GB470272A - Improvements in or relating to a method of charging internal combustion engines with solid, pulverulent fuels - Google Patents

Abstract

470,272. Powdered - fuel engines; valves. PAWLIKOWSKI, R. Feb. 12, 1936, No. 4236. Convention date, Sept. 20, 1935. Addition to 463,283. [Classes 7 (ii) and 7 (vi)] Relates to the method of charging an internal-combustion engine with powdered fuel described in the parent Specification and consists in connecting the charging-cylinder to a control member establishing the alternate connection of the cylinder with the supply vessel and with the intermediate chamber or in arranging the charging-piston in the tubular inlet valve controlling the drawing of the fuel out of the supply vessel. In one form of apparatus, Fig. 1, an air-inlet 17 is arranged horizontally in the bottom of a supply vessel 4 and is controlled by a valve 18, and the fuel outlet is controlled by a valve 13. A turncock 30 is rotatable by means of a lever 31 to connect the vessel 4 alternately with a charging-cylinder 8 and the latter with an intermediate chamber 5. A charging-piston 7 is actuated by a rooking arm 28 the stroke of which may be varied by a screw-stop 26 set by the engine governor to determine the quantity of mixture fed to the engine, In the form shown in Fig. 2, the piston 7 is arranged inside a reciprocating tubular member 10a controlling the supply of the powder-air mixture to the chamber 8, and a valve 11a controls the outlet from the chamber 8. The members 10a, 11a, are actuated by friction from the piston 7. The valve 11a and a valve 11 controlling the outlet from the chamber 5 into the precombustion chamber 3 may both be open during the delivery stroke of the piston 7 so that the chamber 8 functions as an intermediate chamber. In a modification, Fig. 3 (not shown), the cylinder 8 functions as the intermediate chamber, and the air passage therefor is provided in the hollow stem of the valve 11 and is controlled by the movement of the piston 7 relative to the valve 11. The tubular valve 10a and the valve 11 are reciprocated by friction from the piston 7, stops set by hand or by the governor limiting the movements. In Fig. 5, the receptacle 4 is remote from the cylinder 8 and is connected by a pipe 51, and a valve 41 for controlling the supply and strength of the mixture is opened to a variable extent by a lever 45 actuated from the engine governor. Powder is admitted to the valve chamber through an opening 40, and air enters by holes 43 in a hollow valve stem 42. Due to the fact that as the valve 41 descends the powder outlet 40 increases in size and the air outlet decreases, the strength of the mixture increases with increase of load. The powder in the receptacle is stirred by means of a paddle 50 rotated by hand or mechanically, e.g. by a gear segment 48 fixed to an oscillating shaft 53. The valve 11 is replaced by two valves 11, 12 working one within the other. In a further modification, a single charging piston supplies several engine cylinders.