Patent ID: 9670851
Date: 2017-06-06
CPC Classifications: F02D

Claim:
1. A method of controlling operation of an internal combustion engine, the method comprising: monitoring an angular position of a crankshaft of the engine using a crank position sensor, generating a pressure reading with a first in-cylinder pressure sensor for a first cylinder; utilizing an electronic control module to calculate a total heat generated during a combustion cycle within the first cylinder based upon the pressure reading; determining an observed crank angle within the first cylinder with the electronic control module based upon output of the crank position sensor and the first in-cylinder pressure sensor, wherein the observed crank angle is a crank angle position where a predefined percent of the total heat is generated; comparing the observed crank angle against a predetermined crank angle stored in the electronic control module, wherein the predetermined crank angle is a crank angle position where a predefined percent of the total heat is generated; generating a provisional start of injection crank angle for the first cylinder in response to the comparison of the observed crank angle and the predetermined crank angle; comparing a difference between the provisional start of injection crank angle of the first cylinder to an average start of injection crank angle for a remainder of a plurality of cylinders to a preset phasing limit value; and utilizing a fuel injector to match an actual start of fuel injection crank angle in the first cylinder to the provisional start of injection crank angle when the difference between the provisional start of injection crank angle and the average start of injection crank angle for the remainder of the plurality of cylinders is less than the preset phasing limit value.