| 摘要 |
<p>A cooling system has a radiator for cooling coolant of an automotive engine, cooling fan for cooling the coolant in the radiator, and a thermostat for controlling coolant temperature. The thermostat has a housing having a flange, an actuating rod secured to the housing at a first end thereof, a guide member slidably mounted on the actuating rod, a resilient seal spool provided around a second end portion of the actuating rod and secured to the guide member, a heat sensitive cylinder housing the seal spool and secured to the guide member, wax pellets provided in the heat sensitive cylinder to enclose the seal spool. The flange having at least one hole so as to pass the coolant, resulting the spring constant of return spring reduced in half and thickness of the resilient seal spool set between 25% and 5 % of the diameter of the actuating rod; and further a cooling fan switch linked to the thermostat through the electronic control system, thereby turn an upper limit of the coolant to an extremely low temperature. <IMAGE></p> |
