Patent GB-484298-A (GB)
Title: Improvements in or relating to internal-combustion engines
IPC: F02B75/02
Filed: 1936-09-03
Abstract: 484,298. Two-stroke engines. BILLING, N. P. Sept. 3. 1936, Nos. 24121, 26086, 33709, and 357(i9. [Classes 7 (ii), 7 (iii), and 7 (vi)] Valves ; carburetters.-In an engine comprising a number of units arranged around and parallel to a central axis, and each comprising a number of working pistons fixed to a common rod, an ignition distributer is centrally disposed within the engine units and carries ignition devices which are brought successively into register with ignition ports in the engine cylinders. The ignition distributer may be combined with a centrallyarranged distributer for fuel or combustible mixture. In Figs. 2a and 2b, which show the left- and right-hand halves of such an engine and should be placed end-to-end, a series of working pistons 81 are arranged in cylinders 11 and connected by hollow rods 83 to compressor pistons 82 operating in cylinders 12, the several units being arranged around a central hollow shaft 13 formed with ports 102 which supply combustible mixture to distributer rings 103 at each end of the cylinders 11, the mixture then passing through ports 107, 108 to the .opposite ends of the double-acting cylinders 11. The shaft 13 also has ports 100 connecting it to ports 98, 99 at opposite ends of the compressor cylinders 12 through distributer rings 88. The lefthand compressor cylinder 12 is supplied with air from ports 187, and the right-hand one from ports 197 leading from the inlet hood 64 of a rotary blower 57, 58, and the air is compressed through the ports 100 into the hollow shaft 13, where it is mixed with fuel supplied by a nozzle 34. The mixture is then supplied to the cylinders 11, which exhaust at 109. Electric ignition devices 112 providing a continuous hot point or spark are carried in the distributer rings 103 and co-operate with the cylinder ports 108. Scavenging-air passes from the rotary blower through the hollow piston-rods 83 and ports 113 into the cylinders 11, and also through ports 114 leading to the interiors of the pistons 81, the whole escaping through the exhaust ports. A needle valve in the fuel nozzle 34 is adjusted by a handactuated screw. A sleeve 14 surrounding the hollow shaft 13 is connected thereto by pins 15 and inclined slots formed in a collar 17 keyed to the sleeve 14, so that when the collar is moved axially by a nut 25 and lever 20, 22, the ports in the shaft 13 and the ignition devices 112 are adjusted. The piston-rods 83 are coupled to a swash plate 122. A series of such engines may be arranged around, and geared to a central shaft, and the mixture formed in the hollow shaft of each engine may be forced into a common central chamber, from which the various working cylinders are supplied. Lubricating.-Lubricant supplied by a pump to an annular space 130 is discharged through nozzles 131 into pipes 233 on the swashplate arms 122, and then passes through ducts 133 into spaces 134, surplus oil collecting in a sump 135 and returning to the pump. Cylinders receiving liquid fuel.-In another form of engine, fuel is injected into the cylinders 11, Fig. 12, through nozzles 142 by pumps 140 actuated by a cam 141.