GB471749A - Improvements in or relating to semi-rotary engines - Google Patents

Abstract

471,749. Semi-rotary engines; stuffing - boxes. BENDIX AVIATION CORPORATION. March 9, 1936, No. 7024. Convention date, May 6, 1935. [Classes 110 (ii) and 122 (v)] An internal - combustion engine has oscillating vanes 52 which move between abutments 24, 34, the former being provided with combustion spaces 28. Shroud pieces 58 on the vanes are provided to control the exhaust ports 60. Concentric surfaces 42, 44, of the rotor, which is fixed to a shaft, form chambers 48, 74, these being shorter, axially, than the rotor. A combustible charge from a carburetter is supplied to the compression side 66, of the vanes, by way of ports 78, and delivered through ports 76 to chambers 74, thence through ports 76 to spaces between surfaces 64 and abutments 24. The incoming gases assist scavenging the working chamber while exhaust gases are passing through ports 60. The speed of the engine is controlled by manipulation of a throttle valve. Cooling jackets 186, 88, 70 are provided. Figs. 3, 5 show a modification having an engine 102, and a separate compressor 150. Gas from the compressor flows through a passage 124, ports 126, into chambers 108, is compressed by vanes 118, fired, and exhausted through ports 132. Cooling passages 122, 104 are provided. The compressor, Fig. 5, has vanes 172 in each of which a partition 182 separates two passages 184, 186. The vane carrier is supported on a fixed manifold 162 on which it oscillates, the vanes moving between abutments 154. Gas supplied by a carburetter to chambers 180 enters a compressor chamber 152 through ports 170, is compressed by a vane and forced through holes 178 and ports 164 to the interior of 162, and thus to the engine. The crank-shafts of compressor and engine are connected by linkwork in such a manner that the movable parts oscillate in reverse directions. The lengths of stroke of compressor and engine vanes may be varied by adjusting the linkage. Fig. 4 shows a sealing collar 121 pressed against the engine rotor 116, by a spring 125. Rings 127 are provided outside, and grooves 129 inside to trap any leakage fluid. Pins 131 prevent the seal from rotating. A rubber, or other suitable material, double-faced seal 135 is inserted to prevent leakage along the shaft. Fig. 8 shows a further modification wherein a mixture of fuel and air under pressure is supplied to a chamber 322 and, when through-passages 360 are aligned between ports 328, and 316 in the walls 312, the mixture passes to spaces 314. The valves 320 open under pressure to admit the mixture to a combustion chamber 358 where it is fired. Scavenging air is supplied from spaces 330, through ports 332 and 366 into the working chambers 356 to assist the passage of exhaust gases through ports 334, and dilute the rich mixture forced through valves 320. Cooling spaces 368, 372, 370, 374 are provided. A plant comprising two engines complete with compressors, is described, with a crank-shaft between, which through gearing, may drive a ship's propeller. Magnetos, oil and water pumps, are driven through bevel gearing. In other plants, six engines may be arranged around a centre crank-shaft, or two sets of four engines may be arranged side by side.