Patent ID: 6561159
Filing Date: 2003-05-13
Classification: F02B

Abstract:
A crankcase inducted self-supercharging four-cycle internal combustion engine comprising:a) at least one cylinder pair having two pistons arranged in a 360-degree crank throw, whereby both of said pistons in said cylinder pair rise and fall together, wherein each of said two pistons is operably installed in a single cylinder within said cylinder pair; b) a crankcase, operably attached to said cylinder pair; c) an intake manifold, attached to said cylinder pair; d) a first inlet tube, having a first end fixedly attached to said crankcase and having an opening therein to permit a flow of air therebetween, and also having a second end fixedly attached to said intake manifold and having an opening therein to permit a flow of air therebetween; e) a second inlet tube, having a first end fixedly attached to said crankcase and having an opening therein to permit a flow of air therebetween, and also having a second end fixedly attached to said intake manifold and having an opening therein to permit a flow of air therebetween; f) a one-way valve, installed in said first end of said first inlet tube, to draw a quantity of air into a crankcase on the upstroke of the two pistons; g) a first two-way valve operably installed in said intake manifold, in operable contact with said first inlet tube, wherein when said first two-way valve is in a first position, the cylinder pair is naturally aspirated through said intake manifold, and when said first two-way valve is in a second position, air entering into said intake manifold is directed into said crankcase through said first inlet tube during a compression stroke of one of cylinders in said cylinder pair; and h) a second two-way valve operably installed in said intake manifold in operable contact with said second inlet tube, wherein when said second two-way valve is in a first position, the cylinder pair is naturally aspirated through said intake manifold, and when said second two-way valve is in a second position, air is drawn from said crankcase into said intake manifold through said second inlet tube during an intake stroke of one of cylinders in said cylinder pair.