Patent GB-125155-A (GB)
IPC: F02B1/00
Abstract: 125,155. Ruston, J. S., and Chorlton, A. E. L. June 19, 1910. Compression engines; charge, cooling.-In four- and six-stroke cycle engines in which combustion products or inert gases are added to the working charge at the end of the suction stroke, the extra charge is forced into one cylinder by the pressure of the combustion gases in another cylinder, or the combustion gases from one cylinder may themselves serve as the additional charge in another cylinder. In the four-stroke-cycle engine shown in Fig. 1, radial cylinders discharge a portion of their combustion gases through terminal ports B into a cooled reservoir D, the ports serving also to admit cooled combustion gases to the cylinders at the ends of the suction strokes. Exhaust valves (not shown) are located in the cylinder heads. According to a modified construction, the common reservoir D is replaced by a series of cooled pipes located between the cylinders, the ends of the pipes being connected to exhaust belts around the cylinders. In a further modification, two rows of radial cylinders are disposed in parallel planes with their pistons connected to a common crank-pin or to pins in line. The combustion gases from a cylinder in one plane are admitted to an adjacent cylinder in the other plane. A pair of adjacent cylinders may comprise a unit. The cooling chamber between each pair of cylinders may be water jacketed. An engine having one or more pairs of inclined cylinders with a cooling chamber between each pair, is also described. In the construction shown in Fig. 5, an exhaust belt E<1> around one cylinder is connected to the head of another cylinder by a cooled passage D<1> which opens into a chamber G leading to the atmosphere through a valve H and to the cylinder through a valve J. In the position of the parts shown in Fig. 5, the piston of the cylinder A has completed its suction stroke, the piston in the cylinder A' its working stroke, and the piston of the cylinder A<2> is nearing the end of its suction stroke. Combustion gases in the cylinder A<1> are forcing cooled gases in the pipe D<1> into the cylinder A and a portion of the combustion gases is entering the pipe D<1> leading to the cylinder A<2>, the valves J and H of which are closed. At the completion of the suction stroke in the cylinder A', the charge in the right-hand pipe D<1> is forced into this cylinder upon the opening of the exhaust valve J in the cylinder A<2>. By closing the front ends of the cylinders, the gases in the pipes D<1> may be drawn into the pump spaces for cooling purposes and be expelled therefrom into the pipes D<1> before entering the combustion spaces. The valves J and H may be fixed to the same spindle, in which case a. non-return valve is located in the upper end of each pipe D<1>. The chambers in which the combustion gases are stored may be cooled by air circulated by centrifugal force. An engine having eight or ten radial cylinders arranged as shown in Fig. 5 may work on a six-stroke cycle, the two idle strokes serving to draw in and expel an air charge for cooling purposes. In each of the constructions, the extra charge forms a layer behind the main charge.