Cooling mechanisms for rotary valve cylinder engines

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising at least one passage formed in the rotary valve cylinder through which, in use, cooling fluid flows, wherein the rotary valve cylinder comprises a circular top surface which closes one end of the rotary valve cylinder to define a combustion chamber between the underside of the top surface and the top of a piston located inside the rotary valve cylinder, the cooling fluid being forced over the circular top surface of the rotary valve cylinder to cool the circular top surface of the rotary valve cylinder.

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising at least one passage formed in the rotary valve cylinder through which, in use, cooling fluid flows, wherein the rotary valve cylinder comprises a circular top surface which closes one end of the rotary valve cylinder to define a combustion chamber between the underside of the top surface and the top of a piston located inside the rotary valve cylinder, the cooling fluid being forced over the circular top surface of the rotary valve cylinder to cool the circular top surface of the rotary valve cylinder, wherein the outer cylindrical valve element is provided with cooling means operative to transfer thermal energy from the fluid to the outer cylindrical valve element and into the air surrounding the second cylindrical valve element.

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising a heat sink mounted directly to an upper part of the rotary valve cylinder so as to rotate with the rotary valve cylinder, the heat sink being otherwise exposed to the open air.

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising thermal insulation means at an inner surface of the valve port formed on the outer cylindrical valve element, the thermal insulation means being operative to minimize the thermal energy transferred between the outer cylindrical valve element and any gas flowing through the port.

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising at least one passage formed in the rotary valve cylinder through which, in use, cooling fluid flows, the cooling mechanism further comprising thermal insulation means at an inner surface of the valve port formed on the outer cylindrical valve element, the thermal insulation means being operative to minimize the thermal energy transferred between the outer cylindrical valve element and any gas flowing through the port.

A cooling mechanism for a rotary valve cylinder engine comprising a rotary valve cylinder rotatably mounted within an outer cylindrical valve element, the rotary valve cylinder and the outer cylindrical valve element each being formed with a respective valve port, the rotary valve cylinder being rotatable relative to the outer cylindrical valve element to a position in which the ports are aligned, the cooling mechanism comprising a heat sink mounted directly to an upper part of the rotary valve cylinder so as to rotate with the rotary valve cylinder, the heat sink being otherwise exposed to the open air, the cooling mechanism further comprising thermal insulation means at an inner surface of the valve port formed on the outer cylindrical valve element, the thermal insulation means being operative to minimize the thermal energy transferred between the outer cylindrical valve element and any gas flowing through the port.