valve stem having two ends, a shank smaller in cross-sectional area than said valve stem joined to one end of said stem with the other end of said shank joined to said valve head, the effective area of the ends of said stem being so related that only pressure exerted on the stem during the compression stroke will cause the valve to close the mixing passage to the cylinder and only the vacuum on the stem during the suction stroke will cause the valve to open to admit the air to pass to said first passage, the poppet valve being actuated and timed only by the pressure and vacuum pulsations of the engine cylinder.

Claim 3

A device for reducing engine exhaust emission of internal combustion engines having cylinder means comprising a tubular ignition chamber having a first passage therein adapted to be mounted in a spark plug hole of a cylinder means of an internal combustion engine, said first passage being communicable with the interior of a cylinder means, a spark plug mounted on the outer end of said tubular chamber and in communication with said first passage, a fuel and air metering unit mounted on said tubular chamber to communicate with said first passage, said unit having a mixing passage therein adapted for connection to a fuel source, to a source of air and with said first passage, a freely slidable poppet check valve in said mixing passage for controlling flow of air and fuel to said first passage, said poppet valve being openable by suction in said cylinder and closable by compression in said cylinder, said poppet valve having a valve element cooperable with a valve seat in said mixing passage, a slidable valve stem and a smaller shank joining said valve element and valve stem, the area of said valve element and valve stem being related so that the compression stroke will cause said valve to close the mixing passage, and a fuel metering aperture in said mixing passage, the opening of which is controlled by said valve stem.

Claim 4

A device for reducing engine exhaust emission of internal combustion engines having cylinder means comprising a tubular ignition chamber having a first passage therein adapted to be mounted in a spark plug hole of a cylinder means of an internal combustion engine, said first passage being communicable with the interior of a cylinder means, a spark plug mounted on the outer end of said tubular chamber and in communication with said first passage, a fuel and air metering unit mounted on said tubular chamber to communicate with said first passage, said unit having a mixing passage therein adapted for connection to a fuel source, to a source of air and with said first passage, a freely slidable poppet check valve in said mixing passage for controlling flow of air and fuel to said first passage, said poppet valve being openable by suction in said cylinder and closable by compression in said cylinder, said poppet valve having a valve element cooperable with a valve seat in said mixing passage, a slidable valve stem and a smaller shank joining said valve element and valve stem, the area of said valve element and valve stem being related so that the compression stroke will cause said valve to close the mixing passage, and a fuel metering aperture in said mixing passage, the opening of which is controlled by said valve stem.