Two cycle baffled piston engine with post-baffle scavenging

The method of increasing the power of a baffled piston two cycle internal combustion engine comprising a cylinder having a head at one end, a piston movable in said cylinder through alternate compression strokes toward said head and power strokes away from said head and having an end facing said head, each engine cycle having an intake-exhaust phase during a terminal portion of the piston power stroke and an initial portion of the following piston compression stroke, diametrically opposed, intake and exhaust port means in the cylinder wall which are uncovered by said piston during each said cycle phase to exhaust spent combustion gas from the cylinder through said exhaust port means and admit fuel to the cylinder through said intake port means, and an upstanding baffle on said piston end in an axial plane of the cylinder between said intake port means and the cylinder axis for deflecting toward said cylinder head fuel entering said cylinder through said intake port means during each said cycle phase to scavenge spent combustion gas from the cylinder head region, said power increasing method comprising the step of:

• directing additional fuel into the cylinder during each said cycle phase thru auxiliary intake ports which are situated at opposite sides of the cylinder between said plane and said exhaust port means and immediately adjacent said plane and open to the cylinder obliquely toward said plane and said primary intake port means, whereby said additional fuel enters said cylinder at opposite ends of said baffle and flow inwardly along the rear side of and obliquely toward said baffle and said intake port means during each said cycle phase.

In a two cycle internal combustion engine, the combination comprising:

• a cylinder having a head at one end,
• a piston movable in said cylinder through alternate compression strokes toward said head and power strokes away from said head and having an end facing said head,
• each engine cycle having an intake-exhaust phase during a terminal portion of the piston power stroke and an initial portion of the following compression stroke,
• said cylinder having at opposite sides thereof primary intake and exhaust port means in the cylinder wall situated at opposite sides of a plane passing through the cylinder parallel to the cylinder axis and located between said axis and said intake port means, said intake and exhaust port means being uncovered by said piston during each said cycle phase for exhausting spent combustion gas from the cylinder through said exhaust port means and admitting fuel to the cylinder through said intake port means, and
• said cylinder having auxiliary intake ports in the cylinder wall which are uncovered by said piston during each said cycle phase and are situated at opposite sides of the cylinder between said plane and said exhaust port means and immediately adjacent said plane, and said auxiliary ports open to the cylinder in directions obliquely toward said plane and said primary intake port means for directing fuel into the cylinder from opposite sides thereof and across said piston end in directions obliquely toward said plane and said intake port means during each said cycle phase.

The method of increasing the power of a two cycle internal combustion engine comprising a cylinder having a head at one end, a piston movable in said cylinder through alternate compression strokes toward said head and power strokes away from said head and having an end facing said head, each engine cycle having an intake-exhaust phase during a terminal portion of the power stroke and an initial portion of the following compression stroke, primary intake and exhaust port means in the cylinder wall at opposite sides of a plane passing through the cylinder parallel to the cylinder axis and located between said axis and said intake port means, said intake and exhaust port means being uncovered by said piston during each intake-exhaust phase to exhaust spent combustion gas from the cylinder through said exhaust port means and admit fuel to the cylinder through said intake port means, said power increasing method comprising the step of:

• directing additional fuel into said cylinder during each said cycle phase thru auxiliary intake ports which are situated at opposite sides of the cylinder between said plane and said exhaust port means and immediately adjacent said plane and open to the cylinder obliquely toward said plane and said primary intake port means, whereby said additional fuel enters said cylinder from opposite sides thereof and close to said plane and flows inwardly obliquely toward said plane and said primary intake means.