Patent GB-125154-A (GB)
IPC: F02B1/00
Abstract: 125,154. Ruston, J. S., and Chorlton, A. E. L. June 19, 1916. Compression engines; charge, cooling; forcing- apparatus for gases.-In a two, four, or six stroke cycle engine, a main charge or an auxiliary charge is introduced by the pressure of burnt gases discharged from a working cylinder. Fig. 1 shows a four-stroke-cycle engine having revolving radial cylinders and using, as an auxiliary charge, air which is introduced through piston-controlled ports F by burnt gases escaping through the terminal ports G of an adjacent cylinder. Air charges for the cylinder A are admitted through the ports F and conveyed by centrifugal force to a chamber J having a valve K<1> held normally to its seat J<4> by a spring K<2>. Burnt gases escaping through the ports G of the cylinder A<1> traverse an annular space J<2>, which opens into the chamber J through ports J<8>, and force the air into the cylinder A through the ports F. Air may be circulated by centrifugal force through pipes, (not shown), to cool the chambers J. A stationary four-stroke-cycle engine with four vertical cylinders is described in which a common chamber is provided for the outside cylinders and a second chamber for the inside cylinders, both chambers being cooled and charged with air or combustible mixture by a fan or pump. The cylinders each have one set of terminal ports through which burnt gases are discharged and through which air or mixture is admitted at the end of a suction stroke. Communication between the delivery passage of the fan and the air or mixture chambers is controlled by lift valves. In a six-stroke-cycle engine with radial revolving cylinders, the whole of the burnt gases is discharged through a pair of valves in the cylinder head; the valve casing opens into the atmosphere and also to a cooled passage or chamber connected to the terminal air admission ports of another cylinder. The passage or chamber is charged with air by centrifugal force when the valve casing is open to the atmosphere. By omitting the two extra strokes, this engine may work on a four-stroke cycle. In a stationarycylinder engine, the front ends of the cylinders may serve as pumps to charge or cool the air chambers in which baffles may be provided to prevent violent entry into the cylinders of the additional charges. In each of the above constructions, the charge entering through the terminal ports forms a layer adjacent the piston and in the event of burnt gases passing in behind the charge, these gases form a layer behind the air or combustible mixture. A single-cylinder engine which may work either on a two- or a four-stroke-cycle is also described. When working on a two-stroke cycle, burnt gases escape through a piston-controlled port into a storage chamber which communicates through a mechanically-actuated valve with a second chamber containing air or combustible mixture supplied by a fan or pump. The charge is forced into the cylinder by the stored burnt gases at a convenient point in the cycle. When working on a four-stroke cycle, the main charge may be drawn in as is usual or it may be forced in by the fan or pump referred to above, an additional charge being introduced by the pressure of the stored burnt gases.