Rotary valve engine system

A cylinder head assembly for a cylinder of a four stroke internal combustion engine, comprising:

• a lower cylinder head member, wherein the lower cylinder head member includes an area defining a first exhaust port and a first intake port formed therein;
• an upper cylinder head member, wherein the upper cylinder head member includes an area defining a second exhaust port and a second intake port formed therein;
• wherein the lower and upper cylinder head members are brought into engagement with one another so as to define a through bore therebetween, wherein the first and second exhaust ports are axially aligned with one another when the lower and upper cylinder head members are brought into engagement with one another, wherein the first and second intake ports are axially aligned with one another when the lower and upper cylinder head members are brought into engagement with one another;
• a cylindrical housing having an area defining a circular through bore extending therethrough, wherein a first surface of the housing includes an area defining a third exhaust port and a third intake port formed therein, wherein a spaced and opposed second surface of the housing includes an area defining a fourth exhaust port and fourth intake port formed therein, wherein the first, second, third and fourth exhaust ports are axially aligned with one another when the lower and upper cylinder head members and housing are brought into engagement with one another, wherein the first, second, third and fourth intake ports are axially aligned with one another when the lower and upper cylinder head members and housing are brought into engagement with one another;
• a cylinder head member, wherein the cylinder head member includes a first area defining a first exhaust port and a first intake port formed on an upper surface thereof, and a second are defining a second exhaust port and a second intake port formed on a lower surface thereof;
• wherein the cylinder head member includes an area defining a circular through bore, wherein the first and second exhaust ports are axially aligned with one another and are in fluid communication with the circular through bore, wherein the first and second intake ports are axially aligned with one another and are in fluid communication with the circular through bore;
• an intake rotor assembly including an intake rotor body, a first intake rotor shell portion, a second intake rotor shell portion, wherein the first and second intake rotor shell portions include a semi-circular convex outer surface, wherein the intake rotor assembly is rotatably received in the circular through bore of the housing, wherein the intake rotor assembly is coaxially aligned with the circular through bore of the housing;
• wherein the intake rotor body includes an area defining a through bore extending therethrough, wherein the through bore of the intake rotor body includes a first open end and a spaced and opposed second open end, wherein the first and second intake rotor shell portions are in direct opposition to one another so as to envelope a portion of the intake rotor body, wherein when the first and second intake rotor shell portions are in direct opposition to one another a non-linear air gap including at least one chamfered surface at a terminal portion is formed on a surface of the first intake rotor shell portion, wherein a port is formed on a surface of the first intake rotor shell portion, wherein a port is formed on a surface of the second intake rotor shell portion, wherein the port of the first intake rotor shell portion is axially aligned with the first open end of the through bore of the intake rotor body, wherein the port of the second intake rotor shell portion is axially aligned with the second open end of the through bore of the intake rotor body, wherein the intake rotor body and the first and second intake rotor shell portions jointly rotate so that the first and second open ends of the through bore of the intake rotor body and the ports of the first and second intake rotor shell portions are in fluid communication with the first, second, third and fourth intake ports;
• and
• an exhaust rotor assembly including an exhaust rotor body, a first exhaust rotor shell portion, a second exhaust rotor shell portion, wherein the first and second exhaust rotor shell portions include a semi-circular convex outer surface, wherein the exhaust rotor assembly is rotatably received in the circular through bore of the housing, wherein the exhaust rotor assembly is coaxially aligned with the circular through bore of the housing;
• wherein the exhaust rotor body includes an area defining a through bore extending therethrough, wherein the through bore of the exhaust rotor body includes a first open end and a spaced and opposed second open end, wherein the first and second exhaust rotor shell portions are in direct opposition to one another so as to envelope a portion of the exhaust rotor body, wherein when the first and second exhaust rotor shell portions are in direct opposition to one another an air gap is formed between opposed edge surfaces of the first and second exhaust rotor shell portions, wherein a port is formed on a surface of the first exhaust rotor shell portion, wherein a port is formed on a surface of the second exhaust rotor shell portion, wherein the port of the first exhaust rotor shell portion is axially aligned with the first open end of the through bore of the exhaust rotor body, wherein the port of the second exhaust rotor shell portion is axially aligned with the second open end of the through bore of the exhaust rotor body, wherein the exhaust rotor body and the first and second exhaust rotor shell portions jointly rotate so that the first and second open ends of the through bore of the exhaust rotor body and the ports of the first and second exhaust rotor shell portions are in fluid communication with the first, second, third and fourth exhaust ports.

A cylinder head assembly for a cylinder of a four stroke internal combustion engine, comprising:

• a cylinder head member, wherein the cylinder head member includes a first area defining a first intake port formed on a first upper surface thereof and a second intake port formed on a first lower surface thereof, wherein the cylinder head member includes a second area defining a first exhaust port formed on a second upper surface thereof and a second exhaust port formed on a second lower surface thereof;
• wherein the cylinder head member includes an area defining a first circular through bore and a second circular through bore, wherein the first and second intake ports are axially aligned with one another and are in fluid communication with the first circular through bore, wherein the first and second exhaust ports are axially aligned with one another and are in fluid communication with the second circular through bore;
• an intake rotor assembly including an intake rotor body, a first intake rotor shell portion, a second intake rotor shell portion, wherein the first and second intake rotor shell portions include a semi-circular convex outer surface, wherein the intake rotor assembly is rotatably received in the first circular through bore of the cylinder head member, wherein the intake rotor assembly is coaxially aligned with the first circular through bore of the cylinder head member;
• wherein the intake rotor body includes an area defining a through bore extending therethrough, wherein the through bore of the intake rotor body includes a first open end and a spaced and opposed second open end, wherein the first and second intake rotor shell portions are in direct opposition to one another so as to envelope a portion of the intake rotor body, wherein when the first and second intake rotor shell portions are in direct opposition to one another a non-linear air gap including at least one chamfered surface at a terminal portion is formed between opposed edge surfaces of the first and second intake rotor shell portions, wherein a port is formed on a surface of the first intake rotor shell portion, wherein a port is formed on a surface of the second intake rotor shell portion, wherein the port of the first intake rotor shell portion is axially aligned with the first open end of the through bore of the intake rotor body, wherein the port of the second intake rotor shell portion is axially aligned with the second open end of the through bore of the intake rotor body, wherein the intake rotor body and the first and second intake rotor shell portions jointly rotate so that the first and second open ends of the through bore of the intake rotor body and the ports of the first and second intake rotor shell portions are in fluid communication with the first and second intake ports;
• and
• an exhaust rotor assembly including an exhaust rotor body, a first exhaust rotor shell portion, a second exhaust rotor shell portion, wherein the first and second exhaust rotor shell portions include a semi-circular convex outer surface, wherein the exhaust rotor assembly is rotatably received in the second circular through bore of the cylinder head member, wherein the exhaust rotor assembly is coaxially aligned with the second circular through bore of the cylinder head member;
• wherein the exhaust rotor body includes an area defining a through bore extending therethrough, wherein the through bore of the exhaust rotor body includes a first open end and a spaced and opposed second open end, wherein the first and second exhaust rotor shell portions are in direct opposition to one another so as to envelope a portion of the exhaust rotor body, wherein when the first and second exhaust rotor shell portions are in direct opposition to one another an air gap is formed between opposed edge surfaces of the first and second exhaust rotor shell portions, wherein a port is formed on a surface of the first exhaust rotor shell portion, wherein a port is formed on a surface of the second exhaust rotor shell portion, wherein the port of the first exhaust rotor shell portion is axially aligned with the first open end of the through bore of the exhaust rotor body, wherein the port of the second exhaust rotor shell portion is axially aligned with the second open end of the through bore of the exhaust rotor body, wherein the exhaust rotor body and the first and second exhaust rotor shell portions jointly rotate so that the first and second open ends of the through bore of the exhaust rotor body and the ports of the first and second exhaust rotor shell portions are in fluid communication with the first and second exhaust ports.