| 摘要 |
PURPOSE:To improve the fuel-air ratio and cooling efficiency of an engine by a method wherein the driving operation of the water pump of the titled device is changed-over to the electric motor driving via a jointing means or to the engine driving via a belt-pulley. CONSTITUTION:A rotating shaft 6 of an electric motor 5 as the first driving means is engaged and connectingly supported, via a bearing 7, to a boss hole 4A which is formed on the protruded end surface of a pump shaft 4 of a water pump 2 equipped to a cylinder block 1. A belt-pulley 8 as the second driving means is releasably supported, via a bearing 9, on an outer periphery of said pump shaft 4, also a magnetic clutch 10 is engaged into said pump shaft 4. Said magnetic clutch 10 magnetizes an armature 14A and makes it attract to a rotor 11, during an electromagnet 15A is electrified. Further, said magnetic clutch 10 joints said pump shaft 4 with said motor rotating shaft 6 via a retaining plate 12. Also said magnetic clutch 10 joints said belt-pulley 8 with said pump shaft 4 via said retaining plate 12 by the magnetizing and attraction of an armature 14B during an electromagnet 15B is electrified. |
