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Engine autostop and autorestart control

  • US 7,610,143 B1
  • Filed: 06/09/2008
  • Issued: 10/27/2009
  • Est. Priority Date: 06/09/2008
  • Status: Active Grant
First Claim
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1. A method of controlling engine operation of an engine that may be shut-down during engine idle stop conditions, the engine including a high pressure direct injection fuel system, the method comprising:

  • during at least a first fuel rail temperature below a threshold, automatically stopping engine operation during a selected engine idle stop condition without a driver requesting engine shut-down and restarting the engine at a first engine output torque amount; and

    during at least a second fuel rail temperature above the threshold, automatically stopping engine operation during the selected engine idle stop condition without the driver requesting engine shut-down and restarting the engine at a second engine output torque amount greater than the first engine output torque amount.

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