Patent ID: 6393841
Filing Date: 2002-05-28
Classification: F02B

Abstract:
A two-stroke type internal combustion reciprocating piston engine (100) comprising:(a) a first cylinder (120); (b) a first piston (140) reciprocally residing within said first cylinder (120), said first cylinder piston (140), being reciprocated by first reciprocating means; (c) a first cylinder intake port (380) associated with said first cylinder (120), said first cylinder intake port (380) being opened by said first cylinder piston (140) associated therewith, said first cylinder intake port (380) being open for intake approximately 30 degrees of crankshaft rotation during, a first intake-compression stroke (4A), a first power-exhaust stroke (4D), a first intake-exhaust stroke (4E), a first intake stroke (4H), a second intake-compression stroke (4J)and a first intake power-exhaust stroke (4M); (d) said first cylinder intake port (380) associated with said first cylinder (120), said first cylinder intake port (380) being closeable by said first cylinder piston (140) associated therewith, said first cylinder intake port (380) being closed for intake approximately 150 degrees of crankshaft rotation during, said first intake-compression stroke (4B), said first power-exhaust stroke (4C), said first intake-exhaust stroke (4F), said first intake stroke (4G), said second intake-compression stroke (4K) and said first intake power-exhaust stroke (4L); (e) a first cylinder exhaust port (420) associated with said first cylinder (120), said first cylinder exhaust port (420) being opened with a first cylinder exhaust valve (340), by operation of a first camming means associated therewith, said first cylinder exhaust port (420), being opened by said first cylinder exhaust valve (340), for exhaust approximately 30 degrees of crankshaft rotation, during said first power exhaust stroke (4D), and approximately 180 degrees crankshaft rotation, during said first intake-exhaust stroke (4E)(4F), said first intake stroke (4G)(4H), and said first intake power-exhaust stroke (4L)(4M), of said first cylinder piston (140); (f) said first cylinder exhaust port (420) associated with said first cylinder (120), said first cylinder exhaust port (420) being closeable with said first cylinder exhaust valve (340) associated therewith, said first cylinder exhaust port (420), being closed by said first cylinder exhaust valve (340), for exhaust approximately 180 degrees of crankshaft rotation, during said first intake-compression stroke (4A)(4B), said second intake-compression stroke (4J)(4K), and said first power exhaust stroke (4C); (g) a second cylinder (180) in communication with said first cylinder (120); (h) a second piston (200) reciprocally residing within said second cylinder (180), said second cylinder piston (200) being reciprocated by a second reciprocating means, said second cylinder piston (200) leading said first cylinder piston (140) by a predetermined phase angle approximately 0-180 degrees such that said second cylinder piston (200), is retreating from top dead center when said first cylinder piston (140) is retreating from bottom dead center; (i) a second cylinder intake port (380) associated with said second cylinder (180), said second cylinder intake port (380) being opened by said second cylinder piston (200) associated therewith, said second cylinder intake port (380) being open for intake, approximately 30 degrees of crankshaft rotation during, a second intake stroke (4P), a third intake-compression stroke (4Q), a second intake power-exhaust stroke (4T), a fourth intake compression stroke (4U) a second power exhaust stroke (4X), and a second intake-exhaust stroke (4Y); (j) said second cylinder intake port (380) associated with said second cylinder (180), said second cylinder intake port (380), being closeable by said second cylinder piston (200) associated therewith, said second cylinder intake port (380), being closed for intake approximately 150 degrees of crankshaft rotation during, said second intake stroke (4N), said third intake-compression stroke (4R), said second intake power-exhaust stroke (4S), said fourth intake-compression stroke (4V), said second power-exhaust stroke (4W), and said second intake-exhaust stroke (4Z); (k) a second cylinder exhaust port (440) associated with said second cylinder (180), said second cylinder exhaust port (440), being opened with a second cylinder exhaust valve (260), by operation of a second camming means associated therewith, said second cylinder exhaust port (440), being opened by said second cylinder exhaust valve (260), for exhaust approximately 30 degrees of crankshaft rotation, during, said second power-exhaust stroke (4X) and approximately 180 degrees of crankshaft rotation during, said second intake stroke (4N)(4P), said second intake power exhaust stroke (4S)(4T), and said second intake-exhaust stroke (4Y)(4Z) of said second cylinder piston (200); (l) said second cylinder exhaust port (440) associated with said second cylinder, said second cylinder exhaust port (440), being closeable with said second cylinder exhaust valve (260) associated therewith, said second cylinder exhaust port (440), being closed by said second cylinder exhaust valve (260), for exhaust approximately 150 degrees of crankshaft rotation, during said third intake-compression stroke (4Q) (4R), said fourth intake-compression stroke (4U)(4V) and said second power-exhaust stroke (4W); (m) a fluidic communication means (280), between said first exhaust port (420) and said second exhaust port (440); (n) a third exhaust port (300) associated with said first cylinder (120) and in fluidic communication with said first cylinder exhaust port (420), said third exhaust port (300), being closeable with a third exhaust valve (320), by operation of a third camming means associated therewith, said third exhaust port being closed by said third exhaust valve (320), for exhaust approximately 180 degrees of crankshaft rotation, during said first intake-compression stroke (4A)(4B), said first power-exhaust stroke (4C)(4D), said first intake-exhaust stroke (4E)(4F), said second intake-compression stroke (4J)(4K) and said first intake power-exhaust stroke (4L), said third exhaust port (300) being opened by said third exhaust valve (320), for exhaust approximately 180 degrees of crankshaft rotation, during said first intake stroke (4G)(4H), and approximately 30 degrees of crankshaft rotation, during, said first intake power-exhaust stroke (4M) of said first cylinder piston (140); (o) said third exhaust port (300) associated with said second cylinder (180), and in fluidic communication with said second cylinder exhaust port (440), said third exhaust port (300), being closeable with said third exhaust valve (320) associated therewith, said third exhaust port (300), being closed by said third exhaust valve (320), for exhaust approximately 180 degrees of crankshaft rotation, during said third intake-compression stroke (4Q)(4R), said second intake power-exhaust stroke (4S), said fourth intake-compression stroke (4U)(4V), said second power-exhaust stroke (4W)(4X), and said second intake-exhaust stroke (4Y)(4Z), said third exhaust port (300) being opened by said third exhaust valve (320), for exhaust approximately 180 degrees of crankshaft rotation, during said second intake stroke (4N)(4P), and approximately 30 degrees of crankshaft rotation, during said second intake power-exhaust stroke (4T), of said second cylinder piston (200); (p) said fluidic communication means (280), between said first cylinder exhaust port (420), said second cylinder exhaust port (440) and said third exhaust port (300); (q) a first fuel supply means (360), to provide a first combustible fuel to said first cylinder (120), said first combustible fuel being introduced into said first cylinder (120) during said first intake compression stroke (4B), said first combustible fuel producing first combustion gasses within said first cylinder (120) during combustion of said first combustible fuel during said first power-exhaust stroke (4C), said first combustion gasses being expelled from said first cylinder (120) during said first power-exhaust stroke (4D) and said first intake-exhaust stroke (4E)(4F), said first combustion exhaust gasses flowing to said second cylinder (180) via said first cylinder exhaust port (420), said first combustion exhaust gasses being received by said second cylinder (180) via said second cylinder exhaust port (440), during said second intake power-exhaust stroke (4S), said first combustion exhaust gasses being expelled from said second cylinder via said third exhaust port (300) during said second intake power-exhaust stroke (4T); (r) a second fuel supply means (240) to provide a second combustible fuel to said second cylinder (180), said second combustible fuel being introduced into said second cylinder (180) during said fourth intake-compression stroke (4U), said second combustible fuel producing second combustion gasses within said second cylinder (180), during combustion of said second combustible fuel during said second power-exhaust stroke (4W), said second combustion gasses being expelled from said second cylinder (180), during said second power-exhaust stroke (4X), and said second intake-exhaust stroke (4Y)(4Z), second combustion exhaust gasses flowing to said first cylinder (120), via said second cylinder exhaust port (440), said second combustion exhaust gasses being received by said first cylinder (120), via said first cylinder exhaust port (420) during said first intake power-exhaust stroke (4L), said second combustion exhaust gasses being expelled from said first cylinder (120), via said third exhaust port (300) during said first intake power-exhaust stroke (4M).