| 摘要 |
1,173,544. Rotary positive displacement I. C. engines. M. W. ROTARY (INTERNATIONAL) DEVELOPMENT PTY. Ltd. March 5, 1968 [March 13, 1967; April 18, 1967], No.10543/68. Heading F1F. A rotary positive displacement I. C. engine includes a rotor 3 lodged between a pair of rotors 2, 2<1> and separated therefrom by intermediate walls 12, 12<1> of a casing that is furnished with peripheral walls 4, 4<1>, 5, the rotors 2, 2<1> being employed to compress air, or fuel and air mixture, while the rotor 3 is driven by expanding products of fuel combustion so as to drive a power output shaft 1 to which each rotor is fixed. Each of the rotors 2, 2<1> carries a spring-loaded vane 8 and is engaged by a similar vane 10 that is lodged in the wall 4, or 4<1>. The rotor 3 is generally similar to each of the other rotors saving that it has two vanes 9, 9<1> and is engaged by two vanes 11, 11<1>. On the leading side of each of the vanes 8, 9, 9<1> a cavity 24, 13 or 13<1> is formed in the respective rotor such that during operation of the engine it periodically comes into register with a transfer port 17 in the adjacent wall 12, or 12<1>. An inlet port 14 is formed in each of the walls 4, 4<1> and an exhaust outlet port 15 is provided in the wall 5. In operation, air, or said mixture, is drawn into a working chamber 6, or 6<1>, associated with each of the rotors 2, 2<1>, and after undergoing compression is transferred to a space 19 adjacent the vane 11 through the corresponding cavity 24, the adjacent port 17 and the cavity 13, or 13<1>, the rotors 2, 2<1> being arranged to operate in antiphase relationship with each other so that they supply compressed air or mixture to the said space alternately and in phase with the movement of the vanes 9, 9<1> through the region of the vane 11. The fuel is ignited by a spark-plug 16 and the combustion products are expanded in a working chamber 7. A space or well 20 is charged with oil mist to effect lubrication and cooling of the piston, means (not shown) being provided for preventing compression of gases in this space by the vanes 9, 9<1>. When air only is inducted through the ports 14, fuel is injected into the space 19 through a nozzle 18. In a modification, Fig. 5 (not shown), each of the inlet ports 14 is formed in a member (25) that can be slid circumferentially of the respective wall 4, or 4<1>, so as to change the position of the port relative to the adjacent vane 10 and thereby alter the compression ratio accordingly. The engine may be adapted for compression-ignition of the fuel. |
