| 摘要 |
<p>A cooling system for an I.C. engine includes a gerotor pump coupling a drive shaft 10 to the fan blades 20. The pump is arranged to self-prime when a by-pass passage 26 connecting the pump with the reservoir is closed by initial movement of the thermostat 34 displacing a tube 36 to close port 38. When primed, the gerotor set will drive the fan at an intermediate speed. Further movement of the thermostat displaces a spool valve 26 to take waist 24 out of register with transfer path 22 so that the pump locks up and the fan is driven at a higher speed.</p> |
