×

Process for determining fuel quantity

  • US 5,367,462 A
  • Filed: 12/14/1993
  • Issued: 11/22/1994
  • Est. Priority Date: 12/14/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A process for determining a fuel quantity to be fed into an internal combustion engine during each intake stroke, comprising the steps of:

  • (a) determining an air intake cross-section and an angular velocity of a crank shaft for a current stroke;

    (b) determining a current intake-pipe pressure associated with predetermined operating conditions based on the air intake cross-section and angular velocity;

    (c) determining a time constant for a change in the intake-pipe pressure based on the air intake cross-section and the angular velocity of the crank shaft;

    (d) determining a projected intake-pipe pressure for a next stroke based on the current intake-pipe pressure associated with predetermined operating conditions, and the time constant for the change in intake-pipe pressure;

    (e) determining an air mass sucked into the air intake for an intake stroke based upon the projected intake pipe pressure for the next stroke; and

    (f) determining the fuel quantity to be fed to each cylinder for the next stroke based on the air mass determinations made in step (e) and a wall film model.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×