×

Idle operation control for internal combustion engines

  • US 4,509,477 A
  • Filed: 11/18/1983
  • Issued: 04/09/1985
  • Est. Priority Date: 11/19/1982
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for controlling the idle operation of an internal combustion engine comprising the steps of:

  • detecting at successive times a rotational speed of said engine and determining a variation characteristic thereof;

    determining a torque variation characteristic of said engine as a function of said rotational speed variation characteristic of said engine;

    determining a phase difference between said rotational speed variation and torque variation characteristics as a function of said engine rotational speed;

    determining a present value of engine torque variation as a function of said torque variation characteristic; and

    controlling at least one engine operation parameter in a direction to minimize said engine torque variation.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×