GB563749A - Improvements in or relating to internal combustion engines operating on the two-stroke cycle - Google Patents

Abstract

563,749. Exhaust arrangements for internal-combustion engines. SULZER FRERES SOC. ANON. Oct. 21, 1942, No. 14753. Convention date, Nov. 21, 1941. [Class 7 (ii)] In a multi-cylinder two-stroke internal-combustion engine each cylinder 17 is formed with two opposed exhaust passages 20, 21 leading from it, either passage being closable by a cover 24, Fig. 3, according to the side of the engine from which the exhaust is to be taken. In an opposed piston engine the exhaust ports 13 are controlled by the piston 1. Manifolds 14, 15 are provided, one on each side of the engine, and in conveying the exhaust to an exhaust gas turbine 16 the cylinders are connected to the manifolds in such a way that there is minimum interference between the exhaust of different cylinders. The covers 24 which cover the exhaust passages not required are shaped, as shown at 26, to direct the gas flow. The ports 13 in the cylinder liners are adapted for one direction of exhaust flow and may be rotated, Fig. 3, according to which of the passages 20, 21 is in use. In a modification, Fig. 5, each manifold comprises separate ports 28, 29 and 30, 31 connected to various cylinders so as to provide minimum interference and the cover members extend into close proximity with an unported part of each cylinder liner to obtain a freer flow of exhaust. In another modification, Fig. 7, manifolds 33, 34 on opposite sides of the engine direct exhaust flow in opposite directions, two turbines being preferably employed. The turbine can transmit power to the central gear 11, Fig. 1, of the engine or it may drive a compressor which may also be coupled by gearing to the engine.