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POWERTRAIN COOLING SYSTEM WITH COOLING FLOW MODES

  • US 20140000536A1
  • Filed: 06/29/2012
  • Published: 01/02/2014
  • Est. Priority Date: 06/29/2012
  • Status: Active Grant
First Claim
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1. A powertrain cooling system for a powertrain that has an engine with a cylinder head and an engine block, comprising:

  • a coolant pump;

    a plurality of coolant flow passages;

    a first three-position valve operatively connected with an outlet of the coolant pump and having a first, a second, and a third position to at least partially establish different coolant flow modes through the coolant flow passages;

    wherein coolant flow from the coolant pump is blocked from both the cylinder head and the engine block in a first of the coolant flow modes when the three-position valve is in the first position;

    wherein coolant flow from the coolant pump is provided to the cylinder head and is blocked from the engine block in a second of the coolant flow modes when the three-position valve is in the second position; and

    wherein coolant flows from the coolant pump to the engine block and from the engine block to the cylinder head in a third of the coolant flow modes when the three-position valve is in the third position.

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