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CONTROLLER FOR INTERNAL COMBUSTION ENGINE

  • US 20100010726A1
  • Filed: 06/17/2009
  • Published: 01/14/2010
  • Est. Priority Date: 07/11/2008
  • Status: Active Grant
First Claim
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1. A controller for an internal combustion engine applied to a fuel supply system in which at least one of a petroleum fuel and an alcohol fuel stored in a fuel tank is supplied to an internal combustion engine, the fuel supply system including a pump device pumping the fuel stored in the fuel tank and an injector injecting the fuel pumped by the pump device into the internal combustion engine, the injector injecting the fuel of which quantity is varied according to an alcohol concentration of the fuel, the controller detecting a fuel pressure supplied to the injector and detecting a malfunction of the pump device when the fuel pressure is less than or equal to a threshold pressure, the controller comprisingan alcohol concentration detecting means for detecting an alcohol concentration of the fuel supplied to the internal combustion engine;

  • anda threshold pressure setting means for setting the threshold pressure lower as the alcohol concentration detected by the alcohol concentration detecting means is higher.

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