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Fixed throttle torque demand strategy

  • US 5,623,906 A
  • Filed: 01/22/1996
  • Issued: 04/29/1997
  • Est. Priority Date: 01/22/1996
  • Status: Expired due to Term
First Claim
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1. A method for operating an internal combustion engine having a fixed throttle including the steps of:

  • determining a desired driver engine torque;

    determining a maximum available engine torque;

    controlling engine torque as a function of the ratio of a desired engine torque to a maximum available engine torque;

    sensing engine speed, throttle angle, exhaust gas recirculation, intake air temperature, and accelerator pedal position;

    developing signals representing engine speed, throttle angle, exhaust gas recirculation, intake air temperature, and accelerator pedal position;

    calculating the maximum available engine load;

    calculating the maximum available engine torque using engine load and engine speed;

    determining desired driver demand engine torque as a percentage of the maximum torque available; and

    reducing actual engine torque to desired engine torque by retarding spark advance and cutting out fuel injector operation.

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