| 摘要 |
PURPOSE:To raise the max. working gas pressure with the size and weight of engine maintained as in a conventional type machine by furnishing an aux. cylinder conpled with cylinder liner and an aux. piston in connection with said cylinder coaxially with the piston rod and by providing a pressure accumulator to energize the main piston with the aid of the aux. piston. CONSTITUTION:An aux. piston 25 is installed coaxially with the piston rod 11, being fitted in the aux. cylinder 24 slidably. On the cross-head side 10 of cylinder 24, an end face plate 24a is provided to form the ending for the cylinder 24, which constitutes together with the plate 24a and piston 25 a compartment as pressure chamber 20. This pressure chamber 20 is put in communication with a pressure accumulator 22 through a pipe 21. Raising the oil pressure in accumulator 22 and pressure chamber 20 will apply an upward force F0 to the piston 25, causing a reduction of the downward force FA owing to the working gas in the combustion chamer 13 accordingly. Thereby the force applied to the crosshead 10 works oil pressure onto the aux. piston 25 to lower from the force FAmax down to DELTAFmax raising further the max. pressure in the combustion chamber 13 accordingly. |
