Improvements in and relating to Explosion Engines

28,339. Guichard, L. J. M. Dec. 31,1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Gas or explosivevapour engines.- Two- and fourstroke - cycle multiple-impulse engines are provided with valve - controlled pockets into which combustible charges are forced during the compression strokes and released, either successively or simultaneously, during the explosion strokes. Fig. 1 shows a two-strokecycle engine in which a doubleacting air-pump e discharges into a reservoir j and a main supply pipe opening into the cylinder through a valve k. The supplementary chambers l into which portions of the charges are compressed during each up-stroke open into the cylinder through mechanically-operated valves m. The timing of the additional impulses is preferably regulated by variable cams in accordance with the engine output, When using liquid fuel, air only is compressed by the pump, but if preferred, air from the pump may be carburetted on its way to the inlet valve k, or explosive mixture itself may be drawn into the pump through valves h. The duration of opening of the exhaust port n is sufficient to allow the first portion of the incoming charge to expel the combustion products.