Improvements in Internal Combustion Motors
Реферат: 21,073. Dunlop, J. Sept. 27. Gas and like engines.-The front end of the cylinder of a four-stroke cycle engine is closed to compress air, and to serve as a compressed-air motor for starting. It may compress air on alternate out-strokes into two reservoirs at different pressures, the low pressure for scavenging, gas making, &c. Or, at alternate revolutions, it may be open continuously to the reservoir, the air forming a cushion. With two-cylinder engines, the front of one cylinder is constantly open to the reservoir, while the other acts as a pump and motor. For reversing, the phase of the valve gear is altered by screw gearing. Starting; valves.-The front end A of the cylinder has a single distributing-valve C, worked by a cam revolving at half the speed of the crank shaft. When it is at the middle of its stroke and the change valve H is arranged as shown, for compressing, it admits air from the inlet L through the port E, and when at the ends, as shown, the air passes by the ports F, valve G, and ports J to a reservoir K. When the change valve is at the other end of its stroke, the reservoir K is put into communication with the middle port E, and the ports F and valve G with the atmosphere through the pipe L. The two ports F may be made to lead to different reservoirs. The change valve H may be worked by air pressure, or it may be of the rotary type. Reversing; valve gear.-The admission, exhaust, and ignition valves are worked by separate shafts, which are driven by screw gearing. Fig. 2 shows the admission-valve shaft P and exhaust-valve shaft N worked by screws R, S, on the half-speed countershaft Q, which works the igniter. By shifting the screws R, S longitudinally, the shafts P, N are turned in opposite directions through about 90‹ or, if desired, 270‹. Fluid-pressure cylinders U are employed for this purpose. The screws R, S may be on different shafts.
Improvements in semi-rotary internal-combustion engines
Номер патента: GB274570A. Автор: . Владелец: FRITZ FUGMANN. Дата публикации: 1927-07-25.