Resources Contact Us Home
Cooling system for construction machine

Image Number 12 for United States Patent #7685816.

A cooling system for a construction machine, which can reduce noise of a cooling fan and can reliably produce cooling air at a required flow rate.The cooling system comprises a cooling fan 25 for producing cooling air introduced to an intercooler 22, a radiator 23 and an oil cooler 24, a fan hydraulic motor 26 for driving the cooling fan 25, a fan hydraulic pump 27 for delivering a hydraulic fluid to the fan hydraulic motor 26, an air temperature sensor 31 for detecting an air temperature T.sub.1 at an outlet of the intercooler 22, a cooling water temperature sensor 33 for detecting a temperature T.sub.2 of cooling water for the radiator 23, a working oil temperature sensor 36 for detecting a temperature T.sub.3 of working oil for the oil cooler 24, and a controller 29 for outputting a control signal corresponding to a maximum value among calculation values N.sub.1, N.sub.2 and N.sub.3 of cooling fan rotation speed, which correspond respectively to detected values T.sub.1, T.sub.2 and T.sub.3 from the air temperature sensor 31, the cooling water temperature sensor 33 and the working oil temperature sensor 36.

  Recently Added Patents
Instantaneous single click perpetual date mechanism
Depth estimation apparatus and method
Herbicide composition having improved effectiveness, method of preparation and use
Discharge circuit and method
Signal processing apparatus and methods
Crystalline form of zofenopril calcium
SRAM cells using shared gate electrode configuration
  Randomly Featured Patents
Automatic expansion of an advertisement offer inventory
Weapon holsters having one-piece construction
Manual cutting wheel
Etching of aluminum capacitor foil
Combined pen, watch and tire pressure gauge
Flexible, hydrocarbon-resistant polyarylenesulfide compounds and articles
Dual actuation master cylinder
Elastic pant
Applicator unit for a product of a pasty or powdery consistency such as lip rouge