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Fuel supply apparatus for and pressure control method of internal combustion engine

  • US 7,441,549 B2
  • Filed: 10/11/2006
  • Issued: 10/28/2008
  • Est. Priority Date: 10/13/2005
  • Status: Expired due to Fees
First Claim
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1. A fuel supply apparatus for an internal combustion engine, comprising:

  • a fuel tank;

    a pump for changing a pressure that prevails in the fuel tank;

    a sensor for detecting the pressure in the fuel tank;

    a diagnostic device for detecting a leak in a fuel vapor treatment system including the fuel tank; and

    a control device for controlling the pump by setting, when a leak has been detected by the diagnostic device, a target pressure in a steady state to a value lower than a case where the leak has not been detected, and by comparing the pressure detected by the sensor and the target pressure in the steady state.

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