| 摘要 |
A free-piston motor with hydraulic or pneumatic energy transmission comprising at least one free-piston unit designed for intermittent operation using always the same optimal cycle comprising a compression and an expansion stroke and consisting of a cylinder (88) with at least one free piston (89) which is slidable to-and-fro therein, said piston (89) being connected to a member (90) of general plunger-like shape which is adapted to slide to-and-fro inside at least one stationarily mounted chamber member (95) and which delimits within said chamber member a first or plunger chamber (93) which is in communication with a source of pressurized fluid (103) through an operable valve member (82, a second or displacement chamber (96) which is in communication via a nonreturn valve (99) with a reservoir (100) and is connected via a second nonreturn valve (102) to an accumulator (103), and a third or buffer chamber (97) which is in open communication with said accumulator (103). Preferably the cylinder (88) contains two free pistons (89, 89') and both plunger chambers (93, 93') are in communication with said source of pressurized fluid (103) through one common operable valve member, the displacement chambers being each in communication with the accumulator via a pipe incorporating an operable valve member, or each plunger chamber (93, 93') is in communication with said source of pressurized fluid (103) through its own separate operable valve member (82, 83), so that during the waiting time after each cycle the piston positions can be corrected if necessary. |
