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Method for operating a cooling system of an internal combustion engine and protection system in a cooling system

  • US 10,174,666 B2
  • Filed: 02/17/2017
  • Issued: 01/08/2019
  • Est. Priority Date: 08/21/2014
  • Status: Active Grant
First Claim
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1. A method for operating a cooling system of an internal combustion engine, in which a controllable rotary slide valve having at least one switched inlet or outlet is provided, the method comprising the acts of:

  • monitoring movement of the rotary slide valve into multiple switching positions which correspond to, in each case, one cooling system state, andin a manner dependent on an improper functional state of the rotary slide valve and a present switching position of the rotary slide valve, changing an operating state of the internal combustion engine to an emergency operation state in which a rotational speed and/or a torque of the internal combustion engine is limited to a predetermined maximum emergency operation value.

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