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Engine cooling system

  • US 6,837,192 B2
  • Filed: 09/03/2002
  • Issued: 01/04/2005
  • Est. Priority Date: 09/10/2001
  • Status: Expired due to Term
First Claim
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1. An engine cooling system, comprising:

  • a coolant circuit extending through an engine, wherein coolant flows through the coolant circuit;

    a radiator provided in the coolant circuit, wherein the radiator cools coolant passing through the coolant circuit;

    a flow control valve, which regulates the flow rate of coolant flowing through the radiator; and

    a controller, wherein the controller controls the opening size of the flow control valve only during feedback control such that an engine coolant temperature, which is the temperature of coolant passing through the engine, seeks a predetermined target value, wherein, during feedback control, the controller controls the flow control valve such that the opening size of the flow control valve remains above a predetermined lowest value.

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