Fuel supply system of an internal combustion engine

  • US 6,889,656 B1
  • Filed: 04/26/1999
  • Issued: 05/10/2005
  • Est. Priority Date: 04/24/1998
  • Status: Active Grant
First Claim
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1. A fuel supply system for delivering fuel for an internal combustion engine, comprising a fuel tank, a first fuel pump (6) for pumping a variable pumping capacity, a mechanically driven second fuel pump (12), and at least one fuel injection valve (16), wherein the first fuel pump (6) delivers the fuel from the fuel tank into a fuel line connection (10) and the second fuel pump (12) delivers the fuel from the fuel line connection (10) by way of a fuel pressure line (14) to the fuel valve (16), via which the fuel travels at least indirectly into a combustion chamber of the engine, the first fuel pump (6) delivers the fuel into the fuel line connection (10) with a delivery capacity that is changed as a function of an operating condition of the engine, in which two pressure control valves (26, 28), which are hydraulically and functionally parallel and are set to different pressure values, are provided for monitoring a delivery pressure prevailing in the fuel line connection (10).

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