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Fail-safe engine cooling control algorithm for hybrid electric vehicle

  • US 20020163198A1
  • Filed: 05/03/2001
  • Published: 11/07/2002
  • Est. Priority Date: 05/03/2001
  • Status: Abandoned Application
First Claim
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1. A fail-safe engine cooling control system for a hybrid electric vehicle (HEV) when the engine temperature exceeds a predetermined calibratable level comprising:

  • An electric traction motor;

    An engine;

    An Engine temperature sensor;

    A system to cool the engine, whereby safe and efficient engine operating temperatures are maintained;

    A Vehicle System Controller;

    A fail-safe system to assure that in the event the system to cool the engine fails, acceptable engine temperatures are maintained while vehicle operating range is extended, adequate power is provided to the vehicle, and noise, vibration and harshness (NVH) is kept to a minimum.

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