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
Method of operating a split gate flash memory cell with coupling gate
Preventative traffic congestion social networking improvement system within a community
Defected ground plane inductor
Targeted gene deletions for polysaccharide slime formers
Method and system for distributing load by redirecting traffic
Utility knife
Module-code verification layer to automatically validate user input
  Randomly Featured Patents
Organic electroluminescence display apparatus, method of producing the same, and method of repairing a defect
Stringed musical instrument
Novel guanidinomethylbenzoic acid derivatives
Gate driver device for GTO thyristor
Method for determining the risk of trisomy 21 in the second trimester
Norbornene polymer comprising photoreactive functional group having halogen substituent group, process for preparing the same, and alignment layer using the same
Multi-axis, large tilt angle, wafer level micromirror array for large scale beam steering applications
Authenticating a source of a scripted code
Propylene oxide and derivatives process