| 摘要 |
PURPOSE:To permit an engine to provide braking action in itself and enable a speed of the engine to be rapidly decreased, by injecting starting air into a cylinder when it is in a compression stroke while discharging compressed air in the cylinder when it is in an expansion stroke, when the reciprocating internal- combustion engine is stopped. CONSTITUTION:When a reciprocating internal-combustion engine is operated, first a starting valve 6 being opened injects starting air in a tank 3 into a cylinder 1 from a supply pipe 4 while a piston 7 starts compression. And if an internal pressure in the cylinder 1 reaches the pressure of the starting air, the starting valve 6 is closed, and the piston continues the compression. Next, an exhaust valve 5 is opened at a point of time where the piston 7 is positioned before its top dead center, discharging compressed air in the cylinder 1 from an exhaust pipe 2. In consequence, the internal pressure in the cylinder 1 decreases. Then after the top dead center, the internal pressure in the cylinder 1 decreases by a descending stroke of the piston 7 and a discharge of the compressed air, thus the engine completes its operation of one cycle after the piston moves via its bottom dead center. |
