哪位高手帮忙翻译一下。谢谢啦。

sttfxinghun

The secret of the thermoatat lies in the small cylinder located on the engine-side of the device.The cylinder is filler with a wax that begins to melt at around 180’F(different thermostats oper at different tempertures,but 180’F is a common one).A rod connected to the valve presses into this wax.When the wax melts,it expands significantly,pushing the rod out of the cylinder and opening the valve.By letting engine warm uo as quickly as possible,the thermostat reduces engine wear,deposits and emissions.
  Fan
Like the thermostat,the cooling fan has to be controlled so tha it allowsa the engine ti maintain a constant temperture.
  Front-wheel drive cars have electric fans because the engine isusually mounted transversely, meaning the output of engine points toward the side of the car.The fans are controlled either with a thermostatic switch or by the engine computer,and they turn on when the temperature of the coolant does above a set point.They turn back off when the tempiter drops below that point.
  Rear-wheel drive cars with longitudinal engines usually have engine-diven cooling fans.These fans have a thermoatatically controlled viscous clutch.This clutch is positioned at the hub of the fan,in the airf;ow coning though the radiator.

wlg4321

主要是节温器的工作原理
第二段是讲风扇