Internal combustion engine with rotary valve assembly having variable intake valve timing

An internal combustion engine comprising:

• a block having cylindrical wall means surrounding at least one piston chamber, piston means located in said piston chamber, means operable to reciprocate the piston means in said chamber, head means connected to the block, said head means having a bore open to the piston chamber, air/fuel intake and exhaust gas passages open to said bore, a cylindrical sleeve located within said bore, said sleeve having an inside cylindrical surface surrounding a valve chamber, a first air/fuel intake port section open to the intake passage and a second air/fuel intake port section open to the intake passage, and an exhaust gas port circumferentially spaced from the intake port sections open to the exhaust gas passage, rotary valve means located in said valve chamber having a valve combustion chamber continuously open to the opening in the piston chamber and sequentially open to the first and second air/fuel intake port sections and exhaust gas port for controlling the flow of air/fuel mixture into the valve combustion chamber and the flow of exhaust gas from the valve combustion chamber and piston chamber, said sleeve having an outer surface with a circumferential groove extended over the air/fuel intake port sections, shutter means located in said groove providing separate openings between the air/fuel intake passage and the first and second air/fuel intake port sections, means for moving the shutter means relative to the sleeve to vary the size of the openings and vary the timing of the closing of the air/fuel intake port sections, and means operable to rotate the valve means in timed relation with the movement of the piston means whereby the engine has intake, compression, power and exhaust strokes.

An internal combustion engine comprising:

• a block having cylindrical wall means surrounding at least one piston chamber, piston means located in said piston chamber, means operable to reciprocate the piston means in said chamber, a head plate located on the block over the piston chamber, said head plate having an opening in communication with said chamber, head means mounted on the head plate, means securing the head means and head plate to the block, said head means having an upright bore, air/fuel intake and exhaust gas passages open to said bore, a cylindrical sleeve located within said bore, said sleeve having an inside cylindrical surface surrounding a valve chamber, an air/fuel intake port open to the intake passage, and an exhaust gas port circumferentially spaced from the intake port open to the exhaust gas passage, rotary valve means located in said valve chamber having a valve combustion chamber continuously open to the opening in the head plate and sequentially open to the air/fuel intake port and exhaust gas port for controlling the flow of air/fuel mixture into the valve combustion chamber and the flow of exhaust gas from the valve combustion chamber and piston chamber, said sleeve having an outer surface with a circumferential groove extended over the air/fuel intake port, shutter means located in said groove providing an opening between the air/fuel intake passage and the air/fuel intake port, means for moving the shutter means relative to the sleeve to vary the size of the opening and vary the timing of the closing of the air/fuel intake port, first seal means mounted on the head plate engageable with the valve means mounted on the head plate engageable with the valve means to block flow of gas into the valve combustion chamber between the valve means and the sleeve, second seal means mounted on the valve means to block flow of gas into the valve chamber between the valve means and the sleeve, and means operable to rotate the valve means in timed relation with the movement of the piston means whereby the engine has intake, compression, power and exhaust strokes.

An internal combustion engine comprising:

• a block having cylindrical wall means surrounding at least one piston chamber, piston means located in said piston chamber, means operable to reciprocate the piston means in said chamber, head means connected to the block, said head means having a bore open to the piston chamber, air/fuel intake and exhaust gas passages open to said bore, a cylindrical sleeve located within said bore, said sleeve having an inside cylindrical surface surrounding a valve chamber, an air/fuel intake port open to the intake passage, and an exhaust gas port circumferentially spaced from the intake port open to the exhaust gas passage, rotary valve means located in said valve chamber having a valve combustion chamber continuously open to the opening in the piston chamber and sequentially open to the air/fuel intake port and exhaust gas port for controlling the flow of air/fuel mixture into the valve combustion chamber and the flow of exhaust gas from the valve combustion chamber and piston chamber, said sleeve having an outer surface with a circumferential groove extended over the air/fuel intake port, shutter means located in said groove providing an opening between the air/fuel intake passage and the air/fuel intake port, means for moving the shutter means relative to the sleeve to vary the size of the opening and vary the timing of the closing of the air/fuel intake port, and means operable to rotate the valve means in timed relation with the movement of the piston means whereby the engine has intake, compression, power and exhaust strokes.

An internal combustion engine comprising:

• a block having cylindrical wall means surrounding at least one piston chamber, piston means located in said piston chamber, means operable to reciprocate the piston means in said chamber, head means connected to the block, said head means having a bore open to the piston chamber, air/fuel intake and exhaust gas passages open to said bore, a cylindrical sleeve located within said bore, said sleeve having an inside cylindrical surface surrounding a valve chamber, an air/fuel intake port open to the intake passage, and an exhaust gas port circumferentially spaced from the intake port open to the exhaust gas passage, rotary valve means located in said valve chamber having a valve combustion chamber continuously open to the opening in the piston chamber and sequentially open to the air/fuel intake port and exhaust gas port for controlling the flow of air/fuel mixture into the valve combustion chamber and the flow of exhaust gas from the valve combustion chamber and piston chamber, shutter means located adjacent said sleeve providing an opening between the air/fuel intake passage and the air/fuel intake port, means for moving the shutter means relative to the sleeve to vary the size of the opening and vary the timing of the closing of the air/fuel intake port, and means operable to rotate the valve means in timed relation with the movement of the piston means whereby the engine has intake, compression, power and exhaust strokes.