Cold air super-charged internal combustion engine, working cycle and method

An internal combustion engine, comprising an engine block defining at least one cylinder therein, a first inlet port and a second inlet port communicating between said cylinder and a source of air, an exhaust port through which exhausted gases are expelled from said cylinder, a piston movably mounted within said cylinder, at least one compressor in fluid communication via a conduit between said source of air and at least said second port;

• said second port being open only while said first port is closed, said engine further comprising a cooler operatively connected between said second port and an outlet to said at least one compressor;
• and said engine being further characterized by a power cycle having an effective compression ratio lower than or equal to the expansion ratio and by the presence in the cylinder of a cool, dense, heavy air charge which charge was pre-compressed and pre-cooled outside the cylinder and was introduced into the cylinder at some point after the compression process has begun.

The engine of 15, wherein said piston moves through at least an intake stroke and a compression stoke, said engine further comprising control mechanism selectively timed to close said first port prior to completion of the piston intake stroke.

An internal combustion engine, comprising an engine block defining at least one cylinder therein, a first inlet port and a second inlet port communicating between said cylinder and a source of air, an exhaust port through which exhausted gases are expelled from said cylinder, a piston movably mounted within said cylinder, at least one compressor in fluid communication via a conduit between said source of air and at least said second port;

• said second port being open only while said first port is closed, said engine further comprising a cooler operatively connected between said second port and an outlet to said at least one compressor;
• and wherein said piston moves through at least an intake stroke and a compression stoke, said engine further comprising control mechanism selectively timed to close said first port at a point selected from the group consisting of a point prior to the completion of the piston intake stroke and a point after the compression stroke has begun.

An internal combustion engine, comprising an engine block defining at least one cylinder therein, a first inlet port and a second inlet port communicating between said cylinder and a source ol air, an exhaust port through which exhausted gases are expelled from said cylinder, a piston movably mounted within said cylinder, at least one compressor in fluid communication via a conduit between said source of air and at least said second port;

• said second port being open only while said first port is closed, said engine further comprising a cooler operatively connected between said second port and an outlet to said at least one compressor;
• and, wherein said second port is open during at least a portion of an intake stroke of the piston.

An internal combustion engine, comprising an engine block defining at least one chamber therein, a first inlet port and a second inlet port communicating between said chamber and a source of air, an exhaust port through which exhausted gases are expelled from said chamber, a piston movably mounted within said chamber, at least one compressor in fluid communication via a conduit between said source of air and at least said second port;

• said second port being open only while said first port is closed, said engine further comprising a cooler operatively connected between said second port and an outlet to said at least one compressor, wherein said chamber is defined by at least one chamber wall and by the piston, and wherein said first inlet port and said second inlet port communicate with said chamber through separate apertures formed in said chamber wall.