GB190622200A - Improved Method for Introducing the Combustible into a Two-stroke Cycle Internal Combustion Engine, and Apparatus therefor. - Google Patents

Abstract

22,200. S÷hnlein, H. Oct. 8. Gas and explosivevapour engines. - In two-stroke-cycle engines, the combustible fuel is injected at the beginning of the compression stroke through an orifice in the cylinder wall controlled by the piston. In the engine shown in Fig. 1, air is supplied to the cylinder from the crank casing 5 through passages 8, 9 and a port 7. Instead of the crank casing, a separate pump may be used. The piston 6 closes the exhaust port 10 a little before the fuel inlet orifice 1<a>, so that fuel is injected for a short period into air under slight pressure only. With this arrangement. the nozzle 1<a>, which may be shaped so as to completely atomize the fuel, is subjected to very little pressure and heat, and the chances of its becoming stopped up are small. There may be several inlet ducts such as 1<a> for the injection of several combustibles and a similar duct may be used for injecting water, or several passages 3 with check valves 2 may lead to one inlet nozzle. The separate liquids may be introduced in measured proportions and under regulated pressure, and they issue from the nozzle finely divided and fully mixed. Instead of liquids, gas, with or without water or water-spray, may be injected in the manner described above. In engines having piston-controlled exhaust ports but with the air inlet in the cylinder head, the same method may be employed, the air inlet being closed first, then the exhaust ports, and finally the fuel inlet. In all the cases, the fuel nozzle is not subjected to the beat of combustion or to great pressure, and the force required to inject the fuel is small. In the modification shown in Fig. 2, the inlet passage 1 is at right-angles to the cylinder axis, along which the fuel is made to travel by a baffle 13 on the piston.