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Closed loop A/F ratio control for diesel engines using an oxygen sensor

  • US 7,137,386 B1
  • Filed: 09/02/2005
  • Issued: 11/21/2006
  • Est. Priority Date: 09/02/2005
  • Status: Expired due to Fees
First Claim
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1. A fuel control system for a diesel engine, comprising:

  • a first module that selectively regulates operation of said diesel engine in one of a closed-loop air to fuel ratio (A/F) control mode and an open-loop A/F control mode;

    a second module that calculates a block learn multiplier (BLM) based on a feedback signal when said first module operates said diesel engine in said closed-loop A/F control mode; and

    a third module that adjusts a base fueling rate of said diesel engine based on said BLM when said first module operates said diesel engine in said open-loop A/F control mode.

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